JPS59132072A - Retrieving device for microfilm reader - Google Patents

Abstract

PURPOSE:To facilitate the retrieval by indicating which channel is retrieved when a duo film is used and processing a +1 or -1 frame feeding command as a command concerning a displayed picture row. CONSTITUTION:A desired frame number Y to be retrieved is inputted from an input device 70 to a storage circuit 71 and is stored; and when a retrieval start button is depressed, a frame number (x) of a channel A of contents of a counting circuit 72 and contents Y of the storage circuit are compared with each other by a comparator 73, and a signal of x>Y, x<Y, or x=Y is outputted in accordance with the result. In case of x>Y, a film is fed from a take-up reel to a cartridge direction. When a mark on the film reaches a lower mark detector, the counting circuit 72 is counted to subtract. Contents of the counting circuit 72 and contents Y of the storage circuit 71 are compared with each other by the comparator 73; and if they do not coincide with each other, the film is fed continuously, and a coincidence signal is outputted from the comparator 73 when they coincide with each other, and a control circuit 74 stops a film driving motor 75 by this coincidence signal.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a microfilm having a search device capable of searching for a desired image by counting the marks on a microfilm in which images and marks are recorded in at least two columns. This invention relates to a 1-note printer or a microfilm reader printer (hereinafter collectively referred to as a microfilm reader).

Conventionally, a 74/L□ film used in a search device built into a film reader, etc., has a film 2 on which a large number of images 1 are recorded in one row, as shown in FIG.
As shown in FIG. 2, there is a film 4 on which a large number of images 3.32 are recorded in two rows.

On these films, search marks m having different densities from the surrounding areas are written on each side of each image, and searches are performed using these marks.

That is, when using the film 2, the search device illuminates with a mark mf lamp provided on the side of the film 2,
When the film is moved, a mark detector detects changes in the light blocked by the marks, the output signal of this mark detector (a signal corresponding to the number of changes in light) is counted by a counter, and then The comparator circuit compares the counted contents of this counter with the desired frame number input from the keypad, etc., and when the two match, a stop signal is sent from the Hiton circuit to the drive control circuit.
The WrW frame in the film is automatically searched by stopping the drive system for transporting the film and stopping the desired frame at a predetermined position to be projected onto the screen.

On the other hand, when using film 4, this means that you take images on one side of the film starting from the leading edge of the film, and once you have finished shooting on one side, you load the film in reverse and print images on one side of the remaining film starting from the trailing edge. This film 4 is produced by a photographing method called Duo, in which images are photographed back and forth in the order in which the artist is photographed.
In a search device that uses the above-mentioned method of searching for film 2, the idea is to extend the search method for film 2, in other words, one side of the film and the other are treated as if they are continuous, and the search is performed first to the rear end of the column on one side, and then to the end of the film. The feed direction is reversed and the other column is searched from the rear end, and when the input frame number and the count content from the mark detector match, a stop signal is issued and the desired frame is automatically searched. I have to.

The above relationship is expressed by the number attached to the image as the shooting order of the image taken on the film (actually, the number is not recorded in this position, but is recorded in a different position, but for the purpose of explanation) For convenience, each image is numbered inside the frame). In Fig. 2, the left side is the leading edge of the film, and the right side is the trailing edge of the film, and this film 4 has the first image (1 ) and the last image (40th QO) are lined up, and the middle images (2000th and 2001st) are lined up at the rear end on the right side. , the film is sent to the left in the figure, and from the 2001st to the 4000th, the film is sent to the right in the figure to perform a search based on the count of marks m.

By the way, this type of microfilm reader usually
There is no special film for films taken using the duo method shown in Figure 2, and most of them can be used for both films taken using the normal method as shown in Figure 1. When reading a Duo format film using a reader, sometimes it is difficult to know which image row (the lower row shown in Figure 2 is referred to as the A channel and the upper row as the B channel) to search for. It was not easy to use, as it sometimes became difficult to understand.

This is because images of both channels A and B are displayed simultaneously on the screen of the microfilm reader, as shown in Figure 3 (b), and the direction of feed according to the frame number is reversed. This can be said to be a problem that arises due to the fact that

The present invention aims to solve the above-mentioned inconveniences.
The purpose is to provide a search device that does not cause any inconvenience when using film shot in the normal method or in the duo method.Specifically, when using p, B Display which channel is being searched using an appropriate display means so that the image string currently being searched can be clearly seen, and also display the frame number preset and +1 frame or -1 frame advance command. The process is performed as if it were related to an image sequence, thereby facilitating the search.

