The Study of Spectral Correction Algorithm of Charge-Coupled Device Array Spectrometer

The charge-coupled device (CCD) array spectrometer is used for quick and simultaneous measurement of light spectrum. In scientific research and industrial application, the spectral correction algorithm is important to obtain the accurate values of photometry and chromaticity. The accuracy of spectrum depends on the correction of wavelength position, the linearity correction of CCD, the elimination of noise and dark current, the bandpass correction, the stray light correction, and the correction of frequency response. Many correction algorithms are studied to improve the CCD array spectrometer measurement. In this paper, we review and compare the correction algorithms from the past literature. Furthermore, we integrate them and find out an optimal algorithm to process the correction of spectrum measurement. The best results of luminous flux correction (ΔY) and chromatic correction (Δu'v') provide decreasing the difference of reference standard about 90%. The optimal correction algorithm provides a convenient method to enhance the measurement quality of CCD array spectrometer without changing the design of physical hardware.