JP2002152778A - Three-dimensional image detecting unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a three-dimensional(3D) image by mounting a 3D image detecting unit on a conventional camera. SOLUTION: A housing 30a of a 3D image detecting unit 230 is mounted on the top end of a lens-barrel part 13. When the release switch of a camera 9 is operated, a trigger signal is outputted from a hot shoe 11, and the trigger signal is inputted through a first transmitting cable 35 to the 3D image detecting unit 30. On the basis of the trigger signal, the detection of 3D image data is started in the 3D image detecting unit 30. The 3D image data are transferred through a second transmitting cable 36 to a camera 10. A positioning stay mechanism 20 is fixed on the camera body 10 and supports the housing 30a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional image detecting unit for detecting a three-dimensional shape of a subject by using a light propagation time measuring method.

[0002]

2. Description of the Related Art A conventional three-dimensional image detecting apparatus using a light propagation time measuring method irradiates a subject with pulse-modulated laser light, receives reflected light from the subject at a CCD, and
The three-dimensional shape of the subject is detected by detecting the distance to the subject for each pixel according to the amount of received light. At the time of this detection, a still image (two-dimensional image) representing the texture of the subject is also usually detected, and a three-dimensional image of the subject is generated by associating the two-dimensional image with the distance to the subject for each pixel. . Therefore, it is possible to use this device to capture only a two-dimensional image of a subject in the same manner as a still camera. However, in such a case, the size of the unit used for three-dimensional image detection is large, and portability is high. There is a problem that is not good.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a three-dimensional image detection unit detachable from a conventional digital still camera.

[0004]

The three-dimensional image detection unit according to the present invention can be mounted on the tip of a lens barrel of a camera.
A three-dimensional image detection unit for detecting three-dimensional image data, a light source unit for irradiating a subject with distance measuring light, a reflected light of the distance measuring light from the subject, and a distance to the subject according to the amount of received light. And a three-dimensional image detecting unit for detecting the three-dimensional image data of the subject by measuring the incident light, and dividing the light incident on the three-dimensional image detection unit into reflected light and light components other than the reflected light to guide the light into the camera. Light branching means.

[0005] Preferably, a detection operation interlocking unit is provided which causes the three-dimensional image detection unit to start detecting three-dimensional image data in conjunction with the image detection operation of the camera.

For example, the detection operation interlocking section starts detection of the three-dimensional image data based on a trigger signal output from the camera in response to operation of a release switch of the camera.

For example, the camera includes a hot shoe section for outputting a trigger signal, and the detecting operation interlocking section includes a first transmission cable for transmitting a trigger signal connectable to the hot shoe section.

[0008] For example, the camera includes a strobe section for irradiating the subject with flash light in response to the operation of a release switch, and the detecting operation interlocking section senses reflected light of the flash light and starts detection of three-dimensional image data. Let it.

[0009] Preferably, a three-dimensional image transfer unit for transferring the three-dimensional image data detected by the three-dimensional image detection unit to the camera is provided. More preferably, the camera includes an optional connector capable of inputting three-dimensional image data.
The two-dimensional image transfer unit includes a second transmission cable that transfers the three-dimensional image data connectable to the option connector.

[0010] Preferably, a positioning stay mechanism is provided which has a housing attached to the distal end of the lens barrel and is fixed to the camera and supports the housing. More preferably, the camera has a tripod mounting mechanism to which a tripod can be mounted, and the positioning stay mechanism includes a positioning stay fixing mechanism that can be fixed to the tripod mounting mechanism.

[0011] Preferably, the housing has a cylindrical housing along the outer periphery of the lens barrel, and the light source is disposed on the outer edge of the housing.

For example, the ranging light and the reflected light of the ranging light are infrared light components, and the incident light branching means selectively reflects the infrared light component and transmits light components other than the infrared light component. This is an infrared reflection mirror.

Preferably, the lens barrel has a screwing portion to which a filter can be mounted, and has a mounting mechanism that can be mounted to the screwing portion.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of a camera equipped with the three-dimensional image detection unit of the present embodiment.

