JP2003248275A - Stereo camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enlarge the picture width of film, to effectively use the film, to reduce the kinds of a necessary film holder and also to facilitate the loading work of the film in a stereo camera. <P>SOLUTION: In the stereo camera 22 by which one pair of right and left stereo pictures 1R and 1L are exposed on the first frame and the third frame of successive film 21, and one pair of next right and left stereo pictures 2R and 2L are exposed on a second frame and a fourth frame, and thereafter similar photographing is repeated, perforation positions are arranged at respectively different positions for each of the pictures 1R, 2R, 1L and 2L of the first frame to the fourth frame and are arranged so as to be symmetrical by taking the centers of the first frame to the fourth frame in a longitudinal direction (cutting plane line Pc3) as the center of symmetry, so that photographing is performed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereo camera, and in particular, the width of a film screen is enlarged to effectively utilize the film, the number of necessary film holders is reduced, and mounting work is facilitated. It is related to the stereo camera.

[0002]

2. Description of the Related Art This type of stereo camera will be described. The longest commercially available 135 size film with a Patrone is designed to take 36 36x24 monaural standard format screens (equivalent to using 8 holes per screen).
The total number of perforations on one screen is 8 x 36 =
There are 288 holes, and the 135 size film is provided with some margin at the front end and the rear end of the film.

On the other hand, using the 135 size film, a pair of left and right stereo screens are photographed on the first and third frames, and a pair of next left and right stereo screens are photographed on the second and fourth frames. After that, as a stereo camera that repeats the same shooting, a camera that uses 7 holes for perforation in one screen is known.

In the stereo camera, 288 / (7 × 2) = 20.57 sets of stereo photographs of 7 holes corresponding to one screen can be taken within the length of 288 holes of the 135 size film. However, when 20 sets of stereo photographs are taken, the total number of holes is 14 × 20 = 280, and there is a margin of 8 holes in total.

Therefore, in Company R, the width of the photographing window portion of the camera is enlarged to 33.5 mm, which is slightly larger than 4.735 × 7 = 33.145 mm which is equivalent to 7 holes, and the center of the photographing windows on the left and right sides is enlarged. The distance is set to 33.5 × 2 = 67 mm. The film feed amount is 33.5 mm (33.5 / 4.73 mm) for one screen after shooting the odd numbered screens.
5 = 7.075 holes), and after shooting the screen of the even numbered group, 21.925 holes, which is slightly larger than 7.075 × 3 = 21.225 holes for 3 screens, are sent. Therefore, the number of holes in one group including the four screens is 29.

Furthermore, the total number of holes used when shooting 20 sets of screens is 29 × 10 = 290 holes, which is 36 × 2 described above.
Use two holes more than the total number of holes used, which is 8 × 36 = 288, when 36 images of 4 monaural standard format are taken.

Therefore, the stereo camera manufactured by Company R is excellent in that the photographing screen width is enlarged and the commercially available 135 size film is effectively used, but a new problem occurs. That is, since the screen width corresponding to one screen (the film length when cut for each screen) is 33.5 mm, the hole position, which is the perforation of the film with respect to the shooting screen, is different for each screen. The hole positions are all different on the four screens, that is, the film cut for each screen has four different hole positions.

In the stereo slide mount (US, Pat, No. 4,942,684) manufactured by R company, the left and right films can be arbitrarily adjusted in position, even if the hole positions are different for each photographing screen. It is adjustable, but moreover it is difficult to make an accurate adjustment.

FIG. 14 shows a stereo slide mount 11 described in Japanese Patent Application No. 11-273315. The stereo slide mount 11 enables accurate position adjustment when mounting a stereo picture taken by the stereo camera manufactured by R. Is.

However, in order to use the stereo slide mount 11, in order to make the photographing screen of the film and the windows 13L and 13R of the film holders 12L and 12R coincide with each other, the film is predetermined in the film holders 12L and 12R, respectively. Must be locked in position. still,
In the figure, 14 is a base frame that serves as a substrate of the stereo slide mount 11, and 15 is fixed to the base frame 14 and the film holders 12L, 12
It is a cover frame in which R is slidably fitted.

As described above, since the film photographed by using the camera of R company has four kinds of films having different hole positions for each screen, the stereo slide mount 1 is used.
1 is used, a film holder corresponding to four kinds of films, that is, a pin 1 for locking the film
It is necessary to prepare four types of film holders having different positions of 6, 16 ,. However, even if a film holder of 4 types is prepared and the marking for identification is further used,
In practice, confusion in use is expected.

Therefore, in a stereo camera, in order to expand the screen width of the film, effectively use the film, reduce the number of necessary film holders, and facilitate the mounting work of the film. Therefore, a technical problem to be solved occurs, and an object of the present invention is to solve the above problem.

[0013]

The present invention has been proposed in order to achieve the above-mentioned object, and a pair of left and right stereo screens are photographed on the first frame and the third frame of a continuous film, and the second frame is photographed. In the stereo camera, the following pair of left and right stereo screens are photographed on the 4th frame and the same photographing is repeated thereafter, and the perforation positions are arranged at different positions for each of the 1st to 4th frames. Along with
A stereo camera configured to be arranged symmetrically with respect to the longitudinal center of the first frame to the fourth frame as a center of symmetry, and a left and right side of the first and third frames of the continuous film. Take a pair of stereo screens and
In a stereo camera, the following pair of left and right stereo screens are photographed on each frame and the fourth frame, and thereafter, the same photographing is repeated. Then, the perforation position is set to a different position for each of the first frame to the fourth frame. The first frame to the fourth frame are arranged symmetrically with respect to the longitudinal center of the first frame to the fourth frame, and the images are photographed by the mark recording device. A stereo camera configured to record a mark for cutting the film at a boundary position, and a pair of left and right stereo screens are photographed on the first frame and the third frame of the continuous film, and the second frame and the fourth frame are photographed. In the stereo camera that captures the next pair of left and right stereo screens, and then repeats the same capture, the perforation position is set for each screen from the first frame to the fourth frame. Together placed in different positions,
The first to fourth frames are arranged symmetrically with respect to the longitudinal center of the first frame to the fourth frame, and are photographed in a symmetrical manner, and a frame number for stereo slide is displayed on each screen of the film by a number recording device. And a stereo camera configured to record a pair of left and right stereo screens on the first and third frames of the continuous film, and the next pair of left and right stereo screens on the second and fourth frames. Then, thereafter, in a stereo camera that repeats the same shooting, the perforation positions are arranged at different positions for each screen of the first frame to the fourth frame,
The first frame to the fourth frame are arranged so as to be symmetrical with respect to the longitudinal center of the frame so as to be photographed, and a mark recording device is used to display the images at the boundary positions between the screens of the film. A stereo camera configured to record a mark for cutting a film, and further configured to record a stereo slide frame number on each screen of the film by a number recording device.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail below with reference to FIGS. In FIG. 1, 21 is a continuous film, and the first frame screen 1R and the third frame screen 1L of the film 21 are simultaneously photographed as a pair of left and right screens, and then a second frame screen 2R. The screen 2L of the fourth frame is simultaneously photographed as a pair of left and right screens, that is,
Stereo photographs are taken in the order of screen arrangement of screens 1R-2R-1L-2L. Then, the four screens are photographed (but not necessarily gapless) in a state where adjacent screens are in contact with each other (gapless), and thereafter, photographing is repeated in the same screen arrangement.

Further, when the film photographed with the above-mentioned screen arrangement is cut for each screen as in the invention described in Japanese Patent No. 2957086, the perforation hole shape at each end of each film after cutting is made open. Along with
The invention is improved to effectively use the film, and the cutting position of the film that maximizes each screen width is the position indicated by the five cutting lines Pcl, Pc2, Pc3, Pc4, and Pc5 shown in the drawing.

That is, the cutting line Pc3 located at the center is set at the center of the hole as a perforation, the cutting lines Pcl and Pc5 at both outer ends are set at the outermost ends of the hole, and the cutting lines Pc2 on both sides are set. And Pc4 are set in the middle of the center of the hole and the outer end, that is, at a position outside the center of the hole by the hole width × 1/4.

FIG. 2 shows the film 21 and the film 21.
A photographing window 23L of the stereo camera 22 for photographing the
23R, showing the corresponding positional relationship with the stereo camera 22R.
The window width dimension Ww of the left and right windows 23L or 23R is a dimension obtained by adding 1/4 of the hole opening width to the width corresponding to 7 holes of the film 21. Hole pitch of 135 size film is 4.735m
Since the opening width of the hole is 2 mm, the window width dimension Ww =
4.735 × 7 + 2 × 0.25 = 33.645 mm, which corresponds to 33.645 / 4.735 = 7.1056 holes. This is the same number of holes as one screen. And
The distance between the centers of the left and right screens (the left and right shooting windows 23L and 23R of the camera) is 33.645 × 2 = 67.29 mm, and the space width Ws between the left and right windows 23L and 23R is Ws.
= 67.29−33.645 = 33.645 mm. Also, the equivalent number of holes on the four screens is 7.1056 × 4 = 28.
4224, but by adjusting the feed, the number of equivalent holes in one group is set to 29 holes. Therefore, the cutting line at the start of the fifth frame is Pc6.

As shown in the upper diagram of FIG. 3, all projected images on the screens 1L, 1R, 2L and 2R of the film 21 are inverted images, and in order to enable stereoscopic viewing, as shown in the lower diagram of FIG. The film 21 is cut for each screen, rotated by 180 °, and rearranged in an erect image state.

The left and right film holders 24L and 24R shown in FIG.
Although L and 1R are mounted, since the hole positions which are perforations are different between the screens 1L and 1R, the pins 25, 25 for locking the film 21 projecting from the left and right film holders 24L, 24R are ... , 26, 2
6 ... The positions are different between the left film holder 24L and the right film holder 24R (in FIG. 4, the pins 26, 26 ... Position is biased to the right of the pins 25, 25 ... Position).

However, the film 21 shown in the upper diagram of FIG. 3 has the cutting lines Pc2 and Pc4 and the cutting line Pcl.
And Pc5 position are hole symmetrical positions, and the cut holes 0, PL1 to PL3 and 0, P on each screen of FIG.
R1 to PR3 are symmetrical with respect to the cutting line Pc3 as a center.

FIG. 5 shows the odd-numbered frame number screens 1L and 1R shown in the lower diagram and the even-numbered frame number screens 2L and 2R shown in the upper diagram, which are arranged opposite to each other for the reason described above. 1L, 1R and screens 2L, 2 in the above figure
R cut holes (0, PL1, PR3, PR2),
The (0, PR1, PL3, PL2) shapes are equal. In the figure, if the odd group in the lower figure is a normal screen layout, the even group in the upper figure is an inverted image and the left and right screen positions are opposite to each other. 18
When rotated by 0 °, the image becomes an erect image and the left and right screens are arranged normally. Therefore, the odd-numbered and even-numbered screens 1
The L, 1R and 2L, 2R films 21, 21 ... Can use the same film holder 24L, 24R in common.

However, as described above, the films 21 and 21 of the odd-numbered and even-numbered screens 1L, 1R and 2L, 2R are used.
Even if it is possible to use the same film holders 24L and 24R for each of the film holders, if the film holders 24L and 24R are actually used, then the respective film 21, 21 ...
It is difficult to identify which side of 4L and 24R is attached to which side, in which direction, etc.

FIG. 6 shows a stereo frame number recording device 28, 28 and a cutting mark recording device 29.
29 shows a stereo camera 30 of the present application, which is equipped with 29 ...
FIG. 7 shows a film 31 taken by the stereo camera 30.

On each screen of the film 31, the cutting marks 32, 32 are cut by the cutting mark recording devices 29, 29 ... At positions corresponding to the cutting lines Pcl, Pc2, Pc3, Pc4, Pc5, Pc6 shown in FIG. Is recorded by exposure and the frame number recording device 2
8, 28, the frame numbers 33, 33, ... For stereo slides such as 1R, 2R, 1L, 2L are exposed and recorded. The cutting mark recording device 2 shown in FIG.
9, 29 ... Cutting mark recording device 2 above and below the right end
9 and 29 may be exposed and recorded only when the odd frame number screen is arranged.

