Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1985-03-12
1991-04-02
Yasich, Daniel M.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25022723, 25023110, 2504581, 73293, 73714, 374131, 374161, G01N 2164, G01K 1112, G02B 514, G01L 702
Patent
active
050049135
ABSTRACT:
Methods, materials and devices for the remote measurement of physical variables with fiber optic systems use a single excitation light source for generating through the use of at least one luminescence converter, both a signal beam and a reference beam, and allow the transmission of both beams through a single fiber to a single photodetector, thus producing photo-electric signals the relative intensities of which are only minimally affected by changes of the intensity of the interrogating light beam, optical losses, or detector drift. In contrast to the prior art, the luminescent materials of this invention can be used either as transducers for physical parameters or as means for processing information from other optical transducers, without requiring a change in the luminescence properties of said materials under the influence of the measured parameter. Furthermore, the techniques and devices of this invention allow the use of luminescent materials for converting a measurand with a low coefficient of change under the action of the parameter being measured into a measurand with a large coefficient of change.
REFERENCES:
patent: 3239406 (1966-03-01), Coffman et al.
patent: 3639765 (1972-02-01), Kleinerman
patent: 3996472 (1976-12-01), Rabatin
patent: 4061578 (1977-12-01), Kleinerman
patent: 4075493 (1978-02-01), Wickershein
patent: 4111050 (1978-09-01), Waddoups
patent: 4136566 (1979-01-01), Christensen
patent: 4215275 (1980-07-01), Wickersheim
patent: 4223226 (1980-09-01), Quick et al.
patent: 4245507 (1981-01-01), Samulski
patent: 4262198 (1981-04-01), Gupta et al.
patent: 4278349 (1981-07-01), Sander
patent: 4281245 (1981-07-01), Brogardh et al.
patent: 4302970 (1981-12-01), Snitzer et al.
patent: 4307607 (1981-12-01), Saaski et al.
patent: 4313057 (1982-01-01), Gelbwachs
patent: 4327963 (1982-05-01), Khoe et al.
patent: 4342907 (1982-08-01), Macedo et al.
patent: 4356448 (1982-10-01), Brogardh et al.
patent: 4374328 (1983-02-01), Tekippe et al.
patent: 4376890 (1983-03-01), Engstrom et al.
patent: 4409476 (1983-10-01), Lofgren et al.
patent: 4437772 (1984-03-01), Samulski
patent: 4443699 (1984-04-01), Keller
patent: 4443700 (1984-04-01), Macedo et al.
patent: 4448547 (1984-05-01), Wickersheim
patent: 4451730 (1984-05-01), Brogardh et al.
patent: 4462699 (1984-07-01), Shaw et al.
patent: 4523092 (1985-06-01), Nelson
patent: 4539473 (1985-09-01), Brogardh et al.
patent: 4562348 (1985-12-01), Brogardh et al.
patent: 4576486 (1986-03-01), Dils
patent: 4880972 (1989-11-01), Brogardh et al.
"Optical Fibers with Reduced Pressure Sensitivity", N. Lagakos et al., May 5, 1981, Optics Letters, vol. 6, No. 9, Sep. 1981, pp. 443-445.
"A Temperature Measuring Device", E. Okamoto et al., Feb. 21, 1974, Early Patent Application, 51452/72, pp. 3-8.
Introduction to Solid State Physics, by Charles Kittle, Nov. 1957, pp. 495, 496, 516, 517, 524.
McGraw-Hill Dictionary of Scientific and Technical Terminology, .COPYRGT.1978, p. 948, "Luminescent Center" defined.
Yasich Daniel M.
Yavner Stanley J.
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