Nehir Münevver, Frank Carsten, Aßmann Steffen, Achterberg Eric P
GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstr. 1-3, 24148 Kiel, Germany.
HAW Hamburg, Faculty of Life Sciences, Ulmenliet 20, 21033 Hamburg, Germany.
Sensors (Basel). 2019 Jun 25;19(12):2833. doi: 10.3390/s19122833.
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.
电荷耦合器件（CCD）光谱仪广泛用作分析实验室仪器中的探测器以及原位光学测量的传感器。然而，随着应用变得更加复杂，CCD光谱仪的物理和电子限制可能会限制其适用性。由暗电流、温度变化和晕光引起的误差可以很容易地校正。然而，大多数设备通常缺乏对积分时间不确定性和波长校准的校正，并且对于某些测量，探测器非线性可能会使信号失真高达5%。在这里，我们提出一种简单的校正方法，以补偿使用紧凑型CCD光谱仪的光学测量中的非线性误差。结果表明，如果应用所提出的校正函数，光谱仪非线性导致的误差可以从几百计数减少到约40计数。
