JPH01102592A - Image processor - Google Patents

Abstract

PURPOSE:To execute only copying for a designated area so that no black frame nor black band is generated by obstructing an exposure by an exposure obstructing means, as for other area than a partial exposure area to a photosensitive body which is set. CONSTITUTION:Between a setting means for setting a partial exposure area to a photosensitive body 28 and an image exposure area to the photosensitive body 28, an exposure obstructing means 31 for obstructing an exposure plural times based on a signal from the setting means is provided. Therefore, as for other area than a partial exposure area to the photosensitive body 28 set by the setting means, the exposure is obstructed by the exposure obstructing means 31, therefore, only copying for a designated area is executed. In such a way, it becomes possible that no black frame nor black band is generated in a document which is obtained by copying.

Description

[Detailed Description of the Invention] The present invention provides a function to project an image recorded on a microfilm onto a screen for viewing, and to project this image onto a photoreceptor to make a copy. The present invention relates to an image processing device having:

In recent years, image processing devices have been used in various fields, but
Among these image processing devices, there is one that recopies images recorded on microfilm by projecting them onto a screen.

Microfilm is capable of recording high-density information.

Has semi-permanent preservation. Because it has unique features that are different from information recording media commonly used in recent years, such as readability, it can be used as an analog information recording medium for still image files in various fields that can take advantage of this feature. The forms of microfilm include microroll film, in which images are recorded on a roll of film, and microfiche film, in which images are recorded on a single sheet. Since images are recorded at a high density, an image processing device is required to search for the necessary image from among these, enlarge and project this image as necessary, or photoelectrically convert and copy this image. becomes.

There is an image processing device having such a function as shown in FIG. A screen 3 that magnifies and projects an image using a lens 2, a copying device (not shown) that copies the image onto paper stored in cassettes 4A and 4B, and instructions such as the number of copies to be made and the start of copying are sent to this copying device. It is equipped with an operation panel 5 that provides a copy size, and an operation panel 6 that includes switches for specifying copy size, etc.
When copying an image recorded on microfilm, the searcher first places the image to be copied on screen 3.
The image is projected onto the screen, and the magnification of the lens 2 is adjusted to enlarge or reduce the image to a size suitable for copying.

Note that the operation panel 5 shown in FIG. 21 includes a number key 5A,
An indicator 5B, a print key 5C, a zoom key 5D, a focus key 5E, a clear key 5F and other keys are provided, and various instructions are given to the copying device etc. using these keys. There is.

The day is -2 1. ``However, with conventional image processing devices like this,
When copying, it is often difficult to match the area occupied by the microfilm image completely with the imaging area (the area copied by the copying device), and in this way, the area occupied by the microfilm image is If you copy under conditions where the image area does not completely match the image forming area, a black frame may appear around the document. In other words, as shown in FIG. 22, for example, if a copy is made when the area occupied by the image on the microfilm is narrower than the imaging area, a black frame 10 will be printed around the copied document, resulting in an undesirable appearance. Bad manuscript.

Become. In order to make this a good-looking document, it is necessary to cut out the black frame portion 10 with scissors or the like and copy it again using another copying machine.

Further, when the black frame portion 10 is printed in this way, there are various problems such as wasted developer consumption, which is uneconomical. In order to solve this problem, for example, as disclosed in Japanese Patent Laid-Open No. 60-49360, by specifying the area to be copied, only the specified area can be copied. There is technology. However, even with this technology, as shown in Figure 22, when two images on microfilm are copied onto one sheet of paper at once (in the case of microfilm copying, (I often make copies.)
In this case, printing of the black band 11 at the center of the copy is avoided. Therefore, when making such a copy, the above-mentioned problem still remains.

The present invention was made in order to solve these conventional problems.As in the case of copying two images on microfilm onto one sheet of paper at once, multiple To provide an image processing device capable of making a good-looking copy even when there is a copy-unnecessary area.

To achieve the above object, the present invention records an image on an information recording medium by scanning an image on the information recording medium and exposing the image to a photoreceptor. In an image processing apparatus for copying an image, a setting means for setting a partial exposure area on the photoreceptor, and an exposure for blocking the exposure a plurality of times based on a signal from the setting means between image exposure on the photoreceptor. The invention is characterized by having a blocking means.

With this configuration, the exposure prevention means prevents exposure of areas other than the partial exposure area of the photoconductor set by the setting means, so that only the designated area is copied. , it becomes possible to prevent not only black frames but also black bands from occurring in the original obtained by copying.

Embodiments] Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 shows a configuration diagram of an optical path system of an image processing apparatus according to the present invention. This optical path system can be roughly divided into a reader system shown by a solid line in the figure and a printer system shown by a dotted chain line in the figure.

In the optical path of the reader system, light emitted from a lamp 20 passes through a condenser lens group 21 to illuminate an image recorded on a microfilm 22, which is an information recording medium, passes through this image, and is projected by a lens 2. The light is reflected by the mirror 23. The image is reflected in order from the mirror 24 and reaches the screen 3, and the image is projected onto the screen 3 at a predetermined magnification. Note that LEDs (not shown) are closely arranged on two vertical and horizontal sides around the screen 3, and the scanning range between the vertical and horizontal axes of the lit LEDs is the imaging area (partial exposure area). equivalent). Then, the image recorded on the microfilm 22 is transferred to the screen 3.
The magnification of the image projected onto the screen is determined by adjusting the magnification of the lens 2. Adjustment of the magnification of the lens 2 is performed by operating the zoom key 5D provided on the operation panel 5 shown in FIG. .

Next, in the optical path of the printer system, the light emitted from the lamp 20 illuminates the image recorded on the microfilm 22 via the condenser lens group 21, passes through this image, and is projected by the lens 2. The light passes through the scan mirror 25. The mirror 26 is reflected in the order (when copying an image, the mirror 23 is retracted to a position where it does not block the optical path of the printer system, and the scan mirror 25 is set at the A position and the Bib
It moves back and forth between the position and the position. ) and reaches the scan mirror 27. The light reflected by the scan mirror 27 (which reciprocates between the C position and the D position when copying an image) blocks incident light in the width direction of the photosensitive drum 28, which is a photosensitive member. Shutter block 29 (hereinafter referred to as
It's called a side shutter. ), is reflected by the mirror 30, and is projected onto the photosensitive drum 28 as a slit light. Note that there is a gap between the mirror 30 and the photosensitive drum 28, regardless of the degree of shading of the image on the microfilm 22.
An AE sensor 32 outputs an illuminance feedback signal to a device that adjusts the light intensity of the lamp 20 so that the illuminance of the light projected onto the photosensitive drum 28 is appropriate; 28 and a full shutter 31 that blocks light in the axial direction is provided.

During reading, when the image on the microfilm 22 is projected onto the screen 3, the scan mirror 25 is at position A, and the light emitted from the lens 2 is transmitted to the mirror 23 and the mirror 2.
4 and reaches the screen 3, and the image is projected onto the screen 3.

