长波红外(8?12.5 m)焦平面的性能在很多方面弱于中短波红外器件，其非均匀性及盲元状况较严重。本课题首次在国内引进了法国Sofradir公司的320×256像元HgCdTe长波红外焦平面探测器MARS VLW RM4，其波长响应范围为7.7 ?12 m。基于一套高帧频低噪声信息获取系统，经过动态范围标定，实现了一套动态范围为250?330 K、噪声等效温差(Noise Equivalent Temperature Difference, NETD)小于50 mK的热红外成像系统。针对焦平面各像元的响应特性，研究了适用于热红外成像系统的非均匀性及盲元校正方法，提出了基于辐射定标的非均匀性校正和盲元检测。经实验验证，其校正效果优于两点定标法，且易于工程实现，基于辐射定标的结果可实现精确的温度反演。

A long wave infrared (8-12.5 m) focal plane array can not operate better than medium and short wave ones in many respects. Its non-uniformity and blind-pixel problems are quite serious. A MARS VLW RM4 320×256 HgCdTe long wave infrared focal plane array detector with a wavelength response range from 7.7 m to 12 m is imported from Sofradir Company in France. On the basis of a high frame frequency and low-noise information acquisition system of which the dynamic range is calibrated, a thermal infrared imaging system is developed. Its dynamic range is from 250 K to 330 K and Noise Equivalent Temperature Difference (NETD) is less than 50 mK. According to the response characteristics of the pixels in the array detector, the non-uniformity and blind-pixel correction method suitable for thermal infrared imaging systems are studied. A non-uniformity and blind-pixel detection method based on radiation calibration is put forward. The experimental result shows thatthe method is better than the two-point method. It is easy to be implemented in engineering. The result based on radiation calibration is useful for more precise temperature inversion.