250-600 nm, 450-700 nm, 480-20000 nm, 650-20000 nm

Round

25.4 mm, 50.8 mm, 76.2 mm, 101.6 mm, 152.4 mm, 203.2 mm

6.0 mm, 12.7 mm, 14.7 mm, 17.7 mm, 23.5 mm, 29.5 mm

Zerodur

0-45°

≥central 80% of diameter

See How to Clean Optics