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Proceedings Paper

Application of two-wavelength interferometry for testing severely aberrated mirrors
Author(s): Ilya Sh. Etsin; Vadim A. Parfenov
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Paper Abstract

Two modifications of two-wavelength interferometry method are suggested for testing severely distorted mirrors in adaptive optics. One of them is conventional modification demanding optical phase measurements at two light wavelengths. Two diode lasers generating in mid-IR spectral range at room temperature and sparse-array photodetectors are used in this case. Another modification is method of two-wavelength dynamic holography. IN last case optically addressed liquid-crystal spatial light modulator is supposed to be used as a dynamic hologram. It is shown that the proposed modifications of the two-wavelength interferometry method are perspective for testing severely aberrated mirrors with distortions up to 1 mm (that corresponds to 10...20 degree of maximum wavefront local slope in the exit pupil of controllable optical system).

Paper Details

Date Published: 22 November 2000
PDF: 10 pages
Proc. SPIE 4338, Wave Propagation in the Atmosphere and Adaptive Optics, (22 November 2000); doi: 10.1117/12.407701
Show Author Affiliations
Ilya Sh. Etsin, S.I. Vavilov State Optical Institute (Russia)
Vadim A. Parfenov, S.I. Vavilov State Optical Institute (Russia)


Published in SPIE Proceedings Vol. 4338:
Wave Propagation in the Atmosphere and Adaptive Optics
Vladimir P. Lukin, Editor(s)

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