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:
Apr. 10, 2012
Filed:
Dec. 21, 2009
Markus Duelli, Seattle, WA (US);
Alban N. Lescure, Redmond, WA (US);
Mark O. Freeman, Snohomish, WA (US);
Christian Dean Dejong, Sammamish, WA (US);
Joshua M. Hudman, Sammamish, WA (US);
Markus Duelli, Seattle, WA (US);
Alban N. Lescure, Redmond, WA (US);
Mark O. Freeman, Snohomish, WA (US);
Christian Dean DeJong, Sammamish, WA (US);
Joshua M. Hudman, Sammamish, WA (US);
Microvision, Inc., Redmond, WA (US);
Abstract
A optical apparatus () for use in an laser imaging system () is provided. The optical apparatus () includes one or more optical elements () that are configured to create an intermediate image plane () in the laser imaging system (). A diffractive optical element () is then disposed at the intermediate image plane () to reduce speckle. The diffractive optical element () includes a periodically repeating phase mask () that can be configured in accordance with steps, vortex functions, Hermite-Gaussian functions, and so forth. Smooth grey-level phase transitional surface () can be placed between elements () to improve brightness and image quality. The periodically repeating phase mask () makes manufacture simple by reducing alignment sensitivity, and can be used to make applicable safety standards easier to meet as well.