Optical: systems and elements – Diffusing of incident light
Reexamination Certificate
2005-03-07
2009-06-30
Lavarias, Arnel C (Department: 2872)
Optical: systems and elements
Diffusing of incident light
C359S015000, C362S355000, C362S311040
Reexamination Certificate
active
07554737
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.
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Fischer Robert E.
Hathaway Kevin
Kappel David
Knox Richard M.
Tadic-Galeb Biljana
Lavarias Arnel C
Law Offices of Mark L. Berrier
Riake Corporation
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