Optical seismic transducer

Details Optical seismic transducer Optical seismic transducer

1981-09-16

1985-02-19

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367178, 350358, 73653, G01V 116, G01V 118, G01D 526

Patent

active

045009791

ABSTRACT:
A spring-suspended mass has top and bottom reflectors. A laser light beam is divided into separate beams that are reflected from the top and bottom reflectors into photo detectors. At the photo detectors, a reference beam from the same laser is recombined with the two reflected beams to produce two interference fringe patterns in response to seismic disturbances of the mass. A count of the number of fringes and fractions thereof that are detected over a unit time interval is proportional to velocity of the mass in terms of the wavelength of the laser beam. The phase difference between the two interference fringe patterns is a measure of polarity of the seismic disturbances.

REFERENCES:
patent: 3429184 (1969-02-01), Russel
patent: 3435656 (1969-04-01), Jordan et al.
patent: 3693400 (1972-09-01), Savit
patent: 3831137 (1974-08-01), Cuomo
patent: 3961185 (1976-06-01), Brokenshire et al.
patent: 4188096 (1980-02-01), Shazenko
patent: 4322829 (1982-03-01), Davis et al.
patent: 4363114 (1982-12-01), Bucaro et al.
Shazenko et al., "Signal Stabilization . . . Source", 6/15/80, pp. 1895-1897, Appl. Optics, vol. 19, 1980.

Affiliated with

Also associated with

Rating

Optical seismic transducer 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 seismic transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical seismic transducer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-617431