Sensor system for detecting wavefront distortion in a return bea

Details Sensor system for detecting wavefront distortion in a return bea Sensor system for detecting wavefront distortion in a return bea

1977-11-25

1979-02-27

Corbin, John K.

Optics: measuring and testing

Lamp beam direction or pattern

250201, G01J 120

Patent

active

041416520

ABSTRACT:
An improved apparatus for sensing wavefront distortions in a return beam of light, such as a beam returned through a turbulent atmosphere or through an imperfect optical system from a radiating or illuminated object is disclosed. This apparatus includes the components typically present in a Hartmann-type wavefront sensor, and additionally includes means to provide a modulated reference beam of light which is combined with the return beam. The use of a modulated reference beam eliminates the necessity for precise optical alignment, which is difficult or impossible to maintain in most operating environments.

REFERENCES:
patent: 3923400 (1975-12-01), Hardy
patent: 3980879 (1976-09-01), O'Meara
patent: 3988608 (1976-10-01), O'Meara

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