A single aspheric or freeform lens contains the elements front and backside surface, edges and maybe other reference surfaces or structures. In this paper is demonstrated how a high precision form tester is capable of measuring these elements utilizing an optical and a tactile probe system. The measurements can be used to determine the orientation or alignment of the different surfaces and structures. Different measuring examples are presented and the influence of the measuring uncertainty from the instrument and the measuring strategy are shown. This information may be useful for tolerancing of lenses and an optimization of the production process.

Date Published: 27 September 2016
PDF: 6 pages
Proc. SPIE 9951, Optical System Alignment, Tolerancing, and Verification X, 99510K (27 September 2016); doi: 10.1117/12.2237614

Published in SPIE Proceedings Vol. 9951:
Optical System Alignment, Tolerancing, and Verification X
José Sasián; Richard N. Youngworth, Editor(s)