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  • >Germanium Meniscus Lens

    • Germanium Meniscus Lens

    The germanium meniscus lens has an outer convex mirror and an inner concave mirror, which can change the direction and focus of the beam of light. Features: high transparency, high anti reflection, high thermal stability, etc. It can have high transmittance in both visible and infrared bands, with low reflectivity and low absorption. Used as a transmission or reflection device for optical paths in equipment such as LiDAR, optical sensors, and spectrometers. UM OPTICS can provide straight 2-300mm, thickness 0.12-60mm (accuracy can reach 20-10,1)/ 10L@633nm ）The germanium crescent lens has four major processes: rubber disc polishing, high-speed polishing, circular polishing, and CNC polishing. It has ZYGO, AFM, reflection and transmission eccentricity, 15 second angle measuring instrument, UV bonding centering system, non-contact laser thickness measuring instrument, 2D imaging instrument, and spherical diameter measuring instrument to ensure the accuracy of data. 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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    • Customized

    Please leave a message or inquire about the price online to ensure a satisfactory price for you.

    All products are provided with invoices, with a tax point of 13.

    The product undergoes multiple inspections before being stored, and the quality is guaranteed. Please use it with confidence.

    Spot products, shipped within 48 hours. For non stock or customized products, please consult.

    International order logistics include DHL, FedEx, TNT, and EMS

    When receiving the product, please ensure the integrity of the product packaging box first. If there is serious damage to the appearance, please refuse and contact us, and we will handle it for you as soon as possible.

    Optical products are special items and cannot be returned or exchanged unless there is a quality issue with the product itself

    If you need customization or bulk production, please contact us online and we will offer you a discounted price.

    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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    50.8 38.1 25.4 12.7
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    F200 F150 F127 F100 F75 F63.5 F50 F38 F25 F13
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    5.2 5.3 5.8 5.4 5.1 4.5 4.4 4.3 3.9 2.9 3 2.8 2.7 2 2.5
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    4.7 4.6 4.3 4.8 4 3.5 3.1 4.2 3.7 3 3.4 2.9 2.7 2.4 2.6 2.5 2.0 1.9 1.8 2.1
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    R1(-290.40) R2(199.07) R1(-200.40) R2(141.25) R1(-187.07) R2(127.35) R1(-139.64) R2(98.40) R1(-106.17) R2(76.64) R1(-86.70) R2(61.94) R1(-65.77) R2(48.53) R1(-223.40) R2(151.36) R1(-151.05) R2(102.33) R1(-109.65) R2(76.03) R1(-87.30) R2(61.94) R1(-77.62) R2(53.33) R1(-52.36) R2(38.04) R1(-161.06) R2(106.15) R1(-104.23) R2(72.78) R1(-93.11) R2(63.67) R1(-74.47) R2(51.45) R1(-53.95) R2(38.04) R1(-37.15) R2(26.30) R1(-79.43) R2(52.84) R1(-40.27) R2(27.13) R1(-22.96) R2(15.59)
    		 
    More+ Less 50.8 F200 5.2 4.7 R1(-290.40) R2(199.07)

    Φ50.8mm，F200，Germanium Meniscus Lenses

    Number：PGe07F018

    Dia(mm)：50.8 Focal Length(mm)：F200 Center Thickness(mm)：5.2 Edge Thickness(mm)：4.7 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：R1(-290.40) R2(199.07) Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Irregularity@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 50.8 F150 5.3 4.6 R1(-200.40) R2(141.25)

    Φ50.8mm，F150，Germanium Meniscus Lenses

    Number：PGe07F017

    Dia(mm)：50.8 Focal Length(mm)：F150 Center Thickness(mm)：5.3 Edge Thickness(mm)：4.6 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：R1(-200.40) R2(141.25) Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Irregularity@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 50.8 F127 5.2 4.3 R1(-187.07) R2(127.35)

    Φ50.8mm，F127，Germanium Meniscus Lenses

    Number：PGe07F016

    Dia(mm)：50.8 Focal Length(mm)：F127 Center Thickness(mm)：5.2 Edge Thickness(mm)：4.3 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：R1(-187.07) R2(127.35) Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Irregularity@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 50.8 F100 5.8 4.8 R1(-139.64) R2(98.40)

    Φ50.8mm，F100，Germanium Meniscus Lenses

    Number：PGe07F015

    Dia(mm)：50.8 Focal Length(mm)：F100 Center Thickness(mm)：5.8 Edge Thickness(mm)：4.8 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：R1(-139.64) R2(98.40) Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Irregularity@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 50.8 F75 5.4 4 R1(-106.17) R2(76.64)

    Φ50.8mm，F75，Germanium Meniscus Lenses

    Number：PGe07F014

    Dia(mm)：50.8 Focal Length(mm)：F75 Center Thickness(mm)：5.4 Edge Thickness(mm)：4 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：R1(-106.17) R2(76.64) Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Irregularity@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 50.8 F63.5 5.1 3.5 R1(-86.70) R2(61.94)

    Φ50.8mm，F63.5，Germanium Meniscus Lenses

    Number：PGe07F013

    Dia(mm)：50.8 Focal Length(mm)：F63.5 Center Thickness(mm)：5.1 Edge Thickness(mm)：3.5 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：R1(-86.70) R2(61.94) Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Irregularity@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 50.8 F50 5.2 3.1 R1(-65.77) R2(48.53)

    Φ50.8mm，F50，Germanium Meniscus Lenses

    Number：PGe07F012

    Dia(mm)：50.8 Focal Length(mm)：F50 Center Thickness(mm)：5.2 Edge Thickness(mm)：3.1 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：R1(-65.77) R2(48.53) Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Germanium（Ge） Irregularity@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant
    More+ Less 38.1 F200 4.5 4.2 R1(-290.40) R2(199.07)

    Φ38.1mm，F200，锗弯月透镜

    Number：PGe07F008

    Dia(mm)：38.1 Focal Length(mm)：F200 Center Thickness(mm)：4.5 Edge Thickness(mm)：4.2 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：R1(-290.40) R2(199.07) Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：锗 Irregularity@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：未镀膜 REACH：符合标准 ROHS：符合标准
    More+ Less 38.1 F150 4.4 4 R1(-223.40) R2(151.36)

    Φ38.1mm，F150，锗弯月透镜

    Number：PGe07F007

    Dia(mm)：38.1 Focal Length(mm)：F150 Center Thickness(mm)：4.4 Edge Thickness(mm)：4 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：R1(-223.40) R2(151.36) Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：锗 Irregularity@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：未镀膜 REACH：符合标准 ROHS：符合标准
    More+ Less 38.1 F127 4.5 4 R1(-187.07) R2(127.35)

    Φ38.1mm，F127，锗弯月透镜

    Number：PGe07F006

    Dia(mm)：38.1 Focal Length(mm)：F127 Center Thickness(mm)：4.5 Edge Thickness(mm)：4 Design Wavelength(μm)：10.6 Radius of Curvature(mm)：R1(-187.07) R2(127.35) Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：锗 Irregularity@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：未镀膜 REACH：符合标准 ROHS：符合标准
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    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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