28 May 2018 Designing two freeform surfaces with Monge–Ampère equation method for point-like sources
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Two freeform surfaces provide more degrees of freedom in designing illumination optics and can yield a better solution. The existing methods for point-like sources are mostly valid in designing one freeform surface. Designing two freeform surfaces for point-like sources still remains a challenging issue. In this letter we develop a general formulation of designing two freeform lens surfaces for point-like sources. The proposed method is very robust in designing freeform lenses with two elaborately designed surfaces. The examples clearly show that using two freeform surfaces yields better solutions to challenging illumination problems with ultra-high energy efficiency.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rengmao Wu, Rengmao Wu, Shengqian Chang, Shengqian Chang, Zhanghao Ding, Zhanghao Ding, Zhenrong Zheng, Zhenrong Zheng, "Designing two freeform surfaces with Monge–Ampère equation method for point-like sources", Proc. SPIE 10693, Illumination Optics V, 1069306 (28 May 2018); doi: 10.1117/12.2309752; https://doi.org/10.1117/12.2309752


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