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:
May. 12, 1998
Filed:
Jun. 07, 1995
David Jonathan Swithers, North Attleboro, MA (US);
Alex A Rysin, Pawtucket, RI (US);
Computer Identics, Inc., Canton, MA (US);
Abstract
A high-speed, high-resolution optical scanner system includes a flying spot scanner for scanning a beam across an object bearing information to be read and a high-bandwidth, high-sensitivity optical receiver including an avalanche photodiode for sensing the variation in light intensity of the beam reflected from the object being scanned; a power source for biasing the avalanche diode proximate its reverse breakdown voltage to produce high current gain in response to incident light; and a charge collector circuit responsive to the avalanche photodiode for producing a voltage proportional to the light incident on the avalanche photodiode.