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目前基于TDI方式的电子像移补偿方法中曝光期间电荷包以行为步长进行转移,使电荷包移动和像移之间存在较大的非同步效应,降低了补偿效果。为了提高像移补偿效果,首先分析了目前基于TDI方式的电子像移补偿方法中电荷包移动的离散性对补偿效果的影响,提出了一种改进的电子像移补偿方法,从而可以大大减小电荷包和像移之间存在的非同步效应,对比两种方法调制度,从理论上证明了其对补偿效果的提高作用。给出了改进式的电子式像移补偿方法的驱动时序图,通过室内模拟不同像移补偿实验进行了两种方法的验证,分别比较采用两种像移补偿方法图像的清晰度。结果表明,改进式电子像移补偿法图像调制度平均值47/96大于传统像移补偿法图像调制度平均值1/3,改进式像移补偿法图像清晰度平均值为0.550 2大于传统像移补偿法图像清晰度平均值0.475 3。可以看出,改进式的像移补偿方法相对于传统TDI像移补偿方法,效果明显改善。
At present, the charge transfer method based on the TDI method is used to transfer the charge packets in the step of the exposure during exposure, so that there is a large non-synchronous effect between the charge packet transfer and the image shift, which reduces the compensation effect. In order to improve the image shift compensation effect, firstly the influence of the dispersion of the charge packet movement on the compensation effect in the current electronic image shift compensation method based on the TDI method is analyzed, and an improved electronic image shift compensation method is proposed, which can greatly reduce The non-synchronous effect between the charge-packet and the image shift contrasts the modulation degree of the two methods, and proves that it can improve the compensation effect theoretically. The driving timing diagram of the improved electronic image shift compensation method is given. The two methods are validated by indoor simulation of different image shift compensation experiments, and the sharpness of the two image shift compensation methods is compared respectively. The results show that the average value of modified image shift compensation is 47/96, which is 1/3 the average value of traditional image shift compensation, the average value of modified image shift compensation is 0.550 2, which is larger than the traditional image Compensation compensation method Image clarity average 0.475 3. It can be seen that the improved image shift compensation method is obviously improved compared with the traditional TDI image shift compensation method.