Laser wavelength measuring device
By designing an adjustable laser wavelength measurement device, the problem of inaccurate measurement in dim environments of double-slit interference experiments is solved, and high-precision and convenient laser wavelength measurement are achieved.
Patent Information
- Application Number
- CN202411773864.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-04-04
AI Technical Summary
The existing double-slit interference experiments require a dim environment when measuring laser wavelengths and are susceptible to the influence of surrounding lamp sources, resulting in inaccurate measurements and inconvenient operation.
A laser wavelength measurement device is designed, including a laser emitter to be measured, a double-slit plate and a display screen. Through sliding installation and adjustable design, the positions of the double-slit plate and display screen can be adjusted in a dim environment to form bright light and dark stripes, and the stripe spacing is measured using a laser rangefinder and reflector to calculate the laser wavelength.
It realizes high-precision measurement of laser wavelengths in dim environments, reduces the impact of surrounding lights, simplifies the operation process, and can test the accuracy of laser wavelengths under various variable data.
Smart Images
Figure CN119756611A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of wavelength measurement, in particular to a laser wavelength measurement device. Background Art
[0002] At present, an important feature of laser is that it is monochromatic light, that is, the wavelength is very pure and has only one clear frequency. By measuring the wavelength, the monochromaticity and purity of the laser can be evaluated. In optical communications, lasers of different wavelengths are used to realize multi-wavelength discrete multiplexing (WDM) technology. In the field of laser medicine, the choice of wavelength is crucial to the treatment effect. At present, the simplest way to measure wavelength is the double-slit interference experiment. The double-slit interference experiment is a classic physical experiment. In the experiment, the test environment needs to be kept dim, and attention needs to be paid to the surrounding light sources. The light beams of the surrounding light sources are easy to affect the imaging of light and dark stripes. The dim test environment is not convenient for accurately measuring the spacing of light and dark stripes, and the distance between the double slits and the spacing from the double slit plate to the display screen need to be adjusted to obtain the accuracy of the wavelength data under different variable data. Improvements need to be made. Therefore, we propose a laser wavelength measurement device. Summary of the invention
[0003] The purpose of the present invention is to provide a laser wavelength measurement device to solve the problems raised in the background technology.
[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a laser wavelength measuring device, comprising a laser emitter to be measured, a double-slit plate and a display screen, wherein the laser emitter to be measured, the double-slit plate and the display screen are all slidably mounted on the surface of a base, a laser rangefinder and a reflector are slidably mounted on the top of the display screen, a sliding seat A slidably mounted on the top of the display screen is provided at the bottom of the laser rangefinder, an indicator mark A affixed to the surface of the display screen is provided at the bottom of the sliding seat A, a sliding seat B slidably mounted on the top of the display screen is provided at the bottom of the reflector, an indicator mark B affixed to the surface of the display screen is provided at the bottom of the sliding seat B, a cover body is movably mounted on the top of the base, an observation port for observing the display screen is provided through the top of the cover body, a transverse groove is provided on the top of the cover body, and a lever A for adjusting the lateral position of the laser rangefinder and a lever B for adjusting the lateral position of the reflector are slidably embedded in the interior of the transverse groove.
[0005] As a preferred implementation scheme of the technical solution of the present application, a T-slot is provided in the middle of the base, a column is fixedly provided at the bottom of the laser emitter to be tested, a double-seam plate is clamped inside the U-shaped holder A, a display screen is clamped inside the U-shaped holder B, and the bottoms of the column, U-shaped holder A and U-shaped holder B are respectively fixedly connected to separate I-shaped slides, and limiting bolts are threadedly connected to the surface of the I-shaped slide.
[0006] As a preferred implementation of the technical solution of the present application, a T-shaped cross rail is fixedly arranged horizontally on the top of the display screen, and the bottom of the sliding seat A and the sliding seat B are provided with a rectangular groove for slidingly engaging with the top of the display screen, and the top of the rectangle is provided with a matching groove for being inlaid and connected with the T-shaped cross rail.
[0007] As a preferred implementation scheme of the technical solution of the present application, a square hole seat is fixedly provided at one end of the sliding seat A and the sliding seat B, and the lever A and the lever B are composed of a horizontal bar seat and a vertical rod. The vertical rods of the lever A and the lever B are respectively inlaid and matched with the square hole seats of the sliding seat A and the sliding seat B.
