E-84128 2mm Dia. x 4mm FL, VIS-NIR Coated, Achromatic Lens
Product VIS-NIR Coating Curve
Product ISO
Product Drawing
Product Family Description
- Designed for 0° Angle of Incidence
- Less Than 0.25% Reflectance Per Surface @ 880nm
Achromatic lenses consist of two optical components cemented together to form an achromatic doublet which is computer optimized to correct for on-axis spherical and chromatic aberrations.
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
Edge Thickness ET (mm): 1.72
Numerical Aperture NA: 0.25
Coating: VIS-NIR (400-1000nm)
Coating Specification: Rabs ≤0.25% @ 880nm, Ravg ≤1.25% @ 400 - 870nm, Ravg ≤1.25% @ 890 - 1000nm
Power (P-V) @ 632.8nm: 1.5λ
Irregularity (P-V) @ 632.8nm: λ/4
Bevel: Protective bevel as needed
Wavelength Range (nm): 400 - 1000
