JP4243938B2 - 3D image adapter and 3D image capturing device mounting mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an adapter used for mounting a three-dimensional image (three-dimensional image) capturing device on a photographing device such as a video camera incorporating a solid-state image sensor (CCD: Charge Coupled Device), and a three-dimensional image capturing device using this adapter. This relates to the mounting mechanism.
[0002]
[Prior art]
Up to now, a four-mirror system disclosed in Japanese Patent Application Laid-Open No. 11-146424 has been known as a stereoscopic image capturing device.
[0003]
This four-mirror system combines four mirrors in the center of the photographic lens when capturing an image with parallax by attaching an optical attachment for stereoscopic image shooting such as still images or moving images to one video camera. The video with parallax is divided into left and right and captured as shown in FIG. Then, the pair of left and right three-dimensional images are enlarged twice as shown in FIGS. 9B and 9C by image processing (A_L, A_R), Converted into a field sequential stereoscopic video signal, reproduced on a display screen, and stereoscopically viewed with shutter glasses or the like.
[0004]
When the left and right images are magnified twice by image processing in this way, the parallax is also emphasized by a factor of two, which may cause eye fatigue and the amount of parallax also changes depending on the size of the display. The amount of parallax becomes large.
[0005]
In Japanese Patent Application Laid-Open No. 11-46373, the present applicant has already disclosed a stereoscopic image capturing device (hereinafter referred to as a prior application device) capable of obtaining a stereoscopic image that does not impose a burden on the eyes while minimizing the amount of parallax. ).
[0006]
An example of the prior application device will be described with reference to FIGS. 10 to 13. First, FIG. 10 shows internal components housed in an optical attachment mounted on a video camera, and has an angle of view of 2θ at the center point 10 of the entrance pupil. The L image 11 directly enters the center point 10 by the camera to be photographed, and is taken in as an L image for the left eye.
[0007]
On the other hand, the R image 12 is reflected by the mirrors 13 and 14 twice, enters toward the center point 10, and is taken in as an R image for the right eye. In this case, the R image 12 is equivalent to being incident toward the intersection 15 of the broken line. At this time, the distance d between R and L is reduced to about ¼ compared to the above-described four-mirror system.
[0008]
Here, the right end portion 14 </ b> R of the mirror 14 is on the optical axis 16 of the photographing lens 2, and the inclination angle of the R image 12 incident at the same angle as the L image 11 together with the inclination angle of the mirror 13 is the center point 10. It is set to enter. Further, the left end portion 13L of the mirror 13 can be brought close to the optical axis 16 as long as the left ray 17 of the L-side video information is not obstructed, and the optical attachment can be greatly reduced in size.
[0009]
As a specific example, when designed for a camera having a focal length of 6 mm (horizontal angle of view of 43 ° with a 1/3 inch CCD) and an entrance pupil of 35 mm from the front surface of the photographing lens, d is about 20 mm. Become. That is, the same parallax can be obtained as when two cameras were photographed 20 mm apart. In the video obtained by this attachment, the left and right half images are each doubled by the image processing disclosed in Japanese Patent Application No. 7-334423, so that the parallax is also doubled. For this reason, it is equivalent to photographing two cameras 40 mm apart. This is somewhat smaller since the average left-right eye width of a person is 65 mm, but the effect of stereoscopic vision can be sufficiently obtained.
[0010]
The amount of parallax varies depending on the size of the display, which will be described with reference to FIGS. FIG. 11 shows the distance between the two cameras 20L and 20R as d.₁And the positional relationship when photographing the subject lined up with A, C, and B in the order closest to the cameras 20L and 20R.
[0011]
When convergence (intersection of the optical axis centers of the left and right cameras) is set to C, L and R images can be obtained from the respective cameras as shown in FIGS. These are converted into field-sequential signals and reproduced on the display 21 as shown in FIG. 12, and when viewed with the shutter glasses 22 so that the L video only enters the left eye and the R video only enters the right eye, C is positioned on the display 21, A is positioned in front of the display 21, and B is positioned in the back of the display 21.
