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.
大学物理实验中分光计实验的难点在于调节仪器使望远镜光轴垂直于分光计中心转轴。
The difficulty in spectrometer experiment is adjusting the optical axis of telescope to be vertical to the revolving axis of the spectrometer.
本文以jjy型分光计为例，对分光计的聚焦与光轴倾斜度这两方面的调节做了系统论述。
Taking the JJY model spectrometer as an example, the focusing and inclination of optical axis are discussed in this paper.
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