JPH0973047A - Stereoscopic viewer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop film exposed by using a stereoscopic camera and to easily and stereoscopically view a video on the film as it is. SOLUTION: This stereoscopic viewer for stereooscoically viewing the video on the film A exposed by using the stereoscopic camera is provided with a dark room box 1 where a pair of right and left oculars 20a is disposed on its front surface and a lighting part 2b is formed on its rear surface, a film guiding means 11 guiding the film A so as to fold it in a V-shape or a U-shape in planar vision in the box 1, and a pair of right and left mirrors 15 disposed on both sides of the folded part of the film A in the box 1 and reflecting the videos of required frames positioned on both sides of the folded part toward the right and left oculars 20a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereo viewer for stereoscopically viewing a film image taken by a stereo camera.

[0002]

2. Description of the Related Art A rearist stereo camera (01) having a right lens (02) and a left lens (03) as shown in FIG.
When the subject (04) is photographed by, the photosensitive material surface of the film (A) as shown in FIG. 11 stored in the stereo camera (01)
The right image (C) is taken at the nth frame in (B), and the left image (D) is taken at the (n + 3) th frame. Here, the right image is an inverted image photographed on the film (A) through the right lens (02), and the left image is also photographed on the film (A) through the left lens (03). It is an inverted image.

Conventionally, in order to stereoscopically view the right image (C) and the left image (D) photographed on the film (A) in this way,
A stereo viewer (05) as shown in FIG. 12 was used.

(06) is a frame (n) of the right image (C) and a frame (n + 3) of the left image (D) cut out from the developed film (A).
It is a mount film in which and are attached in an appropriate arrangement. When the tops (n) (n + 3) are attached to the mount film (06), the tops, bottoms, left and right spaces of the tops (n) (n + 3) must be accurately arranged.

Reference numeral (07) is a storage section (08) for storing the mount film (06) and a pair of left and right eyepieces (09) and (010).
A viewer having and a mount fulm as described above (06)
After storing in the storage section (08), the viewer can see the left and right eyepieces.
By looking at (09) and (010), the images (C) and (D) can be viewed in three dimensions.

[0006]

The mounting device (0
In 5), from the film (A), the right image (C) and the left image
It is necessary to cut out the frames (n) (n + 3) taken by (D) and properly attach these to the mount film (06), which is a troublesome work, and more
The mount film (06) must be manufactured, and if there are many mount films (06), it will be very troublesome.

In addition, the frame cut from the film (A)
When attaching (n) (n + 3) to the mount film (06),
If the top, bottom, front, back, left and right spacing of each frame (n) (n + 3) is incorrect, the image cannot be viewed three-dimensionally. Moreover,
The mount (08) of the viewer (07) contains one mount film
Since you can only store (06), if there are multiple mount films (06) you want to watch, you must replace the mount film (06) stored in the viewer (07) with a new mount film (06). No, it was not easy to use.

The present invention has been made in view of the above-mentioned problems, and involves developing a film photographed by a stereo camera and producing a large number of images in the film, which is troublesome. Instead, the purpose is to provide a stereo viewer that can be continuously viewed in three dimensions.

In addition, in addition to the simplification of the structure, the ease of handling, and the like, it is another object of the present invention to enable stereoscopic viewing of films having different photographing systems.

[0010]

According to the present invention, the above problems can be solved as follows. (1) A stereo viewer for stereoscopically viewing a film image taken by a stereo camera, in which a pair of left and right eyepieces are arranged on the front surface and a dark room box on the rear surface is formed. And a film guiding means for guiding the film so as to be folded back into a V-shape or a U-shape in plan view in the darkroom box, and disposed on both sides of the folded-back portion of the film in the darkroom box, on both sides of the folded-back portion. A stereo viewer for three-dimensionally viewing a subject transferred to a film, which is provided with a pair of left and right mirrors for reflecting an image of a required frame located at the right and left eyepieces, and a stereo viewer. A guide member that engages with the forward-facing film and directs the film backward and obliquely backward, and expands forwardly behind the guiding member and outside the film. A pair of left and right mirrors standing upright to form an eight-shape and facing the left and right images of the film, whose inner surface is a mirror surface, the mirror and the guide member are housed, and an opening is formed on the back surface. A portion is provided, and a dark room box provided with a pair of left and right eyepieces facing the mirror is provided on the front surface.

