JPH07128758A - Stereo adapter - Google Patents

Abstract

PURPOSE:To provide a stereo adapter excellent in a stereoscopic effect in the case of viewing a stereo-photographed picture by using a stereo viewer. CONSTITUTION:The opening angle of right and left mirrors 42 faced to the subject in an optical system for a stereo adapter is made variable, so that the stereoscopic effect of the stereophotographed picture is changed. The stereo photographing is performed in a state where the opening angle of the right and the left mirrors 42, etc., is fixed by a stopper member 56 so that an interval between the main parts of the right and the left images of the stereo- photographed picture may be almost 45mm in the case of an L print 80.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereo adapter, and more particularly to a stereo adapter mounted on the front surface of a box-shaped camera body.

[0002]

2. Description of the Related Art In order to take a stereo picture using a normal camera, a stereo adapter is mounted on the front surface of a taking lens. Stereo adapter 2 pairs left and right (4 pieces)
The light of the subject image incident on the lens optical path is separated into two subject images, and two subject images on the left and right are formed on one frame of the film. In addition, various stereo adapters in which a stereo adapter is integrally attached and used on the front surface of a camera and a stereo camera in which a camera and a stereo adapter are integrated have been proposed.

[0003]

However, if the distance between the images of the left and right main subjects in the stereo-printed printed photograph is too far or too close, the stereoscopic effect when looking at the photograph with a stereo viewer becomes poor. There are drawbacks.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a stereo adapter having a good stereoscopic effect when a stereoscopic photograph is viewed by a stereo viewer.

[0004]

In order to achieve the above object, the present invention provides a stereo adapter mounted on the front surface of a taking lens of a box-type camera for taking a stereo image. A free stereo adapter body, and a first optical system including a pair of mirrors that are swingably provided on both sides of the stereo adapter body and guide light of a subject image from both sides to the front of the photographing lens of the camera. A second optical system provided on the stereo adapter body so as to be located in front of the taking lens, and guiding the light of two object images from the first optical system to the taking lens of the camera; and the stereo adapter body. Provided between the left and right main subject images formed on one frame of the film with the opening angle of the pair of mirrors of the first optical system set to a predetermined value suitable for stereo photography. It is characterized with a locking member for holding the made such an angle, that consist.

[0005]

According to the present invention, the pair of mirrors constituting the first optical system can be rocked so that the opening angle of the mirrors can be varied, and the opening angle of the pair of mirrors can be adjusted to one frame of the film. A locking member is provided to hold the left and right main subject images formed at a predetermined angle suitable for stereo photography. As a result, it is possible to fix the opening angle of the mirror to an optimum angle for stereo photography.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a stereo adapter according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a perspective view showing a state before the stereo adapter 10 is attached to the lens-equipped film unit 12. 2 is a front view of the stereo adapter 10 mounted on the lens-equipped film unit 12, and FIG. 3 is a perspective view of the stereo adapter 10 mounted on the lens-equipped film unit 12 as viewed from the rear side. . FIG. 4 is a sectional view taken along a horizontal plane including the optical axis of the taking lens.

First, the film unit with lens 12 to which the stereo adapter 10 is attached will be described. This film unit with lens 12 is formed in a box shape,
Plastic unit body 14, front cover 16,
The back cover 18 is a main member. A cartridge chamber 20 and a film chamber 22 are formed on the left and right sides of the unit main body portion 14, and a grip portion 24 having a substantially arcuate cross section is formed on the cartridge chamber 20 side of the front cover 16 so as to easily hold the camera. Has been done. Further, the front cover 16 holds a plastic taking lens 26 via a convex lens holder 27. As for the surface shape of the lens holder 27, as shown in FIG. 1, the left side portion 27A is formed in a rectangular shape and the right side portion 27B is formed in a semicircular shape.
The left side portion 27A of the lens holder 27 can prevent rotation of the stereo adapter for accurate positioning. A finder 28 (see FIGS. 1 and 3) is arranged above the taking lens 26, and a shutter 32 (see FIGS. 1 to 3) and a film winding mechanism 34 (see FIG. 3) are provided on the side of the cartridge chamber 20. (See) is located.

