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Portable terahertz spectrum detection device and detection method

A detection device and a technology of terahertz detection, which are applied in the field of terahertz detection, can solve the problems of limited use, bulky detection device, bulky volume, etc., and achieve the effects of large space utilization, large application potential, and wide application range

Active Publication Date: 2016-07-06
ZHEJIANG UNIV
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Problems solved by technology

Because the generated terahertz frequency band is very wide, it is very difficult to accurately control the broadband terahertz, which makes some detection devices have poor terahertz generation and detection effects, bulky, and limited use
Chinese patent document CN105092515A discloses a detection method based on terahertz spectroscopy technology for the full-component granule of the Chinese herbal medicine P. Carry; the accuracy of the data processing method used is related to the thickness and absorption characteristics of the sample, which has higher requirements for the sample to be tested
These deficiencies greatly limit the application of terahertz time-domain spectroscopy.

Method used

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  • Portable terahertz spectrum detection device and detection method
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  • Portable terahertz spectrum detection device and detection method

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following examples.

[0042] Such as Figure 1 to Figure 3 As shown, a portable terahertz spectrum detection device includes a box body 7, a small box cover 34 and a large box cover 35, and a spectroscopic module 1 installed in the box body 7, a phase angle compensation module 2, a detection optical path module 3, and an optical path module 3. Hertz generation module 4, terahertz detection module 5, terahertz optical path module.

[0043] Such as figure 2 As shown, the light splitting module 1 includes a half-wave plate 10 and a beam splitter 11 for splitting the incident femtosecond pulsed laser light into the phase angle compensation module 2 and the detection optical path module 3 . Phase angle compensation module 2: including β-barium borate wafer 12, α-barium borate wafer 13, quartz wedge pair 14 and dual-wavelength...

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Abstract

The invention relates to a portable terahertz spectrum detection device and a detection method, and aims at providing a portable terahertz spectrum detection device and a method which can conduct measuring on terahertz spectra of samples with different thicknesses and different absorption characteristics. According to the technical scheme, the portable portable terahertz spectrum detection device comprises a case body, a light splitting module, a phase angle compensation module, a detection light path module, a terahertz generating module, a terahertz detecting module and a terahertz light path module. The terahertz spectrum detection method comprises the following steps that 1, a time domain waveform Er(t) is collected; 2, the center of a sample is located on the waist of a terahertz beam; 3, a time domain waveform Es(t) of the sample is measured; 4, Fourier transforming is conducted respectively to obtain frequency domain distribution of two signals; 5, a data processing model based on a Fresnel formula is adopted; 6, operation from the third step to the fifth step is repeated, and terahertz spectrum signals of the samples in different polarization directions are obtained.

Description

technical field [0001] The invention relates to the technical field of terahertz detection, in particular to a portable terahertz spectrum detection device and a detection method. Background technique [0002] Terahertz radiation refers to a section of electromagnetic waves with a frequency between 0.1THz and 10THz. It is in the transition zone from macroelectronics to microphotonics, and has many unique advantages. Terahertz photons have low energy and have good penetration for many dielectric materials and non-polar liquids. The transitions between vibrational energy levels and rotational energy levels of many polar macromolecules are just in the terahertz frequency range. Therefore, terahertz waves are suitable for safe and non-destructive non-contact detection. Studying the terahertz spectral response of substances is of great significance for in-depth revealing of their composition, structure and physical and chemical properties. Among them, terahertz time-domain spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3586
CPCG01N21/3586G01N2201/06
Inventor 应义斌王陈谢丽娟黄宇新
Owner ZHEJIANG UNIV
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