JP2687773B2 - Stereo camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic camera for taking an image while sliding a lenticular plate while bringing the lenticular plate into contact with the photosensitive member and keeping the photosensitive member stationary.

[0002]

2. Description of the Related Art As an application for a stereoscopic camera, the applicant has disclosed Japanese Patent Application No. 3-48004.

According to the present invention, a film bag for mounting a film is mounted on a body body having a taking lens and a shutter mechanism to form a light-shielding space inside the camera, while a cylindrical lens extending vertically is formed inside the body body. A large number of lenticular plates are installed in front of the film, and the lenticular plates and the film are lightly contacted, and the shutter is opened while rotating the subject horizontally around the subject itself, While the lens is open, the lenticular plate is slid horizontally by one pitch of the cylindrical lens to perform stereoscopic photography.

[0004]

By the way, the image forming position of the object image transmitted through the lenticular plate is based on the focal length of the cylindrical lens forming the lenticular plate. However, since the conventionally proposed method is a method in which a photoconductor is brought into contact with a lenticular plate for photographing, it is important to strictly adhere to the thickness of the lenticular plate in accordance with the focal length of the cylindrical lens.

That is, when the thickness of the lenticular plate is larger than the focal length of the cylindrical lens, the photosensitive body is arranged outside the focal length of the cylindrical lens, so that the converged image exposed on the photosensitive body is blurred. Also, when the thickness of the lenticular plate is smaller than the focal length of the cylindrical lens, the converged image exposed on the photoconductor is blurred.

As described above, in the conventional proposals, the thickness of the lenticular plate is strictly +1 so that the subject image from the photographing lens is formed on the back surface of the lenticular plate.
It is necessary to make it within 0 micron. If this is not done, the convergent image will be large, the sharpness and the number of composite images will be poor,
The three-dimensional effect is disturbed. However, it is very difficult to make the thickness uniform within the above range by hot press molding.
The yield is whether or not 0 good products can be obtained by hot press molding.

[0007]

According to the present invention, when a subject image from a photographing lens is exposed to a photoconductor through a lenticular plate, the image is exposed to an image forming position of a lenticular plate which is different from each other. An object of the present invention is to provide a stereoscopic camera capable of taking a sharp stereoscopic photo by positioning the photosensitive surface of the body.

In order to achieve this object, in the stereoscopic photographing camera according to the present invention, a lenticular plate for converging a subject image from a photographing lens in a vertical stripe pattern is slidable in a horizontal direction inside a body of the camera. A stereoscopic photographing camera in which a photoconductor that exposes the striped subject image is disposed at a rear portion of the lenticular plate disposed inside the body, and a vertical stripe is formed at the rear portion of the body by the lenticular plate. Image receiving means for receiving a subject image converged in a uniform manner, interval adjusting means for moving the image receiving means forward and backward with respect to the lenticular plate, and support means for supporting the photoconductor so as to face the lenticular plate, The distance adjusting means supports the supporting means so that the relative facing distance between the photoconductor and the lenticular plate can be adjusted. To.

[0009]

According to the stereoscopic camera of the present invention, the thickness of the stripe of the subject image passing through the lenticular plate is detected by the image receiving means, and the image receiving means is moved to the position where the stripe of the subject image is the thinnest. By moving the photosensitive member supported by the supporting member to the position where the image receiving unit is located, the photosensitive surface of the photosensitive member is positioned at the position where the vertical stripes of the subject image are the thinnest. As a result, even if the thickness of each lenticular plate is different, it is possible to detect an appropriate image forming position for each lenticular plate used for photographing.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a stereoscopic camera according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a sectional structure of a stereoscopic photographing camera according to the first embodiment, and 1 is a body of the stereoscopic photographing camera. A photographing lens 2 is provided on the front wall 1a of the body 1.
Is detachably mounted. An opening 3 is opened in a portion of the front wall 1a where the taking lens 2 is attached. The photographic lens 2 is provided with a diaphragm and a shutter (not shown), and the diaphragm and the shutter can be opened and closed by computer control. A lenticular plate 4 is arranged inside the body of the front wall portion 1a. The lenticular plate 4 is
A large number of cylindrical lenses extending in the vertical direction of the body 1 are arranged in a row in the horizontal direction, and one pitch of the cylindrical lenses is set to 0.4 mm in this embodiment. The lenticular plate 4 has a wall thickness shorter than the focal length of the cylindrical lens so that the back surface of the lenticular plate 4 is located within the image forming position of the cylindrical lens. The lenticular plate 4 is screwed and fixed to the lens holding frame 6 via the glass plate 5.

