Double Side Polished Sapphire Windows For Fingerprint Recognition Applications

Al2O3 sapphire glass lens for window ,sapphire led substrates . optical glass lens by sapphire,sapphie crystal glass

1. 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.

Property  Specification
Thickness                     0.5-50mm
Size tolerance                0.005mm
Edge Finish             Ground and beveled
Surface Quality        commen 40-20 scratch-dig
Surface Flatness         the best λ/4 @ 633 nm
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

Our company provide the sapphire single crystal wafers by KY method,we can supply sapphire ingot(2inch,4inch,6inch,8inch),sapphire wafer(single/double side polishing),sapphire block,

all kinds of sapphire optical window(applied to optical equipment,industry camera,cell phone watches

and other special optical components),if you have any requirements,please contact us,

looking forward to your cooperation.

Sapphire applications:

1. LED substrate     2.mobile cover glass appliations

3.wrist watch and other consumer electronics cover glass

4.fingerprint recognition applications 

5.Military applications

6. laser matrix ＆ optical element applications

7.sapphire seed for crystal grow

8.artifical jewelry

9.mecanical parts bearing applications

10.sapphire ball for detecting instrument

2.Commen  Size For Sapphire Lens 

Materials: 99.999％ sapphire optical grade ,no bubble ,color and crystal boundar.

size:dia0.5~dia300mm

size:Dia10x0.5mmt(pictures sample size)

Orientation:C(0001)±1°,(A,R, M,C ok)

Tolerance:±0.03mm(the best on ±0.01mm)

surface: double side poshlied (1sp also ok)

Ra:＜0.5nm              (commen ＜0.3nm)

SD:40/20 ,60/40          ( commen 40/20)

Flatnees: 1/2 Lambda(or 1/4,1‘~2’, is ok)

specification for led substrates

3. Our products  

other shape and size which we can provide

We  also supply professional  other semiconductor wafers aslike below