CN206684040U - A kind of device for measuring parallel plate refractive index - Google Patents
A kind of device for measuring parallel plate refractive index Download PDFInfo
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- CN206684040U CN206684040U CN201720409971.0U CN201720409971U CN206684040U CN 206684040 U CN206684040 U CN 206684040U CN 201720409971 U CN201720409971 U CN 201720409971U CN 206684040 U CN206684040 U CN 206684040U
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- rectangular flat
- octagon
- flat board
- refractive index
- glass sheet
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Abstract
It the utility model is related to a kind of device for measuring parallel plate refractive index, including measuring table, glass sheet sample folder, laser pen and transparent ruler receiving screen；The measuring table is made up of 1 piece of rectangular flat and 1 piece of octagon flat board, and octagon flat board is fitted in rectangular flat upper surface；Glass sheet sample is located on the rectangular flat away from octagon flat board side, and can ensure that the glass sheet sample folded by it is parallel with rectangular flat horizontal edge；Laser pen and transparent ruler receiving screen are separately positioned on the both sides of glass sheet sample folder, and are correspondingly close on the outside of a hypotenuse of octagon flat board.The utility model making is simple and convenient to operate, measurement accuracy is high, and can realize non-cpntact measurement, particularly suitable for being used in school instruction or experimentation.
Description
Technical field
It the utility model is related to a kind of teaching aid or experimental provision, more particularly to a kind of device for measuring glass plate refractive index.
Background technology
In the teaching of school or experimentation, it is often necessary to determine the refractive index of parallel plate, but at present except
It can only be measured outside professional measuring instrument using homemade interim measurement instrument, professional measuring instrument is expensive, is unsuitable for
Used in school；Interim measurement instrument precision cannot be guaranteed, and can not preserve for a long time；Therefore, it is flat to lack a kind of special measurement
The Simple measurement device of row glass plate refractive index.
The content of the invention
The utility model provides a kind of device for measuring parallel plate refractive index, and its making is simple and convenient to operate, surveyed
Accuracy of measurement is high, and can realize non-cpntact measurement, particularly suitable for being used in school instruction or experimentation.
In order to achieve the above object, the utility model is realized using following technical scheme：
A kind of device for measuring parallel plate refractive index, including measuring table, glass sheet sample folder, laser pen and transparent
Ruler receiving screen；The measuring table is made up of 1 piece of rectangular flat and 1 piece of octagon flat board, and octagon flat board is fitted in rectangle
Flat board upper surface；Octagon flat board is respectively first at~the eight, wherein the first side and rectangular flat in the direction of the clock
Horizontal edge is coplanar, and the second side is parallel with the longitudinal edge of rectangular flat, and the 3rd side and rectangular flat horizontal edge angle are 45 °, the 4th side and square
The angle of shape flat board horizontal edge is 30 °, and the 5th side is parallel with rectangular flat horizontal edge, and the 6th side is parallel with the longitudinal edge of rectangular flat, the
Seven sides and the angle of rectangular flat horizontal edge are 60 °, and the 8th side and the angle of rectangular flat horizontal edge are 45 °；Glass sheet sample sandwiched
In on the rectangular flat away from octagon flat board side, and it can ensure that the glass sheet sample folded by it is put down with rectangular flat horizontal edge
OK；Laser pen and transparent ruler receiving screen are separately positioned on the both sides of glass sheet sample folder, and are correspondingly close in octagon flat board
A hypotenuse on the outside of.
Rectangular flat and the octagon flat board is made using acrylic board.
The rectangular flat is shaped as square；Octagon flat board is made using square plate, wherein the first side, the
Two while, the 5th while with the 6th side be square plate primary side.
The laser pen is fixed by laser penholder and supported.
The transparent ruler receiving screen is made up of transparent ruler and blank sheet of paper, and blank sheet of paper is attached to the back side of transparent ruler.
Compared with prior art, the beneficial effects of the utility model are：
Making is simple and convenient to operate, measurement accuracy is high, and can realize non-cpntact measurement, particularly suitable for school instruction or
Used in experimentation.
Brief description of the drawings
Fig. 1 is a kind of structural representation of device for measuring parallel plate refractive index described in the utility model.
Fig. 2 is a kind of schematic diagram of device for measuring parallel plate refractive index described in the utility model.
Fig. 3 is the design drawing of octagon flat board in embodiment.
In figure：1. the glass sheet sample of 2. octagon flat board of rectangular flat 3. presss from both sides the laser pen 6. of 4. glass sheet sample 5.
The transparent ruler receiving screen of laser penholder 7.