The lens holding frame 6 has a tubular body shape with a rectangular cross section, and has a flange 6a protruding outward from the tubular body. The flange 6a is bolted to a slide plate 7 having an opening similar to that of the lens holding frame 6 on the inside, and bearings 8 are provided at four corners of the slide plate 7 on the body front wall 1a side in the vertical and horizontal directions. Has been done. A guide shaft 9 extending in the horizontal direction in parallel with the front wall portion 1a is slidably held by the bearing 8 formed as a pair in the vertical and horizontal directions.
Both ends of the guide shaft 9 are held by brackets 10 formed at four locations on the peripheral edge of the opening 3 of the front wall 1a. The bracket 10 is provided so as to project upward and downward in pairs so that the two guide shafts 9 are arranged in parallel.

A holding metal fitting 11 for holding both of the slide plate 7 and the flange 6a in the thickness direction is fixed to the right end portions of the slide plate 7 and the flange 6a. The holding metal fitting 11 is provided with a spring 12 protruding from the right side wall 1b of the body 1. Is supported at the tip of. A cam 13 is attached to the left end of the slide plate 7 and the flange 6a. The cam 13 has a cam surface formed of a tapered surface extending in a direction orthogonal to the lenticular plate 4 and inclined in a direction intersecting the left side wall portion 1c of the body 1. A cam 14 having a similar tapered surface as a cam surface is in sliding contact with the cam surface of the cam 13 with respect to the cam 13. The cam 14 is fixed to the right end of a bracket 15 that slides in the vertical direction of the body 1, and the bracket 15 is integrally fixed to a nut 17 that is screwed into a screw screw 16 rotatably provided on the upper and lower wall surfaces of the body 1. Has been done. The left end of the bracket 15 is slidably guided in the vertical direction by a guide 18 provided on the left side wall of the body 1.

The screw screw 16 is rotated by a pulse motor (not shown) which is computer-controlled via a bevel gear mechanism (not shown) provided in the lower portion of the body 1 to move the bracket 15 integrated with the nut 17 up and down, and to rotate the spring. The slide plate 7 and the flange 6 a are slid along the guide shaft 9 against the elastic urging force of 12. The cam surfaces of the cams 13 and 14 are for converting the rotational movement of the screw screw 16 into a horizontal movement in order to slide the lenticular plate 4 at a very slow speed. The back side of the lenticular plate 4 is rotated by the screw screw 16.
Slide along the one-dot chain line A in FIG.

A rectangular opening 19 facing the lenticular plate 4 is opened in the rear wall 1d of the body 1. A frame body 20 is fixed to a peripheral portion of the opening 19. The frame 20 has a cylindrical inner wall surface 20 a, and this inner wall surface 20 a is a guide surface extending in a direction orthogonal to the lenticular plate 4. A positioning plate 21 is provided in the inner wall surface 20a so as to be adjustable forward and backward with respect to the lenticular plate 4.

The positioning plate 21 is an inner wall surface 20a of the frame body 20.
It has a tubular portion 21a and a flange portion 21b that are slidably fitted in the. The inner wall surface of the tubular portion 21a is a rectangular guide wall so as to be similar to the rectangular lenticular plate 4. An adsorption block 22 having a rectangular cross section is slidably and detachably fitted to the inner wall surface of the cylindrical portion 21a so that there is no gap.