[0008] As a preferred implementation of the technical solution of the present application, the transmitting end of the laser rangefinder matches the position of the indicator A, and the reflecting plate matches the position of the indicator B.
[0009] As a preferred implementation of the technical solution of the present application, a display electrically connected to the laser rangefinder is fixedly arranged on the top surface of the cover body, and the display has a built-in processor for processing the distance measurement data of the laser rangefinder.
[0010] As a preferred implementation of the technical solution of the present application, the observation port is an inclined rectangular shell, and plane mirrors are provided at both ends of the rectangular shell.
[0011] As a preferred implementation of the technical solution of the present application, the bottom end of the observation port faces the display end of the display screen, and the inclination angle of the observation port is set to 35° to 45°.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] The technical solution of the present application adjusts the display screen to distinct light and dark stripes through the adjustable position of the double-slit plate and the display screen. The double-slit plate and the display screen are adjustable, and the accuracy of the laser wavelength data under multiple variable data can be tested. A cover is placed above the base to create a dim environment to avoid the influence of indoor lights on the double-slit interference experiment. The position of the laser rangefinder and the reflector is moved by a lever to directly measure the spacing data of the light and dark stripes inside the cover. The necessary parameters for calculating the laser wavelength data can be measured in dim light without opening the cover. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:
[0015] Figure 1 The schematic diagram of the installation of the laser transmitter to be tested, the double-slit plate, the display screen and the base;
[0016] Figure 2 is the external structure diagram of the cover;
[0017] Figure 3 is a cross-sectional view of a laser wavelength measuring device;
[0018] Figure 4 It is a schematic diagram of the structure of the laser rangefinder and the sliding seat;
[0019] Figure 5 It is a structural schematic diagram of a reflector and a sliding seat;
[0020] Figure 6 It is the assembly diagram of I-shaped slide and T-slot.
[0021] In the figure: 1. base; 101. T-slot; 2. laser transmitter to be tested; 3. double-slot plate; 301. double-slot; 4. display screen; 5. column; 6. U-shaped holder A; 7. U-shaped holder B; 8. laser rangefinder; 801. sliding seat A; 802. indicator A; 9. reflector; 901. sliding seat B; 902. indicator B; 10. cover; 11. lever A; 12. lever B; 13. horizontal groove; 14. observation port; 15. display; 16. matching groove; 17. square hole seat; 18. I-shaped sliding seat. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0023] Embodiment 1, as Figure 1-6 As shown, the present invention provides a technical solution: a laser wavelength measuring device, comprising a laser emitter 2 to be measured, a double-slit plate 3 and a display screen 4, the laser emitter 2 to be measured, the double-slit plate 3 and the display screen 4 are all slidably mounted on the surface of a base 1, a laser rangefinder 8 and a reflector 9 are slidably mounted on the top of the display screen 4, a sliding seat A801 slidably mounted on the top of the display screen 4 is arranged at the bottom of the laser rangefinder 8, an indicator mark A802 that is in contact with the surface of the display screen 4 is arranged at the bottom of the sliding seat A801, and a sliding seat B901 slidably mounted on the top of the display screen 4 is arranged at the bottom of the reflector 9. An indicator mark B902 that fits with the surface of the display screen 4 is set at the bottom of the sliding seat B901, and a cover body 10 is movably installed on the top of the base 1. An observation port 14 for observing the display screen 4 is set through the top of the cover body 10. A transverse groove 13 is opened on the top of the cover body 10. A lever A11 for adjusting the lateral position of the laser rangefinder 8 and a lever B12 for adjusting the lateral position of the reflector 9 are slidably embedded in the transverse groove 13. A display 15 electrically connected to the laser rangefinder 8 is fixedly set on the top surface of the cover body 10, and the display 15 has a built-in processor for processing the distance measurement data of the laser rangefinder 8.
