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根据新光度基准,我国实现光强单位坎德拉的方法是采用一组性能稳定的电校准绝对辐射计,加上一个修正滤光器.为提高辐射计的灵敏度,完善光屏蔽和热屏蔽,获得优良的清洁环境,使用了真空低温装置.首先叙述了国家新光度基准,然后介绍了真空低温装置的特点,最后报告了测试结果.由于较理想的真空环境,使辐射计的灵敏度提高了1.5倍,光电不等效修正因子为0.9999,从而保证辐照度测量的不确定度为0.24%,整个计量过程的准确度得到了提高.
According to the new luminosity benchmark, our country to achieve light unit candela method is to use a stable performance of the electrical calibration absolute radiometer, coupled with a correction filter .In order to improve the sensitivity of the radiometer, improve the light shielding and thermal shielding, get excellent Of the environment, the use of a vacuum cryogenic device.Firstly describes the national new luminosity benchmark, and then introduced the characteristics of the vacuum cryogenic device, the final report of the test results.As the ideal vacuum environment, the radiometer sensitivity increased by 1.5 times, Photoelectric equivalent correction factor of 0.9999, so as to ensure the uncertainty of irradiance measurement was 0.24%, the accuracy of the entire measurement process has been improved.