Development of visible near-infrared wavelength reference materials
In order to broaden the wavelength range of the standards,the glass doped with praseodymium and neodymium rare earth elements with stable physical and chemical properties was used as the raw material of the visible wavelength reference material.At the same time,the polystyrene sheet(thickness of 1 mm)with stable physical and chemical properties was used as the raw material of the near-infrared wavelength reference material.The visible and near-infrared wavelength reference material was developed by using the characteristics that the two did not affect each other,and the superposition of the two would expand the band range.The uniformity of the sample was tested by F test method,and the stability of the sample was investigated by linear fitting method.The traceability was solved by tracing to the national standard.The band range of standard material was determined to be 430 nm～2 550 nm,and the uncertainty was 0.1 nm～1.0 nm,which made up for the defect that the wave range coverage in the current reference material is too narrow.
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