Germanium Window
Germanium windows are polished to high precision quality. Uncoated germanium window is unstable in air and doesn't have high transmission in LWIR range. We offer high efficiency broadband anti-reflection coatings, diamond-like carbon (DLC) coating, high durability AR coating (HDAR) as well as IR bandpass filter coatings. DLC and HDAR coatings offer high hardness, corrosion resistance, wear and abrasion resistance
Germanium window usually is one side coated with high efficiency broadband anti-reflection coating and diamond-like carbon DLC coating on the outer surface. DLC coated germanium window is quite often used to protect the infrared lenses from a harsh environment.
We offer some standard germanium windows in various diameters as listed below, different heights as truncated windows also available. Some are in stock and can be shipped out right away. The custom-made germanium windows can be in circular, square, rectangular and special shapes. We can reach tight specifications on surface flatness, scratch-dig and parallelism.
| Standard Specifications | |
|---|---|
| Diameter: | 10.0mm to 300mm. Some are listed below |
| Thickness: | 1.0mm to 20.0mm |
| Clear Aperture: | > 95% central |
| AR Coating: | 8~12μm(LWIR), 3~5μm(MWIR) or 3~14μm |
| Diamond Like Carbon Coating (DLC): | offers high hardness, corrosion resistance, wear and abrasion resistance |
| Part No. | Diameter | Diameter (inch) | Thickness | Surface Quality |
|---|---|---|---|---|
| GEW0006 | 10.0 mm | 0.394″ | 1.0 mm | 40-20 |
| GEW0010 | 12.7 mm | 0.500″ | 1.0 mm | 40-20 |
| GEW0015 | 15.0 mm | 0.590″ | 1.0 mm | 40-20 |
| GEW0026 | 20.0 mm | 0.787″ | 1.0 mm | 40-20 |
| GEW0028 | 20.0 mm | 0.787″ | 2.0 mm | 40-20 |
| GEW0043 | 25.0 mm | 0.984″ | 2.0 mm | 40-20 |
| GEW0049 | 25.4 mm | 1.000″ | 1.0 mm | 60-40 |
| GEW0052 | 25.4 mm | 1.000″ | 2.0 mm | 60-40 |
| GEW0065 | 30.0 mm | 1.181″ | 2.0 mm | 60-40 |
| GEW0084 | 35.0 mm | 1.378″ | 1.5 mm | 60-40 |
| GEW0087 | 35.0 mm | 1.378″ | 3.0 mm | 60-40 |
| GEW0095 | 37.5 mm | 1.476″ | 3.0 mm | 60-40 |
| GEW0102 | 38.1 mm | 1.500″ | 1.5 mm | 60-40 |
| GEW0105 | 38.1 mm | 1.500″ | 3.0 mm | 60-40 |
| GEW0111 | 40.0 mm | 1.575″ | 3.0 mm | 60-40 |
| GEW0119 | 42.0 mm | 1.654″ | 3.0 mm | 60-40 |
| GEW0130 | 45.0 mm | 1.771″ | 2.5 mm | 60-40 |
| GEW0133 | 45.0 mm | 1.771″ | 3.0 mm | 60-40 |
| GEW0172 | 50.0 mm | 1.969″ | 3.0 mm | 60-40 |
| GEW0181 | 50.8 mm | 2.000″ | 3.0 mm | 60-40 |
| GEW0217 | 53.5 mm | 2.106″ | 3.0 mm | 60-40 |
| GEW0245 | 57.0 mm | 2.244″ | 2.5 mm | 60-40 |
