SHANGHAI FAMOUS TRADE CO.,LTD
SHANGHAI FAMOUS TRADE CO.,LTD For The Good Reputation,By The Best Quality ,With The Fastest Efficiency.
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double side polished Al2O3 sapphire crystal watch glass lens,watch glass by sapphire,scanner cover glass by sapphire,
1. Comparison of Sapphire glass
1. suitable for high power,high-pressure applications and vacuum or corrosive atmospheres.
2. Sapphire is a single crystal form of alumina.The material is extremely hard and resistant to attack by srong acid.
3. It has high compressive strength, a high melting point and excellent thermal conductivity.
4. Transmission range is from 150 nm to 5 µm.
5. low distortion,low scatter and excellent parallelism for laser and non-laser applications.
| Material | Properties | Applications |
| Sapphire | Transmission Range: 180-4500nm Refractive Index: 1.755@1000nm Strong Hardness | 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 application. |
| other |
Sapphire watch glass cover of applications
Specificaitons for sample in details
| Product Name | Single dome sapphire watch glass |
| Material | Sapphire crystal |
| Color | transparent |
| Diameter Tolerance | +/-0.025mm |
| Surface quality | 40/20 |
| Diameter | 35mm |
| Thickness | 1.0mm |
| Application | For watch repair |
Sapphire glass process step of our factory
---->---->---->——>| General specifications |
| Diameter | 0.2-300mm |
| Thickness | 0.1-200mm |
| 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 |
| Parallelism | +/-3' ,+/-30'' |
| Bevel | 0.1~0.3mm x 45 degree |
| Coating | AR, BBAR or Custom |
FAQ
1. How long have you been trading for?
5 years
2. How many employees do you have?
40 people
3. Do you manufacture?
Yes
4. Where are your manufacturing facilities based?
ZMKJ is at SHANGHAI city, Factory is at wuxi Jiangsu province.
5. What products do you specialize in producing?
Optical lens, sapphire windows, sapphire substrate and other material crystal wafers.
6. What is your quote turnaround time?
1-3 days
7. What are your payment terms?
T/T;L/C pay term by case.