【作者】 鲍赟；

【导师】 田维坚；

【作者基本信息】 中国科学院研究生院（西安光学精密机械研究所） ， 光学， 2007， 硕士

【摘要】 本文详细介绍了衍射光学、混合光学以及液体变焦透镜的发展状况，根据折衍混合系统的成像特点和焦距与系统结构的关系，提出两种新的液体可变焦折衍透镜模型。传统的液体变焦透镜仍然为折射光学系统，不可避免的存在色差问题。如果用传统的方法来消除色差，仍然会导致系统结构复杂，这在微型变焦器件上很难实现。如果将传统的液体变焦透镜的其中一面设计成二元面，这在变焦的同时能很好地解决色差问题。通过对二元透镜和液体透镜特性的分析，本文设计了两种液体可变焦折衍混合光学系统模型，运用标量衍射模型和几何光学模型分别对模型A和模型B的面形结构，成像特点进行理论推导和运算，并对其系统焦距与折射部分基底面的曲率变化关系进行研究。从仿真计算得出模型A和模型B的面形结构，并且从结果可以看出，当液体折射透镜曲率半径变化时，系统焦距变化曲线在三条波长下重合地较好，达到消除色差的目的。这两种可变焦折衍混合系统模型结构简单、成像质量好，而且在变焦的同时很好地解决了消除色差的问题，可以广泛应用于民用和军事领域。更多还原

【Abstract】 The hybrid diffractive-refractive variable-focus liquid lenses composed of a liquid refractor and a binary optical lens are demonstrated in this letter. Most of the conventional variable-focus liquid lenses play an important role in modern photonic devices and they are used in a wide range of applications such as all kinds of photonic packages. However, the conventional variable-focus liquid lenses have the characteristic of chromatic aberration. With the rapid development of binary optics, we know the color separation properties of binary optic lenses are opposite in sign to those of traditional lenses. Here we demonstrate two types of hybrid diffractive-refractive variable-focus liquid lenses which contain two components, the liquid refractor and the binary optical lens. Unlike other conventional liquid lens, one surface of these lenses is binary optical surface. The lenses being constructed using combined diffractive /refractive elements are propitious to solve the problem of chromatic aberration.In this paper, the function of the surface of the hybrid diffractive-refractive variable-focus liquid lens and the relationship between the changing of focal length and the adjustment of the radius of curvature of the refractive lens are proposed. The simulations show the structure of the hybrid diffractive-refractive variable-focus liquid lens and indicate that the quality performances are better than conventional refractor. From the evaluation of the results, the hybrid diffractive-refractive variable-focus liquid lens presents the simplest and the highest-quality performances. The color aberration is solved well when the focal length of the optical system is changed. In conclusion, the lens we demonstrated is desirable for both civilian and military applications.更多还原