Publisher DOI: 10.3390/s19122833
Title: Improving Optical Measurements : Non-Linearity Compensation of Compact Charge-Coupled Device (CCD) Spectrometers
Language: English
Authors: Nehir, Münevver 
Frank, Carsten  
Aßmann, Steffen 
Achterberg, Eric P. 
Keywords: Charge-coupled device; Compact spectrometer; Non-linearity correction; Optical measurements; Spectrometer errors
Issue Date: 25-Jun-2019
Publisher: MDPI
Journal or Series Name: Sensors 
Volume: 19
Issue: 12
Abstract: 
Charge-coupled device (CCD) spectrometers are widely used as detectors in analytical laboratory instruments and as sensors for in situ optical measurements. However, as the applications become more complex, the physical and electronic limits of the CCD spectrometers may restrict their applicability. The errors due to dark currents, temperature variations, and blooming can be readily corrected. However, a correction for uncertainty of integration time and wavelength calibration is typically lacking in most devices, and detector non-linearity may distort the signal by up to 5% for some measurements. Here, we propose a simple correction method to compensate for non-linearity errors in optical measurements where compact CCD spectrometers are used. The results indicate that the error due to the non-linearity of a spectrometer can be reduced from several hundred counts to about 40 counts if the proposed correction function is applied.
URI: http://hdl.handle.net/20.500.12738/5011
ISSN: 1424-8220
Review status: This version was peer reviewed (peer review)
Institute: Department Umwelttechnik 
Fakultät Life Sciences 
Forschungs- und Transferzentrum Applied Life Science Technologies and Environmental Research 
Type: Article
Additional note: article number: 2833
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