Design of freeform optics for an ophthalmological application

Ingo Sieber; Allen Yi; Likai Li; Erik Beckert; Ralf Steinkopf; Ulrich Gengenbach

doi:10.1117/12.2051413

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1 May 2014 Design of freeform optics for an ophthalmological application

Ingo Sieber, Allen Yi, Likai Li, Erik Beckert, Ralf Steinkopf, Ulrich Gengenbach

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Proceedings Volume 9131, Optical Modelling and Design III; 913108 (2014) https://doi.org/10.1117/12.2051413
Event: SPIE Photonics Europe, 2014, Brussels, Belgium

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.

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Ingo Sieber, Allen Yi, Likai Li, Erik Beckert, Ralf Steinkopf, and Ulrich Gengenbach "Design of freeform optics for an ophthalmological application", Proc. SPIE 9131, Optical Modelling and Design III, 913108 (1 May 2014); https://doi.org/10.1117/12.2051413

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