散光片，也叫复曲面软镜，是专门矫正较高度数散光的镜片。
顶焦度计又称对光机、查片机，可用来测量球光镜镜度、散光镜镜度、棱镜镜度以及散光轴线和光学中心点等，是眼镜片冷加工中必不可少的检测仪器。
The lensometers is also called measural lens dioptre instrument, to measure spherical lens dioptre, cylindric lens dioptre and axis, prism dioptre, and lens optical center etc.
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.
最后，介绍了使用窄带滤光片测量星载超光谱成像仪杂散光的测量系统组成、测量步骤和测量结果。
Finally, the system components, measurement procedure and measurement results of the stray light measurement system, using narrow-band filter, are introduced.
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