[0012]
Here, it can be seen that when the video information is left as it is and the image is reproduced on a larger display 23 as shown in FIG. 13, all the parallaxes are expanded in the horizontal direction. As a result, the position of the image moves in the direction indicated by the arrow. In this case, if the interval b between the B images exceeds the human eye width (about 65 mm), fusion becomes difficult. If the amount of parallax is not appropriate, it may cause fatigue in stereoscopic viewing.
[0013]
With respect to this point, it is only necessary to refer to the amount of parallax in a method that brings about a sense of depth by using the Pullfrich effect for an image that moves in the horizontal direction. That is, when an ND filter is attached to one eye to weaken the light, a transmission delay to the cerebrum occurs, and an image with a time difference between the left and right eyes is processed by the cerebrum and stereoscopically viewed. Although the delay is about 10 msec, a natural three-dimensional effect is obtained even at a movement of 1 m per second. In this case, this is equivalent to a camera interval of 100 × 0.01 = 1 cm. From this, it is understood that the minimum necessary amount of parallax is sufficient for stereoscopic viewing. Although this is limited by the size of the lens and its horizontal angle of view, shooting with a parallax amount less than or equal to the 3D (three-dimensional) optical attachment to which the prior application device is applied cannot be performed by other means. .
[0014]
As described above, according to the prior application device, in the video equipment that captures a stereoscopic image, the image for one of the eyes incident from the single daylighting window is reflected on the right half of the photographing lens without being reflected by the mirror. The first eye and the second mirror are arranged to face each other directly through the image light for the one eye between the daylighting window and the photographing lens, and the image light for the other eye that is incident from the daylighting window. The angles of the first and second mirrors are set to angles that are taken into the left half of the taking lens by reflection. As a result, the amount of parallax can be reduced to 1/3 to 1/4 compared to the four-mirror method, and photography can be performed with a deviation of ± 1.5 cm (on a 32-inch monitor) from near to infinity without adjustment. As a result, a stereoscopic image with less burden on the eyes can be obtained.
[0015]
[Problems to be solved by the invention]
Although the invention of the prior application has the above-mentioned excellent features, an adapter used for mounting the optical attachment (stereoscopic image capturing device) at a regular position is not specifically shown. The same applies to the four-mirror system described above.
[0016]
An object of the present invention is to provide an adapter capable of easily and surely confirming a position when an optical attachment (stereoscopic image capturing device) is mounted on a photographing apparatus such as a video camera, and a mounting mechanism of the stereoscopic image capturing device using the adapter. Is to provide.
[0017]
[Means for Solving the Problems]
  That is, the present invention is used to attach a stereoscopic image capturing device (optical attachment) to a photographing device,It has a position defining means for defining an attachment position for the photographing apparatus, and is configured to be attached to the casing of the photographing apparatus through the position defining means.An adapter for stereoscopic image shooting,
    At least of the imaging deviceAboveThe part in contact with the housing is configured to be translucent,
    The viewfinder of the photographing apparatus configured as a video device for photographing a stereoscopic image so that the video for one eye is located in substantially one half of the screen and the video for the other eye is located in substantially the other half of the screen. The other half of the window corresponding to the image light for the other eye is subjected to a light shielding process or a process for reducing the amount of transmitted light.Cage,
    A cylindrical portion that is detachably fitted around a lens barrel portion provided in the casing of the photographing apparatus.  It is provided as the position defining means, and this cylindrical part is always on the outer peripheral surface of the lens barrel part at a different height position.  Consists of a plurality of inscribed circles whose center positions are different from each other.  One of the tangent circles is selected for each of the different height positions,
The present invention relates to an adapter for photographing a three-dimensional image and a mounting mechanism for supporting the three-dimensional image capturing device on the adapter by concave-convex fitting or the like.
[0018]
According to the present invention, in order to attach an optical attachment (stereoscopic image capturing device) for photographing a stereoscopic image such as a still image or a moving image to the photographing device, at least a portion in contact with the housing of the photographing device is a translucent adapter. This makes it possible to mount the adapter while checking the position of the housing (especially the viewfinder, flash or sensor) located inside the adapter, making it easier to position and mounting at the correct position during shooting. I can confirm.
