JPS6442656U

JPS6442656U -

Info

Publication number: JPS6442656U
Application number: JP13683687U
Authority: JP
Priority date: 1987-09-09
Filing date: 1987-09-09
Publication date: 1989-03-14

Description

[Brief explanation of the drawing]

第１図は本案になるカラー画像読み取り装置に
係る光源部の実施例を示す形状図、第２図は本案
になる方形状板ガラスの作用を説明する図、第３
図は本案実施例を示すカラー画像読み取り装置の
主要部斜視図、第４図は本案になる方形状板ガラ
スの効果を説明するためのＣＣＤイメージセンサ
の出力信号を示す波形図である。１……放形状板ガラス、２……原稿、３……光
源、４……ミラー、５……縮小レンズ、６……Ｃ
ＣＤイメージセンサ（光電変換素子）、７……フ
イルタ。 FIG. 1 is a shape diagram showing an embodiment of the light source section of the color image reading device according to the present invention, FIG. 2 is a diagram explaining the function of the square plate glass according to the present invention, and FIG.
FIG. 4 is a perspective view of the main parts of a color image reading device according to an embodiment of the present invention, and FIG. 4 is a waveform diagram showing an output signal of a CCD image sensor for explaining the effect of the rectangular plate glass according to the present invention. 1...Radio-shaped plate glass, 2...Original, 3...Light source, 4...Mirror, 5...Reducing lens, 6...C
CD image sensor (photoelectric conversion element), 7...filter.

Claims

[Scope of Claim for Utility Model Registration] 1. Light from a light source is irradiated onto the document surface, the reflected light from the document surface is guided through a mirror, reduction lens, and filter, and is received by a photoelectric conversion element (hereinafter referred to as a CCD image sensor). In an image reading device that reads an image, the light source lamp (hereinafter referred to as a light source fluorescent lamp) is used so that the light intensity distribution on the light receiving surface can be obtained arbitrarily.
Between the document surface and the document surface, a plurality of micro prisms are arranged side by side in a linear stripe pattern on a part or the entire surface, and each prism refracting surface has a rectangular plate lens with a different refractive angle in a stepped manner. What is claimed is: 1. An image reading device characterized in that at least one image reading device is formed. 2. The image reading device according to claim 1, wherein the refraction angle of the prism formed on the square plate lens is sequentially changed from near the center of the square plate lens. 3. The image reading device according to claim 1, wherein a prism is formed on at least one surface of the rectangular plate lens surface. 4. In order to make the light intensity distribution uniform on the light-receiving surface, a square plate lens is placed on at least one surface, and a striped prism is placed on the refractive surface of a prism having a convex or concave lens function in a direction perpendicular to the longitudinal direction of the square lens. The image reading device according to claim 1, characterized in that the image reading device is formed. 5. In order to increase the amount of light on the light-receiving surface, a striped prism is formed on at least one surface of the rectangular plate lens in the longitudinal direction and circumferential direction of the rectangular plate lens to form a prism refractive surface that has a convex lens function. 2. The image reading device according to claim 1, wherein the image reading device is arranged as follows. 6. Claim 1, characterized in that one side of the rectangular plate lens surface has a concave lens function and the other surface has a convex lens function in order to simultaneously satisfy uniformity of light intensity distribution on the light receiving surface and increase in light intensity. The image reading device described. 7. Claim 1, characterized in that the prism refractive surface formed on the square plate lens has a curved shape.
The image reading device described in Section 1.