(2) In the above item (1), the film is moved from one end side to the other end side by rotating a take-up cylinder having both ends of the film fixed to both sides of the darkroom box. And a winding means adapted to feed from the other end side to the one end side.

(3) In the above item (1) or (2), the dark room box includes a back plate having a daylighting section, an inner frame having a front surface and a rear surface opened, and the back surface covered by the back plate. ,
The front frame is slidably fitted in the middle frame in the front-rear direction, and is provided between the front frame and the middle frame, and the front frame is provided with a pair of eyepieces on the front surface. And a front-back adjusting means for moving the back-and-forth relative to each other.

(4) In any one of the above items (2) to (3), the front-rear movement adjusting means is provided in either the middle frame or the front frame and is oriented in the front-rear direction. It is rotatable by a knob and meshes with the rack.

(5) In any one of the above items (1) to (4), the darkroom box is provided with a lens spacing adjusting means for adjusting the spacing between the eyepieces.

(6) In any one of the above items (1) to (5), a lighting device is provided in the daylighting section of the darkroom box.

(7) In any one of the above items (1) to (6), the illuminating device includes a light guide body that enters the inside of the folded portion of the film.

(8) In any one of the above items (1) to (7), position adjusting means for adjusting the position of each mirror with respect to the darkroom box is provided.

(9) In any one of the above items (1) to (8), the position adjusting means adjusts the position of each mirror in the left-right direction.

(10) In any one of the above items (1) to (9), the position adjusting means adjusts the position of each mirror in parallel with the linear portions on both sides of the folded portion of the film.

[0020]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show the first embodiment of the present invention.
(Examples of the invention according to claims 1 to 5, 8 and 9)
FIG. 3 is an exploded perspective view of FIG. This stereo viewer is a backboard
It has a darkroom box (1) which can be disassembled into (2), an intermediate part (12) and a front part (18).

First, the structure of the back plate (2) will be described. The back plate (2) has a rectangular shape when viewed from the front, and the upper left and right 2
Fitting holes (2a) (2a) are formed at the places. A top plate (3) having a trapezoidal shape in plan view extends forward from the upper end of the back plate (2), and horizontal support plates (5) facing forward from both sides.
Arms (4) and (4) having (5) extend to both sides.

Two racks (6) and (6) facing the front-rear direction are fixed to the upper surface of the upper plate (3), and the poles (7) are attached to the upper surfaces of the support plates (5) and (5). (7) is erected. Each pole
(7) The winding cylinder (8a) of the winding means (8) is rotatably fitted on the outside of (7).

(A) is a film similar to the above-mentioned conventional example, both ends of which are fastened to the left and right winding cylinders (8a) (8a),
And it is wound around them. In the central part of the back plate (2),
A vertically elongated mere through hole (2b) forming a daylighting section is bored, and substantially triangular fixing plates (9), (9) are forward from the upper edge and the lower edge of the through hole (2b). It is extended. Upper and lower fixing plates
(9) A translucent milky white diffuser plate (10) (10) is arranged between the hypotenuses of the (9), while the film (A) is seen between the tops of the front ends in a plan view V. A central roller (11) forming a film guiding means for guiding in a letter shape is pivotally installed.

Next, the structure of the intermediate portion (12) will be described.
(13) is a substantially box-shaped middle frame with an opening in the center of the rear surface and the front surface, and its top plate (13a) is rectangular in plan view, while the bottom plate (13b) is convex in plan view. . Bottom plate (13b) and top plate (1
Side plates (13c) (13c) are provided between both side edges with (3a), and rear side plates (13d) (13d) leading to the upper plate (13a) are provided on both sides of the rear edge of the bottom plate (13b). Is erected. (13e) (13e) is the back plate
It is a protruding piece fitted in the fitting hole (2a) (2a) of (2).

(14) (14) are the rear end of the bottom plate (13b) and the upper plate (13).
Rollers that are pivotally provided in the left-right direction with respect to each other with respect to a). In front of the rollers (14) (14), a pair of left and right mirrors (15) (15) whose inner surface is a mirror surface.
, Are provided so as to form an eight-character shape that expands forward in a plan view.

Each mirror (15) is provided with a long hole (15b) directed in the left-right direction in a mounting piece (15a) continuously provided at the lower end thereof, and the long hole is formed.
The set screw (15c) inserted through (15b) is tightened to the bottom plate (13b) to adjust the position in the left-right direction. That is, by the long hole (15b) and the set screw (15c),
A horizontal position adjusting means for the mirror (15) is formed.

