CN102590141A - Mixture refractive index measurement method based on total internal reflection - Google Patents
Mixture refractive index measurement method based on total internal reflection Download PDFInfo
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- CN102590141A CN102590141A CN2012100621417A CN201210062141A CN102590141A CN 102590141 A CN102590141 A CN 102590141A CN 2012100621417 A CN2012100621417 A CN 2012100621417A CN 201210062141 A CN201210062141 A CN 201210062141A CN 102590141 A CN102590141 A CN 102590141A
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Abstract
The invention relates to a mixture refractive index measurement method based on a total internal reflection principle. Parallel light sources are used to radiate on an interface of a prism-mixture sample at different angles, the reflection light is detected to obtain curves of reflection light intensity of the mixture sample along with angles, the curve is derived to obtain a total internal reflection critical angle corresponding to each component in the mixture sample, and the refractive index of each component in the mixture sample is further obtained. The method is used for researching on the components in the complicated mixture sample to obtain the refractive index of each component.
Description
Technical field
The present invention relates to a kind of assay method of material refractive index, particularly a kind of method of measuring each component refractive index of compounding substances based on total internal reflection principle.
Background technology
Refractive index is one of critical nature of material, and the refractometry of material all has wide application at numerous areas such as environmental monitoring, medical diagnosis, monitoring in real time, and the measurement of material refractive index itself also is an important content of optics.At present; The method that is used for the measurement of species refractive index has a lot, and like natural collimation method, minimum deviation horn cupping, V-type prism method or the like, these methods differ from one another; All be to be based upon on the refraction reflection law basis, and these methods all only are used to measure the refractive index properties of homogeneous substance.Yet, up to now, also do not have a kind of method can realize the compounding substances of complicacy is measured, and can access the method for the refractive index of each component of compounding substances.
Summary of the invention
The object of the present invention is to provide a kind of material can measuring complex, that mix, and obtain the method for the refractive index of each component.
For realizing above-mentioned purpose, step of the present invention is following:
The first step: use directional light as light source; Pass through polaroid; By the incident and being radiated on the interphase of prism-biased sample at an angle of a side of prism, its reflected light uses light intensity detector to detect, receive emergent light through the opposite side outgoing of prism; And data are sent into computing machine, thereby obtain the reflective light intensity value of biased sample under this angle.
Second step: keep the point of irradiation of incident beam on prism-biased sample interface not change; Rotate prism; Change the incident angle of prism-biased sample interface incident light; Repeat first step process, obtain the reflective light intensity value of biased sample under the different angles, thereby obtain the distribution curve that reflective light intensity changes with incident angle.
The 3rd step: the curve angle to second step obtained is carried out differentiate; On the curve of derivative, obtain and the corresponding a plurality of peaks of the first number of biased sample component to be measured; The position at each peak is to critical angle for total internal reflection that should a kind of component of sample; According to the relational expression between critical angle for total internal reflection and the refractive index, can obtain the refractive index of this each component of biased sample.
Description of drawings
Fig. 1 is the light path synoptic diagram of this method.
Fig. 2 is the distribution curve of black and white strip marble binary sample reflective light intensity to incident angle of light.
Fig. 3 is the derivative of black and white strip marble binary sample reflected light distribution angle.
Fig. 4 is the distribution curve of the strange super88 spray of 705 silicon rubber, glycerine, Gu Er glue ternary sample reflective light intensity to incident angle of light.
Fig. 5 is the derivative of 705 silicon rubber, glycerine, the strange super88 spray of Gu Er glue ternary sample reflective light intensity distribution angle.
Embodiment
Below in conjunction with the concrete once implementation method of description of drawings:
Fig. 1 is the employed light path synoptic diagram of this method, among the figure, and the 1st, source of parallel light; The 2nd, polaroid is used to generate needed polarized light; The 3rd, prism; The 4th, biased sample to be measured; The 5th, light intensity detector is used to detect the light intensity of emergent light; The 6th, computing machine is used to gather the data of light intensity detector 5 and handle.
The practical implementation step of this method is following:
The first step: use directional light as light source 1; Through polaroid 2; By the incident and being radiated on the interphase of prism-biased sample at an angle of a side of prism 3, its reflected light uses light intensity detector 5 to detect, receive emergent light through the opposite side outgoing of prism 3; And data are sent into computing machine 6, thereby obtain the reflective light intensity value of biased sample under this angle.
Second step: keep the point of irradiation of incident beam on prism-biased sample interface not change; Rotate prism 3; Change the incident angle of incident light on prism-biased sample interface; Repeat first step process, obtain the reflective light intensity value of biased sample under the different angles, thereby obtain the distribution curve that reflective light intensity changes with incident angle.
The 3rd step: the curve angle to second step obtained is carried out differentiate; On the curve of derivative, obtain and the corresponding a plurality of peaks of the first number of biased sample component to be measured; The position at each peak is to critical angle for total internal reflection that should a kind of component of sample; According to the relational expression between critical angle for total internal reflection and the refractive index, can obtain the refractive index of this each component of biased sample.
