Abstract

In this paper we propose a method to design a freeform lens including the effect of Fresnel reflections on the transmitted intensity. This method is elaborated for a lens with one freeform surface shaping a far-field target from a point source or collimated input beam. It combines the optical mapping with the energy balance incorporating the loss due to Fresnel reflections, which leads to a generalized Monge–Ampère equation. We adapt a least-squares solver from previous research to solve the model numerically. This is then tested with a theoretical example and a test case related to road lighting.

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Fresnel reflections in inverse double freeform lens design

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Generating-function approach for double freeform lens design

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Opt. Express 29(16) 25605-25625 (2021)

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Zexin Feng, Dewen Cheng, and Yongtian Wang
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