CN206040035U - Experimental device for with spectrometer survey newton rings camber - Google Patents
Experimental device for with spectrometer survey newton rings camber Download PDFInfo
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- CN206040035U CN206040035U CN201520995800.1U CN201520995800U CN206040035U CN 206040035 U CN206040035 U CN 206040035U CN 201520995800 U CN201520995800 U CN 201520995800U CN 206040035 U CN206040035 U CN 206040035U
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- spectrometer
- newton
- spectroscope
- ring
- newton rings
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Abstract
The utility model discloses an experimental device for with spectrometer survey newton rings camber, include that the telescope system redesign with the spectrometer becomes microscopic system, place traditional newton rings appearance on spectrometer cargo platform, the collimator that the monochromatic point source passes through the spectrometer obtains monochromatic parallel light, and monochromatic parallel light shines on the curvature radius's that awaits measuring the newton rings experimental apparatus. The telescope system redesign of spectrometer can survey transmission and reflection interference ring after becoming microscopic system on the spectrometer, consequently the first time realized can surveing the experiment of newton rings camber with the spectrometer, the utility model discloses the telescope system who only changes the spectrometer is microscopic system, has utilized the precision measurement system of spectrometer to come the experimental apparatus as survey newton rings camber, and is simple to use convenient, can let the transmission of the understanding newton rings appearance that the user is better and reflection interference encircle, has formed the new integrated design nature experiment of spectrometer, brings more knowledge and experience for the user.
Description
Technical field
This utility model is related to testing equipment technical field, more particularly to a kind of reality for determining Newton's ring curvature with spectroscope
Experiment device.
Background technology
Newton's ring is also known as " Newton's ring ".Optically, Newton's ring is a film interference phenomenon.It is that newton is first in 1675
First it was observed that.One piece of larger planoconvex lens of radius of curvature is placed on one block of glass plate, with monochromatic light exposure lens with
Glass plate, it is possible to it was observed that some light and dark donuts.Annulus distribution is that middle thin, edge is close, and the center of circle is in contact
Point O.The Newton's ring center seen from reflected light is dark, and the Newton's ring center seen from transmitted light is bright.A kind of light it is dry
Relate to pattern.It is that newton was initially observed in 1675.One piece of larger planoconvex lens of radius of curvature is placed on one block of glass to put down
On plate, with monochromatic light exposure lens and glass plate, it is possible to it was observed that some light and dark donuts.During annulus distribution is
Between dredge, edge it is close, the center of circle is in contact point O.The Newton's ring center seen from reflected light is dark, from the Newton's ring that transmitted light is seen
Center is bright.If incident with white light. it will be observed that colored annulus.Newton's ring is typical uniform thickness film interference.Convex lenss
The round wedge shape air film of a thickness even variation is formed between convex spherical and glass plate, when the vertical directive of directional light is put down
During convex lenss, it is overlapped mutually from the two-beam of the upper and lower surface reflection of wedge shape air film and produces interference.With the annulus of Radius
Place's air film thickness is identical, and upper and lower surface reflection path difference is identical, therefore makes interference pattern in annular shape.It is this by same thickness
Degree thin film produces the interference of same interference fringe and is referred to as equal thickness interference.
Newton one in optics is important to find to be exactly " Newton's ring ".This is him in the fertilizer for further investigating Hooke research
Put forward during the color problem of soap bubble thin film.
After spectroscope is the more familiar instrument of science students, plus a self-control adnexa, experiment is changed on spectroscope
Do, the adjustment of instrument becomes very convenient.Newton's ring curvature is measured using spectroscope, using the Return Law or graphing method processing data,
Can obtain.When relatively filling remaining when laboratory, student can be allowed to observe projection and reflected light generation interference fringe on spectroscope.
Existing EXPERIMENT OF NEWTON ' S instrument can be accomplished to test Newton's ring well, Accurate Determining Newton's ring curvature, but not have
Newton's ring is tested on spectroscope, Accurate Determining Newton's ring curvature brings many inconvenience to user.This practicality is new
Type solves on spectroscope to test Newton's ring first.
Utility model content
The purpose of this utility model is to solve to deposit in the experimental provision prior art of spectroscope measure Newton's ring curvature
Shortcoming, and propose a kind of measure Newton's ring curvature experimental provision.