Embodiment
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of device for measuring parallel plate refractive index described in the utility model, including measuring table,
Glass sheet sample folder 3, laser pen 5 and transparent ruler receiving screen 7；The measuring table is by 1 piece of rectangular flat 1 and 1 piece of octagon
Flat board 2 forms, and octagon flat board 2 is fitted in the upper surface of rectangular flat 1；Octagon flat board 2 is respectively first in the direction of the clock
At~the eight, wherein the first side and the horizontal edge of rectangular flat 1 are coplanar, the second side is parallel with the longitudinal edge of rectangular flat 1, the 3rd side
It it is 45 ° with the horizontal edge angle of rectangular flat 1, the 4th side and the angle of the horizontal edge of rectangular flat 1 are 30 °, and the 5th side is horizontal with rectangular flat 1
Side is parallel, and the 6th side is parallel with the longitudinal edge of rectangular flat 1, and the angle of the 7th side and the horizontal edge of rectangular flat 1 is 60 °, the 8th side with
The angle of the horizontal edge of rectangular flat 1 is 45 °；Glass sheet sample folder 3 is disposed far from the rectangular flat 1 of the side of octagon flat board 2, and
It can ensure that the glass sheet sample 4 folded by it is parallel with the horizontal edge of rectangular flat 1；Laser pen 5 and transparent ruler receiving screen 7 are set respectively
Put in the both sides of glass sheet sample folder 3, and be correspondingly close on the outside of a hypotenuse of octagon flat board 2.
The rectangular flat 1 and octagon flat board 2 are made using acrylic board.
The rectangular flat 1 is shaped as square；Octagon flat board 2 is made using square plate, wherein the first side,
Second while, the 5th while with the 6th side be square plate primary side.
The laser pen 5 is fixed by laser penholder 6 and supported.
The transparent ruler receiving screen 7 is made up of transparent ruler and blank sheet of paper, and blank sheet of paper is attached to the back side of transparent ruler.
It is described in the utility model it is a kind of measure parallel plate refractive index device cleverly make use of one it is irregular
Octagon flat board 2, its each bar side geometry at an angle to each other can quickly determine incident light (laser pen) direction and reflection
The position of light-receiving screen (transparent ruler receiving screen), it can quickly determine that glass sheet sample 4 puts position using glass sheet sample folder 3
Put；Therefore operation very simple is convenient.
Laser pen 5 is used as incident light source, and its incident light is radiated in glass sheet sample 4 at a certain angle；Transparent ruler connects
Receive screen 7 and be used as hot spot receiving screen, can intuitively show the position of the 2 reflected light hot spots reflected from glass sheet sample 4, it is convenient
Measure the distance between 2 reflected lights.Parallel plate refractive index can rapidly and accurately be measured using the utility model, also
The non-cpntact measurement of parallel plate refractive index and thickness can be realized.
A kind of design principle of device for measuring parallel plate refractive index described in the utility model is as follows：
Based on the optical law of refraction and reflection law, spatial angle measuring is converted into the linear measure longimetry of plane, to carry
High measurement accuracy and operability.
As shown in Fig. 2 obtained by the law of refraction：
n1sinθ1=n sin θs2,
Wherein, θ1, θ2It is incidence angle and refraction angle respectively,
n1, n is the refractive index of air refraction and glass sheet sample to be measured respectively.
Obtained by geometrical relationship in Fig. 2 following various：
D=Lcos θ1
In formula, L is the distance between 2 eye points, and D is the vertical range between 2 reflection lights, and d is glass plate sample
The thickness of product 4.
Following examples are implemented under premised on technical solutions of the utility model, give detailed embodiment
With specific operating process, but the scope of protection of the utility model is not limited to following embodiments.Side used in following embodiments
Method is conventional method unless otherwise instructed.
【Embodiment】
In the present embodiment, as shown in figure 3, octagon flat board 2 uses one piece of square acrylic board, two of which side opposite the angle
Retain, two other side opposite the angle is angularly cut respectively, obtains the octagon with special angle, and its specific size is as schemed
Shown in 3；To ensure the accuracy of measurement result, reduce systematic error, octagon flat board 2 is cut using Computerized laser.
After octagon flat board 2 completes, it is bonded to i.e. composition measuring table with one piece of square acrylic board.
Articles for use during measurement：Laser pen 5 (green glow, 532 ± 10nm), glass sheet sample folder 3, glass sheet sample to be measured 4, survey
Platform, transparent ruler receiving screen 7, laser penholder 6 each 1 are measured, has slide measure (precision 0.05mm, for measuring in addition
The distance between glass sheet sample thickness and 2 flares), filter goggle (is used to go noise to make flare scope more smart
Standard, and being capable of protection person eyes), blank sheet of paper and pencil.
Measuring method and process：The focusing of laser pen 5 makes to its light is most thin and position is placed on laser pen as shown in Figure 1 first
On frame 6, then glass sheet sample 4 to be measured is fixed on glass sheet sample folder 3；Open laser pen 5 to switch, laser pen 5 projects
Light directive glass sheet sample 4,2 parallel rays of its 2 parallel surfaces reflection are refracted to shape on transparent ruler receiving screen 7
Into 2 hot spots, the position for describing hot spot point on the blank sheet of paper that the transparent back side of ruler receiving screen 7 is pasted with pencil (also can directly lead to
Scaleover chi reading).