Further, the front cover 16 and the back cover 18 are joined to the unit main body 14 from the front and back and then fixed by ultrasonic welding or the like. The user inserts a film (not shown) in the cartridge chamber 20 and the film chamber 22. It cannot be taken out. In addition, the film unit with a lens mainly includes the photographic lens 2 by the package 36.
6, the entire unit is packaged except for the location where the finder 28 and the strobe 30 are provided. The package 36 is formed of a printable cardboard, a thin plastic sheet, or the like. The surface of the package 36 is printed with instructions for use of the lens-fitted film unit 12 and various other designs.

Next, the stereo adapter 10 of the present invention will be described. As shown in FIG. 1, the stereo adapter 10 includes a detachable stereo adapter body 38 mounted on the front surface of the lens-equipped film unit 12, and a band for attaching the stereo adapter body 38 to the lens-equipped film unit 12. And a member 40. The stereo adapter body 38 includes a stereo adapter optical system including four mirrors, a pair of first mirrors 42 and 44 and a pair of second mirrors 46 and 48, and these mirrors 42, 44, 46 and 48. And a substrate 50 for holding at a predetermined position. A top plate 52 and a bottom plate 54 are formed above and below the substrate 50, and the first mirror 4
2, 44 are shafts 42 at the left and right ends of the upper plate 52 and the bottom plate 54.
It is adhered to the inner side surfaces of the mirror support plates 43 and 45 which are swingably supported via A and 44A. Also, FIG.
In the stereo adapter optical system, the mirrors 42 and 44 are formed asymmetrically with respect to the taking lens 26 so that the light emitted from the strobe 30 of the lens-equipped film unit 12 is not blocked by the mirror 44, as shown in FIG.
That is, the first mirrors 42 and 44 are arranged at positions asymmetric with respect to the taking lens 26, and the size of the mirror 44 is smaller than that of the mirror 42. Further, as shown in FIG. 1, a substantially triangular light-shielding cover is provided on the upper edge of the mirror support plate 45 that supports the mirror 44 on the side of the strobe 30 to prevent light emitted from the strobe 30 from entering the taking lens 26. 41 is provided.

Further, as shown in FIGS. 2, 4 and 5, locking claws 56, 56 for holding the opening angles of the first mirrors 42, 44 at a predetermined angle are provided at both ends of the substrate 50. Has been. Further, the locking claw 56 is formed by making two parallel notches 61 from the end of the substrate 50 as shown in FIG. 5, and the tip 56A of the locking claw 56 is formed in a hook shape. There is. On the other hand, a concave engagement groove 63 with which the front end portion 56 of the locking claw 56 is engaged is formed at the rear end portion of the mirror support plate 43 that supports the mirror 42. Further, as shown in FIG. 6, the end of the substrate 50 where the notch 61 is cut and the rear end of the mirror support plate 43 are rotated at a predetermined opening angle when the mirror 42 is rotated in the opening direction. The taper 61A is formed so as to stop at. As a result, when the mirror 42 is rotated in the opening direction, the mirror 42 comes into contact with the taper 61A of the substrate 50 to control the rotation, and the locking claw 56 elastically deforms and spreads around the base end portion, The tip portion 56A of the locking claw 56 engages with the engagement groove of the mirror 42, and the mirror 42 is held at a predetermined angle. Further, when the mirror 42 is swung in the closing direction, the locking claw 56 is elastically deformed again and the tip portion 56A thereof is easily disengaged from the engagement groove 63. This locking mechanism is the same for the mirror 44. The opening angle of the first mirrors 42, 44 held at a predetermined angle by the locking claws 56 is, for example, the distance between the main portions 79, 79 of the left and right images of the stereoscopic photograph 80 as shown in FIG. , L print (service size print) photograph 80 is set to be 45 mm. At this time, if the opening angle of the first mirrors 42 and 44 is the dimension shown in FIG.
And the mirror 44 is held at 43 °. Then, when stereo shooting is performed up to a distance of the subject at 2 m, the distance between the subject images formed on the left and right of one frame 86 of the film is 11.8 mm, which corresponds to 45 mm in the case of the L print photograph 80. .

