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 | UCS_Ge_05 | UCS_Si_01 | UCS_ZAR_03 | UCS_GASIR1_01 | UCS_GASIR5_01 |
| 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 |
≥90% 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)