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E-49-657 9mm Diameter x 18mm EFL Aspherized Achromatic Lens

Fosco Connect Part No.: E-49657

  • $ 196.00 or

E-49657 9mm Diameter x 18mm EFL Aspherized Achromatic Lens

Diameter (mm): 9.00 +0.00/-0.05
Effective Focal Length EFL (mm): 18.00
Back Focal Length BFL (mm): 14.3
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 8.10
Centering (arcmin): ≤5
Center Thickness CT (mm): 6.00
Center Thickness CT 1 (mm): 4.50
Center Thickness CT 2 (mm): 1.50
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 11.70
Radius R2 (mm): 16.90
Radius R3 (mm): −352.99
Edge Thickness ET (mm): 5.16
Surface Quality: 60-40, glass surfaces only
f/#: 2.00
Numerical Aperture NA: 0.25
Coating: VIS 0° (425-675nm)
Coating Specification: Ravg ≤0.4% @ 425 - 675nm
Note: VIS 0° Coating on First Surface, Second Surface is Aspheric Polymer
Operating Temperature (°C): -20°C to 80°C
Type: Achromatic Lens
Wavelength Range (nm): 425 - 675

Product Family Description

  • Unique Innovative Design, Low Cost, Color-Corrected Asphere
  • Better Color Correction than Standard Achromatic Lenses
  • Similar Spherical Aberration Correction to Machined Aspheres
  • Prescription Information Available

TECHSPEC®­ Aspherized Achromats bridge the gap between color-corrected achromats and spherical aberration corrected aspheres, resulting in cost effective, color corrected aspheric components. The TECHSPEC­® doublet lenses consist of two cemented elements that are matched for their color-correction ability and small RMS spot size.

The second surface of the doublet is fused with a molded polymer aspheric surface. These molds create a stable aspheric contour, removing or reducing wavefront errors present in typical achromats while boosting numerical aperture. Typical applications include: fiber optic focusing or collimation, image relay, inspection, scanning and high numerical aperture imaging.

These lenses were honored in the PhAST/Laser Focus World Innovation Award for Optics and Optical Components.



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