CN106950785B - A light source device and lighting device - Google Patents

Abstract

The present invention protects a light source device, comprising a laser light source and a light splitting device located on a laser optical path, the light splitting device transmits part of the laser light to form a first laser, and reflects a part of the laser light to form a second laser, the wavelength conversion device is located on the first optical path, receives The first laser converts at least part of the first laser into light of different wavelengths and then reflects it back to the spectroscopic device. The scattering and reflection device is located on the second optical path, and converts the second laser into second light with different light distributions. It is reflected back to the spectroscopic device, the spectroscopic device partially reflects the first light and partially transmits the second light, and the first light reflected by the spectroscopic device and the second light transmitted by the spectroscopic device are combined into one beam and exit. It enables the spectroscopic device to emit both the first light and the second light in any area on the outgoing light path, avoiding the adverse effect of the selective transmittance of the spectroscopic device on the laser light and the received laser light on the uniformity of the final outgoing light in the prior art , thereby improving the uniformity of the light output of the light source.

Description

A light source device and lighting device

technical field

The present invention relates to the field of lighting, in particular to a light source device and a lighting device.

Background technique

At present, a large number of white light sources are used in the field of lighting and projection display. Common white light sources include LED and UHP bulbs, etc., which provide a uniform white light beam and are used in lighting fields such as stage lights, theater lights, searchlights, etc., as well as LCD, LCOS and The projector field represented by DMD. For LED light sources, it has good reliability and color performance, but due to the large etendue, the beam is relatively divergent in the field of lighting, and the brightness in the field of projection is limited; for light bulb light sources, its The required optical effect can be achieved, but the bottleneck is the lifespan problem. The lifespan of the light bulb light source is generally only a few hundred to one or two thousand hours, which greatly limits the promotion of its application. With the development of technology, the scheme of using semiconductor lasers as excitation light sources to excite phosphors as light sources is gradually replacing traditional lighting sources.

However, in practical applications, when the laser and the fluorescence excited by the laser combine light, the problem of light uniformity often occurs, which makes the color distribution of the emitted light uneven.

SUMMARY OF THE INVENTION

Aiming at the defect of poor color uniformity of the light source in the prior art, the present invention provides a light source device with good uniformity and high brightness:

Including a laser light source for emitting laser light, including a light splitting device, located on the laser light path, the light splitting device transmits part of the laser light to form the first laser light, and reflects part of the laser light to form the second laser light, the light path where the first laser light is located is the first light path, the The optical path where the two lasers are located is the second optical path; it includes a wavelength conversion device, located on the first optical path, for receiving the first laser light, and converting at least part of the first laser light into light of different wavelengths to form a first light output with a wavelength of The conversion device reflects the first light back to the light splitting device, and the light splitting device partially reflects the first light; including a scattering reflection device, located on the second optical path, for converting the second laser light into second light with different light distribution, and converting the The second light is reflected back to the spectroscopic device, and the spectroscopic device partially transmits the second light; the first light reflected by the spectroscopic device and the second light transmitted by the spectroscopic device are combined into one beam and emitted.

Preferably, a light shaping device is included, located on the laser light path between the laser light source and the light splitting device, and the light shaping device sequentially includes a convex lens, a concave lens and a diffusing sheet along the direction of the laser light path.

Preferably, the spectroscopic device includes two or more transparent sheets arranged in layers.

Preferably, there is an air gap between the transparent sheets.

Preferably, the spectroscopic device includes a first transparent sheet, the first transparent sheet is the transparent sheet closest to the wavelength conversion device among the transparent sheets, and the spectroscopic device further includes a filter film, the filter film is located on the first transparent sheet close to the wavelength conversion device On the surface of the filter, the filter film transmits the laser light and reflects the first light.

Preferably, the spectroscopic device includes a second transparent sheet, the second transparent sheet is the transparent sheet farthest from the wavelength conversion device among the transparent sheets, and the spectroscopic device further includes an anti-reflection film, the anti-reflection film is located on the second transparent sheet away from the wavelength conversion device. on the surface of the device.

Preferably, the spectroscopic device includes a first region and a second region, the first region partially transmits the laser light and partially reflects the laser light, and the second region reflects the first light and transmits the second light.

Preferably, the wavelength conversion device includes a stationary phosphor powder sheet or a rotatable phosphor color wheel.

The present invention also provides a light source device, including a laser light source for emitting laser light, including a light splitting device, located on the laser light path, the light splitting device reflects part of the laser light to form a first laser light, and transmits a part of the laser light to form a second laser light, the first laser light The optical path where the laser is located is the first optical path, and the optical path where the second laser is located is the second optical path; a wavelength conversion device is located on the first optical path, and is used for receiving the first laser light and converting at least part of the first laser light into different wavelengths. After the light is emitted, the first light emerges, the wavelength conversion device reflects the first light back to the spectroscopic device, and the spectroscopic device partially transmits the first light; it includes a scattering reflection device, which is located on the second optical path and is used to convert the second laser light into different laser beams. The second light distributed by the light distribution is reflected back to the light splitting device, and the light splitting device partially reflects the second light; the first light transmitted by the light splitting device and the second light reflected by the light splitting device are combined into one beam and exit.

Preferably, the spectroscopic device includes two or more transparent sheets arranged in layers.

Preferably, the spectroscopic device includes a first region and a second region, the first region partially transmits the laser light and partially reflects the laser light, and the second region transmits the first light and reflects the second light.

The present invention also provides a lighting device, including the light source device described in any one of the above.

Compared with the prior art, the present invention includes the following beneficial effects:

By arranging a beam splitting device on the laser light path that can both transmit part of the laser light and reflect part of the laser light, the laser light is guided and incident on the wavelength conversion device and the scattering reflection device respectively, and converted into first light and second light respectively. The device combines the first light and the second light and emits light, so that the light splitting device can emit both the first light and the second light in any area on the outgoing light path, avoiding the need for the light splitting device in the prior art. The selective transmittance has an adverse effect on the uniformity of the final output light, thereby improving the uniformity of the light output of the light source.

Description of drawings

FIG. 1 is a schematic structural diagram of a light source device according to Embodiment 1 of the present invention;

2 is a schematic structural diagram of a spectroscopic device of a light source device in Embodiment 1 of the present invention;

3 is a schematic structural diagram of a light source device according to Embodiment 2 of the present invention;

4 is a schematic structural diagram of a light splitting device of a light source device in Embodiment 2 of the present invention;

5 is a schematic structural diagram of a light source device according to Embodiment 3 of the present invention;

FIG. 6 is a schematic structural diagram of a light source device according to Embodiment 4 of the present invention.

Detailed ways

The specific embodiment of the present invention provides a light source device with good uniformity and high brightness: including a laser light source for emitting laser light, including a light splitting device, located on the laser light path, and the light splitting device transmits part of the laser light to form a first laser light , and reflect part of the laser to form a second laser, the optical path where the first laser is located is the first optical path, and the optical path where the second laser is located is the second optical path; including a wavelength conversion device, located on the first optical path, for receiving the first laser, After converting at least part of the first laser light into light of different wavelengths, the first light is formed, and the wavelength conversion device reflects the first light back to the spectroscopic device, and the spectroscopic device partially reflects the first light; including a scattering reflection device, located in the second light On the optical path, it is used to convert the second laser light into second light with different light distribution, and reflect the second light back to the light splitting device, and the light splitting device partially transmits the second light; the first light reflected by the light splitting device and the light splitting device The transmitted second light is combined into an exit beam.

Unlike some spectroscopic devices in the prior art, in the spectroscopic device of the present invention, the region that can both transmit laser light and reflect laser light is not distinguished by arranging two different sub-regions in this part to distinguish transmitted laser light and reflected laser light, that is, This area achieves the effect of transmission and reflection through the same area of the same structure, and the spectral characteristics of the first laser and the second laser are basically the same ("the same substrate" here means the same within the detection error range). Therefore, the spectroscopic device can emit light having the same spectrum as the laser light emitted by the laser light source in any region on the output optical path. However, in the light splitting device in the prior art, there are always some areas that cannot emit laser light, which will lead to an area of uneven color in the entire section of the emitted light, which will have a huge adverse effect on image display.

