Facility for spectral radiance calibration at low light level.
Opt Express
; 32(8): 14837-14846, 2024 Apr 08.
Article
em En
| MEDLINE
| ID: mdl-38859419
ABSTRACT
The spectral radiance measurement at daytime level can be realized with high accuracy, while it's difficult when the spectral radiance is at nighttime level. We design a spectral radiance calibration facility which has the characteristics of completely unchanged spectrum over 3 orders of magnitude and approximately unchanged spectrum for about 6 orders of magnitude. It combines a spectral radiance light source, a precision aperture and a white diffuser together, make it easy to reproduce the spectral radiance at 380â
nm from 4 × 10-9 W/(m2·sr·nm) to 4 × 10-3 W/(m2·sr·nm). The facility can be easily used to calibrate a spectroradiometer at nighttime level. When the spectral radiance from 380â
nm to 780â
nm is around 1 × 10-7W/(m2·sr·nm), the calibration uncertainty of the spectroradiometer is 0.87%â¼1.0% (k = 1).
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MEDLINE
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article