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Alkor Technologies - one of the largest Russian manufacturers of sapphire windows and sapphire lenses.
We offer custom sapphire windows and sapphire lenses at very competitive price, delivery within 3-4 weeks. Please send us your sapphire optics specifications, we will quote it for you within 24 hrs.
We have more than 20 years experience in sapphire optics. We offer square sapphire windows, rectangular sapphire windows at very competitive price. Sapphire windows from Alkor works in air and gas analyzers, xenon lamps, vacuum chamber view ports, optical sensors, light pipes and medical devices all over the world.
Alkor manufactures sapphire microoptics (diameter 1-3mm) and large size optical sapphire windows up to 180mm (7 inch +) diameter. Sapphire windows and lenses with AR coating are available upon request.
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Special offer: Sapphire windows from stock.
| # |
Item |
Specifications |
Price |
| 1 |
Sapphire window |
Diameter 6.0 (-0.2)mm; thickness 0.20 (+/-0.05)mm; S/D: 80/50 |
Ask for quote |
Sapphire transmission. Thickness of window 10mm.
Sapphire (Al2O3) is used for windows, prisms and lenses in 190-4000nm wavelength range. Sapphire windows exhibits the unique capability of having a broad transmission range and high optical transmission: from the vacuum ultraviolet to the infrared spectrum. It is recognized as a highly important optical material because sapphire combines high transmission with outstanding mechanical-strength properties at high and low temperatures.
Sapphire windows are widely used as protective windows. Sapphire windows are ideal for applications where high pressure, vacuum, or corrosive atmospheres are a consideration.
| Transmission Range |
0.17 to 5.5 μm |
| Refractive Index |
No 1.75449; Ne 1.74663 at 1.06 μm (1) |
| Reflection Loss |
14% at 1.06 μm |
| Absorption Coefficient |
0.3 x 10-3 cm-1 at 2.4 μm (2) |
| Reststrahlen Peak |
13.5 μm |
| dn/dT |
13.1 x 10-6 at 0.546 μm (3) |
| dn/dμ = 0 |
1.5 μm |
| Density |
3.97 g/cc |
| Melting Point |
2040°C |
| Thermal Conductivity |
27.21 W m-1 K-1 at 300K |
| Thermal Expansion |
5.6 (para) & 5.0 (perp) x 10-6/K * |
| Hardness |
Knoop 2000 with 2000g indenter |
| Specific Heat Capacity |
763 J Kg-1 K-1 at 293K (4) |
| Dielectric Constant |
11.5 (para) 9.4 (perp) at 1MHz |
| Youngs Modulus (E) |
335 GPa |
| Shear Modulus (G) |
148.1 GPa |
| Bulk Modulus (K) |
240 GPa |
| Elastic Coefficients |
C11=496 C12=164 C13=115 C33=498 C44=148 |
| Apparent Elastic Limit |
300 MPa (45,000 psi) |
| Poisson Ratio |
0.25 |
| Solubility |
98 x 10-6 g/100g water |
| Molecular Weight |
101.96 |
| Class/Structure |
Trigonal (hex), R3c |
No = Ordinary RayNe = Extraordinary Ray
Wavelength, μm |
No |
Ne |
0.193 |
1.92879 |
1.91743 |
0.213 |
1.88903 |
1.87839 |
0.222 |
1.8754 |
1.86504 |
0.226 |
1.87017 |
1.85991 |
0.244 |
1.85059 |
1.84075 |
0.248 |
1.84696 |
1.83719 |
0.257 |
1.83932 |
1.82972 |
0.266 |
1.83304 |
1.82358 |
0.280 |
1.82437 |
1.81509 |
0.308 |
1.81096 |
1.80198 |
0.325 |
1.80467 |
1.79582 |
0.337 |
1.80082 |
1.79206 |
0.351 |
1.79693 |
1.78825 |
0.355 |
1.79598 |
1.78732 |
0.442 |
1.78038 |
1.77206 |
0.458 |
1.77843 |
1.77015 |
0.488 |
1.7753 |
1.76711 |
0.515 |
1.77304 |
1.76486 |
0.532 |
1.7717 |
1.76355 |
0.590 |
1.76804 |
1.75996 |
0.633 |
1.7659 |
1.75787 |
0.670 |
1.76433 |
1.75632 |
0.694 |
1.76341 |
1.75542 |
0.755 |
1.76141 |
1.75346 |
0.780 |
1.76068 |
1.75274 |
0.800 |
1.76013 |
1.7522 |
0.820 |
1.75961 |
1.75168 |
0.980 |
1.75607 |
1.81974 |
1.064 |
1.75449 |
1.74663 |
1.320 |
1.75009 |
1.74227 |
1.550 |
1.74618 |
1.73838 |
2.010 |
1.73748 |
1.72973 |
2.249 |
1.73232 |
1.72432 |
2.703 |
1.719 |
1.711 |
2.941 |
1.712 |
1.704 |
3.333 |
1.701 |
1.693 |
3.704 |
1.687 |
1.679 |
4.000 |
1.674 |
1.666 |
4.348 |
1.658 |
1.65 |
4.762 |
1.636 |
1.628 |
5.000 |
1.623 |
1.615 |
5.263 |
1.607 |
1.599 |
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