Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-02-06
1991-01-29
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250574, 250239, 73170A, G01N 1506, G01W 100
Patent
active
049888854
ABSTRACT:
A submerged small angle field-of-view optical radiometer which can passively measure ocean surface wave heights, characteristics, and statistics remotely. The mechanism involves measurement of a varying underwater radiant light field and correlation of that light field to surface wave heights. The device comprises a passive optical detector, a narrow band optical filter, a small angle field-of-view limiter and associated electronics for power, monitoring and control. The device is housed in a watertight container with an optically transmissive window and is connected to onshore or inboard electronics by a single cable. The cable carries power, monitoring, control and data signals to and from the sensor to the onshore or inboard electronics. The sensor can be bottom mounted on the sea floor or can be mounted on a submerged platform such as a submarine.
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Hughes et al., "A Fast Response Surface-Wave Slope Meter and Measured Winave Moments", Deep-Sea Research vol. 24 No. 12, 12/77, pp. 1211-1223.
Wu et al., "Scanner for Measuring Fine Sea-Surface Structures", Rev. Sci. Instrum. 52(8), 8/81, pp. 1246-1251.
Lall Prithvi C.
McGowan Michael J.
Messinger Michael
Nelms David C.
The United States of America as Represented by the Secretary of
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