Abstract. For spectroradiometers the characterisation of their wavelength scale and spectral bandwidth underpins substantially the quality of measured data. This characterisation can be performed using metrology-grade tuneable monochromatic sources, which are currently available only in a few laboratories world-wide. Yet in numerous applications only the in-field calibration is a feasible solution. We have designed and developed a Tuneable and Portable radiation Source (TuPS) in the wavelength range from 300 nm to 350 nm for the in-field characterization of Dobson and Brewer spectrometers wavelength scale and slit-function with uncertainties better than 0.02 nm in wavelength and with the bandwidth of emitted radiation smaller than 0.1 nm FWHM. The TuPS is designed such that only minor modifications of its optical system extends/shifts its spectral range towards visible and near-infrared spectral regions and thus expand its application for characterisation of any spectroradiometers in the relevant spectral region of interest.

中文翻译：

---

用于现场光谱仪表征的可调谐便携式辐射源的设计与开发

摘要。对于光谱辐射计，其波长范围和光谱带宽的表征在很大程度上支撑了测量数据的质量。可以使用计量级可调谐单色源执行此表征，目前仅在世界范围内的少数实验室中可用。然而，在众多应用中，只有现场校准才是可行的解决方案。我们已经设计和开发了波长范围在300 nm至350 nm之间的可调和便携式辐射源（TuPS），用于Dobson和Brewer光谱仪的波长范围和狭缝功能的现场表征，其不确定度优于0.02 nm。发射辐射的带宽小于0.1 nm FWHM。