A large number of suction holes 22a for sucking air are formed inside the suction block 22. Many suction holes 2
One end of 2a is open to the front end surface 22b of the suction block 22. The other ends of the suction holes 22a are gathered and open to the rear end of the suction block 22. The front end surface 22b of the suction block 22 is a plane with extremely high precision, and the front end surface 22b can be moved back and forth with respect to the lenticular plate 4 while being parallel to the lenticular plate 4. Protrusions 22c that function as stoppers are provided on both sides of the rear end of the suction block 22. The protrusion 22c positions the photosensitive surface 23a of the film 23 as a photoconductor adsorbed by the front end surface 22b of the suction block 22 when the suction block 22 is inserted into the cylindrical portion 21a of the positioning plate 21. Two
It is located at the position 21c at the front end of the first tubular portion 21b.

Bearings 24 penetrating the flange portion 21b are fixed to both ends of the flange portion 21b of the positioning plate 21, respectively. The bearing 24 slidably holds a guide shaft 25 protruding from the rear wall portion 1d of the camera to the rear of the camera. An adjusting nut 26 is screwed onto the tip of the guide shaft 25. Adjustment nut 26 and bearing 2
A coil spring 27 is provided between the
The positioning plate 21 is urged toward the body 1. The base portion of the guide shaft 25 is fixedly held by a bearing 28 protruding from the rear wall portion 1d of the body 1.

A cam 29 for adjusting the distance of the positioning plate 21 to the lenticular plate 4 is attached to the wall surface of the flange portion 21b on the body 1 side. Cam 2
Reference numeral 9 is a rectangular shape that is long in the vertical direction of the body 1, and is in sliding contact with a cam 30 mounted on the body 1 side. Cam 3
As shown in FIG. 2, sliding bearings 31, 31 are provided on the upper and lower ends of the body 0 on the body 1 side.
A nut type bearing 32 is projected between the two. A guide shaft 33 is slidably held by the sliding bearings 31, 31, and a screw rod 34 is screwed into the bearing 32. Both ends of the guide shaft 33 are the rear wall portion 1 of the body 1.
It is held by bearings 35, 35 protruding from d. Both ends of the screw rod 34 are rotatably held by bearings 36, 36 protruding from the rear wall 1d of the body 1, and a rotation knob 37 is formed at the end of the screw rod 34 protruding from the body 1. There is.

In this embodiment, the space adjusting means S, which is a constituent feature of the present invention, includes a frame body 20, a positioning plate 21, a guide shaft 25, a coil spring 27, a cam 29, a cam 30, a guide shaft 33 and a screw screw. 34, bearings 31 and 32, and a rotary knob 37.
When the rotary knob 37 is rotated, the cam 29 having the tapered surface and the cam 30 are brought into sliding contact with each other so that the positioning plate 21 slides in the front-back direction of the body 1 of the camera. Due to the movement of the positioning plate 21, the position of the front end 21c of the tubular portion 21a moves. At the position of the front end 21c of the positioning plate 21, the suction block 22
When the projection 22c abuts the flange portion 21b by inserting into the inside of the tubular portion 21a, the surface of the ground glass 38 described later is positioned.

Positioning plate 2 with suction block 22 removed
A frame body 39 having a ground glass 38 as an image receiving means shown in FIG. 3 attached to the front end portion is inserted into the inside of the first cylindrical portion 21a. The inside of the frame body 39 is a rectangular space, and the vertically striped subject image of the lenticular plate 4 projected on the frosted glass 38 can be observed from the rear part of the frame body 39. A protrusion 40 that abuts the flange portion 21b of the positioning plate 21 is provided on the rear peripheral portion of the frame body 39, and the frosted glass 38 is fixed to the front end portion of the frame body 39 to fix the positioning plate 2
1 into the tubular portion 21a, and the protrusion 40 is inserted into the flange portion 21.
The surface of the ground glass 38 (for example, the front surface or the back surface on the side of the lenticular plate 4) when brought into contact with b.
Is formed so as to be located at the position of the front end portion 21c of the tubular portion 21a. The surface of the frosted glass 38 is a rough surface to the extent that the subject image converged by the lenticular plate 4 is not formed inside the frosted glass.

