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:
Jul. 11, 1978
Filed:
Mar. 02, 1977
Applicant:
Inventor:
Sidney W Marshall, Webster, NY (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
250230 ; 2502 / ; 356170 ;
Abstract
A signal generating apparatus driven by the reference beam of an image scanning system is disclosed. The apparatus includes an apertured codeplate across which the reference beam sweeps, light from the beam triggering a photodetector to produce a signal pulse output. A grating is inserted into the beam path to split the reference beam into a plurality of spaced apart beams effective to offset blockage or irregularity of one or more of the codeplate apertures.