CN204740787U - Resolving power presentation device - Google Patents

Resolving power presentation device Download PDF

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Publication number
CN204740787U
CN204740787U CN201420849822.2U CN201420849822U CN204740787U CN 204740787 U CN204740787 U CN 204740787U CN 201420849822 U CN201420849822 U CN 201420849822U CN 204740787 U CN204740787 U CN 204740787U
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CN
China
Prior art keywords
light source
circular hole
diffraction screen
diffraction
screen
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Expired - Fee Related
Application number
CN201420849822.2U
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Chinese (zh)
Inventor
杨广武
叶丹
王翠红
朱飞
江越
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Tianjin Chengjian University
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Tianjin Chengjian University
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Priority to CN201420849822.2U priority Critical patent/CN204740787U/en
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Publication of CN204740787U publication Critical patent/CN204740787U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model provides a resolving power presentation device, the device's light source A dress is in sheath A, and the light that light source A sent is perpendicularly through the round hole A on the diffraction screen A, light source B dress is in sheath B, and the light that light source B sent is perpendicularly through the round hole B on the diffraction screen B, pointer A and pointer B directional divides maybe round hole A and round hole B's the centre of a circle, the guide rail is fixed on the upper portion of shell, can calculate round hole A and round hole B's interval through the scale label, the power is light source A and the power supply of light source B. The beneficial effects are that this presentation device can demonstrate circular hole diffraction and optical instrument resolving power's relevant content among the wave optics, the device compact structure, easy and simple to handle, the demonstration effect is obvious, easy observes easy the measurement, small in size, without external power supply, the device can be hand -carried, is applicable to in the teaching of physics theory course the classroom demonstration to little diffraction by aperture and the relevant content of optical instrument resolving power, through changing different types of diffraction screen, can demonstrate other contents of wave optics.

