Wavefront correction system
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United States of America Patent
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Dec 26, 2006
Grant Date -
Oct 12, 2006
app pub date -
Apr 8, 2005
filing date -
Apr 8, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A wavefront correction system using a dual frequency liquid crystal spatial light modulator to vary phase relationships of a wavefront is disclosed. A light beam from the dual frequency liquid crystal spatial light modulator can be split into a reference beam and a plurality of measurement beams to enhance a speed and/or accuracy of phase measurement. A temperature of the dual frequency liquid crystal spatial light modulator can be sensed to facilitate temperature control and/or temperature compensation, so as to enhance the accuracy associated with use of the crossover frequency used to control the dual frequency liquid crystal spatial light modulator.
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