When adjusting the facing distance between the lenticular plate 4 and the film 23 with the stereoscopic camera of the present embodiment, first, the frame 39 with the ground glass 38 attached is inserted into the cylindrical portion 21a of the positioning plate 21. To do. At this time, the protrusion 4
The frame body 39 is mounted so that 0 contacts the flange portion 21b of the positioning plate 21, and the surface of the ground glass 38 and the front end portion 21c of the positioning plate 21 are positioned on the same plane. After the surface of the ground glass 38 and the front end portion 21c of the positioning plate 21 are located on the same plane, the photographing lens is directed toward the subject and the shutter of the camera is opened. As a result, the subject image converged by the lenticular plate 4 is projected onto the surface of the ground glass 38. When the vertically striped subject image is projected on the ground glass 38, the thickness of the stripe of the subject image projected on the surface of the ground glass 38 is observed from the opening 39a of the frame 39 through a loupe or the like. Of course, if a magnifying lens is attached to the rear end of the frame 39, the thickness of the stripes can be observed from the rear of the frame 39 without using a magnifying glass or the like.

When the subject image from the lenticular plate 4 converges on the ground glass 38, the thickness of the stripe of the subject image on the ground glass 38 is observed while rotating the rotary knob 37 to the right or left. When rotating the rotary knob 37, while observing the thickness of the stripes on the left and right ends of the ground glass 38, the left and right sides of the camera are adjusted so that the thickness of the stripes on the left and right ends of the ground glass 38 are the same. The rotation knobs 37 provided in the above are rotated simultaneously or individually. Left and right rotary knob 3
By adjusting the rotation amount of 7, when the thickness of the stripes on the left and right ends of the ground glass 38 becomes the same and the thickness of the stripe of the subject image on the ground glass 38 becomes the thinnest, the rotary knob 37
Rotation is stopped, the shutter is closed, and the frame body 39 to which the ground glass 38 is attached is removed from the tubular portion 21a of the positioning plate 21. After removing the frame body 39 from the positioning plate 21, the suction block 22 that has sucked the film 23 is inserted into the cylindrical portion 21 a of the positioning plate 21. Adsorption block 2
2 is inserted into the flange portion 2 of the positioning plate 21.
When it comes into contact with 2b, the photosensitive surface of the film 23 becomes the positioning plate 2
It is located at the position of the front end 21c of No. 1 and at the position where the ground glass 38 was present. As a result, the film 23 is located at a position where the subject image having the sharpest vertical stripe pattern can be captured. In this embodiment, the frosted glass 38 is used as an image receiving means, and the image receiving means is moved toward and away from the lenticular plate 4 by adjusting the positioning plate 21 forward and backward (may be brought into close contact with the lenticular plate 4), so that vertical stripes appearing on the frosted glass 38 The position where the thickness of the line is thinnest is detected, and the image receiving means and the film 23 as the photoconductor are exchanged at this position and the photosensitive surface of the film 23 is changed to the surface of the frosted glass 38 (the lenticular plate 4 side in this embodiment). However, the structure of the interval adjusting means is not limited to this.

FIG. 5 shows a second embodiment of the present invention. In this embodiment, the structure of the body 1 is substantially the same as that of the first embodiment, but the ground glass 41 as the image receiving means and the lenticular plate 4 are used. The structure of the interval adjusting means for moving the valve back and forth is different from that of the first embodiment.

