Photoelectric effect display device

Abstract

The utility model discloses a photoelectric effect display device which comprises a spotlight, a filter lens and a photoelectric tube. The filter lenses are annularly fixed in the rotating disc at equal angles, and the rotating disc comprises a first fixing plate and a second fixing plate; the spot lamp, the rotating disc and the phototube are located on the same horizontal line, and the spot lamp, the filter lens and the phototube are detachably installed on a deck plate on the upper portion of the box body. According to the utility model, white light emitted by the spotlight can be received by the photoelectric tube after passing through the filter lenses with different colors by rotating the rotating disc, the whole demonstration device can be stably used for a long time, the cutoff frequency phenomenon of the photoelectric effect is demonstrated through polychromatic light, and meanwhile, the box body and the cover body are combined to meet the requirement of the device for long-term mobile itinerant exhibition.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of science and education display device, concretely relates to a photoelectric effect display device. BACKGROUND

[0002] Photoelectric effect is an important phenomenon in physics, refers to when the surface of certain substance is irradiated by electromagnetic wave (usually light wave) higher than a certain frequency, the electron inside the substance absorbs enough energy, will overcome the surface gravity of the substance and escape, form electron flow, and then produce electric current, this phenomenon is called photoelectric effect. Photoelectric effect not only reveals the particle nature of light, but also provides an important experimental basis for the development of quantum mechanics. In order to help students understand the principle of photoelectric effect more intuitively, photoelectric effect demonstration teaching aid is usually used in teaching.

[0003] In the existing photoelectric effect demonstration instrument, two ways of irradiating zinc plate with ultraviolet lamp or irradiating photosensitive tube with light source are usually used to display photoelectric effect phenomenon: the first method is that zinc plate is easy to be oxidized in long-term use process, so that the reactivity of the metal surface to light is reduced, thereby the phenomenon of photoelectric effect becomes not obvious or completely cannot be observed, frequent maintenance or replacement of zinc plate is needed, which increases the maintenance cost and operation complexity of experiment, reduces the stability and reliability of the instrument; the second method is that the material of photosensitive tube is relatively stable and is not easy to be affected by oxidation and can be used for a long time, but the core principle of photoelectric effect cannot be accurately displayed, and the relationship between the frequency, light intensity and other parameters in photoelectric effect cannot be intuitively demonstrated. SUMMARY

[0004] The utility model discloses a photoelectric effect display device.

[0005] The utility model discloses a photoelectric effect display device.

[0006] The spotlight, the light filter and the phototube are arranged on the same horizontal line.

[0007] The light filter is arranged in the inner part of the rotating disc.

[0008] The spotlight, the rotating disc and the phototube are arranged on the same horizontal line.

[0009] The utility model discloses a photoelectric effect display device.

[0010] As further description of the above technical solutions, the rotating disc is installed on the table panel through a filter lens support, and a protractor is installed inside the filter lens support.

[0011] As further description of the above technical solutions, the protractor is detachably connected with the rotating disc through a bearing seat and the rotating disc, and a rotating bearing is arranged inside the protractor.

[0012] As further description of the above technical solutions, one side of the protractor is abutted with the filter lens support through a compression spring and a steel ball, and the inside of the protractor is abutted with a clasp spring and the rotating shaft.

[0013] As further description of the above technical solutions, the edge of the rotating disc is exposed outside the cover through a leakage groove in the side of the cover.

[0014] As further description of the above technical solutions, the spotlight is installed on the table panel through a support frame.

[0015] As further description of the above technical solutions, a support tube is installed below the photoelectric tube, and a photoelectric tube support is installed outside the support tube.

[0016] As further description of the above technical solutions, an ammeter is installed on the table panel, and a button is installed on one side of the ammeter.

[0017] As further description of the above technical solutions, an instruction board is installed below the table panel.

[0018] The beneficial effects of the present application are as follows:

[0019] The present application can make the white light emitted by the spotlight be received by the photoelectric tube after passing through the filter lens of different colors, the whole demonstration device can be used stably for a long time, the existence of the cutoff frequency phenomenon of the photoelectric effect is demonstrated through the multi-color light, and the combination of the box body and the cover body is adopted to adapt to the needs of long-term mobile exhibition of the device.

[0020] In order to more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the front view of the photoelectric effect display device of the present application;

[0022] Figure 2 is the top view of the photoelectric effect display device of the present application;

[0023] Figure 3 is the front view of the table panel of the present application;

[0024] Figure 4 isFigure 1 Enlarged view of A-A in the middle;

[0025] Figure 5 is Figure 1 Enlarged view of B-B in the middle;

[0026] Figure 6 is Figure 1 Enlarged view of C-C in the middle;

[0027] Figure 7 is the side view of the first fixed plate of the utility model;

[0028] Figure 8 is the side view of the second fixed plate of the utility model;

[0029] Figure 9 is the top view of the table panel of the utility model;

[0030] Figure 10 is the front view of the table shield of the utility model;

[0031] Figure 11 is the front view of the filter lens support of the utility model;

[0032] Figure 12 is the side view of the index plate of the utility model;

[0033] Figure 13 is the side view of the bearing seat of the utility model

[0034] Figure 14 is the front view of the support pipe of the utility model;

[0035] Figure 15 is the front view of the photoelectric tube support of the utility model;

[0036] Figure 16 is the electrical schematic diagram of the photoelectric effect display device of the utility model.

[0037] Reference signs:

[0038] 1, spotlight; 2, filter lens; 3, photoelectric tube; 4, rotating disc; 41, first fixed plate; 42, second fixed plate; 5, box body; 6, table panel; 7, shield; 8, filter lens support; 9, index plate; 10, bearing seat; 11, rotating bearing; 12, compression spring; 13, steel ball; 14, snap spring; 15, rotating shaft; 16, support frame; 17, support pipe; 18, photoelectric tube support; 19, ammeter; 20, button; 21, instruction board. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment.

[0040] As shown in the drawings, in one embodiment, a photoelectric effect display device comprises a spotlight 1, a filter 2 and a phototube 3. Figures 1-16

[0041] The shafts of the spotlight 1, the rotating disc 4 and the phototube 3 are accurately designed and kept on the same horizontal line, can be conveniently disassembled and installed on the tabletop 6 on the upper part of the box 5, greatly improving the flexibility and operability of the equipment, and the position of each component can be adjusted as needed to optimize the experimental results and meet the requirements of different experimental configurations.

[0042] Specifically, the box 5 is made of high-strength ABS engineering plastic and has excellent impact resistance and weather resistance, can maintain the stability of the structure and the integrity of the appearance during long-term use, is convenient to carry and transport, can effectively reduce the damage risk caused by transportation and operation process, ensures the long service life of the equipment, is suitable for the needs of frequent mobile exhibition of the equipment, and can cope with various display environments and conditions.

[0043] Further, the spotlight 1 is installed on the tabletop 6 through the support frame 16, so that the spotlight 1 can accurately project light in the experiment; the rotating disc 4 is installed on the tabletop 6 through the filter lens support 8, so that the rotating disc 4 can stably and smoothly rotate during the experiment; and the phototube 3 is installed on the tabletop 6 through the phototube 3 support, so as to ensure the stability of the phototube 3.

[0044] In addition, the spotlight 1, the filter 2 and the phototube 3 are externally provided with a protective cover 7 made of transparent acrylic material, which can effectively prevent dust and oil stains from accumulating and effectively avoid damage caused by human touch; the protective cover 7 is provided with a leakage groove, the edge of the rotating disc 4 passes through the leakage groove on the side of the protective cover 7 to be exposed outside the protective cover 7, so that the operator can easily rotate the rotating disc 4 without removing the protective cover 7 during the experiment, avoiding additional operation trouble, and the protective cover 7 can still provide comprehensive protection for the spotlight 1, the filter 2 and the phototube 3.

[0045] Please continue to refer to Figures 1-15 In this embodiment, the filter 2 is fixed in the rotating disc 4 at an equal angle, and the filter 2 has eight color specifications of red, orange, yellow, green, blue, purple, gray and black. These filters 2 can accurately separate the white light emitted by the spotlight 1 into different monochromatic light according to the needs, so as to be received by the phototube 3, meeting the light source requirements of different experimental needs.

[0046] ​The rotating disc 4 is composed of a first fixed plate 41 and a second fixed plate 42, which are superimposed by precise design and assembly to clamp the light filter 2 in the cylindrical cavity of the rotating disc 4. This structural design ensures that the light filter 2 is firmly fixed in position during rotation and will not deviate due to vibration or external force, thereby ensuring high precision and repeatability of each measurement in the experiment.

[0047] Further, the filter lens holder 8 is internally provided with a protractor 9, which is detachably connected with the rotating disc 4 through a bearing seat 10, facilitating disassembly and maintenance. The protractor 9 is internally provided with a rotating bearing 11, which greatly reduces the friction and ensures smoothness and precision of rotation. The protractor 9 is abutted with the filter lens holder 8 on one side through a compression spring 12 and a steel ball 13, and is abutted internally through a snap spring 14 and a rotating shaft 15, further enhancing the stability of the structure and ensuring the stability and accuracy of the light filter 2 during rotation, avoiding angle deviation caused by friction or external force.

[0048] Further, the phototube 3 is provided below with a support tube 17, and the support tube 17 is externally provided with a phototube holder 18, avoiding the displacement of the phototube 3 during the experiment.

[0049] Please continue to refer to Figure 1 and Figure 16 In this embodiment, the table panel 6 is provided with an ammeter 19 for displaying the current change generated under different color light irradiation in real time. The ammeter 19 is provided on one side with a button 20, which can be pressed by the operator to start the demonstration experiment. The table panel 6 is provided below with an instruction board 21 for explaining the principle of the experiment, the required experimental conditions and the operation steps, helping the user to accurately understand the purpose and method of the experiment.

[0050] Please continue to refer to Figure 16 , the working principle is explained in combination with the electrical schematic diagram of the present application:

[0051] Exemplarily, the spotlight 1 is a white light lamp with a power of 20W, which provides stable and sufficient light source. The phototube 3 is a GD28 type phototube, which is a photoelectric element with high sensitivity and wide spectral response range, with a spectral response range of 0.35μm-0.65μm and a light sensitivity of 42μA / lm, which can effectively respond to light in the wavelength range from ultraviolet to red light and generate corresponding current signals according to the intensity of light. The digital ammeter 19 is used to measure the current, with a range of 200μA and a high precision of 0.1μA.

[0052] The photoelectric tube 3 is connected with the ammeter 19, the photoelectric tube 3 generates current after receiving light, which can be directly displayed on the ammeter 19, and the button 20 controls the spotlight 1 to be lighted through the time delay relay. After the button 20 is pressed, the time delay relay connects the power supply of the spotlight 1 to emit white light, then the white light is separated into single color light through the different color filters 2 and is received by the photoelectric tube 3, and the ammeter 19 can display different size of current or no current, so as to demonstrate the cutoff frequency phenomenon in the photoelectric effect; after reaching the set time, the power supply of the spotlight 1 is automatically disconnected; the power supply of the spotlight 1 is connected again by pressing the button 20 again, so as to avoid that the spotlight 1 is always on when no one operates, which affects the service life of the device.

[0053] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photoelectric effect display device, characterized in that, Include: The spotlight (1), filter (2) and phototube (3); The filter (2) is equiangular ring fixed in the inside of the rotating disc (4), the rotating disc (4) includes first fixed plate (41) and second fixed plate (42); The spotlight (1), the rotating disc (4) and the phototube (3) axial center are in same horizontal line, the spotlight (1), the filter (2) and the phototube (3) can be detachably installed on the tabletop board (6) of the upper portion of the box (5).

2. The photoelectric effect demonstration apparatus of claim 1, wherein The outside of the spotlight (1), the filter (2) and the phototube (3) are provided with the shield (7), the shield (7) is provided with the leakage groove.

3. The photoelectric effect demonstration apparatus of claim 1, wherein The rotating disc (4) is installed on the tabletop board (6) through the filter lens support (8), the filter lens support (8) is internally provided with the protractor (9).

4. The photoelectric effect display device according to claim 3, characterized by The protractor (9) is detachably connected through the bearing seat (10) and the rotating disc (4), the protractor (9) is internally provided with the rotating bearing (11).

5. The photoelectric effect demonstration apparatus of claim 3, wherein, One side of the protractor (9) is abutted with the filter lens support (8) through the compression spring (12) and the steel ball (13), the protractor (9) is internally abutted with the rotating shaft (15) through the snap spring (14).

6. The photoelectric effect demonstration apparatus of claim 1, wherein, The edge of the rotating disc (4) is exposed outside the shield (7) through the leakage groove of the side of the shield (7).

7. The photoelectric effect display device according to claim 1, wherein The spotlight (1) is installed on the tabletop board (6) through the support frame (16).

8. The photoelectric effect demonstration apparatus of claim 7, wherein, The phototube (3) is installed with the support tube (17) below, the support tube (17) is externally installed with the phototube support (18).

9. The photoelectric effect display device according to claim 1, wherein The tabletop board (6) is installed with the ammeter (19), one side of the ammeter (19) is installed with the button (20).

10. The photoelectric effect demonstration apparatus of claim 9, wherein, The tabletop board (6) is installed with the instruction board (21) below.

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