JPH0247643A - Image forming device - Google Patents

Abstract

PURPOSE:To control light quantity by providing a light quantity detection device which detects the light quantity from an outside exposing device and an inside exposing device for exposing a reflection type original and controlling an optical system device such as a light source, a diaphragm and a filter, etc., based on the optical information from the detection device. CONSTITUTION:Preceding the exposure of photosensitive materials 24 and 26, whether the light quantity of the light source 38 of a light source unit 36 or the light source of a projecting device is proper or not is detected. By lighting a reference white board with the light source unit 36 or the projecting device, detecting the reflected light therefrom with a photosensor 43 and comparing the light quantity with the previously stored reference value of gray balance by means of a controller 45, the filter and the diaphragm, etc., are controlled to be adjusted so as to compensate the difference. Then, the light source 38, etc., is actuated and the light quantity is detected with the photosensor 43. The light quantity is compared with the set reference value by the controller 45 and adjusted so as to compensate the difference. Thus, the light quantity is automatically adjusted and also the light quantity can be optionally adjusted in the projecting device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming apparatus that uses a photosensitive material that is exposed to light that has passed through an original or reflected from the original.

[Conventional technology]

Generally, in an image forming apparatus using a silver halide photographic light-sensitive material, in order to form a latent image on the photographic light-sensitive material, an original is illuminated and the photographic light-sensitive material is exposed to the reflected light, or a positive or negative film is exposed. This is done by exposing the photographic material to light that has passed through it.

Japanese Unexamined Patent Publication No. 60-32071 discloses an image forming apparatus that uses a light-transmissive original and performs exposure using the transmitted light of the original. According to this apparatus, a photosensitive material is formed in the image form of a color slide. Can be exposed to light.

2. Description of the Related Art Image forming apparatuses that expose a photosensitive material to light reflected from an original and image forming apparatuses that expose a photosensitive material to light transmitted from an original are well known. For example, by further providing an exposure device for light-transmitting originals in an image forming apparatus that uses reflected light from the original, images of both light-reflecting originals and light-transmitting originals can be formed on photosensitive materials. Can be done.

In particular, in devices that form color images, in order to accurately reproduce the color image of the original, it is necessary to control the optical system and adjust the color balance by changing the exposure amount for each color. The apparatus includes a means for detecting the amount of exposure and a control means for controlling the optical system according to the detected amount of exposure.

[Problem to be solved by the invention]

However, in the case of an image forming apparatus that can handle both light-reflecting type originals and light-transmitting type originals as described above, it is necessary to provide a light amount detection device and a control device for each of the two types of exposure devices.

Further, as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 60-32071, providing a light amount detector in the projector means that in the case of an image forming apparatus equipped with a reflective exposure device, there is no means for detecting the amount of light. It will be duplicated.

An object of the present invention is to solve the above problems, and is an image forming apparatus configured to be able to detect the amount of light from both an external exposure device and an internal exposure device, and to easily control two types of exposure devices. Our goal is to provide the following.

[Means and Effects for Solving the Problems] The above object of the present invention is to provide an external exposure device for illuminating a light-transmitting original and an internal exposure device for illuminating a light-reflecting original; In an image forming apparatus that forms a latent image on a material and obtains an image by developing the photosensitive material, a light amount detection device that detects the amount of light from the two types of exposure devices is provided, and optical information obtained by the detection device is provided. This is achieved by an image forming apparatus including a control device that controls an optical system based on the following.

For example, a light amount detection device that detects the amount of light from an external exposure device and an internal exposure device is provided near the photosensitive material exposure section, and optical system devices such as a light source or a filter are controlled based on the light information of the detection device. , the light amount can be easily controlled.

The light-sensitive materials used in the present invention include, for example, negative photographic materials and direct positive photographic materials.

Photographic methods that provide direct positive images without the need for reversal processing steps or negative film are well known.

Excluding special methods, the methods used to create positive images using conventionally known direct positive silver halide photographic materials can be mainly divided into two types, considering their practical usefulness. can.

