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Visual terahertz time-domain spectroscopy detection device, detection method and application

A terahertz time-domain and spectral detection technology, which is applied in the direction of measuring devices, optical testing of defects/defects, and material analysis through optical means, can solve problems such as interference in the measurement of the detection system, and achieve the effect of convenient use

Pending Publication Date: 2021-11-16
LINGAO NUCLEAR POWER +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of a new light source and the opening of holes in the mirror interfere with the measurement of the existing detection system. It is necessary to improve the system and reuse the existing femtosecond laser without destroying the existing optical path and optical devices. Realize the visualization of inspection system

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  • Visual terahertz time-domain spectroscopy detection device, detection method and application
  • Visual terahertz time-domain spectroscopy detection device, detection method and application

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Embodiment 1

[0038] see figure 1 , a visual terahertz time-domain spectrum detection device of this embodiment, comprising:

[0039] The femtosecond laser beam splitter 2 is used to split the incident femtosecond laser 1 to generate the first laser and the second laser; wherein, the first laser is used to realize the generation of terahertz wave 4 and utilize the generated terahertz Wave 4 detects the aging degree of the material inside the sample 9, and the second laser is used to indicate the loading position of the sample 9 and its defect detection position to realize the visualization of the detection. Wherein, the central wavelength of the incident femtosecond laser 1 is 800nm, and the incident femtosecond laser 1 is also doped with coaxial red light, which exists as an indicator light, and the transmission and reflection splitting ratio of the femtosecond laser beam splitter 2 is 9:1.

[0040] The photoconductive terahertz emitter 3 is arranged in front of the femtosecond laser bea...

Embodiment 2

[0048] The visual terahertz time-domain spectrum detection method in this embodiment is based on the detection device in Embodiment 1, and includes the following steps:

[0049] The central wavelength is 800nm, and the incident femtosecond laser 1 doped with coaxial red light is split by the femtosecond laser beam splitter 2 to generate the first laser and the second laser, and the transmission and reflection of the femtosecond laser beam splitter 2 The ratio is 9:1. The first laser beam passes through the photoconductive terahertz emitter 3 to generate a terahertz wave 4, which is reflected by the first terahertz wave emitter 5, and is completely transmitted to the second terahertz wave through the high-resistance single crystal silicon lens 11. The Hertz wave reflector 10 reflects, passes through the sample 9 to the third terahertz wave reflector 8, and then reflects to the fourth terahertz wave reflector 6, and finally the terahertz wave reflector 6 reflects the terahertz wa...

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Abstract

The invention discloses a visual terahertz time-domain spectroscopy detection device, a detection method and application, the detection device and the detection method provide a light path multiplexing scheme, femtosecond laser is split, the first path of light realizes generation and detection of terahertz waves, the second path of light realizes a laser indication function, therefore, the visual detection of the sample is realized. According to the visual terahertz time-domain spectrum detection device disclosed by the invention, femtosecond laser for generating terahertz waves is multiplexed into indication laser through light splitting design, so that determination and visualization of a sample loading position and a defect detection position are facilitated, and use by a user is facilitated; and the laser fault condition can be quickly identified for a user.

Description

technical field [0001] The invention belongs to the field of spectrum analysis and non-destructive testing, and in particular relates to a visualized terahertz time-domain spectrum detection device, detection method and application. Background technique [0002] Terahertz (THz) waves refer to far-infrared electromagnetic radiation with a frequency between 0.1THz–10THz. In the past two decades, optical technology has made great progress in the THz frequency band, providing suitable light sources and detection methods for THz waves. THz Science and technology are able to develop rapidly. THz wave has the advantages of coherence and low photon energy. The imaging technology based on THz wave can distinguish the morphology and composition of the sample at the same time. It is an excellent non-destructive testing technology. Under different aging states, insulating materials have different components, molecular internal chemical structures, and microscopic forces, resulting in d...

Claims

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Application Information

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IPC IPC(8): G01N21/3586G01N21/3563G01N21/88G01N21/01
CPCG01N21/3586G01N21/3563G01N21/88G01N21/01Y02E30/30
Inventor 杭玉桦方奎元王英杰王春辉刘韬安英辉
Owner LINGAO NUCLEAR POWER
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