Fibre-optic interferometric remote sensor

Details Fibre-optic interferometric remote sensor Fibre-optic interferometric remote sensor

2007-11-06

2007-11-06

Connolly, Patrick (Department: 2877)

Optics: measuring and testing

By light interference

Using fiber or waveguide interferometer

Reexamination Certificate

active

10514919

ABSTRACT:
A method and apparatus for receiving measurements from an interferometer transducer (22) uses a broad band light beam (19A), reflected from the transducer (22), and compares it with the amplitudes of narrow band beams, derived from the reflected broad band light beam (19A), by filters (23A-23D) on different frequencies. The narrow band light beams and the broad band light beam (19A) are measured on photo detectors (22A,21B-21E). Microprocessor (57) compares outputs of the photo detectors to interpret phase differences between signals (25, 27, 29) from the narrow band beams. A periodically operable shutter and a single photo detector (21) can also be used. Other embodiments modulate (12) the light source (10) to produce very short broad band pulses of light (36, 40) which are reflected from the transducer (22).

REFERENCES:
patent: 6122305 (2000-09-01), Putnam et al.

Affiliated with

Also associated with

Rating

Fibre-optic interferometric remote 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 Fibre-optic interferometric remote sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fibre-optic interferometric remote sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3835964