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Bidirectional interferogram cooperative using method of time modulation type Fourier transform spectrometer

A Fourier transform and time modulation technology, which is used in interference spectroscopy, spectrum investigation and other directions to achieve the effect of eliminating the influence of differences, wide application prospects and easy implementation.

Active Publication Date: 2017-10-20
SHANGHAI SATELLITE ENG INST
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Problems solved by technology

For the collaborative use of two-way interferograms of time-modulated Fourier transform spectrometers, there is no ready-made method to deal with them

Method used

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  • Bidirectional interferogram cooperative using method of time modulation type Fourier transform spectrometer
  • Bidirectional interferogram cooperative using method of time modulation type Fourier transform spectrometer
  • Bidirectional interferogram cooperative using method of time modulation type Fourier transform spectrometer

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Embodiment Construction

[0016] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

[0017] The brief introduction of theoretical analysis basis of the present invention is as follows: for the time-modulated Fourier transform spectrometer, in the process of reciprocating operation of the interferometer, the two-way (forward and reverse) interferograms are acquired successively, and the time difference is very small, so The instrument state of the spectrometer itself can be considered unchanged, and the zero optical path difference position point of the two-way interferogram should correspond to the same position. In fact, due to the influence of the sampling direction, sampling position, and zero optical path difference offset corresponding to the two-way interferogram, the two-way interferogram may not be able to collect the zero optical path difference position, and the...

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Abstract

The invention discloses a bidirectional interferogram cooperative using method of a time modulation type Fourier transform spectrometer. The method comprises the following steps of 1, reversing a backward interferogram sequence; 2, performing three times of batten interpolation on a forward interferogram sequence and the interferogram sequence after reversing of the backward interferogram sequence; 3, respectively searching absolute value maximal value corresponding position of the two sets of sequences after interpolation, and shifting the backward interferogram after reversing and interpolation; and 4, performing sampling and interception on the backward interferogram which is processed according to the previous three steps, and performing interception processing on the original frontward interferogram. The bidirectional interferogram cooperative using method has advantages of reasonable process, simple application, and effective application for cooperative use of the bidirectional interferogram of the time modulation type Fourier transform spectrometer.

Description

technical field [0001] The invention relates to a method for the coordinated use of two-way interferograms, in particular to a method for the coordinated use of two-way interferograms of a time-modulated Fourier transform spectrometer. Background technique [0002] The time-modulated Fourier transform spectrometer is a common spectrometer, which has the advantages of high throughput, high signal-to-noise ratio, and wide spectral range. It has important applications in the fields of industrial detection and material composition analysis. The time-modulated Fourier transform spectrometer uses the Michelson interferometer or its modified form to interfere and modulate the incident light, and uses the detector to realize the quantized output. Through the spectral transformation of the directly output interferogram, the required the spectral data. During the reciprocating operation of the interferometer, two kinds of interferograms, forward and reverse, can be generated. Due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/45
CPCG01J3/45
Inventor 郭玲玲赵其昌马文佳杨勇吴泽鹏李叶飞杨春燕于淼
Owner SHANGHAI SATELLITE ENG INST
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