Trace liquid refractive index measuring system and measuring method

A technology of trace liquid and measurement system, which is applied in the direction of phase influence characteristic measurement, etc. It can solve the problems of large structure and decreased sensitivity of interference signal detection, and achieve the effect of small volume, compact structure and improved sensitivity

Inactive Publication Date: 2012-08-15
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

The condition of far-field interference results in a large system structure
The Bornhop group developed the backscattering interferometry method, the laser illuminates a part of the channel, and uses a position sensitive sensor or CCD to detect the movement of the stripes, but the stray light interference of the backscattering method causes a decrease in the detection sensitivity of the interference signal

Method used

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  • Trace liquid refractive index measuring system and measuring method
  • Trace liquid refractive index measuring system and measuring method
  • Trace liquid refractive index measuring system and measuring method

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Embodiment Construction

[0034] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] see figure 1 A measurement system for the refractive index of a trace liquid is shown, including a laser light source 11, using a He-Ne laser light source (He-Ne laser, Melles Griot, USA);

[0036] The telescope is located in front of the laser light source 11. The telescope includes a first convex lens 12 (linos Inc., Qioptiq) and a second convex lens 13 (linos Inc., Qioptiq) arranged in parallel. The laser light source 11 passes through the first convex lens along the main optical axis. Convex lens 12 and the second convex lens 13; The back focal point of the first convex lens 12 is figure 1 The left focus of the first convex lens 12 and the front focus of the second convex lens 13 are figure 1 The right focus of the middle second convex lens 13 coincides;

[0037] The first optical flat glass 14 (Edmund Optics), i...

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Abstract

The invention discloses a trace liquid refractive index measuring system and measuring method. The measuring system comprises a laser source, a first convex lens, a second convex lens, a first optical flat glass, a micro fluid control chip, a second optical flat glass and a CCD (charge coupled device) detector, wherein a collimation light emitted out by the laser source passes through the first convex lens and the second convex lens to produce a light with a smaller light spot, the light is incident to the first optical flat glass in an angle of 45 degrees to produce a reflected light and a refracted light, anyone of the reflected light and the refracted light passes through a micro fluid channel, the other light directly passes through the micro fluid control chip to enter into the second optical flat glass, the reflected light and the refracted light are converged together after passing through the second optical flat glass and are interfered to form an interference signal, and the CCD detector is used for detecting an interference light signal. The micro fluid control chip disclosed by the invention can reduce analysis cost, and pollution of waste produced by an analysis process to the environment is reduced. The whole device has the characteristics of compact structure, small volume, easy maintenance and convenience in carrying.

Description

technical field [0001] The invention relates to the measurement technology of the refractive index of liquid, and more specifically relates to a measurement system and method for the refractive index of trace liquid. Background technique [0002] Refractive index is an important measurement parameter of liquid in industrial and agricultural production and scientific research, and it is an important technical means to ensure product quality and improve product output. The measurement and control of the refractive index of liquid has a wide range of applications in industries such as environmental monitoring, food quality, pharmaceuticals, and disease diagnosis. The refractive index is one of the basic physical quantities that characterize the optical properties of light-transparent substances. In various light-transparent substances, changes in physical quantities such as density, concentration, temperature, and stress will cause corresponding changes in the refractive index....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/45
Inventor 陈明惠宋成利王成崔海波徐兆红黄娟
Owner UNIV OF SHANGHAI FOR SCI & TECH
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