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  • >Germanium Plano-convex Lens

    • Germanium Plano-convex Lens

    Germanium plano-convex lens has one side flat and one side convex. Usually made of germanium single crystal material, it is used to concentrate light and focus it into a point. In equipment such as LiDAR, optical sensors, spectrometers, etc., it can be used as a light path transmission or reflection device. During manufacturing, precision machining and polishing processes are usually required to ensure surface quality and optical performance. Meanwhile, in order to improve transmittance and anti reflection performance, coating treatment is usually required. 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) Radius of Curvature(mm) Compare
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    76.2 50.8 38.1 25.4 12.7
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    F500 F150 F300 F75 F200 F100 F50.8 F25.4
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    3.5 4.7 2.5 4 2.4 2.8 2.2 2.3 2.1
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    3 3.1 2.5 2.6 2.0
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    1500 452.9 855.1 229.1 597.16 299.9 151.01 76.05
    		 
    More+ Less 76.2 F500 3.5 3 1500

    Φ76.2mm，F500，Germanium Planoconvex Lenses

    Number：PGe03H002

    Dia(mm)：76.2 Focal Length(mm)：F500 Center Thickness(mm)：3.5 Edge Thickness(mm)：3 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：1500 Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Power@632.8nm：/ Irregularity@632.8nm：λ/4 PV@632.8nm：/ Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 76.2 F150 4.7 3.1 452.9

    Φ76.2mm，F150，Germanium Planoconvex Lenses

    Number：PGe03H001

    Dia(mm)：76.2 Focal Length(mm)：F150 Center Thickness(mm)：4.7 Edge Thickness(mm)：3.1 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：452.9 Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Power@632.8nm：/ Irregularity@632.8nm：λ/4 PV@632.8nm：/ Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 50.8 F300 2.5 2.5 855.1

    Φ50.8mm，F300，Germanium Planoconvex Lenses

    Number：PGe03F016

    Dia(mm)：50.8 Focal Length(mm)：F300 Center Thickness(mm)：2.5 Edge Thickness(mm)：2.5 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：855.1 Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Power@632.8nm：/ Irregularity@632.8nm：λ/4 PV@632.8nm：/ Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 50.8 F75 4 2.6 229.1

    Φ50.8mm，F75，Germanium Planoconvex Lenses

    Number：PGe03F012

    Dia(mm)：50.8 Focal Length(mm)：F75 Center Thickness(mm)：4 Edge Thickness(mm)：2.6 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：229.1 Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Power@632.8nm：/ Irregularity@632.8nm：λ/4 PV@632.8nm：/ Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 38.1 F150 2.4 2.0 452.9

    Φ38.1mm，F150，Germanium Planoconvex Lenses

    Number：PGe03F006

    Dia(mm)：38.1 Focal Length(mm)：F150 Center Thickness(mm)：2.4 Edge Thickness(mm)：2.0 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：452.9 Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Power@632.8nm：/ Irregularity@632.8nm：λ/4 PV@632.8nm：/ Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 38.1 F75 2.8 2.0 229.1

    Φ38.1mm，F75，Germanium Planoconvex Lenses

    Number：PGe03F003

    Dia(mm)：38.1 Focal Length(mm)：F75 Center Thickness(mm)：2.8 Edge Thickness(mm)：2.0 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：229.1 Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Power@632.8nm：/ Irregularity@632.8nm：λ/4 PV@632.8nm：/ Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 25.4 F200 2.2 2.0 597.16

    Φ25.4mm，F200，Germanium Planoconvex Lenses

    Number：PGe03E016

    Dia(mm)：25.4 Focal Length(mm)：F200 Center Thickness(mm)：2.2 Edge Thickness(mm)：2.0 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：597.16 Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Power@632.8nm：/ Irregularity@632.8nm：λ/4 PV@632.8nm：/ Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 25.4 F100 2.3 2.0 299.9

    Φ25.4mm，F100，Germanium Planoconvex Lenses

    Number：PGe03E013

    Dia(mm)：25.4 Focal Length(mm)：F100 Center Thickness(mm)：2.3 Edge Thickness(mm)：2.0 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：299.9 Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） 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 F50.8 2.1 2.0 151.01

    Φ12.7mm，F50.8，Germanium Planoconvex Lenses

    Number：PGe03C002

    Dia(mm)：12.7 Focal Length(mm)：F50.8 Center Thickness(mm)：2.1 Edge Thickness(mm)：2.0 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：151.01 Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） 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 F25.4 2.3 2.0 76.05

    Φ12.7mm，F25.4，Germanium Planoconvex Lenses

    Number：PGe03C001

    Dia(mm)：12.7 Focal Length(mm)：F25.4 Center Thickness(mm)：2.3 Edge Thickness(mm)：2.0 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：76.05 Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Power@632.8nm：/ Irregularity@632.8nm：λ/4 PV@632.8nm：/ Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    Material Data
    Optical Properties
    Transmission Range2-15μm
    Reflection Loss4.0028@10.6μm
    Absorption Coefficienet

    1.3×10-3@3.8μm

    3×10-2@10.6μm

    StructureCubic Crystal System
    Cleavage Planes<111>
    Physical Properties
    Density [g/cm3]5.33
    Melting Point [℃]936
    Thermal Conductivity [W/(m×K)]58.61 @ 293K
    Thermal Expansion [10-6/K]6.1 @ 298K
    Knoop Hardness [kg/mm2]780
    Specific Heat Capacity [J/(kg×K)]310
    Dielectric Constant16.6 @9.37 GHz
    Young's Modulus (E) [GPa]102.7
    Shear Modulus(G) [GPa]67
    Bulk Modulus(K) [GPa]77.2
    Poisson Coefficient0.28
    Chemical Properties
    Solubility / g/LInoluble
    Molecular Weight / g/mol72.61

    Germanium Transmittance Curve

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