Interferometer with two-frequency phase modulation
Journal Article
·
· Optics and Spectroscopy
OSTI ID:146145
- Vavilov State Optical Univ., St. Petersburg (Russian Federation)
An interference method of two-frequency phase modulation is studied experimentally and theoretically as applied to displacement measurement and wave front control. Analysis is performed of errors resulting from shot noise, hysteresis of the piezoceramic modulator, phase shift between modulating oscillations, and scatter of their amplitudes. It is shown that a phase measurement error of 2{pi}/180 can be obtained in actual conditions. 6 refs., 3 figs.
- OSTI ID:
- 146145
- Journal Information:
- Optics and Spectroscopy, Vol. 77, Issue 1; Other Information: PBD: Jul 1994; TN: Translated from Optika i Spektroskopiya; 77: No. 1, 141-144(1994)
- Country of Publication:
- United States
- Language:
- English
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