Cloud-based information optical experiment system capable of realizing remote interaction

Abstract

The invention discloses a cloud-based information optical experiment system capable of realizing remote interaction, and relates to the technical field of remote experiments. The system adopts a three-stage architecture of an instrument end, a cloud end and a client end, wherein the instrument end comprises a light source, a multi-stage optical device, a camera, a two-dimensional displacement console and a microcomputer which are arranged along a light path, and is used for executing an information optical experiment and collecting data; the cloud serves as a relay and is responsible for bidirectional forwarding and session management of experimental data and control instructions; and the client provides a remote interaction interface for a user. A user adjusts experimental parameters through the client, controls the displacement and state of the optical device, and issues an instruction to the instrument end for execution through the cloud; experimental images collected by the camera are coded and then distributed to the client side through the cloud side, and low-delay video feedback is achieved. The system is suitable for remotely carrying out information optical experiments such as spatial filtering, Fourier transform and scalar diffraction, effectively overcomes the limitation of a traditional information optical experiment on a site and time, realizes remote, interactive and resource sharing of a real optical experiment, and can remarkably improve the equipment utilization rate and the teaching and scientific research efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of optical experimental teaching and remote experimental systems, and specifically relates to a cloud-based information optical experimental system with remote interaction capability. Background Technology

[0002] Information optics is a core course in the field of optoelectronic information, and its experimental teaching plays a crucial role in deepening students' understanding of theories such as optical Fourier transform, spatial filtering, and interference diffraction. However, traditional information optics experimental teaching faces many limitations: the experimental equipment is sophisticated and expensive, laboratory space is limited, and the time window for students to operate is short, resulting in insufficient hands-on opportunities for each student and restricting personalized exploration. In addition, teaching resources are scattered across various laboratories, making it difficult to achieve shared utilization, and the cost of redundant construction and maintenance of equipment is high. To alleviate the shortage of experimental resources, many universities have tried to introduce virtual simulation experimental teaching. Although virtual simulation experimental platforms allow students to experience 3D experimental environments through computers, their virtual reality nature means that students lack the process of interacting with real optical devices. The experimental phenomena and data are calculation results under ideal models, lacking realism and failing to allow students to truly experience the impact of various experimental errors and interferences on the experimental results.

[0003] In recent years, the development of technologies such as the Internet of Things (IoT) and remote control has made it possible to conduct information optics experimental teaching by remotely controlling real experimental optical paths through the cloud. By deploying an experimental platform using a cloud architecture, students can remotely access experimental equipment anytime, anywhere via the internet, breaking through the time and space limitations of traditional experimental teaching and achieving "spatiotemporal decoupling" in experimental teaching. The cloud-based experimental system can centrally manage experimental devices, enabling multiple users to use them on demand, effectively alleviating the problems of insufficient equipment and limited space, and significantly reducing the operation and maintenance costs and redundant equipment investment in experimental teaching. At the same time, the remote experimental platform can also record students' experimental process data, facilitating teachers to monitor the experimental process, evaluate results, and analyze learning behavior, thus promoting the informatization and intelligentization of experimental teaching.

[0004] Therefore, in order to improve the efficiency and quality of information optics experimental teaching, it is urgent to develop a remote experimental system that combines real information optics experimental devices with cloud network technology. Summary of the Invention

[0005] The purpose of this invention is to provide a cloud-based, remotely interactive information optics experimental system to solve the problems of traditional information experimental teaching being limited by time and space and having low equipment utilization.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A cloud-based, remotely interactive information optics experimental system adopts a layered, modular design, comprising three levels: client, cloud, and instrument. The client accesses the remote experimental interface via a browser, providing users with an interactive entry point; the cloud is responsible for connection management, command relay, and video stream distribution; the instrument acts as the execution and feedback layer, translating commands from the cloud into actual operations on optical components and precision motion control mechanisms, and collecting and uploading experimental data.

[0008] The instrument unit is the experimental execution unit of this invention, and its core includes a microcomputer, a light source, various optical devices, a camera, and a two-dimensional displacement console. Preferably, the optical devices include lenses and programmable spatial light modulators, forming a typical information optical path such as a 4f system. The two-dimensional displacement console is used to precisely adjust the spatial position of the optical devices. Each console is typically equipped with a microcontroller and communicates with the host microcomputer via a serial bus. The microcomputer runs the control program, responsible for video acquisition and encoding, instruction parsing, status monitoring, and communication with the cloud.