The camera 9 is a conventionally known digital still camera for detecting a normal still image (two-dimensional image). A hot shoe 11 that can be connected to a trigger contact of a strobe (not shown) is provided on an upper surface of a camera body 10 having a substantially rectangular parallelepiped, and a serial communication used for data exchange with a personal computer or the like on a side surface, for example, An optional connector 12 such as a USB is provided.
The lens barrel 13 extends vertically from the front of the camera body 10,
A three-dimensional image detection unit 30 is attached to the tip of the lens barrel 13. Housing 30 of three-dimensional image unit 30
a is supported by a positioning stay mechanism 20 fixed to the camera body 10.

The housing 30a of the three-dimensional image detecting unit 30 is formed in a cylindrical shape to be fitted on the outer periphery of the lens barrel 13. A first infrared reflection mirror 33 is installed on the inner peripheral side of the housing 30a, and is inclined so as to reflect only an infrared component of light incident on the three-dimensional image detection unit 30 in a predetermined direction. A light source unit 31 is arranged on the front part of the housing 30a along a cylindrical outer edge, and a flash light detection unit 32 is provided below the light source unit 31. A liquid crystal display unit 34 is provided on the side surface.

The first and second transmission cables 35 and 36 extend from the back of the housing 30a. The first transmission cable 35 is connected to the hot shoe 11, and the second transmission cable 36 is connected to the option connector 12.

The positioning stay mechanism 2 will be described with reference to FIGS.
0 will be described. 2 and 3 schematically show how the three-dimensional image detection unit 30 is mounted on the camera 10 by the positioning stay mechanism 20. FIG. 2 is a side view and FIG. 3 is a bottom view. .

Usually, a screwing portion for mounting a filter or the like is formed at the tip of the lens barrel portion of the camera. The screwing portion is generally formed in a female screw shape, and a filter having a male screw connection portion, a lens hood, and the like are mounted thereon. In the present embodiment, a three-dimensional image detection unit is provided inside the three-dimensional image detection unit 30 by providing a male screw-shaped mounting mechanism that can be mounted to a female screw-shaped screwing part, and screwing this mounting mechanism to the screwed part. 30 is mounted on the camera 10. Since the screwing portion at the tip of the lens barrel is provided for mounting a filter, this configuration alone is not sufficient in strength to support the three-dimensional image unit 30 which is relatively heavy as compared with a filter or the like. Therefore, in the present embodiment, the positioning stay mechanism 20 is provided as follows,
The three-dimensional image detection unit 30 is supported.

The positioning stay mechanism 20 has a first positioning stay 21 and a second positioning stay 23.
The first positioning stay 21 extends along the lens barrel 13, and a three-dimensional image detection unit 30 attached to the tip of the lens barrel 13.
From the housing 30a to a position reaching the bottom surface of the camera body 10.

At the end of the first positioning stay 21 on the three-dimensional image detection unit 30 side, there is provided an upright portion 25 which is bent vertically upward with respect to the optical axis. The upright portion 25 is set at a position where it comes into contact with the housing 30a, and the first positioning screw 26 is inserted through the upright portion 25 in a direction perpendicular to the optical axis. The first positioning screw 26 is screwed to a screw insertion portion 37 provided in the housing 30a, whereby the first positioning stay 21 is fixed to the three-dimensional image detection unit 30. As shown in FIG. 4, the upright portion 25 is provided with an adjustment hole 25a extending in a direction perpendicular to the optical axis. The first positioning stay 21 is arranged parallel to the lens barrel 13 and the first positioning screw 26 is screwed to the screw insertion portion 37 according to the outer size of the camera body 10 and the like by the adjustment hole 25a.

