扫描线校正器校正量的实验室测试方法

摘要

Scan line corrector (SLC) is an important part of the camera that collects the data in a whisk broom way. SLC runs, in a specific rule, so synchronized with the scanning mirror that the leakage area and overlap area between the adjacent scanning stripes can disappear and be minimized respectively. The traditional way to test the correction by an exterior imaging experiment has disadvantages of high cost, long period and the high environment requirements. A method to test the SLC’s correction in laboratory based on target is re-searched and found in this paper. The D-value of the SLC Forward and Opposite Correction are used as an in-termediate quantity. The SLC’s starting point of the linear segment can be calculated by designing proper match function. Then we can get the SLC’s correction. The validity of the method was verified by the exterior imaging experimentation.%扫描线校正器（Scan Line Corrector, SLC）是摆扫式成像相机中的重要组成部分，SLC以一定规律转动，使相邻的正、反扫描条带间实现不漏扫和小重叠。为了测试SLC的校正量是否准确，传统的方法是通过外景成像试验实测，但这种方法成本高、周期长，对环境要求也较高。针对此问题，文章研究了在实验室下基于靶标的SLC校正量测试方法。该方法以正、反扫校正量差为中间量，通过建立合适的匹配函数计算出 SLC 校正量曲线的线性起始点，得到 SLC在不同扫描视场的校正量，并通过外景试验验证该方法的正确性。