JPH03216636A - Exposing device - Google Patents

Abstract

PURPOSE:To miniaturize an exposing device by synchronously feeding a light transmission type original and a photosensitive material and performing slit- exposure to the photosensitive material. CONSTITUTION:The feeding speeds of the original 71 and the photosensitive material 26 are adjusted so that the material 26 may be fed faster than the original 71 by the amount of enlarging magnification at the time of exposing the photosensitive material. At this time, the original 71 and the material 26 are synchronously fed so that the slit-scanning starting end and the slit-scanning finishing end of the original 71 may coincide with the slit-exposure starting end and the slit-exposure finishing end of the material 26. Thus, a means for moving an optical system in the case of performing surface exposure is not necessitated and the exposing device can be miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an exposure apparatus that exposes a photosensitive material to light transmitted through a light-transmissive original.

[Conventional technology]

As a device that projects and exposes a light-transmitting original containing a negative color image or a positive color direct image onto a photographic light-sensitive material in the form of an image.
There is an apparatus that illuminates a document with a point light source located on the opposite side of the document from the photosensitive material, and exposes the photosensitive material with the light transmitted through the document.

This type of exposure device has a configuration in which a point light source illuminates the entire surface of the document, and the light that has passed through the document simultaneously exposes the entire exposed surface of the photosensitive material. A filter is placed on the optical path to adjust the color of the light.

[Problem to be solved by the invention]

Devices that expose photosensitive materials using such a surface exposure method have the advantage of requiring only one exposure, but in order to obtain a homogeneous and clear image, it is necessary to uniformly illuminate a wide area of the document. For this purpose, means such as an illumination system, an imaging optical system, and a filter for color adjustment are required, and the exposure device becomes large, and it is difficult to completely eliminate color unevenness and density unevenness in the image obtained on the photosensitive material. was quite difficult.

An object of the present invention is to solve the above-mentioned problems, and by using a simple and compact configuration, it is possible to expose an image in the form of a light-transmissive manuscript onto a bright light material without causing color unevenness or density unevenness. The purpose of the present invention is to provide an exposure apparatus that can be used.

[Means and effects for solving the problem] The above-mentioned object of the present invention is to provide an exposure device that exposes a bright light material with light transmitted through a light-transmissive original, which includes a rod-shaped light source and a light source that collects light from the light source. A light reflecting plate that emits light, a filter that adjusts the color tone of the light from the light source, a diffusion means that diffuses the light that has passed through the filter and guides it to the document, and a slit that is parallel to the rod-shaped light source to reflect the light that has passed through the document. This is achieved by an exposure apparatus equipped with a slit member that guides the photosensitive material toward the photosensitive material, and a conveying means that synchronously conveys the document and the photosensitive material.

In other words, since the light-transmissive original and the photosensitive material are transported synchronously and the photosensitive material is slit-exposed, there is no need for a means to move the optical system, and the exposure device becomes larger like a surface exposure device. There's nothing to do. Further, by disposing a filter on the optical path of the light from the light source before it reaches the document, it is easy to adjust the color of the light. Further, since the light source is rod-shaped corresponding to the slit, the amount of light passing through the slit can be made uniform across the slit direction, and the photosensitive material can be exposed without causing color unevenness or density unevenness.

The photosensitive material used in the present invention may be, for example, a negative photosensitive material or a direct positive photosensitive material, as long as it can obtain an image by exposing an image of a light-transmissive original. , it can be anything.

[Embodiment]

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

FIG. 1 is a schematic diagram of a silver halide photographic color copying machine equipped with an embodiment of the present invention.

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. In addition, a pair of magazines 20 and 22 can be loaded into this silver-salt photographic color copying machine at the top and bottom, and photosensitive materials 24 and 26 are housed inside these in the form of rolls, and are ejected from the tip. The paper is taken out to the paper feed section 12. As an example, 24 is a photosensitive material most suitable for copying a positive color photographic original, and 26 is a photosensitive material most suitable for copying a negative color film original. In addition, two types of photosensitive materials 24. Since the configuration for processing the two photosensitive materials 26 is the same, the configuration of the copying machine will be described below based on the processing of one of the photosensitive materials 24.

The photosensitive material 24 pulled out from the magazine 20 is fed to the paper feed section 1.
2 to the exposure window 28 , and is placed on a transparent document table 30 provided above the exposure section 14 .
image is exposed. This color original 32 is pressed onto the original table 30 by the original holder 34, is illuminated by a light source 38 in the light source unit 36, and is illuminated by a plurality of mirrors 4.
The image of the color original 32 reflected at 0 passes through the optical means 42 and is exposed to the bright light material 24 in the exposure window 28 by opening the shutter 44.

Note that when the shank 44 is in the closed state, the original image is reflected by the mirror 44 and is incident on the image sensor 43, and the exposure correction conditions are determined by the control device 45.

