Multi-Spectral Imaging Windows
Multi-spectral imaging windows provide high transmission, excellent wavefront quality, low scatter, and exceptional environmental durability. These windows can be customized from virtually any substrate material, including fused silica, Si, Ge, ZnSe, ZnS, CaF2, MgF2, Cleartran and AMTIR.
Excelitas has a world-renowned capability for optical fabrication and polishing an extensive range of materials and geometries to the industry’s highest level of performance and quality. Utilizing a range of processes including spindle polishing, CNC polishing, diamond turning and continuous polishing, Excelitas has the expertise to meet your most challenging imaging window needs.
Typical Optically Coated Component Performance:
Germanium
| Wavelength | Avg. T | Avg.R | Abs.T | Abs.R |
| 8.0-12.0 μm | ≥97% | ≤0.5% | ≥93% | ≤1% |
| 7.5-13.5 μm | ≥96% | ≤1% | ≥85% | ≤4% |
Silicon
| Wavelength | Avg. T | Avg. R | Abs. T | Abs. R |
| 3.0-5.0 μm | ≥98% | ≤0.5% | ≥94% | ≤1.5% |
ZnSe
| Wavelength | Avg. T | Avg. R | Abs. T | Abs. R |
| 8.0-12.0 μm | ≥98% | ≤0.5% | ≥96% | ≤1% |
| 7.5-13.5 μm | ≥97% | ≤0.5% | ≥93% | ≤1.5% |
| 2.0-13.0 μm | ≥93% | ≤2.5% | ≥83% | ≤5.0% |
| 7.5-14.0 μm | ≥92% | ≤2.5% | ≥80% | ≤6.0% |
Sizes up to 330mm
Typical Environmental Tests
| Typical Environmental Tests | |
| Adhesion MIL-C-48497A para. 4.5.3.1 | Tape Test |
| Humidity MIL-C-48497A para. 4.5.3.2 | 24hrs. 49 deg. C 95-100% relative humidity |
| Abrasion MIL-C-48497A para. 4.5.3.3 | Moderate, 50 strokes with cheesecloth |
Typical Optically Coated Component Performance:
Germanium
| Wavelength | Avg. T | Avg.R | Abs.T | Abs.R |
| 8.0-12.0 μm | ≥97% | ≤0.5% | ≥93% | ≤1% |
| 7.5-13.5 μm | ≥96% | ≤1% | ≥85% | ≤4% |
Silicon
| Wavelength | Avg. T | Avg. R | Abs. T | Abs. R |
| 3.0-5.0 μm | ≥98% | ≤0.5% | ≥94% | ≤1.5% |
ZnSe
| Wavelength | Avg. T | Avg. R | Abs. T | Abs. R |
| 8.0-12.0 μm | ≥98% | ≤0.5% | ≥96% | ≤1% |
| 7.5-13.5 μm | ≥97% | ≤0.5% | ≥93% | ≤1.5% |
| 2.0-13.0 μm | ≥93% | ≤2.5% | ≥83% | ≤5.0% |
| 7.5-14.0 μm | ≥92% | ≤2.5% | ≥80% | ≤6.0% |
Sizes up to 330mm
Typical Environmental Tests
| Typical Environmental Tests | |
| Adhesion MIL-C-48497A para. 4.5.3.1 | Tape Test |
| Humidity MIL-C-48497A para. 4.5.3.2 | 24hrs. 49 deg. C 95-100% relative humidity |
| Abrasion MIL-C-48497A para. 4.5.3.3 | Moderate, 50 strokes with cheesecloth |