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低噪声红外辐射计设计

Journal of Applied Optics(2013)

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Abstract
为解决热像仪测试设备校准问题,设计了内部参考黑体温度与环境温度相等的红外辐射计。为评估精密红外辐射计的性能指标,指导精密红外辐射计的设计,建立了红外辐射计NETD(噪声等效温差,Noise equivalent temperature difference)数学模型。估算了在不同电子带宽、光谱波段下红外辐射计的NETD。结果表明,当噪声带宽小于1Hz时,红外辐射计自身的NETD在MWIR(mid-wavelength infrared)、LWIR(long wavelength infrared)波段均小于0.01℃,能够满足热像仪测试设备校准需要。
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Key words
radiant temperature,blackbody,infrared imager,NETD,infrared radiometer
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