Further, above the exposure section 14, a projection exposure section 70 is provided for exposing the photosensitive material 26 with an image of a small light-transmissive original such as a 35 mm negative film. The image light generated by the transmitted light that illuminates the original 71 with the light source 72 in the projection exposure section 70 is similarly reflected by a plurality of mirrors 40, passes through the optical means 42, and is exposed to the photosensitive material 24 in the exposure window 28 by opening the shutter 44. It is designed to be imaged into

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 24 is developed, bleach-fixed, and washed with the processing liquid filled into these tanks. is sent to the drying section on the 1st. Each processing liquid is appropriately replenished from replenishment tanks 60, 62, and 64.

The drying section 18 dries the photosensitive material 24 after washing with water and sends it onto the take-out tray 54 .

FIG. 2 is a block diagram of a projection exposure section 70 for exposing a negative film photosensitive material $426. This projection exposure section 70
In this example, a 35III1 size photographic negative film is used as the original 71, and the long side direction of the negative film is the main scanning direction, and the short side direction is the sub scanning direction.

The projection exposure unit 70 includes a bar-shaped light source 72 that is longer than the long side of the light-transmissive original 71, a long-focus reflector 73 with an elliptical arc cross section provided on the back side of the bar-shaped light source 72, and a color adjustment of the light from the bar-shaped light source 72. filter unit 74 and rod-shaped light source 7
a diffusion means 75 for diffusing light from 2, and a light-transmissive original 7;
1, a slit member 77 provided on the photosensitive material side of the document table 76, and a lens unit 78 that magnifies the image light of the document 71 and forms an image on the photosensitive material 26.
and an aperture 79 that adjusts the amount of light. Rod-shaped light source 72
is located at the first focal point of the long focal length reflector 73, and the upper end of the diffusing means 75 is located at the second focal point of the long focal length reflector 73.

Note that in this embodiment, a reflection mirror 80 is provided between the filter unit 74 and the diffusion means 75, and the projection exposure section 70
The vertical height has been reduced. Furthermore, a heat shielding filter 81 is provided between the rod-shaped light source 72 and the filter unit 74, and the filter unit. , a negative original balance filter 82 and an ND filter 8 are provided between the gate 74 and the diffusion means 75.
3 is provided so as to be able to appear and retract within the optical path.

The diffusing means 75 has a substantially prismatic shape, and its inner surface is a reflective surface. Diffusion plates 84 and 85 are provided at the light source side end and the document side end of the diffusion means 75, and the diffusion plate 85 at the document side end is large enough to cover the slit 86 of the slit member 77. It is located close to the original 71.

Note that one or more diffusion plates may be used in place of the illustrated diffusion means 75 as long as the light intensity loss from the rod-shaped light source 72 does not affect the illumination.

The slit member 77 is made of a light-shielding material and has a diameter of 2.5 mm.
A slit 86 having a length equal to the long side of the document 71 is provided in the gap.

The document table 76 is movable in the sub-scanning direction by a pulse motor PM, and the document 71 and the photosensitive material 26 on the document table 76 are synchronously conveyed with the conveyance speed adjusted according to the magnification. That is, the enlargement of the original 71 in the main scanning direction is performed by the lens unit 78, the lens unit 42 in the main body, and the mirror 40.
Enlargement in the sub-scanning direction is performed by adjusting the conveying speed of the document 71 or the conveying speed of the photosensitive material 26. Enlargement in the sub-scanning direction is determined by the relative speed of conveyance speed of the original 71 and the photosensitive material 26, and for example, when the enlargement rate is 10
If the transport speed of the original 71 and the photosensitive material 26 is twice that of the original 71, the original 71 and the photosensitive material 26 are
is transported. Note that the magnification factor in this embodiment is 2.
．． It is set to 5 to 10 times.

Each of the filters 74a-c of the filter unit 74, the negative original balance filter 82, the ND filter 83, the original table 76, the lens unit 78, and the diaphragm 79 are each driven by a pulse motor PM in the direction shown by the arrow.

Next, the operation of the projection exposure section 70 will be explained.

In the filter unit 74, the light from the rod-shaped light source 72 passes through a yellow filter 74a, a magenta filter 74b,
Color adjustment is performed by changing the insertion amount of the cyan filter 74c into the optical path. The color-adjusted light is reflected by a reflecting mirror 80.
The light is reflected toward the diffusion means 75 by. Diffusion means 75
The color of the light incident thereon is adjusted by a negative original balance filter 82 and an ND filter 83 as necessary. The light incident on the diffusing means 75 is diffused by the diffusing plate 84 at the end on the light source side, then reflected by the internal reflective surface, and further diffused by the diffusing plate 85 at the end on the document side, so that the light is uniformly distributed without loss of light quantity. The light becomes diffused.

