30-40mm Openings Double Domed Crystal Sapphire Screen Lens Protector for Smartwear
Why Choose sapphire crystal?
1. Thinner and Stronger than Standard Glass Windows
2. Transmits Wavelengths Ranging From UV to Mid-Infrared
3. Features Extreme Surface Hardness and Chemical Resistance
Sapphire is the general name for corundum stones of all colors except the red ruby. Its main ingredient is alumina (AI2O3). Sapphire glass is a synthetic sapphire,Gem-grade sapphires can be easily and cheaply produced in the laboratory and have the same chemical composition and physical properties as natural gems.
Sapphire crystal is more reflective than mineral crystal due to its higher index of refraction. (1,8 compared to 1,47). Applying one or more layers of AR (anti-reflective) coating will limit this reflection to a very low level. Very often, lines and marks on the top surface of a sapphire crystal are mistaken for scratches but are actually the scratched AR coating, or just AR coating wearing off after time. An AR coating on the inside of the crystal provides a good AR performance while avoiding this problem. If you do scratch a sapphire crystal, then it cannot be polished away and will need to be replaced.
Production description:
Coating | Blue coating AR coating , AF coating , AG coating |
Thickness | 1.0mm 1.2mm 1.5mm 2.0mm 2.5mm 3.0mm, Customized |
Size | Diameter:20mm-50mm, Customized |
Bevel | 0.1-0.5mm |
Company profile:
JADEZONE Sapphire optical Co.,Ltd. is a factory which is specialized on sapphire glass with 10 years export expreience. Factory covers 3,000 square meters. We got eight patents and one software copyright, and passed the ISO9001 quality certification and ISO14000 environmental certification.
About Factory:
Our Certificates:
Packing&Delivery:
About Packing : Stand export carton About Delivery: DHL/UPS/TNT/EMS/FedEX ,you can choose whatever you like.
FAQ
Q: Do you provide samples ? is it free or extra ?
A: Yes, but it's a precision product that requires extra cost and freight.
Q: How can I customize my products?
A: Attach your drawings with details (Surface treatment, material, quantity and special requirements etc).
Q: How did you test the product before they are packed?
A: We have strict QC procedure, each product will be tested by three times even more with professional machine before packing.
Q: What if the products we received are not good?
A: Contact us without hesitation, our special after-sales service will take the responsibility.
Q: What's the material of your products ?
A: Sapphire