E-45-217 30mm Dia. x 125mm FL, MgF2 Coated, Achromatic Doublet Lens
E-45-217 30mm Dia. x 125mm FL, MgF2 Coated, Achromatic Doublet Lens
Diameter (mm): 30.00 +0.0/-0.025
Effective Focal Length EFL (mm): 125.00
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 121.37
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 29.00
Centering (arcmin): <1
Center Thickness CT 1 (mm): 4.92
Center Thickness CT 2 (mm): 2.50
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 81.53
Radius R2 (mm): -56.59
Radius R3 (mm): -220.08
Edge Thickness ET (mm): 5.52
Surface Quality: 40-20
f/#: 4.17
Numerical Aperture NA: 0.12
Coating: MgF2 (400-700nm)
Coating Specification: Ravg ≤1.75% @ 400 - 700nm
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 - 700