Intrusion sensor using optic fiber

Details Intrusion sensor using optic fiber Intrusion sensor using optic fiber

1979-10-17

1983-01-04

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

250215, 250221, 340545, 340555, 350 961, 350 9634, G08B 1304, G08B 1318

Patent

active

043674607

ABSTRACT:
A transparent continuous optical fiber is embedded in a transparent panel made of glass or plastic, with the two ends of the fiber accessible from outside the panel for coupling to a visible or invisible light source and detector respectively. By nearly matching the refractive indices of the panel and the fiber, and using good-quality material for the fiber so that it does not scatter significant amounts of the light passing through it, the fiber can be made virtually invisible although it establishes a complete light circuit. Cutting or breaking through the panel at a point intersecting the fiber interrupts the light circuit and triggers an alarm.

REFERENCES:
patent: 2311613 (1943-02-01), Slayter
patent: 3320114 (1967-05-01), Schultz
patent: 3594770 (1971-07-01), Ham et al.
patent: 3634845 (1972-06-01), Colman
patent: 3714644 (1973-01-01), Hellstrom
patent: 3947837 (1976-03-01), Bitterice
patent: 4175827 (1979-11-01), McMahon
patent: 4195907 (1980-04-01), Zanja et al.
patent: 4217488 (1980-08-01), Hubbard
patent: 4228425 (1980-10-01), Cooke
patent: 4234875 (1980-11-01), Williams
Snyder, A. W. and Mitchell, D. J., Leaky Rays on Circular Optical Fibers, Journal of the Optical Society of America, vol. 64, No. 5, May, 1974.

Affiliated with

Also associated with

Rating

Intrusion sensor using optic fiber does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Intrusion sensor using optic fiber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intrusion sensor using optic fiber will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1583902