Also, when copying an image on the microfilm 22, first the mirror 23 is moved to the scanning mirror 25.
The scan mirror 25 and the scan mirror 27 are retracted to a position where they do not interfere with each other, are connected by a wire (not shown), and move synchronously with each other. and the scan mirror 27 moves from position C to position D.
AE photometry is performed by the AE sensor 32 during the forward movement of each position. Note that during this AE metering, mirror 2
6 swings multiple times in directions E and F in the figure to measure light over a wide range of image planes and improve measurement accuracy. During the backward movements in which the scan mirror 25 moves from the B position to the A position and the scan mirror 27 moves from the D position to the C position, the images scanned by these scan mirrors 25 and 27 are rotated in the G direction. The image is formed on the photosensitive drum 28, which is

Further, FIGS. 2 and 3 show detailed views of the side shutter 29 and all shutters 31 shown in FIG. 1.

As shown in FIG. 2, the side shutter 29 has an endless shutter 40 with a drive roller 41 and driven rollers 42A, 42B, 42C, and 42D.

42E, and the shutter 40 is moved by the rotation of a drive roller 41, which is connected to the drive roller 41 through a gear 43 and a gear 44. It is driven by a pulse motor 45. The original position of the shutter 40 is the position where the detection object 47 attached to the shutter 40 is detected by the photosensor 46, and the opening area of the opening 48 through which the light from the scan mirror 27 shown in FIG. 1 passes is , the pulse motor 45 is connected to the shutter 40
When the pulse motor 45 is rotated so that the shutter 40 moves in the H direction, it becomes smaller, and conversely, when the pulse motor 45 is rotated so that the shutter 40 moves in one direction, it becomes larger. By adjusting this opening area, the irradiation width of the light irradiated in a direction perpendicular to the axis of the photosensitive drum 28 can be adjusted. In other words,
The exposure width of the photosensitive drum 28 can be adjusted. By adjusting this exposure width, the image forming area of the original to be copied in the direction perpendicular to the paper passing direction is adjusted.

In addition, as shown in FIG. 3, all the shutters 31 are designed to rotate between a non-light-shielding position J and a light-shielding position, and when all the shutters 31 are in the light-shielding position K, the side shutters The light reflected by the mirror 30 through the opening 48 of 29 is prevented from being irradiated onto the photosensitive drum 28, thereby prohibiting exposure of the photosensitive drum 28.

Furthermore, when all the shutters 31 are in the non-shading position J,
Mirror 30 through opening 48 of side shutter 29
The light reflected by the photosensitive drum 28 is irradiated onto the photosensitive drum 28, and the photosensitive drum 28 is exposed to light. therefore,
By adjusting the operating time of all the shutters 31 (the time set at the light shielding position K), the image forming area of the original to be copied in the sheet feeding direction is adjusted. In other words, while all the shutters 31 are set to the light blocking position K,
Since the photosensitive drum 28 is not exposed, when copying,
Nothing will be printed in the area corresponding to this period.

Note that the slit width in the figure shows the slit width at which exposure is prohibited when all the shutters 31 are at the light-blocking position K.

Next, FIG. 4 shows a control block diagram of the image processing apparatus of the present invention. As shown in this figure, a CPU 50 that collectively manages all the controls of this image processing device includes a print key for instructing copying and a zoom key for adjusting the magnification of lens 2 as signal input elements that input signals to this CPU 50. etc., a paper select switch 51 that selects the cassette containing the paper to be used from among the paper stored in the cassettes 4A and 4B during copying, and a paper size switch that detects the paper size. Detection sensor 52 and AE for performing AE photometry
Sensor 32 and partial copy key 53 for setting the image forming area
are connected.

Further, as signal output elements for outputting signals from the CPU 50, LEDs 54 for displaying the work area, a photosensitive drum driving section 55 for driving the photosensitive drum 28, and all shutters 31 are provided on two vertical and horizontal sides around the screen 3 as signal output elements for outputting signals from the CPU 50. A full shutter drive unit 56 that drives the side shutters 29, a side shutter drive unit 57 that drives the side shutters 29, and an optical system drive unit 58 that drives each optical system are connected.

Connected to the CPU 50 are a ROM 59 that stores the operating program of the image processing device, and a RAM 60 that stores data output from the CPU 50 or the sensor.
Data regarding size frame erasing mode), mode 2 (A
4 vertical size frame erasing mode), data regarding mode 3 (A4 horizontal size frame erasing mode), and data regarding modes 4 to 6 (2 division mode) are stored.

Therefore, in the image processing apparatus of the present invention, the RAM 60 is used as a partial copy mode in which the image forming area is a partial mode.
This partial copier mode has the above six modes stored in the partial copy key 5.
Set by turning on 3.

Of the above-mentioned modes, modes 1 to 3 are for erasing the frame of standard sizes (A3, A4 vertical, A4 horizontal), and modes 4 to 6 are for erasing the image area by 2.
This is a mode for dividing.

Next, the main operations of the image processing apparatus of the present invention will be explained based on the main operation flowchart shown in FIG.

First, when the image processing device is powered on, the CPU 50
resets all operations and initializes the memory area, input/output ports, etc. (step 1). Next, C.P.
U50 sets the side shutter 29 shown in FIG.
(Step 2), the optical system is set to the reader state (the image on the microfilm 22 is projected onto the screen 3), and the lamp 20 is turned on (Step 3). Then, the CPU 50 inputs a signal from the partial copy key 53 disposed in the operation panel 6 shown in FIG.
One of the six partial copy modes stored in is selected, and an imaging area is set and its display processing is performed based on the data of the selected partial copy mode (step 4.5> , performs reader function processing, which is various necessary processing that must be performed during reader operation, such as adjusting the light intensity of the lamp 20 and determining the presence or absence of paper stored in the cassettes 4A and 4B (step 6).

Next, the CPU 50 uses various sensors not shown in FIG. A sensor inputs signals such as the operating state of the partial copy key 53 described above, and determines whether the copying device is ready for operation, in other words, whether it is in a print ready state, and if it is not in a print ready state. , repeat the processes from step 4 to step 7 until the print ready state is reached. Note that in this state, the indicator 5 shown in FIG.
B emits red light (step 7). If it is in the print ready state, the CPU 50 next presses the print key 50.
It is determined whether the print key 50 is turned on or not.
If the print key 50 is not turned on, the processes from step 4 to step 8 are repeated until the print key 50 is turned on (step 8). When the print key 50 is turned on, the CPU 50
The side shutter 2 is set based on the image forming area set in step 4 and the paper size used for copying.
9, the amount of movement of the shutter 40 from its original position, in other words, the set position is calculated. Based on this setting, the opening area of the opening 48 of the side shutter 29 is determined, and thereby the image forming area in the direction perpendicular to the paper passing direction is determined (step 9). Then, the CPU 50 calculates the operation timing and operation time of all the shutters 31 based on the scan start position corresponding to the image forming area set in step 4 and the paper size used for copying.

To operate all the shutters 31, four timers are used as described later, and in this step, the operating time of each of these timers is set. As a result, the image forming area in the paper passing direction is determined (step 10). Next, the shutter 40 is moved to this setting position based on the setting position of the shutter 40 calculated in step 9. However, if the shutter 40 is moved to the setting position at once, the shutter 40
0 blocks the light to the AE sensor 32 (
As shown in FIG. 1, since the AE sensor 32 is disposed at a position offset from the center position of the optical path, the shutter 40
Such a situation may occur depending on the setting position. )
In such a case, first, the shutter 40 should be replaced with the AE sensor 3.
Set 2 to the limit position that does not block it. However, shutter 4
Even if you move 0 to the set position at once, the shutter 40 will not move to A.
If the light to the E-sensor 32 is not blocked, this setting is performed at once (step 11).

