Specification of aspherical surfaces used as refractive elements in micro-optical systems

Jeremy Béguelin; Toralf Scharf; Wilfried Noell; Reinhard Voelkel

doi:10.1117/12.2528636

30 August 2019 Specification of aspherical surfaces used as refractive elements in micro-optical systems

Jeremy Béguelin, Toralf Scharf, Wilfried Noell, Reinhard Voelkel

Proceedings Volume 11103, Optical Modeling and System Alignment; 1110309 (2019) https://doi.org/10.1117/12.2528636
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

The optical performance of refractive plano-convex microlenses is mainly related to the quality of their (a)spherical surface. An efficient tolerancing of this surface is a key step towards the manufacturing of high quality microlenses. However, we demonstrate that the intuitive approach based on geometric parameters such as radius of curvature, conic constant and irregularity is ineffective. We thus propose to use common optical figures of merit, RMS spot size and wavefront aberration, to specify the surface. Not much complexity is added since both quantities can be expressed as analytical functions of the surface in the case of plano-convex microlenses. Such surface specification via direct evaluation of the optical performance offers a better control of the microlens quality.

Conference Presentation

Citation Download Citation

Jeremy Béguelin, Toralf Scharf, Wilfried Noell, and Reinhard Voelkel "Specification of aspherical surfaces used as refractive elements in micro-optical systems", Proc. SPIE 11103, Optical Modeling and System Alignment, 1110309 (30 August 2019); https://doi.org/10.1117/12.2528636

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