JPS5846472A - Retrieval device - Google Patents

Abstract

PURPOSE:To obtain an erect image invariably through a simple device by detecting the running direction of a microfilm through one mark detector, moving the film widthwise while reversing the direction at its terminal, and inverting the direction of an image through a prism. CONSTITUTION:A microfilm 4 running at right angles to a paper surface is irradiated with light from a light source 14, and its image is passed through a projection lens 23 and a prims 27, and reflected by reflecting plates 24 and 25 to be formed on a screen 26. The film 4 has detection marks which correspond to images of >=2 lines. The film 4 runs intermittently between glass plates 16 and 17 fixed to a holding base 32, which is moved in directions (a) and (b) by a plunger 34 and a spring 33 to irradiate a desired image line of the film; and microswitches 36 and 37 detect the position of the film, i.e. the image line. When the film comes to its terminal, a mark detecting element 38 generates a signal to reverse the running direction of the film, and the holding base 32 is moved to rotate the prism 27 by a half. Consequently, a desired erect image of the film is obtained easily.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a search device for searching for a desired image on a recording medium in which images are recorded in at least two columns.

A film leader or ψ is a film used in a projection device such as a film reader printer.As shown in FIG.
As shown in the figure, there is a film 4 on which images 3 are recorded in two rows. m is a search mark placed on the side of each image,
The concentration is different from the surrounding area. The shooting method for film numbering is called Duo, in which images are taken sequentially from the leading edge of the film on one side of the film, and once the images have been shot on one side, the film is loaded in reverse, and images are taken sequentially from the trailing edge onto the remaining side of the film. This is a method of photographing images back and forth. In Figure 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 a number attached to the image (actually, the serial number is not recorded like this, but for the sake of explanation) Images are photographed in order (each image is given a number), and search marks m are recorded on both sides of the film in correspondence with each image (frame) in order to search for images.

In this duo shooting film, the orientation of the images in the first row and the images in the second row recorded on the film 4 are different from each other, and the orientation of the number attached to each frame is as shown in Figure 2. It's becoming.

When searching for a desired image on a film using such a film number, a first mark detector that detects the search mark provided on the side of the first row of images and a second mark detector on the side of the second row of images are used. A second mark detector is provided to detect the search mark provided on the side, and images in the first and second rows are simultaneously projected onto a projection surface such as a screen, or one of the two images projected onto the projection surface is provided. It is difficult to immediately know which image is the desired image, and the structure is complicated because the mark detectors are provided in each row, and the equipment is expensive. In particular, this method uses film with images recorded in many rows. In this case, the structure becomes even more complicated and the burden on the user increases.

The present invention provides a search device that eliminates the above drawbacks.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

Figures 3 and 4 show a microphone 1 with a search device to which the present invention is applied.
:I indicates a film reader.

11ij supply reel, 12113 tit guide roller, 14 a lamp for illuminating the microfilm 4 shown in FIG. They are a capstan roller, a 19I/'i pinch roller, and a 20ij take-up reel. The supply reel 1] and the take-up reel 20 are each connected to a film tensioning and winding motor, and are connected to a capstan roller 8u7 (a lumen feeding motor (the torque is larger than the torque of the film tensioning and winding motor 1)). has been done.

The microfilm 4 has a supply reel 11 and a take-up reel 20
The tape is passed between the capstan rollers 18 in forward and reverse directions, and is wound onto a take-up reel or rewound onto a supply reel.

23 projection lenses, 24 the first reflection mirror, 25 the second
The reflecting mirror 26 is a screen.

Projection lens 23, mirror 24, 25 and screen 26
are arranged at fixed positions. Microfilm 4Fi
The image of one selected row is illuminated by the lamp 14, and the light beam transmitted through the microfilm 4 passes through the lens 23, is reflected by the reflection mirror 24° 25, and is directed to the screen 26.
The illuminated film image is enlarged and projected onto a screen 26. 27 is a trapezoidal prism for optically rotating the image projected by the lens 23 around the optical axis. As shown in FIG. 5, the prism 27 is held by a holder 28 which is rotatably disposed on the copper barrel 23' of the lens 23. It meshes with a gear 31 provided on the rotating shaft of a 29-wheel motor 30. Motor 301J
The boulder 28 is rotated through the gear 3 by the drive of the motor 30, and the prism 27 is rotated together with the holder 28, thereby rotating the image projected on the screen 26. It is configured so that you can see the true image.

