E-49-346 18mm x 80mm FL, VIS-NIR Coated, Achromatic Lens
E-49346 18mm x 80mm FL, VIS-NIR Coated, Achromatic Lens
Diameter (mm): 18.00 +0.0/-0.025
Effective Focal Length EFL (mm): 80.00
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 76.52
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 17.00
Centering (arcmin): <1
Center Thickness CT 1 (mm): 5.00
Center Thickness CT 2 (mm): 2.50
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 49.67
Radius R2 (mm): -34.73
Radius R3 (mm): -100.11
Edge Thickness ET (mm): 6.27
Surface Quality: 40-20
Numerical Aperture NA: 0.11
Coating: VIS-NIR (400-1000nm)
Coating Specification:
Rabs ≤0.25% @ 880nm
Ravg ≤1.25% @ 400 - 870nm
Ravg ≤1.25% @ 890 - 1000nm
Ravg ≤1.25% @ 400 - 870nm
Ravg ≤1.25% @ 890 - 1000nm
Power (P-V) @ 632.8nm: 1.5λ
Irregularity (P-V) @ 632.8nm: λ/4
Bevel: Protective bevel as needed
Type: Achromatic Lens
Wavelength Range (nm): 400 - 1000