Optimizing double freeform surfaces for reducing deviations in ray-mapping method

Haotian Xu; Zexin Feng; Dewen Cheng; Yongtian Wang

doi:10.1117/12.2501083

5 November 2018 Optimizing double freeform surfaces for reducing deviations in ray-mapping method

Haotian Xu, Zexin Feng, Dewen Cheng, Yongtian Wang

Proceedings Volume 10815, Optical Design and Testing VIII; 108151B (2018) https://doi.org/10.1117/12.2501083
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

Ray mapping method can greatly simplify the freeform illumination lens design. However, the result obtained by the ray mapping method sometimes deviates much from the design target. Therefore, we present a construction of double freeform surfaces based on nonlinear least squares and non-uniform rational B-spline surfaces (NURBS) to minimize the deviations. By this way, we can get a smooth double-freeform-surface lens with good optical performance.

Citation Download Citation

Haotian Xu, Zexin Feng, Dewen Cheng, and Yongtian Wang "Optimizing double freeform surfaces for reducing deviations in ray-mapping method", Proc. SPIE 10815, Optical Design and Testing VIII, 108151B (5 November 2018); https://doi.org/10.1117/12.2501083

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