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

25.4mm Dia. x 76.2mm FL, VIS 0°, 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 #49-781-INK Contact Us
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Other Coating Options
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€138,00
Volume Pricing
Qty 1-5 €138,00 each
Qty 6-25 €110,00 each
Qty 26-49 €104,00 each
Need More? Request Quote
Prices shown are exclusive of VAT/local taxes
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Specifications

General

Type:
Achromatic Lens

Physical & Mechanical Properties

Diameter (mm):
25.40 ±0.025
Clear Aperture CA (mm):
24.40
Centering (arcmin):
<1
Center Thickness CT (mm):
10.00 ±0.20
Center Thickness CT 1 (mm):
7.00 ±0.10
Center Thickness CT 2 (mm):
3.00 ±0.10
Edge Thickness ET (mm):
7.85
Bevel:
Protective as needed

Optical Properties

Effective Focal Length EFL (mm):
76.20
Focal Length Tolerance (%):
±1
Back Focal Length BFL (mm):
71.14
Focal Length Specification Wavelength (nm):
587.6
Radius R1 (mm):
50.85
Radius R2 (mm):
-40.06
Radius R3 (mm):
-148.78
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-SSK8 / SF56
Surface Quality:
40-20
f/#:
3.00
Numerical Aperture NA:
0.17
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
Wavelength Range (nm):
425 - 675

Regulatory Compliance

Certificate of Conformance:
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Custom

Edmund Optics offers comprehensive custom manufacturing services for optical and imaging components tailored to your specific application requirements. Whether in the prototyping phase or preparing for full-scale production, we provide flexible solutions to meet your needs. Our experienced engineers are here to assist—from concept to completion.

Our capabilities include:

  • Custom dimensions, materials, coatings, and more
  • High-precision surface quality and flatness
  • Tight tolerances and complex geometries
  • Scalable production—from prototype to volume

Learn more about our custom manufacturing capabilities or submit an inquiry here.

Product Details

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

TECHSPEC® VIS 0° 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.  Achromatic lenses are best for applications involving multi-color (white light) imaging due to their specific doublet lens pairing that enables them to correct the color separation inherent in glass. TECHSPEC® VIS 0° Coated Achromatic Lenses provide optimized transmission for 425 – 675nm, reducing average reflection to 0.4%. MgF2 and VIS-NIR Coated Achromats are also available on our website. 

Technical Information

Coating Curves

Compatible Mounts

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