JPH0291636A - Copying device - Google Patents

Abstract

PURPOSE:To accomplish accurate photometry in spite of a small-sized device by performing the photometry by a photometric device just behind the advancing direction of the exposing light of an image-formation lens and making it possible that the photometric device can move out of the flux of the exposing light. CONSTITUTION:By turning on the light source 84 of a light source unit 81, the original image of an original 130 is irradiated with the light from the light source 84 and the reflected light from the original passes through a slit 87 and is reflected by mirrors 86, 88 and 90. Then it passes through a lens unit 92 and is made incident on the photometric device 94. The photometric data read by the photometric device 94 is transmitted to a control circuit 95, calculated and converted into a control signal in accordance with exposure correction conditions to be transmitted to a driving circuit 96. Since the photometry by the photometric device 94 is performed just behind the advancing direction of the exposing light of the image-formation lens, the small-sized one in which a condensing lens and a diffusing plate are not needed can be used. Moreover, accurate photometry can be possible and the excellent correction of exposure can be performed because the photometry is performed in a state where the light quantity is large just behind the lens unit 92.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention particularly relates to a color copying apparatus for copying color originals.

<Prior art> Copying devices using various photosensitive materials such as silver halide photosensitive materials, photosensitive pressure sensitive photosensitive materials, photosensitive resin materials, etc., and Shigeko photocopying devices are capable of copying various color originals. Color copying devices are becoming popular.

In such a color copying device, the original images to be copied are mainly reflective originals such as color photographs and color printed matter, but in addition to these, negative films, slides,
Various transparent originals, such as microfilm, and even projected images of such transparent originals are also suitable objects to be copied.

By the way, when copying such various original images, in order to obtain a good copy image, depending on the type of the copy original, the shading and color tone of the original image, and the photosensitive material used,
It is necessary to adjust the amount and quality of the exposure light.

In other words, if the original to be copied is a transparent original or a reflective original, the CC
The amount of light required for balance and copying is completely different. Also, even if the same reflective original is used, there may be differences in color materials between photographs and printed matter.
Since there is a difference in visibility and spectral sensitivity of the original image, if copies are made under the same copying conditions, the resulting copies will have different CC balances. Furthermore, even if it is a transparent original, the CC balance is different between negative film and positive film, so even if the conditions are optimal for negative, they will not match for positive, and conversely, even if the conditions are optimal for positive, they will not match for negative. It becomes a condition.

Therefore, in order to obtain high-quality copied images, the exposure device is equipped with a light control device that has eight filters, apertures, etc. in the exposure optical path. Light intensity and light quality are being adjusted.

In a normal copying machine, a pre-scan is performed before copying the original G4 image, and during this pre-scan, the light reflected from the original image is measured by various photometers, and the light is adjusted according to the photometry results. Various dimming conditions by the device are determined.

These photometers basically measure R (red).
- It has a light sensor corresponding to the three colors of G (green) and B (blue), and this sensor measures the light amount and density of the three color components.

<Problems to be Solved by the Invention> By the way, in a normal copying device, in order to measure the amount and quality of reflected light as close to the exposure position as possible,
Such a photometric device is placed at a position where the distance from the imaging lens is approximately equal to the imaging plane, which is the exposure position, that is, at a position that is approximately conjugate.

Therefore, at the position where the photometric device is placed, the reflected light is almost in an image-formed state, and the luminous flux is sufficiently spread and R-
The three color components of G and B are almost separated according to the original image.

However, the optical sensor described above is not very large and cannot measure a wide range of light, so it can only measure a small portion of the reflected light, and it is difficult to accurately measure the entire reflected light flux. , a condensing lens such as a Fresnel lens must be used to converge the light.

In addition, even if the reflected light is converged using a condenser lens, the three color components mentioned above remain separated, so depending on the position of the optical sensor, the distribution of each color component will be extremely biased, making accurate measurement impossible. Therefore, it is necessary to use a diffuser plate or the like to sufficiently mix each component and perform more accurate measurements.

Furthermore, if the photometric device is placed in such a position, when the light collected by the Fresnel lens or the like passes through the diffuser plate, the light will be diffused due to lack of directionality. As a result, the quality of light entering the optical sensor varies, and multiple optical sensors must be used for each of the R, G, and B colors, which, combined with the aforementioned condensing lens and diffuser plate, results in a large photometric device. This also results in high costs.

