There are two technologies available for night-time, low-light and adverse weather conditions observation: Image Intensification and Infrared Thermal Imaging. Both have their own advantages as well as limitations.
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The special purpose of optical overlay system is to combine both technologies. It allows fully and effectively exploit their capabilities by creating “Hybrid” or so-called “Fusion” Enhanced Night Vision observation system.
It is a lightweight, portable optical-electronic hand-held or helmet-mountable solution that combines a Night Vision Device and Thermal Imaging Mini-Attachment ClipIR.