Polishing and testing of the 1.5 m SiC M1 mirror of the ALADIN instrument on the ADM-Aeolus satellite of ESA

Tapio Korhonen; Perttu Keinanen; Mikko Pasanen; Aimo Sillanpaa

doi:10.1117/12.797730

25 September 2008 Polishing and testing of the 1.5 m SiC M1 mirror of the ALADIN instrument on the ADM-Aeolus satellite of ESA

Tapio Korhonen, Perttu Keinanen, Mikko Pasanen, Aimo Sillanpaa

Author Affiliations +

Proceedings Volume 7102, Optical Fabrication, Testing, and Metrology III; 710219 (2008) https://doi.org/10.1117/12.797730
Event: Optical Systems Design, 2008, Glasgow, Scotland, United Kingdom

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.

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Tapio Korhonen, Perttu Keinanen, Mikko Pasanen, and Aimo Sillanpaa "Polishing and testing of the 1.5 m SiC M1 mirror of the ALADIN instrument on the ADM-Aeolus satellite of ESA", Proc. SPIE 7102, Optical Fabrication, Testing, and Metrology III, 710219 (25 September 2008); https://doi.org/10.1117/12.797730

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