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  • >Calcium Fluoride Plano-concave Lens

    • Calcium Fluoride Plano-concave Lens

    Calcium fluoride plano-concave lenses have a flat surface on one side and a concave surface on the other, commonly used for beam collimation, increasing (decreasing) focal length, or enlarging (reducing) images. Calcium fluoride material has the characteristics of a wide transmission spectrum range, high damage threshold, low fluorescence, and high uniformity. In addition, it also has a negative focal length, which can be used for beam collimation and expanding the focal length of optical systems. It can be coated with MgF2, UV-AR, UV-VIS, VIS-EXT, VIS-NIR, NIR I, NIR II, Telecom NIR, SWIR, SWIR, YAG-BBAR and other film systems.

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    Technical Parameter

    Material Data

    Transmittance

    Application Field

    Related Products
      Dia(mm) Focal Length(mm) Center Thickness(mm) Edge Thickness(mm) Design Wavelength(μm) Radius of Curvature(mm) Compare
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    25.4 12.7
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    F-500 F-200 F-100 F-75 F-40 F-150 F-25 F-18
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    4 3.5 3 2.5 2 1.8 2.7 2.4
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    4.4 4.9 5.1 7.5 2 3 5.6 5.30
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    0.588 2.94
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    -216.9 -86.8 -43.4 -32.5 -17.4 -83.6 -62.7 -31.4 -10.9 -7.8
    		 
    More+ Less 25.4 F-500 4 4.4 0.588 -216.9

    Φ25.4mm，F-500，Calcium Fluoride Plano Concave Lenses

    Number：PCa04E008

    Dia(mm)：25.4 Focal Length(mm)：F-500 Center Thickness(mm)：4 Edge Thickness(mm)：4.4 Design Wavelength(μm)：0.588 Radius of Curvature(mm)：-216.9 Surface Quality：40-20 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Calcium Fluoride（CaF2） Power@632.8nm：3/2λ Irregularity@632.8nm：/ PV@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 25.4 F-200 3.5 4.4 0.588 -86.8

    Φ25.4mm，F-200，Calcium Fluoride Plano Concave Lenses

    Number：PCa04E007

    Dia(mm)：25.4 Focal Length(mm)：F-200 Center Thickness(mm)：3.5 Edge Thickness(mm)：4.4 Design Wavelength(μm)：0.588 Radius of Curvature(mm)：-86.8 Surface Quality：40-20 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Calcium Fluoride（CaF2） Power@632.8nm：3/2λ Irregularity@632.8nm：/ PV@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 25.4 F-100 3 4.9 0.588 -43.4

    Φ25.4mm，F-100，Calcium Fluoride Plano Concave Lenses

    Number：PCa04E006

    Dia(mm)：25.4 Focal Length(mm)：F-100 Center Thickness(mm)：3 Edge Thickness(mm)：4.9 Design Wavelength(μm)：0.588 Radius of Curvature(mm)：-43.4 Surface Quality：40-20 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Calcium Fluoride（CaF2） Power@632.8nm：3/2λ Irregularity@632.8nm：/ PV@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 25.4 F-75 2.5 5.1 0.588 -32.5

    Φ25.4mm，F-75，Calcium Fluoride Plano Concave Lenses

    Number：PCa04E005

    Dia(mm)：25.4 Focal Length(mm)：F-75 Center Thickness(mm)：2.5 Edge Thickness(mm)：5.1 Design Wavelength(μm)：0.588 Radius of Curvature(mm)：-32.5 Surface Quality：40-20 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Calcium Fluoride（CaF2） Power@632.8nm：3/2λ Irregularity@632.8nm：/ PV@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 25.4 F-40 2 7.5 0.588 -17.4

    Φ25.4mm，F-40，Calcium Fluoride Plano Concave Lenses

    Number：PCa04E004

    Dia(mm)：25.4 Focal Length(mm)：F-40 Center Thickness(mm)：2 Edge Thickness(mm)：7.5 Design Wavelength(μm)：0.588 Radius of Curvature(mm)：-17.4 Surface Quality：40-20 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Calcium Fluoride（CaF2） Power@632.8nm：3/2λ Irregularity@632.8nm：/ PV@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 12.7 F-200 1.8 2 2.94 -83.6

