Multi-dimension complex calibrating method of fiber optic spectrometer

Abstract

The invention discloses a multi-dimension complex calibrating method of a fiber optic spectrometer. The calibrating method comprises the steps of multi-dimension wavelength calibration and multi-dimension amplitude calibration, wherein multi-dimension calibration is executed to the wavelength and the amplitude by introducing temperature factors so that stability of the spectrometer is increased at high and low temperature; in the calibrating method, various operating factors of CCD (Charge Coupled Device) are fully considered, and multi-dimension complex calibration is executed to the fiber optic spectrometer in combination with multiple dimensional calibration factors of space, time, temperature and light intensity to ensure reliability of test results.

Description

technical field [0001] The invention relates to the field of fiber optic spectrometers, in particular to a multi-dimensional complex calibration method for fiber optic spectrometers. Background technique [0002] In the fiber optic spectrometer, a fixed grating structure is used, and a linear array CCD is used as a detector in the spectral imaging spectrum. On the one hand, due to the limitation of the size of the CCD photosensitive element itself and the distribution error of the spectral band on the photosensitive surface, it is difficult to calibrate the wavelength on the CCD, which limits the improvement of the positioning accuracy of the spectral line on the CCD. Therefore, it is necessary to Calibration is carried out at wavelengths lateral to the spectral curve. On the other hand, due to the correlation between the diffraction grating, the quantum efficiency of the array CCD detector and the packaging material, etc. To accurately reflect the intensity distribution c...

AI Technical Summary

Problems solved by technology

On the one hand, due to the limitation of the size of the CCD photosensitive element itself and the distribution error of the spectral band on the photosensitive surface, it is difficult to calibrate the wavelength on the CCD, which limits the improvement of the positioning accuracy of the spectral line on the CCD. Therefore, it is necessary to Calibration of wavelengths lateral to the spectral curve

On the other hand, due to the correlation between the diffraction grating, the quantum efficiency of the array CCD detector, the packaging material, etc. To accurately reflect the intensity distribution characteristics of the optical signals of each wavelength irradiated on the photosensitive element, the vertical amplitude of the spectral curve must be calibrated

[0003] The existing calibration methods are all carried out at room temperature. After calibration, the wavelength accuracy and amplitude accuracy of the instrument are obviously affected by temperature changes, and the adaptability to temperature is very poor.

[0004] Moreover, the calibration of fiber optic spectrometers in the prior art is usually fixed incident light intensity and fixed integration time, which cannot solve the problems of gain nonlinearity and light intensity nonlinearity

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