CN109900660A - A kind of method and apparatus measuring liquid refractivity - Google Patents
A kind of method and apparatus measuring liquid refractivity Download PDFInfo
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- CN109900660A CN109900660A CN201711297669.1A CN201711297669A CN109900660A CN 109900660 A CN109900660 A CN 109900660A CN 201711297669 A CN201711297669 A CN 201711297669A CN 109900660 A CN109900660 A CN 109900660A
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Abstract
This application discloses a kind of method and apparatus for measuring liquid refractivity.The method that the application measures liquid refractivity forms liquid triangular prism including testing liquid to be fitted into the cavity that hollow molded cavity is triangular prism-shaped；Two sides of liquid triangular prism have transparent window, as optical system for testing, carry out refractometry to liquid triangular prism using the refractive index measuring instrument based on the method for minimum deviation angle, that is, obtain the refractive index of testing liquid.The method for measuring liquid refractive of the application, testing liquid is fixed by liquid triangular prism using the cavity of triangular prism-shaped, to meet the measurement demand of the refractive index measuring instrument based on the method for minimum deviation angle, the measurement accuracy of liquid refractivity is substantially increased, provides a kind of simple and effective scheme for high-precision measuring refractive indexes of liquid.
Description
Technical field
This application involves measuring refractive indexes of liquid fields, more particularly to a kind of method and dress for measuring liquid refractivity
It sets.
Background technique
Demand of the measuring refractive indexes of liquid in fields such as biology, chemistry, pharmacy is very extensive, and the measurement of liquid refractivity can
For studying the characteristics such as liquid substance purity, ingredient, temperature.Currently, for measuring there are two types of the major techniques of liquid refractivity:
Abbe's refractometer and V prism refractometer.The refractometry precision of above two technology is usually 10-4Magnitude, and numerous precisions
Technical field requires the measurement accuracy of liquid refractivity to be 10 such as the refractometry of microcobjective immersion liquid-5~10-6Amount
Grade.
Therefore, existing method for measuring liquid refractive is unable to satisfy high-precision measurement demand, needs to research and develop a kind of new
The higher measuring refractive indexes of liquid scheme of precision.
Summary of the invention
The purpose of the application is to provide a kind of new method for measuring liquid refractivity and used device.
To achieve the goals above, the application uses following technical scheme:
The one side of the application discloses a kind of method for measuring liquid refractivity, including testing liquid is packed into hollow type
Chamber is to form liquid triangular prism in the cavity of triangular prism-shaped；Two sides of liquid triangular prism have transparent window, as test
Optical path carries out refractometry to liquid triangular prism using the refractive index measuring instrument based on the method for minimum deviation angle, that is, obtains to be measured
The refractive index of liquid.
It should be noted that the refractometry precision of the refractive index measuring instrument based on the method for minimum deviation angle can achieve
10-6Magnitude, still, the refractive index measuring instrument based on the method for minimum deviation angle can only measure solid material, be commonly used in light
The optical glass refractive index of system measures, because the refractive index measuring instrument based on the method for minimum deviation angle must add object under test
Work is at triangular prism-shaped, and still, liquid obviously cannot be processed triangular prism-shaped.For this purpose, the proposition of the application creativeness, by prepare liquid
Body is fitted into the cavity that hollow molded cavity is triangular prism-shaped, forms liquid triangular prism, to meet the folding based on the method for minimum deviation angle
Penetrate the measurement demand of rate measuring instrument.Wherein, transparent window is to pass through optical system for testing, it will be understood that transparent window uses
Transparent material closing, the depth of parallelism of the index of refraction homogeneity and window itself of the transparent material, the liquid of window and place face
The depth of parallelism of triangular prism, every error require it is sufficiently small, to ensure the accuracy of testing liquid refractometry.
Preferably, triangular prism is regular triangular prism.
It should be noted that the key of the application is that testing liquid is fixed into triangular prism-shaped by type chamber, usually
Easy to use, the triangular prism of the application all refers to regular triangular prism；As long as it is appreciated that can satisfy based on the method for minimum deviation angle
Refractive index measuring instrument use demand, the shape of specific triangular prism can be adjusted according to the actual situation, do not do have herein
Body limits.
Preferably, transparent window is sealed using transparent glass, two surfacings of transparent glass, smooth, and mutually flat
Row, transparent glass refractive index homogeneity；Also, transparent glass is parallel with the liquid triangular prism side in face where it.
