JPS60258679A - Retrieving device - Google Patents

Abstract

PURPOSE:To use various recording media without damaging a connection cord and to perform accurate retrieval by arranging tips of optical fibers in the moving direction of a film and moving them in the film moving direction. CONSTITUTION:Tips of respective optical fibars 25-27 of a mark detector 11 are positioned at the edge part of an opening 20 bored in a block 22 and arranged along the mark movement passage of the film. The block 22 is provided with masks 281, 282, and 283. The tip of the optical fiber 25 is fitted in the through hole of the mask 281, the mask 281 and tip of the optical fiber 27 are fitted in the through-hole of the mask 282, and they move together with the masks. The masks 281 and 282 are moved properly as shown by an arrow to shift the optical fibers 25 and 27 in tip position, adjusting the stop position of a film frame.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a search device that automatically searches for a desired image on a recording medium by detecting marks on the recording medium.

Conventionally, films used in search devices built into microfilm readers and the like have counting marks on the side edges of each frame of the film, and by detecting these marks, the desired frame of film J- can be found. is automatically searched.

1- The search device illuminates the mark on the film with a lamp, uses a mark detector to detect changes in the light blocked by the mark when the film is moved, and counts the output signal of this mark detector with a counter. Then, a comparator circuit compares the counted contents of this counter with the desired frame number entered from the keyboard, and when the two match, a stop signal is issued from the comparator circuit to the drive control circuit, and the drive system that transports the film is stopped. Then, the desired frame is made to stand still at a predetermined position projected onto the screen l-. Normally, a mark detector has multiple photoelectric conversion elements to prevent false signals from being generated due to dust or scratches on the film, or to define the stop position of the frame. They are spaced apart at intervals slightly shorter than the length of the film, and are arranged short in the direction of movement of the film.

However, there is no problem with the desired frame search device configured in this way as long as the shape of the mark on the film or the recording position of the mark is constant, but since the shape of the mark is standardized, it is not commonly used. There are various film marks with different lengths, and some with different relative positions between frames and marks, so when searching using these various films, it is difficult to correctly locate the marks. Problems arise in that detection is not possible or that the stopping position of the frame varies depending on the film. ”
- In order to solve the above problem, it is possible to move the mark detector equipped with the photoelectric conversion element or move the photoelectric conversion element itself, but in the former case, the mechanism for moving the mark detector becomes complicated and the cost increases. In the latter case, the photoelectric conversion element itself moves, causing damage to the cord connecting the photoelectric conversion element and the search circuit, and if the length of the mark is short, the position of the photoelectric conversion element The disadvantage is that it is difficult to adjust.

In view of the above circumstances, it is an object of the present invention to provide a retrieval device with a simple structure that allows accurate retrieval using two types of recording media without the risk of damaging the connection cord.

The present invention will be explained below with reference to embodiments shown in the drawings.

Figure 1 shows a microfilm reader to which the present invention is applied.6 In the figure, ■ indicates a supply reel, 2
．． 3 is a guide roller, 4 is a lamp for illuminating the microfilm, 5 is a condensing lens, 6.7 is a glass plate placed oppositely across the film movement path, and 8 is a capstan roller.

9 is a pinch roller, and 10 is a take-up reel.

The supply reel 1 and take-up reel 1-0 are connected to a film tensioning and winding motor, and the capstan roller 8 is connected to a film drive motor.

The microfilm F is stretched between the supply reel 1 and the take-up reel 10, and is wound onto the take-up reel or rewound onto the supply reel by driving the capstan roller 8. Il
lll-k detector.

12 is a projection lens, and 13 is a screen.

As shown in FIG. 2, the microfilm F has frames 15 in which images are recorded and large-sized marks 16 with different densities from the periphery formed on the side edges of each frame.
7, the frame is illuminated by the light from the lamp 4, and an image of the illuminated frame is projected onto the screen 13-1-.

As shown in FIG. 2, the mark detector 11 has a movable substrate 21 having an aperture 20, and optical fibers 25, 26, 27 disposed on the substrate.
The tip of the mark is located at the edge of the opening 20 provided in the block 22, and is arranged along the mark movement path of the film.

The block 22 includes three masks 281, 282, 2 along the mark movement path as shown in FIGS. 3 and 8.
83, the masks 281 and 282 are movable in the mark movement direction, and the mask 283 is connected to the block 2.
It is fixed at 2. The tip of the optical fiber 25 is a mask 28
1 and moves together with the mask 281. Further, the tip of the optical fiber 27 is fitted into a through hole of the mask 282 and moves together with the mask 282. The tip of the optical fiber 26 is fitted into a through hole of a fixed mask 283.

