JP3026653U - Optical remote control device - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To secure a sufficient working distance even when a bright light source exists obliquely above. An optical sensor unit of a remote control device incorporated in a camera includes a light transmission plate and an optical sensor.
In addition, the light transmitting plate 8 is made of acrylic or polycarbonate, and the thickness thereof gradually decreases upward to form a kind of prism. Therefore, the light such as sunlight that enters from diagonally above is
Compared to the case where the first surface 8A and the second surface 8B are parallel to each other, the total reflection on the second surface 8B becomes easier. As a result, even if the light is incident on the first surface at a smaller incident angle,
It is totally reflected on the second surface and is less likely to be affected by light from a light source obliquely above, such as the sun, and the working distance of the operation unit can be secured.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to an optical remote control device.

[0002]

[Prior art]

 For example, a silver salt film camera in which a shutter is released by remote control using infrared light is used. In this type of camera, as shown in FIG. 2, when the button 4A of the operation unit 4 is pressed at a position distant from the camera body 2, infrared light signal light L is emitted from the operation unit 4 in the form of pulse code, An optical sensor incorporated behind the remote control light receiving window 2A of the camera body 2 receives the signal light and outputs a corresponding electric signal. Then, when the optical sensor outputs the electric signal, the electronic circuit of the camera body 2 drives the shutter to open it.

[0003]

[Problems to be solved by the device]

 However, in such a conventional camera, when the camera body 2 is photographed toward a bright light source such as the sun, strong light from the light source is incident on the optical sensor of the remote control device. , The optical sensor is always sensitive to light. Therefore, in such a case, in order to perform remote control, it is necessary to make a strong signal light incident on the optical sensor, and in order to do so, the operation unit 4 must be brought close to the camera body 2 and operated, and the remote control This resulted in a shorter working distance. Further, when the optical sensor receives extremely strong light, the signal light from the operation unit cannot be compared with a predetermined threshold value to accurately identify the signal.

Therefore, an object of the present invention is to provide an optical remote control device capable of ensuring a sufficient working distance even when a bright light source is present obliquely above.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention comprises an operation unit that emits signal light, and an optical sensor that receives the signal light from the operation unit and outputs an electric signal corresponding to the signal light. In the optical remote control device, a light transmissive member through which light incident on the optical sensor passes is arranged in front of the light receiving portion of the optical sensor, and a first surface of the light transmissive member on the light incident side is arranged. The distance from the second surface of the light transmitting member on the light emitting side is gradually narrowed upward.

The present invention also includes an operation unit that emits signal light, and an optical sensor that receives the signal light from the operation unit and outputs an electrical signal corresponding to the signal light. In the optical remote control device, a light transmitting member through which light incident on the optical sensor passes is arranged in front of the light receiving portion of the light sensor, and the light transmitting portion includes the light transmitting member on the light incident side. Of the light incident on the light transmissive member by totally reflecting the light on the second surface of the light transmissive member. It is characterized in that light having a large incident angle is prevented from entering the light receiving portion.

The present invention is also characterized in that the light transmitting member is made of acrylic or polycarbonate. The present invention is also characterized in that the light transmitting member is made of acrylic, and an angle formed by the first surface and the second surface is about 17 °. The present invention is also characterized in that the light transmitting member is made of polycarbonate, and an angle formed by the first surface and the second surface is about 15 °. The present invention is also characterized in that the first surface is perpendicular to the center line of the optical sensor. The present invention is also characterized in that the signal light is infrared light. The present invention is also characterized in that the optical sensor is incorporated in a camera for recording an image on a silver salt photosensitive material. The present invention is also characterized in that the optical sensor is incorporated in a camera that converts light into an electric signal and magnetically records an image. The present invention is also characterized in that the optical sensor is incorporated into a camera which converts light into an electric signal and electrically records an image.

The present invention also includes an optical unit including an operation unit that emits a signal light, and an optical sensor that receives the signal light from the operation unit and outputs an electrical signal corresponding to the signal light. In the remote control device, a light transmitting member through which light incident on the light sensor passes is arranged in front of the light receiving portion of the light sensor, and the light transmitting member faces the light receiving portion of the light sensor. Of the light incident on the light transmitting member to prevent the light having a large incident angle from entering the light receiving portion.

