Non-scanning three-dimensional plane laser-induced fluorescence imaging detection method and system
A plane laser-induced, fluorescence imaging technology, applied in the field of fluorescence imaging detection, to achieve the effect of shortening the recording time
Active Publication Date: 2020-04-24
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Therefore, the traditional 3D-PLIF technique is only suitable for the diagnosis of low-velocity flow fields
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[0023] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but it is not limited thereto. Any modification or equivalent replacement of the technical solution of the present invention without departing from the concept and scope of the technical solution of the present invention should be covered by the present invention within the scope of protection.
[0024] In this embodiment, there is no scanning three-dimensional planar laser-induced fluorescence light source such as figure 1 As shown: it includes Nd:YAG laser 1, fuel laser 2, frequency multiplier 3 and first beam splitter 4 arranged in sequence along the optical path. system and a recording system for fluorescence images.
[0025] The spectroscopic transmission system includes a second beam splitter 5, a third beam splitter 6, a fourth beam splitter 7, a first mirror 8, a second mirror 9, a fiber coupler array 10, a first fiber delay line 11, a ...
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The invention belongs to the technical field of fluorescence imaging detection, and particularly relates to a non-scanning three-dimensional plane laser-induced fluorescence imaging detection method and system. According to the method, a single optical pulse is expanded in time-space by laser through a light splitting emission system and shaped into a sheet-shaped light beam through a laser shaping system; plane fluorescence images are sequentially excited on different cross sections of the sample pool; a plane fluorescence image is shot by the optical system and then recorded by a plurality of image enhanced cameras through a light splitting receiving system; each camera is controlled by a synchronous signal system, the exposure delay of each camera is consistent with the time delay of the light splitting emission system, then synchronous recording of plane fluorescence images with different cross sections is further realized and finally transient three-dimensional laser-induced fluorescence distribution is formed. The problem of slow single scanning and recording time in the common 3D-PLIF imaging system is solved and the relevance of captured plane fluorescence images with different cross sections is greatly improved.
Description
technical field [0001] The invention belongs to the technical field of fluorescence imaging detection, and in particular relates to a non-scanning three-dimensional plane laser-induced fluorescence imaging detection method and system. Background technique [0002] Planar laser-induced fluorescence PLIF is widely used in many fields including combustion field and flow field diagnosis due to its extremely high sensitivity to trace element measurement and its ability to image two-dimensional slices. The principle is to irradiate the sample with excitation light having a wavelength at the absorption wavelength of the molecule to be tested, so that the molecule to be tested transitions to an excited state, and then the molecule in the excited state will emit fluorescence and return to the ground state. The concentration, temperature and other distributions of the components to be tested in the sample can be obtained by measuring the fluorescence signal. [0003] The basic system...
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Login to View More IPC IPC(8): G01N21/64
CPCG01N21/6402G01N21/6456
Inventor 张敏睿李亚晖高贵龙何凯韩兆林王俊锋蔡承方玉熳
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI