Optics: measuring and testing – Lamp beam direction or pattern
Patent
1987-05-26
1989-04-25
Evans, F. L.
Optics: measuring and testing
Lamp beam direction or pattern
250201, G01J 120
Patent
active
048242438
ABSTRACT:
A wavefront sensor (10) for use in determining a phase error of an input beam (16) is disclosed. The wavefront sensor (10) includes mechanisms for obtaining a sample of an input beam (16). A mechanism (18) for splitting the beam (16) into two component beams (46) and (48) is associated with the beam (16). A second mechanism (20) for splitting the two component beams (46) and (48) into four component beams (58), (60), (62) and (64) is associated with the first splitting mechanism (18). A mechanism (26) for detecting the intensity distribution of the four component beams (58), (60), (62) and (64) is associated with the second splitting mechanism (20). A mechanism for determining the phase error of the input beam (16) from the intensity distributions is associated with the detector mechanism (26). Also disclosed is a method for determining the phase error on an input beam (16 ) using the above described wavefront sensor (10).
REFERENCES:
patent: 4405232 (1983-09-01), Mansell
Cook Lacy G.
Wheeler Bryce A.
Evans F. L.
Hughes Aircraft Company
Karambelas A. W.
Streeter William J.
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