Технические характеристики
- Lens Shape Bi-Concave
- Diameter 25.4 mm
- Lens Material UV Fused Silica
- Antireflection Coating Uncoated
- Surface Quality 20-10 scratch-dig
- Surface Flatness &lambda,/2
- Surface Accuracy, Irregularity &lambda,/4
- Surface Accuracy, Power 1.5 &lambda,
- F/# -39.4
- Effective Focal Length (EFL) -1000 mm
- Back Focal Length (BFL) -1000.85 mm
- Radius of Curvature (R) -918.377 mm
- Edge Thickness (Te) 2.64 mm
- Center Thickness (Tc) 2.5 mm
- Principal Plane 1 (P1) 0.85 mm
- Principal Plane 2 (P2) -0.85 mm
- Design Wavelength 589 nm
- Centration &le,3 arc min
- Chamfers 0–0.8 mm face width
- Chamfers Angle/Tolerance 45° ±15°, typical
- Focal Length Tolerance ±1 %
- Diameter Tolerance +0/-0.1 mm
- Center Thickness Tolerance ±0.1 mm
- Clear Aperture &ge,central 90% of diameter
- Cleaning See How to Clean Optics