32 is a holding stand that holds the supply reel 11, kite rollers 12 and 13, glass plate 113.17, capstan roller 18, pinch roller 19, take-up reel 20, etc. Holding stand 32#: t coil spring 33 and solenoid 3
4, and when the solenoid 34 is activated, it moves along the rail 35 in the direction of the arrow a, and when the solenoid 34 is deactivated, it moves in the direction of the arrow a by the action of the coil spring 330 and returns to its original position. Therefore, the film 4 moves together with the holding table 32 in a direction perpendicular to the film feeding direction, and when the solenoid 34 is activated, the image of the first row of the film is placed in the optical path of the lens 23, and when the solenoid 34 is deactivated, The image of the second column of the film is placed in the optical path of the lens 23, and the image of the selected column of the film 4 is positioned in the projection optical path by turning on and off the solenoid 34.

Note that the holding table 32 may be moved by a motor.

36.3'7 is the li placed in the optical path of the lens 23.
! ! The row detector detects the if# row, and is composed of a microswitch, which turns on and off depending on the position of the holding table 32. When the image of the first row of microfilm 4 is placed in the optical path, the first row detector 36 moves to the holding table 32'! r is detected and outputs a high level first row detector number, and when the image of the second row of microfilm is drawn in the optical path, the second row detector 57 detects the holding table 32 and outputs a high level. Level 2
Outputs the column detector number.

A light-receiving atom 38 for detecting a search mark is placed on the back side of the screen 26 and detects a light signal from the search mark m. The light-receiving element consists of a resistor, etc., and is placed at a fixed position, and marks are placed on the side of the image in the first row on the microfilm 4, and marks on the side of the image in the second row are placed on the microfilm 4. Detects the marked mark. When the mark m on the microfilm 4 is opaque (or transparent), when the light from the lamp 14 is blocked (or not blocked) by the mark m, the light receiving element 3 outputs a mark detection signal at a blank level. . In the above embodiment, the light receiving element is placed on the back side of the screen, but it can be placed at any position between the prism and the screen where it can receive the optical signal from the mark.

FIG. 6 shows a horizontal reed device applied to the above-described reader; 40I/'i a keyboard for inputting the search number (frame number) of a desired image; 41 a storage circuit for storing the search number entered on the keyboard; 42 is an addition/subtraction counter that adds or subtracts the mark detection signal output from the mark detector 3B. The counter 42 adds and counts the mark detection signal when it is in the addition state, and subtracts and counts the mark detection signal when it is in the subtraction state. 43 is a comparison circuit that compares the content A of the counter 42 and the content B of the storage circuit 41;
= O, outputs a signal indicating the film feeding direction depending on the sign or negative of the subtraction value 0, and also calculates both (A-B=Q=
Q) When l, outputs a stop signal.

45 is the rearmost il! on microfilm 4! 11 statues (
In Figure 2, the image numbers [2000J, ('200
1 J) is sent to the take-up reel 20.

FIG. 7 shows an example of the trailing edge detector 45, in which the intervals between the marks m detected for each frame of the microfilm 4 are constant, and the mark detection signal outputted when this mark is detected is constant. A timer 46 is provided which operates at a time interval longer than the open time interval of the mark detection signal when the film is running at a predetermined speed, and the mark detector 3B is detected at a desired interval while the film is being fed. While the mark detection signal is being output, the timer 46 is reset, and if the mark detection signal is not generated from the mark detector before the set time of the timer 46 has elapsed, the timer 46 outputs a high-level trailing edge detection signal. A known timer can be used.

