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Method for eliminating atmosphere turbulence by utilizing random grating based compressed sensing broadband hyper-spectral imaging system

A hyperspectral imaging and atmospheric turbulence technology, applied in the field of eliminating atmospheric turbulence, can solve the problems of complex functions, high cost, and difficult manufacturing of adaptive optics systems, and achieve the effect of low system complexity and low cost

Active Publication Date: 2017-07-18
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

However, the adaptive optics system is difficult to manufacture, expensive and complex in function

Method used

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  • Method for eliminating atmosphere turbulence by utilizing random grating based compressed sensing broadband hyper-spectral imaging system
  • Method for eliminating atmosphere turbulence by utilizing random grating based compressed sensing broadband hyper-spectral imaging system
  • Method for eliminating atmosphere turbulence by utilizing random grating based compressed sensing broadband hyper-spectral imaging system

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Embodiment Construction

[0050] Combine below figure 2 To illustrate how the present invention eliminates atmospheric turbulence by using a compressed sensing broadband hyperspectral imaging system based on random gratings.

[0051] Such as figure 2 As shown, first use the patent "Acquisition Method of Measurement Matrix of Compressed Spectral Imaging System" (Patent No.: ZL201410161282.3) to pre-calibrate the measurement matrix A of the compressed sensing broadband hyperspectral imaging system based on random grating GISC ; Receive sampled data Y affected by atmospheric turbulence using a stochastic grating-based compressed sensing broadband hyperspectral imaging system.

[0052] According to the statistical theory of turbulence developed by Kolmogrov and Obukhov, the optical transfer function of atmospheric turbulence under long exposure time is established as

[0053]

[0054] where f is the focal length of the lens, λ is the wavelength, is the atmospheric turbulence structure constant, an...

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Abstract

The invention provides a method for eliminating atmosphere turbulence by utilizing a random grating based compressed sensing broadband hyper-spectral imaging system. The method includes steps of acquiring a measurement matrix and sampling data of the random grating based compressed sensing broadband hyper-spectral imaging system; generating an atmosphere turbulence transmission matrix; generating a general measurement matrix; reconfiguring a multi-spectral image; judging whether the multi-spectral image meets multi-spectral features or not; modifying the atmosphere turbulence transmission matrix; generating a general measurement matrix; reconfiguring a multi-spectral image; judging whether the multi-spectral image meets multi-spectral features or not; and acquiring an image of which the atmosphere turbulence influence is eliminated. According to the invention, by utilizing a characteristic of high acquiring efficiency for broadband spectrum image information in single-process exposure of the random grating based compressed sensing broadband hyper-spectral imaging system and by utilizing a characteristic of different response of atmosphere turbulence in different spectrums at the same time, influence of the atmosphere is eliminated.

Description

technical field [0001] The invention relates to a method for eliminating atmospheric turbulence, in particular to a method for eliminating atmospheric turbulence by using a compressed sensing wide-band hyperspectral imaging system based on random gratings. Background technique [0002] Atmospheric turbulence is a phenomenon of random vortex motion, and its components show randomness in time and space. Among them, the amplitude fluctuation caused by atmospheric turbulence leads to flickering of light intensity, increases the noise in the signal, and reduces the signal-to-noise ratio; the phase fluctuation caused by atmospheric turbulence will seriously destroy the time-space coherence of light waves, resulting in dispersion and jitter of image points. Therefore, how to eliminate the influence of atmospheric turbulence is an urgent problem in the field of atmospheric imaging technology. [0003] For this reason, since the 1950s and 1960s, a series of imaging technologies have...

Claims

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Application Information

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IPC IPC(8): G01J3/28G01J3/02
CPCG01J3/0297G01J3/2823
Inventor 韩申生刘震涛刘盛盈吴建荣李恩荣谭诗语沈夏童智申
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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