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. 11, 1978
Filed:
Nov. 15, 1976
Applicant:
Inventors:
Istvan Gorog, Princeton, NJ (US);
Brown F Williams, Princeton, NJ (US);
Assignee:
RCA Corporation, New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358199 ; 358200 ; 358206 ; 358285 ; 350311 ;
Abstract
An optical scanner is disclosed for scanning a three-dimensional object or a two-dimensional document located in a space which is open and exposed to ambient light. Light from a laser is directed through a beam splitter and a deflector to the object or document, from which it is reflected back through the deflector, and from the beam splitter through a narrow-band optical interference filter to a photodetector. The laser light is modulated at a carrier frequency rate, and the electrical signal from the photodetector is demodulated to produce a video signal free of disturbances due to ambient light.