By exposing and recording the marks 32, 32, ..., The cutting lines Pcl, Pc2, Pc3, P
Corresponding to c4, Pc5, and Pc6, the hole positions (cutting positions for the holes) arranged for each screen of the film 31 are arranged at slightly different positions. Then, even in that case, the cutting position can be accurately visually recognized by the marks 32, 32, ... Therefore, erroneous cutting can be eliminated, and safe and accurate cutting can be performed. Further, the film 31 can easily identify the screen by the frame numbers 33, 33 ...

However, the left and right film holders 24L and 24R shown in FIG.
The positions of 5, 25, ..., 26, 26 ... are 180-degree rotational symmetry between the odd group and the even group and can be used by reversing as described above, but for the odd group corresponding to the film 31 to be locked. And identification for even numbers is required. For example, FIG. 8 shows pins 34, 34 ..., 3 for mounting an odd number of sets of films 31.
A pair of left and right film holders 36 including 5, 35, ...
L and 36R, the film holder 24L and 24R of FIG.
Although it has the same shape as that of “odd n (odd n
The identification symbol OL indicating "left of the number) and the identification symbol OR indicating" right for odd number group "are marked.

The odd numbered films 1L, 3L, 5L on the left side may be attached to the identification symbol OL side, and the odd numbered right screens 1R, 3 may be attached on the identification symbol OR side.
R and 5R films may be attached. In the figure, 37L and 37R are the film holders 36L and 36R.
Windows.

The film holders 38L, 3 shown in FIG.
8R is a product obtained by rotating the odd-numbered film holders 36L and 36R by 180 ° so that the vertical directions are opposite to each other. The left and right positions of the film holders 36L and 36R are opposite to each other, and the vertical directions are also opposite. (Therefore, the odd group identification symbols OL and OR are in an inverted state).

As described above, the film holder 36
By rotating L and 36R by 180 °, the positions of the film locking pins 34, 34 ... And 35, 35 ... Are also shown in FIG.
The positions are opposite to each other, such as 0, 40 .... Then, the identification symbols EL and ER for displaying "left and right of the even number" are marked in the opposite direction to the identification symbols OL and OR for the odd number, and the identification symbols EL and An even number of sets of left and right films may be attached to the ER. In the figure, 41L and 41R are windows of the film holders 38L and 38R.

That is, a pair of left and right film holders 38L and 38R in which the positions of the film locking pins 39, 39 ..., 40, 40 ... Are different from the positions of the windows 41L and 41R are prepared, and odd and even film holders 38L and 38R are prepared. Left and right identification code OL,
Only by adding OR, EL, and ER, it is possible to deal with four types of films having different left and right hole positions of the odd number group and the even number group, respectively, and it is possible to share them. This reduces the number of film holders required,
Further, problems such as confusion regarding the combination and arrangement with the film holder are solved, and the mounting work of the film becomes very easy.

The film 42 shown in FIGS.
43 is the film (21 in FIG. 1 and 3 in FIG. 7)
It is another embodiment different from the screen layout of 1), and the width of each one screen is obtained by dividing a film corresponding to 29 holes into four equal parts.
The screen width is expanded to the maximum limit.
Make up a group.

As described above, the film holders for odd number groups and the film holders for even number groups can be used in common, so that the positions of the holes are symmetrical between the left and right screens (films). The film 42 locates the center cutting line Pc13 of the four screens of the first group at the center of the hole, and the film 43 positions the center cutting line Pc of the four screens of the first group.
The c23 is located between the holes.

The film cutting length corresponding to one screen of the films 42 and 43 is 4.735 × 29/4 = 34.
It becomes 32875 mm. In either case of the films 42 and 43, it is impossible to arrange open holes at both ends of the cut film, but since the 135 size film has many holes at equal intervals, The pins may be erected at the corresponding positions of the film holder so as to be locked by using the holes other than the both ends.

Further, the films 21, 31, 42, 4 are
The conventional mechanism can be applied to the film feeding mechanism of the stereo camera for photographing the three screen arrangements. FIG. 12 is a conceptual diagram in which a conventional film feeding mechanism is applied (detailed description of the rotation stopper portion is omitted). In each film, the perforation of the film is meshed with the illustrated film feeding sprocket wheel 44. Sent by.

