JP4716202B2 - Imaging device and operation input device - Google Patents

Description

  The present invention relates to an imaging device and an operation input device.

  Today, there are various input devices for various devices. As one of them, there is a prompter type operation input device disclosed in Patent Document 1 below. The mechanism of the device is as follows. In this apparatus, an input is made by touching the operation surface with a finger of the operator, but the operation surface is formed of a transparent sheet, and an illumination device and an imaging device on the opposite side of the operator with respect to the operation surface There is. The operator's hand (or finger) touching the operation surface is illuminated by the illumination device, the image of the hand (or finger) is taken by the imaging device, and the operator's input is analyzed by analyzing the image Determine the contents.

  For example, Patent Document 2 below discloses a hand image recognition system that can be used with a prompter-type operation input device. In this document, a hand area extraction image and a hand area thin line image are generated from an input image from a camera, and the hand area extraction image shows an apparent feature such as a finger thickness, and the hand area thin line image indicates a hand direction. The instruction input is specified by extracting the finger coordinates and the like.

JP 2007-272596 A JP 2003-346162 A

  However, when the camera and the LED are coaxial with each other as in the prior art, there is a problem that the image of the light source in the illumination device is reflected in the captured image. That is, in the prior art, the operation surface 11, the camera 20, and the illumination device 30 (for example, an infrared LED) are arranged in the housing 10, and the operation surface 11 is irradiated by the illumination device 30 to the operation surface 11 from above in the figure. An image of the touching operator's hand H is taken by the camera 20, and at this time, as shown by a dotted line in FIG. 11A, the light irradiated from the illumination device 30 and reflected on the operation surface 11. (Or infrared rays) enters the camera 20.

  As a result, as shown in FIG. 11B, the image 102 of the light source is reflected in the photographed image 100 together with the hand image 101. Therefore, when analyzing the image and specifying the operation content, the accuracy of the image analysis may be reduced.

  Accordingly, in view of the above problems, the problem to be solved by the present invention is an imaging apparatus or an operation input that includes a light source and an imaging unit inside the apparatus and photographs a target outside the apparatus through a transmission surface that transmits light from the light source. It is an object of the present invention to provide an imaging device that avoids reflection of a light source and an operation input device using the same.

Means for Solving the Problems and Effects of the Invention

In order to solve the above-described problem, an imaging apparatus according to the present invention includes a housing having a transmission surface that transmits light of at least a specific wavelength on at least one surface, and is disposed inside the housing. An illumination unit that emits light to an imaging target outside the housing through a transmission surface; an imaging unit that is disposed inside the housing and captures an image of the imaging target irradiated by the illumination unit; wherein the illumination unit sets an optical path of light emitted from the illumination unit so that the light reflected by the transmission surface is irradiated is not incident to the imaging unit from the illumination unit, the illumination unit A light source that emits light of the specific wavelength, and an optical path changing body that is arranged on an optical path that is irradiated from the light source, reflected by the transmission surface and incident on the imaging unit, and changes an optical path, The optical path changing body is irradiated from the light source. Wherein the is reflected by the transmissive surface is arranged on an optical path incident to the image sensing unit is a refractor for changing the optical path by refracting light.

  With this, in the imaging apparatus according to the present invention, when the imaging unit irradiates light to the imaging target outside the housing through the transmission surface by the illumination unit and shoots by the imaging unit, the light irradiated from the illumination unit and reflected by the transmission surface is reflected. Since the illumination unit sets the optical path of the light so that it does not enter the imaging unit, it is possible to avoid the light source from appearing in the image to be imaged and to obtain a good image.

  The illumination unit includes a light source that emits light of the specific wavelength, an optical path changing body that is arranged on an optical path that is irradiated from the light source, reflected by the transmission surface, and incident on the imaging unit, and changes an optical path; May be provided.

