Hyperspectral imaging system

Abstract

The invention discloses a hyperspectral imaging system, and the system comprises a spectral scanning driving assembly; a metasurface lens and a CMOS detector, wherein the metasurface lens and the CMOSdetector are sequentially arranged in the incident light direction, the central points of the metasurface lens and the CMOS detector are located on the optical axis, and the position of the CMOS detector is fixed; and the spectrum scanning driving assembly is connected with the two ends of the metasurface lens. According to the invention, the axial dispersion of incident light is achieved throughthe metasurface lens; due to the fact that the sub-wavelength microstructure of the metasurface lens has efficient regulation and control capacity and achieves imaging in a scanning mode, the diffraction limit imaging function of all spectrum channels can be achieved at the same time; compared with a real-time snapshot type system, the system is simple in data processing, and is high in spatial resolution. Besides, due to the fact that the structure position of the CMOS detector is fixed, the metasurface lens is axially moved through the portable spectrum scanning driving assembly, axial scanning and coaxial imaging of all spectrum components can be achieved, and the imaging quality and the spectral linearity of the system are remarkably improved.

Description

technical field [0001] The invention belongs to the field of hyperspectral imaging and micro-nano photonics, and more specifically relates to a hyperspectral imaging system. Background technique [0002] Hyperspectral imaging technology is one of the hot research directions in the field of imaging optics in recent years. This technology is widely used in cultural relics protection, criminal investigation, product sorting, precision agriculture, environmental monitoring, remote sensing mapping, aerospace and other fields. [0003] The commonly used hyperspectral imaging technology mainly realizes the acquisition of spectral information through dispersive or interferometric optical systems. Among them, the dispersive hyperspectral imaging technology inevitably introduces a slit structure, the system structure is complex, and the luminous flux and signal-to-noise ratio are low; The interferometric spectral imaging technology requires high adjustment accuracy. At the same time, ...

AI Technical Summary

Problems solved by technology

[0013] Aiming at the above defects or improvement needs of the prior art, the present invention provides a hyperspectral imaging system, the purpose of which is to solve the technical problem of poor imaging quality caused by the off-axis structure in the prior art

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