It should be noted that as previously mentioned, the necessary refractive index homogeneity of transparent material of transparent window is closed, also,
The parallelism error of window itself is small, and the parallelism error of window and the liquid triangular prism in place face is small.Wherein, refractive index homogeneity
It is the characteristic of transparent material itself；The parallelism error of window itself is small, refers to that the depth of parallelism on two surfaces of transparent material is good；Window
Mouth is small with the parallelism error of the liquid triangular prism in place face, refers to that the parallelism error after window installs is small.More than being based on
It is required that the application preferably uses transparent glass to close transparent window.
The another side of the application discloses a kind of device for measuring liquid refractivity, which is integrally in triangular prism-shaped, and
And there is the cavity 1 of triangular prism-shaped, through-hole 21 and 22 is offered in the two side walls of the cavity of triangular prism-shaped, through-hole is using saturating
Bright material 3 seals；The side wall of the device of triangular prism-shaped or upper surface offer liquid injection port 4.
Preferably, triangular prism is regular triangular prism.
Preferably, transparent material 3 is transparent glass, and two surfaces 31 and 32 of transparent glass are smooth, smooth, and mutually flat
Row, transparent glass refractive index homogeneity；After installing, transparent glass is parallel with the side of cavity of triangular prism-shaped in face where it.
It should be noted that firstly, the device general frame of the application uses metal or nonmetallic, as long as being capable of shape
At the cavity 1 of triangular prism-shaped；It is to be noted, however, that used material avoids managing with testing liquid as far as possible
Change reaction.Secondly, the transparent material of the closing through-hole of the application preferably uses transparent glass, in the non-corrosive feelings of testing liquid
Under condition, without particular/special requirement, the thickness of transparent glass influences face shape meeting installation strength not for the material type of the transparent glass
In the case of, and be able to bear testing liquid it is hydraulic without influence face shape in the case where, also without particular/special requirement, as long as transparent glass
The index of refraction homogeneity and window parallelism error of material itself require sufficiently small.If being appreciated that testing liquid tool
It is corrosive, then needs to carry out transparent glass specially treated, or select the transparent glass of special substance type, or adopt
With the transparent material of other similar refractive index homogeneities, it is not specifically limited herein.
Preferably, through-hole 21 and 22 is circle, and the size of through-hole matches with the test light bore of refractive index measuring instrument, or
Greater than test light bore.
It should be noted that the effect of through-hole is exactly the optical path that passes through as test light, therefore, as long as the size of through-hole with
Test light bore match or be greater than test light bore, concrete shape can according to demand depending on, this example design through-hole be
Circle, mainly in view of processing and it is easy to use.
Due to using the technology described above, the beneficial effects of the present application are as follows:
Testing liquid is fixed into liquid trigone using the cavity of triangular prism-shaped by the method for measuring liquid refractive of the application
Column substantially increases the measurement of liquid refractivity to meet the measurement demand of the refractive index measuring instrument based on the method for minimum deviation angle
Precision provides a kind of simple and effective scheme for high-precision measuring refractive indexes of liquid.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the device of liquid refractivity is measured in the embodiment of the present application；
Fig. 2 is the decomposition texture schematic diagram that the device of liquid refractivity is measured in the embodiment of the present application；
Fig. 3 is test schematic diagram of the refractive index measuring instrument based on the method for minimum deviation angle to prism；
Fig. 4 is shown based on the refractive index measuring instrument of the method for minimum deviation angle the test of liquid prism in the embodiment of the present application
It is intended to.
Specific embodiment
The method that the application measures liquid refractivity, the creative cavity that testing liquid is fixed on to triangular prism-shaped, from
And the liquid triangular prism that can be measured using the refractive index measuring instrument based on the method for minimum deviation angle is formed, substantially increase liquid
The precision of body refractometry, in a kind of implementation of the application, measuring refractive indexes of liquid precision can achieve 10-6Magnitude.
It should be noted that test light has actually also passed through two thoroughly when measuring liquid triangular prism refractive index
Bright window, no matter what material to close transparent window using, two transparent windows are still with refractive index.Therefore, this Shen
The key factor that method and apparatus please are achieved also resides in, and present inventor demonstrates two transparent glass of plate
Glass does not influence the measurement of liquid triangular prism refractive index, to propose the application.
The application is described in further detail below by specific embodiments and the drawings.Following embodiment is only to the application
It is further described, should not be construed as the limitation to the application.
Embodiment
This example measures the device of liquid refractivity, and as depicted in figs. 1 and 2, device is integrally in triangular prism-shaped, also, is had
The cavity 1 of triangular prism-shaped, through-hole 21 and 22 is offered in the two side walls of the cavity of triangular prism-shaped, and through-hole uses transparent material 3
Sealing；This example opens up liquid injection port 4 in the upper surface of the device of triangular prism-shaped.The device and cavity 1 of this example are all regular triangular prism types,
Wherein, transparent material 3 is transparent glass, and two surfaces 31 and 32 of transparent glass are smooth, smooth, and are parallel to each other, transparent glass
Glass refractive index homogeneity；After installing, transparent glass is parallel with the side of cavity of triangular prism-shaped in face where it.Through-hole 21 and 22
For circle, the size of through-hole is greater than the test light bore of refractive index measuring instrument.
