Oversample-superposition technique applied to long-wave infrared push-broom imaging system

In the long-wave infrared push-broom imaging system, compared with the residence-time of the system, the integration-time of the detector is only about 10% of the former because of strong background in our designing. To make full use of residence-time in push-broom imaging system and increase the SNR, the oversample-superposition method was applied in the designing. We described the method of oversample-superposition according to easy-saturated infrared detector, then analysed it's effection on system PTF and SNR. Furthermore, a successful design of oversample-superposition hardware and image capture software have been made. Some experiments were carried out to capture images of hand which indicate that this system performs well.