Facsimile and static presentation processing – Facsimile – Picture signal generator
Reexamination Certificate
1998-07-15
2001-05-01
Lee, Cheukfan (Department: 2722)
Facsimile and static presentation processing
Facsimile
Picture signal generator
C358S475000, C358S487000, C358S474000
Reexamination Certificate
active
06226107
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to scanners, and more particularly, to a multi-resolution scanner for scanning reflective and transparent documents without moving any scanner component.
2. Description of the Prior Art
Science progresses have significantly brought many scanners to be produced for achieving different kinds of requirements. Scanners are often requested to be standard equipment for building in a computer case.
Conventionally, the build-in scanners are usually constrained by usable spaces, and the scanning range is serious influenced because the sizes of the mechanical and optical components can not be effective reduced. Furthermore, traditional build-in scanners can only scan reflective documents, such as papers, photos, and business cards because the light source is usually allocated at the scanned sides of the scanned documents. Those transparent documents such as projection slides or lantern slides can not be scanned directly in the conventional build-in scanners, and additional peripheral scanning devices are needed for scanning such documents. In addition, the scanning resolution used for the reflective documents is insufficient for the transparent documents. What is clearly needed is a scanner being capable of scanning both the reflective and the transparent documents under a circumstance of larger scanning range.
SUMMARY OF THE INVENTION
The object of the invention is to provide a multi-resolution scanner for scanning the transparent and the reflective documents without moving the scanner components.
Accordingly, the invention discloses a multi-resolution scanner for scanning the transparent and the reflective documents by combining a single light source and lenses with different resolutions. Lights from the transparent documents follow different optical paths from the optical path that light from the reflective documents follow, but to project to the same charged-coupled device. The scanner uses a lens for transparent documents and the reflective documents respectively with different resolutions for achieving the documents' requirements.
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Lee Cheukfan
Mustek System Inc.
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