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:
Sep. 27, 1977
Filed:
Nov. 08, 1976
Applicant:
Inventors:
John Shi Wei, Ottawa, CA;
William Dickson Westwood, Ottawa, CA;
Assignee:
Northern Telecom Limited, Montreal, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G03B / ;
U.S. Cl.
CPC ...
350-6 ; 355 66 ; 355 51 ; 250234 ;
Abstract
An optical system for a scanning apparatus uses a folded optical path with certain mirrors moving, the movement of the mirrors such that the length of the optical path, and thus the magnification, is maintained constant. Either a fixed or movable lens system can be provided. With a fixed lens system there is differential movement of mirrors. With a moving lens system, the lens system and image receiver move in fixed relationship with the scanning mirror.