根据形状误差的评定模型，研究了形状误差的概率分布类型，并据此对形状误差的测量结果不确定度进行估计。
According to the evaluation models of form error, the probability distribution types of form error are researched, and the uncertainty of measurement result of form error is estimated with them.
通常采用概率方法来评定不确定度，但该类方法不太适用于非精确性测量数据。
The measurement uncertainty is often evaluated by a probabilistic approach, but such evaluation is not always adapted to imprecise measurement data.
窄带滤光片法测量不确定度为0.646%（置信概率约为95%），能满足星载成像光谱仪杂散光测量的工程需要。
The relative uncertainty of the measurement is 0.646% when the fiducial probability is about 95%, which can meet the needs of the stray light measurement.
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