To achieve these goals, this utility model employs following technical scheme：
A kind of experimental provision for determining Newton's ring curvature with spectroscope, including spectroscope, the spectroscope includes spectroscope
Article carrying platform, Newton's ring instrument and sheet glass G, are placed with Newton's ring instrument on the spectroscope article carrying platform, the Newton's ring instrument
Upside is placed with sheet glass G, and the both sides of the spectroscope are placed with spectroscope telescopic system T, and by spectroscope telescope system
System T is re-designed as microscopic system, and the side of the Newton's ring instrument G is placed with collimator L, the collimator L away from
The side of Newton's ring instrument G is placed with monochromater device S, and monochromater device S is parallel with collimator L, the monochromatic light
The light source point of source device S is located on a horizontal plane with collimator L, and the side of the spectroscope is provided with expansion light source device.
Preferably, the side of the spectroscope telescopic system T is provided with convex lenss, and sets the focal length f=of convex lenss
10.00cm。
Preferably, the height of the sheet glass G and angle of inclination are from the horizontal by 45° angle.
In this utility model, by being tested using a light source, selectivity experiment, side can be user-friendly for
Just user is carried out to experiment, by being tested using spectrometer, can accomplish more preferable experiment effect so that user
More preferable experimental result can be obtained, experiment is user-friendly for, while this utility model is using simply, simple operation can
To be supplied to the more preferable experimentation of user one.
During telescopic system observation interference ring after being reequiped with spectrometer, there is the formula to be
Had by above formula：
Make sin on rectangular coordinate paper2θm～m relation curves, calculate from the slope of straight lineAs λ=589.3nm, can
Obtain R.Graphing method can not typically provide error, can be with the Return Law come processing data.M is regarded as into independent variable, equivalent to xi, and
sin2θmEquivalent to yi, by xiAnd yiValue list and calculate on request.
For trying to achieve radius of curvature R and its deviation, first regression equation must be tried to achieve with the Return Law
Y=a+bx
(7-12)
Coefficient a, b, make y=sin here2θm, x=m, slope is
By principle of least square method, coefficient a, b to be made to meet formula y=a+bx, and have optimum, then be neededMinimum, to a, b seeks partial derivative
(7-14) formula of arrangement is obtained：
Correlation coefficient
In the case of systematic error is less, adopting said method processing data, accurately can estimate measure when introduce it is accidental
Error, so that the value surveyed is more accurate.
When lens radius of curvature is determined with transmitted light method, determine the basic point and focal length of telescope first with nodal slide, if
The focal length f=10.00cm of convex lenss, will be designed as one it is observed that the optical system of interference ring.By tampered telescope
Go to T2Position, adjusts Newton's ring, transparent glass sheet G, observes the interference ring that clearly transmitted light is formed, survey in telescope
Go out the Angle Position θ of interference ringm, have：
Known wavelength λ=589.3nm. obtains R values.
Description of the drawings
Fig. 1 be the utility model proposes it is a kind of with spectroscope determine Newton's ring curvature experimental provision Newton's ring instrument knot
Structure schematic diagram.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only this utility model a part of embodiment, rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of this utility model protection.
Reference Fig. 1, a kind of experimental provision for determining Newton's ring curvature with spectroscope, including spectroscope, the spectroscope bag
Spectroscope article carrying platform, Newton's ring instrument and sheet glass G is included, Newton's ring instrument, the cattle on the spectroscope article carrying platform, is placed with
It is placed with sheet glass G on the upside of ring instrument, the both sides of the spectroscope are placed with spectroscope telescopic system T, and by spectroscope
Telescopic system T is re-designed as microscopic system, and the side of the Newton's ring instrument G is placed with collimator L, described parallel
Light pipe L is placed with monochromater device S away from the side of Newton's ring instrument G, and monochromater device S is parallel with collimator L, institute
The light source point and collimator L for stating monochromater device S is located on a horizontal plane, and the side of the spectroscope is provided with extension light
Source device, the side of spectroscope telescopic system T are provided with convex lenss, and set the focal length f=10.00cm, sheet glass G of convex lenss
Height and angle of inclination be from the horizontal by 45° angle, when spectroscope telescopic system T goes to T2Position, adjusts Newton's ring
Instrument, sheet glass G, can observe interference ring in spectroscope telescopic system T, now measure the Angle Position θ of interference ringm, this reality
With new using simple and convenient, mode user is tested, and user can be allowed to be better understood by Newton's ring, while riper
The user of spectrometer is known, and more knowledge and experience is brought to user.
Operation principle：When the very big planoconvex lenss of a radius of curvature are contacted with a polishing flat glass plate, in lens
An annular air thin film (air splitter) is formed between convex surface and flat glass plate.It is identical from the equidistant local thickness of contact point,
Track Deng thick film is circle centered on contact point.If the collimated monochromatic ligth with wavelength as λ is impinged perpendicularly on this device,
Then will be interfered with each other by the light of the upper and lower two surfaces reflection of air film, form a series of concentric circular more and more close between bright, dark phases
Shape ring grain.