Furthermore, even if a condensing lens is used as described above, it is not possible to measure most of the reflected light, and in order to measure most of the reflected light, a large condensing lens is required, which requires additional photometry equipment. This results in an increase in size and cost.

An object of the present invention is to solve the problems of the prior art described above, and to provide an inexpensive and compact photometry device that does not require a condenser lens, a diffuser plate, etc., and to perform good exposure. It is an object of the present invention to provide a copying apparatus capable of obtaining high-quality copy images.

Means for Solving the Problems> In order to achieve the above objects, the present invention provides an exposure light source;
In a copying apparatus having a plurality of mirrors, an imaging lens, a light control device for adjusting light quantity and light quality, a photometry device for measuring light quantity and light quality, and a means for moving the photometry device. The present invention provides a copying apparatus, wherein photometry by the photometry device is performed immediately after the exposure light traveling direction of the imaging lens, and the photometry device is movable out of the exposure light beam.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A copying apparatus according to the present invention will be described in detail below based on preferred embodiments shown in the accompanying drawings.

FIG. 1 shows a schematic front view of an exposure section unit of an embodiment of a copying apparatus of the present invention.

The exposure section unit 1 of the embodiment of the copying apparatus of the present invention shown in FIG. A lens that combines a unit 81, a mirror unit 89 for reflecting in a predetermined direction the reflected light (exposure light) irradiated by the light source unit and reflected on the original 130, an imaging lens, and a light control device. It is composed of a unit 92, a photometric device 94 for measuring the amount and quality of reflected light, and a moving means 97 for moving the photometric device 94.

In the copying apparatus of the present invention, photometry of the light reflected from the original YJ 130 during pre-scanning is performed immediately after the imaging lens, that is, in the example shown in FIG. 1, the lens unit 92 in the direction in which the exposure light travels. Therefore, in the example shown in FIG. 1, the photometric device 94 is disposed immediately after the lens unit 92 in the direction in which the exposure light travels, so that it can be moved out of the exposure light beam by the moving means 97.

The light source unit 81 includes an exposure light source 84 , a reflector 85 having a slit 87 through which exposure light emitted by the light source 84 and reflected on the document 130 passes, and a reflector 85 that reflects the exposure light that has passed through the slit 87 onto a mirror unit 89 . mirror 86
It consists of

During exposure, the light source unit 81 scans in the direction of the arrow and irradiates the original 130 placed on the original platen 80 with the image facing down, by a driving means (not shown). Note that this driving means may be any known method such as a belt or wire drive method, a rack and binion, or a precision feed screw.

The mirror unit 89 is composed of two mirrors 88 and 90, and during scanning, the mirror unit 89 is moved in the same direction at half the speed of the light source unit 81 by a driving means (not shown) to reflect light reflected from the original 130. It is reflected on the lens unit 92. Note that the driving means may be a known method similar to the light source unit 81 described above.

The lens unit 92 is a combination of an imaging lens for forming an image of exposure light and a light control device for adjusting the light quantity and quality of the exposure light. , first color filter plate 204, fixed aperture 20
6, a second color filter 208, a rear lens group 202, and a variable aperture 214 are arranged. This lens unit 92
This will be explained in detail later.

Immediately after this lens unit 92, a photometric device 94 for measuring the amount and quality of light reflected from the original 130 is disposed so as to be movable by moving means 97 out of the exposure light beam.

FIG. 2 shows a partially enlarged plan view of the exposure section unit 1 of the copying apparatus of the present invention shown in FIG.

As shown in FIG. 2, during pre-scanning or white balance correction, the photometer 94 is placed in the reflected light beam immediately after the lens unit 92 shown by the solid line in the figure, and the amount of reflected light is measured immediately after the imaging lens. - This is used to photometer the light quality, and during exposure, it is moved by the moving means 97 to a position shown by a dotted line in the figure outside the exposure light beam.

There are no particular restrictions on the moving means 97 of the photometric device 94;
Various known methods such as a rack and pinion method, a wire drive method, a solenoid method, etc. may be used.

Furthermore, in the example shown in FIG. 1, the photometric device 94 moves in the vertical direction of the exposure section unit 1 and moves out of the exposure beam, but the present invention is not limited to this. There is no restriction on the direction of movement as long as it is movable outside the exposure light beam, such as in the lateral direction or even in the direction of rotation around an arbitrary fulcrum.