Then, regardless of the degree of shading of the image on the microfilm 22 shown in FIG. It is done.

When this AE photometry is performed, the mirror 23 is retracted to a position where it does not interfere with the scan mirror 25, and the scan mirror 25 and the scan mirror 27, which are connected by a wire (not shown) and move in synchronization with each other, are
The scan mirror 25 moves synchronously in the A direction and the D direction, and the scan mirror 25 moves from the A position to the B position, and the scan mirror 27 moves from the A position to the C direction.
AE photometry is performed by the AE sensor height 32 during each forward movement from the position to the D position. In addition, during this AE photometry, the mirror 26 is oscillated multiple times in directions E and F in the figure, and the image plane is photometered from a wide range to improve measurement accuracy (step 12). Next, in step 11, the shutter 40, which has been temporarily put on standby at a position where it does not block the AE sensor 32, is moved to the position calculated in step 9.

Note that this step will not be executed if the shutter 40 is set to the set position all at once in step 11. The reason why the shutter 40 is moved in two steps as necessary is because it takes time to set the shutter 40, so the speed when copying is made as fast as possible. (
Step 13).

Next, the CPU 50 activates each timer to which the time calculated in step 10 is set at the same time as the start of scanning during copying, and based on the signal from the timer, all the shutters 31 are set to the non-shading state shown in FIG. It is set at position J and light shielding position K, and the exposure to the photosensitive drum 28 is controlled. An area that will not be copied is specified based on the operation timing and operation time (step 14). Then, a process for copying the image of the exposed area on the photosensitive drum 28, that is, an image forming process is performed (step 15), and multi-processing, that is, a predetermined number of copies set by the number key 5A is performed. Until this is done, the processes from step 14 to step 16 are repeated, and when a predetermined number of copies have been made, the process returns to step 2 and the above-described process is repeated again (step 16).

FIGS. 6A and 6B show a subroutine program for manual partial copy processing in step 4 in the main operation flowchart shown in FIG.

This subroutine program starts when the operator presses the partial copy key 53 provided inside the operation panel 6 shown in FIG. Data regarding a partial copy mode selected from among the six stored partial copy modes is input, and the copying device is thereby set to a partial copy state in which the imaging range is partial, and the partial copy flag is set to 1. When pressed again, this partial copy state is canceled and the partial copy flag becomes 0. The partial copy key 53 performs a toggle operation, and each time it is pressed, a partial copy state and a non-partial copy state are alternately set. This subroutine program will be explained below based on FIGS. 6(A) and 6(B).

First, the CPU 50 determines whether or not the partial copy flag is 1 (step 20). If the partial copy flag is 1, the CPU 50 determines the paper size stored in the cassettes 4A and 4B, as described later. Based on the signal from the paper size detection sensor 52 to be detected, the RAM 6
Among the six partial copy modes stored in 0,
Size signal processing is executed to automatically select data related to a predetermined partial copy mode and automatically set an image forming area based on the selected data. Whether or not to perform this size signal processing can be arbitrarily set as will be described later (step 21).

Then, the CPU 50 determines whether or not the partial copy key 53 is turned on (step 22). If the partial copy key 53 is turned on, the CPU 50 sets the partial copy flag to 0 and returns to the main flowchart. If the key 53 is not turned on, it is determined whether the setting flag is 1 (step 24), and the setting flag is 1.
If not, it is determined whether the number of copies has been cleared, that is, the number of copies has not been set using the number key 5A (step 25), and if the number of copies has been cleared, the next step is to It is determined whether the 0 key of the number keys 5A is turned on (step 26). If the numeric value is cleared in step 25 or the 0 key is not turned on in step 26, the process returns to the main flowchart. set the configuration flag to 1 (step 2)
7) Return to the main flowchart. When this setting flag becomes 1, the data related to the partial copy stored in the RAM 60 shown in FIG. 4 is set in a state where it can be rewritten.

If it is determined in step 24 that the setting flag is 1, then it is determined whether the clear key 5F disposed on the operation panel 5 is turned on (step 28), and the clear key 5F is turned on. If it is turned on, the setting flag is set to O (step 29) and the process returns to the main flowchart.

When this setting flag becomes 0, RAM6 shown in FIG.
The data related to the partial copy stored in 0 is set to an unrewritable state.

Note that the partial copy flag in this flowchart is a flag that determines whether the mode is partial copy mode or not, and the flag is set to 1 when executing partial copy or specifying an area in partial copy. . ,Also,
The setting flag is a flag that determines whether or not the copy area can be changed, and the partial copy flag is selected using the partial copy key 53, and the setting flag is selected using the 0 key among the numeric keys. ing. This O
The key is normally used to set the number of prints, but since this key is not pressed first when setting the number of prints, the partial copy key 53
is pressed, and when this 0 key is pressed in the setting number clear state, it is determined that the case is not for setting the number of prints but for changing the copy area.
'Next, in step 28, if it is determined that the clear key 5F is not turned on, it is determined whether the print key 50 is turned on (step 30), and if the print key 50 is turned on, the setting position is Data increment processing is performed (step 31). That is, by turning on the print key 50, the set position data is incremented by 1 each time the print key 50 is turned on, thereby changing the set position when setting the image forming area. For example, if the mode data called up by the X key (to be described later) is 1 to 3, in step 30
When 0 is turned on, the set position data is set to 1, and the 6th
As shown in Figure (C), the setting position 65 when setting the image forming area is specified, and when the print key 50 is turned on again, the setting position data is set to 2 and the setting position 66 is specified. Then, when the print key 50 is further turned on, the setting position data is set to 3 and the setting position 67 is designated. Similarly, when the mode data is 4 to 6, when the print key 50 is turned on in step 30, the setting position 65 for setting the image forming area is specified, as shown in FIG. 6(C). , when the print key 50 is turned on again, the setting position 66 is specified, when the print key 50 is turned on again, the setting position 68 is specified, and when the print key 50 is turned on next, the setting position 69 is specified. Then, when the print key 5C is turned on, the setting position 67 is designated next.

Next, the CPU 50 determines whether the currently called mode data is 1 to 3 (step 32).
If the currently called mode data is 1 to 3, it is determined whether the set position data is 4 (step 33); if the set position data is not 4, the process returns to the main flowchart. On the other hand, if the set position data is 4, the set position data is set to 1 (step 34), and the process returns to the main flowchart. That is, if the setting position 67 is specified before the print key 50 is turned on, the setting position 65 will be specified when the print key 50 is turned on next.

In step 32, if it is determined that the currently called mode data is not 1 to 3, then it is determined whether the set position data is 6, and the set position data is 6.
Otherwise, return to the main flowchart. On the other hand, if the set position data is 6, the set position data is set to 1 (step 36), and the process returns to the main flowchart. In this case, as in step 34, if the setting position 67 is specified before turning on the print key 50, the setting position 65 will be specified when the print key 50 is turned on next.

