JPH04313740A - Microfilm camera - Google Patents

Abstract

PURPOSE:To evade troublesome work that a frame where an error in photographing is made is cut off after photographing on all the frames of a microfilm is finished without executing photographing on all the frames again the case that the error in photographing is made in a microfilm camera. CONSTITUTION:An original placed under a photographing lens 105 is photographed on one frame of the microfilm 101 by the lens 105 and a shutter 110. After photographing on the frame is finished, the microfilm 101 is fed by one frame. In the case that the error in photographing is made, the frame where the error in photographing is made is rewound by one frame by depressing a photographing error key. A mirror 109 is moved to the front of the objective lens 105A of the lens 105, and a lamp 107 for re-exposure is allowed to emit light. When the shutter 110 is opened, the frame where the error in photographing is made is exposed again with the light from the lamp 107.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microfilm camera, and more particularly to a microfilm camera having a re-exposure device.

0002

2. Description of the Related Art Conventional microfilm cameras expose the microfilm by irradiating light onto an object such as an original, and focusing the reflected light from the original onto the microfilm using a lens. With this microfilm camera, after one frame is taken, the strip of microfilm is wound up one frame, the original is changed, the shirt is opened and closed, and that frame is exposed to light, which is repeated to create a single microfilm. They took turns photographing the manuscript.

0003

[Problems to be Solved by the Invention] However, in such a microfilm camera, photographing errors may occur, such as photographing the wrong document by mistake. In this case, traditional microfilm cameras
The erroneously photographed frames on the microfilm were rewound as they were with other legitimately photographed frames.

However, since the frame in which the photographing error occurred has been exposed to light in the same way as the other frames on the same film, it is difficult to identify them after development, and it is inconvenient to search for them as is. Therefore, it was necessary to replace the microfilm and re-photograph all the frames of the microfilm in succession. Another problem is that after all the frames of this microfilm have been photographed, frequent editing work is required, such as cutting out frames in which photographing errors have occurred.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention eliminates the need to re-photograph all the frames of the microfilm by re-exposing only the frames of the microfilm where a photographing error occurred in a microfilm camera. The object of the present invention is to provide a microfilm camera that can avoid frequent operations such as cutting out frames in which a photographing error has occurred after all frames have been photographed.

[0006]

[Means for Solving the Problems] A microfilm camera according to the present invention is a microfilm camera that exposes a strip of microfilm frame by frame, and a re-exposure means that further exposes the already exposed frames of the microfilm. It is characterized by having the following.

[0007]

According to the present invention, a microfilm camera photographs a strip of microfilm by exposing it frame by frame. If a photographing error occurs, in this microfilm camera, the frame of the microfilm where the photographing error occurred (which has already been exposed once) can be exposed again by the re-exposure means. As a result, frames that were photographed incorrectly can be easily identified from frames that were properly photographed, and the search is not inconvenient.

[0008]

[Example] First example of the microfilm camera according to the present invention
Examples will be described below with reference to FIGS. 1 to 3 and FIGS. 5 and 6.

FIG. 1 shows a schematic configuration of the main parts of a microfilm camera according to the first embodiment.

In FIG. 1, film reel 114, 1
13 are rotatably arranged at a predetermined distance apart, and these film reels 114 and 113 are driven by motors 204A and 204B, respectively. . These film reels 114, 113
A strip-shaped microfilm 101 is wrapped around the area. That is, both longitudinal ends of the microfilm 101 are wound around these film reels 114 and 113, respectively. The microfilm 101 is, for example, a transparent resin coated with a photosensitive emulsion on one surface, and a plurality of frames are continuously formed along the longitudinal direction of the microfilm 101. And these film reels 11
4 and 113, there are film feed rollers 1 and 113, respectively.
12 and a film take-up roller 111 are rotatably disposed. Therefore, the strip-shaped microfilm 101 stretched around these film reels 114 and 113 is configured to be able to slide in contact with these rollers 112 and 111 and run between the rollers 112 and 111 in a horizontal plane.