[0019]
Even if the adapter covers various sensors such as distance and brightness measurement, it is translucent, so it does not hinder the operation of the sensor (in the case of a sensor using infrared light, it is transparent to infrared light). Material)), does not interfere with the irradiation of auxiliary light such as flash (in the case of night shot by infrared light, it should be transparent to infrared light), and does not interfere with the function of the viewfinder (viewing window or liquid crystal ( LCD) etc.), warnings when using the automatic shooting self-timer, display lamp display is not obstructed, and it does not interfere with the light receiving unit for remote control operation (infrared light is transparent for sensors using infrared light) Material).
[0020]
  Also, when attaching the adapter to the camera housing, screws and the like can be attached while confirming the position of the attachment holes, so positioning is easy and alignment of the concave and convex parts during installation is also possible. It becomes easy.
  Further, the adapter has a window portion facing the viewfinder of the photographing apparatus, and a light shielding process or a transmission is performed on substantially the other half portion of the window portion corresponding to the image light for the other eye (for example, for the right eye). Since the processing for reducing the amount of light is performed, the amount of light incident on the processing region is cut or reduced, and at the same time, a sufficient amount of light incident on the non-processing region is obtained. Therefore, if focusing or the like is set based on image light for one eye (for example, for the left eye) that is incident light from this non-processed area, it is easy to shoot and the image becomes clear. At this time, the adapter can be easily attached to a regular position while checking the position of the finder without hindering the function of the finder due to the above-described translucency of the adapter.
  The cylindrical portion of the adapter is composed of a plurality of inscribed circles whose center positions are different from each other so that the cylindrical portion of the adapter is always inscribed in the outer peripheral surface of the lens barrel portion at different height positions. Since any one is selected for each of the different height positions, even if the height of the lens barrel portion differs depending on the model of the photographing apparatus, the outer periphery of the lens barrel portion is accordingly changed to the cylindrical shape of the adapter. The center of the adapter can be easily and accurately aligned with the center of the regular lens barrel by simply joining to any inner periphery of the part.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, it is desirable that the portion corresponding to the finder, the flash, or the sensor of the photographing apparatus is configured to be translucent in order to obtain the above-described effects.
[0022]
Further, it is preferable that the adapter has a position restricting means for defining an attachment position with respect to the photographing apparatus, and is configured to be attached to the housing of the photographing apparatus via the position defining means.
[0023]
When the height (center) position of the lens barrel is different depending on the model of the imaging device, the adapter is detachably fitted around the lens barrel provided in the housing of the imaging device. A plurality of inscribed circles whose center positions are different from each other so that the cylindrical portion is always inscribed in the outer peripheral surface of the lens barrel portion at different height positions. Is preferably selected for each of the different height positions.
[0024]
In addition, in order to define the mounting position of the adapter, the adapter has a fixed plate portion that comes into contact with the casing of the photographing apparatus and is detachably fixed to the casing. It is desirable that a concave portion or a convex portion that is concavo-convexly fitted in the fixing plate portion is provided as the position restricting means.
[0025]
In addition, the adapter has a fixing plate portion that is in contact with the casing of the photographing device and is detachably fixed to the casing, and a plurality of fixing positions are provided on the fixing plate portion, These fixed positions are preferably selected for different models of the imaging apparatus. It is preferable that the fixed plate portion and the upright plate portion connected to the fixed plate portion are also configured to be transparent.
[0026]
In this case, it is preferable that the plurality of fixed positions exist on the bottom surface of the casing of the photographing apparatus and also serve as a fixed position of a tripod with respect to the casing.
[0027]
Further, in order to accurately capture a stereoscopic image, the adapter has a fixing plate portion that is in contact with the bottom surface of the casing of the photographing apparatus and is detachably fixed to the casing. A projecting plate portion projecting downward so that the stereoscopic image capturing device is held in a non-contact state with the mounting surface when mounted on the mounting device and mounted on the mounting surface. It is desirable that the stereoscopic image capturing device is configured to contact the mounting surface and not change the parallelism or the like.
[0028]
In the present invention, the imaging device is an imaging device that captures a stereoscopic image such that an image for one eye is located in approximately one half of the screen and an image for the other eye is positioned in approximately the other half of the screen. The stereoscopic image capturing device may be configured to capture the image light for the one eye and the image light for the other eye, respectively.