The transparent glass of this example measures its refractive index using plane interference mensuration, it is desirable that transparent glass refractive index grade reaches
To H3 grades or more of SCHOTT uniformity rank.
The method of this example measurement liquid refractivity is that is, testing liquid is fitted into the cavity 1 of this example device, and use tradition
The refractive index measuring instrument based on the method for minimum deviation angle, the refractive index of testing liquid is measured.
Refractive index measuring instrument based on the method for minimum deviation angle needs object under test being processed into triangle, such as in measurement
Shown in Fig. 3, Fig. 3 is the prism of optical glass refractive index measurement, and prism apex angle is α, Refractive Index of Material n, air in figure
Refractive index is n0；Test light is in prism main cross section with incidence angle i1Entered by the face AB and injects prism, refraction angle i1', test
Light is with incidence angle i2Prism, refraction angle i are projected by the face AC2', deviation angle δ.The relationship of above-mentioned five angles is fixed by reflecting
Rule determination is as follows:
n0 sin i1=n sin i1′ (1)
α=i1′+i2 (2)
n sin i2=n0 sin i2′ (3)
α+δ=i1+i2′ (4)
Deviation angle δ is in i1=i2' when there is minimum value δ m, minimum deviation determines by following formula:
In the case where precise measurement prism apex angle α and minimum deviation δ, prism can be calculated by formula (5)
Glass materials refractive index, since current angle measurement technique can realize 0.1 " superelevation measurement accuracy so that be based on minimum deviation
The refractometry technology of method can realize 10-6Magnitude measurement accuracy.
The precondition of the method for minimum deviation angle first is that measured material is made as prism shown in Fig. 3, and liquid without
Method directly makes above-mentioned prism.It, will using the device of this example in order to realize measuring refractive indexes of liquid using the method for minimum deviation angle
Testing liquid is fitted into the cavity 1 of this example device, forms liquid triangular prism to get " liquid prism " is arrived, as shown in figure 4, " liquid
Body prism " only has more two plate transparent glass compared to Fig. 3 tradition prism in the optical path, if it is possible to prove that the two is
Equivalent, then the feasibility that susceptible of proof liquid triangular prism measures.
It needs to prove that the two is equivalent, only need to prove that two plate transparent glass do not influence emergent light i2' angle.?
In Fig. 4, liquid prism apex angle is α, and liquid refractivity n, plate transparent glass refractive index is n ', air refraction n0.
Test light is in prism main cross section with incidence angle i1By the face AB through plate glass incidence feed liquor body prism, in plate glass
Refraction angle be j1, it is respectively j in the incidence angle at the interface AB and refraction angle1' and i1', test light is with incidence angle i2By the face AC through flat
Glass sheet is emitted by liquid prism, is respectively i in the incidence angle at the interface AC and refraction angle2And j2', in plate glass and air
The incidence angle at interface and refraction angle are respectively j2And i2', deviation angle δ.The relationship of above-mentioned angle is determined as follows by the law of refraction:
n0sin i1=n ' sin j1 (6)
n′sin j1'=n sin i1′ (7)
n sin i2=n ' sin j2′ (8)
n′sin j2=n0 sin i2′ (9)
Since two surfaces of plate glass are parallel, therefore j1=j1′、j2=j2' then formula (6), (7), (8) and (9)
Transformation are as follows:
n0sin i1=n sin i1′ (10)
n sin i2=n0sin i2′ (11)
The formula (10) being derived by by Fig. 4 and (11) with by Fig. 3 formula (1) being derived by and (3) unanimously, therefore " liquid
Increased two plate glass of body prism " will not influence the rule of minimum deviation δ m, two plate glass and liquid group
At " liquid prism " and not plate glass simple liquid prism it is equivalent.Therefore, minimum deviation angle formula (5) is to figure
4 " liquid prism " stands good.Using the device of this example, a variety of different testing liquids are replaced with can be convenient, and can
The transparent glass of unlike material and film layer is replaced, easily to adapt to that there is the testing liquid of different chemical attributes.
This example is tested using the device of this example according to refractive index of the above method to deionized water, meanwhile, it uses
Traditional abbe's refractometer compares test to deionized water.The results are shown in Table 1.
