Experimental device for measuring refractive index of glass
By designing a glass refractive index measurement experimental device containing a clamping mechanism and a mounting frame, the problem that existing devices cannot adapt to glass with different thicknesses is solved, and the experiment on the influence of glass with different thicknesses and incident angles on the refractive index is realized, which improves the Flexibility and efficiency of experiments.
Patent Information
- Application Number
- CN202420307306.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-19
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-02-19
AI Technical Summary
The existing glass refractive index measurement experimental devices cannot adapt to glass of different thicknesses for measurement.
An experimental device including a base plate, a support rod, a mounting plate, a clamping mechanism, an angle measuring device and a mounting frame was designed. The clamping mechanism adapts to glass of different thicknesses through clamping springs. The mounting frame adjusts the incident angle through the damping shaft. The angle measuring device measures the angle of rotation of the mounting frame, thereby calculating the refractive index of the glass.
This device can be convenient for adapting glass of different thicknesses to measure the refractive index, complete experiments on the influence of glass thickness and incident angle on the refractive index, and is easy to replace glass and light sources, improving the flexibility and efficiency of the experiment.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of glass refractive index measurement, in particular to an experimental device for measuring the glass refractive index. Background Art
[0002] When light is incident obliquely from one medium to another, the direction of propagation generally changes. This phenomenon is called refraction of light. For high school students, it is not only necessary to understand this physical image, but also to understand the refractive index at a deeper level, and to measure the refractive index through experiments. In daily contact, the media that can produce refraction are glass and water, so the usual experimental devices all use glass as the experimental material. Although the current experimental equipment can only complete the measurement of the refractive index, it cannot measure the refractive index for glass of different thicknesses. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide an experimental device for measuring the refractive index of glass which can be conveniently adapted to glasses of different thicknesses.
[0004] In order to solve the above problems, the utility model provides an experimental device for measuring the refractive index of glass, the experimental device for measuring the refractive index of glass comprises a base plate, a support rod, a mounting plate, a clamping mechanism, an angle measuring device and a mounting frame, the base plate is provided with a support rod, the mounting plate is arranged on the support rod, the clamping mechanism is used to clamp the glass, the clamping mechanism is arranged on the mounting plate, the clamping mechanism comprises a clamping member, a clamping spring and a connecting member, the connecting member is connected to the mounting plate, the clamping member is slidably arranged on the connecting member, the clamping spring is sleeved on the connecting member, and the lower end of the clamping spring abuts on the connecting member, and the upper end of the clamping spring abuts on the clamping member, the mounting frame is mounted on the mounting plate through a damping shaft, a light source is fixed on the mounting frame, the angle measuring device is mounted on the mounting plate, and the angle measuring device is used to measure the rotation angle of the mounting frame.
[0005] Furthermore, a slide groove is provided on the mounting plate, and the connecting member is slidably arranged in the slide groove.
[0006] Furthermore, a connecting sleeve is provided on the mounting plate, the connecting sleeve is sleeved on the supporting rod, a fastening bolt is threaded on the connecting sleeve, and the connecting sleeve is fixed to the supporting rod by the fastening bolt.
[0007] Furthermore, the bottom plate is provided with scales.
[0008] Furthermore, the support rod is provided with a scale.
[0009] Furthermore, the clamping member is located below the mounting plate.
[0010] Furthermore, the angle measuring device is a protractor, and the center of the protractor is concentric with the center of rotation of the mounting frame.
[0011] Furthermore, the mounting frame includes a rotating rod, a fixed plate, a movable plate, an anti-slip component and a fixed spring. The anti-slip component passes through the movable plate and is connected to the fixed plate. One end of the fixed spring abuts against the anti-slip component, and the other end of the fixed spring abuts against the movable plate. The fixed spring is used to push the movable plate to move toward the fixed plate. The movable plate cooperates with the fixed plate to clamp the light source, and the fixed plate is fixed on the rotating rod.
[0012] Furthermore, the fixed plate and the movable plate are both recessed outward to form fixing holes for fixing the light source.
[0013] Furthermore, the light source is a laser pen.
