JPS6239832A - Information recorder - Google Patents

Abstract

PURPOSE:To prevent the image of a retrieval use mark from being recorded in an image recording medium, by scanning a photoelectric transducer group to the front from the back of the image, and controlling an image recording area by the data of the time when a prescribed condition is satisfied first. CONSTITUTION:In case of printing a projection image, while scanning mirrors 10, 11 are moved in the direction as indicated with an arrow R from its stand-by position and positioned at a start position, an area in a broken line is scanned and projected to the front from the back of the frame, to a CCD array 15, and information by the light and darkness of an image from the array 15 is inputted to an edge detecting circuit. The edge detecting circuit detects the width C of an image area by the data of the time when both end groups and the center group of the array 15 become bright and dark, respectively, first, and also detects the length L of the image area by bright/dark signals at the time point when the array 15 completes its movement. This data to the image area is sent to a shutter driving circuit, and a shutter 16 is moved so that only the area of width C is projected to a photosensitive drum 12, by which the recording of a retrieval mark can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an information recording device for recording image information on an information recording medium such as a microfilm having a mark for retrieval.

(Prior Art) Conventionally, search devices built into film readers and the like use a film in which a search mark is provided on the side of each frame of the film, and this mark is optically detected.
By incrementing this by @1, the desired frame in the film is automatically searched.

The above retrieval device illuminates the mark on the film-I- 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. A comparator circuit compares the counted contents of this counter with the desired frame number entered from a keyboard, etc., 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 activated. is stopped, and the desired frame is made to stand still at a predetermined position to be projected on the screen.

In general, most of the images recorded on microfilm are negative images, and so-called reversal development method is used to obtain a positive image copy from this negative image.In the 0-reversal development method, copies are made using electrophotographic copying method. In this case, development is performed by applying a developing toner having the same polarity as the electrostatic latent image to the electrophotographic photoreceptor on which the electrostatic latent image has been formed. In other words, after the photoconductor is uniformly charged, a negative image on a microfilm is exposed to the photoconductor, leaving a charge in the unexposed areas of the photoconductor, and applying a charge to the exposed area of the photoconductor where no charge remains. , development is performed by attaching toner charged to the same polarity as the charge remaining in the unexposed area.

Microfilms with negative images generally have a negative image recorded in each frame 30 of the microfilm F, and the periphery of each frame is transparent, as shown in Figure 3.
An opaque search mark 31 is recorded in this peripheral transparent portion. Generally, in a reader printer using microfilm, an area larger than the frame 30 of the microfilm is projected onto the photoreceptor.

(Problems to be Solved by the Invention) However, in the case of such prior art, when a negative image on a microfilm is projected onto a photoreceptor and developed by a reversal development method, the image of the frame IO on the photoreceptor is Toner adheres to the area corresponding to the outside of the photoconductor, and a so-called black frame is recorded around the image on the photoreceptor, as well as search marks are also recorded.The search marks in particular look unsightly and are bad for copying products. There are problems such as a decrease in commercial value and, in the case of electrophotographic copying, an increase in acid consumption of toner. To solve this problem, a mask with an opening corresponding to the size of one frame of the microfilm can be placed on the surface of the microfilm, but with this method, the mask must be changed every time the size of the frame changes. This is inevitably inconvenient, and since the search mark is no longer projected on screen-1, it is no longer possible to search for information using this mark.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art described above, and its purpose is to prevent at least a search mark from being recorded on a copy product, etc. It is an object of the present invention to provide an information recording device which can improve the commercial value of the product and which does not cause any trouble in searching using a search mark.

(Means for Solving the Problems) The present invention provides an information recording apparatus that records image information of an information recording medium having a search mark on the side of the image by exposing it to an image recording medium. A group of photoelectric conversion elements arranged along a direction corresponding to the width direction of the information recording medium and scanned relatively from the rear to the front of the image, and a detection signal of brightness and darkness from the group of photoelectric conversion elements are first detected. A detection means for detecting the width of the image area using the data captured in the photoelectric conversion element group in which the end groups are bright and the center group is dark, and the image recording medium is searched by the signal from the detection means. and a control means for controlling the image recording area so that the image of the mark is not recorded.

(Example) The present invention will be explained below based on illustrated embodiments.

1 and 2 show a microfilm reader printer as an embodiment of the information recording device according to the present invention. In FIG. 1, F is a roll of microfilm as an information recording medium, l is a projection lamp, 2 is a reflecting mirror, 3 is a condenser lens, 4 is a projection lens, 5, 6
, 7.8 are reflecting mirrors, and 9 is a projection screen. Further, 10 and 11 are scanning mirrors arranged at 90 degrees to each other, 12 is a photosensitive drum as an image recording medium, and 1
3 is a shutter base disposed on one side of the photosensitive drum 12 and has a slit 14 along its axial direction; 15 is a CCD array fixed to the shutter base 13J along the longitudinal direction; 16° l6; is disposed on the shutter base 13 so as to be movable along the longitudinal direction, and 18 is a first shutter plate that adjusts the opening length of the shutter base 14; This is a second shutter plate that is arranged so as to open and close the entire slit 14. ]
22 constant scanning error 10. It is movable in the direction of arrow F or R, and is usually retracted to a position away from the projection optical path A in the direction of arrow F. During printing, it is moved in the R direction and positioned at the start position in optical path A. Then, it moves in the F direction and scans and exposes the projected image of the film F through the slit 14 onto the photosensitive drum 12-1- through the optical path B.

At this time, the shutter base 13 also moves in synchronization with the scanning mirrors 10 and 11.

FIG. 2 is a layout diagram showing the microfilm retrieval unit. In FIG. A stun roller, 26 a pinch roller, 27 a take-up reel, and 28 a mark detector.

Supply reel 20 and take-up reel 27 are connected to a film tension and take-up motor (not shown), and capstan roller 25 is connected to a film drive motor (not shown).

Microfilm F has a supply reel 20 and a take-up reel 27
The film is stretched between the two, and is wound onto the take-up reel 27 or rewound onto the supply reel 20 by driving the capstan roller 25.

As shown in FIG. 3, the microfilm F has a negative image recorded in the frame 30 of the microfilm F.
The periphery of each frame is transparent, and an opaque search mark 31 is recorded on one transparent portion of the frame 30.

The film F passes between the glass plates 23, 24 and the illumination device l.

The frame 30 and the search mark 31 are illuminated by the light from 2.3, and the image of the illuminated frame 30 is displayed on the screen 9#Z.
projected on.

The mark detector 28 has a photoelectric conversion element, and when the search mark 31 passes between the photoelectric conversion element and the lighting devices 1, 2.3, the light incident on the photoelectric conversion element is interrupted by the search mark 31. A pulse signal is generated from the photoelectric conversion element. This pulse signal is sent to a counting section as a mark detection signal and counted.

FIG. 4 is a block diagram for detecting the image area of the microfilm and controlling the image forming area of the photosensitive drum L. 41 compares the signals from the CCD array 15 with each other, and this detection signal determines the width of the image area using the data captured when the end groups of the CCD array 15 are bright and the center group is dark. It is a circuit. This edge detection circuit 41 determines the width of the image area as well as the length in the scanning direction. 42 is a shutter drive circuit that drives a shutter drive mechanism (not shown) in response to a signal from the edge detection circuit 41.

By the way, the microfilm F created for searching is
The size and shape of the photographed frames 30 are approximately constant and erect, and the search mark 31 must be photographed on the front side of the center of the frame 30 (here, the front side means the side of the frame that is earlier in the photographing order). is required. Therefore, if the CCD array 15 is scanned from behind the frame 30 as described later, the width of the image area is determined by the data captured when the end groups of the CCD array 15 are bright and the center group is dark. By doing so, the width of the image frame 30 that does not include the detection mark 31 can be detected. Note that when scanning from the front, the search mark may be located at the beginning of the frame, so there is a possibility of misjudgment.

In the configuration described in -1- below, the information recording apparatus according to this embodiment records image information in the following manner. First, when a desired frame number is input into the search device, the capstan roller 25 rotates in response to a search command, and the microfilm F begins to move in the direction in which it is wound onto the take-up reel 27. When the search mark 31 on the film FI- passes through the mark detector 28, it is read by a photoelectric conversion element in the mark detector 28, and is counted by a counter in the search circuit as a mark detection signal to search for the desired frame 30. will be carried out. Since the details of the search circuit are known in Japanese Patent Publication No. 41-260, the description thereof will be omitted here. Desired frame 3
When the 0 search mark 31 is detected, the drive system stops, the film stands still, and the desired frame 30 is projected onto the screen 9 by the projection optical path A via the projection lens 4 and reflection mirrors 5, 6, 7.8. be done.

If you want to print this projected image now, press the print button (
(not shown), the scanning mirror 10.degree. 11 moves from the retracted position in the direction of arrow R and is positioned at a predetermined start position. While the scanning mirror 10.11 moves to the start position, the area within the dashed line shown in FIG. 5 is scanned and projected onto the CCD array 15 on the shutter base 13 from the rear of the frame 30 to the front. Thus, image information based on the brightness of the image from the CCD array 15 is input to the edge detection circuit 41. The edge detection circuit 41 first
When both ends of the CD array 15 are bright and the center group is dark,
That is, the width C of the image area is detected using the data captured when position D is reached. In addition, the edge detection circuit 41
When the CD array 15 finishes moving to the start position, the light and dark signals from the CCD array 15 cause the 1
The length L of the image area is also detected.

Data regarding this image area is then sent to the shutter drive circuit 42, which moves the first shutter 16° 16 via a shutter drive mechanism (not shown) so that only the area of width C shown in FIG. 12. Along with this, the second shutter 18 during exposure
The light from the slit 14 is appropriately blocked by moving the slit 14 so that only an area having a length L shown in FIG. 5 is projected onto the photosensitive drum 12. As a result, only the image of frame 30 of microfilm F is projected onto photosensitive drum 12-L.

