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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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