Phase measuring device

Details Phase measuring device Phase measuring device

1978-11-06

1980-07-22

Clark, Conrad J.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902

Patent

active

042136970

ABSTRACT:
An improved phase measuring method and apparatus for measuring the relative hase and amplitude of an applied optical signal beam at a number of points in a plane. The combination of the signal beam and a reference beam are simultaneously directed onto a pair of photodector arrays, the reference beam on one array being .pi./2 radians out of phase with the reference beam on the other array. Respective interference patterns are formed on the photodector arrays, points on the arrays are sampled, and the desired amplitude and phase of the signal beam at the sampling points is determined by a series of computational steps.

REFERENCES:
patent: 3409375 (1968-11-01), Hubbard
patent: 3601490 (1971-08-01), Erickson
patent: 3635552 (1972-01-01), DeLang
patent: 3694088 (1972-09-01), Gallagher

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