Design of refractive/diffractive hybrid optical elements for beam shaping with large diffraction pattern  

作　　者：曲卫东 顾华荣 谭峭峰 

机构地区：[1]State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instruments, Tsinghua University

出　　处：《Chinese Optics Letters》2016年第3期64-67,共4页中国光学快报（英文版）

基　　金：partially supported by the National Key Basic Research Program of China(No.2013CB329202);the National Scientific Equipment Development SpecialFoundation of China(No.2011YQ03013401);the National Natural Science Foundation of China(No.61475021);the Beijing Natural Science Foundation(No.4152015)

摘　　要：Diffractive optics is an important technique for beam shaping with high light efficiency and strong diffraction pattern flexibility. Since the diffraction angle is limited by the unit size of the diffractive optical element （DOE）, the size of the required diffraction pattern is always rather small. In this Letter, refractive/diffractive hybrid optical elements （RDHOEs） consisting of a DOE and a lens are used to realize beam shaping for a large diffraction pattern. The lens, as the component of the RDHOEs, can not only be concave but also convex, and the double sampling Fresnel diffraction algorithm is developed for the design of these two types of RDHOEs. The simulation and experimental results provide solid evidence to demonstrate the proposed method with the pure phase spatial light modulator.Diffractive optics is an important technique for beam shaping with high light efficiency and strong diffraction pattern flexibility. Since the diffraction angle is limited by the unit size of the diffractive optical element （DOE）, the size of the required diffraction pattern is always rather small. In this Letter, refractive/diffractive hybrid optical elements （RDHOEs） consisting of a DOE and a lens are used to realize beam shaping for a large diffraction pattern. The lens, as the component of the RDHOEs, can not only be concave but also convex, and the double sampling Fresnel diffraction algorithm is developed for the design of these two types of RDHOEs. The simulation and experimental results provide solid evidence to demonstrate the proposed method with the pure phase spatial light modulator.

关 键 词：Diffraction patterns Diffractive optical elements INTERFEROMETRY Lenses LIGHT Light modulators 

分 类 号：O436.1[机械工程—光学工程] TN248.4[理学—光学]