CN101706425A - Liquid prism refractometer - Google Patents
Liquid prism refractometer Download PDFInfo
- Publication number
- CN101706425A CN101706425A CN200910234508A CN200910234508A CN101706425A CN 101706425 A CN101706425 A CN 101706425A CN 200910234508 A CN200910234508 A CN 200910234508A CN 200910234508 A CN200910234508 A CN 200910234508A CN 101706425 A CN101706425 A CN 101706425A
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- Prior art keywords
- liquid
- prism
- refractometer
- refractive index
- hollow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/4133—Refractometers, e.g. differential
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/4133—Refractometers, e.g. differential
- G01N2021/4153—Measuring the deflection of light in refractometers
Abstract
The invention relates to a liquid prism refractometer, in particular to a novel structure of the liquid prism refractometer used for measuring liquid refractive index and a work principle thereof, belonging to the technical field of devices for measuring the refractive index, concentration and density of liquid. The refractometer comprises a monochromatic light source (1), a hollow triple prism (5) and an optical receiving device (6), wherein the hollow triple prism (5) is made of transparent material without limitation of the refractive index, the outer side of a light incidence surface (2) is ground to be a rough surface, and an included angle between the light incidence surface (2) and a light-emitting surface (3) is 60 degrees; an upper bottom surface (4) is provided with a movable cover which is used for canning and pouring the liquid; and a liquid prism can be formed when the liquid is filled. Therefore, the refractive index, the concentration value and the density value of the liquid to be measured can be measured by utilizing the measurement principle of a glancing incidence method. Compared with the existing common prism measuring instruments such as Abbe refractometer and the like, the liquid prism refractometer has wider refractive index measuring range, and simple structure, easy manufacturing, lower cost and higher accuracy.
Description
Technical field
The present invention relates to a kind of liquid prism refractometer structure and principle of work thereof of measurement liquid refractivity of novelty, belong to the technical field of liquid refractivity and concentration, density measure device.
Background technology
The optics of liquids device is the core component of present popular subject microfluid optics.Liquid prism be a kind of be the prism that main body constitutes with liquid, can use separately or be integrated in and be used for various applications in the micro-fluidic chip.By filling liquid whether or by the regulator solution bulk concentration, change the optical property that class of liquids changes liquid prism flexibly, utilize this point can be applicable to: measuring system such as the fluid analysis in optical communication device, fuel laser instrument, biologic medical field, photoimaging system, gradient measurement and education experiment etc.
Fluid analysis field in biologic medical and industry, research laboratory, prism are mainly used in refractive index, density, concentration and the chromatic dispersion of analyzing testing liquid.Usually the prism mensuration has: deflection angle mensuration, angle of minimum deviation mensuration, critical angle total reflection method and SPR method etc.The present invention utilizes liquid itself as prism, and as refracting prisms, and utilize the glancing incidence method to measure the refractive index of fluent material.Concrete principle is as follows.
As shown in Figure 2: the prism of a hollow, drift angle are α, and light entrance face (2) is polished into hair side.When the liquid filling hollow prism, promptly constitute a liquid prism.Monochromatic light such as laser incident form the omnirange diffused light at the plane of incidence (2).Suppose that liquid refractivity is n
l, the prism walls refractive index is n
g, hair side is positioned at the outside of prism facets (2), according to the Snell law:
sin
θ0＝n
gsinθ
1＝n
lsinθ
2
n
lsinθ
3＝n
gsinθ
4＝sinθ
5
θ again
3=α-θ
2
Suppose when the light glancing incidence, promptly incident angle θ 0=90 ° the time, the refraction angle that is arranged in inboard liquid medium of hollow prism face (2) and prism exit facet (3) rear air be θ c with
Have:
And it is as follows to go out the measuring refractive indexes of liquid formula by above-mentioned several derivations of equation:
N as shown from the above formula
lIrrelevant with hollow prism wall refractive index, so the transparent material that hollow prism adopts does not have the restriction of refractive index size.
Any incident angle less than 90 ° light the refraction angle θ 5 at prism exit facet (3) rear greater than
Light is positioned at the glancing incidence light outside.The rear two districts of light and shade occur as the visual field, and shadow line is the position of glancing incidence light in the outgoing of prism rear.If record the refraction angle by light receiving element
Value, i.e. shadow line position then can be drawn the refractive index of testing liquid by the measuring refractive indexes of liquid formula.Further can go out the concentration of testing liquid, density by the relation derivation of refractive index and concentration, density.
When prism vertex angle α=60 °, the measuring refractive indexes of liquid scope is: 1.15～2.
Prism surveying instruments such as present Abbe refractometer, or on the solid prism, smear testing liquid, or the solid prism is invaded testing liquid, general refractometry scope is 1.30～1.70, or filling liquid between several solid prism gap, structure is complicated.
Summary of the invention
Technical matters: the objective of the invention is to propose a kind of liquid prism refractometer, solve in the prism surveying instrument such as present Abbe refractometer that the refractometry scope is little, structure is than problems such as complexity.