The photometry device 94 includes a red (R) sensor 94r having sensitivity in the 590 nm to infrared range, a green (G) sensor 94g having sensitivity in the 480 to 680 nm range, and a 370 to 510 nm sensor 94r.
It has a blue (B) sensor 94b that is sensitive to nm, and measures the light corresponding to each, and measures the light quantity and light quality of the reflected light flux.

The photometric data here is sent to a control circuit 95 for calculation, converted into a control signal according to exposure correction conditions, and sent to a drive circuit 96. Next, the drive circuit 96 receives this control signal and adjusts the insertion amount of each filter of the lens unit 92 and the aperture amount of the variable aperture 214.

In the copying apparatus of the present invention, such photometry by the photometry device 94 is performed immediately after the imaging lens in the exposure light traveling direction, that is, immediately after the lens unit 92 in the illustrated example.

At such a position, the reflected light is in a highly converged state, so unlike a conventional exposure device in which a photometric device is placed at a position almost conjugate to the image plane, the photometric device 94 does not use a condensing lens or the like. However, it is possible to photometer most of the reflected light flux from the original 130.

In addition, since photometry is performed immediately after the reflected light passes through the imaging lens, unlike the imaging position, the R, G, and B colors of the reflected light are mixed, and as described above, the reflected light flux is converged. Therefore, there is no need to use a diffusion plate.

Furthermore, when photometry is performed at a position almost conjugate with the imaging plane, multiple sensors corresponding to R, G, and B are required, but they are placed immediately after the imaging lens (lens unit 92). As a result, it is possible to perform photometry in a state where light quantity loss is small and light quality is suitably mixed, so it is sufficient to use one sensor for each color.

Therefore, in the copying apparatus of the present invention, since it is sufficient to use the small and inexpensive photometric device 94, the entire exposure device can also be made inexpensive and compact.

In addition, by measuring the reflected light at the above position, it is possible to perform photometry with a higher light intensity than when measuring at a position conjugate to the imaging position, making it possible to perform accurate photometry. can.

Therefore, good light control can be performed according to the original image, and a good copy image can be obtained.

In the example shown in FIG. 2, the main body of the photometric device 94 moves, but the present invention is not limited to this. For example, the photometric device 94 can be moved as shown by the dotted line in FIG. Place the original 13 in a fixed position and place it in the optical path.
It may be configured such that a rotatable mirror is inserted to reflect the reflected light from 0 and the light is reflected to the photometric device 94.

However, even in this case, the photometry by the photometer 94 is
The exposure is performed immediately after the imaging lens in the direction in which the exposure light travels.

Furthermore, the arrangement position of the photometry device 94 is not limited to that shown in FIG. 92, and the rear lens group 202
It may be placed immediately after.

The lens unit 92 is a combination of an imaging lens and a light control device as described above, and each filter is inserted according to the photometry data of the photometer 94, and the variable aperture 21
Adjust the aperture amount in step 4 to adjust the amount and quality of the exposure light.

An example of such a lens unit 92 is the configuration shown in FIG. 3.

As described above, the lens unit 92 shown in FIG.
8. A rear lens group 202 and a variable aperture 214 are arranged.

Here, the first and second color filter plates 204 and 208 are made of, for example, transparent glass plates, with a transparent central part and color filter films of different colors deposited on both sides, as shown in FIG. The first color filter plate 204 has C (cyan) and Y (yellow) color filters, and the second color filter plate 208 has C (cyan) and M (magenta) color filters.

The first and second color filter plates 204 and 208 are measured by the photometry device 94 by pre-scanning,
The drive source is driven by a drive circuit 96 according to exposure correction conditions calculated and determined by a control circuit 95, and the amount of insertion of each color filter into the optical path can be changed.

The insertion amounts of the color filter plates 204 and 208 are adjusted by stepping motors 204a and 208a, which serve as driving sources, respectively.
Gears 204b and 208b provided at the shaft end of the gear 204b.

Reduction gears 204c mesh with 208b.

208c, and racks 204d and 208d that mesh with the reduction gears 204c and 208c and are provided on the respective color filter plates 204 and 208.

The variable diaphragm 214 is made up of a diaphragm plate 210° 212 and a plate cam 216.
18, 218, 219° 219 and aperture plate 210, 212
The diaphragm plates 210 and 212 are moved in mutually opposite directions by engaging the bins 220, 220, 221, and 221 fixed to the diaphragm plates 210 and 212, respectively. Here variable aperture 21
Similarly, the aperture amount of No. 4 is determined by using the stepping motor 214a as the driving source and using the gears 214b and 2 according to the exposure correction conditions.
14c and rack 214d to move the plate cam 216 and move the pair of aperture plates 210, 212 in opposite directions.