Description

Resolving power apparatus for demonstrating
Technical field
The utility model relates to a kind of apparatus for demonstrating, particularly a kind of resolving power apparatus for demonstrating.
Background technology
The diffraction phenomena of light is the main cause of restriction optical instrument resolving power, and its principle has introduction in " diffraction of light " part of College physics course.Existing demonstration instrument is with light illuminating two apertures, observe a long way off with telescope and whether can differentiate, this method is because use telescope, at every turn can only for people's viewing, can not supply full class student viewing when teacher explains, and the distance between aperture is fixed, not dynamic consecutive variations, in addition instrument is bulky, cannot take Theory Course one's parents demonstration to.
Summary of the invention
For the above-mentioned deficiency of prior art, the purpose of this utility model is to provide a kind of resolving power apparatus for demonstrating, this apparatus structure is compact, easy and simple to handle, demonstrating effect is obvious, easy observation is easily measured, compact, can demonstrate on any wall without screen, without external power supply, device can be carried with, and is applicable to the class demonstration to pinhole difiration and optical instrument resolving power related content in physical theory teaching, and can demonstrates other experiment contents of wave optics after changing different types of screen.
For achieving the above object, the technical solution adopted in the utility model is to provide a kind of resolving power apparatus for demonstrating, wherein: this device includes shell, light source A, sheath A, diffraction screen A is respectively equipped with, the circular hole B above the circular hole A above diffraction screen A, pointer A, support A, light source B, sheath B, diffraction screen B, diffraction screen B, pointer B, support B in shell; Be provided with guide rail above shell, in shell, be provided with power supply.
Described light source A is contained in sheath A, and the light that light source A sends is perpendicular through the circular hole A on diffraction screen A; Described light source B is contained in sheath B, and the light that light source B sends is perpendicular through the circular hole B on diffraction screen B; The sensing of described pointer A and pointer B is the center of circle of circular hole A and circular hole B respectively; Described guide rail is fixed on the top of shell, and guide rail is carved with scale; Described light source A, sheath A, diffraction screen A, pointer A become as a whole and laterally slide perpendicular to light emission direction on guide rail by exposing shell; Described light source B, sheath B, diffraction screen B, pointer B are integrally laterally slided perpendicular to light emission direction on guide rail by the support B exposing shell; The position of described circular hole A and circular hole B reads on scale by being separately fixed at pointer A on sheath A and sheath B and pointer B, and then can calculate the spacing of circular hole A and circular hole B; Described power supply connecting valve, wire, by fast light source A and light source B powers.
Effect of the present utility model is:
(1) can qualitative a, content demonstrating wave optics in Physics Course quantitatively: the resolving power of optical instrument.
(2) other experimental phenomenas of wave optics can be demonstrated by changing different types of diffraction screen.
(3) compact, teacher can carry with Theory Course classroom and carry out class demonstration.
(4) image projection is on screen or wall, can watch simultaneously for entirely withdrawing troops from the front to give birth to and study.
(5) miniature laser according to suitable power makes light source, can demonstrate in bright room, to demonstration condition without particular/special requirement.
Accompanying drawing explanation
Fig. 1 is the vertical view of the utility model apparatus for demonstrating;
Fig. 2 is the front elevation of the utility model apparatus for demonstrating;
Fig. 3 is the left view of the utility model apparatus for demonstrating;
Fig. 4 is the circular hole diffraction image schematic diagram of the utility model apparatus for demonstrating projection.
In figure:
1, light source A 2, sheath A 3, diffraction screen A
4, circular hole A 5, pointer A 6, support A
7, light source B 8, sheath B 9, diffraction screen B
10, circular hole B 11, pointer B 12, support B
13, guide rail 14, scale 15, power supply
16, switch 17, wire 18, shell
19, the speck 21 of screen 20, circular hole A diffraction, the speck of circular hole B diffraction
Embodiment
Resolving power apparatus for demonstrating structure of the present utility model is by reference to the accompanying drawings illustrated.
Resolving power apparatus for demonstrating design philosophy of the present utility model be in physics teaching or optics teaching for this content of the resolving power of optical instrument, design a small-sized, portable, successful, simple to operate, the experimental provision that can watch simultaneously for many people and study, for quantitative and qualitative analysis demonstration resolving power and related content.Existing device platform lamp as light source, volume is Portable belt more very much not, telescopic observation, can not watch for many people simultaneously, and pitch-row is fixing can not continuously adjustabe.The utility model can adopt small semiconductor laser to make light source, by powered battery, device volume significantly reduces, and light source and aperture pitch continuously adjustabe can be surveyed, can watch for many people in image projection to screen or wall, device picks up convenience, simple to operate, successful simultaneously.
Resolving power apparatus for demonstrating structure of the present utility model is, this device includes shell 18, light source A1, sheath A2, diffraction screen A3 is respectively equipped with, the circular hole B10 above the circular hole A4 above diffraction screen A, pointer A5, support A6, light source B7, sheath B8, diffraction screen B9, diffraction screen B, pointer B11, support B12 in shell 18; Be provided with guide rail 13 above shell 18, be provided with power supply 15 in shell 18 and go back handlebar image projection to the screen 19 on screen or wall.
Described light source A1 is contained in sheath A2, and the light sent is perpendicular through the circular hole A4 on diffraction screen A3; Described light source B7 is contained in sheath B8, and the light sent is perpendicular through the circular hole B10 on diffraction screen B9; Described sheath A2 and sheath B8 laterally can slide respectively by support A6 and support B12 on guide rail 13, and the position of described circular hole A4 and circular hole B10 reads on scale 14 respectively by pointer A5 and pointer B11, and then calculates the spacing of circular hole A4 and circular hole B10; Described power supply 15 by switch 16 and wire 17 by fast light source A1 and light source B7 powers; Described shell 18 plays support to device and protective effect; Described screen 19 is for receiving diffraction image.
