Self-calibrating interferometer

Details Self-calibrating interferometer Self-calibrating interferometer

1980-08-08

1982-10-26

Arnold, Bruce Y.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356358, G01B 1102

Patent

active

043559000

ABSTRACT:
A self-calibrating interferometer which forms therein a pair of Michelson interferometers with one beam length of each Michelson interferometer being controlled by a common phase shifter. The transfer function measured from the phase shifter to either of a pair of detectors is sinusoidal with a full cycle for each half-wavelength of phase shifter travel. The phase difference between these two sinusoidal detector outputs represents the optical phase difference between a path of known distance and a path of unknown distance.

REFERENCES:
patent: 3353115 (1967-11-01), Maiman
patent: 3392622 (1968-06-01), Senf
patent: 3586416 (1971-06-01), De Bitetio
patent: 3659510 (1972-05-01), Garuin et al.
patent: 3825348 (1974-07-01), Normarski et al.
patent: 3868185 (1975-02-01), Genzel et al.
patent: 4052129 (1977-10-01), Schawlow et al.

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