A camera usually has a tripod screw insertion portion for mounting a tripod on the camera body. In this embodiment, the positioning stay mechanism 20 is fixed using the tripod screw insertion portion. Second positioning stay 2
3 extends along the bottom surface of the camera body 10. The second set screw 24 is moved upward in a direction perpendicular to the optical axis.
Of the positioning stay 23 is inserted. The second positioning screw 24 is screwed into the tripod screw insertion portion 14 of the camera body 10 to attach the second positioning stay 23 to the camera body 1.
Fix to 0. An adjusting hole 23a extending along the bottom of the camera is provided at the center of the second positioning stay 23.
Thereby, the position where the second positioning screw 24 is inserted is adjusted according to the position of the tripod screw insertion portion 14 of the camera body 10.

As described above, the first positioning stay 21 is fixed parallel to the optical axis, and the second positioning stay 2
3 is fixed parallel to the camera body 10. That is, the first positioning stay 21 and the second positioning stay 23 intersect at right angles. The first and second positioning stays 2
1 and 23 are connected by a connecting member 22 at the intersection.

As shown in FIG. 5, the coupling member 22 comprises a substantially square plate portion 27 and first and second curved portions 28 and 29. The first curved portions 28 are provided on a pair of two parallel sides of the plate portion 27 and are curved upward. A groove 28 a formed inside the curved portion 28 engages with the first positioning stay 21, and the coupling member 22 is slidable in the longitudinal direction of the first positioning stay 21. On the other hand, the second curved portion 29 is provided on another pair of two sides of the plate portion 27 where the first curved portion 28 is not provided, and is curved downward. The groove 29a formed by the second curved portion 29 engages with the second positioning stay 23,
The coupling member 22 is slidable in the longitudinal direction of the second positioning stay 23.

That is, the second member connected by the connecting member 22
The first and second positioning stays 21 and 23 can be moved back and forth in the direction of the optical axis while the first and second positioning stays 21 and 23 are coupled in a state orthogonal to each other. In the left and right directions.
By coupling the first and second positioning stays 21 and 23 in this manner, the lens barrel 13 with respect to the camera body 10 is moved.
And the position of the tripod screw insertion portion 14, the positioning stay mechanism 20 can be fixed.

When the first and second positioning stays 21 and 23 are joined by the joining member 22, the second positioning stay 23 fixed to the camera body 10 is moved to the first position.
And the first positioning stay 21 supports the three-dimensional image detection unit 30.

By using the positioning stay mechanism 20 as described above to support the relatively heavy three-dimensional image detection unit 30, it is possible to hold the three-dimensional image detection unit 30 mounted on the screwing portion. it can. The three-dimensional image detection unit 30 is mounted on the camera 10 using a screwing portion used for mounting a filter or the like, and the positioning stay mechanism 20 is fixed using the tripod screw insertion portion 14. That is, since the three-dimensional image unit 30 is attached to and fixed to the camera 10 using a configuration provided in a general camera, it is not necessary to add a special mechanism to the camera 9.
The three-dimensional image detection unit 30 can be mounted on a conventional camera.

FIG. 6 is a diagram schematically showing the arrangement of the light source 31 and the optical system in a state where the three-dimensional image detection unit 30 is mounted on the lens barrel 13. The light source unit 31 has a plurality of light emitting elements 31a, and an irradiation lens 31b is provided in front of each light emitting element 31a in the optical axis direction. This light emitting element 3
1a, the irradiation lens 31b is covered with the diffusion plate 38. The light emitting element 31a emits distance measuring light in the infrared wavelength range, and the emitted distance measuring light is diffused through the irradiation lens 31b and the diffusion plate 38, and is irradiated on the subject. As described above, the light source unit 31
Is disposed on the outer edge of the housing 30a formed in a cylindrical shape along the outer periphery of the lens barrel 13 (see FIG. 1). Therefore, the distance measurement light emitted from the light source unit 31 can irradiate the substantially same range as the shooting range of the two-dimensional image shooting lens 15 in the lens barrel 13. Although not shown in FIG. 6, a flash light detection unit 32 used in a light receiving trigger mode described later is provided below the light source unit 31 (FIG. 1).
reference).

