高稳定度红外平面黑体辐射源的研制

Reserches on High Stability Infrared Planar Blackbody Radiation Source

为了满足现场复杂环境红外辐射测量设备定标的要求,研制了2套便携式高稳定度、有效辐射面为400 mm×400 mm的红外热辐射源。其中1套采用基于密闭流体控温的原理,主要工作在比环境温度低10℃的相对低温工作区,用于作为环境辐射的参考低温点;另1套采用大面积半导体制冷器(TEC)控温的原理,主要工作在比环境温度高10℃的相对高温工作区。2套红外辐射源的表面发射率均高于0.97,控温稳定性可达0.01℃/h,红外辐射源面温度面均匀性优于0.2℃。

In order to meet the requirements of infrared radiation calibration of infrared instrument in the complex environment on site,two sets of portable infrared thermal radiation sources were developed with high stability and the effective radiation surface is 400 mm×400 mm.One of them adopted the principle of temperature control based on closed fluid,and mainly worked in a relatively low temperature working area 10℃lower than the ambient temperature,which was used as a reference low temperature point for environmental radiation.The other set adopted the principle of large-area TEC temperature control,which mainly worked in a relatively high temperature working area 10℃higher than the ambient temperature.The surface emissivity of the two sets of infrared radiation sources was higher than 0.97,the temperature control stability was better than 0.01℃/h,and the surface temperature uniformity of the infrared radiation source was better than 0.2℃.