That is, the interval adjusting means of the second embodiment is
A stopper 42 fixed inside the body 1, a bearing member 43 attached to the rear wall portion 1d of the body 1, and a frame body 45 that moves forward and backward in the camera by a screw rod 44 of the bearing member 43. It The stopper 42 is brought into contact with the front end 45 a of the frame body 45 to insert the ground glass holding frame 46 into the frame body 45.
The ground glass 47 (see FIG. 6) is prevented from coming into strong contact with the lenticular plate 4. Bearing member 43
Includes bearing portions 43a, 43a that rotatably support the screw rod 44 in the front-rear direction of the camera,
A screw rod 44 is installed between the bearing portions 43a, 43a. Nut portions 45b, 45b projecting from both sides of the frame 45 are screwed onto the screw rod 44. A rotary knob 48 is provided at the tip of the screw rod 44.
Is provided, and the frame body 45 moves back and forth with respect to the lenticular plate 4 by adjusting the rotation direction of the rotation knob 48 and the rotation amount. The ground glass holding frame 4 is provided on the inner wall surface of the frame body 45.
6 and the suction block 49 are fitted, a guide projection 50 for guiding the ground glass holding frame 46 and the suction block 49 in the front-back direction of the camera is provided so as to extend in the front-back direction of the camera.

The frosted glass holding frame 46 has a rectangular space 46a formed therein, and a frosted glass 47 as an image receiving means is provided at the front end of the frosted glass holding frame 46 with bolts 4.
It is fixed via 7a. On both sides of the ground glass holding frame 46, guide grooves 46b, 46b that are slidably fitted in the guide protrusions 50 of the frame body 45 are formed. The rear end portions of the guide grooves 46b and 46b are stopper portions 46c and 46c that determine the insertion limit of the ground glass holding frame 46, and the guide grooves 46b and 46b insert the ground glass holding frame 46 deepest into the frame body 45. The length is set at the position of the front end 45c of the frame body 45 when this is done. The ground glass holding frame 46 is inserted deepest inside the frame body 46, and the stopper portions 46c, 46c are the guide protrusions 50 of the frame body 45.
Set by touching the rear end of the.

In order to detect the position where the convergent image of the lenticular plate 4 is the sharpest, the ground glass holding frame 46 is set on the frame body 45, the shutter is opened and the left and right rotary knobs 48 are rotated to rotate the lenticular plate. Board 4
The thickness of the stripe of the vertical stripe object image that converges on the ground glass 47 is observed through the. When observing the thickness of the stripe of the subject image projected on the ground-glass 47, it is observed with a loupe or the like through the space 46a of the ground-glass holding frame 46. The rotation of the rotary knob 48 is adjusted and stopped so that the thickness of the left and right stripes of the ground glass 47 becomes uniform at the position where the thickness of the stripe of the subject image projected on the ground glass 47 becomes the smallest. As a result, the position where the convergent image of the lenticular plate 4 is sharpest can be found. After detecting the position where the convergent image of the lenticular plate 4 becomes the sharpest, the shutter is closed and the ground glass holding frame 46 is attached to the frame body 4.
5, the suction block 49 instead of the frame 45
Insert inside.

The suction block 49 has a large number of suction holes 49a on the front end face. The rear end of the suction light 49a is open to the rear end of the suction block 49, and a tube for air suction (not shown) is connected to the suction light 49a.
On both sides of the suction block 49, guide grooves 52 are formed on the front end surface of the suction block 49 for positioning the position of the photosensitive surface of the film 51 as a photoconductor at the position of the front end portion 45a of the frame body 45. There is. The rear end portion of the guide groove 52 is a stopper portion 53, and the stopper portion 53 serves as the frame body 4.
5 comes into contact with the rear end portion of the guide protrusion 50 of the film 5, the film 5
The photosensitive surface 1 is located at the position of the front end portion 45 a of the frame body 45. After capturing the subject image, the suction block 49 is removed from the frame 45 and the film 51 is developed under the condition that the film 51 is not exposed to light. Since the film 51 is photographed at the position where the convergent image of the lenticular plate 4 is clearest, a clear subject image is taken.

