JPH0833584B2 - Image forming device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus using a photosensitive material that is exposed by a light beam transmitted through a document or a light beam reflected by the document.

[Prior Art] 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,
It is carried out by illuminating an original and exposing the photographic light-sensitive material with its reflected light, or exposing the photographic light-sensitive material with light transmitted through a positive or negative film.

Japanese Laid-Open Patent Publication No. 60-32071 discloses an image forming apparatus that uses a light-transmissive original to perform exposure by the transmitted light of the original. According to the apparatus, a photosensitive material is formed in the image form of a color slide. It can be exposed.

An image forming apparatus that exposes a photosensitive material with reflected light from an original and an image forming apparatus that exposes the photosensitive material with transmitted light from the original are known. Then, for example, an image forming apparatus that uses the reflected light of the original document is further provided with an exposure device for the light-transmissive original document to form an image of both the light-reflective original document and the light-transmissive original document on the photosensitive material. You can

Particularly in a device that forms a color image, in order to accurately reproduce the color image of the original, it is necessary to control the optical system device such as changing the exposure amount for each color to adjust the color balance. It is provided with means for detecting the amount and control means for controlling the optical system device according to the detected exposure amount.

[Problems to be Solved by the Invention]

However, in the case of an image forming apparatus capable of handling both the light reflection type original and the light transmission type original 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 Japanese Patent Laid-Open No. 60-32071, the provision of the light quantity detector in the projector means that the means for detecting the light quantity is provided in the case of the image forming apparatus having the reflection type exposure device. It will overlap.

An object of the present invention is to solve the above problems, and it is possible to detect the light amount of both the external exposure device and the internal exposure device, and to easily control two types of exposure devices. To provide.

[Means and Actions for Solving the Problems]

An object of the present invention is to provide an external exposure device that illuminates a light-transmissive original document and an internal exposure device that illuminates a light-reflective original document, and form a latent image on the photosensitive material by at least one of the exposure devices. In an image forming apparatus that obtains an image by developing, a light amount detection device that detects the light amount from the two types of exposure devices is provided, and a control device that controls the optical system device based on the light information obtained by the detection device This is achieved by an image forming apparatus provided with.

For example, a light amount detection device for detecting the light amount from the external exposure device and the internal exposure device is provided near the exposed portion of the photosensitive material,
The light amount can be easily controlled by controlling the optical system device such as the light source or the filter based on the light information of the detection device.

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

Photographic methods for obtaining direct positive images without the need for reversal processing steps or negative films are well known.

The method used to create a positive image using a conventionally known direct positive silver halide photographic light-sensitive material is
Except for special ones, in consideration of practical usefulness, they can be mainly divided into two types.

The first type uses a pre-fogged silver halide emulsion and directly obtains a positive image after development by destroying fog nuclei (latent image) in the exposed area by utilizing solarization or Herschel effect. Is.

The second type uses an internal latent image type silver halide photographic emulsion which has not been fogged in advance, and directly develops a positive image by performing surface development after or after fogging after image exposure. is there.

The above-mentioned internal latent image type silver halide photographic emulsion is a type of silver halide photographic emulsion in which a silver halide grain has a photosensitive nucleus mainly inside and a latent image is mainly formed inside the grain by exposure. Say.

Various techniques have been known so far in this technical field. For example, U.S. Pat.Nos. 2,592,250 and 2,463
6,957, 2,497,875, 2,588,982, 3,3
17,322, 3,761,266, 3,761,276, 3,
796,577 and British Patents 1,151,363 and 1,150,553
No. (No. 1,011,062) Main items are those described in each specification.

By using these known methods, it is possible to produce a photographic light-sensitive material having a relatively high sensitivity as a direct positive type.

The direct positive photographic light-sensitive material can be applied to various color photographic light-sensitive materials.

Representative examples include color reversal films for slides or televisions, color reversal papers, instant color films, and the like. It can also be applied to full-color copiers and color hard copies for storing CRT images. The present invention also provides
It can also be applied to a black-and-white light-sensitive material using a three-color coupler mixture described in "Research Disclosure" magazine No. 17123 (issued in July 1978).

 Further, it can be applied to black and white photographic light-sensitive materials.

The black-and-white (B / W) photographic light-sensitive materials to which the present invention can be applied include B / W direct positive photographic light-sensitive materials (for example, X-rays) described in JP-A Nos. 59-208540 and 60-260039. Sensitive materials, duplicating sensitive materials, micro sensitive materials, typesetting sensitive materials, printing sensitive materials) and the like.

