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        PRODUCTS & SERVICES

        PRODUCTS & SERVICES

        Si lenses & windows

        2020-06-24

        Monocrystal Silicon is a sort of inert material with high hardness, and it is insoluble in water.

        Monocrystal Silicon has very good transmission performance between 1 to 7μm. Meanwhile, the transmission in far-infrared band of this material is also very good, which is superior to other IR materials.

        Monocrystal Silicon is normally used as substrate material for IR windows and filters in the 3-5 micron. And due to its high thermal conductivity and low density, monocrystal silicon is a common material used for laser reflectors.

        Optical Properties:

        Symbol    

        Si

        Atomic Number 

        14

        Crystal Growth Method

        Czohralski (CZ) & Floatzone (FZ)

        Orientation

        Resistivity (Ω·cm)

        3--50

        Resistivity  homogeneity (%)

        P Type<9   N Type<25

        Melting Point ()   

        1414

        Density(g/cm3)

        2.33

        Thermal Expansion Coefficient (10-6/K

        2.6

        Oxygen content and tolerance (at cm-3)

        5.07.8x107 ±0.5    

        Carbon contentat cm-3

        1.0x1016

        Metal contentat cm-3

        5.0x1010

        Metal on surfaceat cm-3

        Copper, chrome, iron, nickel, aluminum, zinc, natrium

        Granule

        μm)

        Youngs Modulus (Gpa)  

        165

        Poisson’s Ratio

        0.27

        Specifications:

        Silicon lenses:

        Diameter or length tolerance     

        Up to +0/-0.01mm

        Tolerance of thickness  

        Up to +/-0.01mm

        Surface figure 

        Up to λ/10 @632.8nm

        Centration

        Up to 5 arc seconds

        ETV

        ≤0.02mm

        Surface quality

        Up to 10-5 Scratch & Digs

        Clear aperture

        Up to 100% of the diameter

        Bevel

        <0.2mmx45°

        Coating

        According to your request

        Silicon windows:

        Diameter or length tolerance

        Up to +0/-0.01mm

        Thickness tolerance

        Up to +/-0.01mm

        Surface figure  

        Up to λ/20 @632.8nm

        Parallelism

        Up to 0.5 arc seconds

        Surface quality

        Up to 10-5 Scratch & Digs

        Bevel

        <0.2mmx45°

        Coating

        According to your request


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