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:
Jan. 12, 1999
Filed:
Oct. 07, 1996
Applicant:
Inventors:
Jehad Khoury, Concord, NH (US);
Philip Hemmer, Fitchburg, MA (US);
Charles L Woods, Stow, MA (US);
Jonathan Kane, Somerville, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03H / ; G03H / ; G03H / ;
U.S. Cl.
CPC ...
359 10 ; 359 11 ; 359-4 ; 359-7 ;
Abstract
Image derogating optical noise due to light scattering of an object under examination, embedded in a light scattering medium, is substantially reduced by passing a modulated signal laser beam through the scattering medium, and interfering the emerging signal with a coherent modulated reference beam to produce a hologram in a photorefractive member of the object, which in turn is read out of the crystal by a third unmodulated coherent beam to retrieve a clear image of the object. A smart pixel image convertor light valve may be substituted for the photorefractive member.