Therefore, the present invention utilizes the special design of the spectroscopic device, neither the wavelength-selective characteristic light-splitting nor the region-selective characteristic geometrical light-splitting is used, so that both part of the laser light is transmitted and part of the laser light is reflected, and finally the effect of uniform output light is achieved, All technical solutions of the present invention are implemented under this inventive concept.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

Example 1

Please refer to FIG. 1 , which is a schematic structural diagram of Embodiment 1 of the present invention. As shown in the figure, the light source device 100 includes a laser light source 101 , a spectroscopic device 105 , a wavelength conversion device 109 and a scattering reflection device 107 . The laser light source 101 is used for emitting laser light, the spectroscopic device 105 is located on the laser optical path, the spectroscopic device 105 transmits part of the laser light to form the first laser, and reflects part of the laser to form the second laser, the optical path where the first laser is located is the first optical path, the second laser The optical path where the laser is located is the second optical path. The wavelength conversion device 109 is located on the first optical path, and is used for converting at least part of the first laser light into light of different wavelengths to form the first light output after receiving the first laser light, and the scattering reflection device 107 is located on the second optical path for converting the The second laser light is converted into a second light with a different light distribution. The wavelength conversion device 109 and the scattering reflection device 107 respectively reflect the first light and the second light to the spectroscopic device, the spectroscopic device 105 partially reflects the first light and partially transmits the second light, and the first light reflected by the spectroscopic device 105 and the split light The second light transmitted by the device 105 is combined into one output beam.

In this embodiment, the laser light source 101 can be a laser light source, a laser diode light source, or a light source composed of a laser diode array. Any laser light source used in the prior art can be used as the laser light source of the present invention.

In this embodiment, the wavelength conversion device 109 is a reflective wavelength conversion device, that is, it includes a wavelength conversion layer and a reflection layer, wherein the reflection layer is located on the surface of the wavelength conversion layer away from the spectroscopic device. The wavelength conversion layer of the wavelength conversion device 109 absorbs the first laser light and converts the first laser light into received laser light with a wavelength different from the first laser light. (Of course, the present invention also includes the case where the first laser light is completely absorbed and converted into received laser light). The wavelength conversion layer includes phosphors, phosphorescent materials, and quantum dot light-emitting materials. In this embodiment, the laser light source is a blue light source, and the wavelength conversion device includes yellow phosphors (such as YAG phosphors). Of course, in other embodiments of the present invention, laser light sources with other wavelength ranges and wavelength conversion devices with other light-emitting characteristics can also be used, and are not limited to the technical solutions of the above-mentioned specific embodiments.

In this embodiment, the scattering reflection device 107 changes the light distribution of the incident laser light, and converts the Gaussian distribution laser light into the Lambertian distribution light, thereby improving the uniformity of the light and avoiding the speckle after the light is emitted. The scattering reflection device 107 includes a scattering material layer, and the scattering material layer includes one or more of aluminum oxide, titanium oxide, barium sulfate, yttrium oxide, zirconium oxide, and zinc oxide. Optionally, the scattering material layer can also be Including materials such as glass powder for bonding. The scattering material layer in this embodiment uses scattering particles with a wavelength similar to the laser light to perform scattering and reflection on the second laser light. In other embodiments of the present invention, the scattering reflection device 107 may also select a scattering surface with uneven surface. In order to enhance the reflection performance of the scattering reflection device 107 , a technical solution in which the scattering reflection layer and the specular reflection layer are stacked and combined can also be selected, which will not be repeated here.

In this embodiment, the wavelength conversion device 109 may be a fixed fluorescent powder sheet, or a rotatable fluorescent color wheel driven by a driving device such as a motor. The scattering reflection device 107 may also be a fixed scattering sheet or a rotatable scattering wheel, respectively.

In this embodiment, the laser light source 101 emits blue laser light, which is partially transmitted by the spectroscopic device and partially reflected by the spectroscopic device 105 . The second light is returned to the spectroscopic device 105 after being reflected by the scattering reflection device 107 . Finally, the yellow light reflected by the spectroscopic device 105 and the blue light of the second light transmitted through the spectroscopic device 105 are combined into white light.