  Thereby, in the illumination unit, the optical path changing body is arranged on the optical path that is irradiated from the light source, reflected by the transmission surface, and incident on the imaging unit to change the optical path, so that the light irradiated from the illumination unit and reflected by the transmission surface Can reliably change the optical path of the light so as not to enter the imaging unit. Therefore, it is possible to capture a good image of the imaging target in which the light path is changed and the light source is prevented from being reflected.

  The optical path changing body may be a refracting body that is arranged on an optical path that is irradiated from the light source, reflected by the transmission surface and incident on the imaging unit, and refracts light to change the optical path.

  Thus, by arranging a refractor that refracts light on the optical path irradiated from the illumination unit, reflected from the transmission surface and incident on the imaging unit, the light irradiated from the illumination unit and reflected by the transmission surface is directed to the imaging unit. The optical path of light can be changed reliably so that it does not enter. Therefore, it is possible to take a good image of the imaging target in which the light path is changed by the refractor and the light source is prevented from being reflected.

  The optical path changing body may be a reflector that changes the optical path by reflecting the light that is disposed on the optical path that is irradiated from the light source, reflected by the transmission surface, and incident on the imaging unit.

  Thus, by arranging a reflector that reflects light on the optical path that is irradiated from the illumination unit, reflected from the transmission surface, and incident on the imaging unit, the light irradiated from the illumination unit and reflected by the transmission surface is directed to the imaging unit. The optical path of light can be changed reliably so that it does not enter. Therefore, it is possible to take a good image of the imaging target in which the light path is changed by the reflector and the light source is prevented from being reflected.

  The optical path changing body may be a shielding body that is arranged on an optical path that is irradiated from the light source, reflected by the transmission surface, and incident on the imaging unit to shield the light, thereby changing the optical path.

  Accordingly, the light that is irradiated from the illumination unit and reflected by the transmission surface is transmitted to the imaging unit by arranging the shielding body that shields light on the optical path that is irradiated from the illumination unit, reflected from the transmission surface, and incident on the imaging unit. The optical path of light can be changed reliably so that it does not enter. Therefore, it is possible to take a good image of the imaging target in which the light path is changed by the shield and the light source is prevented from being reflected.

  The optical path changing body is disposed on an optical path that is irradiated from the light source, reflected by the transmission surface, and incident on the imaging unit, and performs a combination of at least two of light refraction, reflection, and shielding. The optical path may be changed with.

  By arranging an optical path changing body that performs a combination of at least two of refraction, reflection, and shielding that shields light on the optical path that is irradiated from the illumination unit, reflected by the transmission surface, and incident on the imaging unit, The optical path of the light can be reliably changed so that the light irradiated from the illumination unit and reflected by the transmission surface does not enter the imaging unit. Therefore, it is possible to take a good image of the imaging target in which the light path is changed by the light path changing body and the light source is prevented from being reflected.

  The optical path changing body may be a transparent structure having at least a certain optical path changing function, which is partially different in thickness and shape.

  As a result, the optical path changing body is partially different in thickness and shape and has an optical path changing function. For example, the optical path of the light emitted from the light source can be refracted using a prism as the optical path changing body. Therefore, for example, it is possible to change the optical path with a simple configuration using a prism and take a good image of the imaging target in which the light source is avoided from being reflected.

  The optical path changing body may set the degree of change of the optical path according to the curvature of the curved surface shape of the optical path changing body.

  Thus, the optical path changing body sets the degree of change of the optical path according to the curvature of the curved surface shape, so that the degree of change of the optical path can be set, for example, by designing the curved surface shape of the prism having the curved surface shape. Therefore, for example, with a simple configuration using a prism, a degree of change of the optical path can be set according to the shape of the prism, and a good image of the imaging target in which the light source is prevented from being reflected can be taken.

  The optical path changing body may set the degree of change of the optical path by a combination of members having different refractive indexes.

  As a result, the optical path changing body sets the degree of change of the optical path by a combination of members having different refractive indexes. For example, by using a plurality of prisms, by setting the degree of change of the optical path from the combination of the refractive indexes, the light source Therefore, it is possible to capture a good image of the imaging target in which the image is avoided.

