Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1991-06-28
1992-12-01
Willis, Davis L.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25022714, 25022724, 356436, 356133, 385 12, H01J 516, G01N 2100
Patent
active
051681560
ABSTRACT:
A fiber-optic sensor is formed from three optical fibers. The distal ends of the fibers are optically linked by bonding their cores and directing their ends to mirrors. A portion of one of the fibers near the bonded point is exposed directly to the fluid to be sensed. The transmission characteristics of this fiber, the signal fiber, is then affected by the chemical constituents of the fluid. Light directed into the proximal end of one of the other fibers, the input fiber, is split between the signal fiber and the remaining fiber, the reference fiber. The ratio of the light in the signal fiber to the light in the reference fiber provides an indication of the chemical constituents that minimizes errors introduced by factors such as bends in the fibers and temperature.
REFERENCES:
patent: Re33789 (1992-01-01), Stevenson
patent: 4312562 (1982-01-01), Segawa et al.
patent: 4433291 (1984-02-01), Yarviv et al.
patent: 4514054 (1985-04-01), Stowe
patent: 4560248 (1985-12-01), Cramp et al.
patent: 4582809 (1986-04-01), Block et al.
patent: 4596925 (1986-06-01), Gilby
patent: 4599711 (1986-07-01), Cuomo
patent: 4668861 (1987-05-01), White
patent: 4755054 (1988-07-01), Ferree
patent: 4778237 (1988-10-01), Sorin
patent: 4783137 (1988-11-01), Kosman et al.
patent: 4786130 (1988-11-01), Georgiou et al.
patent: 4827121 (1989-05-01), Vidrine, Jr. et al.
patent: 4830451 (1989-05-01), Stone
patent: 4834496 (1989-05-01), Blyler, Jr.
patent: 4834497 (1989-05-01), Angel
patent: 4851665 (1989-07-01), Pesavento et al.
patent: 4895421 (1990-01-01), Kim et al.
patent: 4904940 (1990-02-01), Rempt
patent: 4907857 (1990-03-01), Giuliani et al.
patent: 4972076 (1990-11-01), Willson
patent: 5015843 (1991-05-01), Seitz et al.
"Underground Storage Tanks", Photonics Spectra 81, Apr. 1991.
Burgess, Jr. Lloyd W.
Fischer George
Evans Larry W.
Gilbert Teresan W.
Miller John E.
Pham Hoa Q.
The Standard Oil Company
LandOfFree
Reflective evanescent fiber-optic chemical sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reflective evanescent fiber-optic chemical sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reflective evanescent fiber-optic chemical sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-504161