Hi all,
In front of our Cassegrain telescope there is a protecting flat glass.
After celebrating its 40 years birthday we are thinking about re-coating it.
It has a size of 50 cm in diameter and 1 cm in thickness, and we need broadband anti-reflection coating on its both sides.
Does anybody have good experiences with some companies?
Thanks in advance!
best regard, Peiyuan Wang from SLR Graz