[Embodiment]

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

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

The apparatus body 10 has a paper feed section 12 on the right side and an exposure section 14 on the upper side.
The processing section 16 and the drying section 18 are provided on the left side. In addition, above the exposure unit 16, a projection device for a positive film, which is a light-transmitting type original document described later, is detachably provided. Further, this silver salt photographic color copying machine can be loaded with a pair of upper and lower magazines 20 and 22, and photosensitive materials 24 and 26 are housed in rolls in the inside thereof, respectively. It is designed to be taken out to the paper feeding unit 12. As an example, 24 is the most suitable photosensitive material for copying color photographic originals, and 26 is the most suitable photosensitive material for copying color printed originals.

The photosensitive material 24 or the photosensitive material 26 drawn from the magazines 20 and 22 is sent to the exposure window 28 through the paper feeding unit 12, and the exposure unit 14
The image of the color original 32 on the transparent original table 30 provided above the table or the image projected by the projection device is exposed. This color original 32 holds the original
A color original 32 that is pressed against the original table 30 at 34, illuminated by a light source 38 in a light source unit 36, and reflected by a plurality of mirrors 40
Image is exposed through the optical means 42 to the photosensitive material 24 (26) in the exposure window 28 by opening the shutter 44.

A switching guide 50 is provided at an intermediate portion of the transportation loci of the photosensitive materials 24 and 26 (below the exposure window 28 in FIG. 1) to guide the photosensitive materials 24 and 26 sent vertically downward to the processing section 16 when necessary. You can change the direction. Note that the shutter
In the closed state of 44, the reflected light from the reference white plate and the original image is reflected by the shutter 44, and this is measured by a plurality of (six in the present embodiment) photosensors 43, and the white level value and the image photometric value are measured. The exposure control data is determined by the control device 45 based on the reflection density obtained by (prescan).

The processing unit 16 includes a developing tank 46, a bleach-fixing tank 47, a washing tank 48,
Photosensitive material that is continuously provided with 49 and is developed, bleached, fixed, and washed with a processing solution filled inside these.
24 (26) is sent to the drying section 18. In the developing tank 46, the bleach-fixing tank 47, and the washing tanks 48, 49,
Replenishment tanks 60, 62 and 64 are arranged below the replenishment tanks so that the replenisher can be replenished to each tank as needed.

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

 FIG. 2 is a schematic configuration diagram of the processing unit 16.

The processing unit 16 includes a developing tank 46 for developing the exposed light-sensitive material 24 or 26, a bleach-fixing tank 47 for bleaching and image-fixing the developed light-sensitive material 24 or 26, and a post-image-fixing processing. 2. Washing tanks 48 and 49 for washing the photosensitive material 24 or 26. Each tank 46, 47, 48, 49 is the liquid in the tank and the photosensitive material 2
Shutter 200,202,204,206 to prevent 4 or 26 from being exposed
It has. The processing unit 16 includes a tank 60 for replenishing the developing tank 46 with a developing solution, a tank 160 for replenishing the bleach-fixing tank 47 with a bleaching solution, and a tank 62 for replenishing the bleach-fixing tank 47 with a fixing solution. The washing tanks 48 and 49 are provided with a tank 64 for replenishing the washing liquid (water), and the liquid is appropriately replenished in each tank. Then, the liquid in each tank 60, 62, 64, 166 is pump 171, 173, 1 arranged via filters 170, 172, 174, 176.
Each tank 46, 47, 48, 49 is replenished by 75, 177 as shown by the solid line. Here, the tanks 60, 62, 64 for replenishing the developing solution, the fixing solution, and the water are deformable bags 161, 163,
Each replenisher is stored in 165. The overflow liquid from each tank is then supplied to each tank 6 as shown by the dotted line.
It is designed to be collected between 0,62,64 and bags 161,163,165.

In addition, the tank 64 containing water replenishes the washing tanks 48, 49 with water and, among the conveying roller pairs 180 to 187 for conveying the photosensitive material 24 or 26 over the respective tanks, reference numerals 181, 182, 183, 18 are provided.
Water is supplied to cleaning devices 190 to 198 for cleaning the roller pair shown by 7. The supplied water is supplied to the roller pairs 181, 182, 183, 187 by the cleaning devices 190 to 198 to clean the roller surface.

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

The projection device 100 is detachably attached to the upper part of the document table 30 by a body mounting bracket 110. The projection apparatus 100 is provided with a light source 112 such as a halogen lamp and a carriage 116 that faces the light source 112 and that holds a document such as a reflection plate 114 and a slide film. A lens 118 is arranged on the optical path through which the light from the light source 112 passes through the original document held by the carriage 116, and the diaphragm 1 is placed at a position close to either the front or rear of the lens 118 or a position close to the light source 112.
20 are arranged. In front of the lens 118, a mirror 122 that reflects the transmitted light of the document is provided. On the lower surface of the projection device 100, a concentric Fresnel lens 124 and a focus glass 126 are provided so as to be opposed to the document table 30, and the transmitted light of the document reflected by the mirror 122 is reflected by the Fresnel lens 124. It reaches and forms an image.

