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:
Dec. 04, 1990
Filed:
Apr. 17, 1989
Joseph Chovan, North Syracuse, NY (US);
William A Penn, Baldwinsville, NY (US);
Jerome J Tiemann, Schenectady, NY (US);
William E Engeler, Scotia, NY (US);
General Electric Company, Syracuse, NY (US);
Abstract
The invention relates to holography and more particularly to an electronic holographic apparatus whose electrical output represents the magnitude and phase of coherent light reflected from a three-dimensional object and distributed over the aperture of the apparatus. The apparatus provides a coherent beam which illuminates the object to create a speckle pattern in an aperture bounding an optical sensing arrangement. A reference beam derived from the same source as the illuminating beam illuminates the sensing aperture directly and creates fringes in the speckle pattern. The optical sensing arrangement consists of a charge injection device (CID) camera with plural optical detectors arranged in relation to the speckle pattern to sense the magnitude and spatial phase of each speckle (on the average). The sampled outputs of the CID detectors are processed to isolate the magnitude and phase information representing the complex optical wavefront of the hologram from irrelevent terms created by the interference process. The detected information may be used for such purposes as imaging, interferometry, matched filtering or correlation.