An aperture 103 is provided on the film running path at an intermediate position between the film feed roller 112 and the film take-up roller 111.
It is fixed and placed parallel to 1. This aperture 10
3 is a rectangular plate material, and rectangular windows (for example, for originals, for blip marks, and for frame counters) are provided at three locations.

Above the aperture 103, there is a pressure plate 10 that is movable in the vertical direction (vertical direction) with respect to the upper surface of the aperture 103.
2 is provided. The pressure plate 102 is formed of a rectangular plate. Then, this pressure plate 102 and the aperture 103
The microfilm 101 is arranged so that it can run in the space formed between the two vertically facing each other. Therefore, these pair of pressure plates 102 and aperture 1
03 means that it has a function of sandwiching the microfilm 101 and fixing it at the photographing position.

The photographing lens 105 is disposed and fixed oppositely below the aperture 103 so that its focal point is located at the frame of the microfilm 101 within the document photographing window of the aperture 103. Further, a document table (not shown) is provided below the photographic lens 105 and a predetermined distance away from the photographic lens 105, and a document or the like as a subject is placed on the document table. Therefore, the photographing lens 105 functions to focus the light reflected from the original, which is the subject, onto the microfilm 101.

A shutter 110 is provided between the photographing lens 105 and the microfilm 101. The shutter 110 is driven to open and close by a drive means (not shown), and is open for a certain period of time to form an optical path between the photographing lens 105 and the microfilm 101. By forming this optical path, the frame located in the window of the aperture 103 of the microfilm 101 is exposed to light. Therefore, a subject such as a document is photographed. shutter 11
When 0 is closed, the optical path is blocked.

[0015] Here, this microfilm camera has the following features:
The photographing lens 105 and the shutter 1 are capable of photographing the original document one frame at a time on a microfilm 101.
In addition to the 10 photographing units, there is a re-exposure means 120 that can expose the frames of the microfilm 103 that have already been photographed (exposed) again. This re-exposure means 12
0 includes a re-exposure lamp 107, a mirror 109, a mirror driving member (for example, illustrated as a motor 204C), and the like.

The re-exposure lamp 107 is fixed and disposed close to the side of the optical axis (optical path) connecting the photographing lens 105 and the aperture 103 (original photographing window).

The mirror 109 is movably provided by the mirror driving member (consisting of a motor 204C, etc.), and when photographing a document or the like with the photographing unit, the objective lens 10 of the photographing lens 105 is moved.
It is provided at a position that does not obstruct the optical path between 5A and the original or the like (on the side of the optical path, opposite to the re-exposure lamp 107). When re-exposing a frame in which a photographing error has occurred on the microfilm 101, the mirror 109 is moved to a position (on the optical path) that blocks the optical path between the objective lens 105A of the photographing lens 105 and the original, etc., using this mirror drive member. ). At this time, the angle between the reflective surface of the mirror 109 and the optical path is 45 degrees, and the light emitted from the re-exposure lamp 107 is reflected by the mirror 109 and then passes through the photographing lens 105 and the shutter 110. (open), aperture 1
It passes through the document photographing window 03 and reaches the film surface. Therefore, the entire surface of the frame in which the photographing error occurred on the microfilm 101 is uniformly re-exposed.

As shown in FIGS. 5 and 6, in this embodiment, each frame of the microfilm 101 has a rectangular photographing surface 101A occupying the center of the frame, and this photographing surface A frame counter 101C is exposed and recorded in the upper margin of 101A, and a blip mark 101B is recorded in the lower margin. As described above, on this photographing surface 101A, the document is photographed (exposed) by the photographing unit through the document photographing window of the aperture 103, and is exposed again by the re-exposure means 120. Of the three windows of this aperture 103, the light emitted from the blip mark imaging LED 106 passes through this window, as shown in FIGS. 5 and 6. , the lower margin of the microfilm 101 is exposed to light to form a rectangular blip mark 101B. This blip mark 101B is attached to each frame of the microfilm 101 and is used for the purpose of searching these frames.