In this embodiment, a light shaping device is also included, which is located on the laser optical path between the laser light source 101 and the beam splitting device 105 . The convex lens 102 converges the laser beam emitted by the laser light source 101, and then is collimated by the concave lens 103 to obtain a beam whose cross-sectional area is compressed and reduced. The compressed collimated beam is homogenized by the scattering sheet 104. Since the scattering characteristic of the scattering sheet 104 is rotationally symmetric, the light spot incident on the wavelength conversion device 109 and the scattering reflection device 107 is approximately circular. Through the light shaping device, a circular light spot with small divergence angle, uniform brightness and high brightness is obtained.

In this embodiment, it further includes a first focusing lens 108 located between the spectroscopic device 105 and the wavelength conversion device 109. The first focusing lens 108 further reduces the area of the light spot incident on the wavelength conversion device 109, and the small light spot is The etendue of the light generated by the wavelength conversion device 109 is small, so that the divergence angle of the final outgoing light is small. In the case where the beam divergence angle of the beam illuminating lamp is required to be small and the light energy is concentrated, the present invention can meet the needs of the beam illuminating lamp. . Further, it also includes a second focusing lens 106 located between the beam splitting device 105 and the scattering reflecting device 107 , the second focusing lens 106 further reduces the area of the light spot incident on the scattering reflecting device 107 , and the small light spot is on the scattering reflecting device 107 The etendue of the generated light is small, so that the divergence angle of the final outgoing light is small, and the present invention can meet the requirements of the beam illuminating lamp when the beam illuminating lamp has a small beam divergence angle and concentrated light energy.

In this embodiment, since the first laser light cannot be completely absorbed by the wavelength conversion device 109, the first light may include both the received laser light and the first laser light. When the first light is reflected by the wavelength conversion device 109 back to the spectroscopic device At 105 , the first laser light in the first light will be partially transmitted and partially reflected again, and part of the first laser light will be lost. Since there is less first laser light that is not absorbed by itself, it will not have a great influence on the outgoing light. Similarly, when the second laser light is converted into second light with different light distribution by the scattering reflection device 107 and is reflected back to the spectroscopic device 105, the second light is also partially transmitted and partially reflected. In practical applications, the proportion of blue light required for white light is less than that for yellow light. When the spectroscopic device 105 splits light for the first time, about 85% of the light is transmitted to form the first laser light, and 15% of the light is reflected to form the second laser light. In the rough model without considering the light loss, 15% of the second laser light is reflected by the scattering reflection device 107 and then incident on the beam splitting device 105 again, and 85% of which is transmitted, then the lost light only accounts for 2.25% of the original laser light source, which Compared with the technical solution of digging holes in the beam splitter in the prior art, the light loss has no obvious disadvantage. Since the light splitting device 105 is uniform as a whole, the first light reflected by the light splitting device 105 and the second light transmitted by the light splitting device 105 are respectively uniform in light distribution, and the combined light is also uniform in color.

In this embodiment, the light splitting device includes two or more transparent sheets arranged in layers. Please refer to FIG. 2 , which is a schematic structural diagram of the spectroscopic device 105 according to this embodiment. The spectroscopic device 105 in FIG. 2 includes two transparent sheets 1051 and 1052 . When the laser is incident on the transparent sheet, reflection and refraction occur at the same time on each surface of the transparent sheet, that is, the transmittance of the transparent sheet to the laser is not 100%. It is realized by using different transmissions in different regions of the light splitting device (for example, setting hollow areas). The light finally transmitted through the two transparent sheets is the first laser light, and the light finally reflected is the second laser light.

The present invention utilizes two or more transparent sheets stacked in layers, that is, the superposition of the function of partially reflecting light by the transparent sheets. Correspondingly, under the condition that the material of the transparent sheet remains unchanged, the more the transparent sheets are, the more the transparent sheets are reflected. The more light, the smaller the ratio of the luminous flux of the first laser to the second laser. In this way, the ratio of the first laser light to the second laser light can be easily adjusted.

