DMD红外场景产生器非均匀性校正方法研究

非均匀性是影响数字微镜器件（Digital Micro-mirror Device，DMD）红外场景产生器投射红外场景质量的主要因素之一，DMD红外场景产生器必须经过非均匀性校正才能满足复杂环境下红外成像设备内场仿真试验的应用要求。给出了DMD红外场景产生器的非均匀性校正流程；提出了一种更适合于现有测试条件的变尺度稀疏网格非均匀性测量方法；采用线性化和分段校正进行离线数据处理；采用“在线查表法”进行实时非均匀性校正。仿真结果表明:经过变尺度稀疏网格测试法及非均匀性实时校正算法，可将非均匀性降低至0.5%左右，显著提高了DMD红外场景产生器的红外场景仿真质量。

Nonuniformity Correction of Infrared Scene Simulator Based on DMD

The nonuniformity of an infrared scene simulator based on a digital micro-mirror device(DMD)is one of the major factors affecting its performance,and it must be corrected to satisfy the application requirements of the simulation testing of infrared imaging equipment in complex environments.The nonuniformity correction flow of an infrared scene simulator based on a DMD was investigated in detail.A method for measuring the nonuniformity of a variable scale sparse grid was used to fit the test conditions better.Offline data processing based on linearization and segmentation correction was introduced,and real-time nonuniformity correction based on online table lookup was adopted.The simulation shows that the nonuniformity can be reduced to approximately 0.5%by the variable scale sparse grid measurement and real-time nonuniformity correction.The infrared scene quality of the infrared scene simulator based on a DMD improved significantly.