When the calculation is completed and the movement of the first shutter 16.16 is completed based on the output from the edge detection circuit 41, the scanning mirror 10.11 moves in the direction of arrow F, and the photosensitive drum 12
Scan and expose the image on top.

At this time, regarding the edges of the image in the scanning direction, as described above, the second shutter 18 prevents exposure of the image area.

i The photosensitive drum 12 is made of a known electrophotographic photosensitive member, and a known charging device, developing device, transfer device, and cleaning device are arranged around the photosensitive drum, and these devices are sequentially installed as the photosensitive drum rotates. Each process is performed.

That is, the photosensitive drum 12 is uniformly charged by a charging device,
The image on the microfilm is exposed at the exposure position,
Next, after being developed with toner from a developing device having the same polarity as the electrostatic latent image, the toner image is transferred to transfer paper by a transfer device, and residual toner is removed by a cleaning device, and the toner image is used repeatedly thereafter. The transfer paper on which the toner image has been transferred is fixed by a known fixing device and then discharged onto a receiving tray.

The image on the microfilm F is exposed onto the photosensitive drum 12-h using a slit exposure method. Copy 1, photosensitive drum 12
rotates at a constant speed in the direction of the arrow, and in synchronization with the rotation of the photosensitive drum 12, the scanning mirror 10.11 moves in the direction of the arrow F, whereby the image on the microfilm is scanned and exposed onto the photosensitive drum.

As described above, since the area other than the image area of the microfilm F is not exposed on the photosensitive drum 12, a print is obtained in which no search mark or black frame is recorded.

In the above embodiment, a case was explained in which an image on a microfilm is exposed to a photosensitive drum and printed. However, instead of the photosensitive drum, an image sensor such as a CCD array is used to read the image information and record it on an optical disk or the like. You can do it like this. In this case, an imaging device such as a CCD array is placed at the exposure position of the photosensitive drum, and when the scanning mirror moves to the start position, the slit is fully opened to capture information about the image area, and the detected image area is Based on the first. The second shutter may be moved to read image information using the same image sensor. In this case, there is no need to provide a separate CCD array on the shutter base-L.

As shown in Figure 6, frame image 3 of microfilm F
0 and the search mark 31 are integrated, C' is similarly set as the image area.

Further, in the illustrated embodiment, a case has been described in which the CCD array 15 is arranged on the shutter base 131-, but the invention is not limited to this, and the CCD array 15 may be arranged anywhere within the scanning optical system. As long as the array itself is scanned, it may be placed anywhere in the projection optical system. in this case,
The CCD array can be downsized depending on its arrangement. Also, C
Instead of the CD array, an arrangement of a plurality of photoelectric conversion elements such as photodiodes may be used.

Further, in the illustrated embodiment, a case has been described in which the image areas at both ends in the scanning direction are controlled by the second shutter 18, but the exposure may be controlled by blinking the projection lamp I.

Furthermore, in the above embodiment, a case was explained in which the front and rear edges and top and bottom edges of the image area are detected to prevent the search mark and black frame from being recorded. It may also be possible to minimize the recording of marks.

(Effects of the Invention) The present invention has the following configuration and operation, in which a group of photoelectric conversion elements is scanned relatively from the rear to the front of an image, and data is used when a predetermined condition is first satisfied. Since the image recording area is controlled so that the image of the search mark is not recorded on the image recording medium, the image of the search mark is not recorded on copy products, etc., and high quality images can be recorded. can be done. Furthermore, since the search mark is not recorded at the rear of the image, the width of the image area can be detected with a simple circuit by scanning the photoelectric conversion element group from the rear of the image to the front. Costs can be reduced and data processing time can be shortened.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a microfilm reader printer as an embodiment of an information recording device according to the present invention, FIG. 2 is a schematic diagram showing a search section of the device, and FIG. 3 is a plan view showing a microfilm. , Fig. 4 is a block diagram showing the control circuit of the device shown in Fig. 1, Fig. 5 is a plan view showing the image area detection process in the circuit of Fig. 4, and Fig. 6 is another example of microfilm. FIG. Explanation of symbols 12... Photosensitive drum 13... Shutter base 14... Slit 15... CCD array 1
6...First shutter 18...Second shutter 30...Co-v 31...Search mark 41...Edge detection circuit 42...Shutter drive circuit F...Micro film

Claims (3)

[Claims] (1) In an information recording device that exposes and records image information of an information recording medium having a search mark on the side of the image, arranged along a direction corresponding to the width direction of the information recording medium. The photoelectric conversion element group is scanned relatively from the back to the front of the image, and the brightness and darkness detection signals from the photoelectric conversion element group are initially set so that both end groups of the photoelectric conversion element group are bright and the center group is dark. a detection means for detecting the width of the image area from the data captured when the detection means is detected, and a control means for controlling the image recording area so that the image of the search mark is not recorded on the image recording medium based on the signal from the detection means. An information recording device comprising: (2) The information recording device according to claim 1, wherein the information recording medium is a microfilm having a negative image. (3) The information recording apparatus according to claim 1 or 2, wherein the control means controls the exposure area on the image recording medium.