Method for calibrating wavelength of ultraviolet spectrograph

• Main Authors: HAN SHUNLI, NIE JIANHUA, JU JUNWEI, ZHANG ZHIHUI
• Format: Patent
• Language: English
• Published: 06.01.2016
• Subjects: COLORIMETRY; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; PHYSICS; RADIATION PYROMETRY; TESTING

The invention discloses a method for calibrating wavelength of an ultraviolet spectrograph. The method includes the steps of: (1) starting the ultraviolet spectrograph and a main control computer; (2) starting a standard light source, and preheating for a set time; (3) performing ultraviolet spectral signal acquisition and processing by the main control computer: (3.1) obtaining dark noise of a linear array CCD detector of the ultraviolet spectrograph; (3.2) collecting the ultraviolet spectral signals, and deducting the dark noise obtained in the Step (3.1); (3.3) utilizing a narrow window difference method to perform characteristic spectrum positioning; (3.4) replacing different types of standard light sources; repeating the Step (2) and Steps (3.1) to (3.3) to obtain a peak value position of a characteristic spectrum peak; (3.5) according to the peak value position obtained in the Step (3.4), utilizing a sectional fitting method to perform spectral curve fitting; (3.6) performing reconstruction on the fitted spectral curve; and completing the whole calibration process. The method for calibrating the wavelength of the ultraviolet spectrograph is easy and convenient to operate, has a strong anti-interference capability, and is high in calibration precision.