此激光平行光管具有以前平行光管的优点，且可以与数字相移干涉仪对接，直接进行波前误差的高精度测量。
The laser collimator not only has the advantages of existing ones, but also can be used to measure wavefront error with high accuracy interferometer.
本文所介绍的平行度检测仪可以取代大口径平面镜，0.2秒平行光管、大口径平行光管、拱形检测架、T型检测架等大型检测仪器的某些使用功能。
Their functions can substitute for some uses of large diameter plane mirror, 0.2"light pipe, major diameter light pipe, arch type detector, T type detector and so on."
本文所介绍的平行度检测仪可以取代大口径平面镜，0.2秒平行光管、大口径平行光管、拱形检测架、T型检测架等大型检测仪器的某些使用功能。
Their functions can substitute for some uses of large diameter plane mirror, 0.2"light pipe, major diameter light pipe, arch type detector, T type detector and so on."
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