Combining high transmission, low reflection and moderate environmental resistance, this coating is best suited for internal surfaces applications. Umicore can successfully apply High Efficiency Anti-Reflective Coatings (HEAR) to germanium, silicon, zinc selenide and GASIRĀ® substrates.
Specifications
| HEAR Product ID | UCS_Ge_01 Rev 7.0 |
UCS_Ge_05 Rev 1.0 |
UCS_Si_01 Rev 2.0 |
UCS_ZAR_03 Rev 2.0 |
UCS_GASIR1_01 Rev 2.0 |
UCS_GASIR5_01 Rev 7.0 |
| Substrate | Germanium | Germanium | Silicon | Zinc Selenide | GasirĀ®1 | GasirĀ®5 |
| Waveband | 8-12Āµm | 3-5Āµm | 3-5Āµm | 8-12Āµm | 8-12Āµm | 8-12Āµm |
| Transmission AverageĀ (thru both sides) |
ā„98% 8Āµm-12Āµm ā„95% 8Āµm-14Āµm |
ā„98% 3Āµm-5Āµm | ā„98% 3Āµm-5Āµm | ā„98% 8Āµm-12Āµm | ā„97% 8Āµm-12Āµm ā„95% 8Āµm-14Āµm |
ā„97% 8Āµm-12Āµm ā„95% 8Āµm-14Āµm |
| Reflection AverageĀ (per surface) |
ā¤0.5% 8Āµm-12Āµm ā¤1.0% 8Āµm-14Āµm |
ā¤1.0% 3Āµm-5Āµm | ā¤1.0% 3Āµm-5Āµm | ā¤0.5% 8Āµm-12Āµm | ā¤1.0% 8Āµm-12Āµm ā¤1.5% 8Āµm-14Āµm |
ā¤1.0% 8Āµm-12Āµm ā¤1.5% 8Āµm-14Āµm |
| Angle of Incidence | 0Ā°-20Ā° | 0Ā°-20Ā° | 0Ā°-20Ā° | 0Ā°-20Ā° | 0Ā°-20Ā° | 0Ā°-20Ā° |
HEAR Coating Environmental Durability Testing:
- Adhesion: MIL-C-48497A (4.5.3.1)
- Humidity: MIL-C-48497A (4.5.3.2)
- Moderate Abrasion: MIL-C-48497A (4.5.3.3)
Image on the right: example spectral scan of an HEAR 8-12Āµm Coating on Germanium