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Proceedings Paper

Criterion to appreciate difficulties of aspherical polishing
Author(s): Christian du Jeu
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Paper Abstract

The increase of optical resolution and size of astronomical telescopes needs to: (1) Improve surface quality of optical components. (2) Use more and more complex aspherical shape for lenses and mirrors. Due to these 2 constraints, the optical manufacturers had to improve theirs equipments such as the Computer Controlled Polishing and to appreciate the feasibility of very complex aspherical shape. Concerning this second point, we propose a new criterion based on surface definition, on quality specification for the polishing and on limitations of equipments. Manufacturing examples show that this criterion is well representative, and particularly for direct off-axis polishing.

Paper Details

Date Published: 24 September 2004
PDF: 9 pages
Proc. SPIE 5494, Optical Fabrication, Metrology, and Material Advancements for Telescopes, (24 September 2004); doi: 10.1117/12.551420
Show Author Affiliations
Christian du Jeu, Societe Europeenne de Systemes Optiques (France)

Published in SPIE Proceedings Vol. 5494:
Optical Fabrication, Metrology, and Material Advancements for Telescopes
Eli Atad-Ettedgui; Philippe Dierickx, Editor(s)

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