A digital helium-neon laser experiment platform

Abstract

The utility model relates to laser equipment technical field, concretely relates to a kind of digital helium-neon laser experimental platform.The utility model includes base, concave mirror, helium-neon laser discharge tube, plane mirror, collimating laser and two transmission structures, concave mirror, helium-neon laser discharge tube, plane mirror and collimating laser are sequentially installed on base, the center of concave mirror, helium-neon laser discharge tube, plane mirror and collimating laser is at the same level height, two transmission structures are installed on base, helium-neon laser discharge tube and plane mirror are respectively installed on two transmission structures.The utility model carries out fine control to helium-neon laser experiment using digital technology, simple operation, it is convenient to gather data.

Description

Technical Field

[0001] This utility model relates to the field of laser equipment technology, specifically to a digital helium-neon laser experimental platform. Background Technology

[0002] Helium-neon laser discharge tubes, as a classic gas laser, are widely used in numerous fields, including optical measurement, laser communication, and holography, due to their simple structure, excellent monochromaticity, high coherence, and strong stability. With the rapid development of China's economy, the demand for helium-neon lasers in industrial manufacturing, medical aesthetics, education, and scientific research is constantly increasing. Especially in industrial applications, the demand for high-precision, high-stability helium-neon laser platforms is strong, driving domestic companies to continuously improve product quality and performance to meet market demands.

[0003] Therefore, helium-neon laser experiments are essential knowledge for every optoelectronics student. Traditional helium-neon laser experiment teaching relies mainly on physical demonstrations and basic measurement tools, but this involves cumbersome operation, difficult data acquisition, and significant errors in experimental results. With the rapid development of information technology, digital technology is increasingly used in laser experiments, primarily through data acquisition, automated control, virtual simulation, and augmented reality (AR) to improve experimental effectiveness. For example, to detect laser power in real time, silicon photodiodes are used to detect laser power, and analog-to-digital conversion (ADC) is performed using an Arduino microcontroller or STM32 microcontroller before transmitting the data to a PC (such as Python / Matlab / LabVIEW) to display the power change curve in real time. Furthermore, to ensure optical path balance, a Michelson interferometer + photodetector + PZT adjustment can be used in experiments, with digital feedback controlling the optical path balance. Besides these two points, there are many other digital experimental techniques. However, due to limitations in cost, ease of use, and maintenance costs, experiments are often still conducted manually in campus teaching. Utility Model Content

[0004] The purpose of this invention is to solve the problems of cumbersome operation, difficult data acquisition, and large error in experimental results of existing helium-neon laser experimental platforms, and to propose a digital helium-neon laser experimental platform that uses digital technology to achieve precise control of helium-neon laser experiments, which is simple to operate and facilitates data acquisition.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A digital helium-neon laser experimental platform includes a base, a concave mirror, a helium-neon laser discharge tube, a plane mirror, a collimated laser, and two transmission structures. The concave mirror, helium-neon laser discharge tube, plane mirror, and collimated laser are sequentially mounted on the base, with their centers at the same horizontal level. The two transmission structures are mounted on the base, and the helium-neon laser discharge tube and plane mirror are respectively mounted on the two transmission structures.

[0007] Furthermore, the transmission structure includes a lead screw, a geared motor, a controller, and a movable platform. The lead screw passes through the movable platform and is connected to the movable platform via ball bearings and a reversing gear. Both ends of the lead screw are connected to the base via bearings, and one end of the lead screw is connected to the geared motor via a coupling. The geared motor is connected to the controller.

[0008] Furthermore, it also includes two optical rods. The two transmission structures include a first transmission structure and a second transmission structure. The first transmission structure includes a first lead screw and a first movable platform. The second transmission structure includes a second lead screw and a second movable platform. Both the first and second movable platforms have four through holes on the same horizontal plane along the moving direction for connecting with the first lead screw, the second lead screw, and the optical rod. The two optical rods pass through the through holes on both sides of the first and second movable platforms and are connected to the base. The first lead screw passes through the second movable platform, and the second lead screw passes through the first movable platform.

[0009] Furthermore, it also includes two fixed platforms, which are respectively fixed at both ends of the base, and the concave mirror and collimating laser are respectively mounted on the two fixed platforms.

[0010] Furthermore, the base has markings on one side.