If it is determined in step 30 that the print key 50 is not on, then it is determined whether the X key is on. This X key is one of the number keys 5A.
This indicates that it is any key from 6 to 6 (step 37). Then, when the X key is turned on, the mode data corresponding to the number of the turned-on key is specified (step 38), and the CPU 50 stores the data stored in the work area of the RAM 60 at a predetermined location in the RAM 60. , the data of the X mode specified in step 38 is called from a predetermined location in the RAM 60 and stored in the work area, and the process returns to the main flowchart (steps 39 and 40>
.

In this case, as shown in FIG. 4, if number key 1 is turned on, mode 1 data is stored in the work area of RAM 60, and if number key 6 is turned on, mode 6 data is stored in the work area of RAM 60.
data will be stored in the work area of the RAM 60.

On the other hand, if the X key is not turned on in step 37, it is determined whether the focus key 5E is turned on, and if the focus key 5E is turned on, when changing the image forming area, the area is displayed. Perform setting shift processing (step 42), and press focus key 5.
The continuous on flag indicating the on state of E is set to 1 (step 43), and the process returns to the main flowchart. Further, if the focus key 5E is not turned on in step 41, the continuous on flag is set to 0 (step 44).
), return to the main flowchart.

If it is determined in step 20 that the partial copy flag is not 1, it is determined whether or not the partial copy key 53 is on (step 45). For example, the partial copy flag is set to 1 (step 46), and the process returns to the main flowchart.

In this way, when the partial copy key 53 is turned on and the 0 key is turned on with the number set to 0, the mode for setting the image area is maintained unless the clear key 5F is pressed.

When 1 to 6 of the number keys 5A are turned on, the mode data corresponding to the turned-on number is set, and the data stored in the work area of the RAM 60 is changed to the turned-on number. It will be rewritten to the corresponding mode data. Then, when the print key 50 is turned on, the set position data is sequentially incremented by 1 according to the number of times the print key 50 is turned on, and the set position when setting the image forming area is sequentially changed. In this case, if the mode data is 1 to 3, that is, if any of 1.2.3 of the number keys 5A is turned on, and the print key 5C is turned on, the setting position will be As shown in Figure 6 (C), 65.66.67.65.66,...
They are changed in the order of... In addition, when the mode data is 4 to 6, that is, 4.5. of the number keys 5A.
6 is turned on, when the print key 50 is turned on, its setting position changes as shown in Fig. 6 (
65.66.68.69.67.6 as shown in C)
5.66, . . . are cyclically changed. Then, when the focus key 5E is turned on with the setting position set, a setting shift process, which will be described later, is performed only while the focus key 5E is turned on.

Note that the copy areas from mode 1 to mode 3 are set by storing three position data at setting positions 65, 66, and 67 in predetermined locations of the RAM 60, and the data from modes 4 to 6 are set at setting positions 65. 66.67.68
．． It is set by storing five position data of 69 in a predetermined location of RAM60.

FIG. 7 shows a subroutine program for the setting shift process (step 42) in the flowchart shown in FIG. 6(B). This subroutine 10) will be explained below.

The CPU 50 determines whether the continuous flag, which determines whether the focus key 5E continues to be pressed, is 1, and if the continuous flag is not 1, the process proceeds to step 53 (step 50). If it is determined that the continuous flag is 1, a timer is activated to adjust the speed of movement of the lighting position of the display LED indicating the imaging area (step 51), and when this timer times up (step 52), the focus key is activated. It is determined whether or not 5E has been pressed to the up side (step 53). If it has been pressed to the up side, the image area data is shifted by one position to the right (step 54), and the process returns to the main flowchart. On the other hand, if the focus key 5E is not pressed to the up side, then it is determined whether the focus key 5E is pressed to the down side (step 55), and if it is not pressed to the down side, the process returns to the main flowchart. If it is pressed down, the image area data is shifted to the left by one position (step 56), and the process returns to the main flowchart.

The above operation will be explained with reference to FIG. 6(C). As mentioned above, when the print key 50 is turned on, the setting position data is sequentially incremented by 1 according to the number of times the print key 50 is turned on, and the image forming The setting position when setting the area is changed sequentially. For example, if you set the setting position 65 with the print key 5C and press the focus key 5E upward in this state, this imaging area will be changed every time the timer times up. When the focus key 5E is pressed down, the imaging area moves in the direction M in the figure each time the timer times up. , that is, the image area data will be shifted to the left. Also, if you set the print key 50 to the setting position 67 and press the focus key 5E upward in this state, this image area will be shifted every time the timer times up. Move in the N direction in the same figure, while focus key 5
When E is pressed upward, this image forming area will move in the 0 direction in the figure every time the timer times up. Note that by adjusting the on time of the timer in step 51, the moving speed of the LED that displays the image forming area can be adjusted.

FIG. 8 shows a subroutine program for size signal processing in step 21 of the flowchart shown in FIG. 6(A). This subroutine program will be explained below.

First, as a premise for this explanation, a paper selection switch and its selection method will be explained.

A switch is provided in the operation panel 6 to select the cassette 4A or 4B containing paper of different sizes when copying, and the operator can select the size of the paper to be copied by operating this switch. It looks like this. Also, in the operation panel 6, when the cassette is inserted into the copying machine, a paper size detection sensor 52 detects the paper size stored in the cassette, and the operator presses the switch to detect the paper size. A synchronization switch is also provided that automatically switches the mode to select the paper stored in the replaced cassette without having to select it, and the operator can use this synchronization switch to set the method for selecting one of these papers. It has become.

When the synchronization switch described above is turned on, the size synchronization flag is set to 1, and the CPU 50 determines whether or not this size synchronization flag is 1 (step 60).
If the size synchronization flag is not 1, that is, the synchronization switch is not turned on and the operator selects the paper size to copy by operating the paper selection switch, the main Returning to the flowchart, if the size synchronization flag is 1, then it is determined based on the signal from the paper size detection sensor 52 whether there is a signal for size change due to cassette replacement, etc. (step 61). If there is no size change signal, the process returns to the main flowchart, and if there is a size change signal, it is determined whether this size change signal is a modified size of A3 (for example, check size) (step 62), and this signal is If it is a modified size of A3, the mode data is set to 4, that is, as explained in the above-mentioned partial copy manual processing routine, the CPU 50 uses the RAM
Data regarding partial copying in mode 4, which is arbitrarily set to be divided into two from a predetermined location in RAM 60.60, is stored in RAM 60. Step 63), Step 69
If this signal is not a modified size of A3, then it is determined whether this signal is of A3 size (
Step 64). If this signal is A3 size, the mode data is set to 1, that is, the CPU 50
The process proceeds to step 65) and step 69 to prepare for transferring the data regarding the partial copy in mode 1 from the predetermined location of 60 to the work area of RAM 60. If this signal is not A3 size, next, this signal is A4 vertical size. It is determined whether or not (step 66). If this signal is A4 vertical size, the mode data is set to 2, that is, the CPU 50 prepares to transfer the data regarding the partial copy of mode 2 from the predetermined location of the RAM 60 to the work area of the RAM 60 (step 67); Proceeding to step 69, if this signal is not A4 vertical size, the mode data is set to 3, that is, the CPU 50
Step 68) prepares to transfer the data related to mode 3 partial copy from the predetermined location of M60 to the work area of RAM 60, and the process proceeds to step 69. Then, when the mode data is set as described above, the CPU 50
Step 69) to store the mode data stored in the work area of the AM 60 in a predetermined address of the RAM 60;
The mode data selected in each step described above is taken out from the RAM 60 and stored in the work area of the RAM 60, and the mode data is rewritten (step 70).
.