The first type uses a silver halide emulsion that has been fogged in advance and uses solarization or the Burschel effect to destroy fog nuclei (latent images) in exposed areas, thereby obtaining a positive image directly from the developing machine. It is.

The second type uses an internal latent image type silver halide photographic emulsion that has not been fogged in advance, and directly obtains a positive image by performing surface development after or while performing fogging treatment after image exposure. be.

The above-mentioned internal latent image type silver halide photographic emulsion is a type of silver halide photographic emulsion that has photosensitive nuclei mainly inside the silver halide grains and a latent image is mainly formed inside the grains upon exposure. means.

Various techniques are known to date in this technical field. For example, U.S. Patent No. 2.592.250, U.S. Pat.
Same No. 2,588.982, Same No. 3,317.322, Same No. 3,761,266, Same No. 3,761.276
No. 3,796.577 and British Patent No. 1,15
1.363, 1.150,553 (1.0
No. 11.062) The main ones are those described in each specification, etc.

By using these known methods, it is possible to produce direct positive type photographic materials with relatively high sensitivity.

The above-mentioned direct positive type photographic material can be applied to various color photographic materials.

For example, representative examples include color reversal film for slides or television, color reversal paper, and instant color film. It can also be applied to full-color copying machines and color hard copies for storing images on CRTs. The present invention also provides
"Research Disclosure" Magazine 17123
It can also be applied to black-and-white light-sensitive materials using a mixture of three color couplers, such as those described in J.D. (published in July 1978).

Furthermore, it can also be applied to black and white photographic materials.

Examples of black and white (B/W) photographic materials to which the present invention can be applied include JP-A-59-208540 and JP-A-60-26003.
There are B/W direct positive photographic light-sensitive materials (for example, X-ray light-sensitive materials, duplex light-sensitive materials, micro-sensitive materials, phototypesetting light-sensitive materials, and printing light-sensitive materials) described in Japanese Patent No. 9.

[Embodiment]

Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a schematic diagram of a silver salt photographic color copying machine.

The apparatus main body 10 is provided with a paper feed section 12 on the right side, an exposure section 14 and a processing section 16 above, and a drying section 18 on the left side. Further, above the exposure section 16, a projection device for a positive film, which is a light-transmissive original, which will be described later, is removably provided. In addition, a pair of magazines 20 and 22 can be loaded into this silver-halide photographic color copying machine at the top and bottom, and photosensitive materials 24 and 26 are housed in rolls inside these magazines, and are loaded from the tip. The paper is taken out to the paper feed section 12. - For example, 24 is a photosensitive material most suitable for copying color photographic originals, and 26 is a photosensitive material most suitable for copying color printed originals.

The photosensitive material 24 or 26 pulled out from the magazine 20.22 is sent through the paper feed section 12 to the exposure window 28, and the image of the color original 32 on the transparent document table 30 provided above the exposure section 14 is captured. Alternatively, an image projected by a projection device is exposed. The color original 32 is pressed onto the original table 30 by the original presser 34, illuminated by a light source 38 in the light source unit 36, and the image of the color original 32 reflected by the plurality of mirrors 40 is transferred to the optical means 42.
When the shutter 44 is opened, the photosensitive material 24 (26) in the exposure window 28 is exposed.

A switching guide 50 is provided in the middle of the conveyance trajectory of the photosensitive material 24, 26 (below the exposure window 28 in FIG. 1), and the photosensitive material 24, 26 sent vertically downward is transferred to the processing section 16 when necessary.
It is now possible to change direction to guide you. Note that when the shutter 44 is in the closed state, the reflected light from the reference white plate and the original image is reflected by the shutter 44, and is photometered by a plurality of (six in this embodiment) photosensors 43, and the white level value and Exposure control data is determined by the control device 45 based on the reflection density obtained from the image photometric value (prescan).

