Линза с плоско-вогнутой формой, кварцовый плавленый материал, 25,4 мм, -75 мм EFL, без покрытия, модель SPC031

Технические характеристики

• Lens Shape Plano-Concave
• Diameter 25.4 mm
• Lens Material UV Fused Silica
• Antireflection Coating Uncoated
• Surface Quality 20-10 scratch-dig
• Surface Flatness λ/2
• Surface Accuracy, Irregularity λ/4
• Surface Accuracy, Power 1.5 λ
• F/# -3
• Effective Focal Length (EFL) -75 mm
• Back Focal Length (BFL) -76.71 mm
• Radius of Curvature (R) -34.425 mm
• Edge Thickness (Te) 4.45 mm

• Center Thickness (Tc) 2.5 mm
• Principal Plane 2 (P2) -1.71 mm
• Design Wavelength 589 nm
• Centration ≤ 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 ≥ central 90% of diameter
• Cleaning See How to Clean Optics