Shortwave-infrared-extended image intensifier technology and its application
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摘要: 对传统的微光像增强器与向短波红外延伸的InGaAs光阴极像增强器进行了比较，分析了通过调节组分而使响应波段覆盖夜天光辐射主要波段的InGaAs材料特性，揭示了以InGaAs半导体材料为光阴极的像增强器将在夜间具有更高的量子效率和响应度。介绍了InGaAs器件技术的国内外研究现状，InGaAs光阴极微光器件在短波红外波段的辐射响应是传统像增强器的100~1 000倍，InGaAs全固态探测器可在0.4 m~1.7 m宽光谱成像，在0.9 m~1.7 m范围的量子效率大于80%，表明该器件在激光探测、远距离定位与跟踪、情报侦察、夜间辅助驾驶等方面可以获得广泛应用。Abstract: Traditional low-light-level(LLL) image intensifier and the image intensifier with InGaAs photocathode extending to shortwave infrared(SWIR) band were compared and analyzed,and the materiel characteristic of InGaAs was analyzed of which the response band could cover the main band of the night sky radiation through adjusting the component of InGaAs. It is revealed that the image intensifier with InGaAs photocathode has higher quantum efficiency and responsivity. The researching status home and abroad was presented. The response of InGaAs photocathode image intensifier is 100~1 000 times larger than the traditional image intensifier at shortwave infrared hand and the InGaAs detector can work between 0.4 m~1.7 m, the quantum efficiency is more than 80% between 0.9 m~1.7 m. It is indicated that this kind of image intensifier can be applied in laser detection, orientation at far distance, intelligence reconnaissance and assistant driving at night.
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Keywords:
- night vision /
- SWIR /
- InGaAs /
- photocathode /
- LLL image intensifier
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