Light incident on the three-dimensional image detection unit 30 is split by the first infrared reflection mirror 33. That is, the first infrared reflection mirror 33 outputs
It selectively reflects only light in the infrared wavelength range and transmits light outside the infrared wavelength range. The light reflected by the infrared reflecting mirror 33 enters the second infrared reflecting mirror 39. Light is second
Is reflected again by the infrared reflection mirror 39 of the CCD 41 through the photographing lens 40 in the three-dimensional image detection unit.
Is received. On the other hand, the first infrared reflection mirror 33
Is transmitted into the lens barrel 13, and the camera 9 detects a subject image via the two-dimensional image taking lens 15. As described above, the light incident on the three-dimensional image detection unit 30 is branched according to the wavelength range of the light, and received by the camera 9 and the three-dimensional image detection unit 30, respectively.

FIG. 7 is a block diagram showing a circuit configuration of the three-dimensional image detection unit 30. In FIG. 7, the second infrared reflection mirror and the photographing lens in the three-dimensional image detection unit are omitted. In a state where the three-dimensional image detection unit 30 is attached to the tip of the lens barrel 13,
The visible light component of the light that has entered the three-dimensional image detection unit 30 passes through the infrared reflection mirror 33 and enters the camera 9 via the two-dimensional image taking lens 15. The visible light component is received by an image pickup device (not shown) in the camera body 10 to detect a two-dimensional image.

The light in the infrared wavelength range among the light incident on the three-dimensional image detection unit 30 is reflected by the first infrared reflection mirror 33 and received by the CCD 41. CCD 41
In this case, electric charges are generated according to the amount of received light. Operations such as charge accumulation operation and charge readout operation in the CCD 41 are controlled by the CCD drive circuit 42. The charge signal read from the CCD 41, that is, the image signal, is amplified by the amplifier 43, and is converted from an analog signal to a digital image signal by the A / D converter 44. The digital image signal is subjected to processing such as gamma correction in the imaging signal processing circuit 45 and temporarily stored in the image memory 46. The CCD drive circuit 42 and the imaging signal processing circuit 45 are controlled by a system control circuit 47.

The system control circuit 47 is connected to the interface circuit 48,
Is connected to the interface connector 49. The image signal read from the image memory 46 is transmitted via the interface connector 49 and the second transmission cable 36 connected to the option connector 12 of the camera body 10.
The data can be transferred to the camera 9. The liquid crystal display element 34a is connected to the system control circuit 47. The liquid crystal display element 34a performs a predetermined display under the control of the system control circuit 47.

The system control circuit 47 is connected to a normal drive pulse generation circuit 50, a three-dimensional image drive pulse generation circuit 51, and a 2D / 3D switching circuit 52. C
The CD 41 detects an infrared two-dimensional image and a three-dimensional image under the control of the system control circuit 44. When detecting an infrared two-dimensional image, the system control circuit 47 switches the 2D / 3D switching circuit 52 to a two-dimensional image detection operation, and the normal drive pulse signal is output from the normal drive pulse generation circuit 50 to the CCD drive circuit 42. Is output to That is, the CCD 41 performs normal video drive based on the normal drive pulse signal, receives light in the infrared region reflected by the infrared reflection mirror 33, and detects an infrared two-dimensional image.

When detecting a three-dimensional image, the system control circuit 47 switches the 2D / 3D switching circuit 52 to the three-dimensional image detection operation, and the three-dimensional image driving pulse generating circuit 51 outputs the three-dimensional image driving pulse. The signal is output to the CCD drive circuit 42. That is, the CCD 41
Is controlled based on a driving pulse signal for a three-dimensional image, and performs a distance image detecting operation described later.

A light emitting element control circuit 53 is connected to the three-dimensional image drive pulse generation circuit 51. The light emitting element 31a is connected to the light emitting element control circuit 53. The light emitting element control circuit 53 controls the light emitting operation of the light emitting element 31a based on the three-dimensional image driving pulse signal output from the three-dimensional image driving pulse generating circuit 50. The light emitting element 31a is a laser diode (LD), and the laser light emitted from the light emitting element 31a is applied to a subject, and is used as distance measuring light for later-described distance measurement.

