The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 2000
Filed:
Feb. 19, 1998
Weng-Lyang Wang, Saratoga, CA (US);
CMOS Sensor, Inc., Cupertino, CA (US);
Abstract
An image sensor system having very long Depth Of Focus (DOF) on the document plane and very short optical distance from the document plane to the image plane provides the advantages of both a lens reduction image sensor system and a contact type image sensor system. The inventive image sensor system thus provides a Long depth of Focus Contact type Image Sensor (Lf-cis) system that can be assembled in a compact and light weight module that is suitable for use in current image scanning systems (for example, flatbed type, paper feeder type, and handheld type). The invention also provides a compact and light weight flatbed type image scanning system. The CIS module may be modified such that two ends of the module higher than the rest of the module, a steel bracket holds the module and maintains the optical path in alignment, and a metal carriage having metal spring holds the module. The CIS module is self aligned to the bottom of the scanner glass. No optical adjustment or mechanical adjustment is required on the scanner assembly line. A central guideway and a low power stepping motor are provided to drive the entire module.