[0029]
In this case, in order to obtain a stereoscopic image with less burden on the eyes by reducing the amount of parallax between both eyes, the stereoscopic image capturing device includes:
Without directly reflecting the image light for the one eye incident from a single daylighting window with a mirror, directly capturing the image light for one eye corresponding to the image for the one eye;
Between the daylighting window and the photographing lens, a plurality of mirrors are arranged to face each other via the image light for the one eye.
The angles of the plurality of mirrors are set to angles at which the image light for the other eye entering from the daylighting window is taken into the other half of the photographing lens by reflection.
It is desirable that each of the above is configured.
[0031]
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[0032]
1 to 4 show an adapter for mounting an optical attachment (stereoscopic image capturing device) according to the present embodiment and a video camera using the adapter (here, a digital still camera: hereinafter abbreviated as a digital camera, It is possible to shoot not only pictures but also moving pictures.) This shows a mounting mechanism of the three-dimensional image capturing device.
[0033]
As shown in FIGS. 1 to 3, the adapter 30 according to the present embodiment is entirely formed of a light-transmitting or transparent plastic, and an optical attachment (stereoscopic image capturing device) 31 is attached to the adapter 30. It is done.
[0034]
At the time of this attachment, as shown in FIG. 2, the optical attachment is formed on the internal thread portion 34 formed on the inner periphery of the cylindrical portion 33 formed on the adapter 30 corresponding to the cylindrical shape of the ring portion 32 of the optical attachment 31. The external thread part 35 formed on the outer periphery of the ring part 32 of 31 is fitted by screwing so that the optical attachment 31 is detachably fixed. Although not shown in the drawing, after the protrusion formed on the outer periphery of the ring portion 32 is fitted into the notch formed on the inner periphery of the cylindrical portion 33, the optical attachment 31 is slightly rotated around the optical axis 16. Even if the position is fixed, the optical attachment 31 can be fixed to the adapter 30 at a regular position as shown in FIG. Then, the optical attachment 31 can be removed from the adapter 30 by the reverse operation.
[0035]
The optical attachment 31 is schematically shown in cross section in FIG. 4, but the internal structure and function are the same as those shown in FIG. In other words, the optical attachment 31 causes the digital camera 37 to display an image for one eye (here, for the left eye) on approximately half of the screen and an image for the other eye (here, for the right eye) on the screen. Each image light is incident so as to be positioned in the approximately other half of the image lens, but approximately one half of the photographing lens 2 without reflecting the image light for the one eye incident from the single daylighting window 44 by a mirror. The plurality of mirrors 13 and 14 are arranged oppositely to each other between the daylighting window 44 and the photographing lens 2 via the image light for the one eye, and are incident on the other eye that is incident from the daylighting window 44. The angles of the plurality of mirrors 13 and 14 are set to the angles at which the image light is taken into substantially the other half of the photographing lens 2 by reflection.
[0036]
As shown in FIGS. 1 and 2, the adapter 30 has a fixed plate portion 38 to the digital camera 37 connected to the upright plate portion 36 provided with the cylindrical portion 33 at a substantially right angle in the front-rear direction. It is almost L-shaped.
[0037]
The cylindrical portion 33 of the adapter 30 has an inner peripheral surface 42 that is inscribed and fitted into the outer peripheral surface 41 of the ring portion 40 that allows the lens barrel 39 with a built-in lens of the digital camera 37 to enter and exit. Yes. As shown in FIG. 5, the inner peripheral surface 42 corresponds to the height position of the lens barrel portion 39 depending on the model of the digital camera 37, and as shown in FIG. The first arc surface 42A of the center 43A that coincides with the outer peripheral surface, and the second arc surface 42B of the center 43B that coincides with the outer peripheral surface of the ring portion 40 in the lower position of the lens barrel portion, Are configured so as to be inscribed in the outer peripheral surface 41 of the ring portion 40 having a predetermined height.
[0038]
As a result, even if the height of the lens barrel portion 39, that is, the ring portion 40 is different depending on the model of the digital camera 37, the outer periphery of the ring portion 40 is changed to the inner periphery 42A of any one of the ring portions 33 of the adapter 30 accordingly. Alternatively, the center of the adapter 30 can be easily and accurately aligned with the center of the regular lens barrel simply by being joined to 42B.