The image of the original image formed on the Fresnel lens 124 is slit-scanned by the light source unit 36 in the main body 10, and the light reflected by the mirror 40 exposes the photosensitive material 24 (26). At this time, the light source 38 in the light source unit 36 does not emit light, and the photosensitive material 24 (26) is exposed by the transmitted light from the light source 112 in the projection device 100.

As described above, if the original is a light-reflective type, the light source unit 36 inside the main body 10 is operated, and if the original is a light-transmissive type, the projection device 100 is mounted and operated to operate any original. The photosensitive material 24 (26) can be imagewise exposed.

Prior to the exposure of 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 device 100 is appropriate. First, the light source unit 36 or the projection device
The reference white plate (not shown) is illuminated by 100 and the reflected light is detected by the photo sensor 45. Then, the control device 45 performs control to compare with a previously stored reference value of gray balance and adjust a filter, an aperture, and the like so as to compensate for the difference. Then, the light source 38 or 112 is operated to detect the light amount by the photo sensor 43, and the control device
At 45, the light amount is compared with the set reference value, and the light amount is adjusted to compensate for the difference. By connecting the control device 45 and the light sources 38, 112 to each other, the light amount is automatically adjusted. Further, by providing the projection device 100 with an adjusting device for adjusting the light amount of the light source 112, the projection device 100 Also in the above, the amount of light can be arbitrarily adjusted.

As described above, the photo sensor 43 can detect the light amount of the light source 38 in the light source unit 36 and the light source 112 in the projection device 100, and is an optical device for adjusting the gray balance, density, etc. based on the detected light amount. The system device can be easily controlled.

FIG. 4 is a perspective view of a transmissive light source unit 300 that can be placed on the original table 30 instead of the projection device 100.
A light-transmissive original can be loaded between the transmissive light source unit 300 and the original table 30 to expose the photosensitive material 24 (26) in the image of the original.

The transmissive light source unit 300 includes a rod-shaped light source 302 such as a halogen lamp, a reflection plate 304 for reflecting the light from the light source 302 toward the document table, and a removable ND having a size capable of covering the document. It comprises a filter 306 and a diffusion plate 308 that is superimposed on the lower surface of the filter 306, and the light from the light source 302 passes through the filter 306 and the diffusion plate 308 and further through the document. Then, the light source unit 36 in the main body 10 slit-scans the document table 30, so that the transmitted light reaches the photosensitive material 24 (26) via the mirror 40. At this time as well, the light source 38 in the light source unit 36 does not operate.

〔The invention's effect〕

According to the present invention, a projection device, an external exposure device such as a transmissive light source unit, and a light amount detection device for detecting the amount of light from an internal exposure device that exposes a reflective original are provided, and the light source is based on the optical information of the detection device. It is possible to easily control the adjustment of the light amount by controlling the optical system device such as the diaphragm, the filter, and the like.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a silver salt photographic color copying machine to which the present invention is applied, FIG. 2 is a schematic configuration diagram of a processing unit, FIG. 3 is a perspective view of a projection device, and FIG. It is a perspective view of a unit. Reference numeral in the figure: 10 ... Main body, 12 ... Paper feeding section 14 ... Exposure section, 16 ... Processing section 18 ... Drying section 20,22 …… Magazine 24,26 …… Photosensitive material 28 …… Exposure window, 30 …… Original plate 32 …… Original, 34 …… Original pressing 36 …… Light source unit, 38 …… Light source 40 …… Mirror, 42 …… Optical means 43 …… Photo sensor, 44 …… Shutter 45 …… Photometer , 46 …… Developer tank 47 …… Bleaching fixing tank, 48,49 …… Washing tank 50 …… Switching guide, 54 …… Tray tray 60,62,64,166 …… Tank 161,163,165 …… Bag 170,172,174,176 …… Filter 171,173,175,177 …… Pumps 180 to 187 Transport rollers 190 to 198 Cleaning means 200 to 206 ...... Shutter 100 ...... Projector, 110 ...... Bracket 112 ...... Light source, 114 ...... Reflector 116 ...... Carriage, 118 ...... Lens 120 …… Aperture, 122 …… Mirror 124 …… Fresnel lens 126 …… Focus glass 300 …… Transmission light source unit 302 …… Light source, 304 …… Anti Fire plate 306 …… ND filter 308 …… Diffuser

Claims (1)

[Claims] 1. An external exposure device for illuminating a light-transmissive original and an internal exposure device for illuminating a light-reflective original, wherein at least one of the exposure devices forms a latent image on a photosensitive material and develops the photosensitive material. In the image forming apparatus that obtains an image, a light amount detecting device that detects the light amount from the two types of exposure devices is provided, and a control device that controls the optical system device based on the light information obtained by the detecting device is provided. Image forming device.