Embodiment 1 based on this method: use the alternate marble of black and white strip as the binary testing sample.Fig. 2 is the distribution curve of the reflective light intensity of this binary sample to incident angle of light.Fig. 3 is to use the curve angle among Fig. 2 to carry out the resulting curve of differentiate.Can see two tangible peaks among the figure, distinguish the critical angle for total internal reflection of two kinds of components of corresponding marble sample, and then obtain the refractive index of every kind of component.
Claims (1)
1. the measuring method of a potpourri refractive index based on total internal reflection principle, is characterized in that; This method may further comprise the steps: the first step: use directional light as light source, through polaroid, by the incident and being radiated on the interphase of prism-biased sample at an angle of a side of prism; Its reflected light is through the opposite side outgoing of prism; Use light intensity detector to detect, receive emergent light, and data are sent into computing machine, thereby obtain the reflective light intensity value of biased sample under this angle;
Second step: keep the point of irradiation of incident beam on prism-biased sample interface not change; Rotate prism; Change the incident angle of incident light on prism-biased sample interface; Repeat first step process, obtain the reflective light intensity value of biased sample under the different angles, thereby obtain the distribution curve that reflective light intensity changes with incident angle;
The 3rd step: the curve angle to second step obtained is carried out differentiate; On the curve of derivative, obtain and the corresponding a plurality of peaks of the first number of biased sample component to be measured; The position at each peak is to critical angle for total internal reflection that should a kind of component of sample; According to the relational expression between critical angle for total internal reflection and the refractive index, can obtain the refractive index of this each component of biased sample.
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| CN2012100621417A CN102590141A (en) | 2012-03-12 | 2012-03-12 | Mixture refractive index measurement method based on total internal reflection |
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| CN2012100621417A CN102590141A (en) | 2012-03-12 | 2012-03-12 | Mixture refractive index measurement method based on total internal reflection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568838A (en) * | 2013-10-28 | 2015-04-29 | 南开大学 | Total internal reflection method-based automatic wide-spectrum range substance dispersion measurement device |
| CN104749137A (en) * | 2015-04-07 | 2015-07-01 | 清华大学 | Liquid refractive index measurement system and method |
| CN107153049A (en) * | 2017-05-31 | 2017-09-12 | 华中科技大学 | A kind of material refractive index measurement apparatus for suppressing veiling glare |
| CN109959633A (en) * | 2019-04-03 | 2019-07-02 | 香港生产力促进局 | A kind of intelligent soup ladle |
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| US20020021443A1 (en) * | 2000-07-11 | 2002-02-21 | Srivatsa Venkatasubbarao | Apparatus including a biochip for imaging of biological samples and method |
| CN1963464A (en) * | 2005-11-08 | 2007-05-16 | 中国科学院力学研究所 | Total internal reflection ellipsometry imaging device and method therefor |
| CN101990633A (en) * | 2008-02-01 | 2011-03-23 | 莱尔照明公司 | Methods, devices and kits for peri-critical reflectance spectroscopy |
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2012
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Patent Citations (5)
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| US2012200A (en) * | 1935-04-19 | 1935-08-20 | Oberosler Charles | Piston ring expander and compressor |
| CN1193740A (en) * | 1996-02-09 | 1998-09-23 | 福建师范大学 | Method and apparatus for full reflection measurement of material refractive index |
| US20020021443A1 (en) * | 2000-07-11 | 2002-02-21 | Srivatsa Venkatasubbarao | Apparatus including a biochip for imaging of biological samples and method |
| CN1963464A (en) * | 2005-11-08 | 2007-05-16 | 中国科学院力学研究所 | Total internal reflection ellipsometry imaging device and method therefor |
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Non-Patent Citations (3)
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| CHUNPING ZHANG，ET AL.: "Determination of the refractive index of a bacteriorhodopsin film", 《OPTICS LETTERS》, vol. 19, no. 18, 15 September 1994 (1994-09-15) * |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568838A (en) * | 2013-10-28 | 2015-04-29 | 南开大学 | Total internal reflection method-based automatic wide-spectrum range substance dispersion measurement device |
| CN104749137A (en) * | 2015-04-07 | 2015-07-01 | 清华大学 | Liquid refractive index measurement system and method |
| CN104749137B (en) * | 2015-04-07 | 2017-09-22 | 清华大学 | The measuring system and measuring method of liquid refractivity |
| CN107153049A (en) * | 2017-05-31 | 2017-09-12 | 华中科技大学 | A kind of material refractive index measurement apparatus for suppressing veiling glare |
| CN109959633A (en) * | 2019-04-03 | 2019-07-02 | 香港生产力促进局 | A kind of intelligent soup ladle |
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Application publication date: 20120718 |