Paper
5 November 2018 Optimizing double freeform surfaces for reducing deviations in ray-mapping method
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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.
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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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KEYWORDS
Ray tracing

Freeform optics

Light emitting diodes

Geometrical optics

Lens design

Optical design

Light sources and illumination

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