Patent ID: 6115126
Filing Date: 2000-09-05
Classification: G01J

Abstract:
An optical wavefront analyzer for measuring a wavefront of a light beam having an incident direction comprising:a single phase shifter for generating interference patterns as said light beam is made incident on said single phase shifter at an incident angle;a driving device for positioning said single phase shifter to a plurality of positions with respect to which said light beam is made incident on said single phase shifter at a plurality of said incident angles respectively in order to obtain a first set of interference patterns, and for rotating said single phase shifter with respect to said incident direction from a first position to a second position so as to respectively obtain said first set of interference patterns and a second set of interference patterns;a pattern receiving device for recording light intensities of said first set of interference patterns and said second set of interference patterns respectively; anda phase reconstructing device electrically connected to said pattern receiving device for executing a phase unwrapping operation according to said light intensities.