Optical sensing system

Details Optical sensing system Optical sensing system

1980-07-29

1983-01-18

Arnold, Bruce Y.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356349, G01B 902

Patent

active

043689817

ABSTRACT:
In an optical sensing system a laser beam is split by a 3dB optical directional coupler into two beams which in turn are launched into single mode optical fibers of different lengths. Since the two single mode optical fibers are maintained at the temperature to be measured, a phase difference is produced between the beams transmitted through the optical fibers. The beams passing through the optical fibers are synthesized by the 3dB optical directional coupler to form an interference pattern comprised of "light" and "dark" regions. The wavelength of the light beam is monotonically varied over a predetermined range so as to cause these regions to vary in position. This variation in position is manifested at a given point in the interference pattern as a variation in signal amplitude, and this variation in signal amplitude is detected to infer the temperature to be measured.

REFERENCES:
patent: 4183670 (1980-01-01), Russell
H. Hubota, "Wave Optics", Iwanami Bookstore, pp. 126-129, Jan. 30, 1979 (first edition issued Feb. 2, 1971).

Affiliated with

Also associated with

Rating

Optical sensing system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical sensing system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical sensing system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-135758