E-22998 20mm Dia., 0.67 Numerical Aperture, 350-700nm Coated, Precision Aspheric Lens
Product VIS-EXT+ Coating Curve
Diameter (mm): 20.00 +0.00/-0.025
Effective Focal Length EFL (mm): 15.00 @ 587.6nm
Numerical Aperture NA: 0.67
Back Focal Length BFL (mm): 8.12
Coating: VIS-EXT+ (350-700nm)
Coating Specification:
Ravg <0.5% @ 350 - 700nm @ ±30° AOI
Rabs <1.5% @ 350 - 700nm @ ±30° AOI
Rabs <1.5% @ 350 - 700nm @ ±30° AOI
Centering (arcmin): <3
Surface Quality: 40-20
Clear Aperture CA (mm): 18.00
Edge Thickness ET (mm): 7.97
Center Thickness CT (mm): 12.42 ±0.10
f/#: 0.75
Bevel: Protective bevel as needed
Shape of Back Surface: Plano
Wavelength Range (nm): 350 - 700
Conjugate Distance: Infinite
Asphere Figure Error, RMS @ 632.8nm: 0.4λ