Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1981-05-07
1983-07-05
Cangialosi, Sal
Optics: measuring and testing
Range or remote distance finding
With photodetection
356 4, G01C 308
Patent
active
043915159
ABSTRACT:
Optical detection apparatus is provided which includes a coherent light sce for generating a beam of coherent light. The apparatus further includes a unitized or discrete optical component which receives the generated beam, and projects light thereof which has a particular polarization characteristic into a specified environment. The optical component also functions to receive or absorb light from the environment which has the particular polarization characteristic, and to directably reflect light from the environment which does not have the polarization characteristic. A lens or other light collecting device focuses light reflected by the discrete optical component upon a light detection element. A light conducting path is provided between the coherent light source and the light detecting element to enable generated coherent light to be mixed with the reflected light upon the light detecting element to provide data signals which indicate the presence of an object in the environment.
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H. J. Cerritsen, Infrared Polarizer RCT TN No. 608, Mar. 1965.
Crisler John R.
Forrester Howard M.
Beers R. F.
Cangialosi Sal
Gordon M.
Skeer W. T.
The United States of America as represented by the Secretary of
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