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SC 239 neg.

Optical Lens by ORAFOL Fresnel Optics GmbH
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A negative Fresnel lens is the opposite of a positive Fresnel lens with diverging light rays.Focal Length: -102.8, Facet Spacing: 0.508, Fresnel Conjugate: infinity, Plano Conjugate: -102.8, Clear Aperture: 139.4, Thickness: 1.8.All dimensions in mm.Focal lengths listed apply to 546nm in PMMA (max. tolerance ± 5%).The outside size may be up to 5 - 20mm beyond the clear aperture.The standard thickness is 1.8mm ± 0.3.Other dimensions or special trimmings can be realised upon request.Special designs possible on request.

Product Specifications

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Product Details

  • Part Number
    SC 239 neg.
  • Manufacturer
    ORAFOL Fresnel Optics GmbH
  • Description
    -102.8 mm Negative fresnel lenses

General Parameters

  • Lens Type
    Fresnel Lens
  • Sub Type
    Negative Fresnel Lens
  • Focal Length
    -102.8 mm
  • Back Focal Length(BFL)
    -102.8 mm (Planol Conjugate)
  • Effective Focal Length(EFL)
    infinity (Fresnel Conjugate)
  • Thickness Tolerance
    ±0.3 mm
  • Center Thickness
    1.8 mm
  • Clear Aperture
    139.4 mm
  • Substrate/Material
    Polymethyl Methacrylate (PMMA)
  • Note
    Facet Spacing: 0.508 mm

Technical Documents
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