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68-240

Optical Lens by Edmund Optics
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The 68-240 from Edmund Optics is a Optical Lens with Wavelength Range 2000 to 14000 nm, Focal Length 40 mm, Center Thickness 3.1 mm, Diameter 25 mm. More details for 68-240 can be seen below.

Product Specifications

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Product Details

  • Part Number
    68-240
  • Manufacturer
    Edmund Optics
  • Description
    25mm Dia x 40mm FL Uncoated, Ge Aspheric Lens

General Parameters

  • Lens Shape
    Aspheric Lens
  • Wavelength Range
    2000 to 14000 nm
  • Focal Length
    40 mm
  • Back Focal Length(BFL)
    37.89 mm
  • Effective Focal Length(EFL)
    40 mm
  • Center Thickness
    3.1 mm
  • Center Thickness Tolerance
    ±0.10 mm
  • Diameter
    25 mm
  • Clear Aperture
    0.9
  • Diameter Tolerance
    0/-0.1 mm
  • Aperture(f-number)
    1.61
  • Centration Error
    3-5 arcmin
  • Numerical Aperture
    0.31
  • Coating
    Uncoated
  • Substrate/Material
    Germanium (Ge)
  • Surface Accuracy
    0.3 µm
  • Surface Quality
    60-40 scratch-dig
  • RoHS
    Yes

Technical Documents
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