  The illuminating unit includes a plurality of light sources, and the illuminating unit applies the one light source to a part to be imaged that is not irradiated with light emitted from one light source by setting an optical path. You may irradiate the light irradiated from other light sources.

  Thus, by using a plurality of light sources and changing the optical path, an area that is not irradiated with one light source is irradiated with another light source, so that an imaging target can be photographed without creating a blank area that is not irradiated with light. Therefore, it is possible to avoid a light source from being reflected in an image to be imaged without creating a blank area that is not irradiated with light.

  Further, the illumination unit includes a light source that emits light of the specific wavelength, and the illumination unit does not receive light that is emitted from the light source and reflected by the transmission surface in the housing. The light source may be arranged such that the axis of the light source is inclined at an angle.

  As a result, the light source is arranged so that the light source axis is inclined at an angle at which the light irradiated from the light source and reflected by the transmission surface does not enter the imaging unit, so that the light source can be reflected by a simple method of tilting the light source axis. A good image of the imaging target that is avoided can be captured.

  The operation input device of the present invention is an operation input device including the above-described imaging device, wherein the transmission surface is an operation input surface for receiving an operation input from an operator, and the imaging target is an operation It is a hand of an operator who performs input, and includes an analysis unit that analyzes an image captured by the imaging unit and analyzes an operation content.

  Thereby, in the operation input device of the present invention, through the transparent operation input surface for receiving the operation input from the operator, light is emitted from the illumination unit inside the housing toward the operator's hand to display the image of the hand. When photographing, the light path is changed so that the light source does not appear in the image, so that the operation content of the operator can be specified with high accuracy. Therefore, an operation input device that can be operated with high accuracy according to the intention of the operator can be realized.

  Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 1 is a schematic configuration diagram of an operation input device 1 according to the present invention.

  The operation input device 1 is a so-called prompter type operation input device 1 (operation device, remote operation device). FIG. 1 shows a perspective view, an AA sectional view, and a BB sectional view of the operation input device 1.

  The operating device 1 includes a camera 20 (imaging device, imaging unit) and an illumination unit 70 in a housing 10. One surface 11 (upper surface in FIG. 1) of the rectangular parallelepiped housing 10 is an operation surface that receives an input from the operator. The illumination unit 70 is configured to irradiate the operation surface 11 so that there is no reflection of the light source in the imaging as described above, and includes the infrared LED 30 (LED, light source) and the refractor 40. The operation surface 11 may be made of a transparent sheet. Here, transparent is not necessarily colorless and transparent, for example, a colored transparent member that is transparent to light of a specific wavelength (which may appear opaque to humans), such as a resin filter that transmits only infrared light Good.

  If the operator cannot see the inside of the device, the operator does not feel uncomfortable, and the aesthetics of the device may be better. Therefore, the operation surface 11 is colored and transparent so that the inside of the operation device 1 such as the camera 20 from the operator. It is suitable if it is difficult to see (or cannot be seen). The camera 20 is arranged with the lens facing upward in the drawing of FIG.

  As shown in the BB sectional view, six LEDs 30 are arranged at a position surrounding the camera 20. The LED 30 emits infrared rays, for example, near infrared rays. If the operation surface 11 has a function of transmitting only infrared rays and not transmitting visible light, it is preferable from the viewpoint of aesthetics of the operation device 1 as described above. In FIG. 1, since the axes of the substantially cylindrical camera 20 and the LED 30 are in the same direction, they are in a so-called coaxial arrangement. Therefore, the infrared rays from the LED 30 are efficiently emitted toward the operation surface 11.

  The operating device 1 is connected to a control unit 2 (analysis unit). Further, the control unit 2 is connected to the operation target 3. The control unit 2 has a structure of a normal computer including a CPU that performs information processing, a RAM as a work area therefor, or a circuit board that includes a microcomputer or the like and has a similar function. There may be. The operation target 3 includes a display unit 3a (for example, a liquid crystal display). Various operation buttons of the operation target 3 are displayed on the display unit 3a.

