Li Jun-Lin, Yang Yong-Qiang, Lan Tai-Ji, Tang Yan-Fu, Li Hong-Yu, Li Zhong-Ming
Appl Opt. 2021 May 10;60(14):4191-4196. doi: 10.1364/AO.419457.
By analyzing the process of time delay integration dynamic imaging, we establish a model of velocity mismatch. Based on this model, we analyze the influence of different factors on the dynamic imaging process, and a modulation transfer function (MTF) is used to evaluate imaging quality. According to the simulation, the velocity mismatch and scan stage are the main factors for image quality. The MTF of the image sensor decreases with the velocity mismatch, and the scan stage increases. In addition, an image with higher contrast can be obtained in a short integration time. However, a shorter integration time leads to insufficient sampling. Furthermore, we establish a dynamic MTF testing system, and evaluate the experiment at different imaging modes. Through data comparison, the experimental data are consistent with theoretical data.
通过分析延时积分动态成像过程，我们建立了速度失配模型。基于该模型，我们分析了不同因素对动态成像过程的影响，并使用调制传递函数（MTF）来评估成像质量。根据模拟结果，速度失配和扫描阶段是影响图像质量的主要因素。图像传感器的MTF随着速度失配的增加而降低，随着扫描阶段的增加而增加。此外，在短积分时间内可以获得对比度更高的图像。然而，较短的积分时间会导致采样不足。此外，我们建立了动态MTF测试系统，并在不同成像模式下进行实验评估。通过数据比较，实验数据与理论数据一致。
