JP2008010150A - Lighting device - Google Patents

Abstract

An object of the present invention is to make the entire surface of a lens with a multilayer film appear uniform from the outside.
An LED 1 and a lens 2 with a multilayer film are provided. When the LED 1 is turned on, light from the LED 1 is transmitted through the multilayer film and irradiated to the outside. When the LED 1 is not turned on, light from the outside is emitted. Among them, in a lighting device in which light having a wavelength band different from that of light transmitted through the multilayer film is reflected by the multilayer film, light having a large diffusion angle θ is irradiated to the extent that the lens 2 with the multilayer film reaches almost the entire surface. LED1 is used. Alternatively, a reflector 3 is provided for causing the light emitted from the LED 1 to reach almost the entire surface of the lens 2 with a multilayer film. Alternatively, the light guide lens 5 for allowing the light emitted from the LED 1 to reach almost the entire surface of the lens 2 with a multilayer film is provided separately from the lens 2 with a multilayer film.
[Selection] Figure 1

Description

  The present invention includes an LED and a lens with a multilayer film. When the LED is turned on, light from the LED is transmitted through the multilayer film and irradiated to the outside. When the LED is not turned on, The lighting device in which light having a wavelength band different from that of light transmitted through the multilayer film is reflected by the multilayer film, particularly when the LED is turned on, almost the entire surface of the lens with the multilayer film looks uniform from the outside. It is related with the illuminating device which can be made.

  2. Description of the Related Art Conventionally, an illumination device (vehicle lamp) including a lamp and a lens with a multilayer film is known. An example of this type of lighting device (vehicle lamp) is disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-103343.

  In the illumination device (vehicle lamp) described in Japanese Patent Application Laid-Open No. 2004-103343, the lens is colored, for example, red. Specifically, when the lamp is turned on, the light emitted from the lamp is colored red by the lens, and then the red light is transmitted through the multilayer film and irradiated to the outside. On the other hand, when the lamp is not lit, light of a color different from red among the light from the outside is reflected by the multilayer film.

  That is, in the lighting device (vehicle lamp) described in Japanese Patent Application Laid-Open No. 2004-103343, when the lamp is turned on, the red light transmitted through the multilayer film is irradiated to the outside, whereas the lamp is not turned on. Sometimes, light of a color different from red reflected by the multilayer film is irradiated to the outside.

  Therefore, according to the illuminating device (vehicle lamp) described in Japanese Patent Application Laid-Open No. 2004-103343, the lens with the multilayer film can be seen from the outside differently depending on whether the lamp is turned on or not. Can do.

JP 2004-103343 A

  By the way, in the lighting device (vehicle lamp) described in Japanese Patent Application Laid-Open No. 2004-103343, as described above, when the lamp is turned on, the light emitted from the lamp is colored red by the lens, and the red light is Although it is irradiated to the outside, instead of using a red LED, it is conceivable to irradiate the red light from the red LED transmitted through the colorless and transparent lens and the multilayer film to the outside when the red LED is turned on.

  However, when a red LED having a high directivity of irradiation light and a small diffusion angle of irradiation light is used, there are a portion where the light irradiated from the red LED reaches a lens with a multilayer film, and a portion where the light does not reach. It will occur. As a result, in the lens with a multilayer film, the part where the light emitted from the red LED arrives looks red from the outside, but in the part where the light emitted from the red LED does not reach, Since the light of a color different from red is reflected by the multilayer film, the portion appears to be a color different from red from the outside.

  In other words, when a red LED having a high directivity of irradiation light and a small diffusion angle of irradiation light is used, when the red LED is turned on, a portion where the light emitted from the red LED reaches and a portion where it does not reach The lens with a multilayer film looks different from the outside.

  In view of the above problems, an object of the present invention is to provide an illuminating device that can make the entire surface of a lens with a multilayer film appear to be a uniform color from the outside when an LED is turned on.

  In other words, the present invention reduces the possibility that the lens with the multilayer film will appear to be a different color from the outside between the portion where the light emitted from the LED has reached and the portion where it has not reached when the LED is turned on. An object of the present invention is to provide an illuminating device that can be used.

  According to invention of Claim 1, it comprises LED and the lens with a multilayer film, At the time of lighting of LED, the light from LED is permeate | transmitted the multilayer film, and is irradiated outside, At the time of LED non-lighting In the illuminating device in which the light having a wavelength band different from that of the light transmitted through the multilayer film is reflected by the multilayer film, the diffusion angle is large enough to reach almost the entire surface of the lens with the multilayer film. There is provided an illuminating device using an LED irradiated with light.

  According to invention of Claim 2, it comprises LED and the lens with a multilayer film, At the time of lighting of LED, the light from LED is permeate | transmitted the multilayer film and is irradiated outside, At the time of LED non-lighting In an illuminating device in which light of a wavelength different from the light transmitted through the multilayer film is reflected from the outside, the light emitted from the LED reaches almost the entire surface of the lens with the multilayer film. There is provided a lighting device characterized in that a reflector is provided.

  According to invention of Claim 3, it comprises LED and the lens with a multilayer film, At the time of lighting of LED, the light from LED is permeate | transmitted the multilayer film, and is irradiated outside, At the time of LED non-lighting In an illuminating device in which light of a wavelength different from the light transmitted through the multilayer film is reflected from the outside, the light emitted from the LED reaches almost the entire surface of the lens with the multilayer film. There is provided an illumination device characterized in that a light guide lens is provided separately from a multilayer film-equipped lens.

  According to invention of Claim 4, it comprises LED and the lens with a multilayer film, At the time of lighting of LED, the light from LED permeate | transmits a multilayer film, and is irradiated outside, At the time of LED non-lighting In an illuminating device in which light having a wavelength band different from that of light transmitted through the multilayer film is reflected by the multilayer film, the light emitted from the LED reaches almost the entire surface of the multilayer film. An illumination device characterized in that the lens with a multilayer film is provided with the light guiding function is provided.

  According to invention of Claim 5, the light-diffusion means was arrange | positioned on the optical path from LED to the lens with a multilayer film, The illuminating device as described in any one of Claims 1-4 provided Is done.

  According to the invention described in claim 6, as the LED, an LED that emits red light including a wavelength band of 600 to 660 nm is used, and as the multilayer film, blue light including a wavelength band of 450 to 500 nm, 500 to 6. The lighting device according to claim 1, wherein a multilayer film that reflects green light including a wavelength band of 550 nm and red light including a wavelength band of 660 to 780 nm is formed. Provided.

  According to the invention of claim 7, an LED that emits orange light including a wavelength band of 560 to 610 nm is used as the LED, and blue light including a wavelength band of 450 to 500 nm is used as the multilayer film. 6. The lighting device according to claim 1, wherein a multilayer film that reflects green light including a wavelength band of 550 nm and red light including a wavelength band of 630 to 780 nm is formed. Provided.

  In the illumination device according to the first aspect, an LED that irradiates light having a diffusion angle large enough to reach almost the entire surface of the lens with a multilayer film is used. Specifically, in the illumination device according to the first aspect, when the LED is turned on, the light emitted from the LED reaches almost the entire surface of the lens with the multilayer film, is transmitted through the multilayer film, and is irradiated to the outside.

  Therefore, according to the lighting device of the first aspect, when the LED is turned on, the light emitted from the LED arrives only when the light emitted from the LED reaches only a part of the lens with the multilayer film. It is possible to reduce the possibility that the lens with the multilayer film will appear as a different color from the outside between the portion and the portion that has not reached.

  In other words, according to the illumination device of the first aspect, when the LED is turned on, almost the entire surface of the lens with the multilayer film can be seen to be a uniform color from the outside.

  The illumination device according to claim 2 is provided with a reflector for causing light emitted from the LED to reach almost the entire surface of the lens with the multilayer film. Specifically, in the lighting device according to claim 2, when the LED is turned on, the light emitted from the LED is reflected by the reflector, reaches almost the entire surface of the lens with the multilayer film, and is transmitted through the multilayer film. Irradiated outside.

  Therefore, according to the illuminating device of claim 2, when the LED is turned on, the light emitted from the LED arrives only when the light emitted from the LED reaches only a part of the lens with the multilayer film. It is possible to reduce the possibility that the lens with the multilayer film will appear as a different color from the outside between the portion and the portion that has not reached.

  In other words, according to the illumination device of the second aspect, when the LED is turned on, almost the entire surface of the lens with the multilayer film can be seen to be a uniform color from the outside.

  In the illumination device according to the third aspect, the light guide lens for causing the light emitted from the LED to reach almost the entire surface of the lens with the multilayer film is provided separately from the lens with the multilayer film. Specifically, in the illumination device according to claim 3, when the LED is turned on, light emitted from the LED is guided by the light guide lens, reaches almost the entire surface of the lens with the multilayer film, and passes through the multilayer film. It is urged and irradiated outside.

  Therefore, according to the illumination device according to claim 3, when the LED is turned on, the light emitted from the LED arrives only when the light emitted from the LED reaches only a part of the lens with the multilayer film. It is possible to reduce the possibility that the lens with the multilayer film will appear as a different color from the outside between the portion and the portion that has not reached.

  In other words, according to the illumination device of the third aspect, when the LED is turned on, almost the entire surface of the lens with the multilayer film can be seen as a uniform color from the outside.

  In the illumination device according to claim 4, the lens with the multilayer film is provided with a light guide function for causing the light emitted from the LED to reach almost the entire surface of the multilayer film. Specifically, in the illumination device according to claim 4, when the LED is turned on, the light emitted from the LED is guided by the lens portion of the lens with the multilayer film and reaches almost the entire surface of the multilayer film. Is transmitted to the outside.

  Therefore, according to the illuminating device of claim 4, when the LED is turned on, the light emitted from the LED arrives only when the light emitted from the LED reaches only a part of the lens with the multilayer film. It is possible to reduce the possibility that the lens with the multilayer film will appear as a different color from the outside between the portion and the portion that has not reached.

  In other words, according to the illuminating device of the fourth aspect, when the LED is turned on, almost the entire surface of the lens with the multilayer film can be seen as a uniform color from the outside.

