Liquid sample holder and method for terahertz time-domain spectroscopy
A technology of terahertz time domain and liquid samples, which is applied in the direction of measuring devices, phase-influenced characteristic measurement, and material analysis through optical means, which can solve the problems that the sample thickness is difficult to control, affects the detection accuracy, and cannot continuously adjust the thickness of liquid samples, etc. , to achieve the effect of reducing repeated sample clamping process, improving detection efficiency and reliable reference value
Active Publication Date: 2015-09-30
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to overcome the shortcomings in the prior art that the thickness of the liquid sample cannot be continuously adjusted, and the thickness of the sample is difficult to control and affect the detection accuracy, and to provide a liquid sample holder suitable for terahertz time-domain spectroscopy and its method
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[0029] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.
[0030] Such as figure 1 and 2 As shown, the liquid sample holder suitable for terahertz time-domain spectroscopy of the present invention includes two parallel and opposite sample clips 1 and 2 . The sample clip 1 includes a substrate 11 on which four windows 111 arranged in a matrix are arranged. A window 12 is fixed on the side of the substrate 11 opposite to the sample bag 7 . Similarly, the sample clip 2 includes a substrate 21 with a window 211 , and a window 22 is provided on the side of the substrate 21 opposite to the sample bag 7 . The substrates 11 and 12 can be made of stainless steel plates, aluminum alloys or copper plates, and the windows 12 and 22 are made of materials with high permeability in the terahertz band, such as polyethylene or polytetrafluoroethylene or silic...
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The present invention discloses a liquid sample stand suitable for terahertz time-domain spectral measurement and a method thereof. The liquid sample stand comprises two parallel sample clamping pieces for clamping sample bags provided with a plurality of windows; an optical path adjusting mechanism for adjusting the space between two sample clamping pieces and making the sample clamping pieces to clamp sample bags, which is connected to one clamping piece of the two sample clamping pieces; a base seat, the optical path adjusting mechanism and the sample clamping pieces no-connected to the optical path adjusting mechanism are fixedly arranged on a base plate of the base seat; a traveling mechanism for switching-over transmission windows of detected faculae or adjusting the position of an identical window relative to the detected faculae, and the traveling mechanism is connected to the base seat. According to the liquid sample stand and the method thereof, the thickness of the sample in the sample bag can be changed continuously, and the repeatability with identical thickness can be realized through the windows arranged on the sample clamping pieces, which can realize more reliable reference value among various samples with an identical series, and can reduce measurement errors.
Description
technical field [0001] The invention relates to a sample holder for spectrum measurement and a method thereof, in particular to a liquid sample holder suitable for terahertz time-domain spectrum measurement and a method thereof. Background technique [0002] The terahertz time-domain spectroscopy system is a coherent detection technique that can simultaneously obtain the amplitude and phase information of a terahertz pulse. This technology uses terahertz pulse transmission or reflection from the sample to record the terahertz time-domain electric field waveform, and obtain the sample spectrum through fast Fourier transform. Through data processing and analysis, the optical parameters of the tested sample can be obtained. Such as refractive index, absorption coefficient, etc., and then obtain some important physical and chemical information of the sample. [0003] In terahertz time-domain spectroscopy, different samples have different absorption of terahertz light. When lig...
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IPC IPC(8): G01N21/01G01N21/45
Inventor 赵红卫吴胜伟朱海云张增艳李晴暖刘晓鸿朱智勇
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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