Ge meniscus lenses for 8-10 um IR imagers
Application: sea-based system of 360 deg.-panoramic view
Specification:
Material
Ge
Type
meniscus lens
Diameter, mm
105 (+0/-0.2)
Central thickness, mm
8 (+/-0.2)
EFL tolerance, %
+/-2
Surface quality, scr/dig
60/40
Surface figure, fringes
N<=5, delta N<=1 @633nm
AR coating (DLC/BBAR type),
R @8-10 um, %<5 (see the curve below)
Fig. 3. Transmission spectra of Germanium meniscus lenses for 8-10 um IR imager.