Numerals (16) and (16) are arranged on both sides of the roller (11) in parallel with the straight line portion of the film (A) directed to the rear outer side and are arranged inside the mirrors (15) and (15). It is the mask. A gap into which the roller (11) can enter is formed between the front ends. The masks (16) and (16) are formed of a light-shielding material, and have windows (16a) and (16a) having the same shape and size as one frame of the film (A). Window (16a) (16
Light-shielding plates (16b) (16b) for blocking light traveling from the rear are continuously provided at the front edge of (a).

(17) (17) are guide poles, one end of which is fixed to the lower surface of the upper plate (13a), and form a part of the guiding means of the film (A).

Finally, the structure of the front part (18) will be described. Reference numeral (19) is a front frame that is fitted in the middle frame (13) so as to be slidable in the front-rear direction and covers the front surface of the middle frame (13). The front frame (19) has an opening at its rear surface, and the front plate (19a) has an eyepiece part consisting of a pair of left and right eyepieces (20a) and a cylindrical holder (20b) for supporting the same. (20) is provided. On the rear edges of both side plates (19b) (19b), there is a slit facing forward.
(19c) and (19c) are formed.

The details of the mounting structure of the front frame (19) and the eyepiece part (20) are shown in FIG. FIG. 2 shows the front plate (19a) of the front frame (19).
FIG. 3 is an enlarged view of a part of the front surface of the front plate (19a) with two long holes (19b) long in the left-right direction, and each long hole (19d) has a holder. (20b) is fitted so as to be slidable in the left-right direction. The center of the pivot link (23), which is oriented in the up-down direction, is pivotally attached to the front plate (19a) by a shaft (22), and each end of the pivot link (23) is connected to the connecting link.
By connecting the left and right holders (20b) with (21), the left and right eyepieces (20), (20) can be adjusted in position inward and outward in synchronization with each other.

(24) is a front-back adjusting means for moving the front frame (19) back and forth with respect to the middle frame (13), and is a rotary shaft (24a which penetrates the upper portions of both side plates (19b) of the front frame (19). ), The pinion (25) (25) that meshes with the above-mentioned rack (6) (6) is fixedly fitted, and the knob (24a) provided at one end of the rotating shaft is rotated, thereby the rack (6)
According to (6), the pinion (25) (25) can be rolled to move the front frame (19) back and forth.

A knob (24c) is screwed to the other end of the rotary shaft (24a), and the front frame is tightened by tightening the knob (24c).
The side plate (19b) of (19) is pinched by the knob (24c) and the shoulder portion (not shown) of the rotary shaft (24a) to prevent the rotary shaft (24a) from rotating and the position of the front frame (19). Can be fixed.

In order to assemble the back plate (2), the intermediate part (12) and the front part (18), the projecting pieces (13e) (13e) of the middle frame (13) are attached to the back plate.
The rack that fits in the fitting holes (2a) and (2a) of (2) and that is the upper plate (3)
(6) (6) and the pinion (25) (25) of the front frame (19) are meshed with each other, while the slits (21c) (21c) are fitted to the upper plate (3), the front frame (19) May be fitted to the middle frame (13).

Next, the operation procedure of the stereo viewer of this embodiment will be described mainly with reference to FIG.

The film (A) has the photosensitive material surface (B) facing the front side, and the up and down direction is opposite to the state of FIG. Originally, the masks (16) and (16) are arranged on the side of the film (A) near the roller (11), but the frames (E) and (F)
Since a window (15a) is drilled in the part facing
When light enters from (2b), the right image on the film (A)
(C) and the left image (D) are imaged on the mirror surfaces of the mirrors (15), (15) with the left and right directions being opposite to those on the film (A).
The images (not shown) taken on other frames are masked.
(16) (16) prevents the mirror (15) (15) from being seen. Left and right images (C ') reflected in the mirrors (15) (15)
By viewing (D ′) through the left and right eyepieces (20b) and (20b) respectively, the viewer can stereoscopically view the image captured on the film (A).

In this embodiment, it is assumed that the right image and the left image of the same subject are photographed at intervals of two frames, that is, the film photographed by the rearist stereo camera is used. The mirrors (15) and (15), the masks (16) and (16), and the rollers (11) are arranged.However, when using a film taken by another method, for example, a Nimuslo stereo camera, The positions of the mirrors (15) and (15), the masks (16) and (16), the rollers (11), etc. may be determined according to the distance between the frames of the right image and the left image.

