A pentaprism-based opto-mechanical alignment method for Nasmyth telescopes, such as the 4m SOAR telescope and the LSST's 1.2m auxiliary telescope

Roberto Tighe; Mario Rivera; Patricio Schurter; Freddy Muñoz; Rolando Cantarutti; José Piracés; Jacques Sebag

doi:10.1117/12.2561043

13 December 2020 A pentaprism-based opto-mechanical alignment method for Nasmyth telescopes, such as the 4m SOAR telescope and the LSST's 1.2m auxiliary telescope

Roberto Tighe, Mario Rivera, Patricio Schurter, Freddy Muñoz, Rolando Cantarutti, José Piracés, Jacques Sebag

Author Affiliations +

Proceedings Volume 11445, Ground-based and Airborne Telescopes VIII; 114458G (2020) https://doi.org/10.1117/12.2561043
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The optical axis of a Nasmyth telescope should be perpendicular to the Elevation axis and pass through the rotational center of the Tertiary mirror turret rotator. Realized by aligning a laser beam to the rotational center of the two field derotators. A high precision Pentaprism mounted on the Tertiary mirror rotator deviates the laser beam by 90° defining the optical axis onto which the Primary and Secondary mirrors are mounted and aligned. We present method, procedure, tools and results for two examples of Nasmyth Telescopes; the 4.1m SOAR and the LSST's 1.2m Auxiliary Telescope.

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Roberto Tighe, Mario Rivera, Patricio Schurter, Freddy Muñoz, Rolando Cantarutti, José Piracés, and Jacques Sebag "A pentaprism-based opto-mechanical alignment method for Nasmyth telescopes, such as the 4m SOAR telescope and the LSST's 1.2m auxiliary telescope", Proc. SPIE 11445, Ground-based and Airborne Telescopes VIII, 114458G (13 December 2020); https://doi.org/10.1117/12.2561043

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