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Clear Transparent Sapphire Calender Window For wrist watch Glass Products

Categories Sapphire Dial Window
Place of Origin: Guangdong, China (Mainland)
Brand Name: Tianzhili
Model Number: customized
Price: Contact us for the details pl
Material: sapphire crystal, Sapphire
Usage: wrist watch
Shape: customized
Surface quality: 40/20
Coating: Anti-Reflective (AR) Coatings
Color: Transparent Clear
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    Clear Transparent Sapphire Calender Window For wrist watch Glass Products


    Clear Transparent Sapphire Dial Window For Optical Sapphire Glass Products


    Product Description


    Property

    Specification

    Thickness

    0.5-50mm

    Size tolerance

    0.02mm

    Edge Finish

    Ground and beveled

    Surface Quality

    40-20 scratch-dig

    Surface Flatness

    λ/4 @ 633 nm

    Parallelism

    ≤3 arc min (≤0.9 mrad)

    Clear Aperture

    >80% of central diameter

    Hardness (Knoop)

    1370 kg mm-2

    Young's modulus

    3.4 x 1011 N/m2

    Thermal Limit

    22 W m-1 K-1

    Thermal expansion coefficient

    8.4 x 10-6 K-1


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