Aspherical manufacturing in terms of accuracy, efficiency, and surface forms based on practical experiences

Sven R. Kiontke; Ralf Steinkopf

doi:10.1117/12.799487

25 September 2008 Aspherical manufacturing in terms of accuracy, efficiency, and surface forms based on practical experiences

Sven R. Kiontke, Ralf Steinkopf

Author Affiliations +

Proceedings Volume 7102, Optical Fabrication, Testing, and Metrology III; 71020D (2008) https://doi.org/10.1117/12.799487
Event: Optical Systems Design, 2008, Glasgow, Scotland, United Kingdom

Abstract

Within the past ten years a variety of CNC manufacturers for aspherical surfaces have been established. The field of applications they are working for are very different. The way CNC manufacturers measure surfaces as well as the way they characterize the surface form deviation differs even more. Furthermore, there are a lot of customers being interested in using aspherical surfaces in their applications. In fact, aspherical lenses are not established as standard optical elements yet which is due to the fact that many users are not familiar with the implications of the use of aspherical surfaces with respect to the tolerancing of the optical system. Only few know how to specify an asphere, moreover, they differ about how to do that. The paper will give an insight in what is possible in aspherical manufacturing in terms of accuracy, efficiency, number of pieces per design and surface forms. An important issue is the development of deviation of form and slope in connection to prepolishing and correction polishing. Based on experiences of the manufacture of more than 500 different aspherical designs with diameters ranging from 3 - 200 mm, the paper is going to give an insight into production practices. Finally, there will be a general overview on what could be done and what needs to be done in order to unify the different ways of tolerancing of aspherical surfaces.

Citation Download Citation

Sven R. Kiontke and Ralf Steinkopf "Aspherical manufacturing in terms of accuracy, efficiency, and surface forms based on practical experiences", Proc. SPIE 7102, Optical Fabrication, Testing, and Metrology III, 71020D (25 September 2008); https://doi.org/10.1117/12.799487

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