论文部分内容阅读
一个电替代型有源腔型辐射计己研制完成。其锥型接收器工作在2～4K,测量辐射通量的动态范围为20nW～100uW,不确定度为±1%(20)。这是一个宽带绝对探测器,在可见尤到长波红外辐射范围内有较平的吸收系数>99%。此系统是在多种方案的热模拟和实验测试基础上设计出来的。辐射计在美国国家标准与技术研究所(以下简称NIST)的低温,低背景红外辐射标定容器中村低温黑体源,探测器和尤学元件进行了浏试。它的时间常数,响应度和非等值误差被测定。这些数据与设计指标一致。用这个辐射计和工业标准光电二极管QED-200测量辐值稳定的He-Ne激光的辐射功率,其结果是一致的,其比值在75～100uW范围内为1.004,不确定度为0.5% (30)。
An electric alternative active cavity radiometer has been developed. The cone receiver operates at 2 ~ 4K and the dynamic range of the measured radiant flux is 20nW ~ 100uW with an uncertainty of ± 1% (20). This is a broadband absolute detector with a flatter absorption coefficient> 99% over a range of visible to long-wave infrared radiations. The system is designed on the basis of a variety of thermal simulation and experimental tests. The radiometer was tested on low-temperature, low-background infrared radiation calibration containers in the United States National Institute of Standards and Technology (NIST) for low temperature blackbody sources, detectors and special components in the village. Its time constant, responsivity and non-equivalent error were determined. These data are in line with design specifications. Using this radiometer and industry standard photodiode QED-200 to measure the radiated power of a radiation-stabilized He-Ne laser, the results were consistent with a ratio of 1.004 in the 75-100uW range and an uncertainty of 0.5% (30 ).