双波长共焦衍射光学元件分析与设计

Analysis and Design of Double Wavelength Co-Focus Diffractive Optical Element

报道二维纯位相环带衍射光学透镜的研究。结果表明，在确定位置的像平面的光强分布呈现相当理想的光聚焦作用；同时以１．０６μｍ和０．６３２８μｍ两种波长为例，对双波长二维成像的环带衍射透镜进行分析计算，结果表明二种波长的光束都能聚焦于同一像平面。这种元件可方便地用于非可见激光（例如１．０６μｍ或１０．６μｍ）中的对焦与光路调整。

The study of plane pure-phase equi-width ring diffractive optical lenses is reported. The analysis and design methods of two-dimensional imaging double wavelength co-focus diffractive optical lens are also presented. The light intensity distributions show that it is a new type of ideal focusing optical element. Two light beams at 1. 06 μm and 0. 6328 μm can be focused on same focal plane by using this optical element. It may be used for focalization and alignment of invisible beam lasers such as 1. 06 μm and 10. 6 μm.