三线阵测绘相机热光学试验交会角测试系统

Measuring system of space intersection angle for three-line mapping camera in thermal-optical test

对三线阵测绘相机热光学试验交会角测试机理进行了研究,设计了试验测试系统,提出了一种空间交会角定量测量方法。针对测绘相机热光学试验阐述了对热真空试验设备和光学测量场等测试系统的要求,特别是平行光管的改造和特种分划板的要求。同时,描述了进行三线阵测绘相机热光学试验前的准备工作。利用LabVIEW软件编制数据采集系统,采用定量测量法对三线阵测绘相机交会角进行了测量。结果显示,测试相机在工况转变后交会角的变化在1″以内,表明该测量方法可以准确得到相机交会角的变化量,测量数据对三线阵立体测绘相机在轨测量及地面影像分析提供了可靠的依据。

A quantitative measurement method for the space intersection angle of a three-line mapping camera is put forward in a thermal-optical environment test after studying the measuring principle of the intersection angles and designing a new measuring system. The requirements of the thermovacuum measuring system and optical measurement fields are presented in detail, especially the demands for the collimator and special reticle are described. Then, the preparation for the thermal-optical test is issued. A measurement software system is established based on LabVIEW and the intersection angle of the three-line mapping camera is tested by the quantitative measuring method. The results show that the change of the intersection angle is less than 1＂ when the temperature operating condition has been changed. It is concluded that the quantitative measurement method can get the accurate change of the intersection angle, and measurement data can provide important references for the ground analysis with three-line mapping cameras.