The output voltage of described power supply 15 and power will match with light source A1 and light source B7, and power supply selects the transformer of battery or external lead wire.Light source A1 is identical with the necessary wavelength of the light that light source B7 sends, and is plane wave or almost plane ripple, meets far field construction condition, laser instrument can be used as light source, or uses ordinary light source to add that spherical wave is become plane wave by relevant optical.It is parallel to each other that described light source A1 and light source B7 sends two-beam line.It is vertical with guide rail 13 that described light source A1 and light source B7 send two-beam line.Described diffraction screen A3 is vertical with the direction of light source B7 luminescence with light source A1 with diffraction screen B9, and the light that light source A1 and light source B7 is sent is just by circular hole A4 and circular hole B10.
Described light source A1, sheath A2, diffraction screen A3, pointer A5 integrally laterally can be slided perpendicular to light emission direction by support A6 on guide rail 13; Light source B7, sheath B8, diffraction screen B9, pointer B11 integrally laterally can be slided perpendicular to light emission direction by support B12 on guide rail 13.
Described scale 14 is relative fixing with guide rail 13 position, the sensing of described pointer A5 and pointer B11 is the center of circle of circular hole A4 and circular hole B10 respectively, the lateral attitude reading circular hole A4 and circular hole B10 can be divided by pointer A5 and pointer B11 on scale 14, and then calculate the spacing of circular hole A4 and circular hole B10.
The parameter of described power supply 15 will match with light source A1 and light source B7.Institute's shell 18 only plays support and protective effect to device, and haveing nothing to do with the realization of function, is not necessary configuration.The light that described screen 19 sends perpendicular to light source A1 and light source B7, for receiving the pattern of circular hole A4 and circular hole B10 diffraction, described screen 19 can replace by the plane of other objects, is not necessary configuration.
Described diffraction screen A3 and diffraction screen B9 has plurality of specifications can select to change, the difference of all size is varying in size of circular hole A4 and circular hole B10, but when doing resolving power experiment, the diffraction screen A3 simultaneously installed and used is identical with the necessary specification of diffraction screen B9, and the circular hole A4 namely simultaneously used is identical with circular hole B10 size.
The size of described resolving power apparatus for demonstrating each several part is by following constraint: set the wavelength of light as λ, the diameter of circular hole A4 and circular hole B10 is d, light projection distance after circular hole A4 and circular hole B10 is L, distance between circular hole A4 and circular hole B10 is x, then according to wave optics relative theory, if screen is away from device, during more than 2 meters, can be similar to and thinks: when time, the light that light source A1 and light source B7 sends be able to be differentiated through the diffraction image of circular hole A4 and circular hole B10.Therefore, light source A1 and the adjustable distance range of light source B7 should comprise at least satisfied time, can not the differentiating of resolving power could be demonstrated, be able to differentiate and differentiate full content completely.According to above-mentioned condition, this device can be accomplished very little, if select semiconductor red light laser to be light source, in indoor demonstration, the length sum of device can be controlled within 30 centimetres.
Described diffraction screen A or diffraction screen B can replace with different types of screen, namely circle diffraction screen can be changed into tri-angle-holed diffraction screen, rectangular opening diffraction screen, polygonal hole diffraction screen, singly stitches screen, double slit screen, stitches screen, grating screen, polarizer etc. more, expanding function is for demonstrating the other guide of wave optics.
The function of resolving power apparatus for demonstrating of the present utility model is achieved in that
As shown in Figure 1, 2, 3, described light source A1, sheath A2, pointer A5 to be arranged on guide rail on 13 by support A6, light source B7, sheath B8, pointer B11 to be also arranged on guide rail on 13 by support B12, and to make light source A1 parallel with light source B7 luminescence by same mode; Before sheath A2, load onto the diffraction screen A3 of band circular hole A4, before sheath B8, load onto the diffraction screen B9 of band circular hole B10, the light allowing light source A1 and light source B7 send is just respectively by circular hole A4 and circular hole B10.Identical light source A1 and the directional light that light source B7 sends are by producing two identical diffraction patterns on screen 19 respectively after identical circular hole A4 and circular hole B10, pattern center should be circular speck, is speck A20 and speck B21 respectively, as shown in Figure 4.By traversing carriage A6 on guide rail 13 and support B12, can change the distance x between circular hole A4 and circular hole B10, this distance is equal with the spacing at two speck centers on screen.When the spacing of circular hole A4 and circular hole B10 meets time, two specks be able to be differentiated; When the spacing of circular hole A4 and circular hole B10 time, can not differentiate; When the spacing of circular hole A4 and circular hole B10 time, differentiate completely.X in above-mentioned formula 0the position that can read circular hole A4 and circular hole B10 respectively by pointer 5 and pointer 11 from scale is calculated, and λ is the wavelength of light is that d is the diameter of circular hole A4 and circular hole B10, and L is circular hole A4 and the distance between circular hole B10 and screen 19.
The basic operational steps of resolving power apparatus for demonstrating of the present utility model:
The parallel light that light source A1 and light source B7 sends will be ensured during installation, diffraction screen A3 and the diffraction screen B9 of formed objects circular hole A4 and circular hole B10 is in addition loaded onto respectively before sheath A2 and sheath B8, Closing Switch 16, diffraction pattern projects on screen 19 respectively by after circular hole A4 and circular hole B10 by the light allowing light source A1 and light source B7 send, sliding support A6 or support B12 on scale 14, change the distance of two bundle directional lights thus the distance at change diffraction pattern center, observe the resolution situation in two the bright round spot boundary lines produced by circular hole A4 and circular hole B10 diffraction respectively, checking formula change the diffraction screen of different pore size, change the distance of diffraction screen and screen, can contrast experiment be carried out.Circle diffraction screen is changed into tri-angle-holed diffraction screen, rectangular opening diffraction screen, polygonal hole diffraction screen, singly stitches screen, double slit screen, stitches screen, grating screen, polarizer etc. more, and expanding device function can be used for the other guide demonstrating wave optics.