The blip mark imprinting lens 104 guides the light from the blip mark imprinting LED 106 to the blip mark photographing window of the aperture 103 and converges it on the lower margin of the microfilm 101. It is arranged. In addition, in front of the objective lens 104A of this blip mark imprinting lens 104 (lower in FIG. 1), there is a blip mark imprinting LE.
A mirror 108 is fixedly provided to reflect the irradiated light from the D 106 onto the blip mark imprinting lens 104. The angle between the reflective surface of the mirror 108 and the optical axis of the blip mark imprinting lens 104 is 45°. Therefore, the LED for blip mark imprinting
The light emitted by the mirror 106 is reflected by the mirror 108, and then passes through the blip mark imaging lens 104 and the blip mark imaging window of the aperture 103.
The lower margin of the microfilm 101 is reached.

Note that while the microfilm 101 is running between the film reels 113 and 114, the blip mark imprinting LED 106 is made to emit light for a certain period of time, thereby forming a rectangular blip mark 10 of any length.
1B can be formed on the microfilm 101. 101B' in FIG. 5 shows the case where this light emission time is lengthened to form a long and narrow blip mark.

Although not shown in FIG. 1, the microfilm camera has a 7-segment LED (see FIGS. 5 and 6) for forming a frame counter 101C in the upper margin of each frame of the microfilm 101 (see FIGS. 2 out of 2
05), mirrors, lenses, etc. The light emitted from the 7-segment LED is reflected by a mirror, passes through a lens, and exposes the microfilm 101. Note that this frame counter 101C is imprinted as a continuous number on each frame of the microfilm 101. This frame counter 101C is used for the purpose of searching and managing a certain frame within the microfilm 101.

FIG. 2 is a functional block diagram showing the CPU 201 that controls the operation of the microfilm camera and the members controlled by the CPU 201.

The CPU 201 in FIG. 2 includes an arithmetic unit, a RAM, a ROM, an input/output interface,
It is composed of: Since these members are common, their explanations will be omitted. The photographing key 202 is used to instruct the microfilm camera to start or stop photographing operation. Photography Miskey 203 is
This key is used to instruct the CPU 201 to re-expose the frame where the photographing error occurred when a photographing error occurs.

The motors 204A and 204B drive the film reels 114 and 113, respectively, as described above. Further, the motor 204C is a power source that drives the mirror 109. These motors 204A, 20
4B and 204C are each independently controlled by the CPU 201. 7 segment LED 205 for frame counter
The display is controlled by the CPU 201, and as described above, the numerical values displayed on the 7-segment LED 205 are imprinted onto the microfilm 101 under the control of the CPU 201 as well. Furthermore, the CPU 201
It controls the lighting time of the blip mark LED 106, the opening/closing time of the shutter 110, the lighting time of the re-exposure lamp 107, etc.

FIG. 3 is a flow chart for explaining the operation of the microfilm camera. This flowchart is executed by the CPU 201.

Initial settings are made, for example, by turning on the power switch. When the operation of the microfilm camera is started in this way (START), it is determined whether or not the shooting key 202 has been pressed (step S1).
), if the result of the determination is NO, step S1 continues to be executed until the photographing key 202 is pressed. The result of the judgment is YES
If S, the pressure plate 102 is closed and the microfilm 101 is pressed against the aperture 103 (step S2
). Subsequently, the shutter 110 is opened (step S3).
After the film photographing surface 101A is exposed for a certain period of time, the shutter 110 is closed (step S4). As a result, an image of the document is photographed in one frame on the microfilm 101 by the photographing unit.

Next, the pressure plate 102 is opened (step S5).
), the microfilm 101 that had been pressed against the aperture 103 becomes able to travel. The film reel 114 on the take-up side begins to rotate upon receiving power from the motor 204A. Therefore, the microfilm 101 starts running from the film feed roller 112 toward the film take-up roller 111. At the same time, the film winding roller 11
Start measuring the rotation angle of 1. For example, counting of film feed start pulses is started (step S6). This pulse count is performed by counting a pattern written in advance at equal intervals on the outer periphery of the film winding roller 111 using an optical means such as a photosensor.

Then, while the microfilm 101 is traveling from the film reel 113 to the film reel 114, the blip mark driving LED 106 emits light for a certain period of time (step S7). As a result, a blip mark 101B of the required length is imprinted on the lower margin of the photographing surface 101A of the microfilm 101. In FIGS. 5 and 6, this blip mark 101B is shown as a short rectangle.