According to this embodiment, since the film (A) photographed by the stereo camera can be used as it is, the viewer can view the photographed image three-dimensionally without any troublesome work. You can Moreover, by rotating either the left or right take-up cylinder (8a), the desired frame can be sent to the opposite position of the mirrors (15), (15), and many stereoscopic images can be viewed continuously and smoothly. can do. The winding cylinder (8a) may be used by being fitted onto the guide pole (17).

Furthermore, since the distance between the left and right eyepieces (20a) (20a) and the front and rear positions of the eyepieces (20a) (20a) can be adjusted, it is possible to deal with the visual acuity of the viewer and the distance between the eyes. . When the eyepieces (20b) (20b) are moved back and forth due to the action of the racks (6) (6) and the pinion (25) (25), the upper plate (3) is fixed to the front frame (19). By engaging with the slits (19c) (19c) and providing a guiding action, the racks (6) (6) and the pinions (25) (25) can be operated smoothly.

In this embodiment, the above-mentioned mounting structure makes it possible to adjust the distance between the eyepieces (20), (20), and the rack (6).
(6) and pinion (25) (25) are provided to allow the front frame (19) to move back and forth, but omitting these, the position between the eyepieces (20) (20) and the front frame (19) and the inner frame (13) may be fixed.

FIGS. 4 and 5 show a second embodiment of the present invention (embodiments of the invention described in claims 1 to 6, 8 and 9).
In this embodiment, the same viewer main body (31) as that of the first embodiment is combined with the lighting device (32).

Detailed description of the viewer main body (31) is omitted, and the same members as those of the first embodiment are designated by the same reference numerals as those used in the first embodiment.

The illuminating device (32) is a lighting box (35) having a front opening, which is pivotally attached to a stand (33) having an upward U-shape when viewed from the front with horizontal shafts (34) (34) facing the left and right directions. Equipped with, in the front opening (35a) of the lighting box (35),
Fit the back plate (2) of the viewer main body (31) to the viewer main body (31)
Is the range from the front-facing position shown by the solid line in FIG. 5 to the almost straight-up position as shown by the imaginary line.
(34) It is supported so that it can freely rotate around.

In the illumination box (35), a light source (36) made of a fluorescent lamp or the like passes through the through hole (2b) of the back plate (2), and a part of the film (in the viewer main body (31) ( It is attached so as to enter the inside of the V-shaped folded portion of A). (37)
Is an electric cord for powering the light source (36).

As in the second embodiment, the viewer body (3
If 1) is performed in combination with the lighting device (32), it is not necessary to pay attention to the lighting from the through hole (2b) of the back plate (2), and the film (A) is always bright with stable brightness. The captured image can be viewed stereoscopically and is extremely convenient to handle.

FIG. 6 shows a third embodiment of the present invention (claim 1).
8 to 10 and 10). In the present embodiment, the same members as those in the first and second embodiments are designated by the same reference numerals and illustrated, and detailed description thereof will be omitted.

In this embodiment, the fixing plate on the back plate (2) side
(9) By the roller (11) pivotally supported by (9) and the pair of left and right rollers (14), (14) pivotally supported by the middle frame (13), the film (A) is formed into a U-shape in plan view. I will guide you to turn back,
Inside the U-shaped folded portion, the plate-shaped portion (41) of the light guide body (41) made of a transparent or translucent acrylic resin is used.
The a) is made to enter through the through hole (2b) of the back plate (2). At the rear end of the plate-shaped portion (41a) of the light guide body (41), a condensing portion (41b) that expands in a trapezoidal shape toward the rear is continuously provided. The light guide body (41) is held in the illumination box (35) so as to be close to the light source (42) arranged in the (35).

On the bottom plate (13b) of the middle frame (13), the film (A)
So that it is parallel to the straight parts on both sides of the folded part of
Two long holes (43) (43) facing the front-back direction are used for the film.
Brackets (46) that support the mirror (45) by bolts (44) and nuts (not shown) that are provided on both sides of the U-shaped guide portion of (A) and through which the long holes (43) are inserted. ), The position of the mirror (45) can be adjusted in the front-rear direction.

Each bracket (46) has a mask (16) as described above.
A mask (47) similar to that is connected to the front so that the mirror (45) and the mask (47) can be moved back and forth as a unit.

