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二元光学被誉为“90年代的光学”。它是基于光波的衍射理论,利用计算机辅助设计以及超大规模集成电路制作工艺,在基片(或传统光学器件表面)上刻蚀产生具有多个微小台阶深度的浮雕结构,形成纯位相、同轴再现并具有极高衍射效率的一类衍射光学器件。它以多阶位相结构近似相息图的连续浮雕结构。这种平面浮雕结构的二元光学器件具有重量轻、易复制、造价低等特点,而且在实现微小、阵列、集成以及任意波面变换等功能方面独具优势,从而使光学工程与技术在空间技术、激光加工、计算技术与信息处理、光纤通信及生物医学等众多领域中显示出重要作用及广阔的应用前景。以下简介我们所研究的几种有代表性的二元光学器件。
Binary optics is known as “Optics of the 90’s”. It is based on the diffraction theory of light waves, using computer-aided design and VLSI manufacturing process, etching on the substrate (or conventional optical device) to produce a relief structure with multiple small step depths to form pure phase, coaxial A class of diffractive optical devices that reproduce and have extremely high diffraction efficiency. It uses a multi-stage phase structure approximation phase diagram continuous relief structure. This planar relief structure of the binary optics features light weight, easy to copy, low cost, and in the realization of tiny, array, integrated and arbitrary wavefront transform and other functions unique advantages, so that optical engineering and technology in space technology , Laser processing, computing technology and information processing, optical fiber communication and biomedicine and other fields have shown an important role and broad prospects for the future. The following is a brief introduction of several representative binary optics we have studied.