Vector light field guided-mode enhanced fluid component detection method

Abstract

The invention relates to a vector light field guided-mode enhanced fluid component detection method. Under the condition that the numerical aperture of the light emitted by the laser is fixed, collimation is performed through lenses, the polarizer and the half-wave plate rotate; after passing through a phase plate subjected to phase and amplitude modulation of the spatial light modulator, the light is emitted; the light enters the light field mode guider, is totally reflected for multiple times in the light field mode guider, is subjected to light enhancement through a micro-nano structure onthe surface of the light field mode guider during each reflection, then carries detected information to be emitted and enters the detection module after passing through the light field vector characteristic filtering element, and spectral data containing fluid component parameter information is obtained. The method has the characteristics of simplicity, good real-time performance, high sensitivity, comprehensive information, high reliability and the like.

Description

technical field [0001] The invention relates to a fluid component detection method, in particular to a vector light field guided mode enhanced fluid component detection method, which belongs to the technical field of component detection. Background technique [0002] Fluid is a substance that can flow, and it is an object that will continuously deform under the action of any small shear force. Fluid is the general term for liquids and gases. Fluid composition detection requirements widely exist in many fields such as environmental analysis, resource exploration, food safety, life sciences, medical treatment, industrial process control, national defense security, etc., and the sensitivity requirements for fluid composition detection in these fields are also getting higher and higher. Water substance analysis and detection technology is a representative practical application case of fluid composition detection. Water resources are one of the indispensable and irreplaceable im...

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Problems solved by technology

[0003] In the prior art, there are fluid composition detection technologies, such as water quality analyzers, and many companies at home and abroad have market circulation detection technology products, such as American Hach Company, Japan Shimadzu Company, Austrian Energy Company, Domestic Concentrating Company, Pioneer companies, etc., the existing technology can measure the fluid composition, but there are some essential deficiencies: 1) The detection method is complicated, and the sampling water quality analyzer needs to pretreat the water to be tested, and then use the chemical or physical detection principle to analyze, And it needs to replace reagents and other processes, which has high requirements for operators, inconvenient use, complex methods, and the possibility of secondary environmental pollution; There is a useful information cascading method effect, so the sensitivity of analysis and detection is limited, and it is easy to receive interference, which affects the reliability of detection technology; 3) The structure is complex, difficult to integrate, and difficult to expand functions

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