Stereo camera and stereo slide mount

Photography – Plural image recording – Stereoscopic

Reexamination Certificate

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Details

C352S239000

Reexamination Certificate

active

06751412

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a stereo camera and a stereo slide mount. More specifically, the present invention relates to a stereo camera and a stereo slide mount, in which an extending of frame width of a film is contemplated to efficiently use the film and to decrease a required number of types of film holders, and mounting operation is made easy.
2. Description of the Related Art
This type of stereo camera and stereo slide mount will be described. Commercially available 135-size films packed in cartridges are designed for photographing 36 frames in a 36×24 monaural standard format (using 8 perforations for one frame), in the case of having the longest length, and the total number of perforations of the photographed 36 frames becomes 8×36=288 perforations. In addition, a slight tolerance is provided at the front end and at the rear end in the 135-size film.
On the other hand, as a stereo camera for photographing a pair of left and right stereo pictures in the first frame and the third frame, photographing the next pair of left and right stereo pictures in the second frame and the fourth frame, and repeating similar photographing, there is known one such stereo camera which uses 7 perforations for one frame.
In this stereo camera, it is possible to photograph 288/(7×2)=20.57 sets, that is, 20 sets of stereographs having 7 perforations for one frame in the length corresponding to 288 perforations of the 135-size film. The total number of perforations at the time of photographing 20 sets of stereographs is 14×20=280 perforations, and hence having a tolerance of further 8 perforations.
Therefore, others have enlarged the width of the photographing window of a camera to 33.5 mm, which is slightly larger than 4.735×7=33.145 mm corresponding to 7 perforations, and sets the pitch between the left and right photographing windows to 33.5×2=67 mm. As the feed quantity of the film, after taking pictures for frames of an odd number set, 33.5 mm (33.5/4.735=7.075 perforations) for one frame is fed, and after taking pictures for frames of an even number set, about 21.925 perforations slightly more than 7.075×3=21.225 perforations corresponding to three frames are fed. Therefore, the number of perforations of one group including feeding for four frames becomes 29 perforations.
Moreover, the total number of used perforations at the time of taking pictures for 20 sets frames becomes 29×10=290 perforations, which is two perforations more than the total number of used perforations 8×36=288 at the time of taking 36 pictures for frames in the above-described 36×24 monaural standard format.
Therefore this stereo camera is excellent in that the commercially available 135-size film is effectively used, by extending the frame width to be photographed, but a new problem arises. That is to say, since the frame width corresponding to one frame, the film length at the time of cutting for each one frame, is made to be 33.5 mm, a hole position, which is a perforation of the film with respect to the picture frame, becomes different for each frame, therefore the hole positions are all different for each four frames. That is, films cut for each frame become four types of films having respectively different hole position.
With the stereo slide mount disclosed in U.S. Pat. No. 4,942,664, left and right individual film is optionally positionable, and the position is also adjustable even if the hole position is different for each picture frame. However, it is difficult to adjust accurately.
FIG. 14
shows a stereo slide mount
11
described in Japanese Patent Application No. Hei 11-273315, wherein accurate position adjustment is possible at the time of mounting a stereograph photographed by the stereo camera by the stereo slide mount
11
.
However, in order to use the stereo slide mount
11
, it is necessary to latch the film in predetermined positions of the respective film holders
12
L and
12
R, so that the picture frames of the film coincides with the windows
13
L and
13
R of the film holders
12
L and
12
R. In this figure, reference symbol
14
denotes a base frame serving as a base plate of the stereo slide mount
11
, and
15
denotes a cover frame adhered to the base frame
14
for slidably fitting the film holders
12
L and
12
R together.
As described above, films photographed by using this camera become films of four types having different hole positions for each frame. Hence, in order to use the stereo slide mount
11
, film holder corresponding to the four types of films, that is, four types of film holders having different positions of pins
16
and
17
for latching those films must be prepared. However, even if four types of film holders are prepared, and used by adding marking for identification, confusion is expected in actual use.
Therefore, it is an object of the present invention to solve the above-described technical problems in the stereo camera and the stereo slide mount, in order to extend the frame width of the film to efficiently use the film and to decrease a required number of types of film holders, and to make mounting operation easy.
SUMMARY OF THE INVENTION
The present invention has been proposed in order to achieve the above object, and provides:
a stereo camera for photographing a pair of left and right stereo pictures in the first frame and the third frame of a continuous film, photographing the next pair of left and right stereo pictures in the second frame and the fourth frame thereof, and repeating similar photographing, wherein the perforation positions of the first frame to the fourth frame are arranged so as to be symmetrical about the center in the longitudinal direction of the first frame to the fourth frame as the center of symmetry for performing photographing;
a stereo camera for photographing a pair of left and right stereo pictures in the first frame and the third frame of a continuous film, photographing the next pair of left and right stereo pictures in the second frame and the fourth frame thereof, and repeating similar photographing, wherein the perforation positions of the first frame to the fourth frame are arranged so as to be symmetrical about the center in the longitudinal direction of the first frame to the fourth frame as the center of symmetry for performing photographing, as well as a mark being recorded for cutting the film at a boundary position between respective frames of the film by a mark recording device;
a stereo camera for photographing a pair of left and right stereo pictures in the first frame and the third frame of a continuous film, photographing the next pair of left and right stereo pictures in the second frame and the fourth frame thereof, and repeating similar photographing, wherein the perforation positions of the first frame to the fourth frame are arranged so as to be symmetrical about the center in the longitudinal direction of the first frame to the fourth frame as the center of symmetry for performing photographing, as well as a frame number for stereo slides being recorded in each frame of the film by a number recording device;
a stereo camera for photographing a pair of left and right stereo pictures in the first frame and the third frame of a continuous film, photographing the next pair of left and right stereo pictures in the second frame and the fourth frame thereof, and repeating similar photographing, wherein the perforation positions of the first frame to the fourth frame are arranged so as to be symmetrical about the center in the longitudinal direction of the first frame to the fourth frame as the center of symmetry for performing photographing, as well as a mark being recorded for cutting the film at a boundary position between respective frames of the film by a mark recording device, and a frame number for stereo slides being recorded in each frame of the film by a number recording device;
a stereo slide mount in which a pair of left a

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