The application of PbGeTe in deposition of low temperature long wavelength IR filters
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Citation
张麟 (Zhang Lin), 张素英 (Zhang Su-ying). PbGeTe材料在长波红外低温滤光片镀制中的应用 [The application of PbGeTe in deposition of low temperature long wavelength IR filters]. 光学仪器 (OPTICAL INSTRUMENTS), 2004, 26(2): 191-193.
Keywords
- PbGeTe材料 / PbGeTe material
- 长波红外 / Long-wave infrared
- 低温 / Low temperature
- 滤光片 / Filter
- 中心间隔层 / Middle space layer
- 低温漂移 / Low temperature shift
- 透过率 / Transmittance
- 膜层附着度 / Film adhesion
- ZnSe
- 消光系数 / Extinction coefficient
- 角度效应 / Angle effect
- 半宽度 / Half width
- 三半波结构膜系 / Three half-wave structure film system
- 真空镀膜设备 / Vacuum coating equipment
- 傅里叶红外分光光度计 / Fourier transform infrared spectrophotometer
Brief
The article discusses the use of PbGeTe material as a central spacer layer in long-wave infrared low-temperature filters to improve low-temperature optical performance and film adhesion compared to filters using only PbTe.
Summary
This article explores the use of PbGeTe material as the central spacer layer in long-wave infrared low-temperature filters as a solution to the problems encountered with traditional PbTe-based filters, such as low-temperature center wavelength drift and reduced transmittance, as well as poor film adhesion. By using PbGeTe specifically as the middle space layer due to its properties, the researchers were able to fabricate a 10.8μm filter with improved optical performance at low temperatures and stronger film adhesion compared to filters using PbTe as the central spacer layer. The study concludes that while PbGeTe shows promise, further research is needed to fully eliminate temperature-related issues.
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