Bi-Concave (Double-Concave)

N-BK7

650-1000 nm

NIR Multilayer

AR.16

7.5 J/cm², 10 ns pulses, 10 Hz at 1064 nm

40-20 scratch-dig

λ/4

1.5 λ

≤3 arc min

0–0.8 mm face width

45° ±15°, typical

±1 %

+0/-0.1 mm

±0.1 mm

≥central 90% of diameter

See How to Clean Optics