JPH08248538A - Printer - Google Patents

Abstract

PURPOSE: To form a print having excellent image quality by using small number of light sources. CONSTITUTION: A reflection original is mounted on an original mount base 22 in a state where a light source shutter is closed, and the original mount base 22 is positioned at a vertical position. By rotating a dial 16, the positions of three filters C, M and Y are respectively and independently adjusted. By opening the light source shutter in such a state, light radiated from a lamp 10 is controlled by a color correction filter 12 and diffused by a mirror box 18, then the reflection original on the original mount base 22 is irradiated with the diffused light. The vicinity of the lower side part of the reflection original is mainly illuminated with the diffused light from the mirror box 18, and the vicinities of the upper side and the right and left sides thereof are mainly illuminated by reflection mirrors 30, 32 and 34 reflecting the diffused light from the mirror box 18, so that the reflection original is nearly uniformly illuminated. By opening/closing a black shutter 27, the image of the reflection original is printed on photographic paper 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer, and more particularly to a printer for printing a reflection original on reversal type printing paper.

[0002]

2. Description of the Related Art A conventional printer for printing a reflection original on a reversal type printing paper, a so-called positive-positive printer, has a large number of light sources (usually two) for illuminating the reflection original substantially uniformly and an image of the reflection original for reversing type. The lens for forming an image on the photographic printing paper and the filter device for color correction interposed between the photographic printing paper and the lens.

[0003]

However, in a conventional printer for printing a reflection original, a filter device for color correction is interposed between the printing paper and the lens, that is, the lens system, so that the image quality of the print is deteriorated. However, if dust is attached to the filter, the image quality will be further reduced.
There was a problem. Further, since a large number of light sources are required, there is a problem that the device becomes large.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a printer capable of producing a print with good image quality by using a small number of light sources.

[0005]

In order to achieve the above object, the present invention provides at least one light source, a diffusing device for diffusing light emitted from the light source to illuminate a reflective original, the light source and the light source. A filter device that is arranged so that it can enter and leave the optical path between the diffusing device, a reflecting device that reflects light rays emitted from the diffusing device and illuminates a low-illumination portion of the reflecting document, and an illuminated reflecting document. And a lens for forming an image of the image on a photographic paper.

[0006]

According to the present invention, the light emitted from at least one light source is diffused by the diffusing device and applied to the reflection original. Further, the reflection device illuminates a portion of the reflection original having low illuminance. As described above, in the present invention, since the reflecting device is used, it is possible to illuminate the reflecting original substantially uniformly with a small number of light sources. Further, since the filter device of the present invention is provided not in the lens system but in the light source system, it does not affect the image quality of the print, and therefore a good quality print can be produced.

[0007]

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

As shown in FIGS. 1 and 2, a lamp 10 as a light source is arranged so that the irradiation direction is substantially horizontal. On the light irradiation side of the lamp 10, a color correction filter (CC filter) which is composed of three filters C, M, and Y, and which is a filter device for correcting the light source color so that each filter can enter and leave the optical path. ) 12 are arranged. The color correction filter 12 is connected to a dial 16 via an operation rod 14, and the positions of the three filters C, M, and Y are independently adjusted by rotating the dial 16 automatically or manually. You can A mirror box 18 is arranged on the light transmission side of the color correction filter 12.

The mirror box 18 is formed in a substantially rectangular tube shape with the reflecting surfaces of a reflecting plate such as a mirror or a white plate facing each other, and has a bottom surface 18A inclined by about 45 ° with respect to the optical axis.
Is provided. A rectangular opening 18B is provided on the side of the bottom surface 18A of the side of the mirror box 18 on the lamp 10 side. The upper part of the mirror box 18 is closed by a diffuser 18C. Therefore, when light enters through the opening 18B of the mirror box 18,
The diffuser 18C is reflected by the bottom surface 18A and the inner surface.
The diffused light diffused by is irradiated.

