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Proceedings Paper

Phasing a segmented mirror using the subapertures method
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Paper Abstract

At the present time, some astronomical telescopes exist with segmented primary mirrors, as those located in Mauna Kea, Hawai. The Keck telescopes are a classical example. With the purpose of collecting light of weak stellar objects, it is necessary to control the segments of the primary mirror of the telescope, so that whole mirror works as a monolithic mirror. In this paper, it is proposed the subapertures method for the alignment of the segments of the primary mirror. The subapertures method finds tilt, tip, and pistons effects or longitudinal displacements as the defocus error; all of them are necessary to achieve the fitting of a series of measurements. It is shown the experimental results for a parabolic mirror divided in two segments using the proposed method; for this case, the particular equations were developed as well as the necessary software for the alignment of the two parts. The experimental results were obtained in a controlled situation in the laboratory. The alignment process is achieved in a short time, and furthermore is an interactive process.

Paper Details

Date Published: 14 February 2005
PDF: 7 pages
Proc. SPIE 5776, Eighth International Symposium on Laser Metrology, (14 February 2005); doi: 10.1117/12.611869
Show Author Affiliations
Fausto Escobar-Romero, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
Fermin-Solomon Granados-Agustin, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
Alejandro Cornejo-Rodriguez, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)


Published in SPIE Proceedings Vol. 5776:
Eighth International Symposium on Laser Metrology
R. Rodriguez-Vera; F. Mendoza-Santoyo, Editor(s)

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