Yasui Masahiko, Watanabe Yoshihiro, Ishikawa Masatoshi
Opt Express. 2021 Apr 12;29(8):12066-12080. doi: 10.1364/OE.418729.
To obtain a large viewing angle in conventional projection-type integral photography frameworks, multiple projectors need to be arranged at a particular angle to a lens array. Hence, the systems require a large space. This paper proposes a system that achieves a large viewing angle in a space-saving manner by using curved mirrors that face each other. To this end, a projector is placed directly behind a lens array, and curved mirrors are installed to surround the rays from the projector. The incident angle toward the lens array increases after there are multiple reflections between the mirrors, which increases the viewing angle. In addition, it is not necessary to install the projector at an angle to the lens array, which results in a space-saving system. With the proposed method, a viewing angle of ±60 deg can be achieved.
在传统的投影型积分摄影框架中，为了获得较大的视角，需要将多个投影仪以特定角度布置在透镜阵列前。因此，这些系统需要较大的空间。本文提出了一种通过使用相对设置的曲面镜来以节省空间的方式实现大视角的系统。为此，将投影仪直接放置在透镜阵列的后方，并安装曲面镜以包围来自投影仪的光线。光线在镜子之间多次反射后，射向透镜阵列的入射角增大，从而增大了视角。此外，无需将投影仪以一定角度安装在透镜阵列前，这使得系统节省空间。采用所提出的方法，可实现±60°的视角。
