The PAC076 Visible Achromatic Triplet Lens is a 400 to 700 nm antireflection coated, 1.5 inch (38.1 mm) diameter, N-BaSF2, N-SF4, and N-BaSF2 precision achromatic triplet lens with an effective focal length of 125 mm. Our Steinheil achromatic triplets are optimized for finite conjugate 1:1 imaging. Formed using two identical negative meniscus lenses cemented to a biconvex lens. These lenses are diffraction limited at 488, 514.5, and 632.8 nm. This achromat is computer designed to effectively minimize spherical aberration and coma when operating at infinite conjugate ratio, yielding smaller focused spot sizes. Unlike singlet lenses, this results in a constant focal length independent of aperture and far better off-axis performance. Achromats are superior to singlet lenses for monochromatic applications at any visible wavelength.
Технические характеристики
- Lens Type Achromatic Triplet
- Lens Shape Plano-Convex
- Diameter 38.1 mm
- Antireflection Coating 400-700 nm
- Coating Type Visible Single-Layer MgF2
- Damage Threshold 1.0 J/cm2 @ 1064 nm, 10 ns , 10 Hz
- Transmission T>95%
- Lens Material N-BaSF2/N-SF3/N-BaSF2
- Surface Quality 40-20 scratch-dig
- Surface Accuracy, Irregularity λ/4
- Surface Accuracy, Power 1.5 &lambda,
- Effective Focal Length (EFL) 125 mm
- Back Focal Length (BFL) 117.5 mm
- F/# 3.3
- Radius of Curvature (R) 118.645 mm
- Radius 2 -59.744 mm
- Radius 3 59.744 mm
- Radius 4 -118.645 mm
- Edge Thickness (Te) 18.5 mm
- Center Thickness (Tc) 21.6 mm
- Thickness, Center 2 3.6 mm
- Design Wavelengths 589 nm
- Centration &le,3 arc min
- Diameter Tolerance +0/-0.1 mm
- Focal Length Tolerance ±2.0%
- Center Thickness Tolerance ±0.3 mm
- Clear Aperture 90% of central diameter
- Cleaning See How to Clean Optics
