JP2730315B2 - 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 camera for taking a three-dimensional image (for example, a three-dimensional photograph) using a lenticular plate.

[0002]

2. Description of the Related Art As a three-dimensional photographing device, Japanese Patent Publication No. Sho 4
One disclosed in Japanese Patent Publication No. 5-23512 is known.

In this patent invention, as shown in FIG. 7, a subject 2 is placed on a turntable 1 and a lenticular plate 3 having cylindrical lenses connected thereto is joined to a photosensitive plate 4. The photosensitive plate 4 to which the center plate 1 is attached is disposed in the camera 5, and the center point 1a of the turntable 1 and the center point 4 of the photosensitive plate 4
The turntable 1 and the camera 5 are paired so that a is positioned on the optical axis of the lens 6 of the camera 5, and the turntable 1 and the photosensitive plate 4 are rotated synchronously, so that the turntable 1 rotates. Accordingly, the peripheral surface of the subject 2 which is displaced is photographed continuously or intermittently on the photosensitive plate 4 sequentially.

According to this photographing apparatus, the reflected light from the part 2a of the peripheral surface of the subject 2 enters the lenticular plate 3 via the lens 6, is refracted by the lenticular plate 3, reaches the photosensitive plate 4, and is exposed to light. The plate 4 is exposed. When the photosensitive plate 4 is exposed, the reflected light of the subject 2 is converged linearly by passing through the cylindrical lens of the lenticular plate 3, and a linear converged image is exposed on the photosensitive plate 4. By rotating the photosensitive plate 4 while the turntable 1 is rotating, the photosensitive plate 4 is exposed to a continuous converged image having parallax.

[0005] Therefore, when the lenticular plate 3 is joined to the developed photo-sensitive plate 4 separated from the lenticular plate 3 at the same pitch, and the lenticular plate 3 is joined by the left and right eyes, the left and right eyes are joined. Shows a converged image enlarged in the width direction by the lenticular plate 3. Since the enlarged converged images viewed by both the left and right eyes have parallax due to the rotation of the turntable 1, the observer of the photograph can see a stereoscopic image.

[0006]

However, in the case of this conventional photographing apparatus, when the photosensitive plate 4 is rotated inside the camera 5 when photographing the subject 2, the reflected light of the subject 2 passes through the photosensitive plate via the lens 6. When the image is formed on the lens 4, the photosensitive plate 4 must be rotated within the allowable range of the depth of field of the camera 5, so that the position of the photosensitive plate 4 with respect to the imaging position of the lens 6 changes. Even if the depth of field is within the allowable range, the size of the subject image to be formed in the vertical direction changes. For this reason, when the observer observes a stereoscopic photograph, there is a problem that a vertical distortion is generated in the stereoscopic image and the stereoscopic image is likely to be unclear.

Therefore, in order to solve such a problem,
The applicant arranges a lenticular plate formed by connecting a large number of vertically extending cylindrical lenses in the horizontal direction at a position forward of the film of the taking lens in the housing of the camera, and passes the image from the taking lens to the lenticular plate. We are researching and developing a method of forming an image on a film through a camera. In this method, shooting is performed while the subject is rotated about a vertical axis, but the speed at which the lenticular plate is moved in the width direction of the cylindrical lens during shooting of the subject is extremely low and constant. It turned out to be difficult to feed the lenticular plate at the speed of.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to improve a conventional photographing apparatus, and when a viewer views a stereoscopic photograph, the stereoscopic image viewed by the observer is sharp and clear without any vertical distortion. In addition, an object of the present invention is to provide a stereoscopic camera in which the horizontal sliding of the lenticular plate is performed at a constant and extremely low speed, and the amount of feed can be accurately detected.

[0009]

In order to achieve the above object, a stereoscopic camera according to the present invention is provided in a rear portion of a housing.
A support for supporting the lenticular plate is slidably disposed from one of the left and right vertical walls to the other vertical wall of the housing, and the support is located on one of the vertical walls. In the vicinity of the vertical wall portion which is always urged in the direction of action of the urging force of the support, a driving cam which moves in the vertical direction by the rotation of the screw screw is disposed, and the driving cam is provided on the support. The driven cam and the driven cam are combined to slide the support body against the urging force via the driven cam by raising or lowering the driving cam. The vertical wall portion is provided with a sensor for detecting the moving amount of the driving cam when the supporting member moves by one pitch of the cylindrical lens against the urging force by raising or lowering the driving cam. .

