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针对半导体光源不易均匀散射到一定的角度范围或均匀照射到确定平面上的问题,本文利用非成像光学方法设计了一种基于微透镜阵列的均匀散射透镜。该散射透镜由相同面元的微透镜周期性密排而成,微透镜单元为单曲面,根据不同应用,曲面面形可设计成不同的非球面形式。介绍了凸形、前曲面单片微透镜阵列的设计方法,并结合一些应用举例显示了该设计方法的可行性。最后讨论了凹凸面形、前后曲面微透镜阵列各自的应用场合及优缺点。
Aiming at the problem that the semiconductor light source can not be uniformly scattered to a certain angle range or be uniformly irradiated onto a certain plane, a non-imaging optical method is used to design a uniform scattering lens based on a microlens array. The scattering lens is formed by the periodic close-packed microlenses of the same briquette. The micro-lens unit is a single curved surface. According to different applications, the curved surface can be designed into different aspheric forms. The design method of convex and front curved monolithic microlens array is introduced, and the feasibility of the design method is demonstrated with some application examples. Finally, the applications, advantages and disadvantages of each of the concave and convex surfaces, the front and back curved microlens arrays are discussed.