Diffraction-based imaging spectrometer and high spatial resolution spectral imaging method

Abstract

The invention discloses an imaging spectrometer based on diffraction effect and a high spatial resolution spectral imaging method; the imaging spectrometer includes a front-end device, a diffraction device, a collimation device, an array detection chip, a control device, and a data calculation and analysis system; The spectrometer controls the filter device through the control device. The intensity of diffracted light detected by the same pixel element under different control conditions is different from each other, and is substituted into the matrix equation to calculate the spectrum; more control parameters can be output through the control device to achieve a higher spectrum. Resolution; due to the large number of pixels on the array detection chip, by dividing the target to be measured, each pixel can be used as a separate detector to perform spectral imaging measurements on different sub-unit areas of the imaging area to be measured , so the spatial resolution of spectral imaging is higher; compared with traditional imaging spectrometers, the imaging spectrometer disclosed in the present invention has smaller volume, lower cost and higher performance.

Description

technical field [0001] The invention relates to an imaging spectrometer and a spectral imaging method for obtaining rich information of spatial dimension and spectral dimension, which can be used in the technical field of remote sensing and imaging with high spatial resolution and high spectral resolution. Background technique [0002] The main function of the imaging spectrometer is to obtain almost continuous spectral data of each pixel while acquiring a large number of narrow-band continuous spectral images of the target, so a data cube composed of two-dimensional spatial information and one-dimensional spectral information of the measured target can be obtained. At present, imaging spectrometers are mainly used in hyperspectral aerial remote sensing, and are also widely used in physical evidence inspection, military, biomedicine, security testing and other fields. [0003] The portable small imaging spectrometer modularizes each unit of the original instrument, adjusts i...

AI Technical Summary

Problems solved by technology

However, the existing commercial imaging spectrometers only focus on improving the spectral resolution, but their spatial resolution is low (tens or even hundreds of meters), so it is necessary to develop an imaging spectrometer with both higher spatial and spectral resolutions.

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