CN204303237U - Convex lens image-forming discipline experimental provision - Google Patents
Convex lens image-forming discipline experimental provision Download PDFInfo
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- CN204303237U CN204303237U CN201420862509.2U CN201420862509U CN204303237U CN 204303237 U CN204303237 U CN 204303237U CN 201420862509 U CN201420862509 U CN 201420862509U CN 204303237 U CN204303237 U CN 204303237U
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Abstract
The utility model discloses a kind of convex lens image-forming discipline experimental provision, comprise imaging body (1), convex lens (4), optical screen (5), it is characterized in that: imaging body (1), convex lens (4), optical screen (5) is all contained in base (2) top, and convex lens (4) are arranged between imaging body (1) and optical screen (5), scale (3) is equipped with in base (2) front side, imaging body (1) for some light emitting diodes by " on " printed words inlay the light source being arranged in and white boxes plate is made, light emitting diode is connected with power supply by wire, optical screen (5) is identical with the white boxes plate size specification of imaging body (1).Described convex lens (4) are fitted with shading sleeve.The zero graduation of described scale (3) is arranged in the middle of scale (3), and scale numerical value therefrom between increase gradually to both sides.The utility model is simple to operate, successful, safe and practical.
Description
Technical field
The utility model belongs to education experiment equipment technical field, relates in particular to a kind of convex lens image-forming discipline experimental provision.
Background technology
Convex lens image-forming discipline is the class exercise question that in middle school's optics, quantity is maximum, difficulty is maximum, in middle school's optics, occupy critical role.In the experimental teaching of convex lens image-forming discipline, usually run into a problem, there is very large obstacle for the understanding of " handstand " in convex lens in student.The real image that object can become to stand upside down by convex lens, student is only simply interpreted as this " handstands " " turning upside down ", do not understand material object and as between be the fact of " upper and lower, left and right are put upside down completely ".In teaching, part teacher self-control " F " shape light source or replace conventional candle flame to add the brightness of object as imaging object with the glare light electric torch coveing with hollow out and be carved with the black paperboard of " F ", make imaging more clear, be convenient to the character of observing convex lens, imaging can not be rocked, more stable, effectively overcome that experiment candle causing the gas concentration lwevel in laboratory to increase as light source tangy of sending when burning, constantly shortening in the process of burning, flame of lighting up easily rocks and many deficiencies such as size instability.But there is following shortcoming in the method:
(1) " F " shape light source or only have a kind of color with the glare light electric torch coveing with hollow out and be carved with the black paperboard of " F ", do not give student's visual impact, impression is not deep.
(2) two of " F " horizontal length about the same, not easily observe the left and right of picture very intuitively and put upside down, and convex lens this " handstand " is the wrong views of " turning upside down " not easily to help student to correct unilateral thinking, are difficult to break through this cognitive difficult point.
(3) not closeness to life, friendliness are strong, and the English alphabet that " F " belongs to capitalization has mystique, and the collision of the thinking that is unfavorable for bursting out from the preconception of student, is difficult to motivate students' interest in learning.
(4) " F " shape light source or be carved with the glare light electric torch of the black paperboard of " F " and light source without contacting with coveing with hollow out, is not easy to compare the size of picture and thing.Because optical screen imaging size is with range estimation, when object be positioned at the large real image such as two times of focal lengths to become time, student often thinks to reduce, because picture is darker than thing, thus causes the illusion diminished, in this case by range estimation method by do not go out correct conclusion.
(5) on the optical bench used of laboratory, the zero graduation position of scale, at the high order end of optical bench, is once tested, and object distance and drawing of image distance will carry out twice subtraction.
(6) convex lens that laboratory is used do not join shading sleeve, can not demonstrate when we block convex lens a part of, the size of imaging and change in location.
Summary of the invention
A kind of simple to operate, successful, safe and practical convex lens image-forming discipline experimental provision that the purpose of this utility model is to overcome above-mentioned shortcoming and provides.
The utility model object and solve its technical problem underlying and realize by the following technical solutions:
Convex lens image-forming discipline experimental provision of the present utility model, comprise imaging body, convex lens, optical screen, wherein: imaging body, convex lens, optical screen are all contained in base top, and convex lens are arranged between imaging body and optical screen, on front side of base, scale is housed, imaging body be some light emitting diodes by " on " printed words inlay the light source being arranged in and white boxes plate is made, light emitting diode is connected with power supply by wire, and optical screen is identical with the white boxes plate size specification of imaging body.
Above-mentioned convex lens image-forming discipline experimental provision, wherein: described convex lens are fitted with shading sleeve.
