Based On The Conversion Material Shortwave Infrared Digital Imaging Assembly Design

The technology of SWIR has drawn people’s attention due to its intrinsic optical properties. Researches on these optical properties and the imaging system have been widely conducted both in China and abroad. To some extent, the technology of SWIR allows a great range of applications and potentials either in military or civil arenas.The SWIR Detector System has two different types, viz. the cooled and uncooled. Even though the cooled system is of sophisticated craftsmanship, high-power consumption and high costs, it has a good imaging quality with high-sensitive sensors. To date, domestic detector system of the cooled type is exclusively designed for military purpose. While the uncooled detector system with less sophisticated craftsmanship are mainly for civil purposes, including medical detection, environmental and traffic detection and monitor.In this research, how light is gathered by the imaging sensor is exhaustively elaborated. By referring to the counter-STOKES theory of the up-conversion material, short-waved infrared light is converted to visible light, which in turn is transmitted to the photosensitive surface of the imaging sensor through transmitting and focusing of the optical system. Design of the imaging system is discussed and a brief introduction of up-conversion material and the optical system are also presented in this paper. A set of short-waved infrared digital imaging assembly is designed based on the present up-conversion material. The feasibility of short-waved infrared imaging is thus verified by launching an array of relevant experiments.