FIG. 4 shows a preferred example in which the copying apparatus of the present invention is applied to a copying apparatus using a silver salt photographic light-sensitive material.

The silver halide photocopying apparatus 10 (hereinafter referred to as the copying apparatus 10) shown in the figure has a photosensitive material supply section unit 16 on the right side, the above-mentioned exposure section unit 1 above, and a processing section unit 20 below. is provided.

The photosensitive material supply section unit 16 has a photosensitive material conveyance path within the photosensitive material supply section frame 28, and a pair of magazines 30.32 are removably attached to the upper and lower sides, and photosensitive materials 34.36 are stored inside these magazines. are housed in a roll, respectively, and are taken out from the tip to the photosensitive material supply unit 16. - For example, 34 is a photosensitive material that is most suitable for copying color printed originals that are reflective originals;
6 is a photosensitive material most suitable for copying transparent color slide originals or color negative film originals.

At the front of the magazine 30, conveyor rollers 42a and 42b for drawing out the photosensitive material 34, and a cutter 44 for cutting the photosensitive material 34 into a predetermined length are arranged.

Between the cutter 44 and the exposure section 46 are photosensitive material conveyance guides 48a, 48b, 48c and conveyance rollers 50.5.
2 is arranged to guide the cut photosensitive material 34 to the exposure section 46.

The exposure section 46 is a part that defines an exposure position 46a of the photosensitive material 34, and in this exposure section 46, the exposure section unit 18
A glass plate 54 is fixed facing the imaging optical system, and a press plate 56 is pressed to this glass plate 54.

A pair of transport rollers 5 8 a, 58 b and a transport roller Boa are provided on the upstream side (upper side) and the downstream side (lower side) of the exposure section 46, respectively.

Sob is provided.

A conveyance guide 62 that guides the exposed photosensitive material 34 downward is arranged vertically below the exposure section 46, and a conveyance guide 66 that branches the conveyance path of the photosensitive material 34 (36) is arranged in the vertically intermediate part thereof. A switching guide 64 is provided for switching to the processing section unit 20 that has passed through the processing section.

On the other hand, the magazine 32 disposed below the magazine 30 also has transport rollers 88a and 68 corresponding to the photosensitive material 36.
b and the cutter 70, and in front of them, conveyance guides 72a, 72b and a conveyance roller 74 are arranged to convey the photosensitive material 36 to the conveyance guide 48a.

The exposure section unit 1 is the most characteristic member of the present invention and has been described in detail above, so a detailed explanation thereof will be omitted.

Note that, after the exposure section unit 18 opens the photosensitive material supply section unit 16, the exposure section frame 9 of the exposure section unit 18 is opened.
8 is pivotally supported by the main body 12 of the apparatus via a bin 100, and especially when adjusting the processing section unit 20, when a jam occurs, or during maintenance, the entire exposure section unit is attached to the bin 100.
Rotate counterclockwise around the processing unit 20.
It is configured to open the top of the

The processing section unit 20 includes a processing section 22 and a drying section 24. A developing tank 102, a bleaching/fixing tank 104, and a washing tank 106 and 108 are successively provided in the processing section 22,
The processing liquid filled inside these allows for development, bleaching,
The photosensitive material 34 (36) that has been fixed and washed with water is sent to the drying section 24.

In the drying section 24, the photosensitive material 34 (36) after being washed with water is dried and sent onto the take-out tray 110.

The copying apparatus of the present invention is not limited to a copying apparatus using a silver salt photographic light-sensitive material as described above, but can also use various photosensitive materials such as a light-sensitive pressure-sensitive material, a photosensitive material, a photosensitive resin material, etc. It can be suitably applied to various copying devices such as copying devices and electrophotographic copying devices.

In addition, the originals that can be copied at this time are not only ordinary reflective originals such as color photographs and printed originals, but also various transparent originals such as negative film, slides, and microfilm, as well as projections of the above-mentioned transparent originals. It can also be suitably used when copying images.

<Operation> The copying apparatus according to the present invention is basically configured as described above, and its operation will be explained below.

In the copying apparatus 1o shown in FIG.
5 is opened, the print original 130 is placed on the original table 8o with the image facing down, and the original holder I5 is closed again.