In this way, if you turn on the synchronization switch mentioned above,
If the cassette is replaced, the copy paper size is automatically set and the mode data set corresponding to that size is automatically changed, and the operator simply presses the print key 50 to select the desired size. The microfilm image can be copied onto paper with the desired image area. Note that a dip switch may be used as the above-mentioned synchronous switch, or another switch may be used.

Furthermore, in this flowchart, A3 size is the imaging area for mode 1, A4 vertical size is the imaging area for mode 2, A4 horizontal size is the imaging area for mode 3, and A3 modified size is the imaging area for mode 4. Although this example shows the setting, this correspondence may also be selected by another deep switch, or may be set by software, so that the operator can easily operate these switches, etc. This allows this association to be set arbitrarily.

Next, FIG. 9 shows a subroutine program for partial copy display processing of the main flowchart shown in FIG. 5. Note that this flowchart is a flowchart for lighting up the LEDs arranged around the screen 3 on two vertical and horizontal sides.

This flowchart will be explained below.

As described above, when the partial copy key 53 is pressed, the partial copy flag becomes 1. First, the CPU 50 determines whether the partial copy flag is 1 (step 80), and if the partial copy flag is 1, then the CPU 50 determines whether the partial copy flag is 1 or not. If not, CPU50
does not operate the optical system drive unit 58, turns off all the LEDs arranged around the screen 3 on two vertical and horizontal sides and which display the image forming area (step 81), and returns to the main flowchart.

On the other hand, if the partial copy flag is 1, the CPU 50 operates the optical system drive section 58 to light up the LED in the portion indicating the image forming area (step 82), and it is determined whether the setting flag is 1 or not. It is done. This configuration flag is
As described above, the value becomes 1 when the 0 key is turned on and the image forming area is set in a state where the settings can be changed (step 83). If the setting flag is not 1, return to the main flowchart and set the setting flag to 1.
In other words, when the image forming area can be reset, the LED corresponding to the setting position shown in FIG. 6(C) is blinked to prompt the operator to set the imaging area. The coordinates of the set position are notified (step 84).

That is, if set to partial copy mode,
The LED indicating the imaging area will light up, and if the mode is set to change the settings of the imaging area, the LED indicating the setting position when setting the imaging area will blink. Become.

The series of operations shown in the flowcharts shown in FIGS. 6 to 9 described above will be explained more briefly with reference to FIGS. 10 to 14.

As shown in FIG. 10, approximately one LED 70 is installed on two vertical and horizontal sides around the screen 3 so that the image forming area can be visually observed.
They are arranged at intervals of 0111m, and this lit L
The intersection range of the vertical direction and the horizontal direction of the ED 70 represents an image forming area (an area where copying can be performed). For example, in FIG. 10, the image forming area in the horizontal direction range 2, 3.4 and the vertical direction range 7 when the DE 70 is lit is the area indicated by diagonal lines in the figure.

When the partial copy key 53 is turned on, the partial copy state is set, but when the partial copy state is set,
When size signal processing is performed, and there is no request for size change in this process, and the 0 key is pressed in the numeric clear state, the imaging area becomes changeable, and in this state, the numeric key 5C is pressed. When pressed, the mode data regarding the partial copy corresponding to this numeric key 5C is stored in the RAM 60.
is input to the work area of RAM 60 from the specified location,
LE at the position indicating the imaging area based on this mode data
D70 lights up. For example, if the 1 key of the number key 5C is pressed and mode 1 data is input into the work area of the RAM 60, then the horizontal direction 1, 2 shown in FIG.
, 3, 4.5 range and vertical range of 6.7.8 LEDs
70 lights up and an A3 image forming area is displayed. Also, when the 2 key of the numeric key 5C is pressed, this time the RAM 60
The data of mode 2 is input into the work area of
The LEDs 70 in the range of 4.5 in the horizontal direction and 6.7.8 in the vertical direction shown in the figure light up, and the A4 vertical image forming area is displayed as shown in FIG. When the key is pressed, mode 3 data is input to the work area of the RAM 60, and the LEDs 70 in the horizontal range 2.3.4 and the vertical range 7 shown in Fig. 10 light up. An A4 horizontal image forming area corresponding to the shaded area shown is displayed.

Also, if you press the 6 key of the numeric key 5C, the RA
Mode 6 data is input to the work area of M60,
Since the copy area is divided into two in this mode 6 data, as shown in FIG. 12, the LEDs 70 at the positions indicating the two image forming areas are lit, which corresponds to the shaded area shown in the figure. Two image forming areas are displayed.

When the print key 50 is pressed while the mode is set from mode 1 to mode 3, the mode changes to a mode for changing the image forming area.In this mode, as shown in FIG. L indicating the setting position when setting the area
ED70A flashes and toggles focus key 5
If you keep pressing E to the right, the LED 70 will light up in the right direction (
When the focus key 5E is moved to the left side (a direction in FIG.
When the focus key 5E is turned off, the movement of the lighting stops and the imaging area is set. Next, when the print key 50 is pressed, the LED 70B indicating the setting position described above flashes, and when the focus key 5E, which toggles, is continued to be pressed to the right in the same way as described above, the LED 70 lights up in the right direction ( a direction in Fig. 13) and keep pressing the focus key 5E to the left.
The lighting of D70 moves to the left (in the direction shown in Fig. 13),
When the focus key 5E is turned off, the area stops increasing. And this LED70A and LED 7 OB Sono L
When the ED lights up, this LED70A and LED7
The range corresponding to the width of 0B is set as the horizontal imaging range.

Furthermore, when the print key 50 is pressed, the LED 70C indicating the setting position described above flashes, and as described above, when the focus key 5E, which toggles, is continued to be pressed to the right,
The lighting of the LED 70 is in the direction of expanding the area (e in Fig. 13,
f direction), the image forming area increases in the vertical direction, and if the focus key 5E is kept pressed to the left, the lighting of the LED 70 moves towards the center of the screen 3 (g direction in Fig. 13), and the image forming area increases. When the area decreases and the focus key 5E is turned off, the area stops increasing or decreasing. In other words, the setting of the image forming area in the vertical direction is performed by central distribution. Then, when the print key 50 is pressed again, the LED
70A lights up, and the mode returns to the mode for changing the setting of the horizontal imaging area.

By performing the above operations, the image forming area can be set arbitrarily. Also, when setting an image forming area divided into two, set the horizontal image forming area to two.
Settings can be made by repeating the same operations as above.

Next, the side shutter position calculation subroutine program shown in FIG. 14(A) will be explained.

(This subroutine program is executed at step 9 in Fig. 5.
This is shown in . ) When the partial copy key 53 is pressed, the partial copy flag becomes 1, but first, the CPU 50 determines whether the partial copy flag is 1 (step 90), and if the partial copy flag is not 1, the selection is made. It is determined whether the area of the copied copy corresponds to A4 horizontal size (step 95), and
If it is the horizontal size, calculate the number of pulses d to be applied to the pulse motor 45 that drives the shutter 40 by calculating a・α and return to the main flowchart (step 96); if it is not the A4 horizontal size, d is set to O and returns to the main flowchart (step 97).

