Patent ID: 7672056

Claim:
A method for wavefront correction, the method comprising: determining a temperature of a dual frequency liquid crystal spatial light modulator, wherein the dual frequency liquid crystal spatial light modulator is configured to modify phase relationships of a wavefront of light transmitted therethrough; determining a crossover frequency of the dual frequency liquid crystal spatial light modulator using the temperature; controlling the dual frequency liquid crystal spatial light modulator so as to effect wavefront phase correction using the determined crossover frequency; receiving light with a phase measurement system from the dual frequency liquid crystal spatial light modulator and providing phase information regarding the light; controlling the dual frequency liquid crystal spatial light modulator with a multiplexed array commands circuit; storing phase information for a plurality of wavefronts stored in wavefront data storage; receiving a signal at phase control logic from the phase measurement system, the signal being representative of measured phase relationships of a wavefront; receiving information at the phase control logic from the wavefront data storage, the signal being representative of desired phase relationships of the wavefront; and providing control signals from the phase control logic to the multiplexed array command circuit, the signal facilitating control of the dual frequency liquid crystal spatial light modulator in a manner that tends to make the measured phase relationships more like the desired phase relationships.