2mm Dia. x 4.0mm FL, MgF2 Coated, Achromatic Doublet Lens
2mm Dia. x 4.0mm FL, MgF2 Coated, Achromatic Doublet Lens
- Designed for 0° Angle of Incidence
- Less Than 1.75% Reflectance Per Surface @ 400 - 700nm
Diameter (mm): 2.00 +0.0/-0.025
Effective Focal Length EFL (mm): 4.00
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 2.92
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 1.6
Centering (arcmin): 30-45
Center Thickness CT 1 (mm): 1.00
Center Thickness CT 2 (mm): 1.00
Center Thickness Tolerance (mm): ±0.1
Radius R1 (mm): 2.26
Radius R2 (mm): -2.26
Radius R3 (mm): -10.00
Edge Thickness ET (mm): 1.72
Surface Quality: 20-10
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