JPH06308607A - Microfilm reader and microfilm - Google Patents

Abstract

PURPOSE:To shorten a retrieval time so as to improve efficiency, and to easily correct a frame number in the case a film control code is not read precisely because dust adheres thereto or it is damaged by detecting the frame number by counting blips, reading the film control code separately put corresponding to a film feed direction and performing retrieval even while film is fed in a reverse direction. CONSTITUTION:The film control codes read at the time of feeding the film in a forward direction or reverse direction are separately provided. The content of a counter 70 is rewritten according to a number shown by the film control code read corresponding to the feed direction, and the content of the counter 70 is added or subtracted based on the blip detected therafter. When the film control code can not be read, the film is stopped and the film control code is displayed on a mark display means 82, then an operator inputs the numeral of a mark from a keyboard 76 so as to correct the counted value of the counter 70.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microfilm reader which counts blips attached to each frame number to detect the frame number and at the same time reads a film control code to change the frame number. It relates to a microfilm used for this.

[0002]

2. Description of the Related Art In microfilm, a blip is attached to each frame, the frame number is obtained by counting the blip, and the frame having a target frame number is searched. It is necessary not to count the failed frames for the frames for which the document copy failed.

In addition, a different group number may be assigned to each document group. For example, a group with frame numbers in the 100s and a group with frame numbers in the 50s and 200s may be printed on a common film. In this case, the frame numbers are not continuous with respect to the film feed, and the numbers may be skipped or changed from a large frame number to a small frame number. Therefore, film control codes have been used to change the frame numbers discontinuously by skipping the frame numbers.

FIG. 4 is a view showing an example of the film control code attached to the microfilm. In this figure, reference numeral 10 is a microfilm, and 12 is a frame.
A blip 14 is attached below each frame.

Reference numeral 18 is a film control code, which is imprinted immediately before the frame number is changed. The film control code 18 is written as a bar code, and the film control code 1
In order to distinguish 8 from other blips 14 etc., a black mark having a predetermined length is attached. The film control code 18 usually indicates a number smaller by 1 than the next frame number. For example, the frame number of the frame 12a before the mark 18 is 6 and the frame 12b next to the mark 18 is
When the frame number of 10 is 10
The content of 1 = 9 is written.

[0006]

Problems of the Prior Art This conventional microfilm 10
In the above, it was set to read the film control code 18 and correct the counter when the film 10 is fed in the forward direction. For this reason, it was not possible to search while sending the film in the reverse direction. Therefore, when the film is fed in the reverse direction, it has to be rewound to the beginning of the film and then searched again, which takes time to search and is inefficient.

Since the film control code 18 used here is a bar code, if dust or scratches are attached here, it may not be possible to read it accurately. At this time, there was also the problem that the frame number would go wrong, making accurate search impossible.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a microfilm reader capable of performing a search while feeding a film in the reverse direction, thereby shortening the search time and improving the efficiency. First to do
The purpose of.

A second object is to provide a microfilm reader capable of easily correcting the frame number when the film control code cannot be correctly read due to dust or scratches. A third object is to provide a microfilm used for implementing this microfilm reader.

[0010]

According to the present invention, a first object of the present invention is to detect a frame number by counting the blips attached to each frame, and to separately provide film control codes corresponding to the film feeding direction. Is a microfilm reader for reading a target frame by changing the frame number by reading a mark reading means for reading the blip and film control code, a counter for counting the frame number based on the reading of the blip, and the film. Rewriting control means for correcting the counter on the basis of the content of the control code, and reverse feeding for designating the film control code to be read by the mark reading means by discriminating the film feeding direction and instructing addition or subtraction by the counter Microphone characterized by comprising a discrimination means It is achieved by a film reader.

A second object is to further provide film feed control means for stopping the film feed when the mark reading means cannot read the film control code.
By adding the mark display means for enlarging and displaying the unreadable film control code or the blip before and after the film control code, and the manual correction means for manually correcting the count value of the counter based on the display of the mark display means. Can be achieved.

Here, the film feed control means may be arranged such that the film is suddenly stopped when the film control code cannot be read, or the film control code which cannot be read is fed back. If you copy the number indicating the frame number on the blip or film control code, you can easily read this number and correct the frame number without having to decipher the contents of the control code.

A third object is to provide a microfilm having a blip attached to each frame and a film control code for changing the frame number,
The film control code may be provided by two types corresponding to the feeding direction of the film.