In this third embodiment, the film
By guiding (A) in a U-shape instead of a V-shape, the width of the entire device in the left-right direction can be made small and compact, and the film (A) is guided in a U-shape. As a result, the space between them becomes small, and it becomes impossible to place a light source in that space, and the film surface becomes dark.By arranging the light guide (41) in that space, the light from the light source can be narrowed. There is an advantage that it is possible to surely lead to the part of the frame to be viewed through the space and to solve the lack of illumination.

Also, since the mounting position of the mirror (45) and the mask (47) in the front-rear direction can be largely changed, it is possible to view various films photographed by different types of stereo cameras with one viewer. You can

For example, as shown in FIG. 6, the film (A) photographed by the rearist stereo camera has a left image (1-left) of the first photographing in the first frame and a fourth frame in the fourth frame. The right image (1-right) of the first shooting is taken by each eye, and the left image (2-left) and the right image (2) of the second shooting are taken in the third and sixth frames, respectively. -Right) is the 5th and 8th frame
The left image (3-left) and right image (3
-Right) and are taken in sequence.

In order to perform stereoscopic vision using such a film (A), the left and right mirrors (45) and the mask (47) are arranged as shown in FIG.
As indicated by the solid line, the windows (not shown) of both masks (47) are exposed so that the frames separated by exactly 3 pitches, that is, between the two frames appearing in the windows of both masks (47), When two frames are fixed so that another stereoscopic image can be viewed, the film (A) may be advanced by two pitches.

As shown in FIG. 8, with the film (X) photographed by a stereo camera of the Nimslot or Nishika system, the left image (1-left) of the first photographing in the first frame, and the third image
The right image (1-right) of the first shooting is taken in each frame, and the left image (2-left) and the right image (2-left) of the second shooting are taken in the second and fourth frames, respectively. (2-Right) is the left image (3-left) and right image (3-left) of the third shooting in the fifth frame and the seventh frame.
(Right), and the left image (4-left) and right image (4-right) of the fourth shooting are sequentially shot in the sixth frame and the eighth frame.

In order to perform a stereoscopic view using such a film (X), the left and right mirrors (45) and the mask (47) are arranged as shown in FIG.
As shown by the imaginary line (X '), the windows of both masks (47) are exposed so that the frames separated by exactly two pitches are exposed, that is, between the two frames appearing in the windows of both masks (47). When you fix it so that there is one frame and want to see another stereoscopic image,
The film (X) may be frame-fed so that 1 pitch and 3 pitches are alternately repeated.

The film (Y) shown in FIG. 9 has a left image (1-left) of the first image taken in the first frame and a right image (1-left) of the first image taken in the second frame. The right) was taken respectively and the third
Left image (2-
A left image and a right image (2-right) are sequentially captured.

In order to perform a stereoscopic view using such a film (Y), the left and right mirrors (45) and the mask (47) are arranged as shown in FIG.
As shown by the imaginary line (Y ′), when the masks are fixed to the windows of both masks (47) by exactly 1 pitch, that is, the frames adjacent to each other are exposed, and another stereoscopic image is to be seen,
The film (Y) may be advanced by 2 pitches.

[0057]

According to the present invention, the following effects can be obtained. (a) Since the film taken by the stereo camera can be developed and used as it is, the viewer can take a picture without the troublesome work of cutting the film and attaching it to the mount as in the past. You can continuously enjoy the three-dimensional images. (All claims)

(B) According to the second aspect of the invention, desired frames can be sequentially and easily sent to the facing positions of the mirrors.
You can enjoy many captured images continuously and smoothly.

(C) According to the invention described in claims 3 and 4,
It is easy to disassemble, and the front and rear positions of the left and right eyepieces can be adjusted simultaneously with the front frame, and the focus adjustment of the eyepieces is easy.

(D) According to the fifth aspect of the invention, since the distance between the left and right eyepieces can be adjusted, it is possible to deal with the distance between the eyes of the viewer.

(E) According to the invention described in claim 6, since the viewer main body can be used in combination with the illuminating device, it is possible to always obtain a stable light quantity.

(F) According to the invention described in claim 7, the gap between both sides of the folded portion of the film can be made small so that the film can be made compact, and the light guide is provided within the gap. The lack of lighting can be resolved.

(G) According to the invention described in claims 8 and 9,
Accurate stereoscopic vision can be performed by adjusting the positions of the mirrors. Particularly, according to the invention of claim 10, by changing the frame interval of the film reflected by both mirrors, different stereo cameras can be used. There is an advantage that stereoscopic viewing of different types of film that has been taken can be performed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a stereo viewer according to a first embodiment of the present invention.

