Frame type single-grating double-path dispersion hyperspectral imaging system and method

Abstract

The invention belongs to the technical field of spectral imaging, and particularly relates to a hyperspectral imaging system and method. The invention discloses a frame type single-grating double-path dispersion hyperspectral imaging system, which comprises a first dispersion unit, a second dispersion unit, a slit and an area-array camera, the slit is located between the first dispersion unit and the second dispersion unit. The first dispersion unit and the second dispersion unit share one dispersion element. According to the invention, based on a frame-type dispersion hyperspectral imaging mechanism model of dispersion subtraction, frame-type dispersion hyperspectral imaging detection is realized by adopting a dispersion subtraction technology, image stitching and splicing are not needed, and spectral images with high spatial resolution and high spectral resolution of a deep sea scene can be obtained and detected. Direct imaging of a deep-sea target scene is realized, image deformation is eliminated, the image information quality is improved, and the high-spectral resolution is reserved.

Description

technical field [0001] The invention belongs to the technical field of spectral imaging, in particular to a hyperspectral imaging system and method. Background technique [0002] Hyperspectral imaging technology is the combination of imaging technology and spectral technology. It can obtain the one-dimensional spectral information of the target on the basis of obtaining the two-dimensional image information of the target, which can reflect the appearance image and physical and chemical characteristics of the observed object, so as to achieve the target Target detection and identification. Through graphic image information and spectral "fingerprint" effect, material identification and component analysis can be carried out, and it has gradually become a popular "tool" in the fields of aerospace remote sensing, geological and mineral exploration, and astronomical observation. [0003] With the emergence and development of underwater hyperspectral imaging technology, new requir...

AI Technical Summary

Problems solved by technology

The existing dispersive hyperspectral imaging technology cannot perform real-time spectral imaging of underwater target scenes due to the use of pre-slits and space-segmented detection methods, and requires additional auxiliary alignment and focusing equipment, and the stitched spectral images are easy to generate images Deformation and banding noise, resulting in insufficient image information and insufficient spatial resolution

Although the hyperspectral imaging technology using the modulation filter principle can directly image underwater targets and observe them in real time, the higher the spectral resolution, the more complex the modulation system, and the light energy utilization rate is not high.

Due to the spectral absorption characteristics of seawater, interferometric hyperspectral imaging technology is not suitable for deep-sea environments; and the system cost is high, the requirements for the working environment are high, and the spectral reconstruction algorithm is complex

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