  As in FIG. 11A, the operator operates the operation target 3 by touching the operation surface 11 from the outside of the housing 10. The details are as follows. Infrared rays emitted from the infrared LED 30 pass through the operation surface 11 and are applied to the hand H (or finger) of the operator who touches the operation surface 11. An infrared image of the operator's hand irradiated with infrared rays is taken by the camera 20. If the camera 20 is provided with a lens having a filter that transmits only infrared rays, it is preferable because it does not hinder the photographing of hand images even if the surroundings are bright.

  An image photographed by the camera 20 is transmitted to the control unit 2 and analyzed by an analysis program stored in advance by the control unit 2. At that time, it is considered that the operation surface 11 corresponds to the display unit 3a. That is, when the operator's hand H touches a position on the operation surface 11 corresponding to the operation button displayed on the display unit 3a, the control unit 2 determines that an operation input for pressing the operation button has been made. Thereby, the operation input of the operator is specified, and the operation target 3 is operated according to the content of the operation input.

  In the present invention, for example, the operation target 3 may be an in-vehicle device such as a vehicle navigation device, a vehicle air-conditioning device, an audio device, and a video device, and the operation device 1 may be installed in an automobile. In this case, the display unit 3a of the operation target 3 may be disposed, for example, on the instrument panel, and the operation surface 11 may be disposed, for example, on the center console portion of the vehicle. Since the camera 20 and the LED 30 are coaxially arranged as described above, the operating device 1 can be made compact, but this is suitable as a vehicle-mounted device with a limited installation space.

  As described above, in the related art, the infrared rays emitted from the LED 30 are reflected by the operation surface 11 and incident on the camera 20 and appear in the infrared image of the hand. This defect is eliminated. The refractive body 40 has a function of refracting transmitted light (electromagnetic wave). Specifically, the refracting body 40 may be a prism, for example. The material of the prism may be, for example, glass, crystal, or resin (for example, acrylic). As shown in FIG. 1, in the operating device 1, the refracting body 40 is arranged in a pair of parallel straight lines on the left and right sides of the figure with the camera 20 in between.

  FIG. 2 is a diagram illustrating an infrared light path in the AA cross-sectional view of FIG. 1. An infrared optical path (or a collection of optical paths) irradiated from the LED 30 of FIG. 2 is shown. A dotted line 53 in FIG. 2 is an optical path that is reflected by the operation surface 11 out of the infrared rays emitted from the LED 30 and enters the camera 20 when there is no refractor 40.

  As shown in FIG. 2, the optical path passing through the refracting body 40 is refracted to deviate from the optical path indicated by the dotted line 53. Thereby, even if infrared rays are reflected by the operation surface 11, the reflected light does not enter the camera 20. Therefore, the light source is not reflected in the photographed image of the hand, and the hand image analysis can be performed with high accuracy. As shown in FIG. 1, the refracting body 40 is formed with a curved surface on the surface facing the camera 20. What is necessary is just to design the curved-surface shape in the refractive body 40 so that the refracted optical path which satisfy | fills the said objective may be obtained.

  Only one of the two optical paths is refracted by the refractor 40, thereby generating a blank area 52 where the infrared rays from the LED 30 on the left side of the figure are not irradiated. However, as shown in FIG. 2, the blank area 52 is irradiated with infrared rays from the right LED 30 in the drawing. As a result, there is no region on the operation surface 11 where infrared rays are not irradiated. Therefore, an image of the operator's hand can be taken without a blank area.

  The number and arrangement of the refractors 40 and the LEDs 30 in the present invention are not limited to the example in FIG. 1 as long as the condition that the image of the light source is not captured by the camera 20 is satisfied. Another example is shown in FIG. 3A and 3B correspond to the BB cross-sectional view of FIG. In FIG. 3A, the refracting body 41 is disposed in a cylindrical shape surrounding the camera 20, and the illumination unit 71 includes the LED 30 and the refracting body 41.

  In FIG. 3B, a plurality of refracting bodies 42 are disposed at a position between the camera 20 and the LED 30 so as to surround the camera 20, and the illumination unit 72 includes the LED 30 and the refracting body 42. Yes. Each refracting body 42 has a columnar shape, and the arrangement of FIGS. 3A and 3B also refracts the optical path of infrared rays emitted from the LED 30 in the same manner as in FIG. Can be avoided. The surfaces of the refractors 41 and 42 facing the camera 20 are curved like the refractor 40. The curved surface shape may be designed so that the optical path is such that the image of the light source can be avoided in the captured image of the camera 20.

  Although FIGS. 1 to 3 show an embodiment using a refracting body, the present invention is not limited to this, and can be realized by a shielding body that shields light or a reflecting body that reflects light. Such an embodiment is shown in FIGS.

  In FIG. 4, a shield 50 is used. 4A shows a cross-sectional view of the operating device 1 using the shield 50, and FIG. 4B shows a perspective view of the shield 50. As shown in FIG. In FIG. 4A and FIGS. 5 to 8 described later, the omitted right side in the drawing may be configured symmetrically with the left side in the drawing. In FIG. 4, the illumination unit 73 includes the LED 30 and the shield 50. The shield 50 includes a hole 50a, allows the infrared rays from the LED 30 to pass through the hole 50a, and shields the other portions.

  FIG. 5 shows an example using the reflector 60. The illumination unit 74 includes the LED 30 and the reflector 60. The optical path is divided into two by the two reflectors 60, and infrared rays are reflected twice in one optical path.

  FIG. 6 shows an example using the refractor 43 and the shield 51. The illumination unit 75 includes an LED 30, a refracting body 43, and a shielding body 51. As shown in FIG. 6, the shield 51 is fixed to a portion near the upper end of the refracting body 43 in the figure. A part of the infrared ray irradiated from the LED 30 is refracted by the refracting body 43 and another part is shielded by the shielding body 51 to divide the optical path into two.

  FIG. 7 shows an example using the refracting body 44 and the reflecting body 61. The illumination unit 76 includes the LED 30, the refracting body 44, and the reflecting body 61. As shown in FIG. 7, the reflector 61 is fixed to a portion near the upper end of the refracting body 44 in the figure. A part of the infrared ray irradiated from the LED 30 is refracted by the refractor 44, and another part is shielded by the reflector 61 to divide the optical path into two.

  FIG. 8 shows an example using two refractors 45 and 46. The illumination unit 77 includes an LED 30 and refractors 45 and 46. As shown in FIG. 6, the refracting body 45 is disposed in contact with the refracting body 46. The refracting body 45 and the refracting body 46 are made of materials having different refractive indexes. The infrared ray emitted from the LED 30 is partially refracted by the two refractors 45 and 46 to divide the optical path into two.

  As described above, the configuration of FIGS. 4 to 8 forms an optical path that can avoid the image of the LED 30 being captured by the imaging unit 20 as in the optical path of FIG. In order to satisfy this object, the arrangement position and size of various refractors, shields, and reflectors in FIGS. 4 to 8 and the refractive index of the refractors may be set. 4 to 8 may be the same as the cross-sectional view taken along the line BB of FIG. 1 and FIGS. 3 (a) and 3 (b).

  The LED 30 may not be an infrared LED, but may be another LED, an LED that emits visible light, or an illumination device other than the LED. The camera 20 may be any imaging device that can capture the light emitted by the illumination device 30, and the refractors 40, 41, and 42 may have a function of refracting the light emitted by the illumination device 30.

  Therefore, the refractors 40, 41, and 42 do not have to be prisms as long as they can refract the light emitted by the illumination device 30, and are, for example, sheets that have a function of refracting light, which is created by microfabrication using MEMS (Micro Electro Mechanical Systems) Also good.

  An example using a sheet created by MEMS is shown in FIG. The upper drawing in FIG. 6 corresponds to the BB cross-sectional view in FIG. In the example of FIG. 9, two sheets 47 and 47 created by MEMS are arranged in parallel with the bottom surface of the housing 10. The infrared rays passing through the sheets 47 and 47 are refracted in the same manner as in FIG. Thereby, it is possible to avoid the infrared rays from the light source being reflected on the operation surface 11 and entering the camera 20. In addition, the sheet | seat produced by MEMS may be arrange | positioned at the disk shape surrounding the camera 20. FIG.

  FIG. 10 shows another embodiment of the present invention. Although the embodiment in which the LED 30 and the camera 20 are coaxial is shown above, in the embodiment of FIG. 10, the LED 30 and the camera 20 are arranged non-coaxially. The illumination unit 79 includes an LED 30 and a pedestal 31. As shown in FIG. 10, the pedestal 31 is fixed at the end of the bottom surface of the housing 10 so as to lean against the wall surface. Then, infrared rays are irradiated in an oblique direction from the LED 30 fixed to the pedestal 31.

  As a result, as shown in FIG. 10, the infrared rays irradiated from the LED 30 and reflected by the operation surface 11 do not enter the camera 20. Therefore, the image of the light source is avoided from being captured. Instead of using the pedestal 31, the shape of the bottom surface or the like of the housing 10 may be used so that the LED 30 faces in a non-coaxial direction with the camera 20 so that the image of the light source is not captured.

  Note that the control unit 2 may synthesize (superimpose) the image of the hand (finger) photographed by the camera 20 with the various operation buttons and the like on the display unit 3a. In this case, since the operator can confirm on the display unit 3a where his / her hand (finger) is currently located, convenience is improved and the possibility of erroneous operation is also reduced. As a form of combining (superimposing) the image of the hand with the image of various operation buttons of the display unit 3a, the control unit 2 extracts only the outline of the hand (finger) by image analysis and displays it on the display unit 3a. Also good. Alternatively, the hand image may be converted (superimposed) and displayed on the display unit 3a after the control unit 2 converts the image of the hand into an image that is colored and transparent in the hand portion and a colorless and transparent portion in the portion other than the hand. Even in such a hand image synthesis (superimposition) display, the refraction of the optical path according to the present invention contributes to a clear display of the hand image.

  In the above description, the operation input by the operator is specified by image analysis in the control unit 2. However, in the present invention, the operation surface 11 may be a touch panel provided with a touch sensor. In this case, when the operator presses the operation surface 11 (touch panel), the coordinates pressed by the touch sensor are detected and the operation input is specified. Therefore, if the system is configured to display (overlapping) a hand image with various operation buttons on the display unit 3a, the current position of the operator's hand can be recognized by the combined (overlapping) display, and the input position can be determined by the touch sensor. It becomes a complex system that can be identified.

The schematic block diagram of the operation input apparatus in one Embodiment of this invention. The figure which shows the optical path of infrared rays. The figure which shows arrangement | positioning of a refractive body. The figure which shows another Example. The figure which shows another Example. The figure which shows another Example. The figure which shows another Example. The figure which shows another Example. The figure which shows another example of a refractive body. The figure which shows another Example. The figure which shows the conventional operation input apparatus.

Explanation of symbols

1 Prompter type operation device (operation input device, operation device, imaging device)
10 Housing 11 Operation surface (transmission surface, operation input surface)
20 Camera (imaging part)
30 Infrared LED (LED, light source)
31 pedestal 40, 41, 42, 43, 44, 45, 46 Refraction body (optical path changing body, prism)
50, 51 Shield (light path changing body)
60, 61 Reflector (light path changing body)

Claims (9)

