E-49-952 12.5mm Dia. x 17.5mm FL, VIS-NIR Coated, Achromatic Lens
E-49952 12.5mm Dia. x 17.5mm FL, VIS-NIR Coated, Achromatic Lens
Diameter (mm): 12.50 +0.0/-0.025
Effective Focal Length EFL (mm): 17.50
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 13.59
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 11.50
Centering (arcmin): <1
Center Thickness CT 1 (mm): 5.80
Center Thickness CT 2 (mm): 1.50
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 12.20
Radius R2 (mm): -9.82
Radius R3 (mm): -39.19
Edge Thickness ET (mm): 5.08
Surface Quality: 40-20
f/#: 1.4
Numerical Aperture NA: 0.36
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