多次采样技术在红外推扫系统中的分析与应用

Analysis and Application of Multiple Sampling Technology in Infrared Push-broom System

介绍了影响红外推扫系统噪声等效温差(NETD)的参数,证明了多次采样技术可以显著降低系统NETD,提出了在驻留时间一定的情况下选择积分时间和采样次数的原则。通过短波红外相机实验表明多次采样技术可以显著提高图像质量。

In infrared, particularly long-wave infrared remote sensing system, the NETD is one of the most important performance parameters. In the infrared push-broom systems of satellites, the multiple sampling technology is widely used to improve the performance of systems. This article introduces the parameters that influence the NETD of infrared push-broom systems, proves that the multiple sampling technology can remarkably reduce the NETD, and gives a principle of choosing integrating time and sampling times when the resident time of system is fixed. By experiments of a short-wave infrared camera, it is proved that the multiple sampling technology can remarkably improve the image quality.