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:
Nov. 16, 1999
Filed:
Dec. 17, 1993
Frederick W Freyre, Wantagh, NY (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
An optical correlator includes at least one electrically addressable liquid crystal array, at least one LED array for generating a reference image which is modulated by changing the transmissivity of the liquid crystals in the liquid crystal array, and at least one two-dimensional large size photodiode, the photodiode receiving a modulated image from the liquid crystal array. LED and liquid crystal array are stacked together with a photodiode or an array of photodiodes with no space between, for an exceptionally simple, compact and inexpensive optical correlator structure.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile