Optical: systems and elements – Diffraction – From grating
Reexamination Certificate
2005-09-26
2008-10-07
Allen, Stephone B. (Department: 2872)
Optical: systems and elements
Diffraction
From grating
C359S566000
Reexamination Certificate
active
07433124
ABSTRACT:
An illumination system designed to eliminate laser speckle and a single-panel projection system employing the same. The illumination system includes a laser light source to sequentially emit a plurality of laser beams, and a first diffractive optical element that is partitioned into a plurality of segments having diffractive patterns that correspond to the plurality of laser beams to move synchronously with the sequential emission of the plurality of laser beams. The laser speckle is removed by moving the first diffractive optical element in such a manner as to temporally average the plurality of laser beams. The illumination system efficiently removes the laser speckle, and the projection system having the illumination system provides improved image quality.
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Korean Office Action dated Mar. 30, 2006, issued in KR 2004-86543.
Dho Sang-whoe
Kim Sung-ha
Allen Stephone B.
Samsung Electronics Co,. Ltd.
Stanzione & Kim LLP
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