E-32-309 12.5mm Dia. x 20mm FL, MgF2 Coated, Achromatic Doublet Lens
E-32309 12.5mm Dia. x 20mm FL, MgF2 Coated, Achromatic Doublet Lens
Diameter (mm): 12.50 +0.0/-0.025
Effective Focal Length EFL (mm): 20.00
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 16.45
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 11.50
Centering (arcmin): <1
Center Thickness CT 1 (mm): 5.25
Center Thickness CT 2 (mm): 1.10
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 13.98
Radius R2 (mm): -9.35
Radius R3 (mm): -76.14
Edge Thickness ET (mm): 4.62
Surface Quality: 40-20
f/#: 1.6
Numerical Aperture NA: 0.31
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