Claims (6)

1. a resolving power apparatus for demonstrating, it is characterized in that: this device includes shell (18), light source A (1), sheath A (2), diffraction screen A (3) is respectively equipped with, the circular hole B (10) above the circular hole A (4) above diffraction screen A, pointer A (5), support A (6), light source B (7), sheath B (8), diffraction screen B (9), diffraction screen B, pointer B (11), support B (12) in shell (18); Be provided with guide rail (13) above shell (18), in shell (18), be provided with power supply (15);
Described light source A (1) is contained in sheath A (2), and the light that light source A (1) sends is perpendicular through the circular hole A (4) on diffraction screen A (3); Described light source B (7) is contained in sheath B (8), and the light that light source B (7) sends is perpendicular through the circular hole B (10) on diffraction screen B (9); The sensing of described pointer A (5) and pointer B (11) is the center of circle of circular hole A (4) and circular hole B (10) respectively; Described guide rail (13) is fixed on the top of shell (1), guide rail (13) is carved with scale (14); Described light source A (1), sheath A (2), diffraction screen A (3), pointer A (5) become the as a whole support A (6) by exposing shell (18) laterally to slide perpendicular to light emission direction on guide rail (13); Described light source B (7), sheath B (8), diffraction screen B (9), pointer B (11) are integrally laterally slided perpendicular to light emission direction on guide rail (13) by the support B (12) exposing shell (18); The position of described circular hole A (4) and circular hole B (10) reads by being separately fixed at pointer A (5) on sheath A (2) and sheath B (8) and pointer B (11) scale (14) is upper, and then can calculate the spacing of circular hole A (4) and circular hole B (10); Described power supply (15) connecting valve (16), wire (17) are fast light source A (1) and light source B (7) power supply.
2. resolving power apparatus for demonstrating according to claim 1, it is characterized in that: the light that described light source A (1) and light source B (7) send is that wavelength is identical, two-beam line is parallel to each other and be the plane wave or the almost plane ripple that meet far field construction condition, laser instrument can be used as light source, or use ordinary light source to add that spherical wave is become plane wave by lens.
3. resolving power apparatus for demonstrating according to claim 1, is characterized in that: it is vertical with guide rail (13) that described light source A (1) and light source B (7) send two-beam line.
4. resolving power apparatus for demonstrating according to claim 1, it is characterized in that: the direction that described diffraction screen A (3) and diffraction screen B (9) will be luminous with light source B (7) with light source A (1) is vertical, and the light that light source A (1) and light source B (7) is sent is just by circular hole A (4) and circular hole B (10).
5. resolving power apparatus for demonstrating according to claim 1, is characterized in that: the output voltage of described power supply (15) and power will match with light source A (1) and light source B (7); Power supply selects the transformer of battery or external lead wire.
6. resolving power apparatus for demonstrating according to claim 1, is characterized in that: described diffraction screen A (3) has plurality of specifications to replace, and the difference between each specification diffraction screen is varying in size of circular hole A (4) above; Described diffraction screen B (9) has plurality of specifications to replace, and the difference between each specification diffraction screen is varying in size of circular hole B (10) above; When carrying out resolving power demonstration, the circular hole A (4) on the diffraction screen A (3) simultaneously used and diffraction screen B (4) and circular hole B (10) pore size must be same.
CN201420849822.2U 2014-12-29 2014-12-29 Resolving power presentation device Expired - Fee Related CN204740787U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420849822.2U CN204740787U (en) 2014-12-29 2014-12-29 Resolving power presentation device

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Application Number Priority Date Filing Date Title
CN201420849822.2U CN204740787U (en) 2014-12-29 2014-12-29 Resolving power presentation device

Publications (1)

Publication Number Publication Date
CN204740787U true CN204740787U (en) 2015-11-04

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Application Number Title Priority Date Filing Date
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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104575213A (en) * 2014-12-29 2015-04-29 天津城建大学 Resolution capability demonstration device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104575213A (en) * 2014-12-29 2015-04-29 天津城建大学 Resolution capability demonstration device
CN104575213B (en) * 2014-12-29 2017-02-22 天津城建大学 Resolution capability demonstration device

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151104

Termination date: 20161229