这种胶卷容许调焦误差。
本文用几何光学描述了离轴探测调焦误差信号与系统参数的关系，并与实验结果进行了比较。
Characteristics of the defocusing error signals are expressed in the terms of an off-axial detection system by geometric optics. The results are compared with experiment.
分析了大地测量仪器望远镜调焦运行误差产生的原因，并以经纬仪为例，介绍一套利用JSJ综合检验仪对其调焦误差进行检定的方法。
Meanwhile, the method that tests the focus running error by using JSJ integrating inspection instrument through an example of theodolite is introduced.
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