A pinion 45 is connected to the shaft of the sprocket wheel 44 and meshes with a gear 46. The rotation stopper 4 is provided on the shaft of the gear 46.
7 is attached, and the rotation stopper 47 is 2 on the circumference.
By having the grooves 48 and 49 at some positions and regulating the grooves 48 and 49 with the stop lever 50, the film is positioned at a predetermined stop position. Then, when the rotation stopper 47 makes one rotation, the film is fed by 29 holes, which is a 4-group 1 screen.

The number of teeth of the sprocket wheel 44, ..., the number of teeth of the Ns pinion 45, ..., The number of teeth of the n gear 46, ... ..... If N, the relationship between the number of teeth of the sprocket wheel 44, the number of teeth of the pinion 45, and the number of teeth of the gear 46 is n / N = Ns / 29.

As shown in FIG. 13, when the rotation stopper 47 makes one rotation, 29 holes of the film are fed, so that the ratio of the rotation angle a and the rotation angle b formed by the stopper grooves 48 and 49 is an odd number. The film feed amount after shooting the screen,
It is set in a geometrical relation with the film feed amount after the even number of screens are shot.

In addition to the above-mentioned gear type, as a film feeding device currently in practical use, the film is wound by a drum driven by an electric motor, and perforations of the film are counted (measured) by an infrared sensor and stopped and positioned. There is a method of doing this, and this method can also be used. In this case, the alternating feed of 1 screen and 3 screen is a program of alternate feed perforation counter,
Also, the hole position and 3 when the film is stopped when one screen is sent.
Since the hole positions are different when the film is stopped when the screen is sent, the sensors are installed in two places. However, if you use an image sensor such as an infrared linear sensor, you can freely set the stop position for each film feed, and you can change and fine-tune it, and further, the feed speed immediately before the film stops. The control etc. (slow down the feed speed immediately before stop) can be set freely.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified one.

[0040]

As described in detail in the above-mentioned one embodiment, the invention according to claim 1 is such that the perforation position is different for each screen of the first to fourth frames in the stereo camera. Since it is arranged at a position and is arranged so as to be bilaterally symmetrical with respect to the longitudinal center of the first frame to the fourth frame as a center of symmetry, it is configured to photograph.
The same number of film holders can be used for the film of the odd number group and the film of the even number group, and the number of kinds of the required film holder can be reduced. Further, the above-mentioned arrangement makes it possible to increase the screen width of the film and effectively utilize the film.

In the stereo camera according to the second aspect of the present invention, the perforation positions are arranged at different positions for each screen of the first frame to the fourth frame, and the first frame to the fourth frame are arranged. It is arranged so as to be symmetrically arranged with the center in the longitudinal direction as the center of symmetry, and a mark recording device records a mark for cutting the film at the boundary position between the respective screens of the film. In addition to the effect according to claim 1, the film can be easily, safely and accurately cut.

Further, in the invention described in claim 3, in the stereo camera, the perforation positions are arranged at different positions for each of the first frame to the fourth frame, and the first frame to the fourth frame are arranged. It is arranged so that it is symmetrically arranged with the center in the longitudinal direction as the center of symmetry for shooting
Moreover, since the number recording device is configured to record the frame number for stereo slide on each screen of the film, in addition to the effect described in claim 3, the frame of the film can be easily confirmed and the mounting work is facilitated. .

Further, in the invention described in claim 4, in the invention described in claim 4, in the stereo camera, the perforation positions are arranged at different positions for each screen of the first frame to the fourth frame. The first to fourth frames are arranged so as to be bilaterally symmetrical with respect to the center of the longitudinal direction as the center of symmetry, and the mark recording device is used.
Since a mark for cutting the film is recorded at the boundary position between the respective screens of the film, and further, a number recording device is configured to record the stereo slide frame number on each screen of the film. It is an invention that exhibits a truly significant effect, such as that the effects of the inventions of claims 2 and 3 can be achieved together.

[Brief description of drawings]

FIG. 1 is a front view of a film taken by a stereo camera according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing an embodiment of the present invention and showing a corresponding positional relationship between a stereo camera and a film photographed by the stereo camera.

