High Efficiency Anti-Reflective (HEAR) Coatings
Combining high transmission, low reflection and moderate environmental resistance, this coating is best suited for internal surfaces applications. Umicore can successfully apply HEAR coatings to Germanium, Silicon, Zinc Selenide, and Gasir® substrates.
Below is a table showing the typical specification of Umicore’s HEAR coatings.
Contact us to discuss your specific substrate and spectral requirements.
| 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 | Gasir®1 | Gasir®5 |
| Waveband | 8-12µm | 3-5µm | 3-5µm | 8-12µm | 8-12µm | 8-12µm |
| Transmission Average (thru both sides) |
≥98% 8µm-12µm ≥95% 8µm-14µm |
≥98% 3µm-5µm | ≥98% 3µm-5µm | ≥98% 8µm-12µm | ≥97% 8µm-12µm ≥95% 8µm-14µm |
≥97% 8µm-12µm ≥95% 8µm-14µm |
| Reflection Average (per surface) |
≤0.5% 8µm-12µm ≤1.0% 8µm-14µm |
≤1.0% 3µm-5µm | ≤1.0% 3µm-5µm | ≤0.5% 8µm-12µm | ≤1.0% 8µm-12µm ≤1.5% 8µm-14µm |
≤1.0% 8µm-12µm ≤1.5% 8µm-14µm |
| Angle of Incidence | 0°-20° | 0°-20° | 0°-20° | 0°-20° | 0°-20° | 0°-20° |
Example spectral scan of an HEAR 8-12µm Coating on Germanium
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)