抄録
To reduce the random telegraph signal (RTS) noise and dark current in extremely low-light conditions as well as to increase the number of incident photons, the multi-aperture imaging system with a selective averaging method has been proposed. In this work, an ultra-high-sensitivity multi-aperture color camera with 2×2 apertures is being developed. In the prototype camera, low-noise color sensors with 1280×1024 effective pixels fabricated in 0.18um CIS technology are utilized. The pixel pitch is 7.11μm×7.1μm. The noise of the sensor is around le- based on the folding-integration and cyclic column ADCs, and the low voltage differential signaling (LVDS) is used to improve noise immunity. The synthetic F-number of the prototype camera is 0.6. In the simulation, the effective noise at the peak of noise histogram is reduced from 1.44 e- to 0.73 e- in a 2×2-aperture system, where RTS noise and large dark current have been successfully removed.
