JPS6232765A - Copying machine - Google Patents

Abstract

PURPOSE:To obtain a printed image of high resolution and high picture quality by providing a glass plate between a photoelectric conversion means and an object, moving the glass plate and alternately image-forming the optical image of the object that is dislocated at the sensor part of the photoelectric conversion means. CONSTITUTION:An incident ray of light 1 from the object is irradiated on the sensor part of a solid-state image pickup element 4 through a glass plate part 2 and an optical system 3, the optical image of the object being image-formed on the sensor part. And a picture signal is generated corresponding to the optical image, and after it is processed at a signal process circuit 6, the signal is digitized at an A/D converter 7, being stored at a memory 8. At such a time, the glass plate part 2 is equipped with a parallel and flat glass plate 14 and the glass plate 14 is oscillated with a period setting one frame scanning period of the solid-state image pickup element 4 as 1/2 period. Thereby, the incident ray of light 1 is refracted by the glass plate 14 and the position of the optical image at the sensor part 15 of the solid-state image pickup element 4 is displaced by DELTAX, improving the resolution.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention is directed to a copying apparatus that uses a photoelectric conversion means such as a solid-state image sensor as an image input means, and is capable of obtaining printed images of still images such as photographs and paintings. Regarding equipment.

[Background of the invention]

In order to copy high-resolution, high-quality original images such as photographs and paintings, it is necessary to have an image input means that can faithfully read the original image, and to print faithfully to the high-resolution image signal obtained from this image input means. A printer unit that performs this is required. Among these, high resolution and high image quality of the printer section have already been realized, but there is still room for development in high resolution of the image input means. For example, conventional image reading devices used in facsimile machines, etc.
As disclosed in Japanese Patent No. 104178, improvements have been made by using a line sensor consisting of a CCD (i-charge coupled device) as a substitute for conventional phototubes, image tubes, etc.; This was done with a focus on speeding up processing.

Regarding higher resolution, efforts are being made to reduce the size of the CCD element in the line sensor and arrange more CCDT elements in a higher density.However, if the original image is a photograph or painting, etc. It is necessary to have the ability to enlarge or reduce the original image and copy it, such as enlarging and copying a specific part. Moreover, in such cases, before copying, the enlargement ratio, lli! It is important to be able to monitor the original image so that you can check the placement of the small skewers or printed images. However, with the original image reading method using the line sensor described above, it is very difficult to monitor the original image to be cohesed.

Furthermore, when reading an original image using such a line sensor, it is necessary to move the original image or the line sensor, and there is an essential problem that a highly accurate mechanism is required for this purpose.

On the other hand, there is a known technology for capturing images using solid-state image sensors used in video cameras (for example, Japanese Patent Publication No. 55-24748). Similar to the method,
Since the original image can be read in real time, it is easy to check the image on the monitor. However, current solid-state image sensors have a very low resolution of around 300 lines, and do not have the performance to make full use of the resolution in the printer section. Moreover, solid-state image sensors are constructed on silicon wafers. %MW of a semiconductor, and even if an attempt is made to increase the resolution by increasing the chip size, there is a limit to this due to the relationship between the chip size and the yield. Also,
It is conceivable to make the individual light-receiving elements in the sensor section (light-receiving surface) of a solid-state image sensor smaller and increase their density to achieve higher resolution, but due to the limits of semiconductor process miniaturization technology, this higher density cannot be achieved. There will also be restrictions.

Furthermore, even if the resolution of solid-state image sensors becomes higher than the current level, it will be easier to improve the resolution of printer units, and it is highly unlikely that the resolution of solid-state image sensors will be surpassed. If the line head used for this is a thermal head, for example, the resolution depends on the miniaturization of the thermal element that makes up the line head, but this miniaturization technology is precisely based on the miniaturization of thin-film magnetic heads. This is much easier than miniaturization of a CCD.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to solve this problem and provide a copying apparatus that can obtain high-resolution, high-quality print images using low-resolution photoelectric conversion means.

