二元变焦内窥镜光学系统设计

根据高斯光学原理,以液体透镜为核心元件,研究了无移动镜组变焦系统的设计方法。从医用内窥镜的使用要求出发,设计了一种二元变焦内窥镜系统。该系统可通过气压或液压控制液体透镜表面曲率变化,实现1.5倍变倍比,在1.8 mm和2.7 mm焦距下都获得了良好的成像质量。

A Method of Bifocal Zoom Endoscope System Design

Tunable-focus liquid lens is considered as a kind of novel device based on biological vision system, which has many advantages such as little volume and weight, easy to be integrated and active zooming. A method of designing zoom optical system without moving lens is demonstrated accoding the theory of Gaussian optics, in which the liquid lenses are used as core elements. And a bifocal zoom endoscope system is presented, in which the curvature of the liquid lens can be controlled by air pressure or hydraulic pressurethe. A zooming factor of 1.5 is realized. And the acceptable imaging quality is gotten at both focal length of 1.8mm and 2.7mm of the system.