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19 May 1998 Compensation for distortions of a telescope's primary mirror by means of a volume dynamic hologram
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We describe a number of experiments devoted to compensation for aberrations in the primary mirror of a telescope using a volume dynamic holography technique, where the writing and reading of the hologram are carried out independently. Three sets of experiments demonstrating holographic aberration correction have been performed. In all cases transmitting holograms were formed in photorefractive crystals such as BSO and SBN. In experiments with a small diameter primary mirror the image is formed by a multicolor point-like object. The system includes a unit which compensates for the hologram dispersion. The aberration correction of a six- segmented primary mirror of 150 mm in diameter is demonstrated in conditions where there is a pronounced difference in the wavelengths of the recording beams and that of the source observed (Δλ=0.12 μm). The experiments on observation an extended object of continuous spectrum (Δλ=0.35 μm) with a single primary mirror of 150 diameter have been also made. All these experiments indicate an efficient compensation of distortions of the primary mirror by the hologram.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mikhail P. Bogdanov, Sergei A. Dimakov, Alexander V. Gorlanov, Valery M. Irtuganov, Sergei I. Kliment'ev, Konstantin G. Lazunin, Irina B. Orlova, Andrew M. Scott, Vladimir E. Sherstobitov, Nataliya A. Sventsitskaya, and Dmitrii I. Zhuk "Compensation for distortions of a telescope's primary mirror by means of a volume dynamic hologram", Proc. SPIE 3263, Nonlinear Optical Engineering, (19 May 1998);

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