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US 6,144,475 AGranted
Optical system for scanner
AssigneeAvision Inc.
InventorThomas Sheng
Life of this patent
Estimating the term…
Abstract
The reflection mirrors in the optical system of a scanner is arranged to have reflections in a vertical direction instead of a horizontal direction as is commonly done. Then, the horizontal dimension of the scanner can be reduced.
Claims16
An optical system for a scanner having a document placed over a scanning window supported by side walls of a frame, comprising:
- at least one light source for scanning said document and reflecting a first light ray in a nearly vertical direction;
- at least one mirror for reflecting said first light ray;
- a deflecting mirror for deflecting said first ray toward a last mirror to produce a second light ray in a designated direction;
- a lens for focusing the light emitted from said last mirror, placed opposite to the normally folding edge of said document with respect to said first light ray, when the document is a book to provide a space-saving optical system by allowing the scanner to scan close to the folding edge of the book, which is positioned at an obtuse angle between said window and one of said walls.
1 more element
Dependencies are inferred from the claim text.