Double filter energy feedback hyperspectral imaging device based on acousto-optic modulation

Abstract

The invention belongs to the technical field of hyperspectral imaging, particularly relates to a double-filtering energy feedback type hyperspectral imaging device based on acousto-optic modulation, and aims to solve the problem of weak imaging quality or diffraction spectrum intensity of an existing hyperspectral imaging device. 0-level transmission light emitted by the imaging device from a first acousto-optic tunable filter is transmitted to a second 2*1 optical fiber coupler; diffracted light emitted from the first acousto-optic tunable filter enters a second acousto-optic tunable filter to generate acousto-optic interaction with high-frequency ultrasonic waves generated by the second radio frequency driver; diffracted light emitted from the second acousto-optic tunable filter passes through a rear imaging lens group and then is received by a detector; 0-level transmission light emitted from the second acousto-optic tunable filter is modulated by a liquid crystal phase variable delayer and then enters the second 2*1 optical fiber coupler; the two beams of 0-level transmission light are combined through the second 2*1 optical fiber coupler and then transmitted to a first 2*1 optical fiber coupler through the optical fiber, and the two beams of 0-level transmission light and incident light of the light source together pass through the light beam collimation system to generateacousto-optic interaction again.

Description

technical field [0001] The invention belongs to the technical field of hyperspectral imaging, and relates to a hyperspectral imaging technology based on an acousto-optic tunable filter, in particular to a dual-filter energy feedback hyperspectral imaging device based on acousto-optic modulation. Background technique [0002] The germination and rise of spectral imaging remote sensing detection technology has made a qualitative leap in the ability of human beings to study things of interest in depth. After more than 20 years of rapid development, spectral imaging remote sensing detection technology has formed a distinctive modern discipline. As people's ability to understand things in nature continues to improve, higher and higher requirements are placed on the detection accuracy of the spatial resolution and spectral resolution of remote sensing detection technology, which in turn leads to various detectors driven by technology. The ability to distinguish is also gradually ...

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 spectral imaging device, and proposes an acousto-optic modulation based Double filter energy feedback hyperspectral imaging device

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