Single-pixel imaging method and system based on terahertz free electron laser

An imaging method and imaging system technology, applied in the field of terahertz imaging, can solve the problems of complex imaging equipment, poor imaging quality, and susceptibility to noise interference, and achieve the effects of high structural similarity, good quality, and diverse structural designs

Pending Publication Date: 2022-04-15
GUANGDONG UNIV OF TECH
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Problems solved by technology

These two imaging methods have the problems of poor imaging quality,

Method used

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  • Single-pixel imaging method and system based on terahertz free electron laser
  • Single-pixel imaging method and system based on terahertz free electron laser
  • Single-pixel imaging method and system based on terahertz free electron laser

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Example Embodiment

[0057] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0058] like figure 1 As shown, a single-pixel imaging method based on terahertz free electron laser includes the following steps:

[0059] S1. Provide a single-pixel imaging system based on a terahertz free electron laser.

[0060] Specifically, step S1 further includes:

[0061] Fix the terahertz free electron laser generator, and install a chopper device, a terahertz wave beam expander, an organic crystal, and a terahertz projection lens in sequence in front of it, which is recorded as the first combination;

[0062] A visible light laser source, a laser beam expander, a diaphragm, a light modulation device, and a visible light projection lens are sequentially installed on the left side of the first assembly, which is denoted as the second assembly;

[0063] During the installation of the second assembly, ensure that the optical axes of the visible...

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Abstract

The invention relates to the technical field of terahertz imaging, in particular to a single-pixel imaging method and system based on terahertz free electron laser, and the main points of the technical scheme are that the method comprises the following steps: S1, providing a single-pixel imaging system based on terahertz free electron laser; and S2, on the single-pixel imaging system, obtaining a target object image according to a generalized orthogonal tracking algorithm. The method has the advantages of being good in reconstructed image quality, high in peak signal-to-noise ratio and high in structural similarity.

Description

technical field [0001] The present invention relates to the technical field of terahertz imaging, more specifically, it relates to a single-pixel imaging method and system based on terahertz free electron laser. Background technique [0002] Free-electron lasers (FELs) have many advantages over existing laser sources. For example, high and adjustable peak power and average power, continuously adjustable frequency, good coherence, strong polarization, picosecond time structure, etc. At present, FEL has become a high-power ideal terahertz source with full coverage of the terahertz band. [0003] Terahertz waves can penetrate many common materials without damage, such as colloids, paper products, powders, etc., and realize non-destructive and non-contact internal imaging of common materials. Commonly used terahertz imaging technologies mainly include point-by-point scanning and array imaging. These two imaging methods have the problems of poor imaging quality, easy noise int...

Claims

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Application Information

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IPC IPC(8): G01N21/01G01N21/3586
CPCY02E10/549
Inventor 吴衡罗劭娟陈梅云程良伦劳成龙
Owner GUANGDONG UNIV OF TECH
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