[Summary of the invention]

In order to achieve this object, the present invention provides a glass plate between the photoelectric conversion means and the subject, drives the glass plate in synchronization with the image reading cycle of the cough photoelectric conversion means, and A high-resolution image in which the number of pixels per image is increased by alternately forming optical images of the subject shifted by a predetermined amount on the sensor section, and equivalently increasing the number of light-receiving elements in the seven sections. It is distinctive in that it was made to obtain No. 13.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a copying apparatus according to the present invention, in which 1 is an incident light beam, 2 is a glass plate section, 3 is an optical system, 4 is a solid 14Ii image element, 5 is a drive circuit, and 6 is a block diagram showing an embodiment of a copying apparatus according to the present invention. is a signal processing circuit, 7 is an A/D converter (analog-digital converter), 8 is a memory, 9 is a control section, 10 is a signal processing circuit, 11 is a printer section, 12 is a monitor section, and 13 is an angle control circuit. .

In the figure, parallel incident light l from an object (not shown)
is the glass plate part 2. Solid 41 image sensor 4 through optical system 3
The light is irradiated onto the sensor section of the object, and an optical image of the subject is formed on this sensor section. The solid-state image sensor 4 scans the sensor section at high speed in response to a control signal from the drive circuit 5, and generates an image signal according to this optical image. This image signal is processed by the signal processing circuit 6, then digitized by the A/D converter 7 and stored in the memory 8.

As shown in FIG. 2, the glass plate portion 2 is swung in a parallel plane period. That is, as shown in the figure, the glass plate 1
4, each time the solid-state image sensor 4 scans one frame, the incident surface is in a state shown by a broken line perpendicular to the incident light 1, and in a state shown by a solid line in which it is tilted by an angle θ (≠0°) with respect to this state. They are rotated periodically at an angle θ1 so as to alternate. Therefore, when the glass 41i14 is in the state shown by the solid line,
Since the incident light l is refracted by the glass plate 14, the glass vi1
4 is in the state shown by the solid line, the position of the optical image on the sensor section 15 is displaced by ΔX.

In this way, the glass plate 14 is swung by an angle θ1 every frame scan of the solid-state image sensor 4, and the optical image on the sensor section 15 is displaced by ΔX every frame. is set to 1/2 the length of the pitch of the light receiving elements arranged two-dimensionally in the sensor unit 15. As a result, between two consecutive frames, pixel information obtained in one frame period is shifted by 1/2 pitch of the light receiving element in the other frame period, but this is due to the above-mentioned problem. This is pixel information between the pixel information obtained in one frame period, and cannot be obtained using conventional techniques that do not cause the optical image to swing.

This is equivalent to increasing the number of pixels by further providing a light receiving element between the light receiving elements in the sensor section of a conventional solid-state image sensor, but as a means to increase the number of pixels, The optical image on the sensor section 15 is swayed by the glass plate section 2, and the pixel information obtained by the conventional technique and the pixel information in between are obtained from the same light receiving element. Therefore, a conventional solid-state image sensor having a limited number of light receiving elements can be used as the solid-state image sensor 4, and an image signal with twice the number of pixels than the conventional technology can be obtained. In this case, it goes without saying that the image signal of one image is obtained by scanning two frames of the solid-state image sensor 4. When printing a still image such as a photograph or painting, the image signal of one image is obtained by scanning two frames of the solid-state image sensor 4. It does not matter how many frames are scanned to obtain the image.

Here, this displacement amount ΔX is determined from FIG.

Now, the thickness of the parallel plane glass plate 14 is d, the incident angle of incident light A is θ3, the refraction angle is θ2), the exit angle of transmitted light C is θ1
, if the absolute refractive index in air is nl and the absolute refractive index of the glass plate 14 is n8, then n, sin θ+ quasi-ntsin? '
* −n+sinθs ---(1) holds, and θ
, -θ. That is, the transmitted light C and the incident light A become parallel lights. Moreover, the displacement amount ΔX of the i3 incident light C with respect to the incident person is cos θ! Here, J n @” n +”! ln'' θ■ cos θ weight 1□-...-131 n! Therefore, from the expressions fly, f3), the expression (2) becomes as follows.

Here, in the case of air, nl-1 and n!
``If n, equation (4) becomes further as follows.

From this equation (5), the magnitude of the displacement ΔX is the incident angle θ.

It can be seen that this changes depending on the thickness d of the glass plate 12.

Note that if the incident angle θ1 is not so large, 5i
n(θ1-θ:)-〇I-θi*co30g-1
Therefore, the above formula (2) becomes Δx=(θ1−θ,)・d −−−−−−
It can be expressed as -1～-・・・・・−1-161,
Furthermore, the law of refraction
n), −5inθ! Considering, equation (6) becomes as follows.

ΔX=-θ,・ □・d −・−・−・−・・−・(
7) In this way, when the glass plate 14 is tilted by θ1,
The transmitted light C is displaced by ΔX expressed by equation (5) or proximally equation (7).

Now, the pitch of the light receiving elements of the solid-state image sensor is set to 20.
μm, n-1,6, Δx-10μm, so using equation (7), θ+d-0.0266rad-am=1.53delB
mm −181. Also, the thickness d of the glass plate 14
If 0.5 mm, the angle of incidence θ from 2 (8) is approximately 3
°. That is, in FIG. 2, the deflection angle θ1 of the glass plate 14 may be approximately 3°.

As shown in FIG. 4, the direction of deviation of the light image in the sensor unit 15 may be in the horizontal direction shown by a dashed line with respect to the light image 16 shown by a solid line, or in the vertical scanning direction shown by a broken line. In the former case, the number of horizontal pixel information increases, and in the latter case, the number of horizontal scanning lines increases. Furthermore, one of the light receiving elements is simultaneously scanned in the horizontal and vertical scanning directions.
/2 pins may be shifted.

Returning to FIG. 1, the memory 8 has a storage capacity of 2 frames, and is divided into 1 frame by 1 frame.
One frame of digital image signal from the /D converter 7 is stored, and the digital image signal of a<x frame is stored in the other.

When obtaining a print image in the print section 11, two frames of digital image signals are sent from the memory 8 to the printer section 1.
The signal processing circuit 10 is read out at low speed according to the operation of the signal processing circuit 10.
After processing, the image is printed by the printer section 11. The signal processing circuit 10 has a line memory (not shown), and each time one frame of digital image signal is supplied from the memory 8, pixel information constituting one line of print (print data) is extracted from this digital image signal. Pixel information forming pixels along a straight line parallel to the short side of the screen is extracted and stored in a line memory, and a gradation signal is generated from this pixel information. In the printer section 11, printing is performed for each pixel data stored in the line memory using these tone signals.

Therefore, as shown in FIG. 4, if the optical image on the sensor unit 15 is shifted in the horizontal scanning direction by 1/2 pitch of the light receiving element every frame, the solid line in FIG. When one frame of digital image signals corresponding to the optical image shown in is read out and the pixels constituting one line are printed in the printer section 11 as described above, the data is then outputted from the memory 8 by the dotted chain line in FIG. One frame of digital image signals for the optical image shown by is read out, and pixels for this digital image signal are printed between the printed pixels. That is, by reading two frames of digital image signals from the memory 8, the printer section 11 prints one line of pixels. Therefore, in the printer section 11, since the photographic paper moves by one pixel for each l line of printing, assuming that the printing time is equal to that of a conventional copying device, the printer section 1
1, it is necessary to set the time for one print to half that of a conventional copy device. This is possible by matching the reading speed of the memory 8 with the operation of the printer section 10.

Instead of the above, the pixel information of the digital image signal of each frame period read from the memory 8 is added to form a new 1947-minute pixel information group, and one pixel information group is added at one time.
The pixels of the entire line may be printed.

In addition, instead of printing each time the memory 8 reads one frame of digital image signals, the storage capacity of the line memory of the signal processing circuit 10 is doubled as compared to the above case, and the two frames read from the memory 8 are printed. The pixel information constituting one entire line is extracted and stored from the digital image signal of a frame, and the pixel information of the digital image signal of one frame is interpolated between the pixel information of one digital image signal of one frame in the line memory. It is also possible to arrange one line of pixel information extracted from two frames of digital image signals so that the entire line of pixels can be printed at one time.

In this case, it goes without saying that the number of head elements of the line head in the printer section 11 is twice that of the prior art.

