Adaptive system for phasing large composite telescope mirrors for CO2 laser radiation transportation

Inna M. Belousova; Vladimir A. Grigoryev; Oleg O. Stepanov; Vladislav Ya. Telkunov

doi:10.1117/12.334835

28 December 1998 Adaptive system for phasing large composite telescope mirrors for CO₂ laser radiation transportation

Inna M. Belousova, Vladimir A. Grigoryev, Oleg O. Stepanov, Vladislav Ya. Telkunov

Proceedings Volume 3684, Laser Optics '98: Nonlinear and Coherent Optics; (1998) https://doi.org/10.1117/12.334835
Event: Laser Optics '98, 1998, St. Petersburg, Russian Federation

Abstract

Adaptive phasing system for large-sized composite telescope mirrors intended for transportation of high-power CO₂- lasers radiation by long distances are presented. The phasing system consists of a wave-front censor and a unit for controlling drives. A heterodyne side-shift interferometer with a rotated radial diffraction grating was used as the wavefront censor. The grating can operate both in visible and IR spectral ranges. The phasing system allows to monitor and control automatically the correct form of the composite mirror in conditions of mechanical vibrations and thermal effects with the error not greater than (lambda) /40. At external perturbing factors, whose phase variations may reach 100 degree(s) to 120 degree(s)C, the (Strehl) phasing efficiency is 0.977. The phasing system can be also applied in astronomical telescopes and other systems for observation of remote objects.

Citation Download Citation

Inna M. Belousova, Vladimir A. Grigoryev, Oleg O. Stepanov, and Vladislav Ya. Telkunov "Adaptive system for phasing large composite telescope mirrors for CO₂ laser radiation transportation", Proc. SPIE 3684, Laser Optics '98: Nonlinear and Coherent Optics, (28 December 1998); https://doi.org/10.1117/12.334835

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