Freeform Surface for Non-image Optics

• Main Authors: Tsai, Yu-Lin, 蔡玉麟
• Other Authors: Tien,Chung-Hao
• Format: Others
• Language: en_US
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/64076648144291730806

博士 === 國立交通大學 === 光電工程研究所 === 104 === In this thesis, we propose freeform design model for constructing a single refractor (or reflector) surface under a predefined geometry. The freeform model based on energy conservation and ray propagation law can be characterized by a nonlinear partial differential equation (PDE) under the small planar approximation. The nonlinear PDE can be solved by finite element method with high order element to satisfy the condition of continuity (1st -order) and smoothness (2nd - order). To validate the proposed methodology, we use commercial software LightTools® , to evaluate the illumaninance performance via designed freeform engine in realization of uniform and non-uniform illuminance distribution on the planar.