E-mail: marketing@krasgermanium.com
Material: Germanium for IR optics.
Form of product:
- cylindrical (rods, plano blanks, windows);
- rectangular (blanks, windows)
- other (spherical generated blanks, with elements of aspheric).
Package: Termal package (vacuum sealing), then put into a wooden case or cartoon box.
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Index of refraction |
4.0048±0.0002 at 10.6 μm at 25ºC | ||||||||||||
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Inhomogeneity of the index of refraction |
≤ 2·10-4 | ||||||||||||
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Temperature coefficient of the index of refraction |
≤ 4·10-4 | ||||||||||||
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Absorption coefficient, cm-1 |
0.03 см-1 max on λ= 10.6 μm under t=25ºC | ||||||||||||
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Transmission |
46% min at 4 μm, 45% min at 10.6 μm trough polished uncoated blank of 10 mm thickness | ||||||||||||
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Crystalline form |
Monocrystalline; polycrystalline |
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Purity |
≥ 99.999% |
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Resistivity, Ohm•cm |
1÷5; 5÷40 |
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Orientation |
[111] ± 2º; [100] ± 2º |
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Conductivity Type |
N |
| parameter | sizes | tolerances |
| Diameter, mm |
10÷100 mm 100÷200 mm 200÷400 mm |
0.05 mm 0.1 mm 0.2 mm |
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Maximum diameter sizes, mm: monocrystalline polycrystalline |
320 mm 440 mm |
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| Thickness, sag, length and width, mm |
10÷100 100÷200 200÷400 |
0.05 0.1 0.15 |
| Chamfer | 0.1÷0.8 | ±0.1 for diameter < 100mm |
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Surface finish, Ra, μm
Generated blanks Plano blanks |
≤ 1.5; ≤ 1.0; ≤ 0.5 μm ≤ 2.0; ≤ 1.5; ≤ 1.0 μm |
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| Edge chips, mm | < 0.5 mm | |
| ETV, mm |
10÷100 100÷200 200÷400 |
0.03 0.05 0.1 |
Note:
Special requirements, tighter tolerances, other remarks, which are not included into above specification upon request.
