Optical detector

Details Optical detector Optical detector

1978-11-30

1981-08-11

Corbin, John K.

Optics: measuring and testing

Of light reflection

356384, 356397, G01N 2155, G01B 1100

Patent

active

042831466

ABSTRACT:
An optical detector for the detection of very small objects comprises a first optical system defining an optical path and being operable to transmit electromagnetic radiation onto an object to be detected; a second optical system defining an optical path parallel to said optical path of said first optical system and being operable to receive said electromagnetic radiation after diffusion and reflection by said object; and a converging lens associated in common with said first and second optical systems and arranged such that said optical paths of said first and second optical systems are parallel to and symmetrical about the axis of said converging lens on one side thereof.

REFERENCES:
patent: 3016464 (1962-01-01), Bailey
NASA Tech. Brief NTN-78/0156, "Optical Proximity Detector", NPO-13306, Caltech/JPL, Pasadena, California.
Van Nostrand's Scientific Encyclopedia's definition of "collimator", Princeton, N.J., Fourth Edition, 1968.

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