The tips of each optical edge #25-27 are arranged side by side in the film movement direction, and the spacing between the tips of the outermost optical fibers 25 and 27 is set to be slightly smaller than the length of the mark 16 or the image of this mark. ing. Optical edge @25.
The rear ends of the blocks 26 and 27 pass through the through holes 291, 292, and 293 of the second block 29 on the substrate 21 and protrude to the opposite side. 'Furthermore, the second block 29 has through holes 294 and 29 into which the optical fiber 30 for code signal generation can be inserted.
5-296 is provided, and both ends of the optical edge m30 are provided with holes 29.
It is inserted into 5.29B. The substrate 21 is configured to be removably attached to a predetermined position on a support body 36 provided on the main body of the apparatus.

A third block 37 having a through hole at a position corresponding to the through hole of the second block 29 is fixed to the support stand 36, and the second optical fiber 40 is inserted into the hole of the third block 41, 42-4.
3, 44-45 are respectively inserted, and each optical fiber 40-45 passes through the hole and projects to the opposite side of the third block.

When the substrate 21 is mounted at a predetermined position on the support stand 36, the corresponding holes of the second block 29 and the third block 37 are faced to each other, and the rear ends of the optical fibers 25 to 27 on the substrate 21 and the second The tips of the optical ij [t40 to t42 face each other and are optically coupled.

The second block 29 is fitted into the recess of the third block 37 so that unnecessary light rays do not enter the joint between the two optical fibers from the outside.

The rear ends of the second optical fibers 40-41, 42, 43, and 44 are arranged opposite to photoelectric conversion elements that receive the light transmitted by each optical fiber.

Further, the rear end of the second optical fiber 45 is provided opposite to a light source consisting of a lamp, a light emitting diode, or the like.

Each photoelectric conversion element is disposed at a predetermined position in the main body of the apparatus, and is connected to a control circuit to be described later. When the board 21 is installed in a predetermined position on the main body of the apparatus and a search start is commanded to drive the film drive motor, the film moves, and while the film is moving, the light rays from the lamp 4 that enter the optical fibers 25, 26, 27 are Optical ffl by being interrupted by marks
Optical signals are generated in the optical fibers 25, 26.27, respectively, and are transmitted to the second optical fibers 40, 41.42 through the optical IIh fibers 25, 26.27, respectively, and then sent to each photoelectric conversion element. and converted into electronic time.

The ft56 diagram shows the control circuit of the search device.
51, 52, 53 and 54 are second optical fibers 40, 41, 4
Photoelectric conversion elements 2, 43, and 44 are provided opposite to each other, and 55 is a light source provided opposite to the second optical fiber 45. 60・61・62・
Reference numerals 63-64 denote amplifier circuits for amplifying and shaping input signals, which output a high-level signal when no light is incident on the connected photoelectric conversion element, and output a low-level signal when light is incident. 65-66 and 67-68 are AND gates, 69 is OR gate, and 70 is Into-Yu.

Next, the operation of the above device will be explained. Note that the mark detector 11 shown in FIG. 2 is constructed using a film 1.2 having a large-sized mark 16 in which the light rays incident on the optical fiber 25φ26-27 are simultaneously bent by the mark, as shown in FIG. Applicable when using F. When the substrate 2] is mounted at a predetermined position on the support base 36, the second optical fibers 44 and 4
5 is the optical lJk for code signal generation! Light from the light source 55 optically coupled by lI'30 and transmitted by the second optical fiber 45 passes through the optical fiber 30 to the second optical fiber 45.
Sent on h9.44.

Therefore, no light enters the photoelectric conversion element 53, and the amplifier 63 generates a high-level signal.

Next, when the frame number of a desired frame is input into the search device, the search command causes the cab scan roller 8 to rotate, the film F moves in the direction in which it is wound onto the take-up reel 10, and the optical signal of the mark 16 is converted into a photoelectric converter. They are sequentially detected by elements 50, 51, and 52, and pulse signals are generated from amplifier circuits 60-61, 62. First, when the photoelectric conversion elements 50 and 51 simultaneously detect the mark 16, the AND gate 65 opens, and then when the photoelectric conversion elements 51 and 52 simultaneously detect the mark, the AND gate 66 opens Btl<. both and gate 6
When 5 and 66 open at the same time, AND gate 68 opens, and the signal output from 1 and 68 at this time is sent as a mark detection signal to the counter of the search circuit and counted, and the desired frame is searched. It is done. The details of the search circuit are well known in Japanese Patent Publication No. 41-260, so a description thereof will be omitted. During the above search operation, the light source 5 is connected to the photoelectric conversion element 54.
Since the light of No. 5 is incident, the AND gate 67 remains closed. Therefore, in the mark detector 11, since the optical fiber 30 is arranged as shown in the figure, the output of the photoelectric conversion element 53 is "
A code signal of "1" is generated.

