3D-real-time CCD imager based on Background-level Subtraction Scheme

Abstract

We developed a new pixel structure for a 3D real-time charge-coupled device imager. A background-level subtraction scheme and a charge integration cell enable us to measure 3D data under strong background light. In each pixel, the background level is extracted from the floating diffusion structure to extract the photoelectrons generated by the signal light without using complicated circuits. In addition, the integration cell reduces the photon shot noise generated by the background light. With these novel pixels, 3D real-time data can be detected even under sunlight of up to 100 k lx. .