  In the illumination device according to claim 5, the light diffusing means is arranged on the optical path from the LED to the lens with the multilayer film. Therefore, according to the illuminating device of the fifth aspect, the lens with the multilayer film is made larger than when the light diffusing means is not disposed, and almost the entire surface of the lens with the multilayer film is uniform from the outside when the LED is turned on. You can make it look like any color.

  In the illumination device according to claim 6, an LED that emits red light including a wavelength band of 600 to 660 nm is used as the LED, and blue light including a wavelength band of 450 to 500 nm is used as the multilayer film. A multilayer film that reflects green light including a wavelength band and red light including a wavelength band of 660 to 780 nm is formed.

  Therefore, according to the illuminating device of claim 6, without reducing the amount of light emitted to the outside when the LED is turned on, when the LED is not turned on, the silver system, the yellow system reflected by the multilayer film, Light in the yellow-green, pink, or crimson wavelength band can be irradiated to the outside.

  In the illuminating device according to claim 7, an LED that emits orange light including a wavelength band of 560 to 610 nm is used as the LED, and blue light including a wavelength band of 450 to 500 nm is used as a multilayer film. A multilayer film that reflects green light including the wavelength band and red light including the wavelength band of 630 to 780 nm is formed.

  Therefore, according to the illuminating device of claim 7, without reducing the amount of light irradiated to the outside when the LED is turned on, when the LED is not turned on, the silver system, the yellow system reflected by the multilayer film, Light in the yellow-green, pink, or crimson wavelength band can be irradiated to the outside.

  Hereinafter, a first embodiment of the illumination device of the present invention will be described. 1 and 2 are cross-sectional views of the illumination device of the first embodiment. Specifically, FIG. 1 is a cross-sectional view of the illumination device of the first embodiment showing the optical path when the LED 1 is lit, and FIG. 2 is the cross-sectional view of the illumination device of the first embodiment showing the optical path when the LED 1 is not lit. It is sectional drawing.

  1 and 2, 1 'indicates the main optical axis of the LED 1, and 2 indicates a lens with a multilayer film. Although not shown in detail, in the illuminating device of the first embodiment, the multilayer film is formed on the inner surface of the lens (the left side surface of the lens with multilayer film 2 in FIG. 1). In the modification of the illumination device of the first embodiment, it is also possible to form a multilayer film on the outer surface of the lens (the right surface of the lens with multilayer film 2 in FIG. 1) instead. If the multilayer film is formed on the outer surface of the lens (the right side surface of the lens with multilayer film 2 in FIG. 1), the multilayer film may be worn on the inner surface of the lens. (The left surface of the multilayer film-equipped lens 2 in FIG. 1).

  In the illumination device of the first embodiment, for example, red light is emitted from the LED 1. When the LED 1 is turned on, as shown in FIG. 1, the red light L1 from the LED 1 is transmitted through the multilayer film and irradiated to the outside (the right side of the multilayer film-equipped lens 2 in FIG. 1). Therefore, the red light L1 'transmitted through the multilayer film is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 1).

  On the other hand, when the LED 1 is not lit, as shown in FIG. 2, among the light L2 from the outside (the right side of the multilayer film-equipped lens 2 in FIG. 2), for example, natural light, red light L2 ′ in some wavelength bands. Can permeate through the multilayer film. Further, light L2 ″ such as silver light, yellow light, pink light, and crimson light having a wavelength band different from that of the red light L2 ′ transmitted through the multilayer film is reflected by the multilayer film. From the right side of the lens 2 with multilayer film 2), the light L2 "having a wavelength band different from that of the red light L1 'and L2' transmitted through the multilayer film, such as silver light, yellow light, pink light, and crimson light. Can be seen.

  In other words, in the illuminating device of the first embodiment, the appearance from the outside (the right side of the lens 2 with the multilayer film in FIGS. 1 and 2) differs between when the LED 1 is lit and when the LED 1 is not lit.

  Furthermore, in the illumination device of the first embodiment, as shown in FIG. 1, an LED 1 that irradiates red light L <b> 1 having a large diffusion angle θ to reach almost the entire surface of the multilayered lens 2 is used. Specifically, in the illumination device of the first embodiment, as shown in FIG. 1, when the LED 1 is turned on, the red light L1 emitted from the LED 1 reaches almost the entire surface of the multilayer film-equipped lens 2, and the multilayer film is formed. The light is transmitted and irradiated to the outside (the right side of the multilayer film-equipped lens 2 in FIG. 1).

  Therefore, according to the illumination device of the first embodiment, when the LED 1 is turned on, the red light L1 emitted from the LED 1 reaches only a part of the multilayered lens 2 and the red light emitted from the LED 1 is emitted. It is possible to reduce the possibility that the lens 2 with the multilayer film will appear different colors from the outside (the right side of the lens 2 with the multilayer film in FIG. 1) between the portion where the light L1 has reached and the portion where it has not reached. In other words, according to the illuminating device of the first embodiment, when the LED 1 is turned on, almost the entire surface of the lens 2 with the multilayer film appears to be a uniform color from the outside (the right side of the lens 2 with the multilayer film in FIG. 1). Can be.

  FIG. 20 is a view showing an LED of a modification of the illumination device of the first embodiment. In the illumination device of the first embodiment, as shown in FIGS. 1 and 2, an LED chip that does not include a lens such as a mold resin is used as the LED 1 that emits the light L1 having a large diffusion angle θ. However, in the modification of the lighting device of the first embodiment, as shown in FIGS. 20A and 20B, the upper surface of the LED 1 that emits the light L1 having a large diffusion angle θ is planar. For example, it is also possible to use an LED chip provided with a lens such as a mold resin. Further, in the modification of the lighting device of the first embodiment, as shown in FIG. 20C, the LED 1 that emits the light L1 having a large diffusion angle θ has a concave upper surface, such as a mold resin. It is also possible to use an LED chip having such a lens. Alternatively, in the modification of the lighting device of the first embodiment, as shown in FIG. 20D, the upper surface of the LED 1 that irradiates the light L1 having a large diffusion angle θ has a convex shape with a relatively high flatness. It is also possible to use an LED chip provided with a lens such as a molded resin. According to the modification of the illumination device of the first embodiment shown in FIG. 20, since the light can be emitted more widely than the Lambertian characteristic of the LED chip, the LED 1 as in the illumination device of the first embodiment. The arrangement interval can be increased.

  As described above, in the illumination device according to the first embodiment, the LED 1 that emits red light is used, and the red light L1 emitted from the LED 1 is transmitted through the multilayer film. In the modified example of the illumination device of the embodiment, instead of the LED 1 that emits white light, a red lens or a red coating film is disposed between the LED 1 and the multilayer film, and the red lens or the red coating film causes a red color. It is also possible to allow the colored light to pass through the multilayer film.

  Specifically, in the first example of the illumination device according to the first embodiment, the LED 1 that emits red light having a wavelength band of 600 to 660 nm is used, and the wavelength band and reflection of light reflected by the multilayer film are used. The multilayer film is formed so that the relationship with the rate becomes the relationship shown in FIG.

  FIG. 3 is a diagram showing the relationship between the wavelength band of light reflected by the multilayer film of the first example of the lighting apparatus of the first embodiment and the reflectance. As shown in FIG. 3, in the multilayer film of the first example of the illumination device of the first embodiment, red light including a wavelength band of 600 to 660 nm is transmitted, and blue light including a wavelength band of 450 to 500 nm, Green light including a wavelength band of 500 to 550 nm and red light (specifically, crimson light) including a wavelength band of 660 to 780 nm are reflected.

  In the first example of the lighting device of the first embodiment, when the LED 1 is turned on, as shown in FIGS. 1 and 3, the red light L1 emitted from the LED 1 is transmitted through the multilayer film and externally (FIG. 1). The right side of the lens with multilayer film 2 is irradiated. Therefore, the red light L1 'transmitted through the multilayer film is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 1).

  On the other hand, when the LED 1 is not lit, as shown in FIGS. 2 and 3, red light in a part of the wavelength band of the light L <b> 2 such as natural light from the outside (right side of the multilayer film-equipped lens 2 in FIG. 2). Light L2 ′ is transmitted through the multilayer film. Further, blue light, green light, and crimson light L2 ″ having a wavelength band different from that of the red light L2 ′ transmitted through the multilayer film are reflected by the multilayer film. From the right side of 2), silver light L2 ″ in which blue light, green light and crimson light are mixed is seen. Specifically, when the proportion of blue light is high, it becomes blue strong silver light L2 ", when the proportion of green light is high, it becomes strong green silver light L2", and the proportion of crimson light is high In addition, a strong red silver light L2 ″ is obtained.

  Table 1 shows details of the multilayer film used in the first example of the lighting apparatus of the first embodiment.

As shown in Table 1, in the first example of the illuminating device of the first embodiment, a multilayer film is constituted by eleven layers of films. Specifically, the first layer is formed of TiO ₂ , the refractive index of the first layer is set to 2.0, and the thickness of the first layer is set to 180 nm. The second layer is made of SiO ₂ , the refractive index of the second layer is set to 1.46, and the thickness of the second layer is set to 180 nm. Further, the third layer is formed of TiO ₂ , the refractive index of the third layer is set to 2.0, and the thickness of the third layer is set to 360 nm. The fourth layer is made of SiO ₂ , the refractive index of the fourth layer is set to 1.46, and the thickness of the fourth layer is set to 180 nm. Further, the fifth layer is formed of TiO ₂ , the refractive index of the fifth layer is set to 2.0, and the thickness of the fifth layer is set to 180 nm.