In this embodiment, there is an air gap between the transparent sheet 1051 and the transparent sheet 1052 , and the air gap makes the phenomenon of reflection and refraction occur due to the difference in refractive index before and after the interface when light exits from the transparent sheet 1052 and light enters 1051 . If the transparent sheet 1051 and the transparent sheet 1052 are directly attached, it may cause the light to be directly transmitted from the transparent sheet 1052 into the 1051 without reflection and refraction. At this time, the transparent sheet 1051 and the transparent sheet 1052 are equivalent to a transparent sheet. The transflective function of the spectroscopic device 105 will be greatly reduced. In some cases, the present invention can also use only one transparent sheet as the spectroscopic device, which will require the material and internal structure of the transparent sheet, because it is difficult to obtain a spectroscopic device with a proper transmittance and reflectance through a single transparent sheet , this specific technology is not within the scope of discussion of the present invention, and the technical solution using materials and internal structures and the technical solution in which multiple transparent sheets are superimposed in this embodiment are two different sub-technical solutions. These two technical solutions All can be included in the inventive concept of the present invention.

In this embodiment, as shown in FIG. 2 , the spectroscopic device 105 further includes a filter film 1053 and an antireflection film 1054 . Wherein, the filter film 1053 is located on the surface of the first transparent sheet 1051, the first transparent sheet 1051 is the transparent sheet closest to the wavelength conversion device 109 among the transparent sheets, and the filter film 1053 is located on the first transparent sheet 1051 close to the wavelength conversion On the surface of the device 109; the anti-reflection film 1054 is located on the surface of the second transparent sheet 1052, the second transparent sheet 1052 is the transparent sheet farthest from the wavelength conversion device 109 among the transparent sheets, and the anti-reflection film 1054 is located on the second transparent sheet away from the surface of the wavelength conversion device 109 .

In this embodiment, the filter film 1053 can transmit the laser light, so that the first laser light is incident on the wavelength conversion device 109 through the light splitting device, and at the same time, the filter film 1053 can also reflect the first light emitted by the wavelength conversion device 109 and guide it. to the exit light path.

In this embodiment, the anti-reflection film 1054 enhances the transmission performance of the laser light, and adjusts the laser light transmission and reflection ratio of the spectroscopic device 105, so that the ratio of the first light and the second light in the outgoing light is controllable. In the present invention, adding an anti-reflection film 1054 is a preferred technical solution. Even if there is no anti-reflection film in the spectroscopic device 105, the functions of transmission and reflection can be realized.

Embodiment 2

Please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of a light source device according to Embodiment 2 of the present invention. The light source device 200 includes a laser light source 201 , a light splitting device 205 , a wavelength conversion device 209 and a scattering reflection device 207 . The difference between this embodiment and the first embodiment is that the light splitting device 205 is slightly different from the light splitting device 105 in the first embodiment.

As shown in FIG. 4 , FIG. 4 is a schematic structural diagram of the light splitting device 205 of the light source device 200 according to the second embodiment of the present invention. The spectroscopic device 205 includes a first area 2051 and a second area 2052 . The first region 2051 partially transmits the laser light and partially reflects the laser light, and the second region 2052 reflects the first light and transmits the second light.

In this embodiment, the first region 2051 of the spectroscopic device 205 is the same as the spectroscopic device 105 in the first embodiment, and the structure and function of the first region 2051 can be referred to the description of the spectroscopic device 105 in the foregoing embodiment. That is to say, the first area 2051 of the spectroscopic device 205 in this embodiment may also include two or more transparent sheets arranged in layers, with an air gap between the transparent sheets, and the first area 2051 may also include a filter film and antireflection coating.

In this embodiment, the second area 2052 is an area that combines light by utilizing wavelength characteristics. The first light (such as yellow light) from the wavelength conversion device 209 and the second light (such as blue light) from the scattering reflection device 207 are respectively incident from both sides of the second region 2052, the first light is reflected, and the second light is transmitted , so that the two beams of light are combined into one beam.

In the first embodiment, the spectroscopic device 105 has only one uniform area, while in this embodiment, the area of the first area 2051 is reduced relative to the spectroscopic device 105 , and a second area 2052 is arranged around the first area 2051 .

First, after the laser light generated by the laser light source 201 is shaped by the light shaping device, it is incident on the first area 2051 instead of the second area 2052, which greatly reduces the cross-sectional area of the light beam and facilitates the generation of small beams on the wavelength conversion device 109. spot.