1 liquid refractivity test result of table
| This example test method | Abbe's refractometer | |
| Deionized water | 1.334262±3×10-6(22 DEG C, λ@546nm) | 1.334289±40×10-6(22 DEG C, λ@546nm) |
Table 1 the results show that test repdocutbility of this example test method when measuring the refractive index of deionized water reach 3 ×
10-6, minimum deviation refractometer own system error about 2 × 10-6.Use the test error about 40 of high-precision abbe's refractometer
×10-6, the test result deviation of the two is less than 30 × 10-6.The comparing result shows that this example test method can be realized 10-6Amount
The measuring refractive indexes of liquid precision of grade.
The foregoing is a further detailed description of the present application in conjunction with specific implementation manners, and it cannot be said that this Shen
Specific implementation please is only limited to these instructions.For those of ordinary skill in the art to which this application belongs, it is not taking off
Under the premise of from the application design, a number of simple deductions or replacements can also be made.
Claims (7)
1. a kind of method for measuring liquid refractivity, it is characterised in that: including testing liquid is packed into hollow molded cavity as triangular prism
In the cavity of type, liquid triangular prism is formed；Two sides of liquid triangular prism have transparent window, as optical system for testing, use
Refractometry is carried out to the liquid triangular prism based on the refractive index measuring instrument of the method for minimum deviation angle, that is, obtains testing liquid
Refractive index.
2. according to the method described in claim 1, it is characterized by: the triangular prism is regular triangular prism.
3. method according to claim 1 or 2, it is characterised in that: the transparent window is sealed using transparent glass, described
The refractive index homogeneity of transparent glass；Also, transparent glass is parallel with the liquid triangular prism side in face where it.
4. a kind of device for measuring liquid refractivity, it is characterised in that: described device is integrally in triangular prism-shaped, also, has three
The cavity (1) of prismatic offers through-hole (21,22) in the two side walls of the cavity of triangular prism-shaped, and the through-hole (21,22) is adopted
It is sealed with transparent material (3)；The side wall of the device of triangular prism-shaped or upper surface offer liquid injection port (4).
5. device according to claim 4, it is characterised in that: the triangular prism is regular triangular prism.
6. device according to claim 4, it is characterised in that: the transparent material (3) is transparent glass, the transparent glass
Two surfaces (31,32) of glass are smooth, smooth, and are parallel to each other, transparent glass refractive index homogeneity；After installing, transparent glass
It is parallel with the side of cavity of triangular prism-shaped in face where it.
7. device according to claim 4, it is characterised in that: the through-hole (21,22) is circle, the through-hole (21,
22) size matches with the test light bore of refractive index measuring instrument, or is greater than test light bore.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711297669.1A CN109900660A (en) | 2017-12-08 | 2017-12-08 | A kind of method and apparatus measuring liquid refractivity |
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| CN201711297669.1A CN109900660A (en) | 2017-12-08 | 2017-12-08 | A kind of method and apparatus measuring liquid refractivity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345493A (en) * | 2020-10-20 | 2021-02-09 | 广西壮族自治区计量检测研究院 | Liquid refractive index measuring method |
| CN113281007A (en) * | 2021-02-25 | 2021-08-20 | 山东大学 | V prism refractive index measuring device with high resolution and low incident angle sensitivity |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202083629U (en) * | 2011-06-16 | 2011-12-21 | 江南大学 | Device for measuring liquid refractive index by adopting minimum deviation angle method |
-
2017
- 2017-12-08 CN CN201711297669.1A patent/CN109900660A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202083629U (en) * | 2011-06-16 | 2011-12-21 | 江南大学 | Device for measuring liquid refractive index by adopting minimum deviation angle method |
Non-Patent Citations (1)
| Title |
|---|
| 李海东 等: "测量液体折射率的新方法", 《山西师大学报（自然科学版）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345493A (en) * | 2020-10-20 | 2021-02-09 | 广西壮族自治区计量检测研究院 | Liquid refractive index measuring method |
| CN113281007A (en) * | 2021-02-25 | 2021-08-20 | 山东大学 | V prism refractive index measuring device with high resolution and low incident angle sensitivity |
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Address after: 130033 No. 1 Building, Incubation Base, 77 Yingkou Road, Changchun Economic Development Zone, Jilin Province Applicant after: Changchun Changguang Huada Zhizao sequencing Equipment Co.,Ltd. Address before: 130033 Building 1, hatchery, 77 Yingkou Road, Changchun Economic Zone, Jilin Applicant before: CHANGGUANG HUADA GENE SEQUENCING EQUIPMENT (CHANGCHUN) Co.,Ltd. |
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Application publication date: 20190618 |
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