Luo, Chunhua, He Zhang, and Yanhong Li. “Design of Belt-Type Fresnel Lens With Image Surface of Uniform Illuminance”. Journal of Applied Optics 39, no. 1 (June 30, 2018): 7–11. Accessed November 21, 2024. https://appliedopticsjournal.net/index.php/JAO/article/view/2.