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12.5mm Dia. x 20mm FL, VIS 0°, Inked, Achromatic Lens

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Stock #47-661-INK 3-5 days
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S$136.50
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S$136.50
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S$115.88
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Diameter (mm):
12.50 ±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 (mm):
6.35 ±0.10
Center Thickness CT 1 (mm):
5.25 ±0.05
Center Thickness CT 2 (mm):
1.10 ±0.05
Radius R1 (mm):
13.98
Radius R2 (mm):
-9.35
Radius R3 (mm):
-76.14
Edge Thickness ET (mm):
4.62
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Surface Quality:
40-20
f/#:
1.6
Numerical Aperture NA:
0.31
Coating:
VIS 0° (425-675nm)
Coating Specification:
Ravg ≤0.4% @ 425 - 675nm
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):
425 - 675

Regulatory Compliance

RoHS 2015:
Reach 209:
Certificate of Conformance:

Product Family Description

  • Designed for 0° Angle of Incidence
  • Less Than 0.4% Reflectance Per Surface from 425 - 675nm
  • MgF2 and VIS-NIR 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.