Next, the 7-segment LED 205 for frame counter imprinting is intermittently lit four times at short time intervals (step S8). As a result, microfilm 1
A frame counter 101C consisting of a four-digit number is printed in the upper margin of the frame 01.

[0030] Then, when the pulse value whose count is started in the step S6 reaches a value corresponding to the travel distance of one frame of the microfilm 101, the rotation of the film reel 114 is stopped by the motor 204A (step S9). . As a result, the microfilm 101 is moved 1 time from the film reel 113 to the film reel 114.
Only frames are sent. The original is photographed in this one frame, and a blip mark and a frame counter are also imprinted thereon.

Through this series of steps S1 to S9, the photographing of one frame on the microfilm 101 is completed.

Here, if a photographing error occurs, the user presses the photographing error key 203.

[0033] In the CPU 201, after one frame has been photographed,
It is determined whether or not the shooting mistake key 203 has been pressed (step S10), and if the result of the determination is NO, step S21
is executed, and if YES, steps S11 to S21 are executed.

In step S11, the film reel 113 starts rotating under the power of the motor 204B. Therefore, the microfilm 101 is
6, the film begins to travel from the film take-up roller 111 toward the film feed roller 112. at the same time,
Measurement of the rotation angle of the film winding roller 111 is started. For example, counting of film rewind pulses is started (step S11). When this count value reaches a value equivalent to the traveling distance of one frame of the microfilm 101, the rotation of the film reel 113 stops, and the microfilm 101 is wound on the film reel 113 by one frame, thereby preventing a shooting error. The resulting frame is rewound to the position of the document photographing window of the aperture 103.

Next, the pressure plate 102 is closed (step S
12) The erroneously photographed frame of the film 101 is pressed against the aperture 103.

Then, the motor 204C is started, the mirror 109 is moved to the front of the objective lens 105A of the photographic lens 105, and the re-exposure lamp 107 is made to emit light (step S13). Next, the shutter 110 is opened (step S14), and the light emitted from the re-exposure lamp 107 is
This results in the photographing surface 101A of the frame in which the photographing error occurred being exposed again. After the shutter 110 is opened, the shutter 110 is closed after a certain period of time has elapsed (
Step S15). In this way, the frame in which the photographing error occurred is re-exposed, and the entire surface is uniformly exposed as shown in the photographing surface 101A' in FIGS. 5 and 6.

Next, the pressure plate 102 is opened (step S1
6) The microfilm 101, which had been pressed against the aperture 103, can now run. And motor 204A
When the microfilm 101 is driven to rotate the film reel 114, the microfilm 101 starts running from the film feed roller 112 toward the film winding roller 111. At the same time, measurement of the rotation angle of the film winding roller 111 is started by counting film feed start pulses (step S17).

While the microfilm 101 is traveling from the film reel 113 to the film reel 114, the blip mark imprinting LED 106 emits light for a certain period of time, and the margin portion of the re-exposed frame of the microfilm 101 is illuminated. A blip mark 101B' of the required length is formed by re-exposure (step S18).
). However, the blip mark 101B' imprinted in step 18 has a longer shape than the normal blip mark 101B, as shown in FIG. The reason for this is that the blip mark 10 in the frame where the shooting error occurred.
This is to prevent 1B' from being searched by the search machine.

When the value started counting in step S17 reaches a value corresponding to the traveling distance of one frame of the microfilm 101, the rotation of the film reel 114 is stopped (step S19). As a result, the microfilm 101 is again fed by one frame from the film feeding roller 112 toward the film winding roller 111.

Next, the value of the frame counter is corrected and returned to the value of the frame counter of the frame in which the photographing error occurred (step S20). As shown in FIG. 5, for example, if a photographing error occurs when the value of the frame counter 101C is "0003", the value of the frame counter 101C' of the next properly photographed frame is corrected to "0003". will be attached.

Next, it is determined whether all the frames on the microfilm 101 have been photographed (step S21), and if the result of the determination is NO, the process returns to step S1 and the steps S1 to S20 described above are executed again. . The result of the judgment is YES
If S, the photographing ends (step S22).

