KR940005698Y1 - Structure of a reflection mirror in a small size copier - Google Patents

Abstract

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Description

Reflector structure of small copier

1 is a schematic configuration diagram showing a reflector structure of a conventional color copying machine.

2 is an original surface roughness distribution diagram according to a reflector structure of a conventional copier.

3 is a schematic configuration diagram of a reflector structure of a small copying machine according to the present invention.

4 is a light path diagram reflected by the reflector structure according to the present invention.

5 is a light distribution diagram when the reflector structure of the present application is applied.

* Explanation of symbols for main parts of the drawings

1: light source 2: arc reflector

3: Manuscript 4: Hyojo Drawing

5: semi-circular reflector 6: infrared cut filter

7: darkroom case 8: cell width lens (SELFOC LENS)

9: Slit 10: Film

This study relates to a reflector structure of a small copying machine. More specifically, in a small copying machine using a CYCOLOR radiation method, the loss of light is increased by increasing the amount of light emitted from a light source and incident on an effective illuminance surface of a document. The present invention relates to a reflector structure of a small copying machine designed to minimize and cancel an iron-type light distribution in an effective roughness plane.

In general, the image quality and clarity of a copy is reflected by an original and passed through an imaging system such as a lens, and after printing a latent image formed on a medium such as a film or a drum on a sheet of paper, the image is reflected by the original and then transferred to the imaging system. It largely depends on the amount of incident light.

On the other hand, the conventional cycal copying method exposes the film coated with the microcapsule containing the color dye to change the hardness of the microcapsule, and then blows the microcapsule by passing the pressure roller together with the paper to make the microcapsule into the microcapsule. It is a method of reproducing color images by chemical reaction between dyes and paper. It is similar to the existing silver dye photo method.

However, since the film used for the cycal radiation method has very low photosensitivity compared to the film used for the general silver salt photographing method, an energy of about 3,000mj / m 2 is required to sufficiently expose the film. In addition to using a high-pressure halogen lamp (HALOGEN LAMP) as a light source, it is required to use a reflector with good reflection efficiency in order to increase the amount of light incident on the effective roughness plane of the original.

However, in the above-described scalar copier, the conventional reflector structure has a light source because the reflector 2 is formed on only one surface of the halogen lamp light source 1 as shown in FIG. Loss of light directed upward of the light emitted from (1) occurs, and since the majority of the light reflected from the reflector 2 reaches only one focal point on the original 3, the effective roughness plane on the original 3 In FIG. 4, as shown in FIG. 2, the light distribution distribution having a bright center is formed, and thus there is a problem in that the copy quality is poor and the image quality is not evenly formed.

The purpose of this paper is to solve the above problems, maximizing the amount of light emitted from the light source and incident on the effective roughness plane on the original, minimizing the loss of light, and at the same time providing a uniform light distribution in a wide area around the effective roughness plane. It is an object of the present invention to provide a reflector structure of a small copier that can be obtained.

In order to achieve the above object, the circular arc reflector close to the ellipse is provided opposite to each other in the upper and lower parts of the light source, and a semicircular reflector concentric with the light source is installed at the rear of the light source, In addition, an infrared cut filter for preventing thermal damage is installed, and a slit (SLIT) through which air flow can be formed is formed between the semi-circular reflector and the arc-shaped reflector.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings as an embodiment.

That is, in the present invention, as shown in FIG. 3, in the small sized copying machine of the scalar radiation method, the light source 1 is emitted from the light source 1 on both sides of the light source 1 located on one side of the darkroom case 7. In order to prevent the loss of light and to form a uniform light distribution around the effective illuminance plane 4 on the original 3, an arc-shaped reflector 2 adjacent to an ellipse is provided to face each other, and the light source 1 In order to prevent the light emitted backward from the light source 1 in the rear of the semi-circular reflector 5 concentric with the light source 1 is installed, the light source in front of the light source 1 An infrared cut filter 6 is provided to prevent thermal damage of the document 3.

In this case, the reflector is configured to have the maximum size by keeping the angle between the original 3 surface and the optical path axis at 45 ° in consideration of the decrease in the size of the reflector as the size of the copier decreases.

On the other hand, between the semi-circular reflector 5 installed behind the light source 1 and the arc reflector 2 installed above and below the light source 1 is emitted from the light source 1 made of 800W high-voltage linear halogen lamp. In order to prevent the temperature of the entire reflector structure from rising by heat, a slit 9 is formed to allow the flow of air by a fan (not shown).

In the figure, reference numeral 9 denotes a cell width lens, and 10 denotes a film.

The operation of the present proposal configured as described above is as follows.

That is, as shown in FIG. 4, the light emitted from the light source 1 is arc-shaped reflector 2 provided above and below the light source 1 and a semi-circular reflector installed concentrically behind the light source 1 ( 5) and light incident on the surface of the original 3, the light incident directly on the surface of the original 3 from the light source 1 forms an effective roughness plane 4 on the original 3 and reaches the effective roughness plane 4. After the reflected light is reflected by the document 3, an image is formed on the scalar film 10 through a cell width lens (SELFOC LENS) 8.

On the other hand, the light reaching the arc reflector 2 on the upper part of the light source 1 is reflected to be incident on the right side from the center of the effective illuminance plane 4 on the original 3 surface to form a uniform illuminance plane, and the lower arc reflector Light incident on (2) is reflected to be incident on the left side from the center of the effective illuminance plane 4 on the original 3 surface to form a uniform illuminance plane.

In addition, the light reflected by the semi-circular reflector 5 installed at the rear of the light source 1 again passes through the center of the light source 1 and reaches the upper and lower arc-shaped reflectors 2 and is reflected again as described above. The light is incident on the left and right surfaces of the effective roughness plane 4 on the document 3.

According to the above proposal, since the light source and the concentric semi-circular reflector are installed at the rear of the light source, the light is prevented from being lost to the rear of the light source, and the reflectance of the arc reflector installed above and below the light source is doubled. have. The upper arc reflector reflects 20% of the light emitted from the light source around the effective roughness plane of the original, and the lower arc reflector enters 25% of the light emitted from the light source, and also the effective illuminance plane of the original from the light source. Since the light incident directly on the image is about 5% of the total amount of light, the total incident amount of light incident on the original is increased to 50% or more, and since the arc reflector is made of an arc shape in which an ellipse is close to the original, As a uniform light distribution can be obtained from a wide area centered on the effective roughness plane of the image as shown in the following table, a light distribution of a continuous distribution as shown in FIG. 5 can be obtained instead of the conventional iron shape. As a result, a high quality copy can be obtained, thus improving the reliability of the product.

TABLE 1

(The length of the effective roughness plane in the above table is about 13mm, and the change in intensity of light emitted from the light source and incident on the effective roughness plane on the original exists within about 10%.)

Claims (2)

In the reflector structure of the copier according to the scalar radiation method using the high-voltage linear lamp as the light source, an arc-shaped reflector 2 is disposed on the upper and lower sides of the light source 1 so as to face up and down, and behind the light source 1. A semi-circular reflector 5 is installed, and an infrared cut filter 6 is installed on the optical path in front of the light source 1 to prevent thermal damage of the document 3 by the light source. The arc-shaped reflector 2 and the semi-circular reflector are provided. Reflector structure of a small copy machine, characterized in that the air flow slit (9) is formed between (5). The compact copying machine according to claim 1, wherein the semicircular reflector 5 is concentric with the light source 1, and the angle between the optical path axis emitted from the light source 1 and the surface of the document 3 is 45 degrees. Reflector structure.