The sixth layer is formed of SiO ₂ , the refractive index of the sixth layer is set to 1.46, and the thickness of the sixth layer is set to 180 nm. Further, the seventh layer is formed of TiO ₂ , the refractive index of the seventh layer is set to 2.0, and the thickness of the seventh layer is set to 180 nm. The eighth layer is made of SiO ₂ , the refractive index of the eighth layer is set to 1.46, and the thickness of the eighth layer is set to 180 nm. Further, the ninth layer is made of TiO ₂ , the refractive index of the ninth layer is set to 2.0, and the thickness of the ninth layer is set to 360 nm. The tenth layer is made of SiO ₂ , the refractive index of the tenth layer is set to 1.46, and the thickness of the tenth layer is set to 180 nm. Furthermore, in the 11th layer is formed by TiO _2, the refractive index of the eleventh layer is set to 2.0, the thickness of the 11th layer is set to 180 nm.

  Further, in the second example of the lighting device of the first embodiment, the LED 1 that emits red light in the wavelength band of 600 to 660 nm is used, and the wavelength band and reflectance of the light reflected by the multilayer film The multilayer film is formed so that the relationship shown in FIG.

  FIG. 4 is a diagram showing the relationship between the wavelength band of light reflected by the multilayer film of the second example of the lighting apparatus of the first embodiment and the reflectance. As shown in FIG. 4, in the multilayer film of the second example of the lighting apparatus of the first embodiment, red light including a wavelength band of 600 to 660 nm is transmitted, and blue light including a wavelength band of 450 to 500 nm, Green light including a wavelength band of 500 to 550 nm and red light (specifically, crimson light) including a wavelength band of 660 to 780 nm are reflected.

As shown in Table 1, in the second example of the lighting apparatus according to the first embodiment, a multilayer film is constituted by eleven layers of films. Specifically, the first layer is formed of TiO ₂ , the refractive index of the first layer is set to 2.0, and the thickness of the first layer is set to 174 nm. The second layer is made of SiO ₂ , the refractive index of the second layer is set to 1.46, and the thickness of the second layer is set to 174 nm. Further, the third layer is formed of TiO ₂ , the refractive index of the third layer is set to 2.0, and the thickness of the third layer is set to 261 nm. The fourth layer is formed of SiO ₂ , the refractive index of the fourth layer is set to 1.46, and the thickness of the fourth layer is set to 174 nm. Further, the fifth layer is formed of TiO ₂ , the refractive index of the fifth layer is set to 2.0, and the thickness of the fifth layer is set to 174 nm.

The sixth layer is formed of SiO ₂ , the refractive index of the sixth layer is set to 1.46, and the thickness of the sixth layer is set to 174 nm. Further, the seventh layer is formed of TiO ₂ , the refractive index of the seventh layer is set to 2.0, and the thickness of the seventh layer is set to 174 nm. The eighth layer is made of SiO ₂ , the refractive index of the eighth layer is set to 1.46, and the thickness of the eighth layer is set to 174 nm. Further, the ninth layer is made of TiO ₂ , the refractive index of the ninth layer is set to 2.0, and the thickness of the ninth layer is set to 261 nm. The tenth layer is made of SiO ₂ , the refractive index of the tenth layer is set to 1.46, and the thickness of the tenth layer is set to 174 nm. Furthermore, in the 11th layer is formed by TiO _2, the refractive index of the eleventh layer is set to 2.0, the thickness of the 11th layer is set to 174 nm.

  Furthermore, in the third example of the lighting device of the first embodiment, the LED 1 that emits red light in the wavelength band of 600 to 660 nm is used, and the wavelength band and reflectance of the light reflected by the multilayer film The multilayer film is formed so that the relationship shown in FIG.

  FIG. 5 is a diagram showing the relationship between the wavelength band of light reflected by the multilayer film of the third example of the lighting apparatus of the first embodiment and the reflectance. As shown in FIG. 5, in the multilayer film of the third example of the lighting device of the first embodiment, red light including a wavelength band of 600 to 660 nm is transmitted, and blue light including a wavelength band of 450 to 500 nm, Green light including a wavelength band of 500 to 550 nm and red light (specifically, crimson light) including a wavelength band of 660 to 780 nm are reflected.

As shown in Table 1, in the third example of the illumination device of the first embodiment, a multilayer film is configured by nine layers of films. Specifically, the first layer is formed of TiO ₂ , the refractive index of the first layer is set to 2.0, and the thickness of the first layer is set to 155 nm. The second layer is made of SiO ₂ , the refractive index of the second layer is set to 1.46, and the thickness of the second layer is set to 155 nm. Further, the third layer is formed of TiO ₂ , the refractive index of the third layer is set to 2.0, and the thickness of the third layer is set to 155 nm. The fourth layer is made of SiO ₂ , the refractive index of the fourth layer is set to 1.46, and the thickness of the fourth layer is set to 155 nm. Further, the fifth layer is formed of TiO ₂ , the refractive index of the fifth layer is set to 2.0, and the thickness of the fifth layer is set to 310 nm.

The sixth layer is made of SiO ₂ , the refractive index of the sixth layer is set to 1.46, and the thickness of the sixth layer is set to 155 nm. Further, the seventh layer is formed of TiO ₂ , the refractive index of the seventh layer is set to 2.0, and the thickness of the seventh layer is set to 155 nm. The eighth layer is made of SiO ₂ , the refractive index of the eighth layer is set to 1.46, and the thickness of the eighth layer is set to 155 nm. Further, the ninth layer is formed of TiO ₂ , the refractive index of the ninth layer is set to 2.0, and the thickness of the ninth layer is set to 155 nm.

  Furthermore, in the 4th example of the illuminating device of 1st Embodiment, what irradiates red light of the wavelength range of 600-660 nm is used as LED1, and the wavelength range and reflectance of the light reflected by a multilayer film are used. The multilayer film is formed so that the relationship shown in FIG.

  FIG. 6 is a diagram showing the relationship between the wavelength band of light reflected by the multilayer film of the fourth example of the lighting apparatus of the first embodiment and the reflectance. As shown in FIG. 6, in the multilayer film of the fourth example of the illuminating device of the first embodiment, red light including a wavelength band of 600 to 660 nm is transmitted, and green light including a wavelength band of 500 to 550 nm, And red light (specifically, crimson light) including a wavelength band of 660 to 780 nm is reflected.

  In the fourth example of the illuminating device of the first embodiment, when the LED 1 is turned on, as shown in FIGS. 1 and 6, the red light L1 emitted from the LED 1 is transmitted through the multilayer film and externally (FIG. 1). The right side of the lens with multilayer film 2 is irradiated. Therefore, the red light L1 'transmitted through the multilayer film is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 1).

  On the other hand, when the LED 1 is not lit, as shown in FIGS. 2 and 6, red light in a part of the wavelength band of the light L <b> 2 such as natural light from the outside (the right side of the multilayer film-equipped lens 2 in FIG. 2). Light L2 ′ is transmitted through the multilayer film. Further, the green light and the crimson light L2 ″ having a wavelength band different from that of the red light L2 ′ transmitted through the multilayer film are reflected by the multilayer film. Therefore, the outside (the right side of the lens 2 with the multilayer film in FIG. 2). Shows yellow light L2 ″ in which green light and crimson light are mixed. Specifically, when the proportion of green light is high, it becomes yellow-green light L2 ″, and when the proportion of crimson light is high, it becomes orange light L2 ″.

  Table 2 shows details of the multilayer film used in the fourth example of the lighting apparatus of the first embodiment.

As shown in Table 2, in the fourth example of the lighting device of the first embodiment, a multilayer film is configured by nine layers of films. Specifically, the first layer is formed of TiO ₂ , the refractive index of the first layer is set to 2.0, and the thickness of the first layer is set to 236 nm. The second layer is made of SiO ₂ , the refractive index of the second layer is set to 1.46, and the thickness of the second layer is set to 362 nm. Further, the third layer is formed of TiO ₂ , the refractive index of the third layer is set to 2.0, and the thickness of the third layer is set to 173 nm. The fourth layer is formed of SiO ₂ , the refractive index of the fourth layer is set to 1.46, and the thickness of the fourth layer is set to 173 nm. Further, the fifth layer is formed of TiO ₂ , the refractive index of the fifth layer is set to 2.0, and the thickness of the fifth layer is set to 142 nm.

The sixth layer is formed of SiO ₂ , the refractive index of the sixth layer is set to 1.46, and the thickness of the sixth layer is set to 268 nm. Further, the seventh layer is formed of TiO ₂ , the refractive index of the seventh layer is set to 2.0, and the thickness of the seventh layer is set to 205 nm. The eighth layer is made of SiO ₂ , the refractive index of the eighth layer is set to 1.46, and the thickness of the eighth layer is set to 173 nm. Further, the ninth layer is made of TiO ₂ , the refractive index of the ninth layer is set to 2.0, and the thickness of the ninth layer is set to 173 nm.

  Further, in the fifth example of the lighting device of the first embodiment, the LED 1 that emits red light in the wavelength band of 600 to 660 nm is used, and the wavelength band and reflectance of light reflected by the multilayer film are used. The multilayer film is formed so that the relationship shown in FIG.

  FIG. 7 is a diagram showing the relationship between the wavelength band of light reflected by the multilayer film of the fifth example of the lighting apparatus of the first embodiment and the reflectance. As shown in FIG. 7, in the multilayer film of the fifth example of the lighting device of the first embodiment, red light including a wavelength band of 600 to 660 nm is transmitted, and blue light including a wavelength band of 450 to 500 nm, Green light including a wavelength band of 500 to 550 nm and red light (specifically, crimson light) including a wavelength band of 660 to 780 nm are reflected.

  In the fifth example of the illuminating device of the first embodiment, when the LED 1 is turned on, as shown in FIGS. 1 and 7, the red light L1 emitted from the LED 1 is transmitted through the multilayer film and externally (FIG. 1). The right side of the lens with multilayer film 2 is irradiated. Therefore, the red light L1 'transmitted through the multilayer film is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 1).

