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Address: Rm5-616,No.851,Dianshanhu avenue, Qingpu area，Shanghai city，CHINA
Contact name:Wang
SHANGHAI FAMOUS TRADE CO.,LTD |
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Al2O3 sapphire glass optical lens for watch glass,A-axis round Sapphire rough lens for watch protective screem glass
1. what is sapphire glass?
Sapphire is 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 crystal window is intensively applied in high-tech
fields.
Sapphire optical 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.
| Material | Sapphire(Al2O3) |
| Density(20°C) Kg/m3 | 3.98×103 |
| Crystal Structure | hexagonal |
| Crystal lattice constant | a=4.785Å c=12.991 Å |
| Mohs hardness | 9 |
| Melting Point | 2045°C |
| Boiling Point | 3000°C |
| Coefficient of Thermal Expansion | α=5.8×10 -6 /K |
| Specific heat | 0.418W.s/g/k |
| Thermal conduction | 25.12W/m/k(@100°C) |
| Refractive Index (nd) | no=1.768 |
| ne=1.76 | |
| dn/dt | 13×10-6/K(@633nm) |
| Tranmission | T≈80%(0.3~5um) |
| Permittivity | 11.5(//c), 9.3(⊥c) |
Sapphire applications:
Sapphire is a hard crystal,it widely been used for watch and mobilephone, Beauty equipment ,lasers,LED, and so on.
1. LED chip
2. optical wafers for phone cover,camera, fingerprint identification cover glass,scanneer wafer
3. watch glass lens
4. sapphire optical lens for high transmittance inquire
5. sapphire bearing ＆sapphire ball for measurement machine
2. Pictures Size For Sapphire watch lens
Materials: 99.999％ sapphire optical grade ,no bubble ,color and crystal boundar.
size:dia40.5x1.0mmt, 35x35x1.0mmt, dia39.5x4.0mmt
Orientation:A(1010)±0.5°,
Tolerance:±0.03mm
surface: double side poshlied or rough surface
Ra:＜0.5nm
SD:40/20 ,60/40
Flatnees: 1/2 Lambda(or 1/4,1‘~2’, is ok)
3. Our products
4.our sapphire process step
.
FAQ:
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 and Freight is in accordance byh the actual settlement.
Q: What's your MOQ?
A: (1) For inventory, the MOQ is 30pcs. if 100pcs it's better.
(2) For customized commen products, the MOQ is 30pcs 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.