The gist of the present invention is to move a microfilm on which a large number of images and at least two columns of search marks corresponding to the images are displayed, and to carry out the search in the selected column while the microfilm is being moved. In a retrieval device for a microfilm reader which retrieves a desired image by counting marks, there is provided means for storing which row of images is being searched for, and displaying information stored in the storage means. A switching means for changing the image sequence stored in the storage means, and a means for controlling the moving direction of the microfilm based on the information stored in the storage means. It's in the search device.

The details of the present invention will be described below with reference to the drawings. Figure 4 shows an eye and black film reader to which the present invention is applied. A lamp illuminates the film, 15 is a condensing lens, 16 and 17 are glass plates placed opposite each other across the film movement path, 18 is a capstan roller, 19 is a pinch roller, 2o is a take-up reel, and 21 is a film feeder 9 It is a delivery roller.

The cartridge 11 and take-up reel 20 are connected to a film tensioning and winding motor, and the capstan roller 18 and delivery roller 21 are connected to a film drive motor (indicated by reference numeral 75 in box 7M described later). .

With such a configuration, the microfilm 4 in the cartridge, cartridge, and film is fed out by the feed roller 21, and after being wound around the take-up reel, a tension sheet is placed between the cartridge 11 and the take-up reel 20. Capstan roller 18 in the delivered state
It is wound up on a take-up reel by
The screen is rewound and predetermined images are sequentially guided to the image display position. At the image display position, the microfilm 4 is illuminated between the glass plates 16 and 17 by the light of the lamp 14, and the information of the illuminated frames is projected onto the screen 28.

In addition, 26 is a mark detection device, 27 is a projection lens, and 28
is a screen.

The mark detection device 26 has an upper mark detector 30 and a lower 9 mark detector 31, as shown in FIG.
The rain detector is arranged on a substrate 33 having an opening 32.

The upper mark detector 30 in turn has a light guide member 34.35 consisting of an optical fiber bundle, each light guide member 34.35
The tip of the block 36 passes through a through hole and is opposed to the opening 32, and is arranged along the upper search mark movement path of the film. Similarly, the lower mark detector 31
has a light guide member 37°38 made of an optical fiber bundle,
Each light guide member 37, 38 is disposed opposite the opening 32 through a through hole in the block 390, and is arranged along the path of movement of the lower retrieval mark on the film.

In this example, a light-shielding plate 40e having two apertures as shown in FIG. 6 is provided on the lower surface of the block 36, and each aperture of this light-shielding plate has two apertures. Each light guide member 34
．． 35 are fitted together, so that the distance l between the ends of the light guide members 34 and 35 on both sides is slightly shorter than the length of the mark or mark image on the film used. is given accurately so that the stop position of the mark m and, by extension, the stop position of the image can be accurately performed. It goes without saying that the block 39 also has a similar configuration.

And these party guide members 34, 35, 37
.

The rear ends of 38 are arranged opposite to the light receiving surfaces of photoelectric conversion elements that photoelectrically convert optical signals. Each photoelectric conversion element is connected to a control circuit described later.

- According to the above configuration, when the film drive motor is driven by the search start command to move the film, the lamp 1 enters the light guide section t4' 34.35, 37.38.
4 is blocked by the upper search mark or the lower search mark, the light guide members 34, 35.
Optical signals are generated at 37 and 38, respectively, and these optical signals are sent to the photoelectric conversion elements corresponding to each light guide member and converted into electrical signals.

Note that FIGS. 3(a) and 3(b) show the state observed on the screen 28 when a predetermined image is stopped at the image display position, and FIG. In the case of the film 2 having images, FIG. 3(b) shows the case of a film having two rows of images.

Figure 7 shows the control circuit of the search device, 50.51
, 52, 53 are light guide members 34, 35, 37.

Photoelectric conversion element installed opposite to the rear end surface of 38, 60.61°6
2.63 is an amplifier circuit that amplifies and shapes the input signal, and outputs a high-level ie pulse signal when no light beam is incident on the photoelectric conversion element, that is, when the photoelectric conversion element detects a mark. 64, 65 is an input device (and go), 66 is an or-dart, 70 is an input device such as a key-do, 71 is a memory circuit for storing the desired frame number, and 72 is an input signal input from the mark detector. Counting circuit that performs subtraction, 73
A comparator compares the memory circuit 71 and the counting circuit 72, and a control circuit 74 controls the film drive motor 75 and the like based on the comparison result of the comparator 73.