  On the other hand, when the LED 1 is not turned on, as shown in FIG. 2 and FIG. 7, red light in a part of the wavelength band of the light L2 such as natural light from the outside (right side of the multilayer film-equipped lens 2 in FIG. 2). Light L2 ′ is transmitted through the multilayer film. Further, blue light, green light, and crimson light L2 ″ having a wavelength band different from that of the red light L2 ′ transmitted through the multilayer film are reflected by the multilayer film. From the right side of the lens 2, pink light L <b> 2 ″ in which blue light, green light, and crimson light are mixed is seen. Specifically, green light is made less than blue light and crimson light. More specifically, when the proportion of green light is high, it becomes cherry color light L2 ″, and when the proportion of green light is low, it becomes dark purple light L2 ″. Further, when the ratio of crimson light is high, the color becomes strong red wine color light L2 ″, and when the ratio of blue light is high, it becomes blue-violet light L2 ″.

  Table 3 shows details of the multilayer film used in the fifth example of the lighting apparatus of the first embodiment.

As shown in Table 3, in the fifth example of the illuminating device of the first embodiment, a multilayer film is composed of 11 layers. Specifically, the first layer is made of TiO ₂ , the refractive index of the first layer is set to 2.0, and the thickness of the first layer is set to 145 nm. The second layer is made of SiO ₂ , the refractive index of the second layer is set to 1.46, and the thickness of the second layer is set to 145 nm. Further, the third layer is formed of TiO ₂ , the refractive index of the third layer is set to 2.0, and the thickness of the third layer is set to 290 nm. The fourth layer is made of SiO ₂ , the refractive index of the fourth layer is set to 1.46, and the thickness of the fourth layer is set to 145 nm. Further, the fifth layer is formed of TiO ₂ , the refractive index of the fifth layer is set to 2.0, and the thickness of the fifth layer is set to 145 nm.

The sixth layer is formed of SiO ₂ , the refractive index of the sixth layer is set to 1.46, and the thickness of the sixth layer is set to 145 nm. Further, the seventh layer is formed of TiO ₂ , the refractive index of the seventh layer is set to 2.0, and the thickness of the seventh layer is set to 290 nm. The eighth layer is formed of SiO ₂ , the refractive index of the eighth layer is set to 1.46, and the thickness of the eighth layer is set to 145 nm. Further, the ninth layer is made of TiO ₂ , the refractive index of the ninth layer is set to 2.0, and the thickness of the ninth layer is set to 145 nm. Further, the tenth layer is formed of SiO ₂ , the refractive index of the tenth layer is set to 1.46, and the thickness of the tenth layer is set to 145 nm. Furthermore, in the 11th layer is formed by TiO _2, the refractive index of the eleventh layer is set to 2.0, the thickness of the 11th layer is set to 290 nm.

  Furthermore, in the sixth example of the illumination device of the first embodiment, the LED 1 that emits red light having a wavelength band of 600 to 660 nm is used, and the wavelength band and reflectance of light reflected by the multilayer film are used. The multilayer film is formed so that the relationship shown in FIG.

  FIG. 8 is a diagram showing the relationship between the wavelength band of light reflected by the multilayer film of the sixth example of the lighting apparatus of the first embodiment and the reflectance. As shown in FIG. 8, in the multilayer film of the sixth example of the lighting apparatus of the first embodiment, red light including a wavelength band of 600 to 660 nm is transmitted and red light including a wavelength band of 660 to 780 nm ( In detail, crimson light) is reflected.

  In the sixth example of the illuminating device of the first embodiment, when the LED 1 is turned on, as shown in FIGS. 1 and 8, the red light L1 emitted from the LED 1 is transmitted through the multilayer film and externally (FIG. 1). The right side of the lens with multilayer film 2 is irradiated. Therefore, the red light L1 'transmitted through the multilayer film is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 1).

  On the other hand, when the LED 1 is not lit, as shown in FIG. 2 and FIG. 8, red of some wavelength bands in the light L2 such as natural light from the outside (the right side of the multilayer film-equipped lens 2 in FIG. 2). Light L2 ′ is transmitted through the multilayer film. Further, the crimson light L2 ″ having a wavelength band different from that of the red light L2 ′ transmitted through the multilayer film is reflected by the multilayer film. Therefore, from the outside (the right side of the lens 2 with the multilayer film in FIG. 2), Crimson light L2 "is visible.

  Table 4 shows the details of the multilayer film used in the sixth example of the lighting apparatus of the first embodiment.

As shown in Table 4, in the sixth example of the illuminating device of the first embodiment, a multilayer film is configured by 14 layers of films. Specifically, the first layer is formed of TiO ₂ , the refractive index of the first layer is set to 2.0, and the thickness of the first layer is set to 188 nm. The second layer is made of SiO ₂ , the refractive index of the second layer is set to 1.46, and the thickness of the second layer is set to 188 nm. Further, the third layer is made of TiO ₂ , the refractive index of the third layer is set to 2.0, and the thickness of the third layer is set to 188 nm. The fourth layer is formed of SiO ₂ , the refractive index of the fourth layer is set to 1.46, and the thickness of the fourth layer is set to 188 nm. Further, the fifth layer is formed of TiO ₂ , the refractive index of the fifth layer is set to 2.0, and the thickness of the fifth layer is set to 188 nm.

The sixth layer is made of SiO ₂ , the refractive index of the sixth layer is set to 1.46, and the thickness of the sixth layer is set to 188 nm. Further, the seventh layer is formed of TiO ₂ , the refractive index of the seventh layer is set to 2.0, and the thickness of the seventh layer is set to 188 nm. The eighth layer is made of SiO ₂ , the refractive index of the eighth layer is set to 1.46, and the thickness of the eighth layer is set to 188 nm. Further, the ninth layer is formed of TiO ₂ , the refractive index of the ninth layer is set to 2.0, and the thickness of the ninth layer is set to 188 nm. The tenth layer is formed of SiO ₂ , the refractive index of the tenth layer is set to 1.46, and the thickness of the tenth layer is set to 188 nm. Furthermore, in the 11th layer is formed by TiO _2, the refractive index of the eleventh layer is set to 2.0, the thickness of the 11th layer is set to 188 nm. The twelfth layer is formed of SiO ₂ , the refractive index of the twelfth layer is set to 1.46, and the thickness of the twelfth layer is set to 188 nm. Furthermore, the 13th layer is formed of TiO ₂ , the refractive index of the 13th layer is set to 2.0, and the thickness of the 13th layer is set to 188 nm. The 14th layer is made of SiO ₂ , the refractive index of the 14th layer is set to 1.46, and the thickness of the 14th layer is set to 94 nm.

  Hereinafter, a second embodiment of the illumination device of the present invention will be described. The illumination device of the second embodiment is configured in substantially the same manner as the illumination device of the first embodiment shown in FIGS.

  In the illumination device of the second embodiment, for example, orange light is emitted from the LED 1. When the LED 1 is turned on, as shown in FIG. 1, the orange light L1 from the LED 1 is transmitted through the multilayer film and irradiated to the outside (the right side of the multilayer film-equipped lens 2 in FIG. 1). Therefore, the orange light L1 'transmitted through the multilayer film is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 1).

  On the other hand, when the LED 1 is not lit, as shown in FIG. 2, the orange light L2 ′ in a part of the wavelength band of the light L2 such as natural light from the outside (right side of the multilayer film-equipped lens 2 in FIG. 2). Can permeate through the multilayer film. Further, light L2 ″ such as silver light, yellow light, pink light, and crimson light having a wavelength band different from that of the orange light L2 ′ transmitted through the multilayer film is reflected by the multilayer film. From the right side of the lens 2 with a multilayer film 2), the light L2 "having a wavelength band different from that of the orange light L1 'and L2' transmitted through the multilayer film, such as silver light, yellow light, pink light, and crimson light. Can be seen.

  In other words, in the illumination device of the second embodiment, the appearance from the outside (the right side of the lens 2 with the multilayer film in FIGS. 1 and 2) differs between when the LED 1 is lit and when the LED 1 is not lit.

  Furthermore, in the illumination device of the second embodiment, as shown in FIG. 1, an LED 1 that irradiates orange light L1 having a large diffusion angle θ to reach almost the entire surface of the multilayered lens 2 is used. Specifically, in the illumination device of the second embodiment, as shown in FIG. 1, when the LED 1 is turned on, the orange light L1 emitted from the LED 1 reaches almost the entire surface of the lens 2 with the multilayer film, The light is transmitted and irradiated to the outside (the right side of the multilayer film-equipped lens 2 in FIG. 1).

  Therefore, according to the illumination device of the second embodiment, when the LED 1 is turned on, the orange light L1 emitted from the LED 1 reaches only a part of the lens 2 with the multilayer film, and the orange emitted from the LED 1 is emitted. It is possible to reduce the possibility that the multilayered lens 2 will appear different colors from the outside (the right side of the multilayered lens 2 in FIG. 1) between the portion where the colored light L1 has reached and the portion where it has not reached. In other words, according to the illumination device of the second embodiment, when the LED 1 is turned on, almost the entire surface of the lens 2 with the multilayer film appears to be a uniform color from the outside (the right side of the lens 2 with the multilayer film in FIG. 1). Can be.

  In detail, in the 1st example of the illuminating device of 2nd Embodiment, what irradiates the orange light of the wavelength range of 560-610 nm is used as LED1.

  Furthermore, in the multilayer film of the first example of the lighting device of the second embodiment, orange light including a wavelength band of 560 to 610 nm is transmitted, blue light including a wavelength band of 450 to 500 nm, and a wavelength of 500 to 550 nm. Green light including a band and red light including a wavelength band of 630 to 780 nm are reflected.

  Therefore, in the first example of the lighting device of the second embodiment, when the LED 1 is not lit, as shown in FIG. 2, light such as natural light from the outside (right side of the multilayer film-equipped lens 2 in FIG. 2) is obtained. Of L2, orange light L2 ′ in a part of the wavelength band is transmitted through the multilayer film. Also, blue light, green light, and red light L2 ″ having different wavelength bands from the orange light L2 ′ that is transmitted through the multilayer film are reflected by the multilayer film. Therefore, the external (lens with multilayer film 2 in FIG. 2) is reflected. From the right side), for example, silver light L2 ″ in which blue light, green light, and red light are mixed is seen.