[0042] When photographing a document in each frame using the microfilm camera according to the first embodiment, the blip mark and frame counter are not imprinted in the margin of the frame, and the frame is taken one frame before. You can also imprint the blip mark and frame counter for each frame. As a result, the frame counter is corrected (S20)
, it is no longer necessary to re-expose the long blip mark 101B' as shown in FIG. 5, and only the photographing surface 101A' will be re-exposed for the frame that was photographed incorrectly as shown in FIG.

FIG. 4 shows a part of the configuration of a microfilm camera according to a second embodiment of the present invention.

In this figure, film reels 114, 11
3. Although the film feeding roller 112 and the film winding roller 111 are not shown, it is assumed that these are constructed in the same manner as in FIG. A re-exposure window having the same shape as the window is provided in the aperture 103 at a position one frame away from the rectangular window of the aperture 103 through which the light from the photographing lens 105 passes in the direction of the film winding roller 111. It is being A re-exposure lamp 107 is disposed close to and opposite to this re-exposure window. This re-exposure lamp 107 is controlled and blinked by the CPU. These re-exposure windows and re-exposure lamps 107
This constitutes a re-exposure means as a whole. Further, the mirror 109 and its driving motor 204C in the above embodiment are eliminated. The rest of the configuration is the same as the configuration in FIG. 1, so a description thereof will be omitted.

In the microfilm camera according to the second embodiment, when one frame is photographed, the microfilm 101 is not rewound, and the frame in which the photographing error occurred is placed in the re-exposure window of the aperture 103. Move up to. At this time, if the operator notices a shooting mistake and presses the shooting mistake key 203, the re-exposure lamp 107
emits light. The light emitted by the re-exposure lamp 107 passes through the re-exposure window of the aperture 103 and reaches the photographing surface of the frame in which the photographing error occurred. Therefore, the frame in which the photographing error occurred is re-exposed. Also, when shooting the next frame, 1
By imprinting a blip mark and a frame counter on the previous frame, there is no need to rewind the microfilm in the event of a photographic error. In this way, even if a photographing error occurs on the microfilm 101, re-exposure processing can be performed without rewinding the microfilm 101, and overall photographing speed can be increased.

FIGS. 5 and 6 show a strip-shaped microfilm 1.
01 is a diagram showing a part of 01. Note that since the microfilm 101 is a negative film, when an original written in black ink or the like is photographed, the characters "A, B, C, ..." and their locations on the photographic surface 101A are The brightness and darkness of is reversed. In these figures, the letters A,
B, C... are displayed in black.

According to the above embodiment, the microfilm frame in which the photographing error occurred is re-exposed. In addition, in the microfilm camera according to each of the first and second embodiments, instead of using the re-exposure lamp 107, it is possible to take an aerial photograph of a white board or the like.

[0048]

[Effects of the Invention] As explained above, according to the present invention, even if a photographing error occurs, there is no need to re-photograph all the frames on the microfilm, and even after all the frames on the microfilm have been photographed, It is possible to avoid frequent operations such as cutting out frames in which shooting errors have occurred.

[Brief explanation of drawings]

FIG. 1 is a front view showing a schematic configuration of a microfilm camera according to a first embodiment of the present invention.

FIG. 2 is a block diagram for explaining the functions of the CPU of the microfilm camera according to the first embodiment of the present invention.

FIG. 3 is a flowchart for explaining the operation of the microfilm camera according to the first embodiment of the present invention.

FIG. 4 is a front view showing a schematic configuration of a microfilm camera according to a second embodiment of the present invention.

FIG. 5 is a front view of a microfilm for explaining re-exposure of a frame according to an embodiment of the present invention.

FIG. 6 is a front view showing a microfilm according to an example of the present invention, similar to FIG. 5;

[Explanation of symbols]

101 Microfilm 103 Aperture 107 Re-exposure lamp 109 Mirror 110 Shutter 120 Re-exposure means

Claims (1)

[Claims] 1. A microfilm camera that exposes a strip of microfilm one frame at a time, the camera comprising re-exposure means for further exposing already exposed frames of the microfilm.