| GEW0262 | 58.0 mm | 2.283″ | 3.0 mm | 60-40 |
| GEW0275 | 60.0 mm | 2.362″ | 3.0 mm | 60-40 |
| GEW0307 | 63.5 mm | 2.500″ | 3.0 mm | 60-40 |
| GEW0326 | 65.0 mm | 2.559″ | 3.0 mm | 60-40 |
| GEW0348 | 67.5 mm | 2.657″ | 3.0 mm | 60-40 |
| GEW0361 | 68.0 mm | 2.677″ | 3.0 mm | 60-40 |
| GEW0386 | 69.0 mm | 2.717″ | 5.0 mm | 60-40 |
| GEW0405 | 70.0 mm | 2.756″ | 8.0 mm | 60-40 |
| GEW0439 | 72.5 mm | 2.854″ | 3.0 mm | 60-40 |
| GEW0468 | 75.0 mm | 2.953″ | 3.0 mm | 60-40 |
| GEW0490 | 76.2 mm | 3.000″ | 3.0 mm | 60-40 |
| GEW0495 | 76.2 mm | 3.000″ | 4.0 mm | 60-40 |
| GEW0552 | 80.0 mm | 3.150″ | 3.0 mm | 60-40 |
| GEW0570 | 80.0 mm | 3.150″ | 10.0 mm | 60-40 |
| GEW0602 | 85.0 mm | 3.346″ | 3.0 mm | 60-40 |
| GEW0609 | 85.0 mm | 3.346″ | 4.0 mm | 60-40 |
| GEW0668 | 90.0 mm | 3.543″ | 3.0 mm | 60-40 |
| GEW0674 | 90.0 mm | 3.543″ | 4.0 mm | 60-40 |
| GEW0709 | 95.0 mm | 3.740″ | 3.0 mm | 60-40 |
| GEW0725 | 95.0 mm | 3.740″ | 8.0 mm | 60-40 |
| GEW0780 | 98.0 mm | 3.858″ | 4.0 mm | 60-40 |
| GEW0795 | 98.0 mm | 3.858″ | 15.0 mm | 60-40 |
| GEW0822 | 100.0 mm | 3.937″ | 3.0 mm | 60-40 |
| GEW0826 | 100.0 mm | 3.937″ | 4.0 mm | 60-40 |
| GEW0847 | 101.6 mm | 4.000″ | 4.0 mm | 60-40 |
| GEW0853 | 101.6 mm | 4.000″ | 4.5 mm | 60-40 |
| GEW0879 | 105.0 mm | 4.134″ | 4.0 mm | 60-40 |
| GEW0883 | 105.0 mm | 4.134″ | 4.5 mm | 60-40 |
| GEW0942 | 114.3 mm | 4.500″ | 4.0 mm | 80-50 |
| GEW0947 | 114.3 mm | 4.500″ | 5.0 mm | 80-50 |
| GEW1023 | 127.0 mm | 5.000″ | 4.0 mm | 80-50 |
| GEW1028 | 127.0 mm | 5.000″ | 5.0 mm | 80-50 |
| GEW1087 | 139.7 mm | 5.500″ | 5.0 mm | 80-50 |
| GEW1093 | 139.7 mm | 5.500″ | 6.0 mm | 80-50 |
| GEW1124 | 152.4 mm | 6.000″ | 6.0 mm | 80-50 |
| GEW1129 | 152.4 mm | 6.000″ | 7.0 mm | 80-50 |
| GEW1173 | 165.1 mm | 6.500″ | 6.0 mm | 80-50 |
| GEW1176 | 165.1 mm | 6.500″ | 7.0 mm | 80-50 |
| GEW1198 | 177.8 mm | 7.000″ | 7.0 mm | 80-50 |
| GEW1203 | 177.8 mm | 7.000″ | 8.0 mm | 80-50 |
| GEW1247 | 190.5 mm | 7.500″ | 8.0 mm | 80-50 |
| GEW1255 | 190.5 mm | 7.500″ | 9.0 mm | 80-50 |
| GEW1292 | 203.2 mm | 8.000″ | 8.0 mm | 80-50 |
| GEW1297 | 203.2 mm | 8.000″ | 9.0 mm | 80-50 |
| GEW1329 | 215.9 mm | 8.500″ | 8.0 mm | 80-50 |
| GEW1333 | 215.9 mm | 8.500″ | 9.0 mm | 80-50 |
| GEW1372 | 228.6 mm | 9.000″ | 9.0 mm | 80-50 |
| GEW1378 | 228.6 mm | 9.000″ | 10.0 mm | 80-50 |
| GEW1432 | 254.0 mm | 10.000″ | 10.0 mm | 80-50 |
| GEW1439 | 254.0 mm | 10.000″ | 12.0 mm | 80-50 |
| GEW1516 | 300.0 mm | 11.811″ | 12.0 mm | 80-50 |
| GEW1522 | 300.0 mm | 11.811″ | 14.0 mm | 80-50 |