As shown in FIG. 4, when the optical image on the sensor unit 15 is shifted in the vertical scanning direction by 1/2 pitch of the light receiving element every l frames, each time the memory 8 reads out one frame of digital image signal, Next, pixel information constituting one line is stored in a line memory and printed, and upon completion of printing, the photographic paper is moved by 1/1 of the conventional l line interval. This method can also be used when shifting in the horizontal scanning direction, as shown by the solid line and the dashed-dotted line in FIG. In this case, the positional relationship between the pixels of the printed image based on the image signal of one frame and the pixels based on the image signal of the other frame is different from that of the original image, but since they are close to each other, this is not a particular problem. .

Next, when monitoring with the monitor section 12, the digital image signal is read out from the mesori 8 at high speed, digital-to-analog converted by the signal processing circuit 10 into a normal video signal, and this is supplied to the monitor section 12. be done. Therefore, on the monitor unit 12, the image to be printed is displayed as a still image. In this case, only one of the two stored frames of digital image signals is read out from the memory 8.

Note that the A/D converter 7, the memory 8. Signal processing circuit 1
0. The drive unit 5 and the like are controlled by a control unit 9. During printing, a drive signal is supplied from the printer section 11 to the control section 9.

In this way, since the number of pixels is very large, a high-resolution copy can be obtained that matches the original image, such as a very high-resolution photograph or painting.

FIG. 5 is a block diagram showing another embodiment of the copying apparatus according to the present invention, in which 1' is incident light, 17 is an optical system, 1 is a color filter group, 19 is a switching circuit, and 20 is a subject. , parts corresponding to those in FIG. 1 are given the same reference numerals and redundant explanations will be omitted.

In the embodiment shown in FIG. 1, a color copy can be obtained by using a color solid-state image sensor as the solid-state image sensor 4, but normally each light receiving element of the color solid-state image sensor is provided with a different color filter. , the number of light-receiving elements to obtain each primary color signal is limited.For this reason, the number of pixels per two frames of each primary color signal is more than twice the number of light-receiving elements in the sensor section. Very few.

This embodiment shown in FIG. 5 makes it possible to obtain primary color signals with a very large number of pixels, and also to obtain high-resolution color copies.

In FIG. 5, the solid-state image sensor 4 is a black and white solid-state image sensor, and an optical system 17 and R(
and a color filter group 18 having three primary color filters: red), G (green), and B (blue).
is driven by a switching circuit 19 controlled by the control unit 9, and each time the solid-state image sensor 4 scans one frame, R
The filter, G filter, and B filter 111 are switched and inserted one by one into the optical path of the incident light 1'. Glass plate part 2
Then, by the angle control circuit 13, every 3 frame periods,
As explained in FIG. 2, the glass plate 14 is swung by an angle θ.

Therefore, when the R, G, and B filters of the color filter group 18 are sequentially switched and inserted for each frame period when the glass plate 14 is in the state shown by the broken line in FIG. In the section, the R, C, and B optical images are connected for each frame period as shown by the solid line 16 in FIG.
The B signal is obtained in sequential order. These will be referred to as primary color signals without positional deviation.

Next, in the glass plate section 2, as shown in FIG. 2, the glass plate 14 is tilted by an angle θ1 shown by the solid line for three frame periods, and the color filter group 18 is rotated for each frame period. , G, and B filters are switched and inserted in order. In the sensor unit 15 of the solid-state image sensor 4, as shown by the broken line or the dashed-dotted line in FIG. G.
A B light image is formed. Therefore, R, G, and B signals for the optical image are obtained from the solid-state image sensor 4 in a frame-sequential manner for each field period. These will be referred to as primary color signals of positional deviation.

In this way, primary color signals without positional deviation and primary color signals with positional deviation are obtained alternately every three field periods, and the A/D
It is digitized by converter 7 and stored in memory 8.

FIG. 6 is a configuration diagram showing a specific example of the memory 8 in FIG. 5, in which 21 is an input terminal, 22 is an input selector, 2
3 is an output selector, 24 to 29 are frame memories, 30
is an input terminal, and 31 is an output terminal.

In the figure, digital primary color signals from an A/D converter 7 (FIG. 5) are supplied from an input terminal 21 to an input selector. The input selector 22 is connected to the control section 9 (FIG. 5).
By means of a control signal supplied via input terminal 30 from
R, G, and B signals are determined from the input digital primary color signals and stored in predetermined frame memories 24 to 29, respectively. Here, R of the digital primary color signal without positional deviation is
,G.