This code signal controls the opening and closing of the AND gates 66 and 67.

When the mark detector 11 detects the mark of the desired frame, the drive system is stopped by the mark detection signal outputted from the AND gate 68, and the mark of the desired frame simultaneously causes the incident light to the photoelectric conversion elements 50, 51, and 52. The film comes to a standstill when the shielded state f9'r, that is, the relative position of the optical @@25, 26, 27 and the mark 16 reaches the state shown in FIG. 4. Even when the film is moved in the opposite direction to that described above and stopped, the film frame stop position 1 remains as shown in FIG. 4, and the stop position remains constant regardless of the direction of movement of the film nozzle.

Next, a case will be described in which, in place of the film F, a smaller film F' shown in FIG. 5 having a mark 16' smaller than the mark 16 is used. small size mark 16
When using a film F' that has a different value, it is replaced with a smaller mark detector 111 as shown in FIG. Mark detector 1
1'1 has the same structure as the embodiment shown in Fig. 2, except that the arrangement of the optical fiber for code signal generation is different from the embodiment shown in Fig. 2, and parts with similar functions are designated by the same reference numerals. . One end of the optic 181130 of the mark detector 111 is inserted into the through hole 296 of the second block 29, and the other end is inserted into the through hole 294. Therefore, the mark detector 111 differs from the mark detector shown in FIG. 2 in the arrangement of the optical fiber 30, and does not transmit light to the second optical fiber 44,
The light is transmitted to the optical fiber m43, and thereby the photoelectric conversion element 5
4 produces a code signal of "1", which is different from that of the mark detector when using film F in FIG. 4. Note that the distance between the tips of the optical fibers 25 and 27 is set to be greater than the length of the second mark 16', and the distance between the tips of the light guide members 25 and 26 is set to be greater than the length of the mark 16'. ing. When the film F' is moved by a search command in the same manner as described above, only when the photoelectric conversion elements 50 and 51 simultaneously detect a mark and the photoelectric conversion element 52 does not detect a mark, the AND gate 68 opens and the mark is removed from the AND gate 68. Outputs a detection signal.

Therefore, when the desired frame is searched, the film F stops in the state shown in Figure 5, and the stop position J2 remains constant regardless of the direction of film movement, and after stopping, this frame is immediately observed on the screen 1-. be able to.

If a search is performed using a film in which the relative positions of the frames and marks or the lengths of the marks are slightly different from the predetermined one, the stop 1-position of the frame will deviate from the predetermined position. In this case, the stop position can be adjusted by appropriately moving the masks 281 and 282 in the direction of the arrow to change the position of the tip of the optical fiber 25 and 27.

As described above, according to the present invention, it is possible to perform a search using recording media having various types of marks simply by moving the tip of the optical fiber, and moreover, it is possible to keep the stopping position of the image constant. In addition, the structure of the device is simplified and can be made inexpensive, and since there is no need to move the photoelectric conversion element r- as in the conventional case, there is no risk of damaging the connection cord of the photoelectric conversion element.

[Brief explanation of the drawing]

ptr, x is a main part configuration diagram of a film reader to which the present invention is applied, FIG. 2 is a perspective view of a mark detector, FIG. 3 is a sectional view of a block, and FIGS. 4 and 5 are a diagram showing a photoelectric conversion element and A diagram explaining the positional relationship with the mark, FIG. 6 is a diagram showing a control circuit, and FIG. 7 is a perspective view showing another embodiment of the mark detector.
FIG. 8 is a perspective view of essential parts of the mark detector.

Claims (1)

[Claims] In a device that searches for a desired image on a recording medium by detecting a mark corresponding to the image on the recording medium, the leading end is arranged along the path of movement of the mark, and the light incident from the leading end is directed to the trailing end. a plurality of optical fibers, and a plurality of photoelectric conversion elements disposed corresponding to the optical fibers and receiving the light transmitted by the optical M&fibers, the tips of the optical fibers are arranged in the direction of film movement. A pupil slip retrieval device characterized by being arranged side by side and movable in a film movement direction.