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. 21, 1992
Filed:
Nov. 16, 1990
Carl G Witthoft, Acton, MA (US);
Allan Wirth, Bedford, MA (US);
Lawrence Schmutz, Watertown, MA (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
An improved optical centroid processor wavefront sensor is described in which an image is optically impinged on a plurality of mask arrays. A group of mask arrays, having a coarse dependant function, filters light onto corresponding photodetector arrays. The output of the photodetectors provide a coarse signal indicative of spot displacement over an increased tilt dynamic range. Another group of mask arrays, having a fine dependant function, filters light onto corresponding photodetector arrays. The output of the photodetectors provide a fine signal indicative of spot displacement with an increased accuracy. The coarse and fine signals may be employed by a deformable mirror to correct aberrations in a light beam wavefront.