E-45-216 25mm Dia. x 400mm FL, MgF2 Coated, Achromatic Doublet Lens
E-45216 25mm Dia. x 400mm FL, MgF2 Coated, Achromatic Doublet Lens
Diameter (mm): 25.00 +0.0/-0.025
Effective Focal Length EFL (mm): 400.00
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 397.84
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 24.00
Centering (arcmin): <1
Center Thickness CT 1 (mm): 3.00
Center Thickness CT 2 (mm): 2.50
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 244.65
Radius R2 (mm): -179.62
Radius R3 (mm): -534.10
Edge Thickness ET (mm): 5.03
Surface Quality: 40-20
f/#: 16.00
Numerical Aperture NA: 0.03
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