Phase stable automatic gain control for heterodyne holographic interferometry
作者:
James W. Wagner,
Douglas J. Gardner,
期刊:
Review of Scientific Instruments
(AIP Available online 1986)
卷期:
Volume 57,
issue 7
页码: 1435-1437
ISSN:0034-6748
年代: 1986
DOI:10.1063/1.1138564
出版商: AIP
数据来源: AIP
摘要:
A simple circuit is described which provides a fixed output amplitude for an input variation of 20 dB and with a relative phase shift variation (output versus input) of only 0.12° over the same range. The circuit was developed for use in a heterodyne holographic interferometry system where relative phase measurements to an accuracy of 0.36° are required of signals whose amplitudes may vary by as much as an order of magnitude during a single experiment.
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