FIG. 3 is a front view of a film taken by a stereo camera and a film obtained by cutting and rearranging the film according to an embodiment of the present invention.

FIG. 4 is a front view of the left and right film holders showing the embodiment of the present invention.

FIG. 5 is a front view of an even-numbered film in which a cut odd-numbered film and the odd-numbered film are arranged so as to face each other in opposite directions, showing an embodiment of the present invention.

FIG. 6 is a conceptual diagram of a stereo camera including a frame number recording device and a cutting mark recording device.

FIG. 7 is a front view of a film on which a frame number and cutting marks are recorded according to the embodiment of the present invention.

FIG. 8 is a front view of the left and right film holders for odd-numbered groups according to the embodiment of the present invention.

FIG. 9 is a front view of a left and right film holder that can be shared as an even number left and right film holder and an odd number left and right film holder according to an embodiment of the present invention.

FIG. 10 shows another embodiment of the present invention, and is a front view of a film which is taken by dividing a film corresponding to 29 holes in four screens forming one group into four equal parts.

FIG. 11 shows still another embodiment of the present invention, and is a front view of a film which is taken by dividing a film corresponding to 29 holes in a group of 4 screens into 4 equal parts.

FIG. 12 is a conceptual diagram of a film feeding mechanism of a stereo camera.

FIG. 13 is an explanatory diagram of a rotation stopper.

FIG. 14A is a bottom view of a front frame showing a conventional example. (B) The longitudinal cross-sectional view of (a) figure. (C) A front view of the left and right film holders showing a conventional example. (D) The vertical cross-sectional view of (c) figure. (E) A front view of a stereo slide mount showing a conventional example in which a left film holder is mounted on a base frame. (F) The vertical cross-sectional view of the base frame of (e) figure.

[Explanation of symbols]

1L, 1R, 2L, 2R screen 14 front frame 21, 31, 42, 43 film 22, 30 stereo camera 24L, 24R, 36L, 36R film holder 25, 26, 34, 35, 39, 40 pin 28 number recording device 29 Mark recording device 32 Mark 33 Frame number 38L, 38R Film holder OL, OR, EL, ER Identification mark

Claims (4)

[Claims] 1. A pair of left and right stereo screens are photographed on the first and third frames of a continuous film, and a pair of left and right stereo screens are photographed on the second and fourth frames. In a stereo camera that repeats the above, the perforation positions are arranged at different positions for each screen of the first frame to the fourth frame, and the left and right sides are symmetrical about the longitudinal center of the first frame to the fourth frame. A stereo camera characterized in that it is arranged so as to be photographed. 2. A pair of left and right stereo screens are photographed on the first frame and the third frame of a continuous film, and a pair of left and right stereo screens are photographed on the second frame and the fourth frame. In a stereo camera that repeats the above, the perforation positions are arranged at different positions for each screen of the first frame to the fourth frame, and the left and right sides are symmetrical about the longitudinal center of the first frame to the fourth frame. And a mark recording device for recording a mark for cutting the film at the boundary position between the respective screens of the film. Stereo camera. 3. A pair of left and right stereo screens are photographed on the first and third frames of a continuous film, and a pair of left and right stereo screens are photographed on the second and fourth frames. In a stereo camera that repeats the above, the perforation positions are arranged at different positions for each screen of the first frame to the fourth frame, and the left and right sides are symmetrical about the longitudinal center of the first frame to the fourth frame. A stereo camera, which is configured so as to be arranged so as to shoot, and is configured to record a stereo slide frame number on each screen of the film by a number recording device. 4. A pair of left and right stereo screens are photographed on the first frame and the third frame of a continuous film, and the next pair of left and right stereo screens are photographed on the second frame and the fourth frame. In a stereo camera that repeats the above, the perforation positions are arranged at different positions for each screen of the first frame to the fourth frame, and the left and right sides are symmetrical about the longitudinal center of the first frame to the fourth frame. And a mark recording device for recording a mark for cutting the film at the boundary position between the respective screens of the film, and number recording. A stereo camera characterized in that a device records a stereo slide frame number on each screen of the film.