非相干LED白光产生无衍射光的光源设计

非相干光源产生无衍射光束的实验中，入射光束的均匀性对产生无衍射光束的质量有很大影响。文中以非相干光源白光LED为例，通过对LED自身发光特性的分析，对光线传播过程进行数学建模，用非成像光学光通量守恒原理，对均匀照明设计方法进行理论推导，得到了一种基于非成像光学产生均匀光束的透镜设计方法。用三维建模软件进行建模并用光学仿真软件进行光线追迹，确定用该方法设计的透镜能满足实验对入射光束均匀度的要求，并初步实验获得较高质量的零阶无衍射Bessel光，验证了该设计方法的合理性。

Design of incoherent light source LED for generating non-diffracting beams

In the experiment of the incoherent light source generating non-diffracting beams, the uniformity of the incident beams for generating high quality non-diffracting beams is significant. In this paper, incoherent white light LED was used as the light source. The propagation of light was simulated through analyzing the characteristics of LED light and design of uniform illumination was deduced in theory according to the conservation of light. Hence, the lens design method was obtained which could generate the uniform beam based on the non-imaging optics. With optical simulation software and ray tracing, it is shown that the design meets the requirement of uniformity of incident beams, and meanwhile, the rationality of design is demonstrated by the experimental result that high quality zero-order Bessel beam can be obtained with uniform distribution of beam intensity.