In FIG. 6, 47 is a feeding direction changing circuit that outputs a reverse rotation signal when receiving a rear end detection signal from the rear end detector 45;
The 4th is a film feed control circuit. The film feed control circuit 4 controls the film feed motor that drives the capstan roller 18, stops the motor when a stop signal is input from the comparison circuit 43, and receives a reverse rotation signal from the feed direction conversion circuit 47. When this happens, stop the motor and then reverse it.

Note that a brake device (not shown) is actuated by a stop signal output from the comparator circuit 43 to stop the capstan roller 18.
is configured to prevent rotation of the

G, ,G, -----G is an AND gate, OR1~O
R4 is an OR gate, 50 flip-flop circuits, 51
is an initial reset circuit that outputs a high-level signal when the L source switch of the device is turned on. When the power switch of the flip-flop circuit 50 is turned on, the flip-flop circuit 50 is reset by the signal Gi output from the initial reset circuit b1. 521; t A solenoid drive circuit that controls the operation of the solenoid 34, which operates the solenoid 34 when the flip-flop circuit 50 is reset.

This is a motor control circuit that controls the drive of the motor 30 that rotates the 53ii prism 27. When the AND gate G is opened, the motor control circuit 53 rotates the motor 34 in a predetermined direction to rotate the prism so that the image of the second column of the microfilm is projected as a normal image on the screen 26. Further, when the AND gate G8 is opened, the prism is rotated in the opposite direction to that described above so that the image of the first row of the microfilm is projected onto the screen 26 as a normal image.

When the images of each row are projected as normal images on the screen by rotating the prism, the marks of each row! +1 is projected at the same position on the light receiving screen 38, respectively.

Ant games) G and G are opened and closed according to the output signals of the row detectors 36 and 3, and a signal outputted when an ant game) Gl+Gl is opened is added or subtracted by a counter 42.

Antogame) Gs~G51ji? + The controller 42 outputs a signal for addition and subtraction of the digitizer 42.

A signal indicating the feeding direction of the film is input to the signal lines 51 and 52, and when the microfilm 4 is being fed in the direction in which it is wound onto the take-up reel 30 (hereinafter referred to as the forward direction), a signal is input to the signal line 51. A forward feed signal of Hay level is sent, and the direction in which the microfilm number is rewound onto the supply reel 11 (
(hereinafter referred to as forward direction), signal line 5
2, a reverse feed signal of /'t level is sent. The forward and reverse feed signals can be obtained, for example, by using a feed signal output from the comparator circuit 43 or by detecting the rotational direction of the motor that drives the capstan roller 18.

When the first row detection signal is input from the first row detector 36 and the forward feed signal is input, Gs opens and outputs an addition signal.
When the first row detection signal is inputted from the row detector 36 and the reverse feed signal is inputted, it opens and outputs a stem reduction signal.

Furthermore, when the second column detection signal is input from the second column detector 37 and the reverse feed signal is input, the ant game) Gs outputs an addition signal, and the ant game) Gs outputs an addition signal when the second column detection signal is input from the second column detector 37. When the second alignment detection signal is input from , and the forward feed signal is input, a subtraction signal is output.

The counter 42 is switched to the addition state by the addition signal, and switched to the subtraction state by the subtraction signal. In other words, the counter 42 is in an adding state when the microfilm is fed in the forward direction when the image of the first row of the microfilm is located in the projection optical path, and is in the adding state when the microfilm is fed in the backward direction. is in the subtraction state, and when the microfilm is fed in the backward direction while the image of the second column of microfilm is located in the projection optical path, it is in the addition state, and it is in the addition state when it is fed in the forward direction. When it is, it is in a subtraction state.

