对于大型的空间望远镜，由于发射和在轨工作环境复杂，且常要求在多波段下工作，从而使得在轨自动调焦成为必不可少的一项关键技术。
Because of the complicated launch and on-orbital working condition, and working with multiband, AF technology is a key technology for large space telescopes.
他找到双筒望远镜，然后调焦对准那艘船看。
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.
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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