Head-mounted optical broadcast communication method based on homogenized light beams

Abstract

According to the head-mounted optical broadcast communication method based on the homogenized light beam, a communication signal sender compiles information needing to be broadcasted and sent into a free space laser communication signal, and after power amplification, beam expansion and light spot homogenization are carried out through optical aperture processing; and a plurality of communication signal receivers are externally provided with high-sensitivity photoelectric detectors, and after the free space laser communication signals are received, the free space laser communication signals are interpreted into simple instructions to be transmitted to users. The method provided by the invention can effectively solve the broadcasting problem of one-way free space laser communication, a communication signal receiver can maintain the information receiving capability in an extreme environment only by externally arranging a photoelectric detector and a whole set of signal interpretation system, the scale deployment cost is low, and the method can be used as an important supplement of a radio broadcasting signal means and has a wide application prospect. The method plays an important role in earthquake search and rescue, emergency communication and the like.

Description

Technical Field

[0001] The present invention belongs to the interdisciplinary field of free-space laser communication and imaging optics, and specifically refers to a method for amplifying the power and homogenizing the light spot of free-space laser communication signals, sending the signals to all users wearing photodetectors in a specific area, and realizing optical broadcast communication, and more particularly to a head-mounted optical broadcast communication method based on a homogenized light beam. Background Art

[0002] Free-space laser communication has many advantages, such as strong collimation, large bandwidth, and strong anti-electromagnetic interference ability. It can be used as an important supplement to radio communication to provide communication services for multiple users within the line of sight. At present, there are three main bottlenecks that restrict free-space laser communication: First, free-space laser communication is susceptible to environmental interference. Various severe weather conditions such as atmospheric turbulence, rain, haze, etc. will affect the communication signal and greatly increase the bit error rate; second, free-space laser communication requires the use of a tracking and aiming system to establish a stable optical communication link. The longer the communication distance, the larger the caliber of the tracking and aiming system, and the greater the weight, volume, and mechanical control difficulty of the system; third, free-space laser communication has strong collimation, which is inherently inferior to traditional radio communication in terms of broadcast transmission capability.

[0003] Free-space laser communication includes two application modes: bidirectional communication and unidirectional communication. The unidirectional communication mode requires more anti-environmental disturbance, fast link establishment, and broadcast communication capabilities. A typical application is that if the radio communication channel is disturbed by strong solar activity and it is necessary to broadcast landing instructions to a group of drones performing a group performance, broadcast free-space laser communication will play an important role. Summary of the invention

[0004] In view of the above-mentioned defects, the technical problem to be solved by the present invention is how to effectively solve the broadcasting problem of unidirectional free-space laser communication.

[0005] In view of the above-mentioned defects, the purpose of the present invention is to provide a head-mounted optical broadcast communication method based on a homogenized light beam, in which the communication signal sender compiles the instructions to be sent on an optical carrier through a free-space laser communication signal transmitter, and outputs the instructions through power amplification, optical beam expansion, and beam homogenization; the communication signal receiver has an external photodetector, which can receive relevant signals when the communication signal is irradiated on the surface of the photodetector, and parse the plain text instructions through a simple signal compilation circuit.

[0006] In order to achieve the above-mentioned effects, the head-mounted optical broadcast communication method based on homogenized light beam provided by the present invention includes a communication signal sender and a receiver. The communication signal sender compiles the instructions to be transmitted into a free-space laser communication carrier, amplifies the power through a power amplifier, realizes the expansion of the light spot aperture through optical beam expansion, and shapes the originally Gaussian distributed light spot into a uniform distribution through beam homogenization. After the power amplification, the optical aperture processes the beam expansion and light spot homogenization so that it can illuminate all targets within a certain range and the power at each location is basically consistent. Multiple communication signal receivers are equipped with external photodetectors. When the homogenized light beam irradiates the photodetector, the built-in signal interpretation circuit will interpret the information according to the response of the photodetector and transmit the instructions to the signal receiver.