Next, the operation of the above device will be explained. It is now assumed that the image of the first row of the microfilm 4 is placed on the projection optical path of the projection lens 23, and this image is projected onto the screen 26 as a normal image. At this time, the counter 42 has a count value corresponding to the image number of the image projected on the screen, and the first row detector 36 has a count value corresponding to the image number of the image projected on the screen.
2 is detected and a first column detection signal is output, the flip-flop circuit 50 is reset, and the solenoid 34 is activated. In this state, when the search number of the desired image in the second column of the microfilm 4 is entered on the keyboard 40, A-B=0)0, so a forward feed signal is output from the comparison circuit 43 and the film feed control circuit A film feeding motor is driven via 48, and the microfilm 4 is fed in the direction in which it is wound onto the winding wheel 20. The first row detector 36 detects the holding table and the film is fed in the forward direction, so the AND gate G3 opens and the counter 42 enters the addition state, and the AND gate Gz opens and marks are detected. The mark detection signals outputted from the third day onward are counted in an additive manner by a counter 42.

Then, the image at the rear end of the first row of film (ψ
When the image number 12000J) passes the detection position of the mark detector 3B, a trailing edge detection signal is output from the trailing edge detector 45, and this signal stops the film feeding motor and the film. On the other hand, the rear end detection signal opens the AND gate G, and the output signal from the AND gate Gy sets the 7-lip-flop circuit 50, which deactivates the solenoid, and the action of the spring 33 causes the holding base 32 to move to the noon position. When the area of the second row of microfilm is located in the orthogonal projection optical path by moving in the direction a, that is, when the second row detector 37 detects the holding stand 32, the holding stand 3
2 stops.

After the holding table 32 stops, a reversal signal is output from the feeding direction changing circuit 47, and this reversing signal causes the film feeding control circuit 4 to
The film feeding motor 2 is reversely rotated via B, and the microfilm 4 is fed in the reverse direction. On the other hand, the anime
) Gy output signal drives the motor 30 via the motor control circuit 53, thereby rotating the prism 27,
When the image of the second row on the microfilm is rotated to a position where it is projected as a normal image on the screen 26, the motor 30
stops. Then, the second row detector 37 detects the holding table and the film is fed in the reverse direction, so that the AND gate Ga is opened and the counter 42 is in the addition state, and the AND gate G11 is opened and the mark is marked. Mark detection signals output from the detector 38 are added and counted by a counter 42.

During reverse movement, when the count value of the counter 42 and the search number stored in the storage circuit 41 match, a stop signal is output from the comparison circuit 43. This stop signal stops the film transport motor, stopping the film and placing the desired image in the projection position. Therefore, since the prism 27 is rotated to a predetermined position, the desired image is projected onto the screen 26 as a normal image, and when the search operation is completed, the desired image can be immediately read in the correct state.

Next, from this state, when the search number of the desired image in the first column is entered into the keyboard to start the search, the microfilm is fed in the forward direction, and then the trailing edge detector 45 detects the trailing edge. At this time, the solenoid 34 is activated and the holding base 32 is moved in the direction indicated by the arrow to place the first row of images in the projection optical path. 1
Prism 27 is rotated so that the images of the rows are projected as normal images onto the screen. After the prism has rotated to a predetermined position, the microfilm is fed in the reverse direction, and when the first mark detector 21 detects the search mark corresponding to the desired image, a stop signal is output from the comparison circuit 43, and the film is It stops and the desired image is retrieved.

Note that when microfilm is loaded into a predetermined feeding path and the device is turned on after being put into a starting state, the counter 42 is reset by a signal generated from the initial reset circuit 51 and the solenoid 34 is activated. , the holding stand is configured to be moved so that the image of the first row of the microfilm is located in the projection optical path no matter where the holding stand is located. According to this embodiment, the brightness and resolution of the image on the screen do not change, and the angle of view of the lens does not change.
Since it is only necessary to project the image of l=+ma, the lens becomes inexpensive.

The rear end detector is not limited to the above embodiments, and various known methods can be applied. For example, as shown in FIG. 2, a special mark m' having a shape different from the search mark m is provided at the rear end of the microfilm 4, and this mark m'
The trailing edge of the film can be detected by detecting it with a detector, and the trailing edge of microfilm is usually fixed to the core of the reel, so when the microfilm is fed to the trailing edge, the film is The rear end may be detected by detecting a change in the tension of the film by taking advantage of the fact that the film is not fed due to tension.

