Integration time is important to error of photometrical results in CCD photometric and observation.
CCD测光观测中积分时间的选取，对测光结果的误差大小有很大影响。
The structure and the optical functions of porous anodic films were studied by XRD, SEM and spectro-photometrical means.
采用X射线衍射、扫描电镜(sem)和光谱分析等测试技术，研究了多孔氧化铝介质膜的组成、结构以及光功能特性。
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