[0014] The experimental device for measuring the refractive index of glass of the utility model can adapt to glasses of different thicknesses through the elastic force of the clamping spring, and can complete the experiment of whether the glass thickness affects the refractive index. At the same time, the incident angle can be adjusted by rotating the mounting frame, and the experiment of whether the incident angle affects the refractive index can be completed. When replacing the glass, it is only necessary to remove and insert the new glass into the clamping part, and it can be completed without disassembling any parts. The glass is convenient to replace, so it is convenient to complete the experiment of whether different glasses affect the refractive index. Of course, the refraction angle can be calculated according to the point after refraction, and the refractive index can be calculated according to the incident angle, that is, the angle of rotation of the mounting frame, so as to complete the calculation of the refractive index of the experimental glass. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of a preferred implementation mode of the experimental device for measuring the refractive index of glass of the utility model.
[0016] Figure 2 It is a front view of an experimental device for measuring the refractive index of glass according to the utility model.
[0017] Figure 3 It is a cross-sectional view of an experimental device for measuring the refractive index of glass according to the utility model.
[0018] The meanings of the symbols in the accompanying drawings are:
[0019] Base plate 1, support rod 2, mounting plate 3, through hole 31, slide groove 32, connecting sleeve 33, fastening bolt 34, clamping mechanism 4, clamping member 41, clamping spring 42, connecting member 43, angle measuring device 5, mounting frame 6, rotating rod 61, fixing plate 62, movable plate 63, anti-slip member 64, fixing spring 65, light source 7, glass 8. DETAILED DESCRIPTION
[0020] The utility model will be further described below in conjunction with the accompanying drawings.
[0021] like Figures 1 to 3 As shown, the preferred embodiment of the experimental device for measuring the refractive index of glass 8 of the utility model comprises a base plate 1, a support rod 2, a mounting plate 3, a clamping mechanism 4, an angle measuring device 5 and a mounting frame 6. The base plate 1 is provided with a support rod 2, the mounting plate 3 is provided on the support rod 2, and the support rod 2 is used to support the mounting plate 3. The support rod 2 is provided with a scale for displaying the height of the mounting plate 3. The clamping mechanism 4 is provided on the mounting plate 3, and the clamping mechanism 4 is used to clamp the glass 8. The mounting frame 6 is installed on the mounting plate 3 through a damping shaft, so that the mounting frame 6 can rotate and stop at will. The mounting plate 3 is provided with a through hole 31, and the position of the through hole 31 corresponds to the position of the glass 8 after being fixed, so that the light source 7 can be shot into the glass 8 through the through hole 31. The mounting frame is fixed with a light source 7, and the light source 7 is used to emit a light beam. The light source 7 adopts a laser pen, which is convenient for purchase and can also intuitively see the path of the light. The angle measuring device 5 is installed on the mounting plate 3. The angle measuring device 5 is used to measure the rotation angle of the mounting frame 6. The rotation angle of the mounting frame 6 is the incident angle of the light source 7, which reduces the measurement of the incident angle. The angle measuring device 5 is a protractor, which is fixed to the mounting plate 3 by bonding. The center of the protractor is concentric with the center of rotation of the mounting frame 6.
[0022] The base plate 1 is provided with scales, which include distance scales from the center of the base plate 1 and angle scales rotating with the axis of rotation of the mounting frame 6 as the origin. In other real-time modes, only linear scales or angle scales may be used.
[0023] The bottom of the mounting plate 3 is provided with a slide groove 32, and the clamping mechanism 4 is arranged in the slide groove 32. The clamping mechanism 4 slides in the slide groove 32, so that the spacing between the two clamping mechanisms 4 is changed, and the spacing can be changed according to the glass 8 of different widths, and the glass 8 of different widths can be applied, so as to expand the scope of application. The clamping mechanism 4 is arranged below the mounting plate 3, so that no matter what thickness of glass 8 is clamped to the mounting plate 3 by the clamping mechanism 4, the height position of the point where the light source 7 captures the glass 8 is always the same height, avoiding repeated measurement of the height information of the incident point. The mounting plate 3 is provided with a connecting sleeve 33, and the connecting sleeve 33 is sleeved on the support rod 2. The connecting sleeve 33 is screwed with a fastening bolt 34, and the connecting sleeve 33 is fixed to the support rod 2 by the fastening bolt 34. When the height of the mounting plate 3 needs to be adjusted, the fastening bolt 34 is loosened, and then the sliding sleeve is slid, and the fastening bolt 34 is tightened after sliding into place, and the adjustment is completed to adapt to the operation habits of different heights. A positioning step is provided in the through hole 31, and the axis of rotation of the mounting frame 6 is located on the top surface of the positioning step, so as to fix the position of the light source 7 incident on the glass 8 to be flush with the axis of rotation of the mounting frame 6. In this way, no matter how the rotating frame rotates, the angle measured by the angle measuring device 5 is always equal to the incident angle of the light source 7.
