CN102830089A - Liquid refractive index measuring device with optical gratings - Google Patents
Liquid refractive index measuring device with optical gratings Download PDFInfo
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- CN102830089A CN102830089A CN 201110162842 CN201110162842A CN102830089A CN 102830089 A CN102830089 A CN 102830089A CN 201110162842 CN201110162842 CN 201110162842 CN 201110162842 A CN201110162842 A CN 201110162842A CN 102830089 A CN102830089 A CN 102830089A
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- vessel
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- refractive index
- diffraction
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Abstract
The invention relates to a liquid refractive index measuring device with optical gratings. The device is composed of a semi-cylindrical vessel manufactured by using transparent optical glass, and a vessel cap matching the vessel. Diffraction gratings are engraved along a vertical direction on a diametric plane of the semi-cylindrical vessel. A through hole is provided on the vessel cap, and is used for injecting liquid requiring measuring into the vessel, or for inserting tools such as a thermometer. The device is placed on a spectrometer object stage; the diametric plane engraved with the diffraction gratings is positioned at a diameter marking at the center of the object stage; and same-level diffraction angles after incoming monochromatic lights vertically irradiated on the optical gratings are subjected to grating diffraction are respectively measured when no liquid is in the vessel and when the liquid requiring measuring is placed in the vessel, such that the refractive index of the liquid requiring measuring can be determined precisely. The device provided by the invention is advantaged in simple structure, novel method, convenient operation, and high measuring precision.
Description
Technical field
The present invention relates to a kind of measurement mechanism of material refractive index, especially a kind of measuring refractive indexes of liquid device of grating belt.
Background technology
Refractive index is an important physical parameter of reflection optical properties of materials.The measuring method of liquid refractivity has multiple, method commonly used be with a branch of smooth oblique fire to liquid surface, through measuring incident angle and refraction angle, utilize refraction law to calculate liquid refractive index again.This method is often accurate inadequately when taking measurement of an angle, and brings error for the measurement of refractive index.The Abbe refractive index measuring instrument that another kind of basis is plunderred the design of face incident method can reach higher measuring accuracy; But this apparatus structure is complicated; Price is more expensive, and owing to measure according to total reflection principle, the refractive index of its used prism has limited the scope of its institute's energy measurement.
Summary of the invention
The object of the present invention is to provide a kind of simple in structure, easy to operate, the device that can accurately measure various liquid refractivities.
In order to solve the problems of the technologies described above; The present invention provides a kind of measuring refractive indexes of liquid device of grating belt; This device is made up of a half-cylindrical container and a supporting with it container cover of processing with clear optical glass; Vertically be carved with diffraction grating on the diametral plane of half-cylindrical container, can put into testing liquid in the container; One through hole is arranged on the container cover, be used in container, injecting instruments such as testing liquid or insertion thermometer.
During actual measurement; This device is placed on the spectrometer objective table, the diametral plane that is carved with diffraction grating is positioned on the diameter graticule of objective table central authorities, with monochromatic collimated beam vertical irradiation diametral plane; Measure respectively when not putting into testing liquid and container in the container and put into testing liquid; The at the same level angle of diffraction of the monochromatic light of vertical incidence grating behind optical grating diffraction, then before and after the ratio of sine function of twice angle of diffraction, be the refractive index of testing liquid.
Measuring principle is following: establishing grating constant is d, and wavelength and the k order diffraction angle of optical grating diffraction of light in air and testing liquid is respectively λ
1, θ
1And λ
2, θ
2, then by grating equation: dsin θ
1=k λ
1, dsin θ
2=k λ
2, the refractive index that can get testing liquid is:
The present invention has utilized spectrometer to come accurately to take measurement of an angle, thereby has accurately measured liquid refractive index owing to adopt above-mentioned design, and it is simple in structure, and method is novel, and is easy to operate, and measuring accuracy is high.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further.
Fig. 1 is the structural representation of the measuring refractive indexes of liquid device of a kind of grating belt of the present invention.
Fig. 2 is an instrumentation plan of measuring liquid refractivity with device according to the invention.
Among the figure: 1. half-cylindrical container, 2. diametral plane, 3. diffraction grating, 4. container cover is 5. handled knob, 6. through hole, 7. spectrometer objective table, 8. objective table diameter graticule, 9. parallel light tube, 10. telescope.
Embodiment
As shown in Figure 1, the half-cylindrical container of hollow 1 is processed by clear optical glass, vertically is carved with diffraction grating 3 on the diametral plane 2 of container 1, and container 1 has supporting container cover 4, and 5 and one through hole 6 of handling knob is arranged on the container cover 4.When measuring the liquid of pungency liquid, toxic liquid or volatilization easily, can container cover 4 be covered on container 1, in container 1, inject instruments such as testing liquid or insertion thermometer through through hole 6.
As shown in Figure 2, during actual measurement, half-cylindrical container 1 is placed on the objective table 7 of the spectrometer of adjusting, the diametral plane 2 of container 1 is positioned on the objective table diameter graticule 8, and vertical with parallel light tube 9.Grating 3 on the monochromatic collimated beam vertical irradiation diametral plane that this moment, parallel light tube 9 sent also produces optical grating diffraction.When being unkitted liquid in the container 1, measure the first order diffraction angle of optical grating diffraction
1After in container 1, injecting testing liquid, measure the first order diffraction angle of optical grating diffraction again
2Then the refractive index of testing liquid is
Also can measure the second level of optical grating diffraction or more senior time angle of diffraction in the experiment, computing formula is constant, but before and after should guaranteeing twice measurement be at the same level time angle of diffraction.
Claims (2)
1. the measuring refractive indexes of liquid device of a grating belt; Form by a half-cylindrical container (1) of processing with clear optical glass and supporting with it container cover (3), it is characterized in that: vertically be carved with diffraction grating (3) on the diametral plane (2) of half-cylindrical container (1).
2. the measuring refractive indexes of liquid device of a kind of grating belt according to claim 1 is characterized in that: a through hole (6) is arranged on the container cover (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110162842 CN102830089A (en) | 2011-06-16 | 2011-06-16 | Liquid refractive index measuring device with optical gratings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110162842 CN102830089A (en) | 2011-06-16 | 2011-06-16 | Liquid refractive index measuring device with optical gratings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102830089A true CN102830089A (en) | 2012-12-19 |
Family
ID=47333301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110162842 Pending CN102830089A (en) | 2011-06-16 | 2011-06-16 | Liquid refractive index measuring device with optical gratings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102830089A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507979A (en) * | 2018-05-29 | 2018-09-07 | 莆田市烛火信息技术有限公司 | A kind of brine, syrup concentration assay method based on Intelligent water cup for kitchen use |
| CN111033233A (en) * | 2017-09-14 | 2020-04-17 | 株式会社岛津制作所 | Refractive index measuring device and cell for refractive index measuring device |
-
2011
- 2011-06-16 CN CN 201110162842 patent/CN102830089A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111033233A (en) * | 2017-09-14 | 2020-04-17 | 株式会社岛津制作所 | Refractive index measuring device and cell for refractive index measuring device |
| CN108507979A (en) * | 2018-05-29 | 2018-09-07 | 莆田市烛火信息技术有限公司 | A kind of brine, syrup concentration assay method based on Intelligent water cup for kitchen use |
| CN108507979B (en) * | 2018-05-29 | 2020-11-24 | 义乌兰思体育用品有限公司 | Method for measuring concentration of saline water and sugar water based on intelligent water cup for kitchen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121219 |