The B signals (represented as R, , G, , B in FIG. 6) are stored in the frame memories 24, 25, and 26, respectively, and the digital primary color signals R, G, and No. 818 (represented as R, G, and B in FIG. In Figure 6, R,,G,, respectively.

B) is the frame memory 27.28゜2
9, respectively.

When reading digital primary color signals from the memory 8, the frame memories 24 to 29 are read out from the printer unit 11 (
Reading is performed at a speed corresponding to the operating speed shown in Figure 5),
The output selector 23 to which a control signal is supplied from the control section 9 (FIG. 5) via the input terminal 30 selects one of the outputs of the frame memories 24 to 29, and selects the output from the output terminal 3.
1 to a signal processing circuit 10 (FIG. 5).

This output selector 23 first selects the frame memory 2
The R- and Rb signals read from 4.27 are alternately selected for each frame. These R,.

The R1 signal corresponds to the digital image signal of one frame each read out from the memory 8 in the embodiment of FIG. 1, and similarly to the embodiment of FIG. A C1 (cyan) image corresponding to the image is printed on photographic paper.

Figure 7 shows the C2 image when the R1 signal and the image information of the R1 signal are added together and printed.
(a + b) + 7 (however, i, J-1, 2゜3, ・
・−・−・・) represents the first pixel of the jth line of this C7 image, but also (a + b) + j
represents the addition of the j-th image information of the first horizontal scanning period of the R,, R, signal. That is, in the figure, for example, C, (a
+bL++ Cy(a (1)L++Cy(a”
b) s+, C, (a + b) 4++-=·=- form one line of pixel array of the print C7 image, and are printed one line at a time in the direction of the arrow.

Next, the output selector 23 alternately selects the C, , C, signals read from the frame memory 25° 28 for each frame, and similarly selects M, (magenta), which is the complementary color of G.
The ri image is superimposed on the previous C7 image and printed on photographic paper.

Furthermore, the output selector 23 has frame memories 26 and 29.
The a, , and B signals read out from the a, , and B signals are alternately selected for each frame, and in the same way, a Y (yellow) image, which is a complementary color of B, is superimposed on the color image and printed on photographic paper. This results in a full-color printed image.

According to this embodiment, the R, G, and B signals are obtained from almost all of the light receiving elements of the solid-state image sensor 4, so that the number of pixels for each is smaller than when using a color solid-state image sensor. The number of printed images becomes very large, and therefore the resolution of the obtained printed image is extremely high, and a printed M image as clear as the original image can be obtained.

When the optical image is shifted in the vertical scanning direction of the sensor unit 15 as shown by solid lines and broken lines in FIG. In other words, in FIG. 8, Cy(a)tj is the first pixel of the jth line of the CVM image, and the jth pixel of the first horizontal scanning period of the R1 signal. It is obtained from pixel information, and iJ%, C, (b) + j is the same < (1 + 1)th line's 1st @element, and is the 1st @element of the 1st horizontal scanning period of the R1 signal. If it is obtained from pixel information, one frame of R1 signal is read out from memory 8 and C
y(a)1++C,(a)t++Cy(a
)
1 signal is read out, 4 plates, Cv (b) + r,
Cy (b) t + , Cy (b) s
The pixel column of the next line of I, -------- is printed. In this case, it goes without saying that the spacing between lines is 1/2 that of a conventional copying device.

It should be noted that in the case of the printing method shown in Fig. 7, the resolution of the printed image is lower than that shown in Fig. 8, but the resolution is much higher than that of conventional copying devices. It is.

In FIG. 5, when monitoring, from memory 8 to R,
The C, B signals are read out at high speed, converted into normal video signals by the signal processing circuit 10, and sent to the monitor unit 12.
In this case, if a primary color signal without positional deviation and a primary color signal with positional deviation are used as a monitor, 4 fields constitute one frame, and the monitor unit 12 monitors video No. 18, which consists of 2 fields and 1 frame. Because the monitor is configured to
From there, only one of the digital image signals without positional deviation or the digital image signals with positional deviation is read out, and this is used for monitoring.