[0024] The clamping mechanism 4 includes a clamping member 41, a clamping spring 42 and a connecting member 43, wherein the connecting member 43 is connected to the mounting plate 3, the clamping member 41 is slidably arranged on the connecting member 43, the clamping spring 42 is sleeved on the connecting member 43, and the lower end of the clamping spring 42 abuts on the connecting member 43, and the upper end of the clamping spring 42 abuts on the clamping member 41. The clamping member 41 is U-shaped to ensure that the clamping member 41 does not easily affect the light speed. When the glass 8 needs to be clamped, the clamping member 41 is pulled downward to leave enough clearance between the clamping member 41 and the mounting plate 3, and then the glass 8 is placed in the clamping member 41 and the clamping member 41 is loosened to complete the clamping and fixing of the glass 8. It should be known that those skilled in the art know how to select a clamping spring 42 of appropriate strength to facilitate pulling the clamping member while ensuring that the clamping member has enough force to clamp the glass 8. By using the clamping spring 42 to accommodate glass 8 of different thicknesses, it is possible to observe whether the thickness of the glass 8 affects the refractive index.
[0025] The mounting frame 6 includes a rotating rod 61, a fixed plate 62, a movable plate 63, an anti-slipping member 64 and a fixed spring 65. The lower end of the rotating rod 61 is connected to the damping shaft, and the upper end of the rotating rod 61 is fixedly connected to the fixed plate 62. The anti-slipping member 64 passes through the movable plate 63 and is connected to the fixed plate 62. A nut is usually provided on the anti-slipping rod to realize the connection between the anti-slipping rod and the fixed plate 62; the movable plate 63 can move on the anti-slipping rod. One end of the fixed spring 65 abuts against the anti-slipping member 64, and the other end of the fixed spring 65 abuts against the movable plate 63. The fixed spring 65 is used to push the movable plate 63 to move in the direction of the fixed plate 62, and the movable plate 63 cooperates with the fixed plate 62 to clamp the light source 7. The fixed plate 62 and the movable plate 63 are both recessed outward to form a groove, and the groove of the movable plate 63 and the groove of the fixed plate 62 are combined to form a fixing hole for fixing the light source 7, which is convenient and stable to fix the light source 7. When it is necessary to fix the light source 7, pull open the movable plate 63 to place the light source 7 in the groove of the fixed plate 62, then loosen the movable plate 63 so that the movable plate 63 and the fixed plate 62 clamp and fix the light source 7, and finally loosen the light source 7. When it is necessary to take out the light source 7, just pull the light source 7 directly. It is convenient to replace the light source 7. By replacing the monochromatic light source 7 of different colors, it is possible to observe whether the light source 7 of different colors has an effect on the refractive index. The laser pen is monochromatic, so it can be completed by replacing the laser pen of different colors. It should be known that those skilled in the art know how to select a fixing spring 65 of appropriate strength to facilitate pulling the movable plate 63 while ensuring that the movable plate 63 has enough force to clamp the light source 7.
[0026] When in use, first clamp the glass 8 to be tested on the mounting plate 3, then turn on the light source 7, read the position information of the light spot and the rotation angle of the mounting frame 6 according to the scale on the bottom plate 1, if the scale on the bottom plate 1 contains angle information, the refractive index can be obtained by dividing the incident angle by the angle, that is, the refractive index of the glass 8 can be measured. If the scale of the bottom plate 1 only contains distance scale information, the refractive angle can be calculated by the triangle formed by the incident point, the position of the projection of the incident point on the bottom plate 1 and the light spot, and the height of the incident point can be calculated by subtracting a fixed value from the height of the mounting plate 3, thereby calculating the refractive index; fixed value = thickness of the mounting plate 3 - height of the positioning step.
