E-49-302 5mm Dia. x 20mm FL, VIS-NIR Coated, Achromatic Lens
E-49302 5mm Dia. x 20mm FL, VIS-NIR Coated, Achromatic Lens
Diameter (mm): 5.00 +0.0/-0.025
Effective Focal Length EFL (mm): 20.00
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 18.60
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 4.5
Centering (arcmin): <1
Center Thickness CT 1 (mm): 1.61
Center Thickness CT 2 (mm): 1.03
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 14.11
Radius R2 (mm): -8.63
Radius R3 (mm): -75.59
Edge Thickness ET (mm): 2.38
Surface Quality: 40-20
f/#: 4.00
Numerical Aperture NA: 0.13
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