[0011] Compared with the prior art, the significant advantages of this utility model are: (1) The geared motor and the transmission structure are connected by a coupling, which reduces the transmission speed, thereby reducing the error caused by operation and improving accuracy. (2) The speed and direction of the screw drive are controlled by the controller connected to the geared motor, realizing digital control. (3) The concave mirror, helium-neon laser discharge tube, plane mirror and collimating laser are fixed on the screw drive structure by a fixed platform and a movable platform, so that the centers of the four are at the same level, reducing the difficulty of experimental operation. Attached Figure Description

[0012] Figure 1 This is a side view of the overall structure of a digital helium-neon laser experimental platform according to this utility model;

[0013] Figure 2This is a top view of a digital helium-neon laser experimental platform according to the present invention.

[0014] Explanation of reference numerals in the attached diagram: 1. First geared motor; 2. Concave mirror; 3. Helium-neon laser discharge tube; 4. Plane mirror; 5. Collimating laser; 6. First controller; 7. Fixed platform; 8. First movable platform; 9. Second movable platform; 10. Optical rod; 11. First lead screw; 12. Second lead screw; 13. Second geared motor; 14. Second controller. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0016] To facilitate experimental teaching, this invention provides a digital helium-neon laser experimental platform, optimized and upgraded from a traditional experimental platform. After system debugging, this platform allows the laser cavity mirror to move stably back and forth on the platform as required, enabling related laser resonant cavity experiments. Simultaneously, the discharge tube can also move stably on its track as required, facilitating experiments with Gaussian beams and simplifying data acquisition.

[0017] like Figures 1-2 As shown, this utility model includes a base, a concave mirror 2, a helium-neon laser discharge tube 3, a plane mirror 4, a collimating laser 5, two fixed platforms 7, two optical rods 10, and two transmission structures. The concave mirror 2, the helium-neon laser discharge tube 3, the plane mirror 4, and the collimating laser 5 are used to realize experiments on laser resonant cavities and related Gaussian beams.

[0018] The concave mirror 2, helium-neon laser discharge tube 3, plane mirror 4, and collimating laser 5 are sequentially installed on the base. The centers of the concave mirror 2, helium-neon laser discharge tube 3, plane mirror 4, and collimating laser 5 are at the same horizontal height. Two fixed platforms 7 are fixed at both ends of the base, and the concave mirror 2 and collimating laser 5 are respectively installed on the two fixed platforms 7.

[0019] The system comprises two transmission structures: a first transmission structure and a second transmission structure. The first transmission structure includes a first lead screw 11, a first geared motor 1, a first controller 6, and a first movable platform 8. The second transmission structure includes a second lead screw 12, a second geared motor 13, a second controller 14, and a second movable platform 9. The first lead screw 11 passes through the first movable platform 8 and is connected to it via ball bearings and a reversing gear. Both ends of the first lead screw 11 are connected to the base via bearings, and one end of the first lead screw 11 is connected to the first geared motor 1 via a coupling. The first geared motor 1 is connected to the first controller 6. The second lead screw 12 passes through the second movable platform 9 and is connected to it via ball bearings and a reversing gear. Both ends of the second lead screw 12 are connected to the base via bearings, and one end of the second lead screw 12 is connected to the second geared motor 13 via a coupling. The second geared motor 13 is connected to the second controller 14.

[0020] Both the first movable platform 8 and the second movable platform 9 have four through holes on the same horizontal plane along the direction of movement, used for connecting to the first lead screw 11, the second lead screw 12, and the guide rod 10. The two guide rods 10 pass through the through holes on both sides of the first movable platform 8 and the second movable platform 9 and connect to the base, serving as support rods. The first lead screw 11 and the second through hole of the first movable platform 8 form a lead screw-ball drive structure using ball bearings and a direction changer. The second lead screw 12 passes directly through the third through hole of the first movable platform 8 without intermediate transmission, acting similarly to a support rod. Similarly, the second lead screw 12 and the third through hole of the second movable platform 9 form a lead screw-ball drive structure using ball bearings and a direction changer. The first lead screw 11 passes directly through the second through hole of the second movable platform 9, acting similarly to a support rod. The transmission can be achieved by two geared motors (first geared motor 1 and second geared motor 13) controlling the lead screws (first lead screw 11 and second lead screw 12) connected to each other. The helium-neon laser discharge tube 3 and the plane mirror 4 fixed on the first movable platform 8 and the second movable platform 9 can thus achieve independent movement to meet the experimental requirements.