Job step：
1. instrument is installed, becoming directional light Jing after collimator L by the light that monochromater device sends (also can be without
Directional light and directly using expansion light source device) be irradiated on sheet glass G, make a part of light be reflected into newton by sheet glass G
Ring instrument.First observed in vertical direction with eyes, adjust height and angle of inclination (about from the horizontal by 45° angle) of sheet glass G,
The interference ring grain observed is made to be in lens center；
2. adjusting telescope makes which be directed at Newton's ring instrument, at this moment should occur yellow apparent visual field in telescope, move up and down
Lens barrel is focused to which, makes the ring grain seen as clear as possible, and carefully adjusts three screws on Newton's ring instrument, makes ring grain
Range of telescope central authorities are stably positioned in, Crape ring stricture of vagina are typically chosen during measurement and are measured, because dark stricture of vagina seems clearer, hoped
The cross hair of remote mirror is preferably adjusted at the center of tested ring grain；
3., during actual measurement, should select to interfere ring grain closeer and compare clearly partly to measure (to be typically chosen in
In the range of 10th ring to the 50th ring), first the center alignment ring grain center of cross hair, then make cross hair (or to the right) slowly to the left
It is mobile, while from the beginning of outer first ring grain of Center Dark Spot, counting ring grain number successively, can not miscounting, will otherwise resurvey, continue to move
Moving fork silk over Center Dark Spot to the right (or left side) to the first ring grain when, start ring of numbers stricture of vagina number again.Count to the 19th ring
During stricture of vagina, make cross hair tangent with the 19th ring grain, read corresponding reading on lower reading telescope and be further continued for making after being designated as cross hair to same
Move in one direction so as to tangent with the 20th, the the 21st ... the 29th ring grain, gradually write down reading corresponding with each ring grain, then can obtain respectively
The radius of Crape ring stricture of vagina；
4. make relation curve according to counted on rectangular coordinate paper, calculate from the slope of straight line, as λ=589.3nm,
R can be obtained；
5. graphing method can not typically provide error, can be with the Return Law come processing data.M is regarded as into independent variable, equivalent to, and
Equivalent to calculating the value list of sum and on request.If it should be noted that measurement when be to measure the 19th ring grain from the 29th ring, m's
Value is then to get 10. for trying to achieve radius of curvature R and its deviation from 1, first must try to achieve regression equation y=a with the Return Law0+a1x
Coefficient a0、a1, y=sin is made here2θm, x=m, slope is
The above, only this utility model preferably specific embodiment, but protection domain of the present utility model is not
Be confined to this, any those familiar with the art in the technical scope that this utility model is disclosed, according to this practicality
New technical scheme and its utility model design in addition equivalent or change, should all cover in protection model of the present utility model
Within enclosing.
Claims (3)
1. it is a kind of with spectroscope determine Newton's ring curvature experimental provision, including spectroscope, it is characterised in that the spectroscope bag
Spectroscope article carrying platform, Newton's ring instrument and sheet glass G is included, Newton's ring instrument, the cattle on the spectroscope article carrying platform, is placed with
It is placed with sheet glass G on the upside of ring instrument, the both sides of the spectroscope are placed with spectroscope telescopic system T, and by spectroscope
Telescopic system T is re-designed as microscopic system, and the side of the Newton's ring instrument G is placed with collimator L, the directional light
Pipe L is placed with monochromater device S away from the side of Newton's ring instrument G, and monochromater device S is parallel with collimator L, described
The light source point of monochromater device S is located on a horizontal plane with collimator L, and the side of the spectroscope is provided with expansion light source
Device.
2. according to claim 1 it is a kind of with spectroscope determine Newton's ring curvature experimental provision, it is characterised in that described point
The side of light instrument telescopic system T is provided with convex lenss, and sets the focal length f=10.00cm of convex lenss.
3. spectroscope determines the experimental provision of Newton's ring curvature according to claim 1, it is characterised in that the sheet glass G
Height and angle of inclination be from the horizontal by 45° angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520995800.1U CN206040035U (en) | 2015-12-04 | 2015-12-04 | Experimental device for with spectrometer survey newton rings camber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520995800.1U CN206040035U (en) | 2015-12-04 | 2015-12-04 | Experimental device for with spectrometer survey newton rings camber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206040035U true CN206040035U (en) | 2017-03-22 |
Family
ID=58311686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520995800.1U Expired - Fee Related CN206040035U (en) | 2015-12-04 | 2015-12-04 | Experimental device for with spectrometer survey newton rings camber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206040035U (en) |
-
2015
- 2015-12-04 CN CN201520995800.1U patent/CN206040035U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170322 Termination date: 20171204 |
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| CF01 | Termination of patent right due to non-payment of annual fee |