Above-mentioned convex lens image-forming discipline experimental provision, wherein: the zero graduation of described scale is arranged in the middle of scale, and scale numerical value therefrom between increase gradually to both sides.
Above-mentioned convex lens image-forming discipline experimental provision, wherein: described convex lens are contained in the position of scale zero graduation.
Above-mentioned convex lens image-forming discipline experimental provision, wherein: form in described imaging body " on " long horizontal, long perpendicular, the hyphen of word light source LED be respectively 3-4 kind different colours, the color of long horizontal left side light emitting diode can different from the right light emitting diode.
Above-mentioned convex lens image-forming discipline experimental provision, wherein: form in described imaging body " on " be connected in parallel between the light emitting diode of word light source.
Above-mentioned convex lens image-forming discipline experimental provision, wherein: form in described imaging body " on " each luminous point of the light emitting diode of word light source is in the same plane.
Above-mentioned convex lens image-forming discipline experimental provision, wherein: the back side of described imaging body white boxes plate is provided with button cell mounting box, button cell mounting box is furnished with switch and wire.
The utility model compared with the existing technology has obvious advantage and beneficial effect.From above technical scheme, in convex lens image-forming discipline experimental provision of the present utility model, (1) form in imaging body " on " long horizontal, long perpendicular, the hyphen of word light source be made up of the light emitting diode of different colours respectively, can student's visual impact be given, effectively deepen observation of students " inverted real image " " upper and lower, left and right are put upside down completely " impression; (2) form in imaging body " on " font light source has long horizontal and hyphen, two horizontal difference are large, and color is different, student observes the left and right of picture very intuitively and puts upside down, effective help student corrects unilateral thinking, and convex lens this " handstand " is the wrong views of " turning upside down ", very natural, break through this cognitive difficult point cleverly; (3) optical screen is identical with the white boxes plate size specification of imaging body, is convenient to compare the size as with thing; (4) zero graduation of scale is arranged in the middle of scale, and scale numerical value therefrom between increase gradually to both sides, convex lens are contained in the position of scale zero graduation, as long as once experiment reads two data of the right and left, just object distance and image distance can be obtained without any computing, reduce the disturbing factor beyond experiment, reduce difficulty, save time; (5) convex lens are fitted with shading sleeve, and after can being used for probing into glazed area change, whether imaging characteristics changes; (6) very thin thickness of imaging body light source self, therefore object distance is more easily determined, the object distance when using candle can be avoided not to be only value and to determining the difficulty that the position of picture is brought, thus make the data obtained error less; (7) in this experiment, the position of this light source is fixed on the primary optical axis of lens all the time, and this light source also can not wind-engaging impact and rock, change size, thus avoid when light source is candle due to burning shorten, the factors such as flame rocks of lighting up are to testing the adverse effect brought, the picture making optical screen is formed is more clear, stable, thus reduction error, this kind of light source safe is reliable, reusable simultaneously.In a word, the utility model is simple to operate, successful, safe and practical, is applicable to promoting the use of of convex lens image-forming discipline experiment in teaching process.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of imaging body.
Identify in figure:
1, imaging body; 2, base; 3, scale; 4, convex lens; 5, optical screen.
Detailed description of the invention
Below in conjunction with accompanying drawing and preferred embodiment, to according to convex lens image-forming discipline experimental provision detailed description of the invention, structure, feature and the effect thereof that the utility model proposes, be described in detail as follows.
See Fig. 1 to Fig. 2, convex lens image-forming discipline experimental provision of the present utility model, comprise imaging body 1, convex lens 4, optical screen 5, wherein: imaging body 1, convex lens 4, optical screen 5 are all contained in base 2 top, and convex lens 4 are arranged between imaging body 1 and optical screen 5, scale 3 is housed on front side of base 2, imaging body 1 be some light emitting diodes by " on " printed words inlay the light source being arranged in and white boxes plate is made, light emitting diode is connected with power supply by wire, and optical screen 5 is identical with the white boxes plate size specification of imaging body 1.Described convex lens 4 are fitted with shading sleeve.The zero graduation of described scale 3 is arranged in the middle of scale 3, and scale numerical value therefrom between increase gradually to both sides.Described convex lens 4 are contained in the position of scale 3 zero graduation.Form in described imaging body 1 " on " long horizontal, long perpendicular, the hyphen of word light source LED be respectively 3-4 kind different colours, the color of long horizontal left side light emitting diode can different from the right light emitting diode.Form in described imaging body 1 " on " be connected in parallel between the light emitting diode of word light source.Form in described imaging body 1 " on " each luminous point of the light emitting diode of word light source is in the same plane.The back side of described imaging body 1 white boxes plate is provided with button cell mounting box, button cell mounting box is furnished with switch and wire.