Technical scheme: liquid prism refractometer structure of the present invention comprises the prism and the light receiving element of a monochromatic source, hollow.The light entrance face of hollow prism and the angle of exit facet equal 60 °, and the upper bottom surface of hollow prism has a removable cover, is used for canned and pouring liquid, when liquid charges into, promptly constitute a liquid prism.Utilize glancing incidence method measuring principle can record the refractive index of testing liquid.Described hollow prism adopts the transparent material of no refractive index size restriction, and its light entrance face outside is polished into hair side.
Detailed process is as follows: the light by monochromatic source is sent because the liquid prism light entrance face outside is polished into hair side, diffuses so will form omnirange at the plane of incidence.After the liquid prism refraction, be divided into two districts of light and shade at the exit facet rear as the visual field, the position by light receiving element measurement bright-dark cut utilizes aforementioned refractometry formula can derive liquid refractivity.Can further obtain concentration, the density value of corresponding testing liquid by the refractive index value of measuring.
Liquid prism refractometer of the present invention has that the refractometry scope is wide, simple in structure, the advantage of easy making, and only use the prism of a hollow, the other prisms refractometer adopts the situation of a plurality of solid prisms relatively, cost is lower, can avoid simultaneously in the Abbe refractometer class device because liquid is non-homogeneous smears or the measuring error that causes of baste body position light leak not, accuracy is higher.
Beneficial effect: according to above narration as can be known, the present invention has following characteristics:
The present invention utilizes testing liquid itself to measure its refractive index as optical prism, has important techniques and is worth.Prism surveying instrument such as Abbe refractometer relatively at present, liquid prism refractometer of the present invention has wider refractometry scope, simple in structure, easy making, cost is lower than general prism refractometer, the advantage that accuracy is higher.
The innovation part is:
1) utilize testing liquid itself to measure its refractive index as optical prism;
2) simple core texture design only utilizes an one side to be polished into the hollow prism of hair side;
3) have wider refractometry scope and accuracy than existing general prism refractometer;
4) material to the hollow prism does not have the restriction of refractive index size.
Description of drawings
Fig. 1 is a liquid prism refractometer total arrangement synoptic diagram.A monochromatic source 1, the prism plane of incidence 2, prism exit facet 3, prism upper bottom surface 4, hollow prism 5, light receiving element 6 are arranged among the figure.
Fig. 2 is the principle schematic that liquid prism glancing incidence method is measured liquid refractivity.Among the figure: 2 is the prismatic light plane of incidence, and 3 is the prismatic light exit facet, the liquid of dotted line for filling; θ 0～θ 5 for light at the going into of each interface, refraction angle.Two light and shade visual fields that rear " bright " " secretly " loop graph represents that detector receives and boundary line.
Embodiment
Liquid prism refractometer of the present invention comprises the prism 5 of a monochromatic source 1, hollow and the transparent material that light receiving element 6. hollow prisms 5 adopt the restriction of no refractive index size, light entrance face 2 outsides are polished into hair side, and its light entrance face 2 and exit facet 3 angles equal 60 °, upper bottom surface 4 has a removable cover, be used for canned and pouring liquid, when liquid charges into, promptly constitute a liquid prism.
Monochromatic light incident forms omniranges at the plane of incidence 2 of prism 5 and diffuses.After the liquid prism refraction, be divided into two districts of light and shade at prism exit facet 3 rears as the visual field, by the position of light receiving element measurement bright-dark cut, utilize the glancing incidence method to measure the refractive index formula and can derive liquid refractivity.Can further obtain respective liquid concentration, density value by the refractive index of measuring.
Specific embodiment 1, with two solid prisms in the replacement of the liquid prism among the present invention Abbe refractometer, rear light receiving element 6 is the structures such as reading telescope of Abbe refractometer, constitutes visual liquid prism refractometer.
Claims (3)
1. a liquid prism refractometer is characterized in that this refractometer comprises the prism (5) and the light receiving element (6) of a monochromatic source (1), hollow.Hollow prism (5) light entrance face (2) and exit facet (3) angle equal 60 °, and the upper bottom surface (4) of hollow prism (5) has a removable cover, is used for canned and pouring liquid; When liquid charges into, promptly constitute a liquid prism, utilize glancing incidence method measuring principle can record the refractive index of testing liquid.
2. liquid prism refractometer according to claim 1 is characterized in that light entrance face (2) outside of described hollow prism is polished into hair side.