[0014]

1 is a conceptual diagram of a microfilm reader according to the present invention, FIG. 2 is an operation flow chart, FIG. 3 is a diagram showing a structure of mark display means, and FIG. 4 is a diagram showing an example of a film control code.

As shown in FIG. 4, a film control code 18A for the forward direction and a film control code 18a for the reverse direction are attached to the microfilm 10A used here so as to be located on the same locus. There is. These marks 18A and 18a are, for example, changed in length of long black marks at both ends or changed in the number of long black marks so that they can be identified in the forward and reverse directions.

A number 16 indicating a frame number is imprinted near the blip 14 and the film control codes 18A and 18a. For example, the number 0006 is imprinted on the frame 12a immediately before the mark 18A, and the number 0010 is imprinted on the frame 12b immediately after the mark 18a. Further, the number 0009 is imprinted on the forward mark 18A and 0007 is imprinted on the reverse mark 18a.

As shown in FIG. 1, the microfilm 10A is wound on a reel 20 and loaded in a microfilm reader, and wound on the other reel 22 from the reel 20 to run. The light from the light source 24 is guided to the film 10A from below through the condenser lens 26 (FIG. 3), and the light transmitted through the film 10A is projected onto the projection lens 28,
The image rotation prism 30 (FIG. 1), the reflection mirrors 32 and 34,
It is led to the screen 38 from the back side via 36.

A vertically movable plate 4 is provided on the back surface of the screen 38.
0 is provided so as to be movable in the horizontal direction, and a CCD line sensor 42 is attached to the movable plate 40. The movable plate 40 and the line sensor 42 form a scanner 44. Therefore, the projection image on the screen 38 can be read by moving the movable plate 40 in the horizontal direction while reading the image incident on the line sensor 42.

An image can be read and printed by the output of the scanner 44. That is, after the output of the sensor 42 is input to the signal processing means 46 to perform processing such as noise elimination and correction of unevenness in light intensity, the A / D converter 48 and the binarizing circuit 50 binarize the output to the printer 52. You can send it and print it out.

In FIG. 1, reference numeral 60 is a mark detecting light emitter, and 62 is a light receiver, which oppose each other so as to sandwich the trajectory along which the blip 14 and the mark 18 of the film 10A run from above and below. 14 and the marks 18A and 18a are detected and an ON signal is output.

Reference numeral 64 denotes a rotary encoder, which detects the number of rotations of a roller rolling on the film 10A. 66
Is a running amount detecting means for detecting the running amount of the film 10A by integrating the output pulses of the rotary encoder 64. The ON signal of the light receiver 62 and this traveling amount are input to the mark reading means 68, where the blip 1
4 and the marks 18A and 18a are identified, and the content of either one of the marks 18A and 18a is read in correspondence with the film feeding direction.

The mark reading means 68 sends a pulse to the counter 70 when the blip 14 is detected. The counter 70 adds or subtracts 1 to or from the count value corresponding to the forward or reverse feeding direction of the film 10A. Therefore, 1 is added to or subtracted from the counter 70 every time the blip 14 is read, and this count value indicates the frame number.

The mark reading means 68 distinguishes the film control codes 18A and 18a from the blip 14 by the long black marks before and after the film control codes 18A and 18a, and further, based on the length and number of the long black marks at both ends thereof, the forward or backward direction. Determine if it is for use. Then, when the film is fed in the forward direction, the mark 18A for the forward direction is read, and when the film is fed in the reverse direction, the mark 18a for the backward direction is read to determine the content of each bar code.

When the bar code can be read, a mark read signal a indicating the number, which is the content of the bar code, is sent to the rewriting control means 72. The rewriting control means 72 sends a signal b indicating a number, which is the content of the film control codes 18A and 18a, to the counter 70 to rewrite the count value c of the counter 70.

This count value c is sent to the search control means 74. A frame number of the target frame input from the keyboard 76 or another external device is previously input to the search control means 74, and this frame number is compared with the count value c. Then, the motor 64 is rotated forward and backward via the motor control means 78 to feed the film 10 so that the target frame is projected on the screen 38.

Here, the rotating direction of the motor 64, that is, the film feeding direction is discriminated by the reverse feeding discriminating means 79, and the result is inputted to the mark reading means 68 and the counter 70. As described above, the mark reading means 78 corresponds to the mark 18A or 18 corresponding to the forward / reverse feed direction of the film.
Read a. Further, as described above, the counter 70 also adds 1 to each blip when the film feed is in the forward direction, and subtracts 1 when the film feed is in the reverse direction.

