Active-passive scanning system

Details Active-passive scanning system Active-passive scanning system

1975-08-06

1982-04-27

Buczinski, S. C.

Optics: measuring and testing

Angle measuring or angular axial alignment

With photodetection remote from measured angle

244 316, 250236, 350 64, G01B 1126, G02B 2717

Patent

active

043267998

ABSTRACT:
A scanning system combining active and passive detection of radiation from targets. In the active mode, a laser beam is scanned with a rotating wedge in a downward looking Palmer pattern, a portion of the beam is reflected from targets, and coherent detection is performed on the returned signals. Means is disclosed for automatically compensating for misalignment between the signal return beam and local reference beam upon the coherent detector. In the passive mode, infrared radiation inherently emitted by targets is also detected.

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patent: 3899145 (1975-08-01), Stephenson
patent: 3951358 (1976-04-01), de Lang et al.
patent: 3954228 (1976-05-01), Davis, Jr.

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