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1.Why choose the sapphire?
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 glass products are manufactured from single crystal 99.999％Al2O3, making them ideal for demanding applications (such as laser systems) because of their extreme surface hardness, high thermal conductivity, high dielectric constant and resistance to common chemical acids and alkalis. Sapphire is the second hardest crystal next to diamonds and, because of their structural strength, sapphire windows can be made much thinner than other common dielectric windows with improved transmittance. Chemically, sapphire is single crystal aluminum oxide (Al2O3), and is useful in a transmission range from 0.2 - 5.5µm.
2.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 Low Thermal Expansion UV to IR spectrum
Refractive Index: 1.4858@308nm Coefficient: 0.54 x 10-6K Best choice for thermal resistance
Sapphire
Transmission Range: 180-4500nm Strong Hardness Best choice for scratch resistance applications
Refractive Index: 1.755@1000nm Thinner optics Wide Transmission Range
Calcium Fluoride
Transmission Range: 170-7800nm Little Hygroscopic Susceptibility IR laser applications
Coefficient: 18.85 x 10-6K High Thermal Expansion
Refractive Index: 1.399@5000nm
MgF2
Transmission Range: 120-7000nm UV laser applications
Refractive Index: 1.376@700nm
3.0 sample in details
Typical specifications:
| Available orientations: | C-axis [0001], R-axis [1-102], A-axis [11-20], M-axis [10-10], Random |
| Sapphire windows / blanks | dia0.5-dia400mm, ＜400x400mm |
| Diameter / Width: | 25.0 - 250.0 mm |
| Tolerance: | Standard ± 1°, Special to ± 0.1° |
| Thickness: | Minimum 0.1, maximum 200.0 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: | outer 1-200mm |
| Dimensions | Up to 200 mm inner diameter, 0,5 - 50 mm wall thickness, 300-600 mm tubes length |
| Orientation | C-axis in the length of the tube |
| Polished sapphire tubes: | Up to 200 mm inside diameter, 0,5 - 50 mm wall thickness, 10-350 mm tubes length |
| Ingots: | Diameter/Width 5-220 mm, Thickness/Length 5 – 250 mm |
| Surface quality | As-cut, Ends/Edge Quality Diamond cut |
4.Process step of sapphire products
5.0 FAQ –
Q: What you can supply logistics and cost?
(1) We accept DHL, Fedex, TNT, UPS, EMS, SF and etc by FOB delivery.
(2) If you have your own express number, it's great.
Q: What's the delivery time?
(1) For the standard products such as ball lens, powell lens and collimator lens:
For inventory: the delivery is 5 workdays after order.
For customized products: the delivery is 2 or 3 workweeks after order.
Q: How to pay?
50％ deposit ,50％ before delivery by T/T, Paypal, West Union, MoneyGram.
Q: What's the MOQ?
(1) For inventory, the MOQ is 3pcs.
(2) For customized products, the MOQ is 10pcs-30pcs.
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High Hardness 9.0 Sapphire Optical Glass Tube 99.999％ Al2O3 Materials Images
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