Further, as shown in FIG. 1, at the center of the substrate 50, there is formed an opening 58 for a photographing lens which is fitted to the outer periphery of the convex lens holder 27. Board 5
The 0 opening is formed by a rectangular portion 58A and a circular arc portion 58B corresponding to the shape of the lens holder 27.
Thus, when the lens holder 27 of the lens-equipped film unit 12 is inserted into the opening 58 of the substrate 50, the lens-equipped film unit 12 of the stereo adapter 10 is inserted.
Vertical, horizontal, and horizontal positioning will be performed. Further, second mirrors 46 and 48 held by a holding member 60 having a V-shaped cross section are arranged at a position corresponding to the taking lens 26 on the substrate 50. Second mirror 46, 48
Is arranged at an inclination angle of about 45 °, and the light of the two object images from the first mirrors 42 and 44 is taken by the taking lens 26.
It is reflected toward the film in the film unit 12 with a lens via. Further, in FIG. 4, a concave portion 64 that fits the convex grip portion 24 is formed on the left side of the substrate 50, that is, at a position corresponding to the grip portion 24 of the lens-equipped film unit 12.

As shown in FIG. 2, an objective lens side opening 62 of the finder 28 is formed in the center of the upper portion of the substrate 50, and the objective lens side opening 62 is a lateral view frame of the finder 28. Is formed in a vertically long opening that narrows the area to about 1/2. On the other hand, as shown in FIG. 1, the band member 40 is formed in a band shape with a plastic material having a length to be suspended on the lens-equipped film unit 12, and one end 66 thereof is fixed to the upper bent portion 52 of the substrate 50. The stop hole 70 formed at the other end 68 is detachably fitted to the protrusion 72 formed on the lower bent portion 54 of the substrate 50. When fixing the stereo adapter body 38 mounted on the lens-equipped film unit 12, the band member 40 is hung on the lens-equipped film unit 12 to secure the stop hole 70.
Are fitted to the protrusions 72. Also, the stereo adapter body 3
When removing 8 from the film unit with lens 12, the stopper hole 70 is removed from the protrusion 72. Further, as shown in FIGS. 1 and 3, the finder 2 in the band member 40 is
An eyepiece side opening 74 of the finder 28 is formed at a position corresponding to 8.

Next, the operation of the stereo adapter 10 of the present invention constructed as above will be described. When the stereo adapter body 38 is attached to the lens-fitted film unit 12, the opening 58 of the stereo adapter body 38 is used.
The lens holder portion 27 of the lens-equipped film unit 12 is fitted to the lens holder 27, and the convex grip portion 24 of the lens-equipped film unit is fitted to the concave portion 64 of the stereo adapter body portion 38. In this state, the band member 4
0 is hung on the film unit with lens 12 and the stopper hole 70 is fitted into the protrusion 72, and the stereo adapter body 3
8 is attached to the film unit with lens 12. At this time, the stereo adapter main body portion 38 is pressed against the front surface of the lens-equipped film unit 12 and is accurately positioned with respect to the lens-equipped film unit 12.

Next, the first of the stereo adapter body 38
The mirrors 42 and 44 are swung in the opening direction until they come into contact with the locking claws 56, and the locking claws 56 are locked so that the opening angle is maintained at a predetermined angle, and the stereo photographing is possible. In stereo photography, as shown in FIG. 4, two mirror images 42, 44, 46, and 48 of the optical system for stereo adapter separate the two subject images incident on the lens optical path of the lens-equipped film unit 12 into left and right, and then the film. This is performed by forming two left and right subject images on one frame. That is, the left half of the taking lens 26 forms a subject image in a predetermined range centered on the optical axis I ₁ on the right half of one frame of the film by the first mirror 42 and the third mirror 46 of the stereo adapter 20, In the right half of the taking lens 26, the second mirror 44 and the fourth mirror 48 of the stereo adapter 10 form a subject image in a predetermined range centered on the optical axis I ₂ on the film 1.
By forming an image on the left half of the frame, the subject is photographed from a position separated by the distance L between the left and right optical axes I ₁ and I ₂ , and is imaged on the left and right of one frame of the film, respectively. At this time, since the opening angles of the first mirrors 42 and 44 are maintained at a predetermined angle for the L print photograph suitable for the stereo photograph, when the stereo photographed L print photograph 80 is viewed by the stereo viewer, it is preferable. It is possible to obtain a three-dimensional effect.

