A smart image sensor for an augmented reality (AR) system using optical devices is presented, which can provide an enhance view of the real world with meaningful information from a computer world. Our designed 128 x 128 image sensor achieves high-sensitivity ID beacon detection of less than -10.0 dB in wide range of 40 dB background intensity. Moreover it can obtain 20-byte ID information per frame using 40 kHz carrier in 30 fps. It enables to get a scene image, locations, IDs and additional information of multiple target objects simultaneously in real time. The advanced performance provides the next step for a practical AR system.