[0039]
In addition, screw holes 47A and 47B are formed in the fixing plate portion 38 provided at the bottom of the adapter 30, and these screw holes are originally for fixing the tripod of the digital camera 37, It is formed at different positions depending on the camera model. Then, without using a tripod, as shown in FIG. 6, for example, a screw 48 is screwed into the housing 49 of the digital camera 37 from one screw hole 47 </ b> A, thereby fixing the fixing plate 38 to the bottom surface of the camera housing 49. Screw it detachably. Instead of these screw holes 47A and 47B, a slot (long hole) 47C may be formed like a virtual line and screwed in this slot. The fixing plate portion 38 is formed with a positioning small hole 55 that fits with a small protrusion (not shown) provided on the camera housing.
[0040]
In this case, if the screwing position is changed according to the camera model, the fixing plate portion 38 can always be fixed to the camera housing 49. In addition, a positioning protrusion 50 is formed in an L shape in advance at the corner of the fixed plate portion 38 on the camera housing side, and this is unevenly fitted to the protrusion 51 of the camera housing 49. Then, the positional relationship between the two is determined and the above-described screwing is performed. As a result, the fixing plate portion 38 can always be fixed at a proper position with respect to the camera housing 49.
[0041]
Further, in the fixed plate portion 38, a protruding plate portion 52 that protrudes downward at a substantially right angle is integrally provided below the ring portion 33. The protruding plate portion 52 becomes a leg portion when the adapter 30 is attached to the camera housing 49 as shown in FIG. 7A and placed on the placement surface 53 as shown in FIG. 7B. In addition, the lower end surface 54 in contact with the mounting surface 53 is parallel to the fixed plate portion 38.
[0042]
Accordingly, since the lower end of the protruding plate portion 52 and the lower end of the fixed plate portion 38 are supported in contact with each other on the mounting surface 53, the optical attachment 31 with a built-in mirror contacts the mounting surface 53 so that the mirrors 13 and 14 are in contact with each other. Since these are not subjected to impact force or the like, these mirrors can always be held in a normal state.
[0043]
In addition, a window 46 facing the viewfinder 45 of the digital camera 37 is provided on the top of the standing plate 36 of the adapter 30. For example, a half 46A of the window 46 corresponding to the right eye image light is shielded from light. Processing or processing for reducing the amount of transmitted light, such as embossing or blackening processing, is performed, and the other half portion 46B has sufficient translucency without being subjected to such processing.
[0044]
That is, when the target image is viewed from the finder 45 with the optical attachment 31 attached to the digital camera 37, for example, image light for the left eye enters through the light transmitting portion 46B of the window portion 46 of the adapter 30. The video light for the right eye does not enter from the half portion 46A subjected to the light shielding process or the transmitted light amount reduction process, or enters only with a low light quantity. FIG. 8 schematically shows the state with an image.
[0045]
Therefore, when the adapter 30 is attached to the camera and used, it is possible to shoot with the left eye image in focus (focus) at the time of shooting, so that a good image can always be reproduced on the display screen, and the shooting state can be changed. Can be confirmed. Of course, if the adapter 30 is removed from the camera, it can be used as a normal digital camera that does not reproduce a stereoscopic image.
[0046]
Further, since the adapter 30 is made of a translucent material, the inner state of the adapter 30 can be confirmed from the outside, and it is easy to handle and attach to the camera, and to check the attachment state. .
[0047]
Specifically, first, when the adapter 30 is attached to the camera housing 49, the adapter 30 can be attached while checking the position of the lens barrel part 39 through the cylindrical part 33, so that positioning is easy. Become. In this case, when a retractable photographic lens is used, it is possible to visually confirm that the lens barrel portion 39 enters and exits, and when the power is turned off, the lens barrel portion 39 sinks. The adapter 30 can be removed by visual inspection, and when the power is turned on, the adapter 30 can be turned on after confirming that the adapter 30 is securely attached. The lens barrel portion 39 having a mechanically fragile mechanism can be protected by the transparent cylindrical portion 33. The adapter 30 may be always attached to the camera housing 49.
