Abstract
| Original language | English |
|---|---|
| Article number | 3077 |
| Pages (from-to) | 3077-3086 |
| Number of pages | 10 |
| Journal | Applied Optics |
| Volume | 56 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 10 Apr 2017 |
| MoE publication type | A1 Journal article-refereed |
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Nonlinearity characterization of array spectroradiometers for the solar UV measurements. / Pulli, Tomi; Nevas, Saulius; El Gawhary, Omar; van den Berg, Steven; Askola, Janne; Kärhä, Petri; Manoocheri, Farshid; Ikonen, Erkki.
In: Applied Optics, Vol. 56, No. 11, 3077, 10.04.2017, p. 3077-3086.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Nonlinearity characterization of array spectroradiometers for the solar UV measurements
AU - Pulli, Tomi
AU - Nevas, Saulius
AU - El Gawhary, Omar
AU - van den Berg, Steven
AU - Askola, Janne
AU - Kärhä, Petri
AU - Manoocheri, Farshid
AU - Ikonen, Erkki
PY - 2017/4/10
Y1 - 2017/4/10
N2 - Array spectroradiometers are attractive alternatives to scanning spectroradiometers in solar ultraviolet measurements. However, the measurement of solar spectral irradiance imposes stringent requirements for the linearity of the instruments. In this article, two array spectroradiometers were characterized for nonlinearity. Significant nonlinearities, in excess of 10%, as a function of analog-to-digital converter counts were discovered. Additional nonlinearities as a function of integration time were observed at very long integration times. No clear residual nonlinearity as a function of spectral irradiance was witnessed despite the characterization spanning four orders of magnitude of spectral irradiance. The characterizations were carried out with three measurement setups that are briefly compared.
AB - Array spectroradiometers are attractive alternatives to scanning spectroradiometers in solar ultraviolet measurements. However, the measurement of solar spectral irradiance imposes stringent requirements for the linearity of the instruments. In this article, two array spectroradiometers were characterized for nonlinearity. Significant nonlinearities, in excess of 10%, as a function of analog-to-digital converter counts were discovered. Additional nonlinearities as a function of integration time were observed at very long integration times. No clear residual nonlinearity as a function of spectral irradiance was witnessed despite the characterization spanning four orders of magnitude of spectral irradiance. The characterizations were carried out with three measurement setups that are briefly compared.
UR - http://www.scopus.com/inward/record.url?scp=85017439472&partnerID=8YFLogxK
U2 - 10.1364/AO.56.003077
DO - 10.1364/AO.56.003077
M3 - Article
VL - 56
SP - 3077
EP - 3086
JO - Applied Optics
JF - Applied Optics
SN - 1559-128X
IS - 11
M1 - 3077
ER -