Specifications:
| Substrate Materials | Germanium, Silicon | Dimensions | Customized |
| Thickness/Diameter Tolerance | +/-0.05mm | Surface Quality | 80/50 S/D |
| Parallelism | < 1 arc minute | Clear Aperture | >90% |
| Chamfer | <0.2x45degree | Coating | custom IR coating |
| Metallization Materials | Au, Ag, or Cu (upon customer's request) |
Shanghai North Optics provides the following types of packaging windows:
| Filtering Specifications of Packaging Windows | |
| AR coating on Ge substrate | T>94%@7-12μm |
| AR coating on Si substrate | T>88%@8-12μm |
| Long pass filtering coating on Ge substrate | T<1%@<7μm, Tavg>92%@8-12.5μm |
| Bandpass filtering coating on Ge substrate | T<1%@<7.5μm, Tavg >90%@8-12μm T<1%@12.5μm |
| Broadband AR coating on Ge substrate | Tavg>92%@2-14μm |
Packaging windows are critical components for the FPA detectors in thermal imaging cameras, the central apertures of these packaging windows serve as infrared filters and transmit the IR radiation in selection. The metallic coatings around the edges of windows allow welding and packaging, Germanium (Ge) and Silicon (Si) are often used as the substrate materials. High-quality metallic coatings are wrapped on the edge of the windows, and several kinds of filtering coatings are available: broadband AR coating, longpass filtering coating, and bandpass filtering. Custom windows are available upon your request.
Curves:
1. Transmission of Ge Windows with AR@7-14 Micro
2. Transmission of Si Windows with AR@8-12 Micro
3.Transmission of Ge Windows with Band-pass Filtering Coating
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