[0007] Preferably, the above method specifically comprises the following steps:

[0008] S101, broadcasting and sending of communication signals. The communication signal sender compiles the instructions to be transmitted into the free space laser communication carrier, amplifies the power through the power amplifier, expands the aperture of the light spot through optical beam expansion, and shapes the original Gaussian distribution of the light spot into a uniform distribution through beam homogenization;

[0009] S102, receiving communication signals. Multiple communication signal receivers have external photodetectors. When the homogenized light beam irradiates the photodetectors, the built-in signal interpretation circuit interprets the information according to the response of the photodetectors and transmits the instructions to multiple communication signals.

[0010] Preferably, in the above S102, when the homogenized light beam is irradiated to the photoelectric detector, it includes direct irradiation or irradiation after multiple diffuse reflections.

[0011] Preferably, when the receivers of the above-mentioned multiple communication signals are persons, they wear photoelectric detectors on their heads.

[0012] Preferably, the above method specifically includes:

[0013] S201, the communication signal sender compiles the instruction to be sent into the free space laser communication system, and the free space laser communication system outputs an intensity modulated or phase modulated laser communication signal;

[0014] S202, amplifying the power of the laser communication signal by a power amplifier;

[0015] S203, performing spot expansion on the output parallel light laser communication signal through an optical beam expansion system, and the lateral mode field distribution of the spot is Gaussian;

[0016] S204, optically shaping the output light field through an optical homogenization system, so that the output light field is transformed from a Gaussian mode field distribution to a step mode field distribution, that is, the power at each point within the beam range is approximately the same, and the power within the beam range decays rapidly to near zero;

[0017] S205, the communication signal sender illuminates a specific area using the expanded free-space laser communication signal, and multiple communication signal receivers in the area wear photoelectric detectors on their heads;

[0018] S206. After the free-space laser communication signal is irradiated to the photodetector, it causes a signal response. The signal interpretation circuit embedded in the photodetector converts it into text according to the signal response, and the communication signal receiver obtains the original instruction through human-computer interaction.

[0019] Preferably, the above-mentioned S206 free-space laser communication signal directly illuminates the photoelectric detector or illuminates the photoelectric detector after being diffusely reflected by an object.

[0020] Preferably, the sender of the communication signal compiles the instructions to be transmitted into the free space laser communication carrier, amplifies the power through a power amplifier, expands the light spot aperture through optical beam expansion, and shapes the originally Gaussian distributed light spot into a uniform distribution through beam homogenization.

[0021] Preferably, in the above S206, when the homogenized light beam irradiates the photodetector, the built-in signal interpretation circuit will interpret the information according to the response of the photodetector and transmit the instruction to the communication signal receiver.

[0022] Preferably, the sender of the communication signal compiles the instructions to be transmitted into a free-space laser communication signal and sends it to all targets within a certain area, and the receiver of the communication signal obtains information through a low-cost photoelectric detector and a decoding circuit.

[0023] The present invention provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the above method is implemented.

[0024] Compared with the prior art, the present invention achieves the following technical effects:

[0025] First, the present invention proposes a unidirectional broadcast all-optical communication method, which can meet some special application requirements, such as being affected by strong solar activity, interference in radio communication channels, and the need to broadcast landing instructions to a group of drones performing group performances;

[0026] Secondly, the method proposed by the present invention does not require a precise tracking system. The communication signal transmitting end can achieve communication signal coverage within a certain range through simple optical mode field conversion, and the communication signal receiving end only needs a highly sensitive photoelectric detector and a signal interpretation system to achieve signal reception.

[0027] Finally, the method proposed in the present invention can also provide a transmission means for an initial session protocol for free-space laser communication, improve the ability of all-optical communication networks to quickly establish links, and provide important support for their promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following briefly introduces the drawings required for use in the embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of an embodiment of a head-mounted optical broadcast communication method based on a homogenized light beam according to the present invention is shown;

[0030] Figure 2 A schematic diagram showing another embodiment of the head-mounted optical broadcast communication method based on homogenized light beams of the present invention is shown;

[0031] Figure 3 A schematic diagram of another embodiment of the head-mounted optical broadcast communication method based on homogenized light beams of the present invention is shown. DETAILED DESCRIPTION

[0032] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and Examples. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0034] The present invention provides an embodiment of a head-mounted optical broadcast communication method based on a homogenized light beam. The communication signal sender compiles the information to be broadcast into a free-space laser communication signal. After power amplification, the optical aperture processes the beam expansion and light spot homogenization so that it can illuminate all targets within a certain range and the power at each location remains basically consistent. Multiple communication signal receivers are equipped with external high-sensitivity photoelectric detectors. After receiving the free-space laser communication signal, they interpret it into simple instructions and convey them to the user.