[0048]
However, the transparent portion of the adapter 30 is not the portion corresponding to the lens barrel portion, and the pedestal portion of the adapter (the portion in contact with the camera housing, for example, the fixed plate portion 38 or the standing plate portion 36) is transparent. It may be desirable. That is, it is desirable to avoid the light from entering the lens barrel.
[0049]
Further, even if the adapter 30 covers various sensors such as distance and brightness measurement, the adapter 30 is transparent, so that the operation of the sensor is not hindered (in the case of a sensor using infrared light, infrared light is used). Transparent material), does not interfere with the irradiation of auxiliary light such as flash (in the case of night shot by infrared light, it should be transparent to infrared light), and does not interfere with the function of the finder (the finder is (When using a viewing window, LCD, etc.), warnings when using the automatic shooting self-timer, display lamp display is not obstructed, and it does not interfere with the light receiving unit that performs remote control operation (infrared light for sensors using infrared light) Transparent material).
[0050]
As described above, in the adapter 30, it is preferable that the vicinity of the sensor, the vicinity of the flash, or the vicinity of the finder (more preferably, only approximately half of the finder is transparent as described above) is transparent.
[0051]
On the other hand, it is preferable not to make the optical attachment 31 (especially the vicinity of the mirror) transparent, and it is more preferable that the vicinity of the mirror is not completely transparent. That is, it is desirable that light from other than the front of the camera does not hit the mirror.
[0052]
Furthermore, when the adapter 30 is attached to the housing 49, it is possible to attach a screw or the like while checking the position of the attachment hole, so that positioning is easy, and alignment of the concave and convex portions at the time of attachment is also possible. It becomes easy.
[0053]
The embodiment described above can be variously modified based on the technical idea of the present invention.
[0054]
For example, the transparent portion of the adapter 30 described above is preferably sufficiently transparent, but may be translucent as long as it is visible light transmissive. The shape, size, material, and the like of the adapter 30 may be variously changed, and the position defining means and the fixing means when attached to the camera are not limited to those described above. Moreover, the adapter 30 and the optical attachment 31 may be integrally formed, for example, may be integrally formed. In this case, the optical attachment 31 can be accurately arranged at a normal position as designed at the time of molding, which is advantageous.
[0055]
In addition, the attachment target of the adapter is not limited to the above-described digital camera, and may be another video camera as long as it has a CCD, magnetic disk, or magnetic tape recording function.
[0056]
The above-described video for each eye is not only reproduced on a display separate from the camera, but also reproduced on a monitor screen attached to the camera, and this monitor is provided with a finder function as described in FIG. You may enable it to monitor the image | video for left eyes.
[0057]
Furthermore, the present invention is suitable when the optical attachment shown in FIG. 10 is mounted, but is also applicable when mounting a normal four-mirror optical attachment, and is not limited to a still image, It is also effective for movie shooting. Further, the present invention is not limited to the above-described stereoscopic image observation using the shutter glasses method, and can be applied to general known stereoscopic image observation using parallax or the like due to polarized light or the like.
[0058]
[Effects of the invention]
As described above, the present invention uses a translucent adapter at least at a portion in contact with the housing of the photographing apparatus in order to attach the stereoscopic image capturing apparatus for photographing a stereoscopic image to the photographing apparatus. The adapter can be attached while confirming the position of the housing located inside, facilitating the positioning, and confirming the mounting at the correct position even during shooting.
[0059]
Also, even if the adapter covers various sensors such as distance and brightness measurement, it is translucent, so it does not interfere with the operation of the sensor, does not interfere with the irradiation of auxiliary light such as flash, and the function of the finder It does not interfere, does not interfere with warnings and display lamps when using the automatic shooting self-timer, etc., and does not interfere with the light receiving unit that performs remote control operations.
[0060]
  Also, when attaching the adapter to the camera housing, screws and the like can be attached while confirming the position of the attachment holes, so positioning is easy and alignment of the concave and convex parts during installation is also possible. It becomes easy.
