环型孔径折叠型超薄镜头

Ultrathin lenses using annular folded optics

介绍一种环型孔径光路折叠型超薄光学镜头,可以在有限厚度和体积内得到较长的焦距。光线通过镜头最外面的环形孔径进入光学系统,然后再通过一系列的同轴环形非球面反射镜反射聚焦在光学系统的像面上,实现了光学系统的大口径与超薄特性。此系统具有小型系统的紧凑性优势和大型系统的成像性能优势。文中对此类光学镜头进行了优化设计,并给出了像质评价结果。此系统适用于对光学镜头体积和质量要求比较严格、传统成像系统不适用的情况。

A special ultrathin camera using annular folded optics was introduced, which had potential for compact imagers. Their long focal lengths can be contained within a limited track. Light entered the optical system through an outer annular aperture and was focused by a series of concentric zone aspherical reflectors to the image plane. It was an approach to implement high sample resolution imaging, large aperture and ultrathin characteristic at the same time. This optic had the advantages of both the compactness of miniature cameras and the high imaging quality of large cameras. In this paper, the principle, structure, and design method of the ultrathin camera were introduced. An optimized design and its performance evaluation were reported. Such camera can be applied to the situation where the bulk and mass are so limited that conventional imaging systems are unsuitable.