In order to ensure the accuracy of measurement, it is desirable to which hot spot point is the smaller the better, therefore gauger will wear filter goggle, described point
Tip of a pencil is thin, and the hot spot point of record can not be more than actual hot spot point.Afterwards 2 hot spot points (i.e. 2 are measured with slide measure
The distance between parallel reflection light), and measure the thickness of glass sheet sample 4 to be measured.
Above measurement process repeatedly, respectively by group record data, calculates, i.e., further according to the law of refraction and geometrical relationship
The refractive index of glass to be measured can be obtained.
To ensure the accurate of measurement, 2 kinds of incidence angles, i.e. 45o are respectively adopted to the glass sheet sample 4 of different-thickness in experiment
And 60o；I.e. laser pen 5 is close to respectively has the side at 45° angle and 30 ° of angles (the 3rd side and the 4th in the side of octagon flat board 2
Side) ground is corresponded, transparent ruler receiving screen 7 is close to the side the (the 8th in the side of opposite side 45° angle and 60 ° of angles respectively
While with the 7th).
In the present embodiment, 10 groups of data are obtained after measuring respectively, the refractometry data result of glass sheet sample 4 is shown in Table
One：
Table one
Measurement result is analyzed：
1) experimental result uncertainty：
(1) A classes uncertainty：0.019；
(2) B classes uncertainty：Influenceed mainly due to spot size, make the inaccuracy of hot spot distance measurement, the light of measurement
Spot dimension 0.10-0.30mm, Δ D=0.10mm is taken, the uncertainty that impact of refractive index measurement influences is about 0.069.
(3) Composite Seismogram:0.072；
2) experimental measurements：N=1.531 ± 0.072；
3) measurement result contrasts：Measured glass sheet sample is that zinc for building is preced with glass, and its refractive index is 1.517；Then originally
The measurement percent error of embodiment is 1%
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art is in the technical scope that the utility model discloses, according to this practicality
New technical scheme and its design is subject to equivalent substitution or change, should all cover within the scope of protection of the utility model.
Claims (5)
1. a kind of device for measuring parallel plate refractive index, it is characterised in that including measuring table, glass sheet sample folder, swash
Light pen and transparent ruler receiving screen；The measuring table is made up of 1 piece of rectangular flat and 1 piece of octagon flat board, octagon flat board
It is fitted in rectangular flat upper surface；Octagon flat board be respectively in the direction of the clock first at~the eight, wherein the first side with
The horizontal edge of rectangular flat is coplanar, and the second side is parallel with the longitudinal edge of rectangular flat, and the 3rd side and rectangular flat horizontal edge angle are 45 °,
The angle of 4th side and rectangular flat horizontal edge is 30 °, and the 5th side is parallel with rectangular flat horizontal edge, and the 6th side and rectangular flat are indulged
Side is parallel, and the 7th side and the angle of rectangular flat horizontal edge are 60 °, and the 8th side and the angle of rectangular flat horizontal edge are 45 °；Glass plate
Specimen holder is disposed far from the rectangular flat of octagon flat board side, and can ensure that the glass sheet sample folded by it is put down with rectangle
Plate horizontal edge is parallel；Laser pen and transparent ruler receiving screen are separately positioned on the both sides of glass sheet sample folder, and are correspondingly close to eight
On the outside of one hypotenuse of side shape flat board.
2. a kind of device for measuring parallel plate refractive index according to claim 1, it is characterised in that the rectangle is put down
Plate and octagon flat board are made using acrylic board.
3. a kind of device for measuring parallel plate refractive index according to claim 1, it is characterised in that the rectangle is put down
Plate is shaped as square；Octagon flat board using square plate make, wherein first while, second while, the 5th side and the 6th
Side is the primary side of square plate.
A kind of 4. device for measuring parallel plate refractive index according to claim 1, it is characterised in that the laser pen
Fixed and supported by laser penholder.
5. a kind of device for measuring parallel plate refractive index according to claim 1, it is characterised in that described transparent straight
Chi receiving screen is made up of transparent ruler and blank sheet of paper, and blank sheet of paper is attached to the back side of transparent ruler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720409971.0U CN206684040U (en) | 2017-04-19 | 2017-04-19 | A kind of device for measuring parallel plate refractive index |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720409971.0U CN206684040U (en) | 2017-04-19 | 2017-04-19 | A kind of device for measuring parallel plate refractive index |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206684040U true CN206684040U (en) | 2017-11-28 |
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ID=60403515
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720409971.0U Expired - Fee Related CN206684040U (en) | 2017-04-19 | 2017-04-19 | A kind of device for measuring parallel plate refractive index |
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| CN (1) | CN206684040U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686207A (en) * | 2019-01-31 | 2019-04-26 | 翁琦欣 | A kind of experimental provision of high school physics measurement glass refraction |
-
2017
- 2017-04-19 CN CN201720409971.0U patent/CN206684040U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686207A (en) * | 2019-01-31 | 2019-04-26 | 翁琦欣 | A kind of experimental provision of high school physics measurement glass refraction |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171128 Termination date: 20190419 |
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| CF01 | Termination of patent right due to non-payment of annual fee |