由本院精密计量室初试成功的单周期层状位相光栅，为精密测试提供了一种新元件。

This single period layered phase grating, which has been tried out successfully for the first time by our institute, provides a kind of new element for the precision measurements.

youdao

由本院精密计量室初试成功的单周期层状位相光栅，为精密测试提供了一种新元件。

This single period layered phase grating, which has been tried out successfully for the first time by our institute, provides a kind of new element for the precision measurements.

youdao