[0009]

[Embodiment of device]

 Next, an embodiment of the present invention will be described. FIG. 1 is a block diagram showing an optical sensor unit constituting an optical remote control device according to the present invention. In this embodiment, the optical sensor unit 6 is incorporated in the main body of a camera of the same type as that shown in FIG. 2, and includes a light transmitting plate 8 and an optical sensor 10. The light transmitting plate 8 is fitted in a remote control light receiving window of the camera body (corresponding to the remote control light receiving window 2A in FIG. 2), and the optical sensor 10 sensitive to infrared light is behind the light transmitting plate 8. It is arranged at a predetermined interval therebetween. Specifically, the light transmitting plate 8 is made of acrylic or polycarbonate in this embodiment, and the thickness thereof gradually becomes thinner toward the upper side to form a kind of prism. That is, the first surface 8A on the outside of the light transmitting plate 8 on which light is incident and the second surface 8B on the side on which light is emitted are not parallel, and as shown in FIG. Is forming. In FIG. 1, the direction of arrow A coincides with the upper side of the camera body. In addition, in the present embodiment, the first surface 8A is perpendicular to the center line C of the optical sensor 10, and thus is parallel to the front surface 2C of the camera body 2.

The angle formed by the first surface 8A and the second surface 8B of the light transmitting plate 8 has the following values. First, in this embodiment, it is assumed that the sunlight S having an incident angle θ1 with respect to the first surface 8A of 40 ° or more does not enter the optical sensor 10. At this time, when the light transmitting plate 8 is made of acrylic resin, the refractive index of acrylic resin is 1. As shown in [Table 1]. 49, and the critical angle θ2 is 42.16 °.

[0011]

[Table 1] ┌──────────┬────┬──────┬───────┐ │ Light transmission plate │ Refractive index n │ Critical angle θ ₂ │ Prism apex σ │ ├──────────┼────┼──────┼───────┤ │acrylic PMMA │1.49│42.16 ° │ 16.6 ° │ ├──────────┼────┼──────┼───────┤ │Polycarbonate PC│1.59│38.98 ° │ 15.1 ° │ └──────────┴────┴──────┴───────┘ Therefore, when the incident angle θ1 is 40 °, the light is transmitted. In order to make the incident angle of the light passing through the plate 8 and reaching the second surface 8B to be the critical angle θ2, σ = θ2−θ1 ′, so σ is [Table 1]. It may be 16.6 ° as shown in FIG. That is, when σ is set to a value of about 17 °, and when the incident angle of sunlight is about 40 ° or more, the light transmitted through the light transmitting plate 8 has the second surface at the incident angle of the critical angle θ2 or more. 8B, and as a result, the light is totally reflected by the second surface 8B, does not go to the outside of the light transmitting plate 8 and does not enter the optical sensor 10. Note that θ1 ′ is calculated by the following equation. sin θ1 ′ = 1 / n · sin θ1

When shooting in the daytime except morning and evening, the incident angle of sunlight is approximately 40 ° or more. Therefore, when shooting in such a time zone, the optical remote control of the present embodiment is performed. In the control device, sunlight does not enter the optical sensor 10. Therefore, even if the operation unit 4 is separated from the camera body 2 and the optical signal of the infrared light incident on the optical sensor 10 is weak, the shutter of the camera is reliably released by the remote control without being disturbed by sunlight. be able to.

When the light transmitting plate 8 is made of polycarbonate, as shown in [Table 1], the refractive index is 1.59 and the critical angle is 38.98 °. The angle σ formed by the first surface 8A and the second surface 8B of the over plate 8 may be about 15 °. At this time, sunlight having an incident angle of about 40 ° or more does not enter the optical sensor 10.

Further, when photographing indoors, even when the ceiling illumination is strong, light with an incident angle of 40 ° or more does not reach the optical sensor 10, so a sufficient working distance of the operation unit can be secured. it can.