Color correction filter 12 and mirror box 18
A light source shutter 20 for blocking the light emitted from the lamp 10 from entering the mirror box 18 when necessary is disposed between the opening 18B and the opening 18B.

On the diffused light irradiation side of the mirror box 18,
A document mounting table 22 having a lower end hinged to the printer body is arranged. This document mounting table 22 can swing from a horizontal position around the lower end portion to a vertical position shown in FIGS. 1 and 2, and at the horizontal position, the reflection document is mounted on the document mounting table 22.
After mounting the reflection original on the original mounting table 22,
Positioned in a vertical position. Attach the reflection document to the document mount 2
In order to attach the sheet to the sheet 2, a method such as attaching a transparent glass to the original mounting table 22 and sandwiching it with the transparent glass, adsorbing a reflective original with a vacuum, and adhesively fixing with a weak adhesive material can be used.

A reflection mirror 24 is arranged on the light reflection side of the document mounting table 22 from the reflection document, and a reflection document is formed on the light reflection side of the reflection mirror 24 so as to form an angle of about 45 ° with the optical axis. A lens 26 for forming an image of the image on a reversal type photographic paper 28 is arranged. A black shutter 27 is arranged between the lens 26 and the printing paper 28.

In the vicinity of the document mounting table 22, reflection mirrors 30, 32, 34 for illuminating a low-illuminance portion of the reflection document.
Is arranged. The reflection mirror 30 is arranged with its reflection surface facing the original mount 22 so that the vicinity of the upper side of the original mount 22 is illuminated by the reflected light, and the reflection mirrors 32 and 34 of the original mount 22 are reflected by the reflected light. The reflection surface is arranged so as to face the document mount 22 so as to illuminate the vicinity of the left and right sides. By arranging the plurality of reflection mirrors in this manner, the reflection original attached to the original attachment table 22 can be illuminated substantially uniformly. A reflective plate such as a white plate may be used instead of the reflective mirror.

Next, a case where the printer of this embodiment is used for printing will be described. With the light source shutter 20 closed, the reflection original is attached to the original mount 22 and the original mount 22 is positioned at the vertical position. Further, the dial 16 is automatically or manually rotated to independently adjust the positions of the three filters C, M, and Y in the optical path. When the light source shutter 20 is opened in this state, the light emitted from the lamp 10 is dimmed by the color correction filter 12, diffused by the mirror box 18, and the diffused light is emitted to the reflection original on the original mount 22. The reflection original is illuminated mainly by diffused light from the mirror box 18 in the vicinity of the lower side, and is mainly illuminated by diffused mirrors 30, 32, 34 in the vicinity of the upper side and the left and right sides to reflect the diffused light from the mirror box 18. The reflection original is illuminated substantially uniformly.
Then, when the black shutter 27 is opened and closed, the image of the reflection original is printed on the printing paper.

The position of the color correction filter can be automatically controlled. Although an example of using the color correction filter for light source color correction has been described above, a cut filter including three C, M, and Y filters for exposure control may be used instead of the color correction filter. .

Further, although the example using a single light source has been described, two or more light sources may be used when applied to a printer for printing a large-sized reflection original.

[0017]

As described above, according to the present invention, since a filter device for color correction is not interposed in the lens system and a small number of light sources are used, a print with good image quality can be produced. The effect of being able to provide a small printer that can

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a printer according to an embodiment of the present invention.

FIG. 2 is a schematic side view showing the printer of the above embodiment.

FIG. 3 is a schematic top view showing the printer of the embodiment.

[Explanation of symbols]

 12 color correction filter 22 original mount 30, 32, 34 reflection mirror

Claims (1)

[Claims] 1. At least one light source, a diffusing device for diffusing light emitted from the light source to illuminate a reflection original, and a light source and a diffusing device arranged so as to be able to move in and out of the optical path. A printer including: a filter device; a reflecting device that reflects the light beam emitted from the diffusing device to illuminate a low-illuminance portion of a reflective original; and a lens that forms an image of the illuminated reflective original on photographic paper. .