A 3D vision 2.1Mpixel image sensor for single-lens camera systems

Abstract

We present a CMOS image sensor that enables a compact 3-dimensional (3D) vision camera system comprising a single set of the sensor and a camera lens. In order to make binocular parallax, which is essential for 3D imaging, the input pupil of the camera lens is presumed to consist of the right-eye and the left-eye domains, where the pixels exclusively receiving light beams from the right-eye domain and those from the left-eye domain, are arranged alternately. In addition, the sensor features an on-chip lenticular lens to split the incident light from the two directions and a Digital Micro Lens [1,2] to focus the split light beams onto the dedicated pixels without significant crosstalk. The fabricated 3D image sensor enables not only successful stereovision imaging in color with sufficiently high sensitivity, but also accurate calculation of distance.