[0009] The cloud-based system deploys a real-time streaming media service and a backend control service. The streaming media service receives video streams pushed by the instrument and distributes them to the client; the backend control service processes the client's operation commands and forwards them to the instrument, while also managing experimental sessions, permissions, and experimental data storage.

[0010] The client is a regular computer or mobile terminal, providing parameter settings, status display, and video preview functions through a web interface. User operations are transmitted to the cloud in real time via persistent connection technologies such as WebSocket.

[0011] Compared with existing information optics experimental systems, the present invention has the following significant advantages:

[0012] (1) Users are not limited by specific laboratory sites and time arrangements, and can remotely operate real optical experimental equipment through the network, which greatly improves the flexibility and accessibility of experimental teaching.

[0013] (2) Multiple users can share the same set of experimental equipment and use it at different times, which avoids redundant construction, effectively reduces the investment and maintenance costs of instruments, and improves the utilization rate of equipment.

[0014] (3) By combining cloud interaction with real experimental optical paths, the data and phenomena obtained by students are derived from real physical processes, which enhances the authenticity and effectiveness of teaching and can stimulate learning interest more than pure virtual simulation.

[0015] (4) Teachers can monitor students’ experimental operations and results through the platform, obtain complete process data for evaluation and guidance, which helps to improve teaching quality.

[0016] (5) The system has cross-institutional sharing capabilities, which can open up the experimental resources of one institution to other institutions for use, thereby promoting the optimal allocation of resources. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall system architecture of the present invention.

[0018] Figure 2 This is a schematic diagram of the system module design of the present invention.

[0019] Figure 3 This is a schematic diagram of the optical path for the spatial filtering experiment corresponding to Example 1.

[0020] Figure 4 This is a schematic diagram of the optical path for the spatial Fourier transform experiment corresponding to Example 2.

[0021] Figure 5 This is a schematic diagram of the optical path for the scalar diffraction experiment corresponding to Example 3. Detailed Implementation

[0022] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] This invention proposes a cloud-based, remotely interactive information optics experimental system, the overall architecture of which is as follows: Figure 1 As shown, the system includes an instrument (A), a cloud (B), and a client (C). The instrument (A) comprises a light source (A1), an optical component (A2), a camera (A3), a two-dimensional displacement control console (A4), and a microcomputer (A5). The camera (A3) is used to acquire optical experimental images of light after it passes through the optical component (A2). The two-dimensional displacement control console (A4) is used to precisely adjust the spatial position of the optical component (A2). The microcomputer (A5) is connected to the camera (A3) and the two-dimensional displacement control console (A4), responsible for uploading images and status data to the cloud (B) and executing control commands from the cloud (B). The cloud (B) communicates bidirectionally with the client (C), distributing experimental videos to the client (C) and forwarding the client's (C) operation commands to the instrument (A).

[0024] Figure 2 The modular design of this system is demonstrated. Correspondingly, the system includes instrument-side module 1, cloud-side module 2, and client-side module 3.

[0025] Client module 3 loads the front-end interface through web resource loading module 3-3; establishes a real-time session with cloud back-end processing module 2-2 through control command and status module 3-2, sends commands and receives status; and receives and displays video streams through experimental operation and display module 3-1.

[0026] The cloud module 2 includes a streaming media distribution module 2-1, a backend processing module 2-2, and a frontend resource module 2-3, which are responsible for video stream forwarding, instruction and status relay, and static resource provision, respectively.

[0027] The instrument module 1 includes an optical experiment debugging module 1-1, a displacement motion control module 1-2, and a data information processing module 1-3. The optical experiment debugging module 1-1 is used to control the status and parameters of the light source and optical devices in the optical path of the information optics experiment; the displacement motion control module 1-2 is used to achieve precise displacement control; and the data information processing module 1-3 is used for image encoding and data reporting. A microcomputer (A5) serves as the control platform, carrying and running the software instances of the above modules.

[0028] In a preferred embodiment of the present invention, the optical device (A2) may specifically include:

[0029] Spatial light modulators (A2-1, A2-3): These are programmable masks located on the object plane and the spectral plane, respectively.

[0030] Lenses (A2-2, A2-4): form a 4f system, used to realize Fourier transform and inverse transform.

[0031] The camera (A3) is located on the image plane and is used to capture the final light field.

[0032] The two-dimensional displacement control console (A4) consists of various two-dimensional control units (A4-1 to A4-4), which provide the corresponding optical devices with displacement fine-tuning capabilities in the X (along the optical path) and Y (perpendicular to the optical path) directions.

[0033] Example 1: Cloud Space Filtering Experiment

[0034] This embodiment is based on the 4f spatial filtering principle, and the optical path diagram is as follows: Figure 3 As shown.

[0035] At the instrument end (A), the displacement motion control module 1-2 precisely positions the object plane spatial light modulator (A2-1) and the spectral plane spatial light modulator (A2-3) via the two-dimensional displacement control console (A4), and fixes the lenses (A2-2, A2-4) according to the 4f system geometry. The optical experiment debugging module 1-1 sets the parameters of the light source (A1), loads the object pattern on the spatial light modulator (A2-1), and loads the filter pattern (such as high-pass, low-pass, and band-pass) on the spatial light modulator (A2-3).

[0036] According to the 4f spatial filtering principle, the object pattern loaded on the spatial light modulator (A2-1) is illuminated by the light source (A1) to form object light. After passing through the lens (A2-2), the object light can obtain the spectrum of the object pattern on the spectral plane. This spectrum is filtered by the filtering pattern loaded on the spatial light modulator (A2-3) to obtain the filtered spectrum. The filtered spectrum is then passed through the lens (A2-4) to complete the inverse Fourier transform, and the filtered image is obtained on the image plane. The filtered image can be acquired by the camera (A3).

[0037] Data processing modules 1-3 encode the filtered images captured by the camera (A3) and stream them to the cloud (B).

[0038] On the client (C), the user selects object patterns and filter patterns through the interface and adjusts the position of optical components. These instructions are forwarded to the instrument (A) via the cloud (B) for execution. The user can observe the filtered video stream transmitted back by the camera (A3) in real time.

[0039] Example 2: Cloud Space Fourier Transform Experiment

[0040] This embodiment is based on the Fourier transform property of the lens, and the optical path diagram is as follows. Figure 4 As shown.

[0041] At the instrument end (A), the displacement motion control module 1-2 controls the positions of the spatial light modulator (A2-3) and the lens (A2-4), positioning (A2-3) at the front focal plane of the lens (A2-4) and the camera (A3) at the rear focal plane. The optical experiment debugging module 1-1 loads the object pattern to be transformed onto the spatial light modulator (A2-3). The data information processing module 1-3 streams the Fourier spectrum image acquired by the camera (A3) to the cloud (B).

[0042] On the client (C), the user can change the object pattern and fine-tune the optical path to observe the changes in its Fourier spectrum in real time.

[0043] Example 3: Cloud-based scalar diffraction experiment

[0044] This embodiment is based on Fresnel or Fraunhofer diffraction theory, and the optical path diagram is shown below. Figure 5 As shown.

[0045] At the instrument end (A), diffraction patterns, such as single-aperture, double-aperture, single-slit, and double-slit patterns, are loaded onto the spatial light modulator (A2-3). Under illumination from the light source (A1), optical diffraction phenomena occur, and the diffraction image can be acquired by the camera (A3). The instrument end (A) controls the relative distance between the spatial light modulator (A2-3) and the camera (A3) via the displacement motion control module 1-2. The optical experiment debugging module 1-1 loads the diffraction pattern onto the spatial light modulator (A2-3). The data processing module 1-3 streams the diffraction pattern acquired by the camera (A3) to the cloud (B).

[0046] On the client (C), users can select different diffraction elements and observation distances to study the changing patterns of diffraction patterns in real time.

[0047] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the principles and spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cloud-based, remotely interactive information optics experimental system, characterized in that, include: Instrument terminal (A), cloud terminal (B), and client terminal (C); The instrument (A) includes a microcomputer (A5) and a light source (A1), a multi-level optical device (A2), and a camera (A3) arranged sequentially along the optical path. The optical device (A2) is mounted on a two-dimensional displacement console (A4) for precise control of its spatial position, thereby realizing information optics experiments such as spatial filtering, Fourier transform, and scalar diffraction. The camera (A3) is used to acquire images of the results of the information optics experiments. The microcomputer (A5) is connected to the camera (A3) and the two-dimensional displacement console (A4) for encoding the images acquired by the camera (A3) and uploading them to the cloud (B), and for executing control commands from the cloud (B) to drive the two-dimensional displacement console (A4) and control the light source (A1). The cloud (B) is used to receive and forward video and status data from the instrument (A) to the client (C), and to forward operation instructions from the client (C) to the instrument (A). The client (C) provides users with a remote interactive interface for setting experimental parameters, monitoring equipment status, and previewing real-time experimental videos. The experimental system can perform the following experimental steps: The client (C) initiates an experimental session to the cloud (B); The cloud (B) allocates session resources and establishes a control channel with the instrument's microcomputer (A5); The microcomputer (A5) receives control instructions from the cloud (B), drives the two-dimensional displacement console (A4) to position the optical device (A2) to the target coordinates, and controls the operating parameters of the light source (A1); The camera (A3) captures experimental images after light passes through the optical device (A2); The microcomputer (A5) encodes the experimental images and uploads them, along with the device status data, to the cloud (B). The cloud (B) distributes the received video stream and status data to the client (C); The client (C) performs further operations or parameter adjustments based on the video stream and status data until the experiment ends.

2. The system according to claim 1, characterized in that: The optical device (A2) is a collection of multiple optical device units connected in series, and the optical device unit includes one or more of a lens, aperture, spatial filter or programmable spatial light modulator.

3. The system according to claim 1, characterized in that: The two-dimensional displacement console (A4) includes at least one two-dimensional control unit, which includes an X-axis linear actuator along the optical path and a Y-axis linear actuator perpendicular to the optical path. The actuators are driven by a stepper motor or a servo motor. The two-dimensional displacement console (A4) is equipped with a position sensor for feeding back the real-time coordinates of the optical device (A2).

4. The system according to claim 3, characterized in that: The microcomputer (A5) and the two-dimensional displacement control console (A4) exchange commands and position data via a serial bus, which is one of RS232, RS485 or CAN bus.

5. The system according to claim 1, characterized in that: The image data output by the camera (A3) is encoded and packaged in real time by the microcomputer (A5) and uploaded to the cloud (B) via a streaming media protocol; the client (C) receives and plays the video stream through a browser.

6. The system according to claim 1, characterized in that: The cloud (B) includes: A streaming media distribution module is used to receive real-time video streams from a microcomputer (A5) and distribute them to the client (C). The backend processing module is used to establish and maintain sessions with the microcomputer (A5) and the client (C), receive, forward and convert control commands, and cache and record experimental status. The front-end resource module is used to provide the client (C) with the static resources required for the web page interface and to work with the back-end processing module to complete the interaction.

7. The system according to claim 1, characterized in that: The client (C) provides an operation interface including a parameter setting area, a status display area, and a video preview area; device positioning commands, light source control commands, or pattern sending commands issued by the user through the operation interface are forwarded to the microcomputer (A5) for execution via the cloud (B).

8. The system according to claim 2, characterized in that: When the optical device (A2) includes a programmable spatial light modulator, the microcomputer (A5) is further configured to receive filter or pattern data from the client (C) and send it to the programmable spatial light modulator to update its display state.

9. The system according to claim 1, characterized in that: The microcomputer (A5) is also used to monitor the status of the two-dimensional displacement control console (A4). When a limit switch, overcurrent, or abnormal position is detected, alarm information is pushed to the cloud (B) and the client (C) and an emergency stop operation is performed.

10. The system according to claim 1, characterized in that: The on / off state and power of the light source (A1) are controlled by a microcomputer (A5), and the status data of the light source (A1) and the video frame timestamp are synchronously uploaded to the cloud (B) for display and recording by the client (C).

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