基于DMD的红外景象投射器灰度调制与同步技术  

Gray scale modulation and synchronization of infrared scene projector based on DMD

作　　者：许家林[1] 李丙玉[1] 刘阳[1] 隋龙[1] 王晓东[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《红外与激光工程》2014年第4期1062-1067,共6页Infrared and Laser Engineering

摘　　要：基于数字微镜(DMD)的红外场景投射器可以被应用于场景仿真系统中。论述了应用于红外仿真系统的DMD显示灰度图像的原理和对应的DMD的工作时序,并且设计了基于TI的0.7XGA芯片组的红外场景投射器。该设计支持外部同步触发,投射图像是灰度级是8位,并且投射图像的帧频大于250 Hz。仿真系统中的热像仪和投射器的同步将影响采集的结果,分析了热像仪的积分时间包含、超前和滞后于投射器播放时间对系统采集到的图案灰度产生影响,论证了严格同步在红外仿真系统中的必要性,并通过实验数据进一步证明了分析的结果。The Dynamic Infrared Scene Projector based on Digital Micromirror Device （DMD） can be used in Scene Simulation System. The principle of displaying grayscale images on DMD which used in Scene Simulation System and its driving timing were discussed in this paper. An infrared scene projector based on 0.7XGA DMD chipset of Texas Instruments was designed. This projector can be synchronized by external trigger signal, and its max frame rate is greater than 250 Hz while the image mode is 8 bits of grayscale resolution. The synchronization between the projector and the image sampling equipment （Infrared Thermal Imager） has great influence on the sampled result. 3 kinds of synchronization relationship, including the projecting phase leading, equal to and lagging the image sampling system, were analyzed to illustrate the influence of the synchronization relationship between the projector and the image sampling equipment. Experiments show the results in detail.

关 键 词：场景投射器 灰度图像显示 同步 

分 类 号：TN215[电子电信—物理电子学]