The processing section 16 is successively provided with a developing tank 46, a bleach-fixing tank 47, and a washing tank 48, 49, and the photosensitive material is developed, bleached, fixed, and washed with the processing liquid filled into these tanks. 24 (26) are sent to the drying section 18. In addition, the developer tank 46, the bleach-fix tank 47,
The water washing tanks 48, 49 have replenishment tanks 60.6 below them.
2.64 is installed, so that various liquids can be replenished with liquid as needed.

In the drying section 18, the photosensitive material 24 (26) after being washed with water is dried and sent onto the take-out tray 54.

FIG. 2 is a schematic diagram of the processing section 16. As shown in FIG.

The processing section 16 includes a developing tank 46 for developing the exposed photosensitive material 24 or 26, and a bleach-fixing tank 4 for performing bleaching and image fixing on the developed photosensitive material 24 or 26.
7, and washing tanks 48 and 49 for washing the photosensitive material 24 or 26 after image fixing processing. Various 46, 47, 48
．． 49 is a shutter 200, 202, 204, 206 to prevent the liquid in the bath and the photosensitive material 24 or 26 from being exposed.
It is equipped with The processing section 16 also includes a tank 601 for replenishing the developer tank 46 with a developer, a tank 166 for replenishing the bleach-fix tank 47 with bleach solution, and a tank 601 for replenishing the bleach-fix tank 47 with a bleach solution.
tank 62 for replenishing the fixing solution, washing tank 4g, 4
．． 9 is provided with a tank 64 for replenishing the washing liquid (water), and each tank is appropriately replenished with the liquid. And each tank 60
．． The liquid in 62, 64, 166 is filtered through filters 170, 17
Pumps 171°173.175.177 arranged through 2°174.176 pump various types of 4 as shown by solid lines.
Replenished on 6,47,48.49. Here, the developer,
Tanks 60, 62, and 64 for replenishing fixer and water contain each replenisher in deformable bags 161, 163, and 165 made of vinyl or the like. Then, the overflow liquid from each type is transferred to each tank 60.6 as shown by the dotted line.
2.64 and bags 161, 163, and 165.

In addition, the tank 64 containing water replenishes water to the washing tanks 48 and 49, and is connected to transport roller pairs 181, 182, 183, and 187 among transport roller pairs 180 to 187 that transport the photosensitive material 24 or 26 over various areas. Water is supplied to cleaning devices 190 to 198 for cleaning the roller pairs shown. The supplied water is passed through the cleaning devices 190 to 198 to the roller pair 1.
81, 182, 183, 187 to clean the roller surface.

FIG. 3 is a perspective view of the projection device.

The projector 100 is removably attached to the upper part of the document table 30 using a bracket 110 for attaching the main body. The projection device 100 is provided with a light source 112 such as a halogen lamp, a reflection plate 114 facing the light source 112, and a carriage 116 that holds an original such as a slide film. A lens 118 is arranged on the optical path through which the light from the light source 112 passes through the document held by the carriage 116, and an aperture 120 is arranged at a position close to either the front or back of the lens 118 or at a position close to the light source 112. has been done. A mirror 122 is provided in front of the lens 118 to reflect the light transmitted from the original.

A responsive Fresnel lens 124 and a focusing glass 126 are superimposed on the lower surface of the projection device 100 so as to face the document table 30 , and the transmitted light from the document reflected by the mirror 122 is transmitted through the Fresnel lens 124 reaches and forms an image.

The image of the document formed on the Fresnel lens 124 is slit-scanned by the light source unit 36 in the main body IO, and
The light reflected by the mirror 40 causes the photosensitive material 24 (2
6) is exposed. At this time, the light source 38 in the light source unit 36 does not emit light, and the photosensitive material 24 (26)
00 is exposed by transmitted light from the light source 112.

As described above, if the document is a light reflection type, the light source unit 36 inside the main body 10 is activated, and if the document is a light transmission type, the projection device 100 is attached and activated, so that any document can be projected. The photosensitive material 24 (26) can be imagewise exposed.

Note that, prior to exposing the photosensitive material 24 (26), it is detected whether the light amount of the light source 38 of the light source unit 36 or the light source 112 of the projection apparatus 100 is appropriate.