On the other hand, if it is determined in step 90 that the partial copy flag is 1, the selected copy area is A.
It is determined whether the size corresponds to A4 horizontal size (step 91>, and if it is A4 horizontal size, the 14th horizontal size
As shown in the figure, y<a (y represents the distance to the end of the imaging area set in the flowchart of FIG. 7).

Note that the image forming area in this case is displayed based on data transferred to the work area of the RAM 60.

), step 92>, y<a
If so, set the value of a to y (Step 93), calculate the number of pulses d to be applied to the pulse motor 45 that drives the shutter 40 by calculating C·(y+b), and return to the main flowchart ( Step 94) If it is determined in Step 91 that the size is not A4 horizontal size, or if it is determined in Step 92 that y<a is not true, the process proceeds to Step 94, and a pulse is applied to the pulse motor 45 that drives the shutter 40. The number d, C.
(y+b) is calculated and the process returns to the main flowchart.

In other words, in this subroutine, the side shutter 29
In order to set the shutter 40 at a position corresponding to the set image forming area, the number of pulses to be applied to the pulse motor 45 is calculated.

Then, when this calculated pulse is applied to the pulse motor 45, the shutter 40 is set at a predetermined position,
The opening area of the opening 48 is adjusted according to its setting position. As a result, the irradiation width of the light irradiated in a direction perpendicular to the axis of the photosensitive drum 28 shown in FIG. 1 is adjusted. In other words, the exposure width of the photosensitive drum 28 is adjusted. Therefore, the image forming area of the copied document in the direction perpendicular to the paper feeding direction is adjusted. In addition, Fig. 14 (
The distance b shown in A) indicates the distance layer between the original position of the shutter 40 in the side shutter 29 and the paper passing position of 83, and in this way, the distance between the original position of the side shutter 40 and the paper passing position of 3 sizes. The reason why it is placed outside the image forming area is to prevent the image forming range from being affected even if a positional error occurs in the optical system.

Next, the entire shutter processing subroutine program shown in FIG. 15 will be explained.

(This subroutine program is shown in step 1 in Figure 5.
0. ) When the partial copy key 53 is pressed, the partial copy flag becomes 1.
However, first, the CPU 50 sets the partial copy flag to 1.
If the partial copy flag is not 1, the process returns to the main flowchart, and if the partial copy flag is 1, then it is determined whether all shutter flags are 1. Let's do it. This total shutter flag is set to 1 when an image is to be copied, and is set to 0 when an image is not to be copied (step 101). If all shutter flags are not 1, the process proceeds to step 103, and if all shutter flags are 1, all shutters 31 are turned on (set to non-shading position J shown in FIG. 3) (step 102), and image formation is started. Takado or not.

In other words, it is determined whether copying has started (step 103), and if image creation has not started, wait until image creation has started, and once image creation has started, a timer is set to set the operation timing and operation time of all shutters 31. is started (step 104). Then, all the shutters 31 are driven by the signal from this timer (step 105), and then it is determined whether the image creation is completed, that is, whether the copying is completed or not (step 106).
, if the image creation has not finished, wait until the image creation is finished,
When the image formation is completed, all the shutters 31 are turned off (set to the light shielding position K shown in FIG. 3) (step 107).

As described above, in this subroutine, the set imaging area and
The operation of all shutters 31 is controlled based on the relationship between the paper size to be copied and the projection position on the screen.

FIG. 16 shows a subroutine program for starting the timer in step 104 in the all-shutter processing subroutine program shown in FIG. 15. Timer T1~ used in this subroutine
The setting time of T4 is determined based on the scan start position corresponding to the image forming area and the paper size used for copying set in step 4 of the flowchart shown in FIG. ), this timer T1~
T4 operates as follows. Note that this flowchart is a flowchart that determines the start of each timer T1 to T4.

If time is set in each timer T1 to T4, t
Since the 1 data, t2 data, t3 data, and t4 data are all not 0, timers T1 to T4 are turned on all at once (steps 110 to 117). For example, if the set time of timer T2 and timer T3 is 0, the t2 data,
The t3 data is also 0, and in this case, when this flowchart starts, the t1 data is not 0, so the timer T1 is turned on (steps 110 and 111), and then the t
2 data and t3 data are 0, timer T2 and timer T3 are not turned on (steps 112, 114>
, since t4 data is not 0, turn on timer T4 (
Steps 116.117). In addition, these timers T
The data set in 1 to T4 have a relationship of t1 data<t2 data<t3 data<t4 data. Furthermore, the t1 to t4 data indicating the timer values of the timers T1 to T4 are calculated based on the set copy area and paper size by the total shutter timing calculation routine shown in FIGS. 18(A) to (D), which will be described later. Calculated.

Next, FIG. 17 shows step 105 shown in FIG.
This is a subroutine program for driving all shutters.

First, the CPU 50 determines whether or not the timer T1 is on (step 120); if it is not on, the process proceeds to step 123; if it is on, the CPU 50 determines whether or not the timer T1 has timed up (step 121);
If the time-up has not occurred, all shutters 31 are turned off based on the time-up. That is, all the shutters 31 are set to the light blocking position K (step 122). Next, step 12 determines whether the timer 72 is turned on.
3>, if it is not on, the process proceeds to step 126; if it is on, it is determined whether or not the timer T2 has timed up; step 124>; if the timer T2 has not timed up, all shutters 31 are turned on as soon as the timer has timed up.

In other words, all the shutters 31 are set to the non-shading position J (
Step 122). Then, it is determined whether or not the timer T3 is on (step 126), and if it is not on, the process proceeds to step 129; if it is on, it is determined whether or not the timer T3 has timed up (step 127).
>, if the time-up has not occurred, wait for the time-up and turn off all shutters 31. In other words, all shutters 3
1 is set as the light shielding position K (step 128). Further, it is determined whether the timer T4 is on or not (Step 129), and if it is not on, the process returns to the main flowchart, and if it is on, it is determined whether or not the timer T4 has timed up (Step 130). After waiting for time-up, all shutters 31 are turned on. That is, all the shutters 31 are set to the non-light blocking position J (step 131).

By performing the above processing, all the shutters 31 are set to the non-shading position J until the timer T1 times up, and are set to the light shielding position K after the timer T1 times up until the timer T2 times up,
It is set to the non-shading position J from the time the timer T2 times up until the timer T3 times up, and it is set to the light shielding position K from the time the timer T3 times up until the timer T4 times up, and when the timer T4 times up, the light shielding position J is set. will be set to .

Therefore, the photosensitive drum 28 is exposed to light while the timer T1 times up, after the timer T2 times up and until the timer T3 times up, and after the timer T4 times up.

Next, FIGS. 18(A) to 18(0) show a subroutine program for calculating the total shutter timing shown in step 10 in FIG. This flowchart is for calculating the time set in timer T1 to timer T4 shown in the timer start routine shown in FIG. 16, and based on this calculated value, the operation timing and operation time of all shutters are calculated. is determined. Please note that the paper size used for copying is A3.
, A4 vertical, A4 horizontal, and the alignment of this paper is as follows.
Centering is done so that the center of the screen is aligned with the center of the paper.

