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Proceedings Paper

Design of freeform optics for an ophthalmological application
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Paper Abstract

Optical freeform surfaces are gaining importance in different optical applications. A huge demand arises e.g. in the fields of automotive and medical engineering. Innovative systems often need high-quality and high-volume optics. Injectionmoulded polymer optics represents a cost-efficient solution. However, it has to be ensured that the tight requirements with respect to the system’s performance are met by the replicated freeform optics. To reach this goal, it is not sufficient to only characterise the manufactured optics by peak-to-valley or rms data describing a deviation from the nominal surface. Instead, optical performance of the manufactured freeform optics has to be analysed and compared with the performance of the nominal surface. This can be done by integrating the measured surface data of the manufactured freeform optics into the optical simulation model. The feedback of the measured surface data into the model allows for a simulation of the optical performance of the optical subsystem containing the real freeform optics manufactured. Hence, conclusions can be drawn as to whether the specifications with respect to e.g. imaging quality are met by the real manufactured optics. This approach will be presented using an Alvarez-Humphrey optics as an example of a tuneable optics of an ophthalmological application. The focus of this article will be on design for manufacturing the freeform optics, the integration of the measured surface data into the optical simulation model, simulation of the optical performance, and analysis in comparison to the nominal surface.

Paper Details

Date Published: 1 May 2014
PDF: 11 pages
Proc. SPIE 9131, Optical Modelling and Design III, 913108 (1 May 2014); doi: 10.1117/12.2051413
Show Author Affiliations
Ingo Sieber, Karlsruher Institut für Technologie (Germany)
Allen Yi, The Ohio State Univ. (United States)
Likai Li, The Ohio State Univ. (United States)
Erik Beckert, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Ralf Steinkopf, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Ulrich Gengenbach, Karlsruher Institut für Technologie (Germany)

Published in SPIE Proceedings Vol. 9131:
Optical Modelling and Design III
Frank Wyrowski; John T. Sheridan; Jani Tervo; Youri Meuret, Editor(s)

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