Development of Wide Angle Fovea Sensor with Variable Magnification w/o Mechanical Parts

为了达到本研究的目的，研究者设计并制作了一个液晶广角中心凹透镜的原型，其中间核心透镜部分使用两个液晶透镜单元，输入透镜部分和输出透镜部分使用传统透镜材料制成的固体透镜。输入透镜部分具有从具有广角视场和高远心特性的宽转换透镜改进的结构。该设计结构具有以下优点：（1）输入透镜部分具有小的透镜放大率，使得可以很大程度地改变整个透镜系统的放大率。(2)输出侧LC透镜单元校正光线的折射，以便不仅根据由输入侧LC透镜单元控制的复杂的放大率分布灵活地聚焦在像平面上，而且保持到像平面的长度恒定。换句话说，尽管每个透镜部分的位置是固定的，即，所设计的结构实现了更好的光学性能。e.没有机械部件。

The researcher has designed and produced a prototype of a Liquid Crystal(LC) Wide Angle Fovea(WAF) lens as using 2 LC lens cells in its intermediate core lens part and using solid lenses made of conventional lens materials as its input lens part and output lens part, in order to achive this study's purpose. The input lens part has a structure inproved from a wide conversion lens which has a wide angle field of view and a high telecentric property. The designed structure gives us the following adavantages ; (1) The input lens part having small lens power makes it possible to change magnification of the entire lens system largely. (2) The output-sided LC lens cell corrects refraction of rays in order not only to focus on the image plane flexibly according to complicated distribution of magnification controlled by the input-sided LC lens cell but also to keep a length to the image plane constant. In other words, the desiged sturucture achieves better optical performance although positions of each lens part are fixed, i. e. without mechanical parts.