[0021] The concave mirror 2 and the collimating laser 5 are fixedly mounted on two fixed platforms 7 respectively. The helium-neon laser discharge tube 3 is fixedly mounted on the first movable platform 8, and the plane mirror 4 is mounted on the second movable platform 9. Moreover, the fixed positions are all located at the center of the fixed platform 7, the first movable platform 8, and the second movable platform 9, which ensures that even if the two lead screws do not drive at the same time, the experimental equipment can be in the same horizontal position, reducing experimental errors.

[0022] In the helium-neon laser resonator experiment, the concave mirror 2 and collimating laser 5 are first placed on the fixed platform 7 and locked. Then, the collimating laser 5 is turned on, and the XY adjustment knob of the concave mirror 2 is adjusted so that the laser spot can illuminate the center of the concave mirror 2, and an interference phenomenon of flickering brightness appears.

[0023] Next, the helium-neon laser discharge tube 3 is placed on and fixed on the first movable platform 8. The helium-neon laser discharge tube 3 is finely adjusted so that the collimated laser can pass through the capillary without any distortion, and the output laser spot is basically the same as the input laser spot. Then, the plane mirror 4 is placed on the second movable platform 9 and fixed. The XY adjustment knob of the plane mirror 4 is adjusted so that clear concentric circular interference fringes can be seen on the white screen on the left side of the plane mirror 4.

[0024] Then, turn on the power supply of the helium-neon laser discharge tube 3 to discharge it, and turn off the collimating laser 5. The helium-neon laser discharge tube 3 will immediately start oscillating and output laser.

[0025] Finally, the controllers (first controller 6 and second controller 14) are operated to input the speed and direction of the two geared motors respectively, and the experimental data is measured and collected. This eliminates the need for manual sliding and improves the accuracy of the experiment.

[0026] Since the first lead screw 11 and the second through hole of the first movable platform 8 form a lead screw ball transmission structure using ball bearings and a direction converter, and the second lead screw 12 directly passes through the third hole of the first movable platform 8, forming a function similar to a support rod, controlling the transmission of the helium-neon laser discharge tube 3 will not cause the plane mirror 4 to move, thus meeting the experimental requirements and achieving independent control.

[0027] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A digital helium-neon laser experimental platform, characterized in that, The device includes a base, a concave mirror, a helium-neon laser discharge tube, a plane mirror, a collimating laser, and two transmission structures. The concave mirror, helium-neon laser discharge tube, plane mirror, and collimating laser are sequentially mounted on the base. The centers of the concave mirror, helium-neon laser discharge tube, plane mirror, and collimating laser are at the same horizontal height. The two transmission structures are mounted on the base, and the helium-neon laser discharge tube and plane mirror are respectively mounted on the two transmission structures.

2. The digital helium-neon laser experimental platform according to claim 1, characterized in that, The transmission structure includes a lead screw, a geared motor, a controller, and a movable platform. The lead screw passes through the movable platform and is connected to the movable platform via ball bearings and a reversing gear. Both ends of the lead screw are connected to the base via bearings, and one end of the lead screw is connected to the geared motor via a coupling. The geared motor is connected to the controller.

3. The digital helium-neon laser experimental platform according to claim 2, characterized in that, It also includes two optical rods. The two transmission structures include a first transmission structure and a second transmission structure. The first transmission structure includes a first lead screw and a first movable platform. The second transmission structure includes a second lead screw and a second movable platform. Both the first movable platform and the second movable platform have four through holes on the same horizontal plane along the moving direction for connecting with the first lead screw, the second lead screw and the optical rod. The two optical rods pass through the through holes on both sides of the first movable platform and the second movable platform and are connected to the base. The first lead screw passes through the second movable platform and the second lead screw passes through the first movable platform.

4. The digital helium-neon laser experimental platform according to claim 1, characterized in that, It also includes two fixed platforms, which are respectively fixed at both ends of the base, and the concave mirror and collimating laser are respectively mounted on the two fixed platforms.

5. The digital helium-neon laser experimental platform according to claim 1, characterized in that, The base has markings on one side.

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