Institute for Single Crystals
National Academy of Sciences of Ukraine
61001, Ukraine, Kharkiv, 60 Nauky Ave., phone/fax: +38(057)340-86-19, e-mail: info@iscrystals.com
We offer
Product innovation
Materials and Products - Large-Size Sapphire Crystals
 click picture to enlarge |
Optical Round Sapphire Windows and BlanksOptical sapphire windows and blanks with diameter from 10 to 350 mm and thickness to 40 mm |
| Size, mm | Diameter to 350, thickness to 40 |
| Accuracy of preparation, mm in diameter in thickness | ±0.05 ±0.05 |
| Blocks, twins, twin layers and cracks, inclusions that are visible in polarized light | Not allowed |
| Flatness | ≤ 2-3 λ at the length 25 mm (λ=633 nm) |
| Roughness of the polished surfaces (Ra), Å | From 2 to 100 |
| Quality of the polished surfaces by MIL-0-13830A | S/D - 80/50, 60/40, 40/20, 20/10 |
| Transmission (%): visible and IR spectral region (to 4,5 μm) UV spectral region (0,2 μm) | 85-87 70 |
| Internal voltages, kg/mm2 | ≤2 |
| Crystallographic orientation |  |
Our adress:
61001, Kharkov, 60 Lenin Ave.
phone: +38(057)340-86-19,
fax: +38(057)340-86-19,
e-mail: info@iscrystals.com
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