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Asynchronous acquisition method based on Fourier transform spectrometer and Fourier transform spectrometer

A technology of Fourier transform and asynchronous acquisition, applied in the field of data processing, can solve problems such as avoiding crosstalk, and achieve the effect of avoiding signal crosstalk

Pending Publication Date: 2022-05-06
浙江微翰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the problem that the spectrometer in the prior art does not avoid the crosstalk problem from the root, and introduces new error factors during signal separation processing, and provides an asynchronous acquisition method based on a Fourier transform spectrometer and a Fourier transform spectrometer

Method used

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  • Asynchronous acquisition method based on Fourier transform spectrometer and Fourier transform spectrometer
  • Asynchronous acquisition method based on Fourier transform spectrometer and Fourier transform spectrometer
  • Asynchronous acquisition method based on Fourier transform spectrometer and Fourier transform spectrometer

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Embodiment 1

[0060] An asynchronous acquisition method based on a Fourier transform spectrometer, including a broadband light source and a laser light source, the methods include:

[0061] At the same time, the laser interference and the broadband optical interference signal of the standard are collected, and the spectrum is formed by Fourier transform, and the collected broadband optical interference is the first broadband optical interference W 0 , the collected laser interference is L 0 , calibrated synchronously and undergo Fourier transform to form spectrum F 0 ;

[0062] Turn off the laser light source, and collect the broadband optical interference signal of the standard object, wherein the collected broadband optical interference is the second broadband optical interference W 1 ;

[0063] Laser interference adjustment, the laser interference adjustment is performed through the synchronous variability between broadband light interference and laser interference, so as to obtain th...

Embodiment 2

[0074] On the basis of embodiment 1, this embodiment also includes calibration correction of broadband light:

[0075] use L 0 The adjusted L 1 Calibration for broadband light.

Embodiment 3

[0077] On the basis of the above embodiments, the difference between this embodiment and Embodiment 1 is that the laser interference adjustment method includes:

[0078] The first step is to calibrate the optical path such as laser interference and the first broadband optical interference W 1 ;

[0079] In the second step, the calibrated second broadband light interference W 1 Perform Fourier transform to obtain spectrum F 1 ;

[0080] The third step is to calculate the spectrum F 0 and spectrum F 1 The difference value D between the half-height center wavelength positions of the peaks;

[0081] The fourth step is to judge the difference value. When the difference value D is positive, gradually increase the value of the adjustment amount K with the set step size, and adjust the value of L 0 The time-domain subscript of the zero-crossing point is expanded by K times to obtain L 1 ; When the difference value is negative, gradually increase the value of the adjustment amou...

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Abstract

The invention relates to a data processing technology, and discloses an asynchronous acquisition method based on a Fourier transform spectrometer and the Fourier transform spectrometer, and the method comprises the following steps: synchronous acquisition: simultaneously acquiring a laser light source and a broadband light source, forming a spectrum through Fourier transform, and synchronously recovering the spectrum F0; a broadband light source is independently collected, a laser light source is turned off, broadband light source collection and laser interference adjustment are carried out, laser interference adjustment is carried out through synchronous variability between broadband light interference and laser interference, and therefore laser interference L1 matched with broadband light interference W1 is obtained. According to the invention, broadband light and laser used for marking adopt an asynchronous acquisition mode to acquire two paths of signals at different time, so that signal crosstalk is avoided from the source. After asynchronous acquisition, the key is that the laser interference signal is adjusted by utilizing the synchronous variability between the coaxial optical path broadband light interference signal and the laser interference signal, so that the laser interference signal can be matched with broadband light, and accurate calibration and Fourier transform are carried out.

Description

technical field [0001] The invention relates to data processing technology, in particular to an asynchronous collection method based on a Fourier transform spectrometer and a Fourier transform spectrometer. Background technique [0002] Spectral technology is widely used in the field of material detection due to its fast detection speed and non-destructive characteristics, and the miniaturization and low cost of spectrometers can greatly promote the popularization and promotion of spectral technology applications, so MEMS-based micro Fourier To convert the spectrometer, the spectrometer needs to calibrate the collected interference signal carrying the material information with a laser or other optical path to form an accurate spectrum. In the whole system, the laser and the broadband light with material information need to pass through the same interferometer, and the two interact to cause crosstalk in the optical path. The miniaturized spectrometer will also cause crosstalk...

Claims

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Application Information

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IPC IPC(8): G01N21/25
CPCG01N21/25G01N21/255
Inventor 赵瑞凡薛原凌明韩中旭
Owner 浙江微翰科技有限公司
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