  Further, the adapter has a window portion facing the viewfinder of the photographing apparatus, and a light shielding process or a transmission is performed on substantially the other half portion of the window portion corresponding to the image light for the other eye (for example, for the right eye). Since the processing for reducing the amount of light is performed, the amount of light incident on the processing region is cut or reduced, and at the same time, a sufficient amount of light incident on the non-processing region is obtained. Therefore, if focusing or the like is set based on image light for one eye (for example, for the left eye) that is incident light from this non-processed area, it is easy to shoot and the image becomes clear. At this time, the adapter can be easily attached to a regular position while checking the position of the finder without hindering the function of the finder due to the above-described translucency of the adapter.
  The cylindrical portion of the adapter is composed of a plurality of inscribed circles whose center positions are different from each other so that the cylindrical portion of the adapter is always inscribed in the outer peripheral surface of the lens barrel portion at different height positions. Since any one is selected for each of the different height positions, even if the height of the lens barrel portion differs depending on the model of the photographing apparatus, the outer periphery of the lens barrel portion is accordingly changed to the cylindrical shape of the adapter. The center of the adapter can be easily and accurately aligned with the center of the regular lens barrel by simply joining to any inner periphery of the part.
[Brief description of the drawings]
FIG. 1 is a front view (a), a bottom view (b), and a rear view (c) of an adapter according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view when the optical attachment (stereoscopic image capturing device) is attached to the camera using the adapter.
FIG. 3 is a perspective view of the mounted state.
FIG. 4 is a schematic longitudinal sectional view of the optical attachment (stereoscopic image capturing device).
5A is a front view when the adapter is attached to the camera, and FIG. 5B is a schematic view showing the inner peripheral surface of the adapter that is inscribed in the lens barrel portion of the camera.
6 is a cross-sectional view taken along the line VI-VI in FIG. 1 when the adapter is attached to the camera. FIG.
FIG. 7 is a front view when the adapter is attached to the camera, and a side view including an optical attachment (stereoscopic image capturing device).
FIG. 8 is a schematic view of the reproduced left and right eye images.
9A and 9B are an explanatory diagram when cutting left and right videos in a conventional stereoscopic image shooting, an explanatory diagram of an image for the left eye cut out and enlarged, and a cut and enlarged image. It is explanatory drawing (c) of the image | video for right eyes.
FIG. 10 is a schematic sectional view showing an optical system of an optical attachment (stereoscopic image capturing device) by the prior application device.
FIG. 11 is an explanatory diagram showing the positional relationship of the subject at the time of shooting.
FIG. 12 is an explanatory diagram showing the amount of parallax when reproduced on the display.
FIG. 13 is an explanatory diagram showing the amount of parallax when reproduced on a large display.
[Explanation of symbols]
2 ... Lens, 10 ... Center point, 11 ... L video, 12 ... R video,
13, 14 ... mirror, 15 ... intersection, 16 ... optical axis of lens, 17 ... light beam,
20L, 20R ... Camera, 21, 23 ... Display,
22 ... Shutter glasses, 30 ... Adapter,
31 ... Optical attachment (stereoscopic image capturing device), 32 ... Ring part,
33 ... cylindrical portion, 34 ... female screw portion, 35 ... male screw portion, 36 ... standing plate portion,
37 ... digital camera, 38 ... fixed plate part, 39 ... lens barrel part, 40 ... ring part,
41 ... Outer peripheral surface, 42 ... Inner peripheral surface, 42A, 42B ... Arc surface,
43A, 43B ... center, 45 ... finder, 46 ... window,
46A ... one half (with light shielding treatment), 46B ... other half (without light shielding treatment),
47A, 47B ... screw hole, 47C ... slot, 48 ... screw, 49 ... housing,
50 ... ridge part, 51 ... projection part, 52 ... projecting plate part, 53 ... mounting surface, 54 ... lower end surface

Claims (13)

It is used for mounting a stereoscopic image capturing device on a photographing apparatus, and has a position defining means for defining a mounting position with respect to the photographing apparatus, and is configured to be attached to the casing of the photographing apparatus via the position defining means. Adapter for taking a stereoscopic image,
At least, the housing and the contact portion of the imaging device is configured on a transparent,
The viewfinder of the photographing apparatus configured as a video device for photographing a stereoscopic image so that the image for one eye is located in substantially one half of the screen and the image for the other eye is located in substantially the other half of the screen. The other half of the window corresponding to the image light for the other eye has been subjected to a light shielding process or a process for reducing the amount of transmitted light,
