Putting water into the lens' chamber turns the normally flatlens a convex hemisphere.
将水注入镜头的腔中时，会把平时平面的镜片变成凸出的半球。
2
Initially both detector and lens are flat. Beneath both the membranes of the detector and the simple lens are Chambers filled with water.
最初检测器和透镜都是平的，在检测器薄膜和透镜单片下是装满水的舱室。
3
(Injecting water back returns the detector to a flat surface.) Injecting water into the chamber of the lens makes the thin membrane become a convex hemisphere.