In this embodiment, the L print photograph 80 is used.
It has been described that the locking angles of the first mirrors 42 and 44 are held at a predetermined angle by the locking claw 56 so as to perform stereo shooting, but the shooting is not limited to this opening angle. That is, in the stereo adapter 10 of the present invention, since the opening angles of the first mirrors 42 and 44 can be arbitrarily changed, the stereoscopic effect of a stereoscopic photograph can be changed, and further, the mirror 42 with respect to the subject can be changed. And mirror 44
It is also possible to take a picture in which the subject is artificially deformed by changing the angle of.

Further, in this embodiment, the first mirrors 42, 4
Although the opening angle of No. 4 is adapted to the L print by the locking claw 56, it is not limited to the L print.
Further, in this embodiment, as the stereo adapter optical system,
Although the four mirrors 42, 44, 46, and 48 are used, the present invention is not limited to this, and glass or resin vapor deposition prisms may be used instead of the second mirrors 46 and 48.

[0017]

As described above, according to the stereo adapter of the present invention, the pair of mirrors forming the first optical system can be swung to change the opening angle of the mirrors. A locking member for holding the opening angle of the pair of mirrors at an angle suitable for stereo photography was provided. This improves the stereoscopic effect of a photograph taken in stereo.

[Brief description of drawings]

FIG. 1 is a perspective view before mounting a stereo adapter according to the present invention on a camera body.

FIG. 2 is a front view showing a state in which a stereo adapter according to the present invention is attached to a camera body.

FIG. 3 is a rear view of a stereo adapter according to the present invention mounted on a camera body.

4 is a sectional view taken along a horizontal plane including the optical axis of the taking lens of FIG.

FIG. 5 is a perspective view illustrating an engaging mechanism of a locking claw that holds the opening angle of the first mirror at a predetermined angle.

FIG. 6 is a view showing when the first mirror is swung in the opening direction,
FIG. 5 is a horizontal cross-sectional view for explaining the swing stop mechanism.

FIG. 7 is an explanatory diagram illustrating a stereoscopic photograph when stereoscopic photographing is performed by holding the opening angle of the first mirror with a locking claw at a predetermined angle.

FIG. 8 is an explanatory view illustrating an opening angle of the first mirror when taking the stereo photograph of FIG. 7.

[Explanation of symbols]

10 ... Stereo adapter 12 ... Film unit with lens 28 ... Finder 40 ... Band member 40A, 40B, 40C, 40D ... Bending position of band member 42, 44 ... 1st mirror 42A, 44A ... Shaft 46 of 1st mirror 46, 48 ... Second mirror 56 ... Locking claw 63 ... Locking groove 80 ... L print photograph

Claims (1)

[Claims] 1. A stereo adapter mounted on the front surface of a photographing lens of a box-type camera for stereo photography, wherein a detachable stereo adapter main body portion mounted on the front surface of the photographing lens, and both sides of the stereo adapter main body portion. A first optical system that is swingably provided to guide the light of the subject image from both sides to the front of the taking lens of the camera; and the stereo adapter body so as to be positioned in front of the taking lens. A second optical system that is provided to guide the light of the two subject images from the first optical system to the taking lens of the camera; and a pair of mirrors of the first optical system that is provided to the stereo adapter body. And a locking member that holds the opening angle of the left and right main subject images formed on one frame of the film at a predetermined value suitable for stereo photography. Stereo adapter which is characterized the door.