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Proceedings Paper

Machining and Measuring of an Off-axis Paraboloid
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Paper Abstract

Off-axis paraboloids provide sophisticated challenges in both machining and measuring. There are 2 accepted approaches for manufacturing off-axis paraboloids. In method one, a rotationally symmetrical part is shaped and polished with subsequent separating the off-axis elements from the block. On the other hand, one can machine the single parts right from the start. In this case the surface is kind of free-form. In this paper we report on the manufacturing of mirrors for both methods. Special attention is paid to machining and measuring. The fabrication process consists of iteration steps. The polishing step can remove the remaining shape error of the mirror surface itself or the wave front of the system.

Paper Details

Date Published: 19 October 2005
PDF: 5 pages
Proc. SPIE 5965, Optical Fabrication, Testing, and Metrology II, 59650T (19 October 2005); doi: 10.1117/12.625114
Show Author Affiliations
Uwe Birnbaum, JENOPTIK Laser, Optik, Systeme GmbH (Germany)
Roland Schreiner, JENOPTIK Laser, Optik, Systeme GmbH (Germany)

Published in SPIE Proceedings Vol. 5965:
Optical Fabrication, Testing, and Metrology II
Angela Duparré; Roland Geyl; Lingli Wang, Editor(s)

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