In addition, in this specific example, after obtaining R, G, and B signals one frame at a time, that is, every time one primary color signal for three frames is obtained, the glass plate section 2 is driven to shift the optical image on the sensor section 15. However, each time the primary color signal of a frame is obtained, the glass plate section 2 is driven to generate R,,R,.

The same primary color signal may be obtained for two consecutive frames, such as G, , C, , B, , Bb. In addition, optical system 1
7 is like a VA barrel, and W1 is equipped with a zoom lens. This can be used as a zoom lens to enlarge the original image or obtain a printed image. In Fig. 1,
This optical system 17 is omitted.

FIG. 9 is a structural diagram showing a specific example of the glass plate portion 2, 32 is a support portion, and parts corresponding to those in FIG. 2 are given the same reference numerals.

In FIG. 9, opposing two of the parallel plane glass plates 14
The center portions of the two sides are supported by support portions 32, and are provided in front of the sensor portion 15 of the solid-state image element 4 so as to be rotatable in the direction of the arrow with respect to the support portion 32. and,
As explained in FIGS. 2 and 3, the solid-state image element 4
The glass plate 32 is rotated by a predetermined angle in synchronization with the scanning, and two optical images that are shifted by 172 pitches of the light receiving element are alternately formed on the sensor section 15.

FIG. 10 is a structural diagram showing another specific example of the glass plate portion 2, in which 33 is a motor, and parts corresponding to those in FIG. 2 are given the same reference numerals.

In this specific example, as shown in the figure, the glass plate 14 has a disk shape, and the thickness of one half of the glass plate 14 is different from the thickness of the other half of the glass plate 14 . Further, this glass vi12 is attached to the rotating shaft of the motor 33 so that its surface is inclined at a predetermined angle with respect to the surface of the sensor section 15. The motor 33 is intermittently rotated in synchronization with the scanning of the solid-state image element 4, thereby intermittently rotating the glass vi 14 in the direction of the arrow. 15 and 1 of the light receiving element to each other.
Optical images shifted by /2 pitch are alternately obtained. In this way, the positional shift of the optical image due to the difference in the thickness of the glass plate 14 can be explained by equation (5) with the angle θ1 constant.
Or it is clear from (7), for example, equation (7)
The thickness d, d, of each half of the glass plate 14 may be set so as to satisfy the following: 172 pitch of the light receiving element - θ1·□·(dt~d,).

Further, as shown in FIG. 11, the rotation axis of the motor 33 is made parallel to the incident light 1, and one inner half of the disk-shaped glass plate 14 attached to this is made parallel to the surface of the sensor section 15. The other inner half portion may be inclined at a predetermined angle with respect to the surface of the sensor portion 15. In this case, the inclined inner half portion may be made thinner than the inner half portion parallel to the surface of the sensor portion 15. As a result, the difference in optical path length due to the inner portion can be reduced, and the out-of-focus of the optical image formed on the sensor section 15 can be reduced.

FIG. 12 is a structural diagram showing still another specific example of the glass plate section 2, in which 34 is a rotational drive device, 35 is a parallel displacement device, and parts corresponding to those in FIG. 2 are given the same reference numerals. There is.

In this specific example, the solid-state image sensor 4 is connected to the printer section 11.
The scanning direction is made to match the operating speed shown in FIGS. 1 and 5 and to match the scanning direction of the printer section 11.

That is, in FIG. 12, the direction of the arrow A of the sensor section 15 corresponds to the line direction of the printer section 11, and the solid-state II image element 4 scans in the direction of the arrow A in accordance with the printing speed of the printer section 11. By scanning, pixel information constituting one line of a print image is generated. This scanning in direction A is sequentially shifted in the direction of arrow B, and one frame of image signal is obtained by scanning the entire sensor section 15.

Here, the glass plate 14 receives the sensor portion 15 of the incident light 1.
is positioned so that the light irradiated on the part being scanned in the direction A in the sensor part 15 passes through, and for this reason, the parallel movement device 35 moves the part scanned in the direction A in the sensor part 15 into the direction indicated by the arrow A. While moving in direction B, the glass plate 14
moves in the direction of arrow B. Further, the glass plate 14 is rotated by a predetermined angle by the rotation drive device 34 in synchronization with the scanning of the solid-state image sensor 4, as explained in FIG. 2, and scanning is performed in the direction indicated by the arrow. The optical image of the portion is shifted by 1/2 pitch of the light receiving element every predetermined frame.

