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A passive, fully-staring THz video camera based on kinetic inductance bolometer arrays
IEEE Transactions on Terahertz Science and Technology ( IF 3.9 ) Pub Date : 2021-01-01 , DOI: 10.1109/tthz.2020.3029949
Juho Luomahaara , Hannu Sipola , Leif Gronberg , Aki Mayra , Mika Aikio , Andrey Timofeev , Kirsi Tappura , Anssi Rautiainen , Aleksi Tamminen , Visa Vesterinen , Mikko Leivo , Feng Gao , Hannu Vasama , Arttu Luukanen , Juha Hassel

Current state-of-the-art security video cameras operating in the THz regime employ up to a few hundred detectors together with optomechanical scanning to cover an adequate field-of-view for practical concealed object detection. As a downside, the scanning reduces the integration time per pixel compromising sensitivity, increases the complexity, and reduces the reliability of the system. In contrast to this, we demonstrate a video camera, for the first time, basing its operation on the concept of a fully staring 2-D detector array with a single detector element responsible for a single imaged pixel. The imaging system is built around the detector technology of kinetic inductance bolometers, allowing the operation in the intermediate temperature range $>$5 K and the scale-up of the detector count into multikilo-pixel arrays and beyond. The system is designed for a field-of-view of 2 × 1 m$^2$ and an imaging distance of 2.5 m. We describe the main components of the system and show images from concealed object experiments performed at a near-video rate of 9 Hz.

中文翻译:

基于动态电感辐射热计阵列的无源全凝太赫兹摄像机

当前在太赫兹范围内运行的最先进的安全摄像机采用多达数百个探测器以及光机械扫描,以覆盖足够的视场以进行实际的隐藏物体检测。不利的一面是,扫描会减少每个像素的积分时间,从而影响灵敏度、增加复杂性并降低系统的可靠性。与此相反,我们首次展示了摄像机,其操作基于完全注视 2-D 探测器阵列的概念,其中单个探测器元件负责单个成像像素。该成像系统围绕动态电感测辐射热计的探测器技术构建,允许在 $>$5 K 的中间温度范围内运行,并将探测器数量按比例放大到数千像素阵列及更多。该系统设计用于 2 × 1 m$^2$ 的视场和 2.5 m 的成像距离。我们描述了系统的主要组件,并显示了以 9 Hz 的近视频速率执行的隐藏物体实验的图像。
更新日期:2021-01-01
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