Robust Full-Screen Wavelength Calibration Algorithm

In spectrometer measurement, it is very important to accurately calibrate the wavelength of all target characteristic spectra. Although calibration methods have long been investigated, no techniques designed for scanning, double-layer, secondary diffraction, linear-array CCD spectrometer, best our knowledge. Based on grating diffraction equation and experimental results, a mathematical model was established spectrometer. this study, robust, full-screen, algorithm proposed, based related working principle requirements both accuracy robustness. The detailed steps are as follows. First, we at central pixels, following equation. Then, according relationship between difference in pixels feedback values ruler, show association these factors. Finally, combined two models built full-screen model. We theoretically experimentally demonstrate that proposed an excellent tool, which can conveniently wavelengths non-central same time.