E-45-419 75mm Dia. x 400mm FL, MgF2 Coated, Achromatic Doublet Lens
E-45419 75mm Dia. x 400mm FL, MgF2 Coated, Achromatic Doublet Lens
Diameter (mm): 75.00 +0.0/-0.025
Effective Focal Length EFL (mm): 400.00
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 392.10
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 73.50
Centering (arcmin): <1
Center Thickness CT 1 (mm): 11.05
Center Thickness CT 2 (mm): 6.00
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 246.50
Radius R2 (mm): -180.92
Radius R3 (mm): -526.70
Edge Thickness ET (mm): 12.84
Surface Quality: 40-20
f/#: 5.33
Numerical Aperture NA: 0.09
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