raw sapphire lens for watch screem glass,optical grade square or
roud shaped sapphire watch glass raw plates
1. Why sapphire
Sapphire is a single crystal - Aluminum Oxide (Al2O3) - which is
colorless and optically clear. Synthetic sapphire is grown in
boules (bulk pieces) no larger than 300mm in diameter. It can also
be grown into shapes such as sheets, ribbons, domes and tubes with
very smooth surface qualities, high purity and optical
translucence. When used "as grown" there is very little need for
grinding and polishing.
Comparison of optical window materials
| 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 | | |
Comparison Advantagement
- Mechanically second only to diamond. One of the hardest and most
scratch resistant materials
- available. The high modulus of elasticity and high tensile strength
make it extremely wear,
- abrasion and impact resistant.
- Colorless optical characteristics are superior to any standard
glass, with up to a 98.5%
- transmission and a transmission window from 190 nanometers in the
UV to 5 microns in the IR.
- No solarization in high-radiation systems.
- High dielectric constant and low loss tangent makes it a great
electrical insulator and low
- loss long wavelength window.
- Thermally very stable. Does not lose any of its mechanical and
optical qualities from cryogenic
- to over 2000C.
- Thermal conductivity greater than other optical materials and most
dielectrics.
- No surface damage and devitrification due to extreme thermal
cycling
- Does not sag or slump at very elevated temperatures.
- Highly corrosion resistant. More resistant to corrosive chemicals
than most standard hard
- materials available.
The size for picture sapphire glass sample
size:39.5x4.45mmt 34.5x5.0mmt
thickness:4.45mm as-cut grade no polished
surface: double side Lapped
Ra:＜0.3nm
SD:40/20 ,60/40,20/10 by polished
TTV:＜15um
Bow:＜20um
sample
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 ship them and Freight is in accordance with the actual settlement.
Q: How to pay?
A:100％ T/T, Paypal, 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.
Thanks~~~
