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Method and device for correcting phase error of interferometric spectroscopic imager

A technology of interferometric imaging and phase error, applied in interferometric spectroscopy, spectrum investigation, etc., can solve problems affecting processing efficiency and achieve the effect of improving accuracy and taking into account calculation speed

Inactive Publication Date: 2017-09-26
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

The Forman method has high calculation accuracy, but multiple convolution processing will affect the processing efficiency

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  • Method and device for correcting phase error of interferometric spectroscopic imager
  • Method and device for correcting phase error of interferometric spectroscopic imager
  • Method and device for correcting phase error of interferometric spectroscopic imager

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Embodiment Construction

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] Such as figure 1 As shown, an embodiment of the present invention provides a phase error correction method for an interference spectrum imager, including:

[0025] Step 11, carry out IFFT (Inverse FastFourier Transformation, inverse Fast Fourier Transformation) to the small bilateral part of the interferogram that the interference spectrum imager acquires to obtain the phase factor, and carry out FFT (Fast Fourier Transformation, Fast Fourie...

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Abstract

The invention discloses a phase error correction method and device of an interference spectrum imager, wherein the phase error correction method of the interference spectrum imager includes performing IFFT fast Fourier inverse transformation on the small bilateral part of the interferogram obtained by the interference spectrum imager to obtain the phase factor , and performing FFT fast Fourier transform on the phase factor to obtain a symmetry function; performing convolution processing on the interferogram and the symmetry function to obtain a convolution interferogram; performing IFFT on the convolution interferogram to obtain a restored spectrum function, and perform IFFT on the small bilateral part of the convolution interferogram to obtain a phase error factor; modify the restored spectral function according to the phase error factor to obtain a target spectral function. First, the interferogram is corrected in the time domain, and then the spectral function is corrected in the frequency domain to improve the accuracy of the restored spectrum while taking into account the calculation speed.

Description

technical field [0001] The invention relates to the technical field of interference spectrum imager, in particular to a phase error correction method and device of an interference spectrum imager. Background technique [0002] Interferometric spectral imaging technology is a new type of information acquisition technology developed in the 1990s. Due to its many theoretical advantages, it has high application value and potential in many fields such as environmental monitoring and resource investigation. Under the traction and promotion of application requirements, in just over a decade, interferometric imaging technology has developed rapidly, and various forms of interferometric imagers have emerged, which have played an important role in aerospace remote sensing. . [0003] Since the interference data obtained by the interference spectrum imager is a kind of intermediate data, it cannot be directly used by the user, and the spectral data for the user must be obtained after ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/45
Inventor 景娟娟吕群波相里斌周锦松
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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