Laser sound transmission demonstration device based on energy regulation and control

Abstract

The utility model relates to a laser sound transmission demonstration device based on energy regulation and control. The laser sound transmission demonstration device comprises a transmitting device, a light energy adjusting device, an exhibition stand and a receiving device. A preset sound source or real-time sound recorded by a microphone is selected as a sound source, and the sound source is modulated by an acousto-optic modulator, converted into an optical signal and emitted from a laser. When the laser passes through the diffraction grating with the pattern, a specific diffraction pattern is generated, and meanwhile, sound information is carried for continuous transmission. When the light passes through the light energy adjusting device, due to the characteristics of the polaroid, the diffraction pattern presented on the receiving screen can be observed from bright to dark or from dark to bright by changing the angle between the rotating polaroid and the fixed polaroid. Meanwhile, the laser carrying the sound information is transmitted to the receiver, the light information is restored into the sound information through the demodulator, and audiences can hear the sound output by the loudspeaker. In the process, the diffraction pattern brightness and the sound volume change synchronously, namely, the pattern brightness changes from large to small to cause the sound volume to change from large to small, and the pattern brightness changes from small to large to cause the sound volume to change from small to large, so that the laser sound transmission energy can be changed in real time, and the influence of light energy on laser sound transmission can be visually displayed. And a visual effect is generated in the laser sound transmission process.

Description

Technical Field

[0001] The present invention relates to the field of popular science display devices, and particularly to a laser sound transmission demonstration device based on energy regulation. Background Art

[0002] Currently, in popular science displays, the display method of the laser sound transmission principle is relatively single, making it difficult for audiences to understand the influence of the light energy magnitude on laser sound transmission. Conventional laser sound transmission devices usually cannot regulate the energy in the light sound transmission process in real time and cannot visually display the relationship between sound and light. Based on the existing technology, the present invention adds a diffraction grating and a light energy regulating device to achieve visualization and real-time adjustment of the laser sound transmission energy, visually display the linear relationship between light energy and volume, and enhance the learning experience of audiences. Utility Model Content

[0003] The purpose of the present invention is to provide a more intuitive and vivid laser sound transmission demonstration device based on energy regulation.

[0004] The technical solution of the present invention is that the structure of a laser sound transmission demonstration device based on energy regulation includes a transmitting device, a light energy regulating device, a display stand, and a receiving device; the transmitting device is located at the upper left end of the display stand and is fixedly connected to the display stand through an acousto-optic modulator. The laser emitted by the transmitting device forms a diffraction pattern on the receiving device after passing through the light energy regulating device; the light energy regulating device is located in the middle of the display stand and is fixedly connected to the display stand through a bracket; the receiving device is located at the right end of the display stand and is fixedly connected to the display stand.

[0005] The transmitting device includes an acousto-optic modulator, a sound source device, a microphone, a laser, and a diffraction grating.

[0006] The acousto-optic modulator converts the sound signal of the sound source into an optical signal.

[0007] The sound source device is used to store prefabricated sound sources.

[0008] The microphone is used to collect on-site sound sources in real time.

[0009] The laser is used to emit the optical signal modulated by the acousto-optic modulator.

[0010] The diffraction grating is used to form a diffraction pattern with a circular light spot in the center and concentric bright and dark rings distributed around it by diffracting the optical signal emitted by the laser. The diffraction grating can be replaced according to the required pattern.

[0011] The light energy regulating device includes a rotating polarizer, a turntable bearing, a fixed polarizer, and a bracket.

[0012] The rotating polarizer is an annular device that can rotate arbitrarily within the range of 0° - 360°. The center is a polarizer, and the annular outer frame is provided with angle marks. The center position coincides with the laser optical axis.

[0013] The turntable bearing is divided into an outer ring and an inner ring. The outer ring is fixedly connected to the bracket, and the inner ring can rotate arbitrarily within the range of 0° - 360° and is fixedly connected to the rotating polarizer by screws.

[0014] The fixed polarizer is an annular device. The center is a polarizer, which is located on the right side of the turntable bearing and is concentrically and fixedly connected to the outer ring of the turntable bearing. An arrow indication mark is set at the top edge. When the rotating polarizer rotates, the arrow indication mark can identify the rotated angle. The fixed polarizer is slightly larger than the rotating polarizer.

