E-49-274 4mm Dia. x 8mm FL, VIS 0° Coated, Achromatic Lens
E-49274 4mm Dia. x 8mm FL, VIS 0° Coated, Achromatic Lens
Diameter (mm): 4.00 +0.0/-0.025
Effective Focal Length EFL (mm): 8.00
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 6.69
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 3.6
Centering (arcmin): <3
Center Thickness CT 1 (mm): 1.50
Center Thickness CT 2 (mm): 1.03
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 5.76
Radius R2 (mm): -3.49
Radius R3 (mm): -26.05
Edge Thickness ET (mm): 2.09
Surface Quality: 20-10
f/#: 2.00
Numerical Aperture NA: 0.25
Coating: VIS 0° (425-675nm)
Coating Specification: Ravg ≤0.4% @ 425 - 675nm
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): 425 - 675