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Alkor Technologies - manufacturer of sapphire lenses. We offer custom sapphire optical lenses at very competitive price with rapid worldwide delivery. We can make lenses from 3 to 30mm diameter with almost any focal length. Please send us your sapphire lens specifications and we will quote it for you within 24 hours.
Alkor manufactures:
- Sapphire micro-optics: sapphire lenses 2-3 mm diameter;
- Sapphire lenses (planoconvex, planoconcave, bullet lenses);
- Custom AR coating for visible or IR bands.
Sapphire is often chosen as an optical substrate when the application requires high mechanical durability and high thermal conductivity, as well as good transmission between UV, Visible, and IR regions. The tradeoff is that Sapphire is one of the most difficult materials to process and to achieve high quality optical specifications. Alkor Technologies offers custom shapes, sizes and coating specifications for our Sapphire lenses.
If you have a custom application requiring Sapphire lenses and coatings, let our technical staff provide you with the optimum, cost effective solution.
See also: Sapphire windows; Sapphire windows catalog Sapphire transmission.
| Standard Specifications |
| Material |
Optical grade single Sapphire crystal |
| Dimensions |
Min Dia 2mm - Max. Dia 30 ± 0.0/-0.1mm |
| Thickness |
± 0.10mm |
| Surfaces |
60/40 or 40/20 |
| Edges |
Fine Ground |
| Flatness |
≤5 Fringes |
| Clear Aperture Diameter |
90% |
| Centration |
3 Arc min |
Sapphire refractive index
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 |
Sapphire (Al2O3) is used for lenses in 190 nm - 5 µm wavelength range. Sapphire exhibits the unique capability of having a broad transmission range and high optical transmission: from the vacuum ultraviolet to the infrared spectrum. Sapphire is ideal for applications where high power, high pressure, vacuum, or corrosive atmospheres are a consideration.
Materials
• Sapphire
Coatings
• Anti-Reflective
• Partial Reflector
• Dielectric 193 nm - 5 µm
Features
• Environmentally Durable
• High Thermal Conductivity
• Windows Round/Rectangular
• Wedges
• Spherical Lenses
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