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68-258

Optical Lens by Edmund Optics
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The 68-258 from Edmund Optics is a Optical Lens with Wavelength Range 8000 to 12000 nm, Focal Length 75 mm, Center Thickness 2.8 mm, Diameter 25 mm. More details for 68-258 can be seen below.

Product Specifications

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Product Details

  • Part Number
    68-258
  • Manufacturer
    Edmund Optics
  • Description
    25mm Dia x 75mm FL 8-12µm Coated, Ge Aspheric Lens

General Parameters

  • Lens Shape
    Aspheric Lens
  • Wavelength Range
    8000 to 12000 nm
  • Focal Length
    75 mm
  • Back Focal Length(BFL)
    72.3 mm
  • Effective Focal Length(EFL)
    75 mm
  • Center Thickness
    2.8 mm
  • Center Thickness Tolerance
    ±0.10 mm
  • Diameter
    25 mm
  • Clear Aperture
    0.9
  • Diameter Tolerance
    0/-0.1 mm
  • Aperture(f-number)
    2.94
  • Centration Error
    3-5 arcmin
  • Numerical Aperture
    0.17
  • Coating
    8 - 12 µm
  • Substrate/Material
    Germanium (Ge)
  • Surface Accuracy
    0.3 µm
  • Surface Quality
    60-40 scratch-dig
  • RoHS
    Yes
  • Note
    Coating Specification:- Ravg 2.0% @ 8 - 12 µm

Technical Documents
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