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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

12.7mm Dia. x 50.8mm FL, VIS-NIR Coated, 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 #49-790 Contact Us
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Other Coating Options
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Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
A$154.40
Volume Pricing
Qty 1-5 A$154.40 each
Qty 6-25 A$123.20 each
Qty 26-49 A$116.00 each
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Specifications

General

Type:
Achromatic Lens

Physical & Mechanical Properties

Diameter (mm):
12.70 +0.0/-0.025
Clear Aperture CA (mm):
11.70
Centering (arcmin):
<1
Center Thickness CT (mm):
4.00 ±0.20
Center Thickness CT 1 (mm):
2.50 ±0.10
Center Thickness CT 2 (mm):
1.50 ±0.10
Edge Thickness ET (mm):
3.16
Bevel:
Protective as needed

Optical Properties

Effective Focal Length EFL (mm):
50.80
Focal Length Tolerance (%):
±1
Back Focal Length BFL (mm):
48.86
Focal Length Specification Wavelength (nm):
587.6
Radius R1 (mm):
33.17
Radius R2 (mm):
-23.98
Radius R3 (mm):
-89.03
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-BAK1 / N-SF15
Surface Quality:
40-20
Numerical Aperture NA:
0.13
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
Wavelength Range (nm):
425 - 675

Regulatory Compliance

RoHS 2015:
Compliant
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Certificate of Conformance:
View
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REACH 241:
Compliant
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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 0.25% 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.

Technical Information

Coating Curves

Compatible Mounts

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