In this embodiment, an image detection operation is started in the three-dimensional image detection unit 30 in conjunction with the operation of a release switch (not shown) of the camera 9. That is, when the release switch is operated in the camera 9, the two-dimensional image detection operation by the camera 9 and the image detection operation by the three-dimensional image detection unit 30 are started. There are an external trigger mode and a light receiving trigger mode as modes linked with the operation of the release switch.

The external trigger mode is a mode in which the detection operation is linked using a trigger signal output from the hot shoe 11 when the release switch of the camera 9 is pressed. The trigger signal output from the hot shoe 11 is a signal output to emit flash light from the strobe in conjunction with the operation of the release switch.
In the external trigger mode, the trigger signal is transmitted to the three-dimensional image detection unit 30 via the first transmission cable 35. The trigger signal input to the three-dimensional image detection unit 30 is input to the system control circuit 47 via the external trigger input circuit 54. The system control circuit 47 controls the start of image detection according to the trigger signal. According to this mode, the hot shoe 11
The detection operation of the camera 9 and the three-dimensional image detection unit 30 can be linked using a conventional digital still camera having

The light-receiving trigger mode is a mode in which the detection operation is linked by using the flash light emitted simultaneously when the release switch of the camera 9 is pressed. When the release switch of the camera 9 is pressed, a flash light is emitted from a strobe built in the camera 9 in conjunction with this. In the light reception trigger mode, the reflected light of the flash light is sensed by the flash light detection unit 32. When the flash light is sensed, a trigger signal is generated in the light receiving trigger generation circuit 55 and transmitted to the system control circuit 47. The system control circuit 47 controls the start of image detection according to the trigger signal. According to this mode, a camera 9 and a three-dimensional image detection unit 30 are used by using a conventional digital still camera having a built-in strobe.
Can be linked with each other.

As described above, the image is detected by the three-dimensional image detection unit 30 in conjunction with the operation of the release switch of the camera 9, and when the release switch is pressed once, the two-dimensional image and the three-dimensional image A distance image and an infrared two-dimensional image by the detection unit 30 can be obtained. Since these images are detected by the same optical axis, a two-dimensional image and an infrared two-dimensional image can be compared and corrected. Also, by associating the high-resolution two-dimensional image detected by the camera 9 with the distance image detected by the three-dimensional image detection unit 30 for each pixel,
A high-definition three-dimensional image can be generated.

Next, with reference to FIGS. 8 and 9, the principle of distance measurement for three-dimensional image detection in this embodiment will be described. In FIG. 9, the horizontal axis represents time t.

The distance measuring light output from the distance measuring device B is reflected by the subject S and received by a CCD (not shown). The distance measuring light is a pulsed light having a predetermined pulse width H, and therefore, the reflected light from the subject S is also a pulsed light having the same pulse width H. The rise of the reflected light pulse is delayed by a time δ · t (δ is a delay coefficient) from the rise of the distance measuring light pulse. The reflected light of the distance measuring light travels twice the distance r between the distance measuring device B and the subject S, and the distance r is obtained by the equation (1). Where C is the speed of light. r = δ · t · C / 2 (1)

For example, a state in which the reflected light can be detected from the rise of the pulse of the distance measuring light is determined, and the state is switched to an undetectable state before the reflected light pulse falls, that is, a reflected light detection period T is provided. And the received light amount A in the reflected light detection period T is a function of the distance r. That is, the light receiving amount A decreases as the distance r increases (the time δ · t increases).

In this embodiment, utilizing the above-described principle,
The distance from the three-dimensional image detection unit 30 to the subject is detected by detecting the amount of received light A in each of the plurality of photodiodes provided in the CCD 41 and arranged two-dimensionally, and shows a three-dimensional image of the subject S. You are entering data.

