CaF2 bullet-lens for 3-5 um IR immersion LED's and photodiode
Application: environmental monitoring
Specification:
Material
CaF2
Type
bi-convex lens
Diameter, mm
11 (+0/-0.1)
Central thickness, mm
5.3 (+/-0.2)
EFL @4.25um, mm
12.5
Surface quality, scr/dig
80/50
Surface figure, fringes
N<=2, delta N<=1 @633nm