Energy feedback hyperspectral imaging device based on acousto-optic tunable filter

Abstract

The invention belongs to the technical field of hyperspectral imaging, particularly relates to an energy feedback type hyperspectral imaging device based on an acousto-optic tunable filter, and aims to solve the problem of weak imaging quality or diffraction spectrum intensity of an existing hyperspectral imaging device. The technical scheme of the invention is as follows: the reflected, transmitted or radiated light of a measured target is collimated by a first light beam collimation system; the collimated light beam passes through a polarizing prism and then is coupled into a 2*1 optical fiber coupler by a first optical fiber coupling head, and the incident light from the 2*1 optical fiber coupler is collimated by a second light beam collimation system and then enters an acousto-optic tunable filter to generate acousto-optic interaction with high-frequency ultrasonic waves from a radio frequency driver; the diffracted light obtained after acousto-optic interaction is received by thedetector, 0-level transmission light is focused into the second optical fiber coupling head through a focusing lens and enters the 2*1 optical fiber coupler to continue to participate in acousto-opticinteraction of the acousto-optic tunable filter, so energy loss is reduced, the intensity of the diffracted light is increased, and the diffraction efficiency of the system is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of hyperspectral imaging, and relates to a single crystal filter hyperspectral imaging system based on an acousto-optic tunable filter, in particular to an energy feedback hyperspectral imaging device based on an acousto-optic tunable filter. Background technique [0002] The germination and rise of hyperspectral imaging detection technology has made a qualitative leap in the ability of human beings to study things of interest in depth. Hyperspectral imaging detection technology is a new generation of optical detection technology developed in the 1980s. It takes the spectral analysis theory of objects as the core and integrates optical system design, object imaging technology, photoelectric detectors, signal processing and information mining and Spectral information transmission theory and other technologies. After nearly 30 years of rapid development, hyperspectral imaging technology has become a distincti...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of weak imaging quality or diffraction spectrum intensity on the detector due to the low diffraction efficiency of the acousto-optic tunable filter in the weak light environment of the existing hyperspectral imaging device, and proposes an acousto-optic tunable The energy feedback type hyperspectral imaging device of the filter can improve the diffraction efficiency of the system by compensating the energy of the incident light

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