The KPA19 Precision Polished Aspheric Lens is an uncoated plano-convex aspheric lens, made with L-BAL35 optical glass, with 25.0 mm diameter and 18.75 mm effective focal length. Aspheric lenses are typically used to reduce the number of lens elements in an optical system, thus reducing the size and weight of assemblies. Aspheric profiles are more difficult to manufacture, but these lenses have increased NA (numerical apeture) and can reduce spherical and other aberrations when compared to a simple lens. These precision aspheric lenses are computer optimized for optimal performance with minimum aberrations. Exact performance parameters can be calculated by feeding the lens parameters in any standard optical design software.
Технические характеристики
- Lens Shape Plano-Convex Aspheric
- Diameter 25.0 mm
- Antireflection Coating Uncoated
- Lens Material L-BAL 35 (589/611)
- Surface Quality 60-40 scratch-dig
- Surface Accuracy 0.75 m RMS
- Effective Focal Length (EFL) 18.8 mm
- Back Focal Length (BFL) 12.46 mm
- Center Thickness (Tc) 10.00 mm
- F/# 0.8
- Radius of Curvature (R) 11.05 mm
- Design Wavelength 587.6 nm
- Shape S2 Plano
- Diameter Tolerance +0.0/-0.1 mm
- Center Thickness Tolerance ±0.1 mm
- Clear Aperture 90% of central diameter
- Substrate Centering of Ruled Area 3-5 arc min
