Light refraction demonstration device

Abstract

The light refraction demonstration device comprises a supporting mechanism, a test bed, a plurality of light sources and a medium groove, the supporting mechanism comprises a bottom plate, a vertical supporting plate with the lower end fixedly connected with the bottom plate and a vertical mounting plate fixedly connected with the upper end of the supporting plate, and the rear end of the test bed is connected with the front end of the mounting plate. A milky white light screen is arranged at the front end of the test bed, the medium groove is in a semi-cylinder shape and comprises two opposite semicircular walls, an arc wall and a side wall opposite to the arc wall, a groove cavity with an opening located in the side wall is formed in the medium groove, the side wall is located at the upper end, the left end and the right end of the side wall are each connected with a connecting lug, and the connecting lugs are connected with the test bed through screws. And a medium is filled in the medium groove. The problems that the light path phenomenon is hidden and difficult to distinguish and the medium is single are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of teaching experiment, concretely relates to light refraction demonstration device. BACKGROUND

[0002] In the light refraction teaching, in order to demonstrate light path, the following two problems exist in the laboratory of the existing demonstration instrument.(1) Light path phenomenon is subtle and difficult to distinguish: when carrying out the light refraction experiment, since the propagation path of light in air and water (or glass brick) is relatively close, the change of light path can not be enough remarkable, leading to that students are difficult to clearly observe the refraction phenomenon.(2) Medium type is single: the experiment can usually only demonstrate the refraction condition from air medium to water or glass brick, which limits the understanding and comparison of students on the refraction phenomenon between different media. SUMMARY

[0003] The utility model solves the technical problems: in view of the prior art, how to improve the medium to solve the problems in the background art.

[0004] In order to realize the utility model of the purpose, the following technical scheme is used to realize:

[0005] Light refraction demonstration device, including support mechanism, test table, a plurality of light sources and medium groove, the support mechanism includes bottom plate, the support plate of lower end and bottom plate fixed connection and vertical, and the mounting plate of vertical and with support plate upper end fixed connection, the test table rear end is connected with the mounting plate front end, and the test table front end is set to opalescent light screen, the medium groove is semicylindrical, the medium groove includes two opposite semicircular walls, an arc wall and the side wall opposite to the arc wall, the medium groove is equipped with the slot cavity with the opening in the side wall, the side wall is in the upper end, and the side wall left and right ends are connected with a connecting lug respectively, and the connecting lug is connected with the test table through screw, the medium is loaded in the medium groove.

[0006] Further, the medium is starch solution, or the medium is semicylindrical lead silicate glass, or the medium is glycerol.

[0007] Further, the mounting plate is connected with the light shield that covers the test table outside, and the light shield front end is equipped with the window that exposes the opalescent light screen.

[0008] Further, the test table is cylindrical, the mounting plate is connected with the annular track that surrounds the test table side wall outside, and the light source is slidably connected with the track.

[0009] Further, the bracket includes a fixed plate connected to the upper part of the test table through a screw and an L-shaped plate connected to the middle part of the fixed plate, one end of the L-shaped plate is located in front of the middle part of the side wall of the medium tank, the end of the L-shaped plate is rotatably connected to one end of the short steel pipe through a pin shaft, and the end of the L-shaped plate is rotatably connected to the middle part of the long steel pipe through a pin shaft.

[0010] Further, the light source is provided with a magnetic member for attracting the other end of the steel pipe.

[0011] Further, the front end of the light shield is also provided with a scale.

[0012] Further, the installation plate on the right side of the test table is also provided with a nano spraying instrument for spraying the test table.

[0013] Further, the test table is also detachably connected with a test plate for testing the reflection light or the refraction light coplanar with the incident light, the test plate includes a cross-shaped transparent connecting belt and four ninety-degree sector-shaped plane mirrors, the four plane mirrors are arranged in a circular shape and are bonded to the cross-shaped connecting belt.

[0014] Compared with the prior art, the main beneficial effects of the utility model are that: the medium tank is filled with high-refractive lead silicate glass, lanthanide glass or glycerol, sugar syrup and other high-refractive media, so that the incident light and the refracted light are separated obviously, easy to observe, students can clearly observe the refraction phenomenon, thereby solving the problem that the light path phenomenon is difficult to distinguish, and in addition, many liquids and solids can be replaced as media, so that the problem of single medium is solved, students can use more different media for experiments, and the experimental effect is strengthened. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic view of the utility model;

[0016] Figure 2 is a structural schematic view of the utility model without a light shield;

[0017] Figure 3 is a structural schematic view of the medium tank of the utility model;