    Φ12.7mm，F-200，Calcium Fluoride Plano Concave Lenses

    Number：PCa04C011

    Dia(mm)：12.7 Focal Length(mm)：F-200 Center Thickness(mm)：1.8 Edge Thickness(mm)：2 Design Wavelength(μm)：2.94 Radius of Curvature(mm)：-83.6 Surface Quality：40-20 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Calcium Fluoride（CaF2） Power@632.8nm：/ Irregularity@632.8nm：λ/4 PV@632.8nm：/ Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 12.7 F-150 2.7 3 2.94 -62.7

    Φ12.7mm，F-150，Calcium Fluoride Plano Concave Lenses

    Number：PCa04C010

    Dia(mm)：12.7 Focal Length(mm)：F-150 Center Thickness(mm)：2.7 Edge Thickness(mm)：3 Design Wavelength(μm)：2.94 Radius of Curvature(mm)：-62.7 Surface Quality：40-20 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Calcium Fluoride（CaF2） Power@632.8nm：/ Irregularity@632.8nm：λ/4 PV@632.8nm：/ Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 12.7 F-75 2.4 3 2.94 -31.4

    Φ12.7mm，F-75，Calcium Fluoride Plano Concave Lenses

    Number：PCa04C008

    Dia(mm)：12.7 Focal Length(mm)：F-75 Center Thickness(mm)：2.4 Edge Thickness(mm)：3 Design Wavelength(μm)：2.94 Radius of Curvature(mm)：-31.4 Surface Quality：40-20 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Calcium Fluoride（CaF2） Power@632.8nm：/ Irregularity@632.8nm：λ/4 PV@632.8nm：/ Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 12.7 F-25 2.5 5.6 0.588 -10.9

    Φ12.7mm，F-25，Calcium Fluoride Plano Concave Lenses

    Number：PCa04C002

    Dia(mm)：12.7 Focal Length(mm)：F-25 Center Thickness(mm)：2.5 Edge Thickness(mm)：5.6 Design Wavelength(μm)：0.588 Radius of Curvature(mm)：-10.9 Surface Quality：40-20 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Calcium Fluoride（CaF2） Power@632.8nm：3λ/2 Irregularity@632.8nm：/ PV@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 12.7 F-18 2 5.30 0.588 -7.8

    Φ12.7mm，F-18，Calcium Fluoride Plano Concave Lenses

    Number：PCa04C001

    Dia(mm)：12.7 Focal Length(mm)：F-18 Center Thickness(mm)：2 Edge Thickness(mm)：5.30 Design Wavelength(μm)：0.588 Radius of Curvature(mm)：-7.8 Surface Quality：40-20 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Calcium Fluoride（CaF2） Power@632.8nm：3λ/2 Irregularity@632.8nm：/ PV@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    Material Data
    Optical Properties
    Transmission Range0.13-10μm
    Transmittance>94%@193nm-7.87μm
    Refractive Index

    1.4288@2.5μm

    1.39908@5μm

    Reflection Loss5.4%@5μm(both surfaces)
    Absorption Coefficienet7.8×10-4@2.7μm
    StructureCubic Crystal System
    Cleavage Planes<111>
    Physical Properties
    Density [g/cm3]3.18
    Melting Point [℃]1420
    Thermal Conductivity [W/(m×K)]9.71 @ 293K
    Thermal Expansion [10-6/K]18.5 @ 273K
    Knoop Hardness [kg/mm2]158.3
    Specific Heat Capacity [J/(kg×K)]854
    Dielectric Constant6.76 @ 1 MHz
    Young's Modulus (E) [GPa]75.8
    Shear Modulus(G) [GPa]33.77
    Bulk Modulus(K) [GPa]82.71
    Poisson Coefficient0.26
    Chemical Properties
    Solubility / g/L0.016g @ 20℃
    Molecular Weight / g/mol78.0748

    Calcium Fluoride Transmittance CurveCalcium Fluoride Transmittance Curve

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