Interferometer

Details Interferometer Interferometer

1978-09-11

1980-01-15

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902, G01P 900

Patent

active

041836707

ABSTRACT:
An interferometer device and method for detecting variations in the effective path length of light on opposite sides of an enclosed ring-like optical path. Laser light is split and passed in opposite directions around an area in one or more planes to a point where the beams come together at which point they are directed, in coincidence, into one or more photodetectors. A variable light delay means is located in each light path and each delay means is operated repetitively to vary the delay by a selected amount and at a selected rate to produce repeating bursts of selected beat frequencies at said photodetector. After heterodyning the beat frequencies down, the differences therebetween are repetitively measured by a frequency counter to a high degree of accuracy by long term averaging. Slow rates of rotation of the apparatus about an axis normal to the plane of the enclosed path are detected independently of noise in the system and variations in the frequency of the laser.

REFERENCES:
patent: 3468608 (1969-09-01), Doyle
patent: 3512890 (1970-05-01), McLaughlin
patent: 3517982 (1970-06-01), Fonda-Bonardi
patent: 3825347 (1974-07-01), Kaiser
patent: 4035081 (1977-07-01), Sepp et al.
"New Module Splits Laser Beams," Aviation Week & Space Tech., vol. 79, #17, Oct. 21, 1963, pp. 95 & 97.

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1026717