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

18mm Dia. x 27mm FL, VIS-NIR, Inked, Achromatic Lens

Any of our lenses with a diameter of 5mm or greater can be specified with blackened edges. To specify the blackening, simply append a –INK to the BBAR coated stock number.
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Stock #49-339-INK Contact Us
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Other Coating Options
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€112,00
Qty 1-5
€112,00
Qty 6+
€89,50
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Diameter (mm):
18.00 ±0.025
Effective Focal Length EFL (mm):
27.00
Focal Length Tolerance (%):
±1
Back Focal Length BFL (mm):
21.74
Focal Length Specification Wavelength (nm):
587.6
Clear Aperture CA (mm):
17.00
Centering (arcmin):
<1
Center Thickness CT (mm):
9.27 ±0.20
Center Thickness CT 1 (mm):
7.67 ±0.10
Center Thickness CT 2 (mm):
1.60 ±0.10
Radius R1 (mm):
18.70
Radius R2 (mm):
-13.11
Radius R3 (mm):
-119.12
Edge Thickness ET (mm):
6.62
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-BAF10 / N-SF10
Surface Quality:
40-20
f/#:
1.5
Numerical Aperture NA:
0.33
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:
Compliant
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Certificate of Conformance:
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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

TECHSPEC® VIS-NIR Coated Achromatic Lenses consist of two optical components cemented together to form an achromatic doublet. The doublet is computer optimized to correct for on-axis spherical and chromatic aberrations. TECHSPEC® VIS-NIR Coated Achromatic Lenses have visible/near-infrared broadband anti-reflection coating, which is specially optimized to yield maximum transmission (>99%) in the near-infrared. The achromatic lenses reduce reflection to less than 0.25 percent per surface at 880nm. Magnesium Fluoride coated and VIS 0° coated achromats are also available.