  Hereinafter, a third embodiment of the illumination device of the present invention will be described. The illumination device of the third embodiment is configured in substantially the same manner as the illumination device of the first embodiment shown in FIGS.

  In the illumination device of the third embodiment, for example, green light is emitted from the LED 1. When the LED 1 is turned on, as shown in FIG. 1, the green light L1 from the LED 1 is transmitted through the multilayer film and irradiated to the outside (the right side of the multilayer film-equipped lens 2 in FIG. 1). Therefore, the green light L1 'transmitted through the multilayer film is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 1).

  On the other hand, when the LED 1 is not lit, as shown in FIG. 2, green light L2 ′ in a part of the wavelength band of the light L2 from the outside (right side of the multilayer film-equipped lens 2 in FIG. 2), for example, natural light. Can permeate through the multilayer film. Further, for example, silver light L2 ″ having a wavelength band different from that of the green light L2 ′ transmitted through the multilayer film is reflected by the multilayer film. Therefore, from the outside (the right side of the lens 2 with the multilayer film in FIG. 2), For example, silver light L2 ″ having a different wavelength band from the green light L1 ′ and L2 ′ transmitted through the multilayer film is visible.

  In other words, in the illumination device of the third embodiment, the appearance from the outside (the right side of the lens 2 with the multilayer film in FIGS. 1 and 2) differs between when the LED 1 is lit and when the LED 1 is not lit.

  Furthermore, in the illumination device of the third embodiment, as shown in FIG. 1, an LED 1 that irradiates green light L1 having a large diffusion angle θ to the extent that it reaches almost the entire surface of the multilayered lens 2 is used. Specifically, in the illumination device of the third embodiment, as shown in FIG. 1, when the LED 1 is turned on, the green light L1 emitted from the LED 1 reaches almost the entire surface of the lens 2 with the multilayer film, and the multilayer film is formed. The light is transmitted and irradiated to the outside (the right side of the multilayer film-equipped lens 2 in FIG. 1).

  Therefore, according to the illumination device of the third embodiment, when the LED 1 is turned on, the green light L1 emitted from the LED 1 reaches only a part of the multilayered lens 2 and the green light emitted from the LED 1 is emitted. It is possible to reduce the possibility that the lens 2 with the multilayer film will appear different colors from the outside (the right side of the lens 2 with the multilayer film in FIG. 1) between the portion where the light L1 has reached and the portion where it has not reached. In other words, according to the illumination device of the third embodiment, when the LED 1 is turned on, almost the entire surface of the lens 2 with a multilayer film appears to be a uniform color from the outside (right side of the lens 2 with a multilayer film in FIG. 1). Can be.

  Specifically, in the first example of the illumination device of the third embodiment, the LED 1 that emits green light is used, and the relationship between the wavelength band of light reflected by the multilayer film and the reflectance is shown in FIG. A multilayer film is formed so as to satisfy the relationship shown in FIG.

  FIG. 9 is a diagram showing the relationship between the wavelength band of light reflected by the multilayer film of the first example of the lighting apparatus of the third embodiment and the reflectance. As shown in FIG. 9, in the multilayer film of the first example of the lighting apparatus of the third embodiment, green light is transmitted, light having a shorter wavelength than green light, and light having a longer wavelength than green light. Is reflected. Specifically, blue light, yellow light, and red light are reflected.

  In the first example of the illuminating device of the third embodiment, when the LED 1 is turned on, as shown in FIGS. 1 and 9, the green light L1 emitted from the LED 1 is transmitted through the multilayer film and externally (FIG. 1). The right side of the lens with multilayer film 2 is irradiated. Therefore, the green light L1 'transmitted through the multilayer film is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 1).

  On the other hand, when the LED 1 is not lit, as shown in FIG. 2 and FIG. 9, green light in a part of the wavelength band of the light L2 such as natural light from the outside (right side of the multilayer film-equipped lens 2 in FIG. 2). Light L2 ′ is transmitted through the multilayer film. In addition, blue light, yellow light, and red light L2 ″ having a wavelength band different from that of the green light L2 ′ that is transmitted through the multilayer film are reflected by the multilayer film. From the right side), a silver light L2 ″ in which blue light, yellow light and red light are mixed is seen.

  Table 5 shows details of the multilayer film used in the first example of the illumination device of the third embodiment.

As shown in Table 5, in the first example of the illuminating device of the third embodiment, a multilayer film is constituted by eleven layers of films. Specifically, the first layer is made of TiO ₂ , the refractive index of the first layer is set to 2.0, and the thickness of the first layer is set to 131 nm. The second layer is made of SiO ₂ , the refractive index of the second layer is set to 1.46, and the thickness of the second layer is set to 131 nm. Further, the third layer is formed of TiO ₂ , the refractive index of the third layer is set to 2.0, and the thickness of the third layer is set to 263 nm. The fourth layer is made of SiO ₂ , the refractive index of the fourth layer is set to 1.46, and the thickness of the fourth layer is set to 131 nm. Further, the fifth layer is formed of TiO ₂ , the refractive index of the fifth layer is set to 2.0, and the thickness of the fifth layer is set to 131 nm.

The sixth layer is formed of SiO ₂ , the refractive index of the sixth layer is set to 1.46, and the thickness of the sixth layer is set to 131 nm. Further, the seventh layer is formed of TiO ₂ , the refractive index of the seventh layer is set to 2.0, and the thickness of the seventh layer is set to 131 nm. The eighth layer is formed of SiO ₂ , the refractive index of the eighth layer is set to 1.46, and the thickness of the eighth layer is set to 131 nm. Further, the ninth layer is made of TiO ₂ , the refractive index of the ninth layer is set to 2.0, and the thickness of the ninth layer is set to 263 nm. The tenth layer is formed of SiO ₂ , the refractive index of the tenth layer is set to 1.46, and the thickness of the tenth layer is set to 131 nm. Further, the eleventh layer is formed of TiO ₂ , the refractive index of the eleventh layer is set to 2.0, and the thickness of the eleventh layer is set to 131 nm.

  Hereinafter, a fourth embodiment of the illumination device of the present invention will be described. The illumination device of the fourth embodiment is configured in substantially the same manner as the illumination device of the first embodiment shown in FIGS.

  In the illumination device of the fourth embodiment, for example, blue light is emitted from the LED 1. When the LED 1 is turned on, as shown in FIG. 1, the blue light L1 from the LED 1 is transmitted through the multilayer film and irradiated to the outside (the right side of the multilayer film-equipped lens 2 in FIG. 1). Therefore, the blue light L1 'transmitted through the multilayer film is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 1).

  On the other hand, when the LED 1 is not lit, as shown in FIG. 2, the blue light L2 ′ in a part of the wavelength band of the light L2, such as natural light, from the outside (the right side of the multilayer film-equipped lens 2 in FIG. 2). Can permeate through the multilayer film. Further, for example, silver light L2 ″ having a wavelength band different from that of the blue light L2 ′ transmitted through the multilayer film is reflected by the multilayer film. Therefore, from the outside (the right side of the lens 2 with the multilayer film in FIG. 2), For example, silver light L2 ″ having a different wavelength band from the blue light L1 ′ and L2 ′ transmitted through the multilayer film can be seen.

  In other words, in the illumination device of the fourth embodiment, the appearance from the outside (the right side of the multilayer film-equipped lens 2 in FIGS. 1 and 2) differs between when the LED 1 is lit and when the LED 1 is not lit.

  Furthermore, in the illumination device according to the fourth embodiment, as shown in FIG. 1, an LED 1 that irradiates blue light L1 having a large diffusion angle θ to reach almost the entire surface of the multilayered lens 2 is used. Specifically, in the lighting device of the fourth embodiment, as shown in FIG. 1, when the LED 1 is turned on, the blue light L1 emitted from the LED 1 reaches almost the entire surface of the lens 2 with the multilayer film, and the multilayer film is formed. The light is transmitted and irradiated to the outside (the right side of the multilayer film-equipped lens 2 in FIG. 1).

  Therefore, according to the illumination device of the fourth embodiment, when the LED 1 is turned on, the blue light L1 emitted from the LED 1 reaches only a part of the lens 2 with the multilayer film, and the blue light emitted from the LED 1 is emitted. It is possible to reduce the possibility that the lens 2 with the multilayer film will appear different colors from the outside (the right side of the lens 2 with the multilayer film in FIG. 1) between the portion where the light L1 has reached and the portion where it has not reached. In other words, according to the illuminating device of the fourth embodiment, when the LED 1 is turned on, almost the entire surface of the lens 2 with a multilayer film appears to be a uniform color from the outside (right side of the lens 2 with a multilayer film in FIG. 1). Can be.

  Specifically, in the first example of the illumination device of the fourth embodiment, the LED 1 that emits blue light is used, and the relationship between the wavelength band of light reflected by the multilayer film and the reflectance is shown in FIG. A multilayer film is formed so as to satisfy the relationship shown in FIG.

  FIG. 10 is a diagram showing the relationship between the wavelength band of light reflected by the multilayer film of the first example of the illumination device of the fourth embodiment and the reflectance. As shown in FIG. 10, in the multilayer film of the first example of the illumination device of the fourth embodiment, most of the blue light is transmitted and light having a wavelength longer than that of the blue light is reflected. Specifically, a portion of blue light, green light, and red light are reflected.

  In the first example of the illumination device of the fourth embodiment, when the LED 1 is turned on, as shown in FIGS. 1 and 10, most of the blue light L1 emitted from the LED 1 is transmitted through the multilayer film, The light is irradiated on the right side of the multilayer film-equipped lens 2 in FIG. Therefore, the blue light L1 'transmitted through the multilayer film is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 1).

  On the other hand, when the LED 1 is not lit, as shown in FIGS. 2 and 10, blue light in a part of the wavelength band of the light L2 such as natural light from the outside (right side of the multilayer film-equipped lens 2 in FIG. 2). Most of the light L2 ′ is transmitted through the multilayer film. Further, a part of the blue light L2 ″ that has not been transmitted through the multilayer film and the green light and the red light L2 ″ that have different wavelength bands from the blue light L2 ′ that has been transmitted through the multilayer film are reflected by the multilayer film. . Therefore, silver light L2 ″ in which blue light, green light, and red light are mixed is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 2).

