Stürzl W, Soccol D, Zeil J, Boeddeker N, Srinivasan M V
Department of Neurobiology and Center of Excellence Cognitive Interaction Technology, Bielefeld University, P.O. Box 100131, 33501 Bielefeld, Germany.
Appl Opt. 2008 Nov 10;47(32):6070-8. doi: 10.1364/ao.47.006070.
We present a new combination of lenses and reflective surfaces for obstruction-free wide-angle imaging. The panoramic imaging system consists of a reflective surface machined into solid Perspex, which together with an embedded lens, can be attached to a video camera lens. Unlike vision sensors with a single mirror mounted in front of a camera, the view in the forward direction (i.e., the direction of the optical axis) is not obstructed. Light rays contributing to the central region of the image are refracted at a centrally positioned lens and at the Perspex enclosure. For the outer image region, rays are reflected at a mirror surface of constant angular gain machined into the Perspex and coated with silver. The design produces a field of view of approximately 260 degrees with only a small separation of viewpoints. The shape of the enclosing Perspex is specifically designed in order to minimize internal reflections.
我们展示了一种用于无遮挡广角成像的新型透镜与反射面组合。全景成像系统由加工在实心有机玻璃中的反射面组成，该反射面与一个嵌入式透镜一起，可以连接到摄像机镜头上。与在摄像机前安装单个镜子的视觉传感器不同，向前方向（即光轴方向）的视野不会被遮挡。对图像中心区域有贡献的光线在位于中心位置的透镜和有机玻璃外壳处发生折射。对于图像的外部区域，光线在加工在有机玻璃中并镀银的具有恒定角增益的镜面上反射。该设计产生了大约260度的视野，且视点分离很小。封闭有机玻璃的形状经过专门设计，以尽量减少内部反射。