First, a reference white plate (not shown) is illuminated by the light source unit 36 or the projection device 100, and the reflected light is detected by the photosensor 45. Then, the control device 45 performs control to compare the gray balance with a pre-stored gray balance reference value and adjust the filter, aperture, etc. to compensate for the difference.

Next, the light source 38 or 112 is activated to illuminate the photosensor 4.
3 detects the light amount, and the control device 45 compares the light amount with a set reference value, and adjusts the light amount to compensate for the difference. By connecting the control device 45 and the light source 38° 112, the amount of light can be adjusted automatically, and by providing the projection device 100 with an adjustment device for adjusting the amount of light from the light source 112, projection can be performed automatically. The amount of light can be adjusted arbitrarily in the device 100 as well.

As described above, the photosensor 43 can detect the amount of light from the light source 38 in the light source unit 36 and the light source 112 in the projection device 100, and based on the detected amount of light, the photosensor 43 uses an optical sensor to adjust gray balance, density, etc. System equipment can be easily controlled.

FIG. 4 is a perspective view of a transmitted light source unit 300 that can be placed on the document table 30 instead of the projection device 100. A transmissive original is loaded between the transmissive light source unit 300 and the original table 30, and an image of the original is printed on the photosensitive material 2.
4 (26) can be exposed.

The transmitted light source unit 300 includes a rod-shaped light source 302 such as a halogen lamp, a reflector plate 304 for reflecting light from the light source 302 toward the document table, and a removable and replaceable ND that is large enough to cover the document. Consisting of a filter 306 and a diffusion plate 308 superimposed on the lower surface of the filter 306,
The light from the light source 302 passes through a filter 306 and a diffuser plate 308.
Transparent, and then the original. And the main body 10
When the light source unit 36 inside scans the original platen 30 through the slit, the transmitted light passes through the mirror 40 onto the photosensitive material 24.
(26) is reached. In addition, at this time as well, the light source unit 36
The light source 38 inside is not activated.

〔Effect of the invention〕

According to the present invention, a light amount detection device that detects the amount of light from a projection device, an external exposure device such as a transmitted light source unit, and an internal exposure device that exposes a reflective original is provided, and the light source is detected based on the light information of the detection device. By controlling optical system devices such as a diaphragm, a diaphragm, and a filter, the amount of light can be easily adjusted.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view showing a silver halide photographic color copying machine to which the present invention is applied, Fig. 2 is a schematic configuration diagram of a processing section, Fig. 3 is a perspective view of a projection device, and Fig. 4 is a transmitted light source. It is a perspective view of a unit. Symbols in the figure: 10 Main body 12 Paper feed section 14 Exposure section 16 Processing section 18 Drying section 20.22 Magazine 24.26 Photosensitive material 28 Exposure window 30 Document table 32 Document 34 Document holder 36 Light source unit 38 Light source 40 Mirror 42 Optical means 43 Photo sensor 44 Shutter 45 Photometer 46
Developer tank 47 Bleach-fix tank 48.49 Washing tank 50 Switching guide 54 Take-out tray 60.62, 64, 1
66 Tank 161, 163.165 Bag 170.172, 174, 176 Filter 171.
173,175.177 Pumps 180-187 Conveying rollers 190-198 Cleaning means 200-206 Shutter 100 Projection device 110 112 Light source 114 116 Carriage 118 120 Aperture 122 124 Fresnel lens 126 Focusing glass 300 Transmitted light source unit 302 Light source 304 306 ND filter 308 Diffusion plate Bracket Reflection plate Lens Mirror Reflection plate 4 Figure 3ω

Claims (1)

[Claims] An external exposure device that illuminates a light-transmissive original and an internal exposure device that illuminates a light-reflective original are provided, and at least one of the exposure devices forms a latent image on a photosensitive material, and the image is obtained by developing the photosensitive material. An image forming apparatus comprising: a light amount detection device that detects the amount of light from the two types of exposure devices; and a control device that controls an optical system device based on light information obtained by the detection device.