[0010]

According to the stereoscopic photographing camera of the present invention, the driving cam is sent to the screw to ascend or descend, and as the driving cam rises or descends, the support slides against the urging force via the driven cam. Therefore, the sliding speed of the lenticular plate supported by the support becomes very low and the speed is constant. When the support is slid against the urging force, a sensor is provided in front of the driving cam in the moving direction at this time, and this sensor detects the moving amount of the driving cam. The movement of only minutes can be set accurately.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A stereoscopic camera according to an embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a photographing apparatus for photographing a three-dimensional image using the camera according to the present embodiment . Reference numeral 10 denotes a subject, 11 denotes a subject rotating device, and 12 denotes a lenticular plate slide. A camera 13 having a mechanism is a control device for controlling driving of the subject rotation device 11 and the camera 12. The optical axis of the shooting lens 16 of the camera 12 is the turntable 11
It extends toward the subject 10 of b.

The subject rotation device 11 includes a fixed base 11a provided with casters for positioning and fixed on a floor 14 and moving, a rotating shaft (not shown) disposed in the fixed base 11a and extending vertically. A rotation mechanism (not shown) including a pulse motor for rotating the rotation shaft, a gear mechanism, and the like.
And a turntable 11b as a turntable attached to the upper end of the rotary shaft. The rotating mechanism is a pulse motor M1 driven and controlled by the control device 13.
(See FIG. 5 ) and a speed reduction mechanism for reducing the driving force of the pulse motor M1. A light emitting element L1 connected to the control device 13 is provided on the periphery of the turntable 11b. The fixed base 11a has a flange portion 11c facing the lower surface of the periphery of the turntable 11b.
Are provided with light receiving elements A and B connected to the control device 13.

The light receiving elements A and B face the rotation area of the light emitting element L1. When the light emitting element L1 passes over the light receiving elements A and B, the light from the light emitting element L1 is detected and the control unit 1 detects the light.
Transmit the light receiving signal to 3. The light receiving element A is provided at a fixed position where the turntable 11b moves at a constant speed.
The light receiving element B is installed at a position that makes an angle of 10 degrees with the light receiving element A with the rotation center axis of the rotation axis as the apex. The rotation shaft is rotated by a pulse motor and a reduction mechanism built in the fixed base 11a. The pulse motor inside the fixed base 11a rotates by a predetermined angle at a predetermined speed based on a drive control signal from the control device 13. In this embodiment, the turntable 11b is 1
Performs a constant-speed motion that rotates 10 degrees in 0 seconds, but the actual rotation angle is set to be greater than 10 degrees for start-up rotation that avoids impact at the time of startup and makes constant speed motion. ing.
A table start signal indicating that the turntable 11 has started the constant speed movement by the light receiving element A is output to the control device 13. The control device 13 outputs a photographing signal for opening the shutter to the camera 12 based on the table activation signal.

A photographing lens 16 is provided at the front of the housing 15 of the camera 12.
Is attached. The taking lens 16 is provided with a lens shutter 17. The lens shutter 17 is opened and closed by a shutter opening and closing device controlled by a control signal from the control device 13. A film back FB for mounting a film F at a position where light from the photographing lens 16 of the camera 12 forms an image.
Can be attached detachably. A mounting plate 20 is provided upright in front of the mounting position of the film back FB, and the mounting plate 20 has an opening 20a through which the convergent light from the photographing lens 16 passes. A pair of guide shafts 21a and 21b extending in a direction perpendicular to the optical axis of the photographing lens 16 are provided at upper and lower portions of the opening 20a of the mounting plate 20.
Is provided.

The pair of guide shafts 21a and 21b constitute a part of a slide mechanism S of a frame 22 on which the lenticular plate 21 is mounted. A pair of bearings 23, 2 in which 21b is slidably held
3 are provided, and the frame body 22 is slidable in the left-right direction by the bearings 23, 23. Lenticular board
The slide mechanism 21 includes a pair of guide shafts 21a, 21a and a frame 22.
, A spring 24, a driven cam 25, a screw 28, a driving cam 31, and a pulse motor M2. The lenticular plate 21 mounted on the frame 22 is formed by connecting a large number of vertically extending cylindrical lenses in the horizontal direction. In the present embodiment, one pitch of the cylindrical lenses is set to 0.4 mm. Lenticular board
Numeral 21 is oriented so that the convex surface of the cylindrical lens is positioned on the taking lens 16 side, and is attached to the rear side of the frame plate 22 so that the photosensitive surface of the film F of the film back FB can be in close contact.

The right end of the frame 22 and the right side wall 15a of the housing 15
(Vertical wall portions), compression coil springs 24, 24 are disposed, and the compression coil springs 24, 24
Is urged toward the left side wall portion 15b side (vertical wall portion). A driven cam 25 is attached to the left end of the frame 22. The driven cam 25 has a tapered surface on the left wall 15b side of the housing 15.

A sensor 26 is mounted on the left side wall 15b. A screw is formed around a shaft 26c of the sensor 26, and a shaft 26d is attached to a bearing 26a attached to the mounting plate 20.
Is held . The sensor 26 is provided with a micro switch type touch sensor T , and the sensor 26 is a touch sensor.
Outputs more detection signals to the controller 13 in abutment with the lower end portion 30a of the support T and L-type arm 30. A gear 26b is provided at the lower end of the shaft 26d of the sensor 26 , and the gear 26b is
It meshes with a gear 26c of a handle H provided on 15b. When the handle H is rotated, the shaft 26d of the sensor 26 is rotated via the gears 26b and 26c, and the height of the sensor 26 is adjusted. The distance between the touch sensor T of the sensor 26 and the L-shaped arm 30 when the handle H is rotated and adjusted is displayed on the surface of the left side wall.

A bearing 27 is provided on the left side of the opening 20a of the mounting plate 20. On this bearing 27, a screw screw 28 is rotatably held. Screw screw
A nut 29 is screwed into 28, and the nut 29 is an L-shaped arm
It has 30. At the right end of the L-shaped arm 30, a driving cam 31 that slides up and down on a tapered surface 25a of a driven cam 25 provided on the frame 22 is provided. A guide plate 32 is provided at the left end of the L-shaped arm 30, and the guide plate 32 slides on a guide plate 33 fixed to the left wall portion 15b of the housing 15 and moves up and down. The lower end of the screw 28 is a housing
It is rotatably held by bearings 34 attached to the 15 horizontal walls 15c. The lower end of the screw 28 protrudes below the bearing 34, and a bevel gear 35 is attached to the lower end of the screw 28. A pulse motor M2 is provided below the horizontal plate portion 15c.
A bevel gear 36 is attached to the tip of the rotating shaft.
The bevel gear 36 meshes with the bevel gear 35 of the screw screw 28, rotates the screw screw 28 by rotation of a pulse motor M2 driven by a control signal of the control device 13, moves the nut 29 up and down, and moves the frame plate 22. Move left and right. The pulse motor M2 is attached to an L-shaped bracket 37 fixed to the lower wall 15d of the housing 15.

A camera back (not shown) is attached to the rear end of the housing 15. In this embodiment, the photosensitive surface of the film F mounted on the camera back is in contact with the lenticular plate 21, and the lenticular plate 21 slides on the photosensitive surface of the film F by one pitch of the cylindrical lens during photographing. Note that the photosensitive surface of the film F may not be in contact with the lenticular plate 21 as long as the image forming position of light from the lenticular plate 21 is located on the photosensitive surface of the film F. The film back FB after photographing is separated from the lenticular plate 21, and the photographed film F is developed.
dry.

As shown in the block diagram of FIG. 5 , a light-emitting element L1, a light-receiving element A,
B, a touch sensor T, pulse motors M1, M2, and a shutter opening / closing device are connected. When a sensor is provided above the sensor 26, it goes without saying that a touch sensor (not shown) of the sensor above the sensor 26 is also connected to the control device 13. In the present embodiment, the rotation speed and the number of rotations of the pulse motor M1 set in the control device 13 are controlled by the turntable 11b.
Is set to rotate 10 degrees in 10 seconds. Control device
The rotation speed and the number of rotations of the pulse motor M2 set to 13 are set so that the frame 22 moves one pitch (0.4 mm) of the cylindrical lens in 10 seconds. In the control device 13,
When the power is turned on, the light emitting element L1, the light receiving elements A and B, the touch sensor T of the sensor, the pulse motors M1 and M2, and the shutter opening / closing device rise as shown in the flowchart of FIG .

FIG . 6 shows a pulse motor M by the control device 13 .
1, M2, a flow chart of the activation state of the shutter opening and closing device. When the main switch is turned on after the control device 13 starts up, the light emitting element L1 is turned on and the pulse motor M1 is turned on. Rotate. Pulse motor M1
Rotates and the backlash of the gear mechanism is eliminated,
The turntable 11b performs a constant speed rotation motion. The constant speed rotation of the turntable 11b is detected by the light receiving element A. Immediately after the pulse motor M2 that slides the frame 22 is rotated by the detection signal of the light receiving element A, the shutter opening / closing device is driven to open the shutter. By this
Te, lenticular plate 21 during rotation of the Turn-down table 11b
Slides horizontally . Data L-shaped arm 30 is lowered
When the sensor 26 detects the detection signal in contact with the touch sensor T , the lenticular plate 21
Since it slides horizontally by the pitch, a signal to close the shutter is output to the shutter opening / closing device. When the shutter is closed, the pulse motor M2 temporarily stops and then reverses the predetermined rotation speed. The movement of the frame 22 and the turntable 11
Since the rotations of b are substantially synchronized, when the shutter is closed, the light receiving element B detects the irradiation light of the light emitting element L1, the pulse motor M1 stops, and the turntable 11b stops.

Thus, the converged image of the subject 10 is exposed on the film F of the film back FB.
Therefore, in this state, the film back FB is taken out,
When developed in a dark room, an original photograph of a stereoscopic image is taken on the film F.

