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Proceedings Paper

Polishing and testing of the 1.5 m SiC M1 mirror of the ALADIN instrument on the ADM-Aeolus satellite of ESA
Author(s): Tapio Korhonen; Perttu Keinanen; Mikko Pasanen; Aimo Sillanpaa
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Paper Abstract

The Aladin instrument on the ADM-Aeolus satellite of ESA has a parabolic M1 mirror of silicon carbide (SiC) with diameter of 1.5 m, fast focal ratio of f/0.9 and light-weighting to 25 kg/m2. The lidar instrument is operated at the near ultraviolet wavelength of 355 nm, which requires high optical quality and good smoothness of the polishing finish. In this paper we present descriptions of the testing and polishing methods used during ALADIN M1 lapping and polishing to the specified wave front shape accuracy <150 nm rms and surface micro roughness < 5 nm rms.

Paper Details

Date Published: 25 September 2008
PDF: 7 pages
Proc. SPIE 7102, Optical Fabrication, Testing, and Metrology III, 710219 (25 September 2008); doi: 10.1117/12.797730
Show Author Affiliations
Tapio Korhonen, Opteon Oy (Finland)
Perttu Keinanen, Opteon Oy (Finland)
Mikko Pasanen, Opteon Oy (Finland)
Aimo Sillanpaa, Tuorla Observatory, Univ. of Turku (Finland)

Published in SPIE Proceedings Vol. 7102:
Optical Fabrication, Testing, and Metrology III
Angela Duparré; Roland Geyl, Editor(s)

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