3. liquid prism refractometer according to claim 1 is characterized in that the prism (5) of hollow adopts the big or small transparent material that limits of no refractive index.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910234508A CN101706425A (en) | 2009-11-20 | 2009-11-20 | Liquid prism refractometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910234508A CN101706425A (en) | 2009-11-20 | 2009-11-20 | Liquid prism refractometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101706425A true CN101706425A (en) | 2010-05-12 |
Family
ID=42376663
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910234508A Pending CN101706425A (en) | 2009-11-20 | 2009-11-20 | Liquid prism refractometer |
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|---|---|
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106970045A (en) * | 2017-05-31 | 2017-07-21 | 华中科技大学 | A kind of transmission-type coating substances apparatus for measuring refractive index |
| CN106979907A (en) * | 2017-04-11 | 2017-07-25 | 南京邮电大学 | A kind of digital liquid refraction by prism instrument based on line array CCD |
| CN108507980A (en) * | 2018-06-05 | 2018-09-07 | 莆田市烛火信息技术有限公司 | A kind of household self-control beverage concentration control method |
| CN108507978A (en) * | 2018-05-29 | 2018-09-07 | 莆田市烛火信息技术有限公司 | A kind of household self-control beverage concentration measuring apparatus |
| CN108593599A (en) * | 2018-05-29 | 2018-09-28 | 莆田市烛火信息技术有限公司 | A kind of brine for kitchen use, syrup concentration measure Intelligent water cup |
| CN108732131A (en) * | 2018-05-29 | 2018-11-02 | 莆田市烛火信息技术有限公司 | A kind of household self-control beverage concentration measuring method |
| CN108918464A (en) * | 2018-05-29 | 2018-11-30 | 莆田市烛火信息技术有限公司 | A kind of salt water based on Intelligent water cup for kitchen use, syrup concentration regulate and control method |
| CN109906380A (en) * | 2016-10-26 | 2019-06-18 | 福斯油品欧洲股份公司 | For analyzing sample recep element, analytic unit and the method for liquid, especially cooling and lubricating agent emulsion |
| CN110455745A (en) * | 2019-09-02 | 2019-11-15 | 华南师范大学 | A kind of method and its application measuring liquid refractivity dispersion |
| CN111272702A (en) * | 2020-03-18 | 2020-06-12 | 山东非金属材料研究所 | Abbe refractometer standard block and its setting method |
| JP2020531822A (en) * | 2017-08-21 | 2020-11-05 | 東京エレクトロン株式会社 | Optical sensor for phase determination |
| CN114384046A (en) * | 2020-10-02 | 2022-04-22 | 帕尔公司 | Refractometer with disposable prism and reusable optical system |
| CN116990260A (en) * | 2023-09-27 | 2023-11-03 | 长春电子科技学院 | Alcohol concentration measuring method |
-
2009
- 2009-11-20 CN CN200910234508A patent/CN101706425A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109906380A (en) * | 2016-10-26 | 2019-06-18 | 福斯油品欧洲股份公司 | For analyzing sample recep element, analytic unit and the method for liquid, especially cooling and lubricating agent emulsion |
| CN106979907A (en) * | 2017-04-11 | 2017-07-25 | 南京邮电大学 | A kind of digital liquid refraction by prism instrument based on line array CCD |
| CN106970045A (en) * | 2017-05-31 | 2017-07-21 | 华中科技大学 | A kind of transmission-type coating substances apparatus for measuring refractive index |
| JP2020531822A (en) * | 2017-08-21 | 2020-11-05 | 東京エレクトロン株式会社 | Optical sensor for phase determination |
| JP7212988B2 (en) | 2017-08-21 | 2023-01-26 | 東京エレクトロン株式会社 | Optical sensor for phase determination |
| CN108507978A (en) * | 2018-05-29 | 2018-09-07 | 莆田市烛火信息技术有限公司 | A kind of household self-control beverage concentration measuring apparatus |
| CN108593599A (en) * | 2018-05-29 | 2018-09-28 | 莆田市烛火信息技术有限公司 | A kind of brine for kitchen use, syrup concentration measure Intelligent water cup |
| CN108732131A (en) * | 2018-05-29 | 2018-11-02 | 莆田市烛火信息技术有限公司 | A kind of household self-control beverage concentration measuring method |
| CN108918464A (en) * | 2018-05-29 | 2018-11-30 | 莆田市烛火信息技术有限公司 | A kind of salt water based on Intelligent water cup for kitchen use, syrup concentration regulate and control method |
| CN108507980A (en) * | 2018-06-05 | 2018-09-07 | 莆田市烛火信息技术有限公司 | A kind of household self-control beverage concentration control method |
| CN108507980B (en) * | 2018-06-05 | 2020-09-11 | 莆田市烛火信息技术有限公司 | Concentration control method for household self-made drink |
| CN110455745A (en) * | 2019-09-02 | 2019-11-15 | 华南师范大学 | A kind of method and its application measuring liquid refractivity dispersion |
| CN110455745B (en) * | 2019-09-02 | 2022-05-10 | 华南师范大学 | Method for measuring liquid refractive index dispersion and application thereof |
| CN111272702A (en) * | 2020-03-18 | 2020-06-12 | 山东非金属材料研究所 | Abbe refractometer standard block and its setting method |
| CN114384046A (en) * | 2020-10-02 | 2022-04-22 | 帕尔公司 | Refractometer with disposable prism and reusable optical system |
| CN116990260A (en) * | 2023-09-27 | 2023-11-03 | 长春电子科技学院 | Alcohol concentration measuring method |
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Open date: 20100512 |