According to this example, the glass plate 12 can be made extremely small, and a memory with a capacity of one line can be used instead of the large capacity memory 8 shown in FIG. 1 or FIG. , it is possible to achieve significant cost reductions.

In addition, in this specific example, the thickness of the glass Fi 14 is made different around the axis of rotation, and the position of the optical image formed on the sensor section 15 on one side and the other side is shifted as described above. Good too. Further, in this case, by rotating the glass plate 14 by half a rotation each time the sensor unit 15 scans in the A direction, the light receiving elements are mutually rotated by 1/2 turn each time the sensor unit 15 scans in the direction A.
Image signals corresponding to optical images shifted by 2 pitches can be obtained alternately, and as shown in FIG. One line of pixels (indicated by ■) based on the image signal can be printed alternately. Needless to say, even in this case, a high-resolution print image can be obtained.

Although the present invention has been described in detail above, it goes without saying that the present invention is not limited to these embodiments and can be modified within the scope of the claims.

The installation position of the glass plate section 2 may be between the solid-state image sensor 4 and the imaging optical system 3, or may be in front of the optical system 3 (on the subject side). However, in the former case, although there is a disadvantage that the out-of-focus becomes large when the incident light is not parallel light, there is an advantage that the glass plate 14 can be made smaller; in the latter case, the opposite advantage is that There are disadvantages. Therefore, each has its advantages and disadvantages, so it is necessary to take these into consideration when making a decision.

〔Effect of the invention〕

As explained above, according to the present invention, by driving the glass plate, the number of light receiving elements of the optical IT conversion element is equivalently increased, and the number of pixels of an image signal per image is increased by driving the glass plate. The number of light-receiving elements is larger than the number of light-receiving elements, and the light has a low resolution! A high-resolution image signal suitable for a high-resolution printer section can be obtained from the conversion element, resulting in high resolution,
The excellent effect of being able to obtain high-quality printed images can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a copying apparatus according to the present invention, FIG. 2 is an explanatory diagram of the action of the glass plate section in FIG. 1, FIG. 3 is an explanatory diagram of optical path displacement by the glass plate, and FIG.
The figure is an explanatory diagram showing the displacement of the optical image by the glass plate section in the sensor section of the solid-state image sensor in FIG. 1, FIG. 5 is a block diagram showing another embodiment of the copying apparatus according to the present invention, and FIG. A configuration diagram showing an example of a memory unit in FIG. 5, 7th
8 and 8 are explanatory diagrams of the printing operation of the embodiment shown in FIG. 5, respectively, and FIGS. 9 to 12 are structural diagrams showing specific examples of the glass plate portion in FIG. 1 or 5, respectively. 1st
FIG. 3 is an explanatory diagram of the printing operation by the glass plate section shown in FIG. 12. 2... Glass plate part, 4... Solid-state image sensor, 7...
...A/D converter, 8...Memory, 11...
...Print section, 13...Angle control circuit, 14...
...Glass plate, 15...Sensor part. Agent Patent attorney 2 Kenjibe (and 1 other person) -+-1 A9, l (Figure 1 z Figure 2 Figure 3 ＼ Figure 6 Figure 1 Figure 8 Figure 9 Figure 10 Figure 11 da > db Figure 12 Figure 13

Claims (3)

[Claims] (1) In a copying apparatus in which a photoelectric conversion means is irradiated with a luminous flux from an original image to obtain an image signal, and the image signal is used to obtain a printed image of the original image, there is a gap between the original image and the photoelectric conversion means. By providing a movable glass plate in the photoelectric conversion means and driving the glass plate in synchronization with the image reading cycle of the photoelectric conversion means, optical images of the original images that are shifted by a predetermined amount from each other are alternately formed on the photoelectric conversion means. A copying device characterized in that it is configured to make an image. (2) A copy according to claim (1), wherein the amount of positional deviation is a distance that is half the pitch of the light receiving elements arranged in the sensor section of the photoelectric conversion means. Device. (3) Claims (1) or (2), wherein the glass plate is driven at intervals of an integral multiple of two or more of the frame scanning period of the photoelectric conversion means. Device.