Time-shared aperture device

Details Time-shared aperture device Time-shared aperture device

1982-02-09

1983-05-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

356152, G01J 120

Patent

active

043841988

ABSTRACT:
A time-shared aperture device using the laser illuminated target to provide a return wavefront which passes through the optical train and beam expander. The distortions in this return wavefront are sampled by a rotating beam chopper which completely blocks the outgoing beam, thereby preventing scattered laser light in the optical train and beam expander from drowning out the fainter target return. Wavefront analyzers provide an indication of errors present in the optical system so that correction may be applied.

REFERENCES:
patent: 1779324 (1930-10-01), Long, Jr.
patent: 1816047 (1931-07-01), Keuffel
patent: 4042822 (1977-08-01), Brandewie et al.

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