FIG. 2 is an enlarged rear view of the main part of the same.

FIG. 3 is a schematic perspective view of only a main part of the same.

FIG. 4 is a cross-sectional plan view of the second embodiment of the present invention.

FIG. 5 is a side view of the same.

FIG. 6 is a cross-sectional plan view of the third embodiment of the present invention.

FIG. 7 is a schematic view showing an example of a film used.

FIG. 8 is also a schematic view showing another film.

FIG. 9 is a schematic view showing still another film.

FIG. 10 is a perspective view of a stereo camera and a subject.

FIG. 11 is an enlarged view of a film taken by a stereo camera.

FIG. 12 is a perspective view of a conventional stereo viewer.

[Explanation of symbols]

 (1) Darkroom box (2) Back plate (2a) Fitting hole (2b) Through hole (3) Upper plate (4) Arm part (5) Support plate (6) Rack (7) Pole (8) Winding means (8a) Take-up tube (9) Fixed plate (10) Diffuser plate (11) Roller (guide means) (12) Intermediate part (13) Middle frame (13a) Top plate (13b) Bottom plate (13c) Side plate (13d) Rear plate (13e) Projection piece (14) Roller (15) Mirror (15a) Mounting piece (15b) Slot (15c) Set screw (16) Mask (16a) Window (16b) Light shield (17) Guide pole (18 ) Front (19) Front frame (19a) Front plate (19b) Side plate (19c) Slit (19d) Slot (20) Eyepiece (20a) Eyepiece (20b) Holder (21) Connection link (22) Shaft (23) Rotating link (24) Front-rear adjusting means (24a) Rotating shaft (24b) (24c) Knob (25) Pinion (31) Viewer body (32) Lighting device (33) Stand (34) Axis (35) Lighting Box (35a) Front opening (36) Light source (37) Electric cord (41) Light guide (41a) Plate (41b) Light collector (42) Light source (43) Slot (44) Bolt (45) Mirror (46) Bracket (47) Mask (A) (X) (Y) Film (B) Photosensitive material surface ( ) Right image (D) a left image (C ') right image reflected in the mirror (D') a left image that reflected in the mirror

Claims (10)

[Claims] 1. A stereo viewer for stereoscopically viewing a film image taken by a stereo camera, wherein a pair of left and right eyepieces is arranged on the front surface, and a lighting section is formed on the rear surface. A dark room box, and the film in the dark room box is V-shaped or U-shaped in plan view
A film guiding means for guiding the film to be folded back in a letter shape and a film of a required frame located on both sides of the folding part of the film in the darkroom box are directed to the left and right eyepieces. A stereo viewer characterized by having a pair of left and right mirrors for reflecting light. 2. The film is rotated from one end side to the other end side and from the other end side to one end by rotating a take-up cylinder having both ends of the film fixed to both sides of the darkroom box. The stereo viewer according to claim 1, further comprising a winding means adapted to be fed to the side. 3. A dark room box, a back plate having a daylighting section formed thereon,
A front frame provided with a pair of eyepieces on the front surface, the front frame having a front surface and a rear surface opened, and the back frame covering the back surface, and the front frame fitted on the front frame so as to be slidable in the front-rear direction. The stereo viewer according to claim 1 or 2, further comprising: a front-back adjusting unit that is provided between the front frame and the middle frame and that moves the front frame back and forth with respect to the middle frame. 4. A front-rear movement adjusting means is provided in either the middle frame or the front frame and is oriented in the front-rear direction, and is also in the other so that the rack can be rotated by a knob and meshes with the rack. 3. A pinion provided in the
The described stereo viewer. 5. The stereo viewer according to claim 1, wherein the darkroom box is provided with lens spacing adjusting means for adjusting the spacing between the eyepieces. 6. The stereo viewer according to claim 1, wherein a lighting device is provided in a daylighting section of the darkroom box. 7. The stereo viewer according to claim 6, wherein the illuminating device includes a light guide body that enters the inside of the folded portion of the film. 8. The stereo viewer according to claim 1, further comprising position adjusting means for adjusting the position of each mirror with respect to the darkroom box. 9. The stereo viewer according to claim 8, wherein the position adjusting means is capable of adjusting the position of each mirror in the left-right direction. 10. The stereo viewer according to claim 8, wherein the position adjusting means is capable of adjusting the positions of the respective mirrors in parallel with the straight line portions on both sides of the folded portion of the film.