[0015] The receiving device includes a receiving screen, a receiver, a demodulator, and a speaker.

[0016] The receiving screen is used to receive the diffraction pattern formed by the laser passing through the diffraction grating. It is located above the demodulator and fixedly connected to the demodulator. The receiving screen is coaxial with the rotating polarizer and is slightly smaller than the rotating polarizer.

[0017] The receiver is located at the center of the receiving screen and is used to receive the optical signal carrying sound information emitted by the laser.

[0018] The demodulator is to convert the optical signal carrying sound information received by the receiver back into a sound signal.

[0019] The speaker is to play out the sound signal converted by the demodulator.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. A light energy adjustment device is added. By different angle combinations of the rotating polarizer and the fixed polarizer, the light flux of the laser beam is changed, the transmitted energy is controlled, and then the size of the transmitted sound is changed, realizing the real-time control of the laser sound transmission energy, establishing a linear relationship between light energy and sound, increasing the intuitiveness of the exhibit, and enhancing the sense of participation of the audience.

[0022] 2. In order to more intuitively feel the linear relationship between the transmitted energy and the sound size, the present invention adds a diffraction grating. When the rotating polarizer rotates with an increasing angle within the range of 0° - 90°, the diffraction pattern appearing on the receiving device changes from bright to dark and the output sound changes from large to small; when the rotating polarizer rotates with an increasing angle within the range of 90° - 180°, the diffraction pattern changes from dark to bright and the output sound changes from small to large; it changes reciprocally with a period of 90°, visualizing the energy in the laser sound transmission process and increasing the interest of the exhibit.

[0023] 3. The diffraction grating has several styles that can be freely replaced, and the sound source device can store several preset sound sources, increasing the expandability of the exhibit and making it suitable for different application scenarios.

[0024] 4. The device of the present invention has a simple structure and is easy to operate. It has flexible volume variability, meeting large-scale popular science exhibitions and small-scale lightweight exhibitions, and is suitable for various popular science venues and educational institutions. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of a laser sound transmission demonstration device based on energy regulation.

[0026] Figure 2 It is a schematic structural diagram of the transmitting device of a laser sound transmission demonstration device based on energy regulation.

[0027] Figure 3 It is a schematic structural diagram of the light energy adjustment device of a laser sound transmission demonstration device based on energy regulation.

[0028] Figure 4 It is a schematic structural diagram of the receiving device of a laser sound transmission demonstration device based on energy regulation.

[0029] Among them, 1. Transmitting device, 11. Acousto-optic modulator, 12. Sound source device, 13. Microphone, 14. Laser, 15. Diffraction grating; 2. Light energy adjustment device, 21. Rotating polarizer, 22. Turntable bearing, 23. Fixed polarizer, 24. Bracket; 3. Exhibition stand; 4. Receiving device, 41. Receiving screen, 42. Receiver, 43. Demodulator, 44. Speaker. Detailed Embodiments

[0030] As Figure 1 shown, a laser sound transmission demonstration device based on energy regulation is characterized in that the structural composition of a laser sound transmission demonstration device based on energy regulation includes a transmitting device 1, a light energy adjustment device 2, an exhibition stand 3, and a receiving device 4; the transmitting device 1 is located at the upper left end of the exhibition stand 3 and is fixedly connected to the exhibition stand 3 through an acousto-optic modulator 11. The laser emitted by the transmitting device 1 presents a diffraction pattern on the receiving device 4 after passing through the light energy adjustment device 2; the light energy adjustment device 2 is located in the middle of the exhibition stand 3 and is fixedly connected to the exhibition stand 3 through a bracket 24; the receiving device 4 is located at the right end of the exhibition stand 3 and is fixedly connected to the exhibition stand 3.

[0031] As Figure 2 shown, the transmitting device 1 includes an acousto-optic modulator 11, a sound source device 12, a microphone 13, a laser 14, and a diffraction grating 15.

[0032] The acousto-optic modulator 11 converts the sound signal of the sound source into an optical signal.