When the bar code of the film control codes 18A and 18a cannot be read, the mark reading means 68 sends a feed stop signal d to the film feed control means 80. The motor control means 78 suddenly stops the feeding of the film 10A by the signal e output from the feeding control means 80 based on the feeding stop signal d. Also at this time film 1
The film 10A is returned to the position of the uncontrollable film control code 18A or 18a by reversing 0A.

In FIGS. 1 and 3, reference numeral 82 denotes a mark display means, which is included in the image read by the line sensor 42 and includes the blip 14 and the film control codes 18A and 18a.
Only the image at the position of is extracted and displayed on the display unit made of a CRT or liquid crystal. Since the numeral 16 is also attached to the blip 14 and the film control codes 18A and 18a, the numeral 16 is also displayed here.

The operator reads a number from the image displayed on the mark display means 82 and inputs the number from the keyboard 76 as a manual correction means. This entered number is sent to the rewriting control means 72, and the count value c of the counter 70 is rewritten to this number. Therefore, the frame number for the next frame 12b or 12b of the film control code 18A, 18a becomes normal, and a correct search is performed thereafter.

The above operation will be described with reference to FIG. First, the search control means 74 feeds the film 10A (step 100), and the feeding direction of the film 10A is discriminated by the reverse feeding discrimination means 79 (step 102). When feeding in the forward direction, 1 is added to the counter 70 each time the blip 14 is detected (step 104), and when feeding in the reverse direction, 1 is subtracted from the counter 70. (Step 10
6).

When the count value c of the counter 70 matches the frame number of the target frame (step 108), the film feeding is stopped (step 110), and the printer 52 is stopped.
To start printing (step 112). Film 1 if the count value c does not match the frame number of the target frame
0A is continuously sent in the same direction, and the blip 14 is continuously added or subtracted until the film control codes 18A and 18a appear (steps 114 → 104, 10).
6).

Film control codes 18A, 18
When a is detected (step 114 → YES), it is checked whether the contents of the film control codes 18A and 18a are legible (step 116). If legible, the contents of the counter 70 are rewritten with the legible number (step 116). Step 118). Whenever the film 10A is fed in the same direction as before and a blip is detected, the counter 7
0 is added (step 104) or subtracted (step 106).

Film control codes 18A, 18
When a cannot be read (step 116, NO),
Suddenly stop the film 10A and return it (step 120),
The film control codes 18A and 18a are displayed on the mark display means 82 (step 122). The operator visually confirms the number enlargedly displayed on the mark display means 82, that is, the contents of the film control codes 18A and 18a, and manually inputs this number from the keyboard 76 (step 124). This entered number is counter 7
It is input to 0, and the frame number appearing on the counter 70 is corrected thereafter.

In the above embodiment, when the film control codes 18A and 18a cannot be read, the film 10
Send A in the opposite direction to this mark 18A, 18
The mark a is displayed on the mark display means 82. However, in the present invention, the film 10A may only be stopped suddenly, and the operator may manually feed the film 10 backward. Further, at this time, instead of displaying the film control codes 18A and 18a on the mark display means 82, the frame 12b (see FIG. 4) immediately after the film control codes 18A and 18a,
Further, the blip of the frame 12a and its number (frame number) may be displayed during the backward feeding. At this time, a number obtained by subtracting 1 from the blip number (forward feed) or a number obtained by adding 1 (backward feed) is input from the keyboard.

Further, in this embodiment, since the numeral indicating the frame number is imprinted on the blip 14 and the film control codes 18A and 18a, the mark display means 82 is provided.
The numeral 16 can be read immediately when displayed at. Therefore, the work can be performed efficiently. However, in the present invention, the numeral 16 may be omitted and the bar codes of the film control codes 18A and 18a may be read visually.

FIGS. 5 and 6 are views showing another embodiment of the mark display means. In the embodiment shown in FIG. 5, images of the film control codes 18A and 18a of the film 10A are
The image is guided to the CCD sensor 204 via the prism 200 and the imaging lens 202, and is read and displayed on the mark display means 82 made of a CRT or liquid crystal.