Secondly, as described in the first embodiment above, the second light will be lost at the light splitting device 105. In this embodiment, after the second light is reflected by the scattering reflection device 207, it covers the first area 2051 and the second area 2052, Wherein, the second light incident on the first area 2051 produces the same light loss ratio as in the first embodiment, while the second light incident on the second area 2052 has a higher transmittance, thereby reducing the light of the second light loss.

Compared with the first embodiment, the design of the second embodiment is more complicated, but it also brings beneficial effects such as reducing light loss.

Embodiment 3

Please refer to FIG. 5 , which is a schematic structural diagram of a light source device according to Embodiment 3 of the present invention. The difference between this embodiment and the first embodiment is that the positions of the wavelength conversion device and the scattering reflection device are exchanged.

The light source device 300 in this embodiment includes a laser light source 301 , a light splitting device 305 , a wavelength conversion device 309 and a scattering reflection device 307 . The laser light source 301 is used to emit laser light, and the beam splitting device 305 is located on the laser optical path. The beam splitting device 305 reflects part of the laser light to form the first laser, and transmits part of the laser to form the second laser. The optical path where the first laser is located is the first optical path, and the second laser The optical path where the laser is located is the second optical path. The wavelength conversion device 309 is located on the first optical path, and is used for converting at least part of the first laser light into light of different wavelengths to form the first light output after receiving the first laser light, and the scattering reflection device 307 is located on the second optical path for converting the The second laser light is converted into a second light with a different light distribution. The wavelength conversion device 309 and the scattering reflection device 307 respectively reflect the first light and the second light to the spectroscopic device, the spectroscopic device 305 partially transmits the first light and partially reflects the second light, and the first light transmitted by the spectroscopic device 305 and the split light The second light reflected by the device 305 is combined into one beam to exit.

The transmission and reflection characteristics of the spectroscopic device 305 in this embodiment are just opposite to those of the spectroscopic device 105 in the first embodiment. In this embodiment, the light splitting device 305 includes two or more transparent sheets arranged in layers. In practical applications, more laser light is required to be reflected to the wavelength conversion device 309 , so the number of transparent sheets of the spectroscopic device 305 will be much larger than that of the first embodiment. This will bring about the problems of increased light loss (the light absorption rate cannot be 0), large structure volume, and increased optical path dislocation (optical path offset caused by refraction). This problem is not within the scope of the present invention and does not affect the present invention. Embodiments improve the effect of color uniformity of the emitted light.

For the description of other components in this embodiment, please refer to the description of Embodiment 1, and details are not repeated here.

Embodiment 4

Please refer to FIG. 6 , which is a schematic structural diagram of a light source device according to Embodiment 4 of the present invention. The difference between this embodiment and the second embodiment is that the positions of the wavelength conversion device and the scattering reflection device are exchanged.

The light source device 400 in this embodiment includes a laser light source 401 , a light splitting device 405 , a wavelength conversion device 409 and a scattering reflection device 407 . The laser light source 401 is used for emitting laser light, and the beam splitting device 405 is located on the laser optical path. The beam splitting device 405 reflects part of the laser light to form the first laser, and transmits part of the laser to form the second laser. The optical path where the first laser is located is the first optical path, and the second laser The optical path where the laser is located is the second optical path. The wavelength conversion device 409 is located on the first optical path, and is used for converting at least part of the first laser light into light of different wavelengths to form the first light output after receiving the first laser light, and the scattering reflection device 407 is located on the second optical path for converting the The second laser light is converted into a second light with a different light distribution. The wavelength conversion device 409 and the scattering reflection device 407 respectively reflect the first light and the second light to the spectroscopic device, the spectroscopic device 405 partially transmits the first light and partially reflects the second light, the first light transmitted by the spectroscopic device 405 and the split light The second light reflected by the device 405 is combined into one beam to exit.

Similar to the second embodiment, the spectroscopic device 405 of this embodiment also includes two regions, wherein the first region transmits part of the laser light and reflects part of the laser light, and the difference is that the second region transmits the first light and reflects the second light.