[0033] The described sound source device 12 is used to store prefabricated sound sources.

[0034] The described microphone 13 is used to collect on-site sound sources in real time.

[0035] The described laser 14 is used to emit the optical signal modulated by the acousto-optic modulator 11.

[0036] The described diffraction grating 15 is used to form a diffraction pattern with a circular spot at the center and concentric bright and dark rings distributed around it by diffracting the optical signal emitted by the laser 14. The diffraction grating 15 can be replaced according to the required pattern.

[0037] As Figure 3 As shown, the described light energy adjustment device 2 includes a rotating polarizer 21, a turntable bearing 22, a fixed polarizer 23, and a bracket 24.

[0038] The described rotating polarizer 21 is an annular device that can rotate arbitrarily within the range of 0° - 360°. The center is a polarizer, and the annular outer frame is provided with angle marks. The center position coincides with the laser optical axis.

[0039] The described turntable bearing 22 is divided into an outer ring and an inner ring. The outer ring is fixedly connected to the bracket 24, and the inner ring can rotate arbitrarily within the range of 0° - 360° and is fixedly connected to the rotating polarizer 21 by screws.

[0040] The described fixed polarizer 23 is an annular device with a polarizer at the center. It is located on the right side of the turntable bearing 22 and is fixedly connected concentrically with the outer ring of the turntable bearing 22. An arrow indication mark is set at the top edge. When the rotating polarizer 21 rotates, the arrow indication mark can identify the rotated angle. The fixed polarizer 23 is slightly larger than the rotating polarizer 21.

[0041] As Figure 4 As shown, the described receiving device 4 includes a receiving screen 41, a receiver 42, a demodulator 43, and a speaker 44.

[0042] The described receiving screen 41 is used to receive the diffraction pattern formed by the laser passing through the diffraction grating 15. It is located above the demodulator 43 and is fixedly connected to the demodulator 43. The receiving screen 41 is coaxial with the rotating polarizer 21 and is slightly smaller than the rotating polarizer 21.

[0043] The described receiver 42 is located at the center of the receiving screen 41 and is used to receive the optical signal carrying sound information emitted by the laser 14.

[0044] The described demodulator 43 is used to convert the optical signal carrying sound information received by the receiver 42 back into a sound signal.

[0045] The described speaker 44 is used to play out the sound signal converted by the demodulator 43.

[0046] Specific implementation cases:

[0047] When working, after turning on the device, select a preset sound source or use a microphone to record real-time sound as the sound source. After being modulated by the acou-optical modulator, the sound source is converted into an optical signal and emitted from the laser. When the laser passes through the diffraction grating with a pattern, a specific diffraction pattern is generated and continues to transmit while carrying the sound information. When passing through the light energy adjustment device, due to the characteristics of the polarizer, by changing the angle between the rotating polarizer and the fixed polarizer, it can be observed that the diffraction pattern presented on the receiving screen changes from bright to dark or from dark to bright. At the same time, the laser carrying the sound information is transmitted to the receiver, and the optical information is restored to sound information by the demodulator, and the audience can hear the sound output by the speaker. In this process, the brightness of the diffraction pattern and the volume of the sound change synchronously, that is, when the pattern brightness decreases from large to small, the sound volume also decreases from large to small, and when the pattern brightness increases from small to large, the sound volume also increases from small to large. The energy size of laser sound transmission can be changed in real time, intuitively demonstrating the influence of light energy on laser sound transmission and making the laser sound transmission process produce a visual effect.

[0048] Implementation case 1: After turning on the device, select a preset sound source or use a microphone to record real-time sound as the sound source. Turn the rotating polarizer to the 0° position. At this time, the polarization axes of the rotating polarizer and the fixed polarizer are parallel, and the maximum amount of light energy passes through. Subsequently, turn the rotating polarizer to the 90° position. At this time, the polarization axes of the rotating polarizer and the fixed polarizer are perpendicular, and due to the characteristics of the polarizer, the minimum amount of light energy passes through. That is, during the process of turning the rotating polarizer from 0° to 90°, the polarization axis of the rotating polarizer changes from parallel to perpendicular to the polarization axis of the fixed polarizer, resulting in the light energy passing through decreasing from large to small, the diffraction pattern changing from bright to dark, and the sound volume output by the speaker also decreasing from large to small. Similarly, during the process of turning the rotating polarizer from 180° to 270°, the phenomenon is the same as the above process.

