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:
Jun. 30, 2009
Filed:
Mar. 07, 2005
Richard M. Knox, Lago Vista, TX (US);
Kevin Hathaway, Saratoga, CA (US);
David Kappel, San Diego, CA (US);
Robert E. Fischer, Westlake Village, CA (US);
Biljana Tadic-galeb, Thousand Oaks, CA (US);
Richard M. Knox, Lago Vista, TX (US);
Kevin Hathaway, Saratoga, CA (US);
David Kappel, San Diego, CA (US);
Robert E. Fischer, Westlake Village, CA (US);
Biljana Tadic-Galeb, Thousand Oaks, CA (US);
Riake Corporation, Lago Vista, TX (US);
Abstract
Systems and methods for providing illumination suitable for imaging devices such as laser projection systems, wherein the illumination pattern is adjustable by modifying one or more characteristics of a controlled angle diffuser. In one embodiment, a highly collimated (e.g., laser light) beam is passed through a holographic diffuser to create a well defined cone angle for the light emanating from each point on the diffuser. This light is focused into an illumination image that is controlled by the prescription of the diffuser. In one embodiment, the diffuser can be positioned to alternately place different regions having different prescriptions in the optical path corresponding to the illumination image. In one embodiment, the diffuser can be continually moved to eliminate speckling and 'worminess' in the illumination image.