Method and apparatus for sensing disturbance using fiber-optic p

Details Method and apparatus for sensing disturbance using fiber-optic p Method and apparatus for sensing disturbance using fiber-optic p

1989-05-11

1990-05-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250225, 73516LM, 73653, H01J 516

Patent

active

049220950

ABSTRACT:
A method and apparatus for sensing vibrational disturbance using fiber optic coils conducting circularly polarized light. A circularly polarized light source illuminates each of a sensing fiber optic coil in a disturbance-sensitive environment and a reference fiber optic coil in a constant environment, and light from both coils is analyzed through polarization shuttering to detect the degree of polarization rotation thereby to enable determination of frequency and amplitude of the disturbance.

REFERENCES:
patent: 4110609 (1978-08-01), Beer
patent: 4159577 (1979-07-01), Bergkvist
patent: 4173412 (1979-11-01), Ramsay et al.
patent: 4291978 (1981-09-01), Seigel
patent: 4295738 (1981-10-01), Meltz et al.
patent: 4322829 (1982-03-01), Davis, Jr. et al.
patent: 4363114 (1982-12-01), Bucaro et al.
patent: 4375680 (1983-03-01), Cahill et al.
patent: 4408495 (1983-10-01), Couch et al.
patent: 4420260 (1983-12-01), Martinelli
patent: 4422167 (1983-12-01), Shajenko
patent: 4428234 (1984-01-01), Walker
patent: 4446543 (1984-05-01), McLandrich et al.
patent: 4495411 (1985-01-01), Rashleigh
patent: 4515473 (1985-05-01), Mermelstein
patent: 4519252 (1985-05-01), McMahon
patent: 4525818 (1985-06-01), Cielo et al.
patent: 4534222 (1985-08-01), Finch et al.
patent: 4564289 (1986-01-01), Spillman, Jr.
patent: 4593385 (1986-06-01), Chamuel
patent: 4613752 (1986-09-01), Davis
patent: 4617113 (1987-06-01), Carome
patent: 4642458 (1987-02-01), Jackson et al.
patent: 4644153 (1987-02-01), Ida
patent: 4799752 (1989-01-01), Carome
patent: 4829821 (1989-05-01), Carome
patent: 4841774 (1989-06-01), Hall

Affiliated with

Also associated with

Rating

Method and apparatus for sensing disturbance using fiber-optic p does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for sensing disturbance using fiber-optic p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for sensing disturbance using fiber-optic p will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-831756