  Table 6 shows the details of the multilayer film used in the first example of the illumination device of the fourth embodiment.

As shown in Table 6, in the first example of the illumination device according to the fourth embodiment, a multilayer film is constituted by six layers of films. Specifically, the first layer is formed of TiO ₂ , the refractive index of the first layer is set to 2.0, and the thickness of the first layer is set to 143 nm. The second layer is formed of SiO ₂ , the refractive index of the second layer is set to 1.46, and the thickness of the second layer is set to 143 nm. Further, the third layer is formed of TiO ₂ , the refractive index of the third layer is set to 2.0, and the thickness of the third layer is set to 143 nm. The fourth layer is formed of SiO ₂ , the refractive index of the fourth layer is set to 1.46, and the thickness of the fourth layer is set to 143 nm. Further, the fifth layer is formed of TiO ₂ , the refractive index of the fifth layer is set to 2.0, and the thickness of the fifth layer is set to 143 nm. The sixth layer is formed of SiO ₂ , the refractive index of the sixth layer is set to 1.46, and the thickness of the sixth layer is set to 71 nm.

  Hereinafter, a fifth embodiment of the illumination device of the present invention will be described. The illumination device of the fifth embodiment is configured in substantially the same manner as the illumination device of the first embodiment shown in FIGS.

  In the illumination device of the fifth embodiment, for example, white light is emitted from the LED 1. When the LED 1 is turned on, as shown in FIG. 1, most of the blue light and yellow light constituting the white light L1 from the LED 1 is transmitted through the multilayer film, and the outside (on the right side of the lens 2 with the multilayer film in FIG. 1). ). Therefore, the white light L1 'transmitted through the multilayer film is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 1).

  On the other hand, when the LED 1 is not lit, as shown in FIG. 2, among the light L2 such as natural light from the outside (right side of the multilayer film-equipped lens 2 in FIG. 2), the blue light constituting the white light L2 ′ and Most of the yellow light is transmitted through the multilayer film. In addition, a part of the blue light L2 ″ that has not been transmitted through the multilayer film and a blue light that constitutes a part of the white light L2 ′ that has been transmitted through the multilayer film are green light and red light L2 ″ that have different wavelength bands. However, it is reflected by the multilayer film, and those lights are mixed and irradiated as silver light. Therefore, from the outside (right side of the multilayer film-equipped lens 2 in FIG. 2), for example, silver light L2 ″ having a wavelength band different from that of the white light L1 ′ and L2 ′ transmitted through the multilayer film is visible.

  In other words, in the illumination device of the fifth embodiment, the appearance from the outside (the right side of the lens 2 with the multilayer film in FIGS. 1 and 2) differs between when the LED 1 is lit and when the LED 1 is not lit.

  Furthermore, in the illumination device of the fifth embodiment, as shown in FIG. 1, an LED 1 that irradiates white light L1 having a large diffusion angle θ to reach almost the entire surface of the multilayered lens 2 is used. Specifically, in the illumination device of the fifth embodiment, as shown in FIG. 1, when the LED 1 is turned on, the white light L1 emitted from the LED 1 reaches almost the entire surface of the lens 2 with the multilayer film, The light is transmitted and irradiated to the outside (the right side of the multilayer film-equipped lens 2 in FIG. 1).

  Therefore, according to the illumination device of the fifth embodiment, when the LED 1 is turned on, the white light L1 emitted from the LED 1 reaches only a part of the multilayered lens 2 and the white light emitted from the LED 1 is emitted. It is possible to reduce the possibility that the lens 2 with the multilayer film will appear different colors from the outside (the right side of the lens 2 with the multilayer film in FIG. 1) between the portion where the light L1 has reached and the portion where it has not reached. In other words, according to the illuminating device of the fifth embodiment, when the LED 1 is turned on, almost the entire surface of the lens 2 with a multilayer film appears to be a uniform color from the outside (right side of the lens 2 with a multilayer film in FIG. 1). Can be.

  Specifically, in the first example of the illumination device of the fifth embodiment, the LED 1 that emits white light is used, and the relationship between the wavelength band of light reflected by the multilayer film and the reflectance is shown in FIG. A multilayer film is formed so as to satisfy the relationship shown in FIG.

  FIG. 11 is a diagram showing the relationship between the wavelength band of light reflected by the multilayer film of the first example of the lighting apparatus of the fifth embodiment and the reflectance. As shown in FIG. 11, in the multilayer film of the first example of the illumination device of the fifth embodiment, most of the blue light and yellow light constituting the white light are transmitted, a part of the blue light, and the green light. Most of the light and red light is reflected.

  In the first example of the illumination device of the fifth embodiment, when the LED 1 is turned on, as shown in FIGS. 1 and 11, most of the blue light and yellow light constituting the white light L1 emitted from the LED 1 The light is transmitted through the multilayer film and irradiated to the outside (on the right side of the multilayer film-equipped lens 2 in FIG. 1). Therefore, the white light L1 'transmitted through the multilayer film is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 1).

  On the other hand, when the LED 1 is not lit, as shown in FIGS. 2 and 11, blue light in a part of the wavelength band of the light L2 such as natural light from the outside (the right side of the multilayer film-equipped lens 2 in FIG. 2). Most of the light and yellow light L2 ′ are transmitted through the multilayer film. Further, a part of the blue light L2 ″ that has not been transmitted through the multilayer film and the green light and the red light L2 ″ that have different wavelength bands from the blue light L2 ′ that has been transmitted through the multilayer film are reflected by the multilayer film. . Therefore, silver light L2 ″ in which blue light, green light, and red light are mixed is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 2).

  Table 7 shows details of the multilayer film used in the first example of the illumination device of the fifth embodiment.

As shown in Table 7, in the first example of the illumination device according to the fifth embodiment, a multilayer film is configured by nine layers of films. Specifically, the first layer is formed of TiO ₂ , the refractive index of the first layer is set to 2.0, and the thickness of the first layer is set to 450 nm. The second layer is made of SiO ₂ , the refractive index of the second layer is set to 1.46, and the thickness of the second layer is set to 300 nm. Further, the third layer is formed of TiO ₂ , the refractive index of the third layer is set to 2.0, and the thickness of the third layer is set to 90 nm. The fourth layer is made of SiO ₂ , the refractive index of the fourth layer is set to 1.46, and the thickness of the fourth layer is set to 210 nm. Further, the fifth layer is formed of TiO ₂ , the refractive index of the fifth layer is set to 2.0, and the thickness of the fifth layer is set to 450 nm.

The sixth layer is formed of SiO ₂ , the refractive index of the sixth layer is set to 1.46, and the thickness of the sixth layer is set to 45 nm. Further, the seventh layer is formed of TiO ₂ , the refractive index of the seventh layer is set to 2.0, and the thickness of the seventh layer is set to 90 nm. The eighth layer is made of SiO ₂ , the refractive index of the eighth layer is set to 1.46, and the thickness of the eighth layer is set to 345 nm. Further, the ninth layer is formed of TiO ₂ , the refractive index of the ninth layer is set to 2.0, and the thickness of the ninth layer is set to 210 nm.

  Hereinafter, a sixth embodiment of the illumination device of the present invention will be described. 12 and 13 are sectional views of the illumination device of the sixth embodiment. Specifically, FIG. 12 is a cross-sectional view of the illumination device of the sixth embodiment showing the light path when the LED 1 is turned on, and FIG. 13 is a view of the illumination device of the sixth embodiment showing the light path when the LED 1 is not turned on. It is sectional drawing.

  12 and 13, reference numeral 3 denotes a reflector for reflecting the light L1 emitted from the LED1.

  In the illumination device of the sixth embodiment, for example, red light is emitted from the LED 1. When the LED 1 is turned on, as shown in FIG. 12, the red light L1 from the LED 1 is reflected by the reflector 3, transmitted through the multilayer film, and irradiated to the outside (the right side of the lens 2 with the multilayer film in FIG. 12). . Therefore, the red light L1 'transmitted through the multilayer film is visible from the outside (right side of the multilayer film-equipped lens 2 in FIG. 12).

  On the other hand, when the LED 1 is not lit, as shown in FIG. 13, among the light L2 such as natural light from the outside (the right side of the multilayer film-equipped lens 2 in FIG. 13), red light L2 ′ in some wavelength bands. Can permeate through the multilayer film. Further, light L2 ″ such as silver light, yellow light, pink light, and crimson light having a wavelength band different from that of the red light L2 ′ transmitted through the multilayer film is reflected by the multilayer film. From the right side of the lens 2 with multilayer film 13), the light L2 "having a wavelength band different from that of the red light L1 'and L2' transmitted through the multilayer film, such as silver light, yellow light, pink light, and crimson light. Can be seen.

  In other words, in the illumination device of the sixth embodiment, the appearance from the outside (the right side of the multilayer film-equipped lens 2 in FIGS. 12 and 13) differs between when the LED 1 is lit and when the LED 1 is not lit.

  Furthermore, in the illuminating device of 6th Embodiment, as shown in FIG. 12, the reflector 3 for making the red light L1 irradiated from LED1 reach the substantially whole surface of the lens 2 with a multilayer film is provided. Specifically, in the lighting device of the sixth embodiment, when the LED 1 is turned on, the red light L1 emitted from the LED 1 is reflected by the reflector 3 and reaches almost the entire surface of the lens 2 with the multilayer film, The light is transmitted and irradiated to the outside (the right side of the multilayer film-equipped lens 2 in FIG. 12).

  Therefore, according to the illumination device of the sixth embodiment, when the LED 1 is turned on, the red light L1 emitted from the LED1 reaches only a part of the multilayer film-equipped lens 2 and the red light emitted from the LED1. It is possible to reduce the possibility that the lens 2 with the multilayer film will appear different colors from the outside (the right side of the lens 2 with the multilayer film in FIG. 12) in the part where the light L1 has reached and the part where it has not reached. In other words, according to the illumination device of the sixth embodiment, when the LED 1 is turned on, almost the entire surface of the lens 2 with a multilayer film appears to be a uniform color from the outside (right side of the lens 2 with a multilayer film in FIG. 12). Can be.

