光学学报, 2018, 38 (5): 0505004, 网络出版: 2018-07-10  

LED焦散光束的传输特性 下载: 1101次

Transmission Characteristics of LED Caustic Beam
作者单位
华侨大学信息科学与工程学院,福建省光传输与变换重点实验室, 福建 厦门 361021
摘要
利用LED光源产生焦散光束,并应用交叉谱密度函数及多光谱叠加的原理计算了轴棱锥后LED部分相干焦散光束的光强分布。理论分析和实验结果验证了像散等参量对焦散光束的影响。通过研究传输距离对LED焦散光束的影响发现,随着传输距离增大,焦散光束星状外轮廓尺寸变大,中心光斑逐渐向外环对称分裂,同时中心光强相应减弱,光点阵列衬比度逐渐降低,最终将演化成近似空心光束。研究结果丰富了焦散光束的内涵,为LED焦散光束的实际应用提供了理论基础和实验依据。
Abstract
The LED caustic beam is generated by LED light source. A method of using cross-spectral density function and superposition of multi-spectral is proposed to calculate the intensity distribution of the LED caustic beam through the axicon. The influence of parameters such as dispersion on caustic beam is theoretically and experimentally demonstrated. The influence of the transmission distance on the LED caustic beam is further studied. It is found that the outer contour of the caustic beam becomes larger and the central light spots symmetrically split into light spot array as the transmission distance increases. Meanwhile, the central intensity decreases correspondingly, and the contrast of the light spot array decreases gradually. It will evolve into an approximately hollow beam eventually. This research results enrich the connotation of caustic beam, and provide a theoretical basis and experimental evidence for the practical application of LED caustic beam.

杨艳飞, 吴逢铁, 朱清智, 胡润. LED焦散光束的传输特性[J]. 光学学报, 2018, 38(5): 0505004. Yanfei Yang, Fengtie Wu, Qingzhi Zhu, Run Hu. Transmission Characteristics of LED Caustic Beam[J]. Acta Optica Sinica, 2018, 38(5): 0505004.

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