Next, when a copy start button (not shown) of the copying apparatus 10 is pressed, pre-scanning is started in the exposure unit 1.

First, the light source 84 of the light source unit 81 is turned on and the original
30 original images are irradiated, and the reflected light passes through the slit 87.
It is reflected by a mirror 86°88.90, passes through a lens unit 92, and enters a photometric device 94 located at the position indicated by the solid line in FIG.

When the light source 84 is turned on, the light source unit 81 moves to the document table 80.
At the same time, the mirror unit 89 moves at half the speed of the light source unit, prescans the original image of the original 130 placed on the original platen 80, and displays the image information of the original image. The light amount and pre-purchase of each RGB color component are read by each sensor 94r, sensor 94g, and sensor 94b of the photometer 94.

The photometric data read by the photometric device 94 is sent to the control circuit 95.
The signal is sent to the drive circuit 96, where it is calculated, converted into a control signal according to the exposure correction conditions, and sent to the drive circuit 96.

Here, in the copying apparatus of the present invention, since the photometry by the photometry device 94 is performed immediately after the direction in which the exposure light travels through the imaging lens, it is possible to use an inexpensive and small-sized device that does not require a condenser lens or a diffuser plate. Can be done. Further, since photometry is performed in a state where the amount of light is large immediately after the lens unit 92, accurate photometry is possible, and good exposure correction can be performed as a follow-up.

Note that during prescanning, in the example shown in FIG. 3, the first and second color filter plates 204 and 208 of the imaging lens 92 are
Both are set so that the central transparent portion thereof is inserted into the optical path, and the variable aperture 214 is set to be open.

The above-mentioned exposure correction conditions are set, and the control signal is sent to the drive circuit 9.
6, the drive circuit 96 controls the stepping motors 204a, 208a, which are drive sources, according to the control signal.
, 214a by a predetermined amount, and the racks 204d, 208d, 214d rotate the first color filter plate 204, the second color filter plate 208, and the plate cam 216, respectively.
The color filter that is required during the light path, such as cyan (
C), yellow (Y), and magenta (M) are obtained, and the variable aperture 214 is set to the required aperture amount.

After the pre-scan ends, the light source unit and mirror unit return to the scan start position.

On the other hand, while the above-described prescanning and color filter and aperture correction are being performed, a photosensitive material necessary for copying according to the original is selected.

- As an example, when the photosensitive material 36 is selected as the photosensitive material for the printing document, and the photosensitive material 36 is selected, when the conveyance motor (not shown) is driven, the conveyance rollers 68a, 68b
, 74.74 feeds out the photosensitive material 36 by a predetermined length,
The cutter 70 cuts the photosensitive material 36 to a required length. Thereafter, the transport motor is driven again, and the photosensitive material 36 is sent to the exposure section 46, where it waits just before the exposure position 46a.

When the photometry device 94 moves to the position shown by the dotted line in FIG. 2 and exposure becomes possible, the light source 84 starts main scanning of the original image, and at the same time the transport rollers 58a, 58b, and 60a of the exposure section 46 are moved.

Bob starts scanning and transporting the photosensitive material 36 in synchronization with the scanning speed of the light source 84 .

During main scanning, the light emitted by the light source 84 and reflected by the original image is transmitted to a mirror 86 that moves at the same speed as the light source 84.
The light is reflected by a mirror 88°90 moving in the same direction at 1/2 the speed of the light source 84, passes through an imaging lens 92 whose color and aperture are suitably adjusted, and is synchronized at an exposure position 46a. The photosensitive material 36 being scanned and conveyed is exposed.

As this exposure progresses, the photosensitive material 36 is transferred to the conveying roller 58.
The conveyance guide 62 is inserted between a, 58b and 60a, 60b.
is sent downward through. In this case, the switching guide 6
4 does not act on the photosensitive material conveyance path, and the photosensitive material 36 sent from the exposure section 46 moves vertically downward within the conveyance guide 62. Therefore, when the exposed photosensitive material 36 is fed into the processing section 22 of the processing section unit 20, there is no slack in the intermediate portion of the photosensitive material 36 due to the speed difference between the photosensitive material supply section unit 16 and the processing section 22.

When all the exposure is completed, the light source 84 of the exposure section unit 1 is turned off, each conveyance roller temporarily rotates in the opposite direction, and the exposed photosensitive material 36 moves up the conveyance guide 62, and a part of it is inside the conveyance guide 48c. sent to.

