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

25mm Dia. x 50mm FL, NIR II Coated, Achromatic Lens

Stock #45-803 Other Coating Options
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Diameter (mm):
25.00 +0.0/-0.025
Effective Focal Length EFL (mm):
Focal Length Tolerance (%):
Back Focal Length BFL (mm):
Focal Length Specification Wavelength (nm):
Clear Aperture CA (mm):
Centering (arcmin):
Center Thickness CT 1 (mm):
Center Thickness CT 2 (mm):
Center Thickness Tolerance (mm):
Radius R1 (mm):
Radius R2 (mm):
Radius R3 (mm):
Edge Thickness ET (mm):
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Surface Quality:
Numerical Aperture NA:
NIR II (750-1550nm)
Coating Specification:
Rabs ≤1.5% @ 750 - 800nm
Rabs ≤1.0% @ 800 - 1550nm
Ravg ≤0.7% @ 750 - 1550nm
Power (P-V) @ 632.8nm:
Irregularity (P-V) @ 632.8nm:
Protective bevel as needed
Achromatic Lens
Wavelength Range (nm):
750 - 1550

Regulatory Compliance

RoHS 2015:
Reach 224:
Certificate of Conformance:

Product Family Description

  • Designed to Give Increased Resolution and Smaller Spot Sizes for NIR Wavelengths (750-1100nm)
  • Decreased Spherical Aberration for Monochromatic Sources Out to 2μm
  • Broadband AR Coating has <1% Reflectivity Between 750–1550nm

TECHSPEC® Near-IR (NIR) Achromatic Lenses are designed to provide the smallest spot size possible for polychromatic light between 750 and 1100nm. By utilizing our NIR doublets instead of standard doublets designed for the visible, RMS spot diameter can be reduced from 43μm to 22.5μm, for example, when using polychromatic light. Spot size will be smaller when focusing monochromatic sources. Near-IR doublets also reduce spherical aberration and have superior performance when used with a monochromatic source up to 2μm in wavelength. Typical applications for these doublets include: imaging lenses for the near infrared, focusing and expanding of NIR lasers, and focusing/collimating lenses for fiber optics and NIR LEDs.

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