Multi-aperture Telecentric Lens for 3D Reconstruction

Abstract

We present a new telecentric lens which is able to gain 3D information. The proposed lens system has multiple aperture stops which enable to capture multi-directional parallel light rays, while a conventional telecentric lens has only one aperture stop, and can capture only light rays which are perpendicular to the lens. We explain the geometry of the multi-aperture telecentric system and show that correspondences fall on a line like those in a conventional stereo. As it is a single-lens sensor, we also introduce the principles of 3D reconstruction. Unlike a conventional stereo camera, the disparity of a scene point measured by the proposed lens system is linearly proportional to the depth of a scene point.