Wide-range wide-spectrum long-wave infrared hyperspectral imaging system based on linear array detector

Abstract

The invention discloses a wide-range wide-spectrum long-wave infrared hyperspectral imaging system based on a linear array detector. The system moves and scans up and down through a slit in the direction perpendicular to the slit, and a compensation swing mirror synchronously rotates and scans, so that different-spectrum-wavelength image surfaces of the same target sequentially move up and down according to the wavelengths at a focal plane, and the linear array detector obtains information of all wavelength spectrum channels in a time-sharing mode. According to the system, the long-wave infrared hyperspectral wide-range imaging technology is achieved through the linear array infrared detector, so that the range of the system is not limited by the specification of an area array detector, the synergistic effect of the slit and a scanning swing mirror is used ingeniously, the problem that the linear array detector obtains dozens of wave bands in a whole long-wave infrared wave band on thespectrum imaging surface to obtain more feature information of the target is solved, and the long-wave infrared wide-spectrum wide-range imaging technology is achieved. The system is simple in structure, low in weight, low in power consumption and capable of being applied to ground, on-board or satellite-borne ground wide-range wide-spectrum hyperspectral imaging systems.

Description

technical field [0001] The invention relates to optical components and systems, in particular to a hyperspectral imager. Specifically, it refers to a wide-width and wide-spectrum long-wave infrared hyperspectral imaging system and its imaging method based on line array detectors used in airborne or space-borne ground observation imagers. Background technique [0002] Hyperspectral imaging technology is a remote sensing technology developed in the 1980s. Different from traditional spectrometers, hyperspectral imaging technology integrates image and spectrum (integration of map and spectrum). Simultaneously acquire the continuous and fine spectral information of the target while simultaneously obtaining three-dimensional space image information, which greatly improves the detection ability of space remote sensing. Compared with visible, near-infrared, and short-wave infrared, long-wave infrared hyperspectral imaging technology has unique advantages. The spectral coverage reac...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to solve the problem that the traditional push-broom long-wave infrared hyperspectral imager cannot realize wide-width and wide-spectrum imaging, break through the technical method of the traditional hyperspectral imager based on the area array detector, and cleverly use the up and down movement of the slit Scanning and compensating pendulum mirrors perform synchronous rotation compensation, so that the image planes of different spectral wavelengths of the same target move up and down in the order of wavelength at the focal plane position, so that the linear detector can obtain information of all wavelength spectral channels in time-sharing

Images