Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1991-10-23
1993-06-08
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356338, G01N 2186
Patent
active
052182118
ABSTRACT:
A system which samples and records the locations of opaque particles accumulating on a surface. The system represents graphically the geometrical distributions of the particles through an integral electronic hardware/software subsystem. The key component is a radiant energy sensitive sensor which produces the sampling surface. The sensor is exposed to a constant level of radiant energy. Opaque particles becoming resident upon the sensor surface inhibit sensitization of the surface by the radiant energy and thereby indicates the presence and location of the particle. Embodiments of the sensor include charge coupled devices (CCDs), photodiode arrays, intrinsic or extrinsic "bulk" material, and optically- or UV-erasable memories.
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Allen Richard A.
Cresswell Michael W.
Linholm Loren W.
Peckerar Martin C.
deAngeli Michael M.
Nelms David C.
The United States of America as represented by the Secretary of
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