Vol. 20, issue 05, article # 5

pdf Lukin V. P., Grigorjev V. M., Antoshkin L. V., Botygina N. N., Emaleev O. N., Konyaev P. A., Kopylov E. A., Lavrinov V. V., Kovadlo P. G., Skomorovskii V. I. Tests of the adaptive optical system with a modified correlation sensor at the big solar vacuum telescope. // Atmospheric and oceanic optics. 2007. V. 20. No. 05. P. 379-386.
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Tests of the modified correlation sensor (MCS) at Big solar vacuum telescope (BSVT) have shown that at a proper choice of the filtering function parameters, the MCS reliably measures shifts of the solar granulation image in the telescope first focus under good visibility conditions. The MCS, as a part of the adaptive optical system, was intended for measuring the image shift in the telescope second focus. It turned out that the image quality becomes noticeably worse at image transfer to the second focus. The MCS measures the image shift of solar granulation in the second focus only under extremely good visibility conditions and certain granulation structure. Reduction of the telescope entrance aperture to 170 mm insignificantly affects the image quality and, therefore, the MCS operation.