Raw sapphire glass plate for wrist watch,dia34.5mm round shape surface lapped A-axis Al2O3 crystal watch glass
1. Comparison of Sapphire glass
sapphire waferis one of the hardest materials, and possesses very good transmission during the range of visible and near IR spectrum.It is widely used as optical window in infrared and far infrared military equipments, apparatus and instruments of satellite and space technology, and navigation and spaceflight, such as night infrared scope/sight and night vision camera, etc.The sapphire wafercrystal window is intensively applied in high-tech fields.
sapphire waferoptical windows are ideal for applications where high pressure, vacuum, or corrosive atmospheres are a consideration. Sapphire, a single crystal form of Al2O3, is resistant to attack by strong acids due to its high dielectric constant. It has high compressive strength and a high melting point. It is also resistant to UV radiation darkening.
|Sapphire||Transmission Range: 180-4500nm|
Refractive Index: 1.755@1000nm
|Best choice for scratch resistance applications Thinner optics Wide Transmission Range|
|Fused Silica||Transmission Range: 185-2500nm|
Refractive Index: 1.4858@308nm
Low Thermal Expansion Coefficient: 0.54 x 10-6K
|UV to IR spectrum|
Best choice for thermal resistance
Sapphire glass cover of applications
Specificaitons for sample in details
materials:sapphire optical grade
thickness:5.0mm lapped 2sp
surface: double side lapped
The Sapphire glass process
|Dimension tolerance||+/-0.1mm or +/-0.02mm|
|Surface quality (scratch & dig)||60/40, 40/20 or better|
|Clear aperture||>85%, >90%|
|Surface accuracy||L/4, L/2, L|
|Bevel||0.1~0.3mm x 45 degree|
|Coating||AR, BBAR or Custom|
Q: What's the way of shipping and cost?
A:(1) We accept DHL, Fedex, EMS etc.
(2) it is fine If you have your own express account ,
If not,we could help you ship them and Freight is in accordance with the actual settlement.
Q: How to pay?
A:100％ T/T, Paypal, we can Secure payment and Assurance payment.
Q: What's your MOQ?
A: (1) For inventory, the MOQ is 50pcs. if 100pcs it's better.
(2) For customized products, the MOQ is 50pcs up.
Q: What's the delivery time?
A: (1) For the standard products
For inventory: the delivery is 5 workdays after you place the order.
For customized products: the delivery is 2 -4 weeks after you order contact.
Q: Do you have standard products?
A: Our standard products in stock. as like substrates 2inch 0.43mm 1sp or
2sp thickness each orientation in stock.