Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1996-11-18
1998-04-14
Wong, Don
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
2503571, 2503418, 2503391, 68 1205, G01J 502
Patent
active
057395349
ABSTRACT:
A system for detecting the presence of a fluid comprising: means for transmitting at least two infrared electromagnetic signals toward a fluid, each of the infrared electromagnetic signals have different wavelengths. It also includes means for sensing the reflection of each of the electromagnetic signals as well as means for creating a plurality of electrical signals indicating the intensity of the reflected signals. Finally, it includes means for determining the presence of said fluid by comparing the intensities of the plurality of electrical signals.
REFERENCES:
patent: 4653294 (1987-03-01), Akinaga
patent: 4946242 (1990-08-01), Tanno et al.
patent: 5218206 (1993-06-01), Schmitt et al.
patent: 5220168 (1993-06-01), Adamski et al.
patent: 5305485 (1994-04-01), Getz et al.
Adamski Joseph R.
Estenson Michael A.
Petty J. Scott
Raytheon Corporation
Wong Don
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