Application of two-wavelength interferometry for testing severely aberrated mirrors

Ilya Sh. Etsin; Vadim A. Parfenov

doi:10.1117/12.407701

22 November 2000 Application of two-wavelength interferometry for testing severely aberrated mirrors

Ilya Sh. Etsin, Vadim A. Parfenov

Proceedings Volume 4338, Wave Propagation in the Atmosphere and Adaptive Optics; (2000) https://doi.org/10.1117/12.407701
Event: Selected Research Paper on Wave Propagation in the Atmosphere and Adaptive Optics, 2000, Tomsk, Russian Federation

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).

Citation Download Citation

Ilya Sh. Etsin and Vadim A. Parfenov "Application of two-wavelength interferometry for testing severely aberrated mirrors", Proc. SPIE 4338, Wave Propagation in the Atmosphere and Adaptive Optics, (22 November 2000); https://doi.org/10.1117/12.407701

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