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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

2mm Dia. x 4mm FL, VIS-NIR Coated, Achromatic Lens

Stock #84-128
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Qty 1-5
£191.25
Qty 6+
£153.00
Volume Pricing
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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
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Surface Quality:
40-20
f/#:
2.00
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
Type:
Achromatic Lens
Wavelength Range (nm):
400 - 1000

Regulatory Compliance

RoHS 2015:
Reach 219:

Product Family Description

  • Designed for 0° Angle of Incidence
  • Less Than 0.25% Reflectance Per Surface @ 880nm
  • MgF2 and VIS 0° Coated Achromats Also Available

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. Magnesium Fluoride coated and VIS 0° coated achromats also available.

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