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T-LF5847-E - Ø1/2" CaF2 Negative Meniscus Lens, f = -50.0 mm, AR-Coated: 2 - 5 µm

Fosco Connect Part No.: T-LF5847-E

  • $ 525.00 or



T-LF5847-E - Ø1/2" CaF2 Negative Meniscus Lens, f = -50.0 mm, AR-Coated: 2 - 5 µm

Product Drawing

  • Vacuum-Grade Calcium Fluoride Substrate
  • Ø1/2" and Ø1" Versions Available
  • Broadband AR Coating for the 2 - 5 μm Range
  • Focal Lengths from -20.0 mm to -1000.0 mm
  • Diameter 1/2" (12.7 mm) 
  • Focal Length -50.0 mm
  • Diopter -20.0
  • Radius of Curvature 1 20.4 mm
  • Radius of Curvature 2 9.8 mm
  • Center Thickness 3.0 mm
  • Edge Thickness 4.3 mm
  • Back Focal Length -47.9 mm
  • AR Coating <1.25% Ravg from 2 - 5 μm
  • Reference Drawing Click to see
AR Coating Range 2 - 5 μm
Reflectance over
AR Coating Range @ 0° AOI
Ravg < 1.25%
Diameters Available 1/2" or 1"
Diameter Tolerance +0.00/-0.10 mm
Thickness Tolerance ±0.1 mm
Focal Length Tolerance ±2%
Surface Quality 40-20 (Scratch-Dig)
Spherical Surface Power 3λ/2
Spherical Surface Irregularity
(Peak to Valley)
λ/2
Centration <3 arcmin
Clear Aperture >90% of Diameter
Design Wavelength 4 μm
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