航天光学遥感相机多谱带滤光片设计与考核方法

多谱带滤光片是航天光学遥感相机上的关键器件。其兼具多个谱带滤光及探测器封装的功能，特征尺寸多，膜系复杂，其设计及考核过程相比全色或单谱带滤光片要复杂得多。介绍了多谱带滤光片的基片外形尺寸、滤光窗口尺寸、像元位置标识窗口、封装对准标识等关键特征尺寸的设计及计算方法。分析了滤光片的设计加工误差对滤光片与光敏芯片的封装对准精度、探测器在焦平面上的配准拼接以及相机的光谱响应特性等的影响。并基于现有的航天器环境考核方法提出了一套针对多谱带滤光片的环境考核流程和测试方法。最后给出了某相机多谱带滤光片的设计及考核应用实例。

Multi-band filter design and assessment for space optical-remote-sensing camera

Multi-band filter is the key component of the detector of space optical-remote-sensing camera. It was used for multispectral band-pass filtering and the encapsulation of detector. Because of the complicate feature sizes and films, the designing and environment adaptability assessment of multi-band filter were more complicated than the panchromatic or monochromatic filter. Physical dimension of filter substrate, filter window size, on-die pixel-location-symbol window size and on-filter alignment mark were the feature sizes of a multi-band filter, whose designing and calculating method for these feature sizes were given. Influences of designing or manufacturing error of the multi-band filter were also analysed, such as filter-and-die alignment precision, detector butting precision on focal plane assembly, and spectral response characteristic of camera system. An environmental assessment method for multi-band filter was also proposed, and the assessment method was based on the existing environment adaptability assessment standard for spacecraft. Finally an application example of multi-band filter designing and environmental assessment from some space camera was given.