The input device 70 has numeric buttons for inputting a frame number, a search start button, a channel changeover switch for commanding a channel to be searched, and the like. By switching the channel changeover switch, a υA channel signal or a B channel command signal is generated from the input device 7o.

FIG. 8 shows an example of the control circuit 74.
In the figure, 80 is a flip-flop, which is generated when the film reaches the end (leading or trailing end) K.
The outputs Q and Q are inverted according to the input signal (CK).

In the figure, 86.87 is an or gate, 82.83, 84.85 is an and gate, and the number placed in the input device 7o,
This circuit forms a circuit for determining the film feeding direction based on the relationship with the channel currently being searched.

The signal to the display 76 is transmitted to the flip-flop 8.
For example, when the power is turned on, a reset signal first outputs a signal based on output 4 to search for channel A. This signal advances to the rear end of the film and is then reversed to search for channel B. When performing a search, the termination signal is input at this time and the output of the flip-flop 8° is inverted, so that its Q output becomes 1.

Next, the operation of the above device will be explained.

The present invention is not particularly concerned with single-channel film, so when using film shot in the duo system (
In other words, the search operation for 2-channel films will be explained.

The frame with frame number X on channel A is currently being searched.
Assume that a frame with frame number X of channel A is displayed on the screen. That is, it is assumed that the content of the counting circuit is X. At this time, the output of the flip-flop 80 is 1, and the output of this point terminal is displayed on the display 7 as a channel signal.
6, and the display 76 shows A. Next, when the desired frame number Y to be searched is input from the input device 70 into the memory circuit 71 and stored, and a search start button (not shown) is pressed, the content X of the counting circuit 72 and the content Y of the memory circuit are 73 compares and the result is x>y, x<y
, x=y.

If X=Y, the desired frame is already displayed on the screen, so the device does not take any action. X
) If Y, the device is currently outputting the A channel signal! While the llA channel is being searched, the AND gate 84 is opened and a reverse feed signal is outputted via the OR gate 87, and the film 4 is fed toward the cartridge 11 through the take-up wheel 2o. When the film is fed and the mark m on the film reaches the lower mark detector 31, the search mark m blocks the light incident on the light guide members 37 and 38, and pulse signals are sequentially generated from the amplifier circuits 62 and 63. When the photoelectric conversion elements 52 and 53 simultaneously detect the lower (A channel) mark, the AND gate controller 5 opens and the OR gate 66 enters the counting circuit 72.

Since X>Y at this time, the counting circuit 72 receives a subtraction command signal from the control circuit 74 and subtracts and counts this pulse. At the same time, the upper mark detector 3o also detects the upper (B channel) mark, and the amplifier 60°61 also operates and outputs a pulse signal, but since the AND dart 64 is closed, it does not enter the counting circuit 72. . The content of the counting circuit 72 and the content Y of the memory circuit 71 are compared by a comparator 73, and if they do not match, the film continues to be fed, and when they match, the comparator 73 outputs a match signal. The control circuit 74 stops the film drive motor 75 in response to this coincidence signal. At this time, the desired frame number Y is displayed on the screen and can be read. Then X<
In the case of Y, the AND gate 83 is opened, a forward feed signal is outputted via the OR gate 86, and the film 4 is sent from the cartridge 11 toward the take-up reel 20.

In this case as well, as in the case of reverse feeding, the lower (A channel) mark detector 31 detects the lower mark, and a mark detection pulse is input to the counting circuit 72. Here, counting circuit 7
2, since X<Y, an addition command signal is received from the control circuit 74, and the pulses are added and counted. When the frame with frame number Y is on the A channel, as the film progresses and the contents of the counting circuit 72 and the storage circuit 71 become equal, a match signal is output from the comparison circuit 73, and this causes The control circuit 74 stops the film drive motor 75. However, if the frame with frame number Y is not on the A channel and a matching signal is not output from the comparison circuit even if the film is fed to the end of the film, an end signal is output and the film drive motor 75 is temporarily stopped. . or,
Since the FJ node 80 is inverted by the termination signal, the Q output becomes 1, and the output of this Q terminal is sent to the display 76 as a B channel signal, and the display on the display 76 is switched to B. On the other hand, the AND gate 8
5 opens and reverse feed No. 918 comes out through the or gate 87.
The film drive motor is reversed and the film 4 is now fed in the opposite direction. In this case, since the addition command signal does not change, the counting circuit 72 continues to add and count the upper (B channel) mark signal, and if the contents of the counting circuit 72 and the memory circuit 71 match, a match signal is output from the comparator 73. , the film drive motor 75 is stopped. In this state, the desired frame number Y is displayed on the screen and can be read.

