系统中两块编码光栅用透镜互相成倒像，被测物置于其间并且也用透镜成像于观察屏上。
In the system two coded gratings are inversely imaged to each other by a lens, and the tested phase object is placed between and imaged onto an observation screen.
系统中两块编码光栅用透镜互相成倒像，被测物置于其间并且也用透镜成像于观察屏上。
In the system two coded gratings are inversely imaged to each other by a lens, and the tested phase object is placed between and imaged onto an observation screen.
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