E-49-760 12.7mm Dia. x 25.4mm FL, MgF2 Coated, Achromatic Doublet Lens
E-49760 12.7mm Dia. x 25.4mm FL, MgF2 Coated, Achromatic Doublet Lens
Diameter (mm): 12.70 +0.0/-0.025
Effective Focal Length EFL (mm): 25.40
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 22.45
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 11.70
Centering (arcmin): <1
Center Thickness CT 1 (mm): 4.00
Center Thickness CT 2 (mm): 1.75
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 16.77
Radius R2 (mm): -13.63
Radius R3 (mm): -50.73
Edge Thickness ET (mm): 4.10
Surface Quality: 40-20
f/#: 2.00
Numerical Aperture NA: 0.25
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