[0035] In some embodiments, during the communication signal transmission process, the communication signal sender compiles the instructions to be transmitted into the free-space laser communication carrier, amplifies the power through the power amplifier, expands the spot aperture through optical beam expansion, and shapes the originally Gaussian-distributed spot into a uniform distribution through beam homogenization. The wavelength of the free-space laser communication carrier includes but is not limited to 810nm, 1550nm and other bands, the encoding method includes but is not limited to intensity encoding, phase encoding, polarization encoding, the power amplifier includes but is not limited to semiconductor amplifiers, erbium-doped fiber amplifiers, optical parametric amplifiers, fiber Raman amplifiers, etc., the optical beam expansion means include but are not limited to telescope structures or phased array structures, the beam homogenization method includes but is not limited to deformable mirror wavefront shaping, liquid crystal controlled wavefront shaping, etc., the spot distribution after beam expansion is not limited, and the working distance between the communication signal transmitter and the receiver and the far-field diffusion angle of the spot are not limited.

[0036] In some embodiments, during the communication signal reception process, multiple target users (communication signal receivers) have external photodetectors. When the homogenized light beam is irradiated to the photodetector, the built-in signal interpretation circuit will interpret the information according to the response of the photodetector and transmit the instruction to the target user. The free-space laser communication signal can directly irradiate the photodetector or irradiate the photodetector after diffuse reflection from an object. The communication signal receiver can be a drone or a person. The instructions compiled after reception can be transmitted to the communication signal receiver in the form of code, voice prompts, etc.

[0037] In some embodiments, in the optical broadcast communication method, the communication signal sender compiles the instructions to be transmitted into a free-space laser communication signal and sends it to all targets in a certain area. The communication signal receiver obtains information through low-cost photodetectors and interpretation circuits. When the communication signal sender is deployed on the ground, the communication signal receiver can be a group of drones. When the communication signal sender passes through a launch platform or irradiates the ground due to an altitude difference, the communication signal receiver can be a person. "Head-mounted" emphasizes that the setting of the photodetector has little effect on the normal actions of the communication signal receiver. Any free-space laser communication method that broadcasts and irradiates by a single user and receives on demand by multiple users is within the scope of the claims of the present invention.

[0038] The present invention provides an embodiment of a head-mounted optical broadcast communication method based on a homogenized light beam, including a communication signal sender and a receiver. The communication signal sender compiles the instructions to be transmitted onto a free-space laser communication carrier, amplifies the power through a power amplifier, expands the light spot aperture through optical beam expansion, and shapes the originally Gaussian distributed light spot into a uniform distribution through beam homogenization. After the power amplification, the optical aperture processes the beam expansion and light spot homogenization so that it can illuminate all targets within a certain range and the power at each location is basically consistent. Multiple communication signal receivers are equipped with external photodetectors. When the homogenized light beam irradiates the photodetector, the built-in signal interpretation circuit interprets the information according to the response of the photodetector and transmits the instructions to the signal receiver.

[0039] like Figure 1 As shown, the present invention provides an embodiment of a head-mounted optical broadcast communication method based on a homogenized light beam, comprising:

[0040] S101, broadcasting and sending of communication signals. The communication signal sender compiles the instructions to be transmitted into the free space laser communication carrier, amplifies the power through the power amplifier, expands the aperture of the light spot through optical beam expansion, and shapes the original Gaussian distribution of the light spot into a uniform distribution through beam homogenization;

[0041] S102, receiving communication signals, multiple target users have external photoelectric detectors. When the homogenized light beam is irradiated to the photoelectric detector (either directly or after multiple diffuse reflections), the built-in signal interpretation circuit will interpret the information according to the response of the photoelectric detector and pass the command to the target user (either a drone or a person).

[0042] In some embodiments, S102 when the homogenized light beam irradiates the photodetector includes direct irradiation or irradiation after multiple diffuse reflections.

[0043] In some embodiments, the plurality of communication signal recipients are persons wearing head-mounted photodetectors.