The embodiment shown in FIG. 6 is provided with a prism assembly 210 which can move upward and backward above the blip 14 and the film control cords 18A and 18a. The prism assembly 210 normally waits at the virtual line position 210A that has exited from the film 10 and advances to the solid line position when the film control codes 18A and 18a cannot be read. The prism assembly 210 reflects the image of the film control code 18 at the advancing position on the reflecting mirrors 32 and 3.
It leads to the screen 38 by 4, 36. Therefore, the operator reads the numbers of the frame numbers from the images of the film control codes 18A and 18a displayed on the screen 38 and inputs them into the keyboard 76.

7 and 8 are views showing another embodiment of the film control code. Film 10 shown in FIG.
Film control code 18B for forward in B
And the film control code 18b in the opposite direction were separately printed along different side edges of the film 10B. Therefore, when this film 10B is used, it is necessary to provide two mark display means for separately enlarging and displaying both marks 10B and 10b, or to provide a mark display means for selectively enlarging one of the marks.

In the film 18c shown in FIG. 8, the film control codes 18C and 18c for the forward and reverse directions are continuously provided on the same locus. When this film 10C is used, the mark reading means 68 is, for example, one of the film control codes 18C or 18 read at the beginning.
Predetermine to use c.

[0040]

As described above, according to the first aspect of the present invention, the film control codes for reading the film in the forward and backward directions are separately provided, and the number indicated by the film control code read in correspondence with the feeding direction. The counter is rewritten, and the counter content is added or subtracted based on the blip detected after that, so you can search for the target frame while feeding the film in the reverse direction, and the search time will be greatly increased. It is possible to improve the work efficiency by shortening to.

According to the second aspect of the present invention, when the film control code cannot be read due to dust or scratches, the film is stopped, and the unreadable film control code is displayed on the mark display means before the operation. Since the person visually checks the mark display means and inputs the number from the manual correction means such as a keyboard to correct the count value of the counter, the frame number can be easily and promptly corrected.

If not only stopping the film when the film control code is unreadable but also automatically returning the film to the film control code, the work becomes easier (claim 3). In addition, if a number indicating the frame number is imprinted on at least one of the blip and film control code, this number can be read directly from the screen of the mark display means, so there is no need to visually read the bar code, etc. It becomes easier (claim 4). Further, according to the invention of claim 5, a microfilm directly used for implementing the microfilm reader can be obtained.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an embodiment of a microfilm reader of the present invention.

[Fig. 2] Operation flow chart

FIG. 3 is an explanatory view of mark display means.

FIG. 4 is an explanatory diagram of a film control code.

FIG. 5 is a diagram showing another embodiment of the mark display means.

FIG. 6 is a diagram showing another embodiment of the mark display means.

FIG. 7 is a diagram showing another embodiment of the film control code.

FIG. 8 is a diagram showing another embodiment of the film control code.

FIG. 9 is an explanatory diagram of a conventional film control code.

[Explanation of symbols]

10, 10A, 10B, 10C Microfilm 12 frame 14 Blip 18, 18A, 18a, 18B, 18b, 18C, 18
c film control code 38 screen 68 mark reading means 70 counter 72 rewriting control means 76 keyboard as manual correction means 78 motor control means 79 reverse rotation determination means 80 film feed control means 82 mark display means

Claims (6)

[Claims] 1. The number of blips attached to each frame is counted to detect the frame number, and the film number is changed by reading the film control code attached to each film corresponding to the film feeding direction. A microfilm reader for searching, comprising mark reading means for reading the blip and film control code, a counter for counting the frame number based on the reading of the blip, and modifying the counter based on the content of the film control code. And a reverse feed determining means for determining the film feeding direction by specifying the film control code to be read by the mark reading means and for instructing addition or subtraction by the counter. Film reader. 2. The microfilm reader according to claim 1, further comprising film feed control means for stopping the film feed when the mark reading means cannot read the film control code, and the unreadable film control code or before and after the film control code. A microfilm reader comprising mark display means for enlarging and displaying the blip of No. 1 and manual correction means for manually correcting the count value of the counter based on the display of the mark display means. 3. The microfilm reader according to claim 2, wherein said film feed control means, when the film control code cannot be read, reversely feeds the film to this unreadable film control code. 4. A microfilm reader according to claim 2, wherein at least one of the blip and the film control code is provided with a numeral indicating a frame number, and the mark display means can magnify and display the numeral. 5. In a microfilm having a blip attached to each frame and a film control code for changing a frame number, the film control code is attached separately corresponding to a film feeding direction. A microfilm characterized by being. 6. The microfilm according to claim 5, wherein a numeral indicating a frame number is imprinted on at least one of the film control code and a blip adjacent to the film control code.