Optical centroid processor wavefront sensor

Details Optical centroid processor wavefront sensor Optical centroid processor wavefront sensor

1990-11-16

1992-01-21

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

356354, H01J 4000

Patent

active

050830155

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.

REFERENCES:
patent: 4141652 (1979-02-01), Feinleib
patent: 4399356 (1984-08-01), Feinleib et al.
patent: 4725138 (1988-02-01), Wirth et al.
patent: 4737621 (1988-04-01), Gonsiorowski et al.
patent: 4950878 (1990-08-01), Ulich et al.
patent: 4996412 (1991-02-01), Anafi et al.

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