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:
Oct. 03, 1978
Filed:
Jan. 19, 1966
Applicant:
Inventors:
George B Parrent, Jr, Carlisle, MA (US);
John H Ward, Billerica, MA (US);
Assignee:
Technical Operations, Incorporated, Boston, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
3501 / ; 356 71 ;
Abstract
The specification discloses an optical technique for retrieving images of geometric shapes from a cluttered background in a photographic record by means of amplitude and phase filters configured according to the particular shape sought to be retrieved. A Fourier transform of the record is filtered with filters of both types and light representing the desired shape, if present, is brought to a focus in an image plane.