  Hereinafter, a seventh embodiment of the illumination device of the present invention will be described. 14 and 15 are cross-sectional views of the illumination device of the seventh embodiment. Specifically, FIG. 14 is a cross-sectional view of the illumination device of the seventh embodiment showing the light path when the LED 1 is turned on, and FIG. 15 is a view of the illumination device of the seventh embodiment showing the light path when the LED 1 is not turned on. It is sectional drawing.

  14 and 15, reference numeral 4 denotes a light diffusing lens arranged on the optical path from the LED 1 to the multilayered lens 2.

  In the illumination device of the seventh embodiment, for example, red light is emitted from the LED 1. When the LED 1 is turned on, as shown in FIG. 14, the red light L1 from the LED 1 is reflected by the light diffusing lens 4, reflected by the reflector 3, transmitted through the multilayer film, and externally (with the multilayer film in FIG. 14). Irradiated on the upper side of the lens 2. Therefore, the red light L <b> 1 ′ transmitted through the multilayer film can be seen from the outside (upper side of the multilayer film-equipped lens 2 in FIG. 14).

  On the other hand, when the LED 1 is not lit, as shown in FIG. 15, among the light L2 such as natural light from the outside (the upper side of the multilayer film-equipped lens 2 in FIG. 15), red light L2 ′ in some wavelength bands. Can permeate through the multilayer film. Further, light L2 ″ such as silver light, yellow light, pink light, and crimson light having a wavelength band different from that of the red light L2 ′ transmitted through the multilayer film is reflected by the multilayer film. From the upper side of the lens 15 with the multilayer film 15), the light L 2 ″ having a wavelength band different from that of the red light L 1 ′ and L 2 ′ transmitted through the multilayer film, such as silver light, yellow light, pink light, and crimson light. Can be seen.

  In other words, in the illumination device of the seventh embodiment, the appearance from the outside (the upper side of the multilayer film-equipped lens 2 in FIGS. 14 and 15) differs between when the LED 1 is lit and when the LED 1 is not lit.

  Furthermore, in the illumination device of the seventh embodiment, as shown in FIG. 14, the reflector 3 and the light diffusion lens 4 for causing the red light L <b> 1 irradiated from the LED 1 to reach almost the entire surface of the lens 2 with a multilayer film are provided. Is provided. Specifically, in the illumination device of the seventh embodiment, when the LED 1 is turned on, the red light L1 emitted from the LED 1 is reflected by the light diffusion lens 4, reflected by the reflector 3, and the multilayer film-equipped lens 2 The light reaches almost the entire surface, is transmitted through the multilayer film, and is irradiated to the outside (upper side of the lens 2 with the multilayer film in FIG. 14).

  Therefore, according to the illumination device of the seventh embodiment, when the LED 1 is turned on, the red light L1 emitted from the LED 1 reaches only a part of the multilayered lens 2 and the red light emitted from the LED 1 is emitted. It is possible to reduce the possibility that the lens 2 with the multilayer film will be seen in different colors from the outside (the upper side of the lens 2 with the multilayer film in FIG. 14) between the part where the light L1 has reached and the part where it has not reached. In other words, according to the illumination device of the seventh embodiment, when the LED 1 is turned on, almost the entire surface of the lens 2 with a multilayer film appears to be a uniform color from the outside (the upper side of the lens 2 with a multilayer film in FIG. 14). Can be.

  Furthermore, in the illumination device of the seventh embodiment, as shown in FIGS. 14 and 15, the light diffusion lens 4 is disposed on the optical path from the LED 1 to the lens 2 with a multilayer film. Therefore, according to the illuminating device of the seventh embodiment, the lens 2 with a multilayer film is made larger than the illuminating device of the sixth embodiment shown in FIGS. 12 and 13 where the light diffusing lens 4 is not disposed. be able to.

  Hereinafter, an eighth embodiment of the illumination device of the present invention will be described. 16 and 17 are cross-sectional views of the illumination device according to the eighth embodiment. Specifically, FIG. 16 is a cross-sectional view of the lighting device of the eighth embodiment showing the optical path when the LED 1 is turned on, and FIG. 17 is the sectional view of the lighting device of the eighth embodiment showing the light path when the LED 1 is not turned on. It is sectional drawing.

  16 and 17, reference numeral 5 denotes a light guide lens for causing the light emitted from the LED 1 to reach almost the entire surface of the lens 2 with a multilayer film.

  In the illumination device of the eighth embodiment, for example, red light is emitted from the LED 1. When the LED 1 is turned on, as shown in FIG. 16, the red light L1 from the LED 1 is guided to the lens 2 with the multilayer film by the light guide lens 5, is transmitted through the multilayer film, and externally (with the multilayer film in FIG. 16). Irradiated on the upper side of the lens 2. Therefore, the red light L <b> 1 ′ transmitted through the multilayer film is visible from the outside (the upper side of the lens 2 with the multilayer film in FIG. 16).

  On the other hand, when the LED 1 is not lit, as shown in FIG. 17, among the light L2 such as natural light from the outside (the upper side of the multilayer film-equipped lens 2 in FIG. 17), red light L2 ′ in some wavelength bands. Can permeate through the multilayer film. Further, light L2 ″ such as silver light, yellow light, pink light, and crimson light having a wavelength band different from that of the red light L2 ′ transmitted through the multilayer film is reflected by the multilayer film. 17 from the upper side of the lens 2 with the multilayer film 17), for example, light L2 "having a wavelength band different from that of the red light L1 'and L2' transmitted through the multilayer film, such as silver light, yellow light, pink light, and crimson light. Can be seen.

  In other words, in the illumination device of the eighth embodiment, the appearance from the outside (the upper side of the multilayer film-equipped lens 2 in FIGS. 16 and 17) differs between when the LED 1 is lit and when the LED 1 is not lit.

  Furthermore, in the illumination device of the eighth embodiment, as shown in FIG. 16, a light guide lens 5 is provided for causing the red light L <b> 1 irradiated from the LED 1 to reach almost the entire surface of the lens 2 with a multilayer film. . Specifically, in the lighting device of the eighth embodiment, when the LED 1 is turned on, the red light L1 emitted from the LED 1 is guided by the light guide lens 5 and reaches almost the entire surface of the multilayer-coated lens 2; The light is transmitted through the multilayer film and irradiated to the outside (the upper side of the lens with multilayer film 2 in FIG. 16).

  Therefore, according to the lighting device of the eighth embodiment, when the LED 1 is turned on, the red light L1 emitted from the LED 1 reaches only a part of the multilayer film-equipped lens 2 and the red light emitted from the LED 1 is emitted. It is possible to reduce the possibility that the lens 2 with the multilayer film will be seen in different colors from the outside (the upper side of the lens 2 with the multilayer film in FIG. 16) in the portion where the light L1 has reached and the portion where it has not reached. In other words, according to the illuminating device of the eighth embodiment, when the LED 1 is turned on, almost the entire surface of the lens 2 with a multilayer film appears to be a uniform color from the outside (the upper side of the lens 2 with a multilayer film in FIG. 16). Can be.

  The ninth embodiment of the illumination device of the present invention will be described below. 18 and 19 are cross-sectional views of the illumination device of the ninth embodiment. Specifically, FIG. 18 is a cross-sectional view of the illumination device of the ninth embodiment showing the optical path when the LED 1 is lit, and FIG. 19 is the cross-sectional view of the illumination device of the ninth embodiment showing the optical path when the LED 1 is not lit. It is sectional drawing.

  In the illumination device of the ninth embodiment, the light guide function for causing the light emitted from the LED 1 to reach almost the entire surface of the outer surface (upper side in FIGS. 18 and 19) of the lens 2 with the multilayer film is a multilayer film. The attached lens 2 is provided. Furthermore, in the lens 2 with a multilayer film of the illumination device of the ninth embodiment, the multilayer film is formed on the outer surface of the lens (the upper side of the lens 2 with the multilayer film in FIGS. 18 and 19).

  In the illumination device of the ninth embodiment, for example, red light is emitted from the LED 1. When the LED 1 is turned on, as shown in FIG. 18, the red light L1 from the LED 1 is guided by the multilayer film-equipped lens 2, is transmitted through the multilayer film, and externally (upper side of the multilayer film-equipped lens 2 in FIG. 18). Is irradiated. Therefore, the red light L1 'transmitted through the multilayer film can be seen from the outside (the upper side of the lens 2 with the multilayer film in FIG. 18).

  On the other hand, when the LED 1 is not lit, as shown in FIG. 19, among the light L2 such as natural light from the outside (the upper side of the multilayer film-equipped lens 2 in FIG. 19), red light L2 ′ in some wavelength bands. Can permeate through the multilayer film. Further, light L2 ″ such as silver light, yellow light, pink light, and crimson light having a wavelength band different from that of the red light L2 ′ transmitted through the multilayer film is reflected by the multilayer film. From the upper side of the lens with multilayer film 19), the red light L1 ′ and L2 ′ transmitted through the multilayer film has a wavelength band different from that of light L2 ″ such as silver light, yellow light, pink light, and crimson light. Can be seen.

  In other words, in the illumination device of the ninth embodiment, the appearance from the outside (the upper side of the multilayer film-equipped lens 2 in FIGS. 18 and 19) differs between when the LED 1 is lit and when the LED 1 is not lit.

  Furthermore, in the illumination device of the ninth embodiment, as shown in FIG. 18, the light guide function for causing the red light L1 emitted from the LED 1 to reach almost the entire surface of the lens 2 with a multilayer film has a lens 2 with a multilayer film. Is provided. In detail, in the illumination device of the ninth embodiment, when the LED 1 is turned on, the red light L1 emitted from the LED 1 is guided by the lens 2 with the multilayer film, and is almost entirely on the upper surface of the lens 2 with the multilayer film. It reaches, penetrates through the multilayer film, and is irradiated to the outside (upper side of the lens 2 with the multilayer film in FIG. 18).

  Therefore, according to the lighting device of the ninth embodiment, when the LED 1 is turned on, the red light L1 emitted from the LED 1 reaches only a part of the multilayer film-equipped lens 2 and the red light emitted from the LED 1 is emitted. It is possible to reduce the possibility that the lens 2 with the multilayer film will be seen in different colors from the outside (the upper side of the lens 2 with the multilayer film in FIG. 18) in the portion where the light L1 has reached and the portion where it has not reached. In other words, according to the illuminating device of the ninth embodiment, when the LED 1 is turned on, almost the entire surface of the lens 2 with a multilayer film appears to be a uniform color from the outside (the upper side of the lens 2 with a multilayer film in FIG. 18). Can be.

  In the lighting devices of the first to ninth embodiments described above, and their modifications, and in each of these examples, silver, yellow, pink and crimson reflections from the multilayer film when the LED 1 is not lit. Although light is irradiated, in those other variations, the reflection of any color on the CIE chromaticity coordinates is achieved by changing the balance of the blue, green, and red components contained in the reflected light. It is possible to irradiate light.

Further, in each of the examples of the illumination devices according to the first to fifth embodiments described above, the refractive index of the high refractive index layer (TiO ₂ layer) is set to 2.0. In addition, the refractive index of the high refractive index layer (TiO ₂ layer) can be set to an arbitrary value of 1.6 to 2.5. Further, in each of the examples of the illumination devices according to the first to fifth embodiments described above, the refractive index of the low refractive index layer (SiO ₂ layer) is set to 1.46. In addition, the refractive index of the low refractive index layer (SiO ₂ layer) can be set to an arbitrary value of 1.3 to 1.55.

  Furthermore, in the illumination devices of the first to ninth embodiments described above, and modifications thereof, and in each of these examples, as the lens of the lens 2 with a multilayer film, for example, acrylic resin, polycarbonate, glass, etc. Such transparent materials are used, and preferably dyes capable of producing a clear color are incorporated into these materials.

  As described above, in the illumination device according to the second embodiment, the LED 1 that emits orange light is used, and the orange light L1 emitted from the LED 1 is transmitted through the multilayer film. In the modification of the lighting device of the embodiment, instead of the LED 1 that emits white light, an orange lens or an orange coating film is disposed between the LED 1 and the multilayer film, and the orange lens or orange color is used. It is also possible to allow light colored orange by the coating film to be transmitted through the multilayer film.

  Further, in the illumination device of the third embodiment, an LED 1 that emits green light is used, and the green light L1 emitted from the LED 1 is transmitted through the multilayer film, but the illumination of the third embodiment Instead of using a device that emits white light as the LED 1, a green lens or a green coating film is disposed between the LED 1 and the multilayer film, and the device is colored green by the green lens or the green coating film. It is also possible to allow the transmitted light to pass through the multilayer film.

  Furthermore, in the illumination device of the fourth embodiment, an LED 1 that emits blue light is used, and the blue light L1 emitted from the LED 1 is transmitted through the multilayer film. However, the illumination of the fourth embodiment Instead of using a device that emits white light as the LED 1, a blue lens or a blue coating film is disposed between the LED 1 and the multilayer film, and the device is colored blue by the blue lens or the blue coating film. It is also possible to allow the transmitted light to pass through the multilayer film.

  In addition, in the illumination devices of the first to ninth embodiments described above, and modifications thereof, and in each of these examples, for example, a wet method, a vapor deposition method, a plasma-assisted vapor deposition method, a sputtering method, etc. A multilayer film is formed by an arbitrary method.

Furthermore, in each of the examples of the illumination devices of the first to fifth embodiments described above, a TiO ₂ layer is formed as the high refractive index layer. However, in those modified examples, instead, as the high refractive index layer, For example, a zirconia oxide layer, a tantalum oxide layer, or a layer containing these layers can be formed.

Further, in each of the examples of the illumination devices of the first to fifth embodiments described above, the SiO ₂ layer is formed as the low refractive index layer, but in those modified examples, instead, as the low refractive index layer, For example, it is possible to form a magnesium fluoride layer, an organic polymer layer, or the like.

  In the illumination devices of the first to sixth, eighth, and ninth embodiments described above, and their examples, the light diffusion lens 4 is not disposed on the optical path from the LED 1 to the lens 2 with the multilayer film. However, in these modified examples, it is also possible to dispose a light diffusion lens (not shown) for diffusing the light from the LED 1 on the optical path from the LED 1 to the lens with multilayer film 2 instead. .

  In the illuminating device of the tenth embodiment, the illuminating devices of the first to ninth embodiments described above, the modified examples thereof, and the respective examples can be appropriately combined.

  The lighting device of the present invention can be applied to, for example, vehicle lamps, gaming machine lighting, general lighting, and the like.

It is sectional drawing of the illuminating device of 1st Embodiment which showed the optical path at the time of lighting of LED1. It is sectional drawing of the illuminating device of 1st Embodiment which showed the optical path at the time of non-lighting of LED1. It is the figure which showed the relationship between the wavelength range of the light reflected by the multilayer film of the 1st example of the illuminating device of 1st Embodiment, and a reflectance. It is the figure which showed the relationship between the wavelength range of the light reflected by the multilayer film of the 2nd example of the illuminating device of 1st Embodiment, and a reflectance. It is the figure which showed the relationship between the wavelength range and reflectance of the light reflected by the multilayer film of the 3rd example of the illuminating device of 1st Embodiment. It is the figure which showed the relationship between the wavelength range of the light reflected by the multilayer film of the 4th example of the illuminating device of 1st Embodiment, and a reflectance. It is the figure which showed the relationship between the wavelength range and reflectance of the light reflected by the multilayer film of the 5th example of the illuminating device of 1st Embodiment. It is the figure which showed the relationship between the wavelength range of the light reflected by the multilayer film of the 6th example of the illuminating device of 1st Embodiment, and a reflectance. It is the figure which showed the relationship between the wavelength range of the light reflected by the multilayer film of the 1st example of the illuminating device of 3rd Embodiment, and a reflectance. It is the figure which showed the relationship between the wavelength range and the reflectance of the light reflected by the multilayer film of the 1st example of the illuminating device of 4th Embodiment. It is the figure which showed the relationship between the wavelength range and reflectance of the light reflected by the multilayer film of the 1st example of the illuminating device of 5th Embodiment. It is sectional drawing of the illuminating device of 6th Embodiment which showed the optical path at the time of lighting of LED1. It is sectional drawing of the illuminating device of 6th Embodiment which showed the optical path at the time of LED1 non-lighting. It is sectional drawing of the illuminating device of 7th Embodiment which showed the optical path at the time of lighting of LED1. It is sectional drawing of the illuminating device of 7th Embodiment which showed the optical path at the time of LED1 non-lighting. It is sectional drawing of the illuminating device of 8th Embodiment which showed the optical path at the time of lighting of LED1. It is sectional drawing of the illuminating device of 8th Embodiment which showed the optical path at the time of LED1 non-lighting. It is sectional drawing of the illuminating device of 9th Embodiment which showed the optical path at the time of lighting of LED1. It is sectional drawing of the illuminating device of 9th Embodiment which showed the optical path at the time of non-lighting of LED1. It is the figure which showed LED of the modification of the illuminating device of 1st Embodiment.

Explanation of symbols

1 LED
2 Lens with multilayer film 3 Reflector 4 Light diffusion lens 5 Light guide lens

Claims (7)

  It includes an LED and a lens with a multilayer film. When the LED is turned on, light from the LED is transmitted through the multilayer film and irradiated to the outside. When the LED is not turned on, the multilayer film is out of the light from the outside. In an illumination device in which light having a wavelength band different from that of transmitted light is reflected by a multilayer film, an LED that is irradiated with light having a large diffusion angle to reach almost the entire surface of the lens with the multilayer film is used. A lighting device.   It includes an LED and a lens with a multilayer film. When the LED is turned on, light from the LED is transmitted through the multilayer film and irradiated to the outside. When the LED is not turned on, the multilayer film is out of the light from the outside. In a lighting device in which light having a wavelength band different from that of light to be transmitted is reflected by a multilayer film, a reflector is provided for causing the light emitted from the LED to reach almost the entire surface of the lens with the multilayer film. Lighting device.   It includes an LED and a lens with a multilayer film. When the LED is turned on, light from the LED is transmitted through the multilayer film and irradiated to the outside. When the LED is not turned on, the multilayer film is out of the light from the outside. In a lighting device in which light having a wavelength band different from that of the transmitted light is reflected by the multilayer film, a light guide lens for causing the light emitted from the LED to reach almost the entire surface of the multilayer film lens is a lens with the multilayer film. A lighting device characterized by being provided separately.   It includes an LED and a lens with a multilayer film. When the LED is turned on, light from the LED is transmitted through the multilayer film and irradiated to the outside. When the LED is not turned on, the multilayer film is out of the light from the outside. In a lighting device in which light having a wavelength band different from that of the transmitted light is reflected by the multilayer film, the lens with the multilayer film has a light guide function for causing the light emitted from the LED to reach almost the entire surface of the multilayer film. A lighting device characterized by that.   The illumination device according to any one of claims 1 to 4, wherein a light diffusing unit is disposed on an optical path from the LED to the lens with the multilayer film.   As the LED, an LED that emits red light including a wavelength band of 600 to 660 nm is used, and as the multilayer film, blue light including a wavelength band of 450 to 500 nm, green light including a wavelength band of 500 to 550 nm, and The lighting device according to claim 1, wherein a multilayer film that reflects red light including a wavelength band of 660 to 780 nm is formed.   As the LED, an LED that emits orange light including a wavelength band of 560 to 610 nm is used, and as the multilayer film, blue light including a wavelength band of 450 to 500 nm, green light including a wavelength band of 500 to 550 nm, and The lighting device according to claim 1, wherein a multilayer film that reflects red light including a wavelength band of 630 to 780 nm is formed.

Images