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Compressed sensing-based dynamic double-arm multichannel staring spectral imaging system

A technology of compressed sensing and spectral imaging, applied in the field of spectral imaging, can solve the problems of low single-channel signal-to-noise ratio, insufficient compactness of the system, large volume and weight, etc., and achieve the effect of compact system structure, favorable storage, and reduced data volume

Pending Publication Date: 2019-12-31
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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[0011] In order to solve the technical problems of existing dual-band spectral imaging technology, such as large volume and weight, insufficient system compactness, low single-channel signal-to-noise ratio, and large data volume, the present invention provides a dynamic dual-arm multi-channel staring spectrum based on compressed sensing imaging system

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[0030] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] The main content of compressed sensing theory is: for any sparse signal, non-adaptive and linear global observation can be performed on the signal through the observation matrix, and a small number of observation values ​​can be obtained, and the observation data can be reconstructed through the compressed sensing algorithm. The compressed sensing theory mainly includes three parts: the sparse representation of the signal, the design of the observation matrix, and the reconstruction algorithm for signal restoration. Applying it to the imaging field can realize the recoding and compression of existing information, which can greatly reduce the amount of data. In addition, in the process of data compression sampling, the detector can respond to multiple channels, thereby improving the system detection. sensitivity a...

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Abstract

The invention provides a compressed sensing-based dynamic double-arm multichannel staring spectral imaging system. With the system adopted, the problems of large size, large weight, incompactness, lowsingle-channel signal-to-noise ratio and large data volume of an existing double-waveband spectral imaging technology can be solved. The system comprises an objective lens, a digital micro-mirror array, a first subsystem, a second subsystem and a data processing unit; a target light beam is imaged at a primary image plane position through the objective lens; the digital micro-mirror array is usedfor encoding the primarily-imaged image; the digital micro-mirror array is overturned according to a randomly-generated encoding matrix; when the micro-mirrors of the digital micro-mirror array are overturned by +12 degrees, the light beam enters the first subsystem; when the micro-mirrors are turned over by -12 degrees, the light beam enters the second subsystem; each of the first subsystem andthe second subsystem comprises a lens group and a detector, wherein the lens group comprises a collimating lens, a dispersion element and an imaging lens which are arranged in sequence; the detectorsof the two subsystems are area array or linear array detectors with different wave bands; and the data processing unit decodes signals received by the detectors.

Description

technical field [0001] The invention belongs to spectral imaging technology, in particular to a dynamic dual-arm multi-channel staring spectral imaging system based on compressed sensing. Background technique [0002] Compared with traditional imaging technology, hyperspectral imaging technology can obtain the spatial image and spectral information of the observed target at the same time, and spectral information is called the "fingerprint" of the material, which can be used in the research of various aspects such as material composition and content. Spectral imaging technology is widely used in many fields such as remote sensing mapping, target monitoring, atmospheric environment detection, astronomical observation, and production analysis of industrial and agricultural products. [0003] With the development of spectral imaging technology, its wavelength range has gradually expanded from visible light to infrared and even terahertz bands. However, existing detectors can on...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/27
CPCG01N21/27
Inventor 严强强胡炳樑魏儒义王爽刘文龙魏文鹏
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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