Figure 3
Arrangement used to align two crossed lenses, separated by 80 mm. The Ge wafers with the etched lenses are visible. To be able to obtain a stigmatic image, the two lenses were fabricated with 80 mm difference in their focal lengths. Each wafer is mounted on top of several piezo-stages for the alignment. The entire system is carried by one of the stages on the optics test bench at B16 of Diamond. |