Physics – Optics
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000kfnts...3..292b&link_type=abstract
Kinematika i Fizika Nebesnykh Tel, Suppl, no. 3, p. 292-296
Physics
Optics
Scientific paper
We present the Hartmann images to attestate the Cassegrain focus optics of the 2-m telescope of the Peak Terskol Observatory of the International Center for Astronomical and Medico-Ecological Research of the NASU/RAS. The Cassegrain focus optics is a classical Ritchey-Chretien system with compensated coma and spherical aberration. The astigmatism corrector compensates for the system field astigmatism. Star images formed by the system with the astigmatism corrector are characterized by d0.8=1.''3, which does not meet the present-day requirements. The constant coma followed by the spherical aberration are dominating. The astigmatism is the least distortion of the image. Eliminating the Zeidel aberrations gives d0.8=0.''7, which coincides with manufacturer attestation. An additional adjustment should be made to achieve this image quality. Local wavefront errors including triangular astigmatism are small, which testifies that the unloading and fastening of the mirrors are of a high quality.
Andruk V. M.
Butenko G. Z.
Ivanov Yu. S.
Kuznetsov Victor I.
Parusimov V. G.
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