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:
Apr. 25, 1995
Filed:
Apr. 14, 1993
Applicant:
Inventors:
Calvin M Winey, Carlisle, MA (US);
Laurier St Onge, Londonderry, NH (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03F / ; G01J / ;
U.S. Cl.
CPC ...
358484 ; 358489 ; 358490 ; 358493 ; 2502012 ;
Abstract
A focusing system for the optical head of a rotary drum scanner establishes focus quickly and automatically by iteratively scanning a line of a document on the drum and repeatedly adjusting the focus of the head in accordance with a focus optimizing function until the region of optimal focus is found.