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Proceedings Paper

The classical Ronchi test for piston detection
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Paper Abstract

We propose a method for piston errors detection in a segmented surface by means of the classical ronchi test. This consists in comparing the ronchigram fringes frequency of a reference and piston segment. The comparison is developed for the correlation method of the intensity vs pixels curves of the reference and piston segment. The presence of the piston term in a ronchigram is assured experimentally for the shack interferometer, it is by observing the coincidence rings centered type fizeau in each segment. The proposed method is applied to a segmented spherical surface with a two segment mirrors, and resolutions of piston ⩾63 ηm are experimentally obtained.

Paper Details

Date Published: 4 February 2003
PDF: 6 pages
Proc. SPIE 4837, Large Ground-based Telescopes, (4 February 2003); doi: 10.1117/12.458682
Show Author Affiliations
Javier Salinas, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
Esteban Luna-Aguilar, Instituto de Astronomia/Univ. Nacional Autonoma de Mexico (Mexico)
Luis Salas, Instituto de Astronomia/Univ. Nacional Autonoma de Mexico (Mexico)
Alejandro Cornejo, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
I. Cruz Torres, Instituto de Astronomia/Univ. Nacional Autonoma de Mexico (Mexico)
Victor M. Garcia, Instituto de Astronomia/Univ. Nacional Autonoma de Mexico (Mexico)


Published in SPIE Proceedings Vol. 4837:
Large Ground-based Telescopes
Jacobus M. Oschmann; Larry M. Stepp, Editor(s)

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