真空低温环境下超大面源黑体现场校准技术

红外辐射面源黑体应用于特定红外特性目标的模拟，各种红外探测、制导系统的外场测试。随着空间应用的红外成像器的口径的增大，红外辐射面源的口径也相应增大，为了保证超大辐射面黑体的性能指标满足要求，必须对其在真空低温条件下进行性能校准。但目前国内还没有相应计量标准，无法保证测试结果的准确可靠。设计了一种真空低温环境下超大面源黑体现场校准装置，实现对超大面源黑体的发射率、辐射温度、温场均匀性、温度稳定性等性能参数的校准，并取得了较好的试验结果，实现了真空低温环境下超大面源黑体的参数校准。

Field calibration technologies for extra-large radiation area blackbody in vacuum cryogenic environment

Infrared extra-large radiation area blackbody was used to simulate certain infrared characteristic target, widely used in different infrared detection, controlling and guiding equipment's field test. With the aperture of the IR imager used in space becoming larger, the area of the area blackbody was also becoming larger. Extra-large radiation area blackbody must be calibrated in vacuum cryogenic environment, for its performances satisfy the need of test. But there is still no measurement standard at home, it can not guarantee the accuracy and reliability of test results. A calibration device for infrared extra-large radiation area blackbody was presented in this paper, the calibration for emissivity, radiation temperature, uniformity of temperature field and stability of radiation temperature was realized, and good results were achieved. The calibration of infrared extra-large radiation area blackbody in vacuum cryogenic environment was realized by this device.