Light spot position sensor for a wavefront sampling system

Details Light spot position sensor for a wavefront sampling system Light spot position sensor for a wavefront sampling system

1979-06-26

1981-06-16

Corbin, John K.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902

Patent

active

042734460

ABSTRACT:
A light spot position sensor for a wavefront sampling system having a crossed Ronchi chopper disk interposed between the diffracted laser beams of the wavefront sampling system and the intensity detectors located within the wavefront sampler. The crossed Ronchi chopper disk interrupts, at a predetermined interval, the diffracted beam of light which focuses as a spot on the disk. The relative position of the spot(s) is determined with respect to an alignment beam, the position of which is known. By means of appropriate electronics the electronic phase of each frequency of the spot is detected and compared with the phase of each frequency of the known spot to provide a two axis spot position location.

REFERENCES:
patent: 3090279 (1963-05-01), Chisholm
patent: 3291991 (1966-12-01), Welti
patent: 3500050 (1970-03-01), Hillman
patent: 3532894 (1970-10-01), Devine
patent: 3549239 (1970-12-01), Brienza et al.
patent: 3606548 (1971-09-01), Dyson
patent: 3614235 (1971-10-01), Munnerlyn
patent: 3950099 (1976-04-01), Malueg

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