System and method for reduction of image artifacts for laser...

Details System and method for reduction of image artifacts for laser... System and method for reduction of image artifacts for laser...

2008-07-15

2008-07-15

Pritchett, Joshua L (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S558000

Reexamination Certificate

active

07400449

ABSTRACT:
A system and method is disclosed for reducing visibility of image artifacts caused by diffractive elements in a laser projector having a structured diffractive device. At least two diffracted orders of light can be selected from light emitted from the structured diffractive device using a spatial light filter. The polarization of at least one of the selected diffracted orders can be changed with respect to another selected diffracted order. The selected diffracted order can be recombined to form an image having reduced visible image artifacts.

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Trisnadi, Jahja, “Speckle contrast reduction in laser projection display,” pp. 1-7, sunnyvale, CA 94089.

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