中国激光, 2010, 37 (8): 1972, 网络出版: 2010-08-13
双透镜系统光束整形元件的设计制作
Design and Preparation of Diffraction Optical Element in Dual Lens System
光学制造 衍射光学元件 光束整形 双透镜系统 迭代算法 optical fabrication diffractive optical element beam shaping dual lens iterative algorithm
摘要
提出了一种基于双透镜系统的衍射光学元件(DOE)设计方法。在双透镜系统中,光束的传输和聚焦需要用两次菲涅耳衍射来表示,为了加快计算速度,将菲涅耳公式转化为包含快速傅里叶变换的形式来使传统的迭代算法满足不同的设计环境需求。用此设计方法,在理论上得到了超过90%的衍射效率,并对由此方法设计出的元件进行了加工制作和实验测试,测试结果显示,达到了预期的光束整形效果,对于更加复杂系统的DOE设计有一定的参考价值,对高功率激光系统可能存在潜在功用。
Abstract
A design method of diffractive optical elements (DOE) based on dual-lens system is proposed. In the dual-lens system,the transmission and focusing of the beam need to be expressed by twice Fresnel diffraction,in order to accelerate the computing speed,we converted the Fresnel formula to the form of which contains fast Fourier transform so that the traditional iterative algorithm can meet the different design environments. By using this design method,we get the diffraction efficiency more than 90% in theory,and processes the element and make the experimental test,the effect of beam shaping that we expected is achieved. It is worthwhile,for more complex system of DOE design there,and there may be potential function for the high-power laser systems.
李珂, 石鹏, 张晓波, 王声波, 黄坤, 李永平. 双透镜系统光束整形元件的设计制作[J]. 中国激光, 2010, 37(8): 1972. Li Ke, Shi Peng, Zhang Xiaobo, Wang Shengbo, Huang Kun, Li Yongping. Design and Preparation of Diffraction Optical Element in Dual Lens System[J]. Chinese Journal of Lasers, 2010, 37(8): 1972.