When a predetermined time elapses after the film back FB is taken out, the pulse motor M1 rotates reversely and the light receiving element A
Detects the light of the light emitting element L1, the pulse motor M1 is stopped, the light emitting element L1 is turned off, and the main switch is turned off.

In the three-dimensional image camera of this embodiment, when the lenticular plate 21 is slid, the lenticular plate 21 is moved by the driven cam 25 and the driving cam 31 rotated by the screw 28, so that the sliding speed of the lenticular plate 21 is kept constant. Very slow speeds can be used. In addition, since the slide amount of the driving cam 31 is detected by the contact between the sensor 26 and the L-shaped arm 30, the feed amount of the lenticular plate 21 can be accurately detected.

When three-dimensional photography is performed by the camera 12 of the present embodiment, the shutter of the camera 12 is opened while the film F is fixed while the turntable 11 is rotating at a constant speed. In the state, lenticular plate 21
Is moved in the horizontal direction (horizontal direction) by one pitch at a constant speed. Thereby, the linear converged image converged on the cylindrical lens is continuously exposed on the photosensitive surface. Therefore, after the film F is developed, fixed, and dried to obtain a photograph of the same magnification, the lenticular plate 21 is joined and joined so that the cylindrical lens extends in the vertical direction on the photograph and has the same pitch. Thus, when a display or the like is created, images observed by both eyes of the observer have parallax, and the observer can visually recognize a three-dimensional image.

Since a continuous convergent image is exposed in a stepless manner during one pitch, a three-dimensional image can be seen even when an observer views the display from different angles. The visible angle (range) is enlarged. This is significantly different from the case where the shutter of the camera 12 is periodically opened and closed at a low speed when the turntable 11b rotates. That is, when the shutter is opened and closed at a low speed, an unexposed portion when the shutter is closed linearly occurs within one pitch of the film F during a converged image taken. Therefore, when the shutter is opened and closed periodically, a white line may be seen during the display depending on the viewing angle of the completed display.

However, when the shutter is opened or continuously opened and closed at a high speed as described above, the film F is exposed because a stepless or substantially stepless continuous convergent image is exposed on the film F. When viewing the display, white lines do not appear depending on the viewing angle.

Further, since the lenticular plate 21 is moved in the horizontal direction, the image forming position of the object image condensed through the photographing lens of the camera 12 is substantially invariable. The distortion is eliminated, and the resulting stereoscopic image of the display is clear and very clear without distortion.

[0030]

According to the stereoscopic photographing camera of the present invention, when the observer views a stereoscopic photograph, the sharpness of the stereoscopic image seen by the observer can be improved, and the horizontal sliding of the lenticular plate can be kept constant. At very low speed, and the feed amount can be accurately detected.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a rear structure of a camera according to an embodiment of the present invention.

FIG. 2 is a schematic explanatory diagram of a stereoscopic photographing apparatus according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a state in which a converged image is exposed on a film when a lenticular plate slides according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a positional relationship between a light emitting element and a light receiving element of the turntable shown in FIG.

FIG. 5 is a block diagram of a control device according to the present embodiment.

FIG. 6 is a flowchart of a control device according to the present embodiment.

FIG. 7 is an explanatory diagram of a conventional stereoscopic image capturing method.

[Explanation of symbols]

 10 ... Subject 11 ... Subject drive 11b ... Turn table 12 ... Camera 13 ... Control device M1 ... Pulse motor S ... Slide mechanism 21 ... Lenticular plate 21a ... Guide shaft 22 ... Frame 24 ... Spring 25 ... Driving cam 28 ... Screw screw 31: driving cam 35, 36: bevel gear M2: pulse motor T: touch sensor L1: light emitting element A, B: light receiving element F: film FB: film back

Claims (1)

(57) [Claims] 1. A lenticular plate comprising a plurality of vertically extending cylindrical lenses connected in a horizontal direction is disposed at a position forward of a film of a photographing lens in a housing, and an image from the photographing lens is passed through the lenticular plate. A stereoscopic camera that forms an image on a film, wherein a support that supports the lenticular plate is slidable from one of the left and right vertical wall portions of the housing toward the other vertical wall portion in the rear portion of the housing. In addition, the support is always urged to be located on one of the vertical wall portions side, near the vertical wall portion located in the direction of action of the urging force of the support,
A driving cam that moves in the vertical direction by the rotation of the screw is provided, and a driven cam that is always in contact with the driving cam is provided on the support, and the driving cam and the driven cam are moved up or down by the driving cam. And the support is slid via the driven cam against the urging force, and the support is moved up or down on the vertical wall portion where the drive cam is located. A stereoscopic camera, comprising: a sensor for detecting a moving amount of the driving cam when the cylindrical lens moves by one pitch of the cylindrical lens against an urging force.