sapphire optical glass window,Al2O3 sapphire lens for window
,sapphire glass,sapphire led substrates .sapphire wafer
1.
About Sapphire
Feature
+ can be customized as design size,shape,bevel
chamfer,tolerance,artwork;
+ have normal size in stock;
+ Widely uesd for watch glass,optical window,lens,militry etc;
+ The material is synthetic sapphire(hardness 9H) ;
+ Flatness: <20μm;
+ Surface quality:40/20;
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.
Comparison of optical window materials
| Material | Properties | Applications |
| BK7 | Transmission Range: 330-2100nm
Refractive Index: 1.5164@588nm | Most popular and low cost
Visible and near IR spectrum applications |
| 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. |
| Sapphire | Transmission Range: 180-4500nm
Refractive Index: 1.755@1000nm
Strong Hardness | Best choice for scratch resistance applications Thinner optics Wide
Transmission Range |
| Calcium Fluoride | Transmission Range: 170-7800nm
Refractive Index: 1.399@5000nm
Little Hygroscopic Susceptibility
High Thermal Expansion Coefficient: 18.85 x 10-6K | IR laser applications |
| MgF2 | Transmission Range: 120-7000nm
Refractive Index: 1.376@700nm | UV laser applications |
2.specification
sapphire Windows general specifications
Diameter: 0.2-300mm or customization
Diameter tolerance : +/-0.1mm or +/-0.02mm
Thickness : 0.10-100mm
Thickness tolerance: ± 0.1mm or +/-0.02mm
Surface quality (scratch & dig) 60/40, 40/20 or better
Surface accuracy : λ/4, λ/2, λ
Clear Aperture : >85%, >90%
Parallelism : +/-3' ,+/-30''
Bevel : 0.1~0.3mm×45 degree
coating AR, BBAR or upon customer request( UV, VIS, IR)
applications
Applications
- For LED substrate application (2-8inch wafer)
Sapphire wafer and substrate applications include:
- Microelectronic IC applications - SOS Silicon-on-Sapphire
- Growth of superconducting compounds / Gallium Nitride - Infrared
detectors
- Hybrid microelectronics - Polishing carriers
Sapphire optical lens Aapplications points:(customized shape)
-Hostile environment
-Optical transmission from ultraviolet to near infrared
-High temperature
-Radiation resistance sapphire bearing
-sapphire ball for measuring equipment.
3. Our products
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: What's your MOQ and Delivery Time ?
A: (1) For inventory, the MOQ is 10pcs. if 25pcs it's better in
10days.
(2) For customized products, the MOQ is 25pcs up in 2-4weeks.
About our package ＆ delivery
Packaging products → PET film in cleaning room
Inner packing → Foam plastics anti-vibration cushion liner for
package
Outer packing → five layers corrugated carton paper box or as
required
Shipping by air → UPS , DHL , Fedex , TNT, EMS ,SF ,etc
