Abstract

A highly accurate real-time surface profile measuring system has been constructed by combining a Bi₁₂SiO₂₀ (BSO) phase conjugating mirror (PCM) with a Twyman-Green interferometer. In this new interferometer the convex lens collects and focuses the scattering object waves in the BSO crystal, and the PCM reconstructs the object field through the same lens. The method of deriving surface profile is similar to conventional ones but differs in that it does not require exact phase modulation of the interferograms. This system features a quite high measurement accuracy free of aberrations of the lens and of hysteresis or aging of the piston actuator used to change the phase of the reference field. The principle and basic experimental results are presented.

© 1982 Optical Society of America

Coherent optical image delay device using a BSO phase-conjugate mirror and its applications

Takuso Sato, Tohru Suzuki, Peter J. Bryanston-Cross, Osamu Ikeda, and Takeshi Hatsuzawa
Appl. Opt. 22(6) 815-818 (1983)

Measurement accuracy of interferometers with self-pumped phase-conjugate mirrors

Axel Krause and Gunther Notni
J. Opt. Soc. Am. B 13(11) 2558-2568 (1996)

Stabilization of the BSO phase conjugator using a feedback technique

Takuso Sato, Takeshi Hatsuzawa, and Osamu Ikeda
Appl. Opt. 22(13) 1996-1998 (1983)

Liquid crystal light valve using bulk monocrystalline Bi₁₂SiO₂₀ as the photoconductive material

P. Aubourg, J. P. Huignard, M. Hareng, and R. A. Mullen
Appl. Opt. 21(20) 3706-3712 (1982)

Measurement of small vibration amplitudes of a rough surface by an interferometer with a self-pumped phase-conjugate mirror

Xiangzhao Wang, Osami Sasaki, Takamasa Suzuki, and Takeo Maruyama
Appl. Opt. 39(25) 4593-4597 (2000)