JPS6239834A - information recording device - Google Patents

Abstract

PURPOSE:To prevent an image of a retrieval use mark from being formed on a recording medium, by detecting an area corresponding to an image of a microfilm, and controlling an image forming area by its signal. CONSTITUTION:At the time 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 prescribed start position, an area in a broken line is projected to a CCD array 15, and image information by light and darkness of an image is inputted and sent successively to a memory circuit and stored. In an operating circuit, based on memory information of the memory circuit, coordinates of front and rear ends (a), (b) and upper and lower ends c1, c2 of the image which has eliminated a retrieval mark are obtained, and an image area is detected. A result of this calculation is sent to a picture frame position determining circuit, and an area for forming an image on a photosensitive drum 12 is determined. When the operation is ended, shutters 16, 18 are controlled by an output from the picture frame position determining circuit, an exposure of the outside of the image area is prevented, and a print on which the retrieval mark and the black frame are not recorded is obtained.

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, a search device built into a film reader etc. uses a film in which a search mark is provided on the side of each frame of the film, and optically detects this -l- mark. By counting this, a desired frame in the film is automatically searched.

The L search device illuminates the mark on film 1 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 using a counter. Then, a comparator circuit compares the counted contents of this counter and the desired frame number inputted from a keyboard, etc., and the result is 1. When this occurs, a stop signal is issued from the comparator circuit to the drive control circuit to stop the drive system for transporting the film and to stop the desired frame at a predetermined position where it will be projected onto the screen-L.

Generally, most of the images recorded on microfilm are negative images, and a so-called reversal development method is used to obtain a copy of a positive image from this negative image. In the reversal development method, when copying is performed using an electrophotographic copying method, development is performed by applying a developing toner having the same polarity as the electrostatic latent image to an electrophotographic photoreceptor on which an 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 3I 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 development is performed by a reversal development method, frame 30 of the photoreceptor-L is Toner adheres to the area corresponding to the outside of the image, and a so-called black frame is recorded around the image on the photoreceptor, as well as search marks are also recorded.Search marks in particular look unsightly and are bad for reproduction products. There are problems such as a decrease in commercial value and, in the case of electrophotographic copying, an increase in toner consumption. To solve this problem, it is possible to place a mask on the surface of the microfilm with an opening corresponding to the size of one frame 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 the screen-L, 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 above-mentioned problems of the prior art, and its purpose is to at least prevent the retrieval mark from being recorded on copy products, etc.
and increase the commercial value of reproduction products, etc., and
It is an object of the present invention to provide an information recording device that 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 -lx. The information recording medium includes a detection means for detecting an area corresponding to an image on the information recording medium, 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 by a signal from the detection means. It is composed of

(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. Also, to and tt are arranged at 90° to each other.
.

12 is a photosensitive drum as an image recording medium;
Reference numeral 13 denotes a shutter base disposed above the photosensitive drum 12 and having a slit 14 along the axial direction of the photosensitive drum 12, and 15 a CC fixed on the shutter base 13 along the longitudinal direction.
D array, 16° 16 is disposed movably along the longitudinal direction on the shutter base r3-+=, and is a first shutter plate that adjusts the opening length of the slit 14; 18 is the lower side of the shutter base 13; This is a second shutter plate that is disposed so as to be movable in the width direction and opens and closes the entire slit 14. The scanning mirror 10.11 is movable in the direction of arrow F or R, and is normally 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 placed within the optical path A. , and then moves in the F direction to direct the projected image of film F to slit 1 through optical path B.
4 to scan and expose the photosensitive drum 12-1-.

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 a microfilm retrieval section. In the figure, 20 is a supply reel, 21 and 22 are guide rollers, 23 and 24 are glass plates arranged oppositely across the film moving path, 25 is a capstan roller, and 26 is a pinch roller.

27 is a take-up reel, and 28 is a mark detector.

The supply reel 20 and take-up reel 27 are connected to a film tensioning and winding motor (not shown), and the capstan roller 251 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 projected onto the screen 9-eye.

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 on the photosensitive drum. 41 is a memory circuit that stores the signal from the CCD 5; 42 is an arithmetic circuit that reads out the stored memory content and analyzes the density pattern of the content; 43 is an image frame position that determines the image area based on the arithmetic result. The determining circuit 44 is a shutter driving circuit that outputs a signal for driving the shutter based on the determined image data.

In the second configuration, 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 F-lx passes through the mark detector 28, it is read by a photoelectric conversion element in the mark detector 28, and is converted into a J1 number by the M device of the search circuit as a mark detection signal to detect the desired frame 30. A search is performed. Since the details of the search circuit are known in Japanese Patent Publication No. 41-260, the description thereof will be omitted here. When the search mark 31 of the desired frame 30 is detected, the drive system stops, the film is moved one tow, 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. ) = projection blur.

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 11 moves to the start position, the area within the broken line shown in FIG. It is sent to circuit 41 and stored. When the movement to the start position is completed, that is, when the entire surface of the screen projected by the CCD array 15 has been scanned, this memory information is transferred to the arithmetic circuit 4.
Sent to 2.

