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Proceedings Paper

High-resolution telescope encoder
Author(s): Leonel Gutierrez; Carlos Dominguez-Tagle
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Paper Abstract

We describe a speckle-based, telescope-position encoder that overcomes the need the ruled scales and gratings. Using the natural surface markings to produce a speckle pattern, the system is noncontacting and simply aligned. Imaging with a CCD and computing displacements with binary correlation, sub-pixel resolution can be achieved by parabolic approximation. Results of test on the 2-meter telescope at San Pedro Martir are presented.

Paper Details

Date Published: 26 May 1998
PDF: 8 pages
Proc. SPIE 3351, Telescope Control Systems III, (26 May 1998); doi: 10.1117/12.308831
Show Author Affiliations
Leonel Gutierrez, Instituto de Astronomia/Univ. Nacional Autonoma de Mexico (Mexico)
Carlos Dominguez-Tagle, Instituto de Astronomia/Univ. Nacional Autonoma de Mexico (Spain)


Published in SPIE Proceedings Vol. 3351:
Telescope Control Systems III
Hilton Lewis, Editor(s)

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