Технические характеристики
- Lens Shape Plano-Convex
- Diameter 25.4 mm
- Lens Material CaF2
- Antireflection Coating Uncoated
- Surface Quality 40-20 scratch-dig
- Surface Accuracy, Irregularity &lambda,/4 at 633 nm
- F/# 9.84
- Effective Focal Length (EFL) 250 mm
- Radius of Curvature (R) 104.556
- Edge Thickness (Te) 3.23 mm
- Center Thickness (Tc) 4.0 mm
- Design Wavelength 2.94 µm
- Centration &le,3 arc min
- Diameter Tolerance +0/-0.12 mm
- Center Thickness Tolerance ±0.12 mm
- Clear Aperture &ge,central 90% of diameter
