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Method for correcting wavelength drift of array type spectrometer based on combination of optical switch and mercury lamp

A wavelength drift and spectrometer technology, which is applied in the field of wavelength drift correction of array spectrometers using optical switches combined with mercury lamps, can solve problems affecting the accuracy of the instrument, save use costs and labor costs, eliminate wavelength drift and migration, and improve accuracy high effect

Inactive Publication Date: 2016-08-10
GUANGXI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

However, due to the change of ambient temperature and the heat converted by the electrification of the array spectrometer components, the position of the array spectrometer and the array components will be slightly deformed, and the actual position of the photosensitive point deviates from the pre-calibrated x-axis, which is manifested as wavelength migration and drift of the output spectrum. , thus affecting the accuracy of the instrument

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  • Method for correcting wavelength drift of array type spectrometer based on combination of optical switch and mercury lamp

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Embodiment 1

[0030] A method for correcting the wavelength drift of an array spectrometer by using an optical switch combined with a mercury lamp, the method is to select the emission spectrum of the mercury lamp as the determined spectrum, perform real-time x-axis calibration, output the real-time calibration result to a computer as the x-axis, and set the array spectrometer The serial output of the series is used as the y-axis, and the spectrum is synthesized to eliminate the wavelength shift and drift caused by pre-calibration.

[0031] The method includes the following steps:

[0032] A1. Connect each component in the optical path system, set the measurement cycle and calibration cycle; the optical path system includes a light source 1, a sample 2, an optical switch 3, a mercury lamp 4, a controller 5, an array spectrometer 6, and a computer 7 ;

[0033] A2. In the measurement period, the light L1 emitted by the light source 1 illuminates the sample 2 and emits the light L2 through th...

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Abstract

The invention provides a method for correcting the wavelength drift of an array type spectrometer based on the combination of an optical switch and a mercury lamp, and relates to a method for correcting the wavelength drift in the optical field. The method comprises the following steps of selecting an emission spectrum of a mercury lamp as a determined spectrum, conducting the real-time X-axis calibration, outputting the real-time calibration result to a computer as the X-axis, and adopting the series output of the array type spectrometer as the Y-axis to synthesize a spectrogram. According to the technical scheme of the invention, the wavelength migration and the wavelength drift, caused by environmental factors and the factors of an instrument, during the pre-calibration process can be eliminated. Therefore, the accuracy of the instrument is improved and the requirement of high-precision measurement can be met. Moreover, the difference between instruments can be eliminated, and the model migration difficulty is lowered. In addition, the periodic manual calibration is not required, so that both the usage cost and the labor cost are saved.

Description

technical field [0001] The invention relates to a method for correcting wavelength drift in the optical field, in particular to a method for correcting wavelength drift of an array spectrometer by using an optical switch combined with a mercury lamp. Background technique [0002] The array spectrometer (that is, the array photosensitive spectrometer) collects the multi-wavelength responses of CCD, CMOS or PDA and other components through array photosensitive, and realizes the rapid collection of spectra. It has the advantages of small size, compact structure, anti-vibration, and high-speed signal acquisition. The working principle of the current array photosensitive spectrometer is: the incident light is projected onto the array photosensitive element after being split by the spectroscopic element, and the response value of each photosensitive point is output as the photometric value of the spectrum, that is, the y-axis of the spectrogram; each photosensitive point The wavel...

Claims

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Application Information

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IPC IPC(8): G01J3/28G01J3/02G01N21/25
CPCG01J3/2803G01J3/0297G01N21/25
Inventor 粟晖姚志湘
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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