When this program starts, it first determines whether the paper size used for copying is A3 (
In step 140), if it is A3, it is determined whether nl<xi<ml. Here, Fig. 18 (
E) As shown, nl is the scan start position during copying (timer T1 to timer T4 shown in the timer start routine start from the time the paper passes this position), and this value is 0. It is. Further, Xl is the distance the paper is sent from the position of n1=0 until the photosensitive drum 28 is exposed, and ml is the width of the paper. That is, in this step, it is determined whether the set copy area is within the area of the paper to be used (step 141).

As a result of this judgment, if nl<xi<ml, that is, the set image forming area is used, and if it is not within the paper area, t1 data is set to O (step 143), nl<xi
If xi<ml, k(xi+1) is calculated and this value is set as t1 data in step 142>, and this value is set in timer T1.

Note that here, l is a distance set to allow stable travel within the image forming range.

Next, a determination is made whether nl<x2<ml. Here, as shown in FIG. 18 ([), X2 is n
This is the distance that the paper is fed from the position of 1=0 until the exposure of the photosensitive drum 28 is cut off, and ml is the width of the paper. That is, in this step, as described above, it is determined whether the set image forming area is within the area of the paper to be used (step 144). As a result of this judgment,
If nl<x2<ml, that is, if the set image forming area is not within the paper area to be used, set t2 data to 0 (step 146); if nl<x2<ml, k(x2+1 ) and set this value as t2 data (step 145), and set this value in timer T2.

Then, it is determined whether nl<x3<ml. Here, as shown in FIG. 18(E), X3 is
This is the distance the paper is fed from the position of n1=0 until the photosensitive drum 28 is exposed, and ml is the width of the paper. That is, in this step: As described above, it is determined whether the set image forming area is within the area of the paper to be used (step 147).

As a result of this judgment, if nl<x3<ml, that is, if the set image forming area is not within the area of the paper to be used, the t3 data is set to 0, step 149>, nl<x
If 3<ml, calculate k (x3+1), use this value as t3 data (step 148), and set this value in timer T3.

Next, a determination is made whether nl<xi<ml. Here, as shown in FIG. 18(E), xi is n
This is the distance that the paper is fed from the position of 1=0 until the exposure of the photosensitive drum 28 is cut off, and ml is the width of the paper. That is, in this step, as described above, it is determined whether the set image forming area is within the area of the paper to be used (step 150). As a result of this judgment,
If nl<xi<ml, that is, if the set image forming area is within the area of the paper to be used, then set the 4 data to 0 (step 152), and if nl<xi<ml, then k ( x4+1> is calculated, this value is set as t4 data (step 151), and this value is set in timer T4.

Next, if it is determined in step 140 that the paper size is not A3 size, the process proceeds to the flowchart shown in FIG. 153), A
If it is 4 vertically, it is determined whether n2<xi<m2.

Here, as shown in FIG. 18(E), n2 is the scanning start position during copying (from the time the paper passes this position, timers T1 to T4 shown in the timer start routine are activated). And also,
Xl is the distance the paper is sent from the position of n1=0 until the photosensitive drum 28 is exposed, and m2 is the width of the paper. That is, in this step, it is determined whether the set image forming area is within the area of the paper to be used (step 154). As a result of this judgment, n2<xi<m
If it is not 2, that is, if the set image forming area is not within the area of the paper to be used, the t1 data is set to 0 (step 156), and if n2<xf<m2, k(xl+1
＞ and set this value as t1 data in step 155.
), and set this value in timer T1. Next, n2<x
A determination is made whether 2<m2. here,
As shown in FIG. 18(E), X2 is the distance the paper is sent from the position where n1=0 until the exposure of the photosensitive drum 28 is interrupted. That is, in this step, as described above, it is determined whether the set image forming area is within the area of the paper to be used (step 157). As a result of this judgment, if n2<x2<m2, that is, if the set image forming area is not within the area of the paper to be used, t2 data is set to 0 (step 159), n2
If <x2<m2, k (x2+1) is calculated and this value is set as t2 data (step 158), and this value is set in timer T2. Then, it is determined whether n2<x3<m2. Here, in Figure 18 (E
), x3 is the distance by which the paper is fed from the position n1=0 until the photosensitive drum 28 is exposed. That is, in this step, as described above, it is determined whether the set image forming area is within the area of the paper to be used (step 160). As a result of this judgment,
If n2<x3<m2, that is, if the set image forming area is not within the area of the paper to be used, t3 data is set to 0 (step 162), and if n2<x3<m2, k(x3+1 > is calculated and this value is set as t3 data (step 161), and this value is set in timer T3.

Next, a determination is made whether n2<xi<m2. Here, as shown in FIG. 18(E), X4 is n
1=This is the distance the paper is fed from the 0 position until the exposure of the photosensitive drum 28 is cut off. That is, in this step,
As described above, it is determined whether the set image forming area is within the area of the paper to be used (step 163). As a result of this judgment, n2<x4<m2
If not, that is, if the set image forming area is not within the area of the paper to be used, t4 data is set to O (step 165), and if n2<x4<m2, k(x4+1>
Calculate and use this value as t4 data (Step 164)
, this value is set in timer T4.

Next, the process proceeds to the flowchart shown in FIG. 18(C), and it is determined whether n3<xi<m3. Here, as shown in FIG. 18(E), n3 is the scan start position during copying (timer T1 to timer T4 shown in the timer start routine start from the time the paper passes this position). In addition, Xl is the distance to feed the paper from the position of n1=0 until the photosensitive drum 28 is exposed, and m3 is the width of the paper. That is, in this step, it is determined whether the set image forming area is within the area of the paper to be used (step 166). As a result of this judgment, n3<xi<
If it is not m3, that is, if the set image forming area is not within the area of the paper to be used, the t1 data is set to 0 (step 168), and if n3<xi<m3, ゛, k(xl
+1> and use this value as t1 data Step 1
67), and sets this value to timer T1. Next, n3
A determination is made whether <x2<m3.

Here, as shown in FIG. 18(E), X2 is n1=0
This is the distance the paper is fed from the position until the exposure of the photosensitive drum 28 is cut off. That is, in this step, as described above, it is determined whether the set image forming area is within the area of the paper to be used (step 169).
). As a result of this judgment, if n3<x2<m3, that is, if the set image forming area is not within the area of the paper to be used, the t2 data is set to 0 (step 171), n3
If <x2<m3, k(x2+1> is calculated and this value is set as t2 data at step 170), and this value is set in timer T2. Then, it is determined whether n3<x3<m3.

Here, as shown in FIG. 18(E), x3 is n1=0
This is the distance the paper is fed from the position until the photosensitive drum 28 is exposed. That is, in this step, as described above, it is determined whether the set image forming area is within the area of the paper to be used (step 172).
. As a result of this judgment, if n3 <
If x 3 <m 3, calculate k (x3+1 >, set this value as t3 data (step 173), and set this value in timer T3. Next, n3<x4×m3
A judgment is made as to whether or not. Here, as shown in FIG. 18(E), X4 is the distance the paper is sent from the position n=0 until the exposure of the photosensitive drum 28 is interrupted.

