Machining and Measuring of an Off-axis Paraboloid

Uwe Birnbaum; Roland Schreiner

doi:10.1117/12.625114

19 October 2005 Machining and measuring of an off-axis paraboloid

Uwe Birnbaum, Roland Schreiner

Proceedings Volume 5965, Optical Fabrication, Testing, and Metrology II; 59650T (2005) https://doi.org/10.1117/12.625114
Event: Optical Systems Design 2005, 2005, Jena, Germany

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.

Citation Download Citation

Uwe Birnbaum and Roland Schreiner "Machining and measuring of an off-axis paraboloid", Proc. SPIE 5965, Optical Fabrication, Testing, and Metrology II, 59650T (19 October 2005); https://doi.org/10.1117/12.625114

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