CN102103810A - Convex lens diverging effect demonstration instrument - Google Patents
Convex lens diverging effect demonstration instrument Download PDFInfo
- Publication number
- CN102103810A CN102103810A CN2009102652437A CN200910265243A CN102103810A CN 102103810 A CN102103810 A CN 102103810A CN 2009102652437 A CN2009102652437 A CN 2009102652437A CN 200910265243 A CN200910265243 A CN 200910265243A CN 102103810 A CN102103810 A CN 102103810A
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- convex lens
- medium
- bulk container
- effect
- refractive index
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Abstract
The invention relates to a device for displaying the diverging effect of a convex lens on light, which is suitable for demonstration experiments in classes in middle schools. In order to enable students to observe the truth that the convex lens also has the diverging effect even when the refractive index of a medium at the periphery of the convex lens is greater than that of a material for manufacturing the convex lens, a water container is modified, a hollow convex lens which is made of a thin transparent plastic plate or glass sheet is arranged at the bottom of a transparent large container, and the aim that a medium in the convex lens and the medium at the periphery of the convex lens can be conveniently changed is fulfilled, so that the refractive index is changed. The experiment instrument is made of a simple material, and is convenient to manufacture and easy to popularize. By observing the experiment phenomenon, the students are promoted to further understand the effect of the convex lens, and a good teaching effect can be achieved.
Description
Technical field
The present invention relates to a kind of convex lens that show light is played the device of disperse function, be applicable in the classroom, middle school as lecture experiment.
Background technology
Convex lens have the common recognition that converging action is for everybody to light, but this phenomenon is with good conditionsi, and promptly the medium refraction index of convex lens periphery is less than the material refractive index of making convex lens.For example the bubble in the water is exactly a kind of effect of dispersing to the influence of light, and understands thorough inadequately for these many students owing to lacking practical experience.The school laboratory does not have a kind of suitable experimental provision yet at present, can demonstrate the not same-action that convex lens show when medium refraction index changes easily.
Summary of the invention
In order to allow observation of students arrive under given conditions, the medium refraction index that is the convex lens periphery is when making the material refractive index of convex lens, convex lens also can have this fact of disperse function, the present invention transforms a water container, realization can change the purpose of convex lens inside and peripheral medium easily, thereby changes refractive index.
The concrete technical scheme of the present invention is: with the hollow convex lens (can cut a section and flattening of transparent Coke bottle) of thin transparent plastic sheet of a usefulness or glass sheet making, be installed in a transparent bulk container bottom, the height of hollow convex lens is identical with the height of transparent bulk container.The first step of experiment can only be given and be injected water in the hollow convex lens, outside transparent bulk container one side, inject transparent bulk container and by being the convex lens of material with water with two bundle laser, with translucent frosted glass is optical screen, from near transparent bulk container opposite side gradually away from, will see the converging action of convex lens to light; Second step of experiment can inject water only for transparent bulk container, and guarantee to have only air in the hollow convex lens, outside transparent bulk container one side, inject transparent bulk container with two bundle laser equally, and by being the convex lens of material with the air in the water, with translucent frosted glass is optical screen, from near transparent bulk container opposite side gradually away from, will see the disperse function of convex lens to light; The 3rd step of experiment can charge into different medium for respectively hollow convex lens and bulk container, observes its not same-action to light again.
Great advantage of the present invention is exactly with after the water container transformation, can change the material of convex lens easily, and the medium of convex lens periphery, realizes the convenient purpose that changes refractive index.And this experimental apparatus draws materials simply, and is easy to make, is easy to promote.By observation to this experimental phenomena, impel the student that more deep understanding is carried out in the effect of convex lens, can reach better teaching.
Description of drawings
The present invention is further described with concrete experimental procedure below in conjunction with accompanying drawing.
Fig. 1 is the embodiments of the invention principle schematic.
Fig. 2 is an embodiments of the invention principle diagrammatic top view.
1. lasing light emitters among the figure, 2. transparent bulk container, 3. hollow convex lens, 4. frosted glass optical screen, 5. hot spot.
Embodiment
In Fig. 1, will be installed in transparent bulk container 2 bottoms with the hollow convex lens 3 that thin transparent plastic sheet or glass sheet are made, the height of hollow convex lens 3 is identical with the height of transparent bulk container 2.
The first step is only given in the hollow convex lens 3 and is injected water among the embodiment, two bundle laser of lasing light emitter 1 are injected outside transparent bulk container 2 one sides, and by with water being the convex lens 3 of material, with translucent frosted glass 4 near transparent bulk container 2 opposite sides gradually away from, see the converging action of convex lens by the variable in distance between the hot spot 5 to light; Second step injected water can only for transparent bulk container 2, and guarantee to have only air in the hollow convex lens 3, inject outside transparent bulk container 2 one sides with two bundle laser equally, and by being the convex lens 3 of material with the air in the water, with frosted glass optical screen 4 near transparent bulk container 2 opposite sides gradually away from, will see the disperse function of convex lens to light; The 3rd step of experiment can charge into different medium for respectively hollow convex lens 3 and transparent bulk container 2, repeats above experiment.
Claims (1)
1. convex lens disperse function demonstrator, it is characterized in that: with the hollow convex lens of thin transparent plastic sheet of a usefulness or glass sheet making, be installed in a bulk container bottom, charge into different medium for respectively hollow convex lens and bulk container, observe its not same-action light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102652437A CN102103810A (en) | 2009-12-18 | 2009-12-18 | Convex lens diverging effect demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102652437A CN102103810A (en) | 2009-12-18 | 2009-12-18 | Convex lens diverging effect demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102103810A true CN102103810A (en) | 2011-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102652437A Pending CN102103810A (en) | 2009-12-18 | 2009-12-18 | Convex lens diverging effect demonstration instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN102103810A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105023490A (en) * | 2015-06-25 | 2015-11-04 | 陕西师范大学 | Test device of cold flow optical concentrating effect in liquid, and test method |
| CN109036051A (en) * | 2018-07-09 | 2018-12-18 | 陕西师范大学 | The apparatus for demonstrating and demenstration method that surrounding medium influences the poly- astigmatism characteristics of lens |
| CN110364063A (en) * | 2019-07-23 | 2019-10-22 | 南开大学 | A kind of multi-functional geometric optics demonstrator |
-
2009
- 2009-12-18 CN CN2009102652437A patent/CN102103810A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105023490A (en) * | 2015-06-25 | 2015-11-04 | 陕西师范大学 | Test device of cold flow optical concentrating effect in liquid, and test method |
| CN105023490B (en) * | 2015-06-25 | 2017-07-11 | 陕西师范大学 | Cold flow spotlight effect experimental provision and experimental method in liquid |
| CN109036051A (en) * | 2018-07-09 | 2018-12-18 | 陕西师范大学 | The apparatus for demonstrating and demenstration method that surrounding medium influences the poly- astigmatism characteristics of lens |
| CN109036051B (en) * | 2018-07-09 | 2020-10-30 | 陕西师范大学 | Demonstration device and demonstration method for influence of environment medium on lens astigmatism gathering characteristic |
| CN110364063A (en) * | 2019-07-23 | 2019-10-22 | 南开大学 | A kind of multi-functional geometric optics demonstrator |
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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: 20110622 |