分孔径探测系统通道间视场一致性度量方法

通道间视场一致性程度是分孔径探测系统的重要指标之一，准确判断视场一致性程度对于该类仪器的设计和装调有积极意义。介绍了视场测量原理和视场一致性度量原理；基于矩阵扫描测量视场的方法，提出了体积法和面积法两种度量分孔径视场一致性的方法；简要分析了不同情况下选用各种度量方法的优劣；并在实验室搭建了分孔径探测系统视场测量装置，测量了大气偏振辐射计通道间视场一致性程度。结果表明:即使装调光轴平行度高于95%，体积和面积一致性仍可能低于90%。单一方式难以准确度量视场一致性情况，多种方法混合使用可以更全面地了解仪器零件加工和装调情况。

Measurement method for FOV conformity between channels ofaperture-divided detection system

Field of view (FOV) conformity between different channels is an important evaluating indicator of aperture-divided detection system. Accurate estimation of FOV conformity will make positive sense to design and fabrication of aperture-divided detection system. This paper firstly presents the principles of FOV measuring and FOV measuring conformity. Based on matrix scanning measurement, volume and area methods for measuring conformity of FOV between different channels are proposed. Then advantages and disadvantages of three measurement methods in different scenarios were briefly analyzed.Devices for measuring FOV of aperture-divided detection system are set up and degree of FOV conformity of aperture-divided radiometer are measured. Results indicate that: even if parallelism of optical axes among different channels is better than 95%, conformities of volume and area is still possibly less than 90%. Combination of using three methods can have a better understanding of manufacture and assembly of aperture-divided detection system.