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Installation for increasing a scanning range of a scanner along an axial direction of a light source

a technology of axial direction and installation, which is applied in the direction of electrical equipment, pictoral communication, etc., can solve the problems of deteriorating scan image quality near the edges of the light axis, and achieve the effects of increasing the scanning range, reducing the spatial occupation of the scanner, and increasing the usable range of the light sour

Inactive Publication Date: 2009-03-24
CEDAR LANE TECH INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides an installation for increasing the scanning range of a light source in a document scanner. This installation includes a light source and a transparent glass panel with a coating that reduces brightness variations along the light axis. The coating is applied to the transparent glass panel to smooth out the variation of brightness levels and improve the contrast of the document. The technical effect of this invention is to increase the usable range of the light source and reduce spatial occupation of the scanner."

Problems solved by technology

If the variation in brightness level along the axial direction of the light source is large, quality of a scan image near the edges of the light axis may deteriorate.

Method used

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  • Installation for increasing a scanning range of a scanner along an axial direction of a light source
  • Installation for increasing a scanning range of a scanner along an axial direction of a light source
  • Installation for increasing a scanning range of a scanner along an axial direction of a light source

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Embodiment Construction

[0027]Reference will now be made in detail to the present preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.

[0028]FIG. 1 is a schematic view of a scanning system according to a first preferred embodiment of this invention. The scanning system includes a light source 10, a transparent glass panel 30, a light-source reflector 20, reflecting mirrors 40, a lens 15, a charge coupled device 35 and a document 25. The light source 10 provides the necessary light for document scanning. In general, the light source 10 is linear and hence has a light axis perpendicular to the plane of the page on which FIG. 1 lies. The document 25 is placed on top of the transparent glass panel 30. Light emerging from the light source is reflected from the light-source reflector 20. The reflected light penetrates the transparent glas...

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Abstract

An installation for increasing the scanning range along the axial direction of the light source. The installation includes a light source and a transparent glass panel. The light source provides a light beam necessary for scanning a document. The transparent glass panel has a coating thereon for lowering light transparency near the mid-portion of the light axis relative to either end.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the priority benefit of Taiwan application serial no. 88222562, filed Dec. 18, 1999.BACKGROUND OF THE INVENTION[0002]1. Field of Invention[0003]The present invention relates to an installation for increasing a scanning range of a scanner. More particularly, the present invention relates to an installation for increasing a scanning range of a scanner along an axial direction of a light source.[0004]2. Description of Related Art[0005]In general, a scanning system can be roughly classified as a reflective type or a light-penetrating type. In the reflective scanning system, a document is placed over a transparent glass panel. Light from a light source travels through the transparent glass panel and hits the document. The light is reflected back from the document to reach an optical sensor after passing through a set of optical elements. The optical sensor, for example, can be a charge couple device (CCD) where a scan im...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04N1/04H04N1/028H04N1/10H04N1/191H04N1/193
CPCH04N1/02815H04N1/0285H04N1/0287H04N1/02885H04N1/1013H04N1/1061H04N1/193
Inventor TSENG, JEN-SHOU
Owner CEDAR LANE TECH INC