Embodiment one: probe into object distance, image distance changes and cause thing, change as character.
Convex lens 4 are placed on the position of scale 3 zero graduation, regulate imaging body 1 " on " height of font light source and optical screen 5, make their center roughly on sustained height, open " on " font light source switch, make it luminous, mobile " on " font light source, make object distance be greater than two times of focal lengths, equal two times of focal lengths, between one times of focal length and two times of focal lengths, equal one times of focal length, be less than one times of focal length, observe imaging character respectively.Repeat to allow while above-mentioned steps " on " font light source or convex lens 4 upper and lower, left and right move, the experimental phenomena of contrast previous stage, observes the change of the character of imaging.
Embodiment two: the imaging characteristics probing into the rear convex lens of glazed area change of convex lens.
Convex lens 4 are placed on the position of scale 3 zero graduation, regulate imaging body 1 " on " height of font light source and optical screen 5, make their center roughly on sustained height, open " on " font light source switch, make it luminous, cover the half of convex lens 4 with shading sleeve, mobile " on " font light source, make object distance be greater than two times of focal lengths, equal two times of focal lengths, between one times of focal length and two times of focal lengths, equal one times of focal length, be less than one times of focal length, observe imaging character.Change the glazed area of convex lens 4 while repeating above-mentioned steps with shading sleeve, contrast the experimental phenomena of previous stage, observe the change of the character of picture.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, anyly do not depart from technical solutions of the utility model content, the any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (8)
1. a convex lens image-forming discipline experimental provision, comprise imaging body (1), convex lens (4), optical screen (5), it is characterized in that: imaging body (1), convex lens (4), optical screen (5) is all contained in base (2) top, and convex lens (4) are arranged between imaging body (1) and optical screen (5), scale (3) is equipped with in base (2) front side, imaging body (1) for some light emitting diodes by " on " printed words inlay the light source being arranged in and white boxes plate is made, light emitting diode is connected with power supply by wire, optical screen (5) is identical with the white boxes plate size specification of imaging body (1).
2. convex lens image-forming discipline experimental provision as claimed in claim 1, is characterized in that: described convex lens (4) are fitted with shading sleeve.
3. convex lens image-forming discipline experimental provision as claimed in claim 1, is characterized in that: the zero graduation of described scale (3) is arranged in the middle of scale (3), and scale numerical value therefrom between increase gradually to both sides.
4. convex lens image-forming discipline experimental provision as claimed in claim 1, is characterized in that: described convex lens (4) are contained in the position of scale (3) zero graduation.
5. convex lens image-forming discipline experimental provision as claimed in claim 1, it is characterized in that: composition in described imaging body (1) " on " long horizontal, long perpendicular, the hyphen of word light source LED be respectively 3-4 kind different colours, the color of long horizontal left side light emitting diode can different from the right light emitting diode.
6. convex lens image-forming discipline experimental provision as claimed in claim 1, is characterized in that: composition in described imaging body (1) " on " be connected in parallel between the light emitting diode of word light source.
7. convex lens image-forming discipline experimental provision as claimed in claim 1, is characterized in that: composition in described imaging body (1) " on " each luminous point of the light emitting diode of word light source is in the same plane.
8. convex lens image-forming discipline experimental provision as claimed in claim 1, is characterized in that: the back side of described imaging body (1) white boxes plate is provided with button cell mounting box, button cell mounting box is furnished with switch and wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420862509.2U CN204303237U (en) | 2014-12-31 | 2014-12-31 | Convex lens image-forming discipline experimental provision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420862509.2U CN204303237U (en) | 2014-12-31 | 2014-12-31 | Convex lens image-forming discipline experimental provision |
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| Publication Number | Publication Date |
|---|---|
| CN204303237U true CN204303237U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420862509.2U Expired - Fee Related CN204303237U (en) | 2014-12-31 | 2014-12-31 | Convex lens image-forming discipline experimental provision |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106683548A (en) * | 2017-03-05 | 2017-05-17 | 苗路成 | Multifunctional teaching optical bench light source and light screen |
| CN108182858A (en) * | 2018-02-01 | 2018-06-19 | 刘绍家 | A kind of redgreenblue electric candle for probing into convex lens image-forming discipline |
-
2014
- 2014-12-31 CN CN201420862509.2U patent/CN204303237U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106683548A (en) * | 2017-03-05 | 2017-05-17 | 苗路成 | Multifunctional teaching optical bench light source and light screen |
| CN108182858A (en) * | 2018-02-01 | 2018-06-19 | 刘绍家 | A kind of redgreenblue electric candle for probing into convex lens image-forming discipline |
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| 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: 20150429 Termination date: 20161231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |