A-axis Watch Sapphire single crystal glass lens rough material/ optical grade Sapphire Watch glass lens/ rough sapphire glass plates for watch glass
ZMKJ / WUXI FINE CRYSTAL TECHNOLOGY Sapphire Crystal Watch Glass
Window Materials for High-class watches
Features of Keeppromise’s Sapphire:
Sapphire is scaled at Mohs hardness 9 ,the hardest next to diamond .
It has the excellent endurance and eternal btilliance and transparency .
This is why it has become intimate as the window materials of wristwatches with so many custoners all over the world .
|Edge Finish||Ground and beveled|
|Surface Quality||40-20 scratch-dig|
|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 m-2|
|Thermal Limit||22 W m-1 K-1|
|Thermal expansion coefficient||8.4 x 10-6 K-1|
Hardness is second only to diamonds
Much stronger than other optical materials (65,000 modulus of rupture)
Extremely hard surface
High scratch resistance and wear.
Very wide optical transmission band from UV to Mid IR
Extremely high melting point
High electrical resistance
Chemical properties of stability
High thermal conductivity for a non-conductor, even better than copper at cryogenic temperatures
High dielectric constant
Customized Colorful or White Sapphire Watch Glass
1. OEM Size and Design. Any shape is ok.
2. CE&Rohs Material. Europe, Japan,China, depend on your requirements.
3. We can provide engineer drawing.
4. Printting logo is ok. Camera Lens
5. Fast delivery date.
6. High quality
Our company export some of watch glass to Europe and USA；Japan......
We can provide the samples to check the quality. The Sample we have available,free charge.
About the Delivery
Q1. Are you a factory?
A1. Yes, we have a professional optical lens manufactruer in wuxi city of China.
Q2. What is the MOQ of optical lens?
A2. No MOQ for customer if optical lens is in stock. if for customized size ,MOQ is 3-10pcs by case.
Q3: Can I customize the products based on my need?
A3.Yes, we can customize the material, specifications and optical coating for your optical components based on your needs.
Q4. How can I get sample from you?
A4. Just send us your requirements, then we will send samples accordingly.
Q5. How many days will samples be finished? How about mass products?
A5. Generally, we need 1~2 weeks to finish the sample production.
As for the mass products, it depends on your order quantity.
Q6. What's the deliver time?
A6. (1) For inventory: the delivery time is 5 workdays after received your payment.
(2) For customized products: the delivery time is 7 to 20 workdays. According to the quantity.
Q7. How do you control lens quality?
A7. Producing process is in vacuum dust-free shop, like prepare material, mixed material and take out . Four times quality checking during production process.
Q8. How about your payment and quality service ?
A8. Usually 100％ payment before delivery, and if the products is disqualification and we will reback your