The diffused light diffused by the diffusion means 75 illuminates the original 71 in the form of a slit, and the light passes through the original 71 in the form of an image. Part of the light that has passed through the original 71 is blocked by the slit member 77, and only the light that has passed through the slit 86 passes through the lens unit 78, the aperture 79, and the mirror 40, and then reaches the image sensor 43.
Or it reaches the photosensitive material 26.

Prior to exposing the photosensitive material 26, image light from the original 71 is incident on the image sensor 43. Based on the image light incident on the image sensor 43, a filter unit 74,
Negative original balance filter 82, ND filter 83,
The color adjustment of the image light and the light t adjustment are performed by controlling the operation of the aperture 79 and the like.

When exposing the photosensitive material, the original 71 and the photosensitive material 26 are transported so that the photosensitive material 26 is transported faster than the original 7 by the magnification factor.
The transport speed is adjusted. At this time, the original 71 and the photosensitive material 26 are transported synchronously so that the slit scanning start end and the slit scanning end of the original 71 coincide with the slit exposure start end and the slit exposure end of the photosensitive material 26. .

A filter unit 74 that adjusts the color of light for exposing the photosensitive material 26 is provided between the rod-shaped light source 72 and the original 71, and adjusts the color of the light from the rod-shaped light source 72, thereby controlling the amount of movement of the filter. It has a simple configuration and is easy to operate.

Further, since the rod-shaped light source 72 and the slit 86 have the same longitudinal direction and are parallel to each other, the amount of light passing through the slit 86 is uniform over the longitudinal direction.

Therefore, the amount of light reaching the angry light material 26 is 86
The concentration is uniform along the longitudinal direction.

FIG. 3 is a configuration diagram of a modified example of the projection exposure section 70.

This projection exposure section 70 has a partially different configuration from the projection exposure section 70 shown in FIG. 2, and the same reference numerals indicate the same parts in FIGS. 2 and 3. The different parts of the configuration will be explained below.

This projection exposure section 70 is arranged so that the end of the reflective surface of a long focus reflector 73 having an elliptical arc cross section and which is provided on the back side of the rod-shaped light source 72 is located in the same plane as the second focal point of the reflective surface having an elliptical arc cross section. It has been extended. Note that the rod-shaped light source 72 is located at the first focal point of the reflective surface having an elliptical arc cross section. Furthermore,
The present projection exposure section 70 has a configuration in which the reflecting mirror 80 in FIG. 2 is omitted, and a diffusion plate 84 of the diffusion means 75 is connected to the open end of the long focus reflector 73.

Although the aperture 79 is located on the document side of the lens unit 78, the aperture 79 may be provided on the photosensitive material side of the lens unit 78.

The light from the rod-shaped light source 72 passes through an optical path covered by a long-focus reflector 73 until it reaches the upper end of the diffusion means 75, that is, the second focal point.Moreover, since the configuration is such that the reflecting mirror 80 in FIG. 2 is omitted, the rod-shaped light source The light from 72 effectively reaches the diffusion means 75, and loss of light amount can be prevented.

〔Effect of the invention〕

According to the present invention, since the light-transmissive original and the photosensitive material are synchronously conveyed and the photosensitive material is slit-exposed,
A means for moving the optical system is not required, and the exposure apparatus does not become larger unlike a surface exposure apparatus. Further, by disposing a filter on the optical path of the light from the light source before it reaches the document, it is easy to adjust the color of the light. Furthermore, since the light source is rod-shaped and corresponds to the slit, the amount of light passing through the slit is uniform in the direction of the slit, and the photosensitive material can be exposed without causing color unevenness or density unevenness.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a silver halide photographic color copying machine to which the present invention is applied, FIG. 2 is a configuration diagram of a projection exposure section, and FIG. 3 is a configuration diagram of a modified example of the projection exposure section. Codes in the figure: 10-・One main body 12・-・Paper feed section 14-
-Exposure section 16--1 processing section 18--1 drying section 46--Developing tank 47--1 bleach-fixing tank 48.49--Washing tank 60, 62, 64,-
-1 Tank 70...1 projection exposure section 71-111 Transmissive original 72...1 bar-shaped light source 73--1 long focus reflector 74...-Filter unit 75--1 diffusion means 76- Document table 77-・-
Slit member 7B--Lens unit 19--One aperture so--One reflecting mirror 81--One Heat shield filter 82-One Balance filter for negative original 8 3-N
D filter 84.85--11 Diffusion plate 86-Slit No. 3 Fig. 71

Claims (1)

[Claims] An exposure device that exposes a photosensitive material to light that has passed through a light-transmitting original includes a rod-shaped light source, a reflector that collects the light from the light source, a filter that adjusts the color tone of the light from the light source, and a light that passes through the filter. a slit member that has a slit parallel to the rod-shaped light source and guides the light that has passed through the original toward the photosensitive material; and a conveyor that synchronously transports the original and the photosensitive material. An exposure apparatus comprising means.