[0018] Figure 4 is a structural schematic view of the fixed plate of the utility model;

[0019] Figure 5 is a structural schematic view of the short steel pipe of the utility model;

[0020] Figure 6 is an installation schematic view of the test plate of the utility model;

[0021] Figure 7It is the structural schematic view of the utility model test plate;

[0022] Sign: 1, support mechanism;11, floor;12, support plate;13, mounting plate;131, track;2, test bench;3, light source;4, medium groove;41, cavity;42, connecting lug;5, light shield;6, bracket;61, fixed plate;62, L plate;7, short steel pipe;8, nano spray instrument;9, scale;10, test plate;10.1, plane mirror;10.2, connecting belt. DETAILED DESCRIPTION

[0023] The following is according to the attached Figures 1-7 The specific embodiment of the utility model is explained in detail. EMBODIMENT

[0024] This embodiment is a light refraction demonstration device, as shown in 1 and Figure 2 It includes support mechanism 1, cylindrical test bench 2, two light sources 3 and medium groove 4. The support mechanism 1 includes bottom plate, vertical support plate 12 fixedly connected with the bottom plate at the lower end and vertical mounting plate 13 fixedly connected with the upper end of the support plate 12. The rear end of the test bench 2 is fixedly connected with the front end of the mounting plate 13, and the front end of the test bench 2 is provided with a milky white light screen. Two light sources 3 are provided, and a ring-shaped track 131 around the side wall of the test bench 2 is fixedly connected on the mounting plate 13. The two light sources 3 are slidingly connected with the track 131. How to slidingly connect is not the design point of the present application, but the present application still provides a common connection method. A concave block with an opening downward is fixed on the light source 3, the concave block is sleeved on the track 131, and a bolt is arranged on the concave block. In this way, when the bolt is tightened, the concave block can be fixed at a certain position on the track 131, and when the bolt is loosened, the concave block can slide on the track 131.

[0025] The present application provides two independently controllable light sources 3, one for generating incident light, and the other for simulating refracted light. The first light source 3 is used to generate incident light, and the second light source 3 is used to emit light along the previously recorded refracted light path to observe whether it propagates reversely along the path of the incident light. In this way, the "light path reversible" phenomenon can be explored.

[0026] As Figure 3As shown, the medium tank 4 is a semi-cylindrical body, the medium tank 4 includes two opposite semi-circular walls, an arc wall and a side wall opposite to the arc wall, the medium tank 4 is provided with a tank cavity 41 with an opening at the side wall, the side wall is at the upper end, the medium tank 4 is provided with a medium, so that the medium tank 4 can be provided with different liquid mediums or semi-cylindrical solid mediums, so as to study the refraction of light, solve the problem of single medium, and can select a medium with a large refractive index, so that the refraction phenomenon can be clearly observed, and the problem that the light path phenomenon is difficult to distinguish when some media are used for experiments is better solved. The left and right ends of the side wall of the medium tank 4 are respectively fixedly connected with a connecting lug 42, and the connecting lug 42 is detachably connected with the test table 2 through a screw.

[0027] Because the light is regarded as infinite length, when the light passes through the device, the part of the light outside the device can interfere, which affects the accurate observation and judgment of the refraction phenomenon by students. Therefore, the present application is provided with a light shield 5 which is arranged outside the test table 2 on the mounting plate 13, the mounting plate 13 and the light shield 5 are fixedly connected or detachably connected through a screw, and the front end of the light shield 5 is provided with a window which exposes the milky white light screen, so as to eliminate the interference of most external light and facilitate observation. The front end of the light shield 5 is also provided with a scale 9, which facilitates the measurement of the position of the object and the image.

[0028] The present application is provided with two thin steel pipes (the length of the long steel pipe can be twice the length of the short steel pipe 7, the short steel pipe 7 is shown in Figure 5 ), specifically as follows, the bracket 6 (shown in Figure 4 ) includes a fixed plate 61 connected to the upper part of the test table 2 through a screw and an L plate 62 connected to the middle part of the fixed plate 61, one end of the L plate 62 is located in front of the middle part of the side wall of the medium tank 4, and the end of the L plate 62 is rotatably connected to one end of the end steel pipe and the middle part of the long steel pipe through a pin shaft, and the center of the pin shaft is collinear with the center of the medium of the medium tank 4. The light source 3 can be various laser pens or small lasers, and in this application, a helium-neon laser pen is used, and a condensing lens can also be arranged on the laser pen, and the color can also be adjusted. The laser pen is sleeved with a magnetic pen sleeve (a magnet can also be attached) for attracting the steel pipe, so that the steel pipe and the laser pen can be connected and separated, and the steel pipe can be aligned with the light emitted by the laser pen. The steel pipe has small mass and is not easy to deform, and the other end is convenient for attracting and fixing the magnetic laser pen sleeve, so that the thin steel pipe and the actual light are well matched, and the refraction law of light can be dynamically simulated and demonstrated. At the position where the light reaches the medium, two simulated light lines (thin steel pipes) are used, and the simulated light lines can rotate around the pin shaft. First, fix the laser pen at the starting end of the incident light, and let the light shoot towards the center of the medium along the simulated light. Let the longer part of the simulated light coincide with the refracted light, and the other part of the simulated refracted light is the reverse extension line, and the parallel line of the normal line at the light source 3 point is the position of the virtual image.