This reverse conveyance is stopped when the leading end of the photosensitive material 36 is upstream of the switching guide 64.

Thereafter, each conveyance roller is rotated again in the same direction as the initial conveyance direction. In this case, the switching guide 62 acts on the photosensitive material conveyance path, and moves the leading end of the photosensitive material 36 to the conveyance guide 62.
2 and sent out to a branch conveyance guide 66. Therefore, the leading end of the photosensitive material 36 is sent to the processing section 22 of the processing section unit 2o through the branch conveyance guide 66.

The exposed photosensitive material 36 sent into the processing section 22 is transferred to the developing tank 1.
02, bleached and fixed in a bleaching/fixing tank 104, thoroughly washed with water in washing tanks 106 and 108, and then sent to a drying section 24. After drying, it is transferred to a takeout tray 11.
It is taken out above 0.

Although the copying apparatus according to the present invention is configured as described above, the present invention is not limited to this, and it goes without saying that various improvements and changes in design can be made without departing from the gist of the present invention. It is.

<Effects of the Invention> The copying apparatus of the present invention performs photometry such as the amount and quality of light reflected from an original image during pre-scanning and white balance correction immediately after the imaging lens in the direction in which the exposure light travels. be.

Therefore, in the copying apparatus of the present invention, photometry is performed with the reflected light highly converged, so unlike the conventional copying apparatus in which the photometry device is placed at a position approximately conjugate to the image plane, the photometry device is It is possible to measure most of the luminous flux without using an optical lens.

In addition, since photometry is performed immediately after the reflected light passes through the imaging lens, each color of R, G, and B is mixed, unlike the imaging position, and as described above, the reflected light flux is in a converged state. There is no need to use a diffusion plate, and it is sufficient to use one sensor for each of the R, G, and B colors.

Therefore, in the copying apparatus of the present invention, since it is sufficient to use a small and inexpensive photometric device, the entire exposure device can also be made inexpensive and compact.

Furthermore, by performing photometry at the above position, photometry can be performed with a higher amount of light than when photometry is performed at a position substantially conjugate to the imaging position, so that accurate photometry can be performed.

Therefore, good light control can be performed according to the original image, and a good copy image can be obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of an exposure unit of an embodiment of a copying apparatus according to the present invention. FIG. 2 is a partially enlarged view of the exposure unit shown in FIG. 1. FIG. 3 is a perspective view showing an example of a lens unit suitably used in the copying apparatus of the present invention. FIG. 4 is a schematic cross-sectional view of an example in which the copying apparatus of the present invention is applied to a silver halide photocopying apparatus. Explanation of symbols 1... Exposure section unit, 10... Copying device, 15... Presser plate, 16... Photosensitive material supply section unit, 18... Exposure section unit, 20... Processing section unit , 22... Processing section, 24... Drying section, 26... Reserve liquid storage section, 28... Photosensitive material supply section frame, 30. 32... Magazine, 34. 36... Photosensitive material , 38... Opening/closing lid, 40.100... Bottle, 46... Exposure section, 46a... Exposure position, 54... Glass plate, 56... Pressing plate, 58a, 58b, 60a, 60b"・Transport roller, 64...Switching guide, 80...Document table, 81...Light source unit, 84...Light source, 85...Reflector 87...Slit, 86.88.90. ...Mirror 89...Mirror unit, 92...Imaging lens, 94...Photometry device, 95...Control circuit, 96...Drive circuit, 97...Moving means, 98... Exposure section frame, 102... Developer tank, 104... Bleaching/fixing tank, 106.108... Washing tank, 110... Take-out tray, 130... Document, 200... Lens front group, 202... Lens rear group, 204.208... Color filter plate, 206... Fixed aperture, 210.212... Aperture plate, 214... Variable aperture, 216... Plate cam, 218. 219... Slanted groove, 220.221... Pin, 204a, 208a, 214a... Stepping motor, 204b, 208b, 214b, 204c. 208c, 214c... Gear,

Claims (1)

[Claims] (1) An exposure light source, a plurality of mirrors, an imaging lens,
In a copying apparatus, the copying apparatus includes a light control device for adjusting light quantity and light quality, a photometry device for measuring light quantity and light quality, and a moving means for the photometry device, in which photometry by the photometry device is performed by the image formation. A copying apparatus characterized in that the photometry is carried out immediately after a lens in the direction in which exposure light travels, and the photometry device is movable out of the exposure light beam.