Centering the secondary mirror of the TIRGO telescope

Details Centering the secondary mirror of the TIRGO telescope Centering the secondary mirror of the TIRGO telescope

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apopt..19.2520g&link_type=abstract

Applied Optics, vol. 19, Aug. 1, 1980, p. 2520-2523.

Physics

Optics

Cassegrain Optics, Infrared Telescopes, Mirrors, Accuracy, Design Analysis, Hyperbolas, Shapes

Scientific paper

A procedure for centering the secondary mirror of a Cassegrainian telescope on its mechanical mount has been devised, using the classical principle of observing the movement of a reflected image when the mirror is rotated. The centering is obtained by iteration, keeping the reflecting surface in contact with a circular centered edge. The achievable accuracy, accounting for the change in the hyperboloid shape of the mirror from a sphere, has been calculated; the theoretical values were checked using the procedure for centering the secondary mirror of the Tirgo infrared telescope.

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