[0027] Of course, the refraction angle can be calculated according to the position information of the light on the bottom plate 1, and the refractive index can be calculated according to the incident angle, so as to complete the calculation of the refractive index of the experimental glass 8, and the measurement is convenient. The rotation angle of the mounting frame 6 can be adjusted at will, so as to adjust the incident angle, and the experiment of whether the incident angle affects the refractive index can be completed; the clamping mechanism can clamp glass 8 of different thicknesses, and the experiment of whether the thickness of the glass 8 affects the refractive index can be completed; at the same time, when replacing the glass 8, it is only necessary to remove and insert the new glass 8 into the clamping member 41, and it can be completed without disassembling any parts, and the replacement of the glass 8 is convenient, so that the experiment of whether different glasses 8 affect the refractive index can be completed conveniently. It is convenient to replace the light source 7, and it is convenient to complete the experiment of whether different colors of light affect the refractive index. The experiment of refractive index can be expanded, so that students can have a deeper understanding of refractive index.
[0028] The above are only implementation methods of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure made using the contents of the specification and drawings of the present utility model, directly or indirectly used in other related technical fields, are also within the patent protection scope of the present utility model.
Claims
1. An experimental device for measuring the refractive index of glass, characterized in that: The invention comprises a base plate, a support rod, a mounting plate, a clamping mechanism, an angle measuring device and a mounting frame, wherein the base plate is provided with a support rod, the mounting plate is arranged on the support rod, the clamping mechanism is used for clamping the glass, the clamping mechanism is arranged on the mounting plate, the clamping mechanism comprises a clamping member, a clamping spring and a connecting member, the connecting member is connected to the mounting plate, the clamping member is slidably arranged on the connecting member, the clamping spring is sleeved on the connecting member, and the lower end of the clamping spring abuts on the connecting member, and the upper end of the clamping spring abuts on the clamping member, the mounting frame is mounted on the mounting plate through a damping shaft, a light source is fixed on the mounting frame, the angle measuring device is mounted on the mounting plate, the center of the angle measuring device is concentric with the center of rotation of the mounting frame, and the angle measuring device is used for measuring the angle of rotation of the mounting frame.
2. The experimental device for measuring the refractive index of glass according to claim 1, characterized in that: The mounting plate is provided with a slide groove, and the connecting member is slidably arranged in the slide groove.
3. The experimental device for measuring the refractive index of glass according to claim 1, characterized in that: The mounting plate is provided with a connecting sleeve, the connecting sleeve is sleeved on the supporting rod, a fastening bolt is threadedly provided on the connecting sleeve, and the connecting sleeve is fixed to the supporting rod through the fastening bolt.
4. The experimental device for measuring the refractive index of glass according to claim 1, characterized in that: The bottom plate is provided with scales.
5. The experimental device for measuring the refractive index of glass according to claim 1, characterized in that: The support rod is provided with a scale.
6. The experimental device for measuring the refractive index of glass according to claim 1, characterized in that: The clamping member is located below the mounting plate.
7. The experimental device for measuring the refractive index of glass according to claim 1, characterized in that: The angle measuring device is a protractor.
8. The experimental device for measuring the refractive index of glass according to claim 1, characterized in that: The mounting frame includes a rotating rod, a fixed plate, a movable plate, an anti-slip component and a fixed spring. The anti-slip component passes through the movable plate and is connected to the fixed plate. One end of the fixed spring abuts against the anti-slip component, and the other end of the fixed spring abuts against the movable plate. The fixed spring is used to push the movable plate to move toward the fixed plate. The movable plate cooperates with the fixed plate to clamp the light source, and the fixed plate is fixed on the rotating rod.
9. The experimental device for measuring the refractive index of glass as claimed in claim 8, characterized in that: The fixed plate and the movable plate are both recessed outward to form fixing holes for fixing the light source.
10. The experimental device for measuring the refractive index of glass according to claim 1, characterized in that: The light source is a laser pen.