Design Wavelength  9500 nm  Magnification  Infinite 
Numerical Aperture  0.85  Window Thickness  
Clear Aperture  4.00 mm  Laser Window Material / Index  
Effective Focal Length  1.873 mm  Glass  BD2 
Working Distance  0.72 mm  Surface Quality  8050 ScratchDig(Entire Bulk Material) 
390037D  
C037TMED 
V_{d} number   

CTE (10^{6} / °C)  13.5 
Thermo optic coefficient (10^{6} / °C) (Δn/ΔT)  91 



z  SAG as a Function of Y  A_{4}  4^{th} Order Aspheric Coefficient 
R  Radius of Curvature  A_{6}  6^{th} Order Aspheric Coefficient 
k  Conic Constant  A_{8}  8^{th} Order Aspheric Coefficient 
A_{2}  2^{nd} Order Aspheric Coefficient  A_{n}  n^{th} Order Aspheric Coefficient 