As described in the fifth embodiment, this embodiment also requires more laser light to be reflected by the first region to the wavelength conversion device 409. Under the condition that the material of the transparent sheet remains unchanged, the required number of transparent sheets is also more than that of the embodiment. Number of transparencies in two. However, the area of the first region in this embodiment is smaller than that of the spectroscopic device 305 in Embodiment 5, so the problems of large structure and optical path dislocation as described in Embodiment 5 are not too serious in this embodiment.

For descriptions of other components in this embodiment, please refer to the descriptions of Embodiment 2, and details are not repeated here.

Yet another embodiment of the present invention further provides an illuminating device, including the light source device of any of the above embodiments, and further including a lens group and other components arranged on the light path of the outgoing light of the spectroscopic device.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (8)

1. A light source device comprising a laser light source for emitting laser light, characterized in that: It includes a light splitting device, located on the laser light path, the light splitting device transmits part of the laser light to form a first laser, and reflects part of the laser to form a second laser, the optical path where the first laser is located is the first optical path, and the optical path where the second laser is located is the second optical path , the spectroscopic device includes two or more transparent sheets arranged in layers, the spectroscopic device utilizes the properties of the transparent sheet to reflect and refract light at the same time and the superposition of functions, so that the material of the transparent sheet remains unchanged. Next, adjust the ratio of the first laser to the second laser by adjusting the number of the transparent sheets; It includes a wavelength conversion device, located on the first optical path, for receiving the first laser light and converting at least part of the first laser light into light of different wavelengths to form a first light output, and the wavelength conversion device converts the first light the light is reflected back to the light splitting device, the light splitting device partially reflects the first light; Including a scattering reflection device, located on the second optical path, for converting the second laser light into second light with different light distribution, and reflecting the second light back to the light splitting device, the light splitting device is partially transmitted second light; The first light reflected by the light splitting device and the second light transmitted by the light splitting device are combined into one beam and emitted. 2 . The light source device according to claim 1 , characterized in that it comprises a light shaping device located on the laser light path between the laser light source and the light splitting device, and the light shaping device is in sequence along the direction of the laser light path. 3 . Including convex lens, concave lens and diffuser. 3 . The light source device according to claim 1 , wherein an air gap is formed between the transparent sheets. 4 . 4 . The light source device according to claim 1 , wherein the light splitting device comprises a first transparent sheet, and the first transparent sheet is the transparent sheet closest to the wavelength conversion device among the transparent sheets, and the The spectroscopic device further includes a filter film, the filter film is located on the surface of the first transparent sheet close to the wavelength conversion device, and the filter film transmits the laser light and reflects the first light. 5 . The light source device according to claim 1 , wherein the light splitting device comprises a second transparent sheet, and the second transparent sheet is the transparent sheet farthest from the wavelength conversion device among the transparent sheets, so the light source device according to claim 1 . The spectroscopic device further includes an anti-reflection film, the anti-reflection film is located on the surface of the second transparent sheet away from the wavelength conversion device. 6 . The light source device according to claim 1 , wherein the wavelength conversion device comprises a fixed fluorescent powder sheet or a rotatable fluorescent color wheel. 7 . 7. A light source device comprising a laser light source for emitting laser light, characterized in that: It includes a light splitting device, which is located on the laser light path. The light splitting device reflects part of the laser light to form a first laser light, and transmits a part of the laser light to form a second laser light. , the spectroscopic device includes two or more transparent sheets arranged in layers, the spectroscopic device utilizes the properties of the transparent sheet to reflect and refract light at the same time and the superposition of functions, so that the material of the transparent sheet remains unchanged. Next, adjust the ratio of the first laser to the second laser by adjusting the number of the transparent sheets; It includes a wavelength conversion device, located on the first optical path, for receiving the first laser light and converting at least part of the first laser light into light of different wavelengths to form a first light output, and the wavelength conversion device converts the first light the light is reflected back to the light splitting device, the light splitting device partially transmits the first light; Including a scattering reflection device, located on the second optical path, for converting the second laser light into second light with different light distribution, and reflecting the second light back to the light splitting device, the light splitting device partially reflects second light; The first light transmitted by the light splitting device and the second light reflected by the light splitting device are combined into one beam and emitted. 8. A lighting device, comprising the light source device according to any one of claims 1-7.

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