Free-form surface lens planned by using fitting of upper and lower bounds of function

• Main Authors: CHOSHO ISHI, HUANG YUHAN, WANG YUANQING
• Format: Patent
• Language: Chinese; English
• Published: 22.03.2024
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

According to the free-form surface lens, planning is carried out through fitting of the upper bound and the lower bound of the function, the lens structure can achieve uniform illumination of a light source at a large angle for the light source in Gaussian distribution through shaping of light intensity space distribution and energy adjustment, and therefore the requirements of a TOF camera, uniform illumination and the like are met. According to the design method provided by the invention, a planning thought is added, the problem that the lens is difficult to design due to the fact that Gaussian distribution light beam energy cannot be integrated is solved, the convergence speed is high, and the designed free-form surface is smooth and continuous. 本发明提供一种利用函数上下界拟合进行规划的自由曲面透镜，该透镜结构能针对高斯分布的光源，通过对光强空间分布的整形以及能量调整，实现大角度下光源均匀照明，以满足如TOF相机、均匀照明等方面的需求。本发明提供的设计方法加入了规划的思想，解决了因高斯分布的光束能量无法积分而难以设计透镜的问题，收敛速度快，设计的自由曲面面型光滑连续。