基于光电转换基本原理，设计并研制了用于转镜式高速扫描相机扫描速度的检测装置，包括均匀脉冲光源、精密双狭缝、超快响应光电转换器以及高带宽、高采样率数字示波器等。论述了检测装置的核心部件，用该装置实测了SJZ－15型转镜扫描相机名义扫速为4．5mm／μs的扫描速度，计算出了扫速不均匀性。按照国军标GJB3756，对检测装置的测量不确定度来源进行了分析，给出了该装置的不确定度评定方法及测量不确定度，对检测结果的评定表明，该检测装置的相对测量不确定度不大于0．1%，远低于目前转镜扫描相机的最大扫速不均匀性水平。实验证明，设计的检测装置具有很高的准确度和可靠性。

Based on photoelectric transformation principle, a test device is designed and developed for writing rate of ultrahigh speed rotating mirror streak camera, including pulse light, precise slits, ultra-fast response photomultiplier tube and digital oscilloscope. The substantial components are described in details. The writing rate of 4.5 mm/μs of model SJZ-15 camera is tested with this device, and non-linearity of writing rate is given. The uncertainty factors are analyzed and their uncertainty and evaluation method are given. The relative uncertainty of test device can reach 0.1% according to GJB 3756 and is far less than non-linearity level of rotating mirror streak camera in existence. The examining experiment indicates that the test device has high precision and reliability. This measurement technique has a significant effect on high precision detonation experiment.