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  4. H-K9L (N-BK7) Plano-Convex Lenses
  • H-K9L (N-BK7) Plano-Convex Lenses
  • H-K9L (N-BK7) Plano-Convex Lenses
H-K9L (N-BK7) Plano-Convex Lenses H-K9L (N-BK7) Plano-Convex Lenses

H-K9L (N-BK7) Plano-Convex Lenses

  • Material: H-K9L
  • Diameter Tolerance: 0.0/-0.1mm
  • Thickness Tolerance: ±0.1mm
  • Focal Length Tolerance: ±1%
  • H-K9L (N-BK7) Plano-Convex Lenses
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    Description

    H-K9L (N-BK7) Plano-Convex Lenses

    H-K9L (N-BK7) plano-convex lenses are often used to focus parallel light or collimate point light sources, with excellent transmittance from visible to near infrared (350-2000nm). H-K9L is a commonly used optical glass. When the additional advantages of UV fused silica (good transmittance in the UV band and low thermal expansion coefficient) are not required, H-K9L is generally selected. When converging light, if an absolute magnification of less than 0.2 or greater than 5 is obtained, a plano-convex lens is usually selected. When the magnification is between 0.2 and 5, a biconvex lens is more suitable. To reduce spherical aberration, parallel light should be incident on the curved surface when focusing. A variety of coating specifications can be selected.

    Material: H-K9L
    Diameter Tolerance: 0.0/-0.1mm
    Thickness Tolerance: ±0.1mm
    Focal Length Tolerance: ±1%
    Design Wavelength: 587.6nm
    Clear Aperture: ≥90%
    Surface Quality: 40/20(Diameter≤25.4mm),
    60/40(Diameter>25.4mm)
    Flatness: λ/4@633nm
    Eccentric: ≤3′
    Chamfer: 0.3×45°(Diameter≤50.8mm),

    0.4×45°(Diameter>50.8mm)


    Coating:

    MGF AR coating: Single layer MgF2, Ravg<1.75% per surface@400-700nm

    Ravg<0.5% per surface@370-675nm
    Ravg<0.5% per surface@650-1050nm
    Ravg<0.5% per surface@1050-1620nm
    Ravg<1.25% per surface@400-1000nm
    R<0.25% per surface (532nm, 808nm, 1064nm)

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