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:
Oct. 29, 2013
Filed:
Jul. 11, 2011
Markus Duelli, Seattle, WA (US);
Mark O. Freeman, Snohomish, WA (US);
Christian Dean Dejong, Sammamish, WA (US);
Alban N. Lescure, Les Mureaux, FR;
Markus Duelli, Seattle, WA (US);
Mark O. Freeman, Snohomish, WA (US);
Christian Dean DeJong, Sammamish, WA (US);
Alban N. Lescure, Les Mureaux, FR;
Microvision, Inc., Redmond, WA (US);
Abstract
A laser-based imaging system () is configured to reduce perceived speckle in images (). The imaging system () includes one or more laser sources (), a light modulator () configured to produce the images () with light () from the laser sources (), and one or more active polarization switches () disposed in an optical path of the imaging system (). The active polarization switch () is configured to alternate a polarization orientation of the light in synchrony with an image refresh cycle of the system. The active polarization switch can be clocked in accordance with a clocking angle to optimize speckle reduction. Additionally, one or more light preconditioners () may be used to help optimize speckle reduction.