[0044] like Figure 2 As shown, this embodiment also provides a head-mounted optical broadcast communication method based on a homogenized light beam, which specifically includes:

[0045] 1. The communication signal sender compiles the instructions to be sent into the free space laser communication system, and the free space laser communication system outputs an intensity modulated or phase modulated laser communication signal;

[0046] 2. Amplify the power of the laser communication signal through a power amplifier;

[0047] 3. The output parallel light laser communication signal is expanded by an optical beam expansion system, and the lateral mode field distribution of the light spot is Gaussian;

[0048] 4. The output light field is optically shaped through an optical homogenization system to transform it from a Gaussian mode field distribution to a step mode field distribution, that is, the power at each point within the beam range is approximately the same and the power within the beam range decays rapidly to near zero.

[0049] 5. The communication signal sender uses the expanded free-space laser communication signal to illuminate a specific area, and multiple communication signal receivers in the area (such as people in the figure) wear photodetectors on their heads;

[0050] 6. After the free-space laser communication signal is irradiated to the photodetector, it causes a signal response. The signal interpretation circuit embedded in the photodetector converts it into text according to the signal response, and the communication signal receiver obtains the original instruction through human-computer interaction means (such as headset broadcasting voice). The free-space laser communication signal can directly irradiate the photodetector, or it can irradiate the photodetector after being diffusely reflected by an object.

[0051] like Figure 3 As shown, this embodiment shows an embodiment of a head-mounted optical broadcast communication method based on a homogenized light beam, comprising:

[0052] S201, the communication signal sender compiles the instruction to be sent into the free space laser communication system, and the free space laser communication system outputs an intensity modulated or phase modulated laser communication signal;

[0053] S202, amplifying the power of the laser communication signal by a power amplifier;

[0054] S203, performing spot expansion on the output parallel light laser communication signal through an optical beam expansion system, and the lateral mode field distribution of the spot is Gaussian;

[0055] S204, optically shaping the output light field through an optical homogenization system, so that the output light field is transformed from a Gaussian mode field distribution to a step mode field distribution, that is, the power at each point within the beam range is approximately the same, and the power within the beam range decays rapidly to near zero;

[0056] S205, the communication signal sender illuminates a specific area using the expanded free-space laser communication signal, and multiple communication signal receivers in the area wear photoelectric detectors on their heads;

[0057] S206. After the free-space laser communication signal is irradiated to the photodetector, it causes a signal response. The signal interpretation circuit embedded in the photodetector converts it into text according to the signal response, so that the communication signal receiver obtains the original instruction through human-computer interaction.

[0058] In some embodiments, S206 the free-space laser communication signal directly illuminates the photodetector or illuminates the photodetector after being diffusely reflected by an object.

[0059] In some embodiments, the sender of the communication signal compiles the instructions to be transmitted into the free space laser communication carrier, amplifies the power through a power amplifier, expands the aperture of the light spot through optical beam expansion, and shapes the originally Gaussian distributed light spot into a uniform distribution through beam homogenization.

[0060] In some embodiments, S206, when the homogenized light beam irradiates the photodetector, the built-in signal interpretation circuit will interpret the information according to the response of the photodetector and transmit the instruction to the communication signal receiver.

[0061] In some embodiments, the communication signal sender compiles the instructions to be transmitted into a free-space laser communication signal and sends it to all targets within a certain area, and the communication signal receiver obtains information through a low-cost photoelectric detector and a decoding circuit.

[0062] Compared with the prior art, the present invention has the following advantages:

[0063] (1) First, the present invention proposes a unidirectional broadcast all-optical communication method, which can meet some special application requirements, such as being affected by strong solar activity, interference in radio communication channels, and the need to broadcast landing instructions to a group of drones performing group performances;

[0064] (2) The method proposed by the present invention does not require a precise tracking and aiming system. The communication signal transmitting end can achieve communication signal coverage within a certain range through simple optical mode field conversion, and the communication signal receiving end only needs a highly sensitive photoelectric detector and a signal interpretation system to achieve signal reception;

[0065] (3) The method proposed in the present invention can also provide a transmission method for an initial session protocol for free-space laser communication, improve the ability of all-optical communication networks to quickly establish links, and provide important support for their promotion and application.

[0066] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0067] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0068] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0069] The present application may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0070] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0071] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0072] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0073] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0074] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0075] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0076] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0077] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A head-mounted optical broadcast communication method based on a homogenized light beam, comprising a communication signal sender and a receiver, Features: The sender of the communication signal compiles the instructions to be transmitted into the free-space laser communication carrier, amplifies the power through the power amplifier, expands the light spot aperture through optical beam expansion, and shapes the originally Gaussian-distributed light spot into a uniform distribution through beam homogenization. After power amplification, the optical aperture handles beam expansion and light spot homogenization so that it can illuminate all targets within a certain range and the power at each location remains basically consistent. Multiple communication signal receivers have external photodetectors. When the homogenized light beam hits the photodetector, the built-in signal interpretation circuit will interpret the information according to the response of the photodetector and pass the instructions to the signal receiver.

2. The head-mounted optical broadcast communication method based on homogenized light beam according to claim 1, Features The method specifically comprises the following steps: S101, broadcasting and sending of communication signals. The communication signal sender compiles the instructions to be transmitted into the free space laser communication carrier, amplifies the power through the power amplifier, expands the aperture of the light spot through optical beam expansion, and shapes the original Gaussian distribution of the light spot into a uniform distribution through beam homogenization; S102, receiving communication signals. Multiple communication signal receivers have external photodetectors. When the homogenized light beam irradiates the photodetectors, the built-in signal interpretation circuit interprets the information according to the response of the photodetectors and transmits the instructions to multiple communication signals.

3. The head-mounted optical broadcast communication method based on homogenized light beam according to claim 2, It is characterized in that In S102, when the homogenized light beam irradiates the photoelectric detector, it includes direct irradiation or irradiation after multiple diffuse reflections.

4. The head-mounted optical broadcast communication method based on homogenized light beam according to claim 2, It is characterized in that When the multiple communication signal receivers are persons, the receivers wear photoelectric detectors on their heads.

5. The head-mounted optical broadcast communication method based on homogenized light beam according to claim 1, Features The method specifically comprises: S201, the communication signal sender compiles the instruction to be sent into the free space laser communication system, and the free space laser communication system outputs an intensity modulated or phase modulated laser communication signal; S202, amplifying the power of the laser communication signal by a power amplifier; S203, performing spot expansion on the output parallel light laser communication signal through an optical beam expansion system, and the lateral mode field distribution of the spot is Gaussian; S204, optically shaping the output light field through an optical homogenization system, so that the output light field is transformed from a Gaussian mode field distribution to a step mode field distribution, that is, the power at each point within the beam range is approximately the same, and the power within the beam range decays rapidly to near zero; S205, the communication signal sender illuminates a specific area using the expanded free-space laser communication signal, and multiple communication signal receivers in the area wear photoelectric detectors on their heads; S206. After the free-space laser communication signal is irradiated to the photodetector, it causes a signal response. The signal interpretation circuit embedded in the photodetector converts it into text according to the signal response, so that the communication signal receiver obtains the original instruction through human-computer interaction.

6. The head-mounted optical broadcast communication method based on homogenized light beam according to claim 5, It is characterized in that The S206 free-space laser communication signal directly illuminates the photoelectric detector or illuminates the photoelectric detector after being diffusely reflected by an object.

7. The head-mounted optical broadcast communication method based on homogenized light beam according to claim 5, It is characterized in that The communication signal sender compiles the instructions to be transmitted into the free space laser communication carrier, amplifies the power through the power amplifier, expands the light spot aperture through optical beam expansion, and shapes the originally Gaussian distributed light spot into a uniform distribution through beam homogenization.

8. The head-mounted optical broadcast communication method based on homogenized light beam according to claim 5, It is characterized in that In S206, when the homogenized light beam irradiates the photodetector, the built-in signal interpretation circuit will interpret the information according to the response of the photodetector and transmit the instruction to the communication signal receiver.

9. The head-mounted optical broadcast communication method based on homogenized light beam according to claim 5, It is characterized in that The communication signal sender compiles the instructions to be transmitted into a free-space laser communication signal and sends it to all targets in a certain area. The communication signal receiver obtains information through a low-cost photoelectric detector and a decoding circuit.

10. A computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the method according to any one of claims 1 to 9.

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