A simple digital fringe-fraction measuring instrument

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Published under licence by IOP Publishing Ltd
, , Citation P E Ciddor et al 1975 J. Phys. E: Sci. Instrum. 8 91 DOI 10.1088/0022-3735/8/2/009

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1 CSIRO, Chippendale, NSW, Australia

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0022-3735/8/2/91

Abstract

Describes a simple controller for the reference mirror in a photoelectric gauge-measuring interferometer. A digital display of the transducer current, and a simple digital calculator (both readily available at low cost) are used to give rapid reading of fringe fractions without the need for calibration.

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