Two-axis moire fringe displacement transducer

Details Two-axis moire fringe displacement transducer Two-axis moire fringe displacement transducer

1974-11-25

1976-05-18

Segal, Robert

Optics: measuring and testing

Refraction testing

Prism engaging specimen

250237G, G01B 902, G01B 1102, G01B 1104

Patent

active

039573788

ABSTRACT:
A two-axis Moire fringe displacement transducer is disclosed in which the scale grating is inscribed with a grid pattern consisting of two superimposed orthogonal optical line sets and the index grating is inscribed with at least two discrete optical grating patterns, each of the at least two grating patterns aligned with a respective grid grating set such as to generate Moire fringe patterns in a respective grating upon relative movement along each orthogonal direction.

REFERENCES:
patent: 3756723 (1973-09-01), Hock
patent: 3768911 (1973-10-01), Erikson
patent: 3806254 (1974-04-01), Ha et al.
patent: 3867035 (1975-02-01), Kaul
patent: 3867038 (1975-02-01), Westell

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