When the frame with frame number Y of the B channel is being displayed, the operation for searching for the next frame number 2 is performed according to the same procedure as described above.

By the way, in addition to the above-mentioned search, there are cases where it is desired to perform a search while sequentially sending one frame at a time with this type of microfilm reader. Even if the image R is displayed, the channel currently being searched can be seen on the display 76, so even if you want to see the frame next to it, you can select either +1 frame forward or 11 frame forward 9 without hesitation. There are conveniences such as being able to command (the film feeding directions for the +1 frame feeding command are opposite to each other for the A channel and the B channel).

In addition, if an erroneous search occurs and it is necessary to input (preset) the number of the frame currently displayed on the screen into the counter 72 in order to correct it, the channel currently being searched will be displayed. According to the display on the counter 76, the frame number of the channel can be read from the screen and inputted to the counting circuit 72 from the input circuit 70.

Furthermore, if it is expected that the desired frame to be searched next is not in the channel currently being searched, that is, frame number 4 is searched and the image shown in FIG. 3(b) K is displayed on the screen. During projection, if the desired frame number of the next frame to be searched is 3500, operate the channel changeover switch to change the search channel to the B channel, issue the B channel command signal, and then Read frame number 8 3997 of the B channel frame displayed on the screen and enter this frame number into the input device 70.
If the desired frame number 3500 is preset in the counting circuit 72, the desired frame number 3500 is inputted into the input device 70, the desired frame number is stored in the storage circuit 71, and then a search start is commanded, the search time can be significantly shortened.

Also, when performing the first search after turning on the power,
If you think that the desired frame exists in the channel, you can shorten the search time by switching the search channel as described above and then performing the same search operation as above. , a film whose frame number does not start from 1 (multiple films containing a large amount of information) 4) When shooting continuously in REM, the frame number of the first frame of the film in which information was shot from the middle of a large amount of information is When searching using the frame number that follows the last frame of another film that was previously manipulated, the necessary presets before the search can be made in the same way.

Note that the display described in the above embodiment does not need to be dedicated, and recent microfilm search devices can search not only for the number of frames, but also for searching for the number of frames in the 11th information group. In the case of a device in which a compound search can be performed by detecting two or more types of marks on a film, there is a numeric display that is not used when searching for a duo-type film, so it may be used for other purposes.

Also, the A channel is considered to be a normal case and does not show any particular thorns.
It may be specially displayed only when searching channels other than A channel such as B channel.Furthermore, the present invention is not limited to Duo format A and 82 channel format film, but can be used for shooting formats with more than one channel. It goes without saying that the present invention can be applied to a retrieval device for photographed microfilm.

[Brief explanation of drawings]

A diagram showing a cleanly projected image (however, the frame numbers are virtual), Figure 4 is a schematic side view of the search device, Figure 5 is an enlarged view of the mark detection section of the search device, and Figure 6 is a mark FIG. 7 is a block circuit diagram of the above-mentioned search device, and FIG. 8 is a diagram showing a part of the control circuit of an embodiment of the present invention. 1.3...Image 2.4...Film m・
・Search mark 11 ・Cartridge 18 ・
... Capstan roller 19 ... Pinch roller 20 ... Take-up reel 26
...Mark detection device 28...Screen 30...
- Upper mark detector 31...lower mark detector

Claims (1)

[Claims] A microfilm on which a large number of images and at least two columns of corresponding search marks are displayed is moved, and while the microfilm is being moved, a desired image is obtained by counting the number of search marks in the selected column. In a search device for a microfilm reader that performs all searches,
means for storing which image column is being searched;
A means for displaying the information stored in the storage means, a switching means for changing the image sequence stored in the storage means, and a means for controlling the moving direction of the microfilm based on the information stored in the storage means are provided. A search device for a microfilm reader characterized by