The lens barrel portion having a cylindrical portion that is detachably fitted around a lens barrel portion provided in the casing of the photographing apparatus as the position defining means, and the cylindrical portion is at a different height position. to be inscribed always on the outer peripheral surface of the center position consist different inscribed circle each other, one of these inner Se'en is selected for each of the different height positions,
Adapter for 3D image shooting. A fixing plate portion that is in contact with the casing of the photographing apparatus and is detachably fixed to the casing is provided, and a concave portion or a convex portion that is concavo-convexly fitted into the casing is fixed as the position defining means. The adapter according to claim 1 , wherein the adapter is provided on the plate portion. There is a fixed plate portion that is in contact with the housing of the photographing apparatus and is detachably fixed to the housing, and a plurality of fixed positions are provided on the fixed plate portion, and these fixed positions are The adapter according to claim 1 , which is selected for each different model of the photographing apparatus. The adapter according to claim 3 , wherein the plurality of fixing positions exist on a bottom surface of the casing of the photographing apparatus and also serve as a fixing position of a tripod with respect to the casing. The imaging device has a fixed plate portion that is in contact with a bottom surface of the housing and is detachably fixed to the housing, and a protruding plate portion protruding downward is provided on the fixed plate portion. when placed on the mounting in the mounting surface on the said the stereoscopic image capture device to the mounting surface and adapted to be held in a non-contact state, the adapter according to claim 1. The adapter according to claim 2, 3, or 5 , wherein the fixed plate portion and the standing plate portion connected to the fixed plate portion are configured to be transparent. There is an adapter for mounting the stereoscopic image capturing device to the photographing device, and this adapter is
While supporting the stereoscopic image capture device has a position defining unit for provisions of the mounting position relative to the imaging device is configured to be attached to the housing of the imaging device via the position-defining means,
At least, the housing and the contact portion of the imaging device is configured on a transparent,
The viewfinder of the photographing apparatus configured as a video device for photographing a stereoscopic image so that the image for one eye is located in substantially one half of the screen and the image for the other eye is located in substantially the other half of the screen. The other half of the window corresponding to the image light for the other eye has been subjected to a light shielding process or a process for reducing the amount of transmitted light,
The lens barrel portion having a cylindrical portion that is detachably fitted around a lens barrel portion provided in the casing of the photographing apparatus as the position defining means, and the cylindrical portion is at a different height position. to be inscribed always on the outer peripheral surface of the center position consist different inscribed circle each other, one of these inner Se'en is selected for each of the different height positions,
Mounting mechanism of a 3D image capturing device for 3D image shooting. The mounting mechanism according to claim 7 , wherein the three-dimensional image capturing device is detachably supported by the concave and convex fitting with respect to the adapter.   The adapter is provided with a fixed plate portion that is brought into contact with the housing of the photographing apparatus and is detachably fixed to the housing, and a concave portion or a convex portion that is unevenly fitted to the housing is the position defining means. The mounting mechanism according to claim 7, wherein the mounting mechanism is provided on the fixed plate portion. The adapter is provided with a fixed plate portion which is brought into contact with the housing of the photographing apparatus and is detachably fixed to the housing, and a plurality of fixing positions are provided on the fixed plate portion. The mounting mechanism according to claim 7 , wherein a position is selected for each different model of the photographing apparatus. The mounting mechanism according to claim 10 , wherein the plurality of fixing positions exist on a bottom surface of the casing of the photographing apparatus and also serve as a fixing position of a tripod with respect to the casing. The adapter is provided with a fixed plate portion that is in contact with the bottom surface of the housing of the photographing apparatus and is detachably fixed to the housing, and a protruding plate portion that protrudes downward is provided on the fixed plate portion, The mounting according to claim 7 , wherein the stereoscopic image capturing device is configured to be held in a non-contact state with the mounting surface when the adapter is mounted on the imaging device and mounted on the mounting surface. mechanism. The mounting mechanism according to claim 9, 10, or 12 , wherein the fixed plate portion and the standing plate portion provided in series with the fixed plate portion are configured to be transparent.

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