[0049] Implementation case 2: After turning on the device, select a preset sound source or use a microphone to record real-time sound as the sound source. Turn the rotating polarizer to the 90° position. At this time, the polarization axes of the rotating polarizer and the fixed polarizer are perpendicular, and the minimum amount of light energy passes through. Subsequently, turn the rotating polarizer to the 180° position. At this time, the polarization axes of the rotating polarizer and the fixed polarizer are parallel, and due to the characteristics of the polarizer, the maximum amount of light energy passes through. That is, during the process of turning the rotating polarizer from 90° to 180°, the polarization axis of the rotating polarizer changes from perpendicular to parallel to the polarization axis of the fixed polarizer, resulting in the light energy passing through increasing from small to large, the diffraction pattern changing from dark to bright, and the sound volume output by the speaker also increasing from small to large. Similarly, during the process of turning the rotating polarizer from 270° to 360°, the phenomenon is the same as the above process.

Claims

1. A laser sound transmission demonstration device based on energy regulation, characterized in that: A laser sound transmission demonstration device based on energy regulation comprises a transmitting device, a light energy regulating device, a booth and a receiving device; the transmitting device is located at the upper left end of the booth and is fixedly connected to the booth via an acousto-optic modulator, and the laser emitted by the transmitting device presents a diffraction pattern on the receiving device after passing through the light energy regulating device; the light energy regulating device is located in the middle of the booth and is fixedly connected to the booth via a bracket; the receiving device is located at the right end of the booth and is fixedly connected to the booth.

2. The laser sound transmission demonstration device based on energy regulation according to claim 1, characterized in that: The transmitting device includes an acousto-optic modulator, a sound source device, a microphone, a laser, and a diffraction grating; The acousto-optic modulator is used to convert the sound signal of the sound source into an optical signal; The sound source device is used to store pre-made sound sources; The microphone is used to record live sound sources in real time; The laser is used to transmit the optical signal modulated by the acousto-optic modulator; The diffraction grating is used to diffract the light signal emitted by the laser to form a diffraction pattern with a circular light spot at the center and concentric rings of light and dark alternating around it. The diffraction grating can be replaced according to the required pattern.

3. The laser sound transmission demonstration device based on energy regulation according to claim 1, characterized in that: The light energy regulating device comprises a rotating polarizing plate, a rotating disk bearing, a fixed polarizing plate, and a bracket; The rotating polarizer is a ring-shaped device that can be rotated arbitrarily within the range of 0°-360°, with the polarizer at the center. The ring-shaped outer frame is provided with an angle mark, and the center position coincides with the laser optical axis; The turntable bearing is divided into an outer ring and an inner ring, the outer ring is fixedly connected to the bracket, and the inner ring can be rotated arbitrarily within the range of 0°-360° and is fixedly connected to the rotating polarizer through screws; The fixed polarizer is an annular device with the polarizer at the center, which is located on the right side of the turntable bearing and is fixedly connected concentrically with the outer ring of the turntable bearing. An arrow indicator mark is set on the top edge. When the rotating polarizer rotates, the arrow indicator mark can mark the rotation angle. The fixed polarizer is slightly larger than the rotating polarizer.

4. The laser sound transmission demonstration device based on energy regulation according to claim 1, characterized in that: The receiving device includes a receiving screen, a receiver, a demodulator, and a speaker; The receiving screen is used to receive the diffraction pattern formed by the laser through the diffraction grating, and is located above the demodulator and fixedly connected to the demodulator. The receiving screen is coaxial with the rotating polarizer and is slightly smaller than the rotating polarizer. The receiver is located at the center of the receiving screen and is used to receive the optical signal carrying sound information emitted by the laser; The demodulator is used to convert the optical signal carrying the sound information received by the receiver into a sound signal again; The loudspeaker is used to play the sound signal converted by the demodulator.

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