[0024] In a specific embodiment of the present invention, the column 5, the U-shaped holder A6 and the U-shaped holder B7 are all slid on the surface of the T-slot 101 through the I-shaped slide 18. After the positions of the laser emitter 2 to be tested, the double-slit plate 3 and the display screen 4 are determined, the limiting bolts of the I-shaped slide 18 are tightened to temporarily limit the positions of the laser emitter 2 to be tested, the double-slit plate 3 and the display screen 4. The cover body 10 is covered above the base 1, and then the vertical rods of the lever A11 and the lever B12 are respectively inlaid with the square hole seats 17 of the sliding seats A801 and the sliding seats B901, and the laser emitter 2 to be tested is started to emit laser. , the laser beam passes through the double slits 301 of the double slit plate 3, and distinct light and dark stripes are displayed on the display screen 4. The sliding seat A801 and the sliding seat B901 are respectively moved above the display screen 4 by the lever A11 and the lever B12, and the indicator A802 is vertically aligned with a bright stripe on the display screen 4, and the indicator B902 is vertically aligned with a bright stripe adjacent to the bright stripe. The laser rangefinder 8 cooperates with the reflector 9 to measure the distance data from the laser rangefinder 8 to the reflector 9, that is, the distance between two adjacent bright stripes of the light and dark stripes, and the measurement result is displayed on the display 15;
[0025] The calculation formula for measuring the wavelength in the double-slit interference experiment is: Δx=lλ / d, where: Δx represents the distance between the centers of two adjacent bright stripes (or dark stripes); l represents the distance from the double slit to the screen; λ represents the wavelength of the laser to be measured; d represents the distance between the double slits. The positions of the double-slit plate 3 and the display screen 4 are adjustable, and the display screen 4 is adjusted to distinct light and dark stripes. The positions of the double-slit plate 3 and the display screen 4 are adjustable, and the accuracy of the laser wavelength data under various variable data can be tested, that is, the distance from the double-slit plate 3 to the screen can be adjusted, and the distance between the double slits can also be adjusted by replacing double-slit plates 3 of different models, thereby testing the accuracy of the laser wavelength data under various variable data. The cover body 10 is covered above the base 1 to create a dim environment to avoid the influence of indoor light on the double-slit interference experiment.
[0026] In the preferred technical solution, a T-slot 101 is provided in the middle of the base 1, a column 5 is fixedly provided at the bottom of the laser emitter 2 to be tested, the double-slit plate 3 is clamped in the U-shaped holder A6, and the display screen 4 is clamped in the U-shaped holder B7. The bottoms of the column 5, the U-shaped holder A6, and the U-shaped holder B7 are respectively fixedly connected to separate I-shaped slides 18, and the surface of the I-shaped slide 18 is threadedly connected with limiting bolts. The U-shaped holder A6, the U-shaped holder B7 and the double-slit plate 3 and the display screen 4 are interference fit, which can be conveniently disassembled and assembled. Tightening the limiting bolts can be used to limit the positions of the laser emitter 2 to be tested, the double-slit plate 3 and the display screen 4.
[0027] In the preferred technical solution, a T-shaped cross rail is fixedly arranged horizontally on the top of the display screen 4, and rectangular grooves for sliding and snapping onto the top of the display screen 4 are provided at the bottom of the sliding seat A801 and the sliding seat B901, and a matching groove 16 for being embedded and connected with the T-shaped cross rail is provided at the top of the rectangle. The T-shaped cross rail is used to limit the sliding seat A801 and the sliding seat B901 to only move horizontally along the T-shaped cross rail and cannot vertically separate from the T-shaped cross rail.
[0028] In the preferred technical solution, a square hole seat 17 is fixedly provided at one end of the sliding seat A801 and the sliding seat B901, and the lever A11 and the lever B12 are composed of a horizontal bar seat and a vertical rod. The vertical rods of the lever A11 and the lever B12 are respectively inlaid and matched with the square hole seat 17 of the sliding seat A801 and the sliding seat B901. The lever A11 is used to move the sliding seat A801 to adjust the position of the laser rangefinder 8, and the lever B12 is used to move the sliding seat B901 to adjust the position of the reflecting plate 9, so that the distance between the laser rangefinder 8 and the reflecting plate 9 corresponds to the distance between two adjacent bright stripes (dark stripes).
[0029] In the preferred technical solution, the transmitting end of the laser rangefinder 8 matches the position of the indicator A802, that is, the indicator A802 and the transmitting end of the laser rangefinder 8 are located on the same vertical plane, and the reflecting plate 9 matches the position of the indicator B902, that is, the indicator B902 and the reflecting plate 9 are located on the same vertical plane.
[0030] In the preferred technical solution, the observation port 14 is an inclined rectangular shell with plane mirrors provided at both ends of the rectangular shell. The bottom end of the observation port 14 faces the display end of the display screen 4. The inclination angle of the observation port 14 is set to 35°. The inclined observation port 14 facilitates observation of the light and dark stripe images on the display screen 4.
