紫外辐射度计量及其进展

Measurement Capability and Development of Ultraviolet Radiometry

从国家基准、副基准到工作基准,全面介绍了我国紫外(光谱)辐射度计量的现状和发展历程。1975年建立光谱辐射度国家基准装置,1988年、2002年、2011年对基准装置进行技术改造和能力提升,分析比较了不同时期、四代基准装置的测量能力。2017年,新建短波紫外光谱辐射照度国家基准装置,填补了200 nm^350 nm波段基准的空白,六只氘灯组成的副基准灯组用于基准量值的保存和传递,使我国有能力参加短波紫外光谱辐射照度国际关键比对CCPR-K1.b。在1990、2004和2015年,中国计量科学研究院NIM分别参加了三次光谱辐射照度国际比对,在紫外波段,NIM的测量结果与国际参考值的平均偏离从4.85%,0.88%减小到0.28%,国际一致性不断提升。紫外光谱辐射亮度、紫外光谱辐射照度、紫外辐射照度和紫外辐射能量获得国际等效互认的CMCs测量能力,制修订四项紫外辐射度计量领域的计量法规文件。未来紫外辐射计量的发展方向和趋势是向更低的测量不确定度和更宽的测量量程(极弱和高强)方向发展。

The development and measurement capability of the national primary standard,national secondary standard and working standard of radiometry in ultraviolet spectral range is introduced. The national primary standard were set up in 1975,and measurement capability was upgraded in 1988,2002 and 2011 respectively.Measurement uncertainties of the primary standards in different years were compared and analyzed. National primary standard apparatus of spectral irradiance covering from 200 nm to 350 nm was established in 2017,six deuterium lamps were used to maintain the scale of spectral irradiance. NIM participated 1990,2004 and 2015 international comparison of spectral irradiance. In UV wavelength,the average deviation of the measurement results of NIM and the reference values were 4. 85%,0. 88% and 0. 28% respectively. The measurement capability of spectral radiance,spectral irradiance,ultraviolet irradiance and ultraviolet radiant energy of NIM were admitted and published on the website of BIPM. Four metrological legislations of ultraviolet radiometry were approved and published recently. In the future,ultraviolet radiometry measurement will be focused on lower uncertainty,extremely weak signal and high intensity signal metrology.