In the above embodiment, the photoconductor side is moved back and forth with respect to the lenticular plate.
Needless to say, the side may be moved back and forth with respect to the photoconductor, but as shown in FIG. 7, when the side with respect to the lenticular plate 4 is moved back and forth with respect to the photoconductor, the lens holding frame 6 of the lenticular plate 4 is used. Is divided into two parts in the front-rear direction of the camera, and the front holding frame 6b and the rear holding frame 6c are connected to each other by a guide shaft 52 so as to be able to move in and out.
And the holding frame 6c on the rear side of the coil spring 53
While the cams 54 and 55 provided on both sides are brought into contact with each other by the screw rods 56 and 57 provided on the side portions of the front holding frame 6b, the cam 54 on the front holding frame 6b side is made to come into contact with each other. Up and down to hold the rear holding frame 6
c may be moved back and forth in the front-back direction of the camera. In this case, the upper ends of the screw rods 56 and 57 may be protruded to the outside of the housing of the camera and rotated from the outside of the body 1, but the lens holding frame 6 is slidable left and right. A long hole in the lateral direction of the body 1 is formed in the upper wall of the body 1 so as to allow the slide of 56 and 57 in the lateral direction, and a screw rod is provided to shield the inside of the body from the light entering from the long hole. 5
A light-shielding cover may be provided on 6, 57. If the lenticular plate 4 side is slidably adjusted in the front-rear direction as described above, the frosted glass may be attached to and detached from the opening of the rear wall portion 1d of the body 1, which facilitates loading of the film.

[0030]

As described above, the stereoscopic camera according to the present invention detects the position where the object image of the lenticular plate converges in the sharpest state even if the lenticular plates have different thicknesses. Since the photoconductor can be placed at this position for taking pictures, the stereoscopic picture taken can be made clearer and the three-dimensional effect can be more remarkable, and the relative distance between the lenticular plate and the photoconductor can be adjusted. Therefore, the allowable range of the thickness accuracy of the lenticular plate is increased, the production is facilitated, and the production yield of the lenticular plate is improved. Further, by making the lenticular plate thin, it is possible to shoot in a narrow position, so that the sharpness can be further improved and the shooting rotation angle can be increased, so that the three-dimensional effect can be improved.

[Brief description of the drawings]

FIG. 1 is a plan configuration diagram of a stereoscopic photographing camera according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a rear portion of the body of the stereoscopic camera of the first embodiment.

FIG. 3 is a configuration diagram of a positioning plate of the stereoscopic camera of the first embodiment.

FIG. 4 is a cross-sectional view of a frame body that holds ground glass as image receiving means of the first embodiment.

FIG. 5 is a plan configuration diagram of a stereoscopic photographing camera according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of a frame body that holds the ground glass of the second embodiment.

FIG. 7 is a perspective view showing a configuration of a space adjusting unit according to a third embodiment of the present invention.

[Explanation of symbols]

 4 Lenticular plate 6 Lens holding frame 21 Positioning plate 22 Adsorption block 23 Film 25 Guide shaft 29 Cam 30 Cam 31 Guide shaft 34 Screw rod 38 Ground glass 39 Frame body 43 Bearing member 44 Screw rod 45 Frame body 51 Film 52 Guide shaft 53 Spring 54, 55 cam 56, 57 screw rod S interval adjusting means

Claims (1)

(57) [Claims] 1. A lenticular plate for converging a subject image from a photographic lens in a vertical striped manner is provided inside a body of a camera so as to be slidable in a horizontal direction, and at the rear of the lenticular plate inside the body, A stereoscopic photographing camera in which a photoconductor for exposing the striped subject image is arranged, wherein an image receiving unit for receiving a subject image converged in a vertical striped pattern by the lenticular plate is provided at a rear portion of the body, An interval adjusting means for advancing and retracting the image receiving means with respect to the lenticular plate and a supporting means for supporting the photoconductor against the lenticular plate are provided, and the space adjusting means is provided between the photoconductor and the lenticular plate. A stereoscopic photographing camera characterized in that the supporting means is supported so that a relative facing distance can be adjusted.