A system device for measuring the ultimate shear modulus of biological Newtonian fluid

Abstract

The invention provides a system device for measuring the limit shear modulus of biological Newtonian fluid. The device includes a single-mode continuous laser. The single-mode continuous laser emits a beam of light, which is divided into two beams by a beam splitter. The first beam passes through a total reflection mirror and a small aperture diaphragm to adjust the coaxial optical path, and the second beam is incident The total reflection mirror is focused onto the sample through the plano-convex lens, and the scattered light of the sample is collected by the plano-convex lens, and the parallel light is focused on the incident pinhole filter by the plano-convex lens, and then the parallel light through the plano-convex lens becomes linear light incident on the VIPA through the cylindrical lens, The parallel light that comes out is focused on the incident fiber coupler through a plano-convex lens, connected to the CCD to take pictures, and then collected by the acquisition card, the optical signal is converted into an electrical signal, and finally the Brillouin frequency shift image is obtained through computer processing, and then through inference calculation The limiting shear modulus of bio-Newtonian fluid is obtained. The invention has the advantages of accurate measurement, real-time performance, non-contact, non-destructive and clinical application.

Description

technical field [0001] The invention relates to a system device for measuring limit shear modulus, in particular to a system device for measuring limit shear modulus of biological Newtonian fluid. Background technique [0002] At present, most of the methods for measuring the shear modulus of biological Newtonian fluids are based on physical experiments. After repeated tests, the results are obtained. The shortcomings in this process include contact, destructiveness, large errors, non-real-time, and measurement time. There are certain limitations in length and clinical operability. The system device for measuring the ultimate shear modulus of biological Newtonian fluids is used to detect the shear modulus of the mechanical properties of biological tissues. It is mainly used to measure the shear modulus of ophthalmic biological tissues for the diagnosis, treatment and prevention of ophthalmic clinical diseases. broad application prospects. [0003] As a system device for me...

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Problems solved by technology

[0002] At present, most of the methods for measuring the shear modulus of biological Newtonian fluids use physical experiments, and the results are obtained after repeated tests. In this process, there are shortcomings such as contact, destructiveness, large errors, non-real-time, and measurement time. The length and clinical operability have certain limitations, etc.

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