[0029] The present invention can also be equipped with a nano sprayer 8, which is installed on the mounting plate 13 on the right side of the inspection table. A small amount of smoke is sprayed into the liquid medium. By utilizing the smoke scattering phenomenon, the trace of the light path can be observed better.

[0030] During the experiment, a variety of transparent media materials can be selected, including but not limited to glass with different refractive indices (such as semi-cylindrical lead silicate glass), acrylic, resin, sugar solution, starch solution, organic liquids (such as glycerol, alcohol, etc.), special plastics, etc. Each medium has a different refractive index, which enriches the experiment, enhances students' interest, and helps them better grasp the knowledge related to the refraction of light.

[0031] The present invention also includes an inspection plate 10, such as Figure 6 As shown, the inspection table and inspection plate 10 are detachably connected. Figure 7 As shown, the test plate 10 includes a cross-shaped transparent connecting strip 10.2 and four 90-degree fan-shaped plane mirrors 10.1. The four plane mirrors are arranged in a circle and are bonded to the cross-shaped connecting strip 10.2. A hole is drilled in the middle of the connecting strip 10.2 and another hole is drilled in the upper right corner of the plane mirror. After removing the medium tank 4, the bracket 6, and the steel pipe from the test table, the test plate can be installed on the test table with screws. This allows for experiments to be performed to determine whether reflected or refracted rays are coplanar with incident rays. Specific usage is based on existing knowledge and will not be elaborated upon here.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A demonstration device for refraction of light, characterized in that The utility model provides a kind of light source test device, including support mechanism, test bench, several light sources and medium tank, the support mechanism includes bottom plate, the support plate of lower end and bottom plate fixed connection and vertical, and the mounting plate of vertical and fixed connection with the upper end of support plate, the test bench rear end is connected with the mounting plate front end, and the test bench front end is set to opalescent light screen, the medium tank is semicylindrical, the medium tank includes two opposite semicircular walls, an arc wall and the side wall opposite to arc wall, the medium tank is equipped with slot cavity with opening in side wall, the side wall is in upper end, and side wall left and right ends are respectively connected with one connecting lug, and connecting lug is connected with test bench by screw, and the medium tank is equipped with medium.

2. The refractive demonstration of light of claim 1, wherein The medium is starch solution, or the medium is semicylindrical lead silicate glass, or the medium is glycerol.

3. The refractive demonstration of light of claim 1, wherein The mounting plate is connected with light shield covering test bench outside, and the light shield front end is equipped with window exposing opalescent light screen.

4. The refractive demonstration of light of claim 1, wherein The test bench is cylindrical, the mounting plate is connected with annular track surrounding test bench side wall outside, and the light source is slidably connected with track.

5. The refractive demonstration of light of claim 1, wherein Further including support and one long and one short two thin steel pipes, the support includes fixed plate connected with upper part of test bench by screw and L plate connected with middle part of fixed plate, one end of L plate is in front of middle part of side wall of medium tank, and the end of L plate is rotatably connected with one end of short steel pipe by pin shaft, and the end of L plate is rotatably connected with middle part of long steel pipe by pin shaft.

6. The refractive demonstration of light of claim 5, wherein The light source is provided with magnetic member for attracting the other end of steel pipe.

7. The refractive demonstration of light of claim 3, wherein The light shield front end is further provided with scale.

8. The refractive demonstration of light of claim 1, wherein The mounting plate on the right side of test bench is further provided with nano spraying instrument for spraying to test bench.

9. The refractive demonstration of light of claim 1, wherein The test bench is further provided with removable inspection plate for testing that reflected light or refracted light is coplanar with incident light, and the inspection plate includes cross-shaped transparent connecting band and four ninety-degree sector plane mirrors, four plane mirrors are arranged in circular shape and are bonded with cross-shaped connecting band.

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