Next, the operation of detecting a three-dimensional image in this embodiment will be described with reference to FIG. When a power switch (not shown) is set to the ON state in step 101, it is determined in step 102 whether the camera 9 is in the PC communication mode. That is, it is determined whether or not the camera 9 is set to a mode in which data can be exchanged with a personal computer or the like. If it is determined that the PC communication mode is set, the three-dimensional image data detected by the three-dimensional image detection unit 30 is transferred to the camera 9 via the second transmission cable 36 and the option connector 12 and recorded in step 103. In step 104, it is determined whether or not the data transmission has been completed. When the data transmission has been completed, the process proceeds to step 105.

In step 105, it is determined whether or not the mode is set to the light receiving trigger mode. If it is determined that the light receiving trigger mode is set, the process proceeds to step 107,
It waits until the flash light detection unit 32 receives the flash light. On the other hand, if it is determined in step 105 that the mode is not the light receiving trigger mode, the process proceeds to step 106, and it is determined whether the mode is set to the external trigger mode. If it is determined that the mode is the external trigger mode, the process proceeds to step 108 and waits until a trigger signal from the hot shoe 11 is input. The mode is switched by manually switching a mode switch (not shown) provided in the three-dimensional image detection unit 30, and the selected mode is displayed on the liquid crystal display unit 34.

If the flash light is received in step 107 or the trigger signal from the hot shoe 11 is input in step 108,
In steps 1 to 209, detection of a three-dimensional image is started. In step 201, ranging light control is started. That is, the light emitting element 31a is driven, and pulsed ranging light is emitted. Next, at step 202, detection control by the CCD 41 is started. That is, the operation of detecting distance information based on the principle of the distance measurement described above is started. The signal charge of the detected distance information is output from the CCD 41 as an image signal. This image signal is temporarily stored in the image memory 46. In step 203, the ranging light control is switched to the off state, and the light emitting operation of the light emitting element 31a stops.

In step 204, the CCD 41 performs an operation for detecting an infrared two-dimensional image. Ie CCD
The normal shooting operation (CCD video control) by 41 is set to the ON state, and the detection control is started. An image signal of the infrared two-dimensional image is output from the CCD 41 and is stored in the image memory 4.
6 is temporarily stored.

In step 205, the arithmetic processing of the distance measurement (D) data is performed using the distance information obtained in step 202. This D data corresponds to the distance r from the subject to the three-dimensional image detection unit 30. In step 206, D data is output and temporarily stored in the image memory 46.

In step 207, a process of pasting a texture to the D data is performed. That is, the image signal of the infrared two-dimensional image and the D data are read out from the image memory 46, and the image signal of the two-dimensional image and the D data are associated with each other for each pixel to generate three-dimensional image data of the subject. Is done.

At step 208, image compression processing is performed on the three-dimensional image data. The image-compressed three-dimensional image data is temporarily stored in the image memory 46 in step 209, and the detection operation ends. Thereafter, the routine returns to step 101, and this routine is repeated until the power switch is set to the off state.

In this embodiment, the three-dimensional image detection unit 3
0 is the second transmission cable 3
6 is transferred to the camera 9 and recorded by the camera 9. However, by connecting the second transmission cable 36 to the personal computer, it is possible to transfer the three-dimensional image data to the personal computer and display it on a monitor or the like. Needless to say.

[0052]

As described above, according to the present invention, it is possible to obtain a three-dimensional image detecting unit which can be attached to and detached from a conventional digital still camera, and a digital still camera equipped with the three-dimensional image detecting unit can detect a three-dimensional image. Can be used as a device.

[Brief description of the drawings]

FIG. 1 is an external view of a camera equipped with a three-dimensional image detection unit.

FIG. 2 is a side view illustrating a mounted state of a three-dimensional image detection unit and a camera.

FIG. 3 is a diagram illustrating a mounting state of a three-dimensional image detection unit and a camera from a bottom surface.

FIG. 4 is a diagram illustrating a state in which a first positioning stay is fixed by a first positioning screw.

FIG. 5 is a view showing a shape of a coupling member.

FIG. 6 is a diagram schematically illustrating a positional relationship between a light source unit and an optical system in a state where the three-dimensional image detection unit is mounted on a lens barrel unit.

FIG. 7 is a block diagram illustrating a circuit configuration of a three-dimensional image detection unit.

FIG. 8 is a diagram for explaining the principle of distance measurement using ranging light.

FIG. 9 is a diagram showing a distance measuring light, a reflected light, a gate pulse, and a light amount distribution received by the CCD.

FIG. 10 is a flowchart illustrating an operation of detecting a three-dimensional image.

[Explanation of symbols]

 Reference Signs List 11 hot shoe 12 optional connector 13 lens barrel 20 positioning stay mechanism 30 three-dimensional image detection unit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/225 H04N 5 / 225F // H04N 101: 00 101: 00 (72) Inventor Nobuhiro Tani Tokyo 2-36-9 Maenocho, Itabashi-ku Asahi Gaku Kogyo Co., Ltd. (72) Inventor Kiyoshi Yamamoto 2-36-9 Maenocho, Itabashi-ku, Tokyo F-term in Asahi Gaku Kogyo Co., Ltd. 2F065 AA06 DD02 EE00 FF32.

Claims (12)

[Claims] The camera can be attached to the tip of a lens barrel of a camera,
A three-dimensional image detection unit for detecting three-dimensional image data, comprising: a light source unit that irradiates a subject with distance measuring light; and a reflected light of the distance measuring light from the subject. A three-dimensional image detection unit that measures the distance to the subject to detect the three-dimensional image data of the subject, and that the light that has entered the three-dimensional image detection unit is the reflected light, and a light component other than the reflected light. And 3. an incident light branching means for guiding the light into the camera separately.
Dimensional image detection unit. 2. In conjunction with an image detection operation of the camera,
The three-dimensional image detection unit according to claim 1, further comprising a detection operation interlocking unit that causes the three-dimensional image detection unit to start detecting the three-dimensional image data. 3. The three-dimensional image data detection unit according to claim 3, wherein the detection operation interlocking unit starts detecting the three-dimensional image data based on a trigger signal output from the camera in response to an operation of a release switch of the camera. 3. The three-dimensional image detection unit according to 2. 4. The camera according to claim 1, wherein the camera includes a hot shoe unit that outputs the trigger signal, and the detection operation interlocking unit includes a first transmission cable that transmits the trigger signal connectable to the hot shoe unit. Claim 3 characterized by the following:
3. A three-dimensional image detection unit according to item 1. 5. The three-dimensional image, wherein the camera includes a strobe unit that irradiates the subject with flash light in response to an operation of the release switch, and the detecting operation interlocking unit senses reflected light of the flash light. The three-dimensional image detection unit according to claim 2, wherein data detection is started. 6. The three-dimensional image detection unit according to claim 1, further comprising a three-dimensional image transfer unit that transfers the three-dimensional image data detected by the three-dimensional image detection unit to the camera. . 7. A second transmission cable for transferring the three-dimensional image data connectable to the option connector, wherein the camera has an option connector capable of inputting the three-dimensional image data. The three-dimensional image detection unit according to claim 6, comprising: 8. The three-dimensional image detection device according to claim 1, further comprising a positioning stay mechanism fixed to the camera and supporting the housing, the housing having a housing attached to the distal end of the lens barrel. unit. 9. The camera according to claim 8, wherein the camera has a tripod mounting mechanism that can mount a tripod, and the positioning stay mechanism includes a positioning stay fixing mechanism that can be fixed to the tripod mounting mechanism. 3D image detection unit. 10. The three-dimensional image detection device according to claim 1, further comprising a cylindrical housing along an outer periphery of the lens barrel, wherein the light source is disposed at an outer edge of the housing. unit. 11. The red light, wherein the distance measuring light and the reflected light are infrared light components, and the incident light branching means selectively reflects an infrared light component and transmits a light component other than the infrared light component. The three-dimensional image detection unit according to claim 1, wherein the three-dimensional image detection unit is an external reflection mirror. 12. The three-dimensional image detection unit according to claim 1, wherein the lens barrel has a screwing portion to which a filter can be mounted, and has a mounting mechanism that can be mounted to the screwing portion. .