Podeo won a contract, to manufacture special and big elliptic BK7 optic.
We had to meet a flatness = lambda/4 on 1 side.
Dimensions are around 190,0mm x 120,0mm x 20,0mm thick.
These optics are supplied with a RMax coating for 1550nm, and a minimal difference between “p” pol and “s” pol.
This kind of optic is used for a measurement application, through a lidar system.