That is, in this step, it is determined whether or not the set image forming area is within the area of the sheet to be used (step 175). As a result of this judgment, if n3<x4<m3, that is, if the set image forming area is not within the area of the paper to be used, t4 data is set to 0 (step 177), and if n3<x4<m3. For example, calculate k(x4+1>, set this value as t4 data, step 176>, and set this value to timer T4.Next, proceed to the flowchart of FIG. 18(D), and copy from the leading edge of the paper. If it is necessary to copy from the leading edge, set all shutter flags to O (Step 179).
, if there is no need to copy from the tip, set all shutter flags to 1 and return to the main flowchart (
Step 180). .

Next, in FIG. 19, A of step 12 in FIG.
A subroutine program for E photometry is shown. This AE
As mentioned above, in photometry, the measurement accuracy is improved by swinging the mirror 26 so as to measure the light over a wide range of the image plane of the microfilm 22. This is because, as shown in FIG. 19(B), the image can be scanned in a sinusoidal manner, and the accuracy of photometry can be improved accordingly. The amount of light at each point detected by the AE sensor 32 is A/D converted and stored in the RAM 60.
The PU 50 calculates the optimum light amount of the lamp 20 based on these data. Then, the CPU 50 adjusts the applied voltage so that the lamp 20 emits the calculated amount of light, thereby always copying at the optimum density regardless of the degree of shading of the image.

This flowchart will be explained below.

First, the CPU 50 determines whether ySy (t)≦cy. Here, the locus during AE photometry can be expressed as a function of time t as follows from the diagram shown at the bottom of Figure 19: x(t) = ml-αt y(t) = sin αt+c/2 Ru.

As shown in the figure, the set image forming areas are yS-C-y, X1 to X2. Assuming that the range is from X3 to X4, in this step it is determined whether the currently scanned position is within the imaging area in the X direction. As a result of this judgment, if ySy (t)≦C-y, proceed to the next step, and if ySy (t)≦C-y, proceed to step 194 (step 190).Next, the CPU 50 It is determined whether X1≦x(1)≦x2. In other words, the current scanning position is
It is determined whether it is within the imaging area in the X direction. As a result of this judgment, if X1≦x (t)≦x2, the process proceeds to the next step, and if X1≦x (t)≦x2, the process proceeds to step 193 (step 191). Then, the CPU 50 further determines whether or not X3≦X([)≦X4. In other words, the current scanning position is
It is determined whether it is within the imaging area in the X direction. As a result of this judgment, if X3≦x (t)≦X4, the process proceeds to the next step, and if X3≦X([)≦X4, the process proceeds to step 194 (step 192). CPU50 is
The amount of light detected by the AE sensor 32 is A/D converted and stored in the RAM 60. This step will be executed when scanning is being performed in the image forming area (shaded area) in the figure (step 193). Next, it is determined whether photometry has been completed for the entire area of the object to be photometered (step 194>; if it has not been completed, the process returns to step 190, and the processing of the above steps is performed. Once completed, the CPU 50 Retrieving data related to photometry of only the image forming area obtained by the photometry from the RAM 50,
The optimum light amount of the lamp 20 is calculated. That is, the exposure amount is determined (step 195).

In this way, by performing AE metering only on the image forming area, even if only the image forming area has a different contrast from the surrounding area, accurate AE metering will be possible, and copies will also be made at the optimum density. can do.

Note that in this flowchart, photometric data for areas other than the imaging area is not collected, so the number of sampling data is reduced when compared with normal photometric data.In order to avoid this, mirror 2
The swinging angle of the mirror 6 may be changed in conjunction with the imaging area to prevent the number of data from decreasing, or the swinging speed of the mirror 26 may be changed in conjunction with the imaging area. The number of data may be prevented from decreasing.

Furthermore, in this flowchart, photometric data for areas other than the image forming area is not taken, but when performing AE photometry as usual and taking the same photometric data as usual, when performing calculations to determine the exposure amount. The data of only the image forming area may be selected and the exposure amount may be determined based on the data.

As is clear from the above explanation, according to the present invention, the exposure prevention means prevents exposure of areas other than the partial exposure area of the photoreceptor set by the setting means. , it is possible to copy only the designated area, and it is possible to prevent not only black frames but also black bands from occurring in the original document obtained by copying.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of the optical path system of the image processing device according to the present invention, FIG. 2 is a detailed diagram of the side shutter of the image processing device according to the present invention, and FIG. 3 is the image processing device according to the present invention. Figure 4 is a control block diagram of the image processing apparatus according to the present invention; Figure 5 is a main operation flowchart of the image processing apparatus according to the present invention; Figure 6 (^) , CB) is a subroutine flowchart showing partial copy manual processing of the main operation flowchart shown in FIG. 5, and FIG. 6(C) is an operation explanation of the operation flowchart shown in FIGS. 6(A) and (B). 7 is a subroutine flowchart showing the setting shift processing of the subroutine flowchart shown in FIG. 6; FIG. 8 is a subroutine flowchart showing the size signal processing of the subroutine flowchart shown in FIG. 6; 10 is a subroutine flowchart showing a partial copy display process of the main operation flowchart shown in FIG. 5. FIGS. 14(A) is a subroutine flowchart showing side shutter position calculation in the main operation flowchart shown in FIG. 5, and FIG. 14(B) is a diagram for explaining the operation of the flowchart shown in FIG. 14(A). , FIG. 15 is a subroutine flowchart showing all shutter processing of the main operation flowchart shown in FIG. 5, FIG. 16 is a subroutine flowchart showing timer start of the subroutine flowchart shown in FIG. 15, and FIG. A subroutine flowchart showing all shutter driving in the subroutine flowchart shown in FIG. 15. FIGS. Figure (E) shows the 18th
19(A) is a subroutine flowchart showing the AE photometry of the main operation flowchart shown in FIG. 5. FIG. 19(B) 20 is an external view of a general image processing device, and FIG. 21 is an operation diagram of the image processing device shown in FIG. 20. A detailed view of the board, FIG. 22, is a diagram for explaining the problems of the conventional method. 5... Operation panel (setting means), 20... Lamp, 22... Microfilm (information recording medium), 28...
...Photosensitive drum (photoreceptor), 32...All shutters (exposure prevention means), 50...
CPU (exposure prevention means). The purity of the drawing? (No 1 change in S) Figure 1 Figure 6 (C) Figure 10 Figure 18 (D) Figure (E) n1!0 Figure 1 (B) Figure 22 Procedural Amendment (C) 1. Indication: 1988 Patent Application No. 261.317 3, Name of the person making the amendment: Minolta Camera Co., Ltd. Ii Kamo Akira Hideo Tajima 4, I 4 Koto L^, No change).

Claims (2)

[Claims] (1) In an image processing device that copies an image recorded on an information recording medium by scanning an image on an information recording medium and exposing a photoreceptor to image light, the partial exposure area of the photoreceptor is An image processing apparatus comprising: a setting means for setting; and an exposure blocking means for blocking the exposure a plurality of times based on a signal from the setting means during image exposure on the photoreceptor. (2) The exposure blocking means is actuated multiple times during the exposure of the photoreceptor by signals from a plurality of timers whose times are set based on the partial exposure area set by the setting means. An image processing device characterized by: