Minimizing polishing times in asphere production by ultra-precision grinding

Armin Rumpel; Florian Enderli

doi:10.1117/12.2631761

15 July 2022 Minimizing polishing times in asphere production by ultra-precision grinding

Armin Rumpel, Florian Enderli

Proceedings Volume 12298, Ninth European Seminar on Precision Optics Manufacturing; 1229804 (2022) https://doi.org/10.1117/12.2631761
Event: Ninth European Seminar on Precision Optics Manufacturing, 2022, Teisnach, Germany

Abstract

Chemo-mechanical polishing processes that are used to remove grinding marks are a major cost driver in asphere production. Especially when machining glasses that are prone to fracture from grinding subsurface damage can be substantial. As a result, subsequent polishing times can be extremely high. In order to reduce polishing times and increase process stability SwissOptic established an ultra-precision grinding process. Here, we compare process times and surface figure errors for two processes. The first process represents a standard process in asphere production with grinding, polishing and fine correction. The second process adds an ultraprecision grinding step before polishing. As a result, we find that cumulative process times and resulting figure errors are much lower if we apply ultra-precision grinding.

Citation Download Citation

Armin Rumpel and Florian Enderli "Minimizing polishing times in asphere production by ultra-precision grinding", Proc. SPIE 12298, Ninth European Seminar on Precision Optics Manufacturing, 1229804 (15 July 2022); https://doi.org/10.1117/12.2631761

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