Furthermore, in the above embodiments, the film feeding mechanism and the like are moved in the film width direction together with the film, but only the film and reel may be moved in the film width direction.

8 and 9 show another embodiment of the invention, in which the row of images projected onto the screen is changed by moving the projection lens in the width direction of the film instead of moving the film. It is something.

In FIG. 8, the film 4, glass plates 16, 17, etc. are provided at fixed positions, and the projection lens 23 and prism 27 are provided movably in the direction of the arrow, that is, in the width direction of the film.

The projection lens 23II'i is moved integrally with the prism 27 by a solenoid (not shown) to a position where images of the first or second row of the film are projected onto the screen 26, and the prism 27 is moved in response to the movement of the lens 23. Rotate to project a normal image. This solenoid is activated by the output signal of the rear end detector 45. 71tI'i This is a diffusion plate that diffuses the light from the lamp 72. Lamp 72 and condenser lens 73 are configured to simultaneously illuminate the images of both rows of film. In this embodiment, the lens and prism only have to be moved, so they can be moved at high speed. The embodiment of FIG. 9 shows a film 4 and a glass plate 16. A projection lens 23, a prism 7, a lamp 14, and a condensing lens 15 are provided on a movable stage 83. The moving stage 83 is movable in the film width direction, and has a coil spring 84 coupled to one end and a solenoid 85 coupled to the other end. The solenoid 85 is the rear end detector 4 described above.
When the solenoid 85 becomes inactive, the coil spring 84KJ:IJ moving base 83 returns to the original solid line position when the solenoid 85 becomes inactive. When the moving stage 83 is placed at the solid line position, the image of the first row of the microfilm 4 is illuminated by the lamp 14.
The illuminated image is projected onto the projection lens 23 and the prism 27.
, are correctly projected onto the screen 26 by the reflecting mirrors 24, 25. When the movable stage 83 is placed at the position shown by the broken line, the image of the second row of microfilm is illuminated by the lamp 14, and the IK image is illuminated by the projection lenses 1 and 4.
, the prism 27, and the reflection mirror 7-24.25 project onto the screen 26K. According to this embodiment, columns can be selected at high speed and a good lighting effect can be obtained.

In the above embodiment, a film with images recorded in two rows is used, but a film with images recorded in two or more rows can also be used.

Furthermore, the means for rotating the image is not limited to a prism, and any known method can be applied. The recording medium is not limited to film, and various recording sheets can be used.

As described above, according to the present invention, it is possible to automatically position a desired image column on the projection optical path, and it is possible to detect marks in each column while keeping the mark detection means at a fixed position. The construction of the device becomes extremely simple.

[Brief explanation of drawings]

1 and 2 are front views of a microfilm, and FIG. 3 is a schematic configuration diagram of a film reader showing one embodiment of the present invention.
FIG. 4 is a sectional view of the reader, FIG. 5 is a sectional view of the prism rotation mechanism, FIG. 6 is a configuration diagram of the search device, FIG. 7 is a configuration diagram showing one embodiment of the rear end detector, and FIG. 9 are sectional views of essential parts showing another embodiment of the present invention. 4-----Micro film, l 1-----One supply reel, 20-m-take-up reel, 32--One holding stand,
3 B--m-light receiving element.

Claims (3)

[Claims] (1) A feeding means that feeds a recording medium in which images and search marks corresponding to the images are recorded in at least two rows in forward and reverse directions, and a lens that projects images of the selected rows onto a projection surface. and an image rotation means for optically changing the direction of the image projected onto the projection surface, and a mark detection means for detecting a search mark on a recording medium, the mark detection means being connected to the projection surface and the image rotation means. A retrieval device characterized in that the retrieval mark is arranged at a fixed position between the means, and the retrieval mark corresponding to each column of images is projected onto the same position of the mark detection means. (2) The search device according to claim 1, wherein the image of the selected column is positioned in the optical path of the lens by moving the recording medium in a direction perpendicular to the feeding direction. (3) The image of the selected row is positioned on the optical path by moving the lens and the image rotating means in a direction perpendicular to the feeding direction r of the recording medium. Search device.