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:
Feb. 19, 2013
Filed:
Nov. 01, 2011
Nicholas George, Pittsford, NY (US);
Kedar Khare, Rochester, NY (US);
Nicholas George, Pittsford, NY (US);
Kedar Khare, Rochester, NY (US);
University of Rochester, Rochester, NY (US);
Abstract
A phase screen, i.e., an opto-electronic device that can convert a distorted incoming optical wavefront into a plane wave or, conversely, transform a plane wave into a prescribed varying output wavefront. Binary all-digital MEMS interferometer configurations that can be used to create controlled and arbitrary optical wavefront using only 0,1 amplitude changes followed by differential propagation distances to convert these amplitude variations into controllable and/or continuous phase variations. Clustered pixel notions, such as Floyd-Steinberg, Stucki or other algorithms useful in digital half-tone printing, are simultaneously employed to create controllable grey-level variations as well as continuous phase variations. Desired grey-levels can be obtained wherein each pixel is formed by, e.g., a 3×3 or 5×5 cluster of mirrors. Both the filling-in of the outputs of the binary mirror (0,1) and the grey-levels are accomplished simply by spatial averaging over a short propagation distance.