Transmission sample bin for uninterruptedly measuring terahertz time-domain spectroscopy system

Abstract

The invention discloses a transmission sample bin for uninterruptedly measuring a terahertz time-domain spectroscopy system. The transmission sample bin comprises an emission light path unit, a detection light path unit, a sample turntable, a sample turntable rotating motor and a sample bin, the emission light path unit and the detection light path unit are both arranged in the sample bin; one part of the sample turntable is arranged in the sample bin; the other part hermetically penetrates through the sample bin shell and is arranged outside the sample bin; the sample turntable is arranged between the emission light path unit and the detection light path unit; sample fixing holes are uniformly formed in the sample turntable in the circumferential direction; the sample turntable rotating motor is connected with the sample turntable and drives the sample turntable to rotate, so that the sample fixing holes are switched between the interior and the exterior of the sample bin, and the sample fixing holes containing samples to be detected are formed in a terahertz optical path optical axis formed by the emission optical path unit and the detection optical path unit. Automatic sample introduction is realized through the sample turntable rotating motor and the sample turntable, and an air one-way valve is selected to control the flow rate of air entering and exiting the sample bin toensure constant pressure in the bin.

Description

Technical field: [0001] The invention belongs to the technical field of terahertz time-domain spectroscopy and imaging, and in particular relates to a transmission sample chamber of a system for continuously measuring terahertz time-domain spectroscopy. Background technique: [0002] Terahertz technology is a hot research field that has emerged in the past ten years. Terahertz waves are electromagnetic waves with a frequency between 0.1-10THz (corresponding to a wavelength of 30μm-3mm), and are between microwaves and infrared rays on the electromagnetic spectrum. Terahertz time-domain spectroscopy detection technology can detect subtle differences between material structures, and can strongly respond to low-frequency vibrations and resonances of crystal lattices in crystals. For dipole rotations, hydrogen bonds, vibrational transitions, and van der Waals forces between organic molecules Weak interactions also have a very strong response, enabling sensitive detection of isome...

AI Technical Summary

Problems solved by technology

In order to solve the above problems in the use of the sample chamber, the purpose of the present invention is to provide a design of the transmission sample chamber of the terahertz time-domain spectroscopy system for continuous measurement and a sample injection method, so as to ensure that the sample chamber is continuously filled with dry air. Realize the automatic sampling of samples under certain circumstances, realize the purpose of continuous real-time measurement of the system, reduce the impact caused by the change of the humidity of the gas environment in the sample chamber during the process of taking and placing samples, and improve the efficiency of system testing

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