The arithmetic circuit 42 divides the memory information into a large number of narrow areas perpendicular to the scanning direction, and sets the signals of the bright parts in the areas to 0, 0,
This value is added for each row, assuming that the signal in the dark area is 1. Areas where the result of this addition is 0 are bright areas that require border erasure. Also, the point where the addition result changes from zero to positive is one end of the image scanning direction, and the point where the addition result changes from positive to zero is the other end of the image scanning direction. The coordinates a and b of the front end and rear end in the X direction are obtained (42-1 in FIG. 4).

Next, the arithmetic circuit 42 calculates values (y coordinates) for one line at points d and e, which are located within the image by XQ from these two points a and b, respectively.
(42-2 in FIG. 4). That is, for each point d and e, find the maximum and minimum values of the y coordinates of the point where the signal changes from bright to dark or vice versa, and as a result, the maximum value is A on the d line and -L on the e line. B, the minimum value is C on the d-line -1-, and D on the e-line (42 in Fig. 4).
-3). At this time, since the search mark 31 does not exist over the entire length of the image in the scanning direction, the end face of the image is
0 obtained by the smaller value of the y coordinates of point and point B. If there is a difference between the two values, that is, if there is a search mark at the -L end of the image and this is detected, the larger value is the mark. The end face is shown. Similarly, the bottom surface of one image is the y of point 0 and point D.
It is obtained by the larger value of the coordinates (42- in Figure 4).
4). If there is a difference between the two values, that is, if there is a search mark at the bottom of the image and it is detected, the smaller value indicates the edge of the mark.In this way, the search mark 31
Front and rear edges a, b and upper and lower edges CI, c2 of the image excluding
coordinates are obtained and the image region is detected.

Next, this calculation result is sent to the image frame position determining circuit 43,
Here, an area on the photosensitive drum 12 where an image is to be formed is determined. This numerical data is then sent to the shutter drive circuit 44, 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. to be projected. At the same time, at the time of exposure, the second shutter 18 is moved to appropriately block the light from 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.

When the calculation is completed and the movement of the first shutter 16.16 is completed based on the output from the image frame position determination circuit 43, the scanning mirror 10.11 moves in the direction of arrow F, and the photosensitive drum 1
Scan and expose the image on 2-L. At this time, regarding the edges of the image in the scanning direction, as described above, the second shutter 18 prevents exposure outside the image area.

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 respectively disposed around the photosensitive drum, and each one is sequentially provided as the photosensitive drum rotates. Process is applied.

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 using a slit exposure method. During copying, the photosensitive drum 12 rotates at a constant speed in the direction of the arrow, and scanning mirrors to and tt move in the direction of the arrow F in synchronization with the rotation of the photosensitive drum 12, thereby scanning the image on the microfilm onto the photosensitive drum. exposed to light.

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, to detect the -L lower end of the image, detection data at positions that are within the image by a certain amount from the front and rear ends of the image are used. By the way, the search mark on microfilm must be taken at the front of the center of the image (here, the front side of the film means the frame that is earlier in the shooting order), and the search mark is placed at the rear of the image. There is no search mark. Focusing on this point, the front and rear ends a are determined from the data taken into the memory circuit 41.

By finding the point b and then calculating only one row of data at or near the rear end, we can obtain the point (C+) that changes from bright to dark and the point C2 that changes from dark to bright. 1-lower end of the image excluding the mark is shown.

In such a case, the arithmetic circuit becomes simple and the data processing time can be shortened.

Further, 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 this, the first and second shutters may be moved to read image information using the same image sensor. In this case, there is no need to provide another CCD array on the shutter base -1-.

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. It can be placed anywhere in the projection optical system as long as it scans itself. In this case, C
Depending on the arrangement, the CD array can be made smaller. Also, CC
Instead of the D 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 1.

In addition, in the above embodiment, a case was explained in which the front and rear edges and the -L lower edge of the image area are detected to prevent the search mark and black frame from being recorded, but only the 1 - lower edge of the image area is detected. The search mark may be minimally prevented from being recorded.

(Effects of the Invention) The present invention has the following configuration and operation, and detects the area corresponding to the image on the microfilm, and uses the signal to detect the area on the recording medium. Second, since the image forming area is controlled so that the image of the search mark is not formed, the image of the search mark is not recorded on copy products, etc.
High quality images can be recorded.

[Brief explanation of the drawing]

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 apparatus shown in FIG. 1, FIG. 5 is a plan view showing the image area detection process in the circuit shown in FIG. 4, and FIG. 6 shows the other side of the microfilm. FIG. Explanation of symbols 12...Photosensitive drum 13...Shutter base 14...Slint 15...CCD array 16...First shutter 18...Second shutter 30...Frame 31...Search mark 41
...Memory circuit 42...Arithmetic circuit 43...
Image frame position determination circuit 44...Shutter drive circuit F...Microfilm

Claims (3)

[Claims] (1) In 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 the image recording medium to light, a detection means for detecting an area corresponding to the image of the information recording medium. and a control means for controlling an image recording area so that an image of a search mark is not recorded on an image recording medium by a signal from the detection means. (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.