Micro-amount liquid reflective rate measuring device and measuring method based on self-mixing interference

A self-mixing interference and measurement device technology, applied in the field of optical measurement, can solve the problems of large demand for liquid to be measured and cannot realize micro-measurement, measuring equipment and instruments require engraving, difficult to measure precious and scarce samples, etc., and achieve easy industrial application , The measurement method is simple and the effect of low requirements

Active Publication Date: 2018-11-13
JIMEI UNIV
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Problems solved by technology

[0004]The existing refractive index measurement methods mainly have the following problems: (1) The demand for the liquid to be measured is relatively large, and micro-measurement cannot be realized, and it is difficult to measure precious and scarce samples ; (2) The requirements for measuring equipment and instruments are relatively strict, especially under high-precision measurement conditions, the measurement process is not easy to operate

Method used

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  • Micro-amount liquid reflective rate measuring device and measuring method based on self-mixing interference
  • Micro-amount liquid reflective rate measuring device and measuring method based on self-mixing interference
  • Micro-amount liquid reflective rate measuring device and measuring method based on self-mixing interference

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Embodiment 1

[0044] see figure 2 , The invention discloses a refractive index measurement device based on self-mixing interference, which includes an optical path part and a signal processing part. The optical path part includes a laser light source 11, a phase adjuster 12, an optical path refraction unit 13, and an object-carrying platform 14; the object-carrying platform 14 is used to load the sample to be measured; The sample to be tested is connected with the optical axis in sequence. The signal processing part includes a signal preprocessing circuit 21 , an A / D conversion circuit 22 , a DSP data processing unit 23 and an output terminal 24 . The input end of the signal preprocessing circuit 21 is connected to the laser light source 11, and the signal preprocessing circuit 21, the A / D conversion circuit 22, the DSP data processing unit 23 and the output terminal 24 are circuit connected in sequence.

[0045]In this embodiment, the laser light source 11 is a semiconductor laser, on w...

Embodiment 2

[0049] Cooperate figure 2 and image 3 As shown, the present invention discloses a method for measuring refractive index based on self-mixing interference. The method uses the device for measuring refractive index based on self-mixing interference in Embodiment 1, and is specifically implemented through the following steps:

[0050] S1. Place the standard sheet on the stage, turn on the laser light source, adjust the loading platform, make the laser irradiate on the standard sheet, and ensure that the reflected laser light can pass back to the laser light source;

[0051] S2, start the phase regulator, input the reference value R of the standard film 1 , the DSP data processing unit calculates the light feedback intensity C at this time 1 (Adopt waveform fitting method, characteristic point analysis method or spectrum analysis method, adopt waveform fitting method in the present embodiment), store C 1 and R 1 ;

[0052] S3. Adjust the thickness and area of ​​the cell cav...

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Abstract

The invention discloses a micro-amount liquid reflective rate measuring device based on self-mixing interference. The micro-amount liquid reflective rate measuring device based on self-mixing interference comprises an optical path part and a signal processing part; the optical path part comprises a laser light source, a phase regulator, an optical path catadioptric unit, and an object carrying platform; the object carrying platform is loaded with a sample to be measured; the laser light source, the phase regulator, the optical path catadiopric unit, and a sample to be measured are connected successively through optical path connection; the signal processing part comprises a signal pre-treatment circuit, an A/D converting circuit, a DSP data processing unit, and an output terminal; an inputterminal of the signal pre-treatment circuit is connected with the laser light source; the signal pre-treatment circuit, the A/D converting circuit, the DSP data processing unit, and the output terminal are connected successively through circuit connection. The invention also discloses a reflective rate measuring method based on self-mixing interference. The micro-amount liquid reflective rate measuring device is simple in structure, and wide in measuring range; the measuring method is simple and convenient in operation, and high in measuring precision.

Description

technical field [0001] The invention relates to the technical field of optical measurement, in particular to a device and method for measuring the refractive index of trace liquid based on self-mixing interference. Background technique [0002] The refractive index is one of the important optical parameters of a substance, and the optical properties, concentration, and purity of the substance can be understood by means of the refractive index. In food, medicine and other industrial departments and college experiments, the refractive index of liquid has high application value. In recent years, with the rise and development of biochemical engineering, environmental pollution control, especially water pollution control, the research and application fields of liquid refractive index are also expanding, and the measurement of liquid refractive index is particularly necessary. [0003] The common liquid refractive index measurement methods mainly include: geometric optics method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/45
CPCG01N21/45
Inventor 王秀琳
Owner JIMEI UNIV
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