[0031] Working principle: determine the positions of the laser emitter 2 to be tested, the double-slit plate 3 and the display screen 4, cover the cover body 10, and use the lever A11 and the lever B12 to respectively move the sliding seat A801 and the sliding seat B901 above the display screen 4, the indicator A802 is vertically aligned with a bright stripe on the display screen 4, and the indicator B902 is vertically aligned with a bright stripe adjacent to the bright stripe. The laser rangefinder 8 cooperates with the reflector 9 to measure the spacing data from the laser rangefinder 8 to the reflector 9, that is, the spacing between two adjacent bright stripes of the light and dark stripes. The measurement result is displayed on the display 15. By taking the average value of the measured data, the value of Δx is obtained, and then the wavelength value is obtained according to the formula. Then, a different type of double-slit plate 3 is replaced or the distance from the double-slit plate 3 to the screen is adjusted, the variable is adjusted, and Δx is obtained again to compare whether the wavelength values are the same or similar.
Claims
1. A laser wavelength measuring device, comprising a laser transmitter to be measured (2), a double-slit plate (3) and a display screen (4), characterized in that: The laser emitter (2) to be tested, the double-slit plate (3) and the display screen (4) are all slidably mounted on the surface of the base (1); a laser rangefinder (8) and a reflector (9) are slidably mounted on the top of the display screen (4); a sliding seat A (801) slidably mounted on the top of the display screen (4) is provided at the bottom of the laser rangefinder (8); an indicator mark A (802) affixed to the surface of the display screen (4) is provided at the bottom of the sliding seat A (801); and a sliding seat B (902) slidably mounted on the top of the display screen (4) is provided at the bottom of the reflector (9). 01), an indicator mark B (902) that is in contact with the surface of the display screen (4) is arranged at the bottom of the sliding seat B (901), a cover body (10) is movably mounted on the top of the base (1), an observation port (14) for observing the display screen (4) is arranged through the top of the cover body (10), a transverse groove (13) is arranged at the top of the cover body (10), and a lever A (11) for adjusting the lateral position of the laser rangefinder (8) and a lever B (12) for adjusting the lateral position of the reflector (9) are slidably embedded in the interior of the transverse groove (13).
2. A laser wavelength measurement device according to claim 1, characterized in that: A T-shaped slot (101) is provided in the middle of the base (1); a column (5) is fixedly provided at the bottom of the laser emitter (2) to be tested; the double-slit plate (3) is clamped inside the U-shaped clamping seat A (6); the display screen (4) is clamped inside the U-shaped clamping seat B (7); the bottoms of the column (5), the U-shaped clamping seat A (6), and the U-shaped clamping seat B (7) are respectively fixedly connected to separate I-shaped slide seats (18); and limiting bolts are threadedly connected to the surface of the I-shaped slide seat (18).
3. A laser wavelength measurement device according to claim 1, characterized in that: A T-shaped cross rail is fixedly arranged at the top of the display screen (4) in a transverse direction. The bottoms of the sliding seat A (801) and the sliding seat B (901) are provided with rectangular grooves for slidingly engaging with the top of the display screen (4). The top of the rectangle is provided with a matching groove (16) for being embedded and connected with the T-shaped cross rail.
4. A laser wavelength measurement device according to claim 1, characterized in that: A square hole seat (17) is fixedly provided at one end of the sliding seat A (801) and the sliding seat B (901); the shifting rod A (11) and the shifting rod B (12) are composed of a horizontal bar seat and a vertical rod; the vertical rods of the shifting rod A (11) and the shifting rod B (12) are respectively inlaid and matched with the square hole seat (17) of the sliding seat A (801) and the sliding seat B (901).
5. The laser wavelength measuring device according to claim 1, characterized in that: The transmitting end of the laser rangefinder (8) matches the position of the indicator mark A (802), and the reflecting plate (9) matches the position of the indicator mark B (902).
6. A laser wavelength measuring device according to claim 1, characterized in that: A display (15) electrically connected to the laser rangefinder (8) is fixedly arranged on the top surface of the cover body (10), and the display (15) has a built-in processor for processing distance measurement data of the laser rangefinder (8).
7. The laser wavelength measuring device according to claim 1, characterized in that: The observation port (14) is an inclined rectangular shell, and plane mirrors are arranged at both ends of the rectangular shell.
8. A laser wavelength measuring device according to claim 7, characterized in that: The bottom end of the observation port (14) faces the display end of the display screen (4), and the inclination angle of the observation port (14) is set to 35°-45°.