Optical readout uncooled infrared imaging detector using knife-edge filter operation

An optical readout uncooled infrared （IR） imaging detector of bimaterial cantilever array using knife-edge filter operation （KEFO） is demonstrated. The angle change of each cantilever in a focal plane array （FPA） can be simultaneously detected with a resolution of 10.5 degree. A deformation magnifying substrate-free micro-cantilever unit with multi-fold interval metaUized legs is specially designed and modeled. A FPA with 160×160 pixels is fabricated and thermal images with noise equivalent temperature difference （NETD） of 400 mK are obtained by this imaging detector.

气体浓度检测光学技术的研究现状和发展趋势

综述了近些年来国内外痕量气体浓度检测技术研究的最新进展。首先对传统的非光学气体浓度检测技术作出了简单的介绍,包括超声波技术、气敏法、热催化法、气相色谱法、干涉法应用技术,被动检气管法,然后重点阐述了基于光谱学分析气体浓度检测技术的最新发展动态,其中分别对差分吸收光谱技术(DOAS)、傅里叶变换红外光谱技术(FTIR)、可调谐激光二极管激光吸收光谱技术(TDLAS)、差分吸收激光雷达(DIAL)和拉曼散射激光雷达、激光诱导荧光光谱技术、激光光声光谱技术进行了详细介绍,最后提出了现代气体浓度检测技术的发展方向。