In the present embodiment, the optical remote control device according to the present invention is incorporated in the camera for recording an image on the silver salt film, but the optical remote control device according to the present invention controls the light It can of course be incorporated into a camera that converts signals into magnetic images, or a camera that converts light into electrical signals and records images electrically. It is possible to obtain the same effect by incorporating it into various devices using the control function.

[0016]

[Effect of device]

 As described above, the present invention includes an operation unit that emits signal light, and an optical sensor that receives the signal light from the operation unit and outputs an electric signal corresponding to the signal light. In the optical remote control device described above, a light transmitting member through which light incident on the optical sensor passes is arranged in front of the light receiving unit of the optical sensor, and the light receiving unit of the optical sensor of the light transmitting member is disposed. By totally reflecting the light on the side surface, out of the light entering the light transmitting member, the light having a large incident angle is prevented from entering the light receiving portion.

Therefore, even if there is a strong light source obliquely above, such as the sun or ceiling lighting, it is less likely to be affected by light from those light sources, and it is possible to secure a working distance of the operation unit.

[Brief description of drawings]

FIG. 1 is a block diagram showing an optical sensor unit constituting an example of an optical remote control device according to the present invention.

FIG. 2 is a perspective view showing an example of a camera capable of operating a shutter by remote control.

[Explanation of symbols]

 2 camera body 2A remote control light receiving window 4 operation unit 4A button 6 optical sensor section 8 light transmitting plate 8A first surface 8B second surface 10 optical sensor

Claims (11)

[Scope of utility model registration request] 1. An optical remote control device including an operation unit that emits signal light, and an optical sensor that receives the signal light from the operation unit and outputs an electric signal corresponding to the signal light. In the front of the light receiving part of the optical sensor, a light transmitting member through which the light incident on the optical sensor passes is arranged, and the first surface of the light transmitting member on the light incident side and the light emitting side. The optical remote control device is characterized in that the distance from the second surface of the light transmitting member is gradually narrowed upward. 2. An optical remote control device including an operation unit that emits signal light, and an optical sensor that receives the signal light from the operation unit and outputs an electrical signal corresponding to the signal light. In the front of the light receiving portion of the light sensor, a light transmitting member through which light incident on the light sensor passes is disposed, and the light transmitting portion is the first surface of the light transmitting member on the light incident side. , A second surface on the side from which light is emitted, and by totally reflecting the light on the second surface of the light transmitting member, the light having a large incident angle among the lights incident on the light transmitting member. The optical remote control device is characterized in that it is configured to prevent the light from entering the light receiving part. 3. The optical remote control device according to claim 1, wherein the light transmitting member is made of acrylic or polycarbonate. 4. The optical remote control device according to claim 1, wherein the light transmitting member is made of acrylic, and an angle formed by the first surface and the second surface is about 17 °. 5. The light transmitting member is made of polycarbonate, and an angle formed by the first surface and the second surface is approximately 1.
The optical remote control device according to claim 1, wherein the optical remote control device has an angle of 5 °. 6. The optical remote control device according to claim 1, wherein the first surface is perpendicular to a center line of the optical sensor. 7. The optical remote control device according to claim 1, wherein the signal light is infrared light. 8. The optical remote control device according to claim 1, wherein the optical sensor is incorporated in a camera that records an image on a silver salt photosensitive material. 9. The optical sensor converts light into an electrical signal,
The optical remote control device according to claim 1, which is incorporated in a camera that magnetically records an image. 10. The optical remote control device according to claim 1, wherein the optical sensor is incorporated in a camera that converts light into an electric signal and electrically records an image. 11. An optical remote control device including an operation unit which emits signal light, and an optical sensor which receives the signal light from the operation unit and outputs an electric signal corresponding to the signal light. In the front of the light receiving portion of the optical sensor, a light transmitting member through which the light incident on the optical sensor passes is disposed, and the surface of the light transmitting member on the light receiving portion side of the optical sensor is totally reflected. As a result, of the light incident on the light transmitting member, the light having a large incident angle is prevented from entering the light receiving unit.