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  • Double-Concave Lenses

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    Optical Lenses
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    Double-concave lens has a negative focal length and is useful for 1:1 imaging and in multi-element systems. also known as biconcave or equal concave.

     

    Standard Specifications
    Materials: BK7, UVFS, CaF2, BaF2, ZnS, ZnSe, Ge, Si, Sapphire, Crown Glass

    (Other glass and crystal types available upon request)

    Surface Figure: Both Surfaces
    λ/10 at 633 nm
    λ/4 at 633 nm
    λ/40 at 10.6 µm
    λ/4 at 633 nm
    Surface Quality: Both Surfaces
    10-5
    20-10
    40-20
    20-10
    Diameter Tolerance: + 0.00, – 0.02mm
    Thickness Tolerance: ± 0.05mm
    Radius Tolerance: ± 2%
    Centration Error: < 3 arc minutes
    Bevels: 0.1 – 0.5 at 45º
    Clear Aperture: Central 90% of diameter
    Coating: Narrowband AR

    Dual Wavelength AR (532/1064)

    BBAR

    Single MgF2AR

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  • Sherlan Optics

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    Sherlan Optics
    Tel: 86-431-89235797
    Mobile:86-18946645479
    Add: Boxue Road, Changchun, China
    Web:www.sherlan.com