A housing having a transmissive surface that transmits at least light of a specific wavelength on at least one surface;
An illumination unit that is disposed inside the housing and irradiates light to an imaging target outside the housing through the transmission surface;
An imaging unit that is disposed inside the housing and captures an image of the imaging target irradiated by the illumination unit;
The illumination unit sets an optical path of the light emitted from the illumination unit so that the light emitted from the illumination unit and reflected by the transmission surface does not enter the imaging unit ,
The illumination unit is
A light source that emits light of the specific wavelength;
An optical path changing body that is arranged on an optical path that is irradiated from the light source, reflected by the transmission surface and incident on the imaging unit, and changes an optical path;
With
The optical path changing body is a refracting body that is arranged on an optical path that is irradiated from the light source, reflected by the transmission surface and incident on the imaging unit, and refracts light to change the optical path. apparatus. A housing having a transmissive surface that transmits at least light of a specific wavelength on at least one surface;
An illumination unit that is disposed inside the housing and irradiates light to an imaging target outside the housing through the transmission surface;
An imaging unit that is disposed inside the housing and captures an image of the imaging target irradiated by the illumination unit;
The illumination unit sets an optical path of the light emitted from the illumination unit so that the light emitted from the illumination unit and reflected by the transmission surface does not enter the imaging unit,
The illumination unit is
A light source that emits light of the specific wavelength;
An optical path changing body that is arranged on an optical path that is irradiated from the light source, reflected by the transmission surface and incident on the imaging unit, and changes an optical path;
Equipped with a,
The optical path changing body is a shielding body that is arranged on an optical path that is irradiated from the light source, reflected by the transmission surface, and incident on the imaging unit to shield the light, thereby changing the optical path. apparatus. A housing having a transmissive surface that transmits at least light of a specific wavelength on at least one surface;
An illumination unit that is disposed inside the housing and irradiates light to an imaging target outside the housing through the transmission surface;
An imaging unit that is disposed inside the housing and captures an image of the imaging target irradiated by the illumination unit;
The illumination unit sets an optical path of the light emitted from the illumination unit so that the light emitted from the illumination unit and reflected by the transmission surface does not enter the imaging unit,
The illumination unit is
A light source that emits light of the specific wavelength;
An optical path changing body that is arranged on an optical path that is irradiated from the light source, reflected by the transmission surface and incident on the imaging unit, and changes an optical path;
With
The optical path changing body is disposed on an optical path irradiated from the light source, reflected by the transmission surface and incident on the imaging unit, and changes the optical path by performing a combination of refraction and shielding on light. Imaging device. The imaging apparatus according to claim 1, wherein the optical path changing body is a transparent structure having a partially different thickness and shape . The imaging apparatus according to claim 4, wherein the optical path changing body sets a degree of change of the optical path according to a curvature of a curved surface shape of the optical path changing body . The imaging apparatus according to claim 1, wherein the optical path changing body sets a degree of change of the optical path by a combination of members having different refractive indexes . A housing having a transmissive surface that transmits at least light of a specific wavelength on at least one surface;
An illumination unit that is disposed inside the housing and irradiates light to an imaging target outside the housing through the transmission surface;
An imaging unit that is disposed inside the housing and captures an image of the imaging target irradiated by the illumination unit;
The illumination unit sets an optical path of the light emitted from the illumination unit so that the light emitted from the illumination unit and reflected by the transmission surface does not enter the imaging unit,
The illumination unit has a plurality of light sources,
The illumination unit irradiates light emitted from a light source other than the one light source to a part of the imaging target that is not irradiated with light emitted from one light source by setting an optical path. An imaging apparatus characterized by the above . A housing having a transmissive surface that transmits at least light of a specific wavelength on at least one surface;
An illumination unit that is disposed inside the housing and irradiates light to an imaging target outside the housing through the transmission surface;
An imaging unit that is disposed inside the housing and captures an image of the imaging target irradiated by the illumination unit;
The illumination unit sets an optical path of the light emitted from the illumination unit so that the light emitted from the illumination unit and reflected by the transmission surface does not enter the imaging unit,
The illumination unit is
A light source that emits light of the specific wavelength;
The illumination unit arranges the light source in the housing so that the light source axis is inclined at an angle at which light emitted from the light source and reflected by the transmission surface does not enter the imaging unit. An imaging device. An operation input device comprising the imaging device according to any one of claims 1 to 8,
The transparent surface is an operation input surface for receiving an operation input from an operator,
The imaging target is an operator's hand performing an operation input,
An operation input device comprising an analysis unit that analyzes an image captured by the imaging unit and analyzes an operation content .

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