E-49-270 3mm Dia. x 4.5mm FL, VIS 0° Coated, Achromatic Lens
E-49-270 3mm Dia. x 4.5mm FL, VIS 0° Coated, Achromatic Lens
Diameter (mm): 3.00 +0.0/-0.025
Effective Focal Length EFL (mm): 4.50
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 2.99
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 2.7
Centering (arcmin): 30-45
Center Thickness CT 1 (mm): 2.00
Center Thickness CT 2 (mm): 1.00
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 3.16
Radius R2 (mm): -2.23
Radius R3 (mm): -7.88
Edge Thickness ET (mm): 2.48
Surface Quality: 20-10
f/#: 1.5
Numerical Aperture NA: 0.33
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