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Image reader

An image reading device and an image reading technology, which are applied in printing devices, image communication, radiation control devices, etc., and can solve problems such as image quality degradation

Inactive Publication Date: 2003-12-24
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if external light other than reflected light from the document surface (surface to be read) enters from the cutout provided in the cover portion, there is a problem that the quality of the read image deteriorates.

Method used

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Experimental program
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Embodiment Construction

[0029] Preferred embodiments according to the present invention will now be described with reference to the accompanying drawings.

[0030] figure 1 is a schematic diagram showing the outline of a copying machine as an example of an apparatus including the image reading device according to the present invention. The copier 25 has an image input section 19 including a document setting glass 18 on which a document (object) 17 is placed and a scanning direction 21 which is arranged to be opposed to the document setting glass 18 and which can be parallel to the document setting glass 18 The extended guide rod 21' moves the image reading device 20. The copier 25 has an image forming section 26 that forms an image on a recording medium from the image read out at the image input section 19 by using a well-known process such as electrophotography or the like. Note that the expression "image" is used in this specification as a generic term including characters, figures, patterns, and...

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PUM

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Abstract

A reduction optical system including a lens 12 and a mirror 13, a CCD image sensor 11 and a frame including a frame member 4 for accommodating the reduction optical system and the CCD image sensor are integrated to constitute an image reading unit 2, and the unit 2 is covered with a cover member 1. A lamp 3 is provided on the cover member 1 and spatially isolated from the inner space of the unit 2. A slit 16 of the cover member 1 is closed by a transparent member 10. The lamp 3 emits the light 15 a onto a document 17 on a document setting glass 18, and the reflected light 15 b from the document 17 enters the CCD image sensor 11 through the transparent member 10, slit 16, slit 4', mirror 13 and the lens 12 and is converted into electrical information, thereby reading image information of the document 17.

Description

technical field [0001] The present invention relates to an image reading device that reads an image of an object (which will be generally regarded as including characters, graphics, patterns, etc. "image"). Background technique [0002] Conventionally, the basic structure of an image reading apparatus that reads an image of an object in an image input portion of a copier, facsimile, scanner, etc. includes: a light source that irradiates an object such as an original document with light; an optical system that The system guides the light emitted from the light source and reflected by the object; the image sensor receives the reflected light guided by the optical system. A xenon lamp is generally used as a light source, and a CCD image sensor in which CCD elements are lined up one-dimensionally or linearly is largely used as an image sensor. Generally, since the length of the CCD element row of the CCD image sensor is smaller than the reading width of the object, the reflect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B27/50H01L27/00H01L27/148H04NH04N1/00H04N1/028H04N1/031H04N1/04H04N1/10H04N1/19H04N1/193
CPCH01L27/14806H04N1/1013H04N1/02845H04N1/0313H04N1/193
Inventor 村松茂树内田彻古头康一长谷要
Owner EASTMAN KODAK CO