There is an XY stage, and then there is a focusing stage, which is a flexure mechanism that's built in paper itself that allows us to move and focus the lenses by micron steps.
这有个纵横移动载物台， 还有个聚焦装置， 这是一种具有伸缩性的装置， 直接用纸制造， 这样我们就可以 通过微米级的移动来聚焦。