Optical centroid processor wavefront sensor
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United States of America Patent
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-
Jan 21, 1992
Grant Date -
N/A
app pub date -
Nov 16, 1990
filing date -
Nov 16, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved optical centroid processor wavefront sensor is described in which an image is optically impinged on a plurality of mask arrays. A group of mask arrays, having a coarse dependant function, filters light onto corresponding photodetector arrays. The output of the photodetectors provide a coarse signal indicative of spot displacement over an increased tilt dynamic range. Another group of mask arrays, having a fine dependant function, filters light onto corresponding photodetector arrays. The output of the photodetectors provide a fine signal indicative of spot displacement with an increased accuracy. The coarse and fine signals may be employed by a deformable mirror to correct aberrations in a light beam wavefront.
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