SHANGHAI FAMOUS TRADE CO.,LTD
SHANGHAI FAMOUS TRADE CO.,LTD
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Sapphire Windows Glass Lens Substrates Al2O3 Crystal Circle Round Fan Square
hardness 9.0 sapphire bearing for rolling bearing components/prolate ellipse/Plano/Round Sapphire optical glass window sector sapphire glass/ sapphire window/sapphire optical plate for vacuum equipment watch window
Sapphire without impurities is a transparent crystal with no absorption from the visible spectrum to the infrared (5μm) range. A window made of this sapphire. Sapphire crystal can be used as protective glass because its hardness is very high and it is not easy to be damaged.
Synthetic sapphire is a transparent single crystal 99.99% pure Al2O3 that exhibits a unique combination of physical, chemical, electrical, and optical properties: high thermal conductivity, high strength, and scratch resistance, hardness (9 on the Mohs scale), transparent in a wide range of wavelength, chemical inertness.
High crystal perfection, low reactivity, and appropriate unit cell size make sapphire an excellent substrate in the semiconductor industry for blue light-emitting diodes (LED).
Since Nobel Laureate in Physics Shuji Nakamura used the sapphire substrate in the 1990s for LED, the demand for sapphire crystal has been growing rapidly.
It drives development of new markets like general lighting, backside lighting in TV sets, displays, consumer appliances, aerospace and defense, and other applications
| Item # | Sapphire Windows, Uncoated | |
|---|---|---|
| Diameter | 1/2" (12.7 mm) | 1" (25.4 mm) |
| Diameter Tolerance | +0.0 / -0.2 mm | |
| Thickness | 3.0 mm | 5.0 mm |
| Thickness Tolerance | ±0.3 mm | |
| Clear Aperture | ≥Ø11.43 mm | ≥Ø22.86 mm |
| Parallelism | ≤3 arcmin | |
| Transmitted Wavefront Error | <λ/4 Over Central Ø5 mm ≤λ/2 Over Full Clear Aperture | - |
| Surface Flatness | λ Over Clear Aperture | |
| Surface Quality | 60-40 Scratch-Dig | |
| Wavelength Range | 200 nm - 4.5 μm (Uncoated) | |
| Substrate | Sapphire | |
| Transmission Data |  | |
| Available orientations: | C-axis [0001], R-axis [1-102], A-axis [11-20], M-axis [10-10], Random |
| Sapphire windows / blanks | |
| Diameter / Width: | 25.0 - 250.0 mm |
| Tolerance: | Standard ± 2°, Special to ± 0.1° |
| Thickness: | Minimum 0.15, maximum 120.0 mm |
| Surface finish: | As cut, fine ground, lapped, polished s/d 80/50, 60/40, 40/20, 20/10, 10/5, according to the MIL-0-13830A |
| Ends / Edge quality: | Fine ground, 80/50 |
| "As-grown" sapphire tubes: | |
| Dimensions | Up to 50 mm inner diameter, 0,5 - 4,0 mm wall thickness, 300-600 mm tubes length |
| Orientation | C-axis in the length of the tube |
| Polished sapphire tubes: | Up to 50 mm inside diameter, 0,5 - 3,0 mm wall thickness, 80-350 mm tubes length |
| Ingots: | Diameter/Width 5-220 mm, Thickness/Length 25 – 125 mm |
| Surface quality | As-cut, Ends/Edge Quality Diamond cut |
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