Rainbow pattern detection device

Abstract

The utility model provides a rainbow pattern detection device. The rainbow pattern detection device comprises a light source, a semicircular guide rail, a circular guide rail, a waveguide supporting seat, an image acquisition device and a control system, the image acquisition device is electrically connected with the control system; the light source is movably arranged on the semicircular guide rail; two ends of the semicircular guide rail are movably arranged on the circular guide rail; the waveguide supporting seat is used for bearing a waveguide sheet. The control system controls the light source and the semicircular guide rail to slide and further controls the image acquisition device to acquire rainbow images. According to the utility model, accurate and comprehensive detection of the rainbow pattern on the waveguide sheet is realized, the equipment cost is reduced, the detection efficiency is improved, and the reliability and repeatability of a test result are ensured through accurate control.

Description

Technical Field

[0001] This utility model relates to the field of optical detection technology, and more specifically, to a rainbow pattern detection device. Background Technology

[0002] Diffractive waveguides, as one of the core implementation methods of Augmented Reality (AR) technology, have attracted widespread attention. This technology achieves the function of guiding light waves by finely etching micro- and nano-scale grating structures within the material, effectively transmitting light from the light source from the coupling region to the coupling region, and ultimately guiding it to the human eye. However, light of different wavelengths diffracts into new beams of light in different directions and angles after passing through the grating structure, resulting in rainbow patterns. The presence of rainbow patterns not only causes visual stimulation to the human eye but also severely reduces the imaging quality of the waveguide, affecting the clarity and comfort of the AR experience. Therefore, solving the rainbow pattern problem is of great significance for improving the performance of diffractive waveguides and optimizing the AR visual experience.

[0003] Rainbow patterns originate from the diffraction of ambient light by a grating. Therefore, adjusting the grating parameters can effectively mitigate the effect of rainbow patterns. Thus, the primary task is to accurately detect the rainbow effect on waveguide sheets. Current rainbow detection devices suffer from operational complexity and high costs; therefore, simplifying the detection process and reducing equipment costs are technical problems that need to be addressed. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a rainbow pattern detection device to simplify the rainbow pattern detection process and reduce equipment costs.

[0005] In a first aspect, this utility model provides a rainbow pattern detection device, comprising: a light source, a semi-circular guide rail, a circular guide rail, a waveguide support, an image acquisition device, and a control system; the image acquisition device is electrically connected to the control system; the light source is movably mounted on the semi-circular guide rail; both ends of the semi-circular guide rail are movably mounted on the circular guide rail; the waveguide support is used to support a waveguide sheet; the control system is used to control the sliding of the light source and the semi-circular guide rail, and also to control the image acquisition device to acquire rainbow pattern images.

[0006] In an optional embodiment, the light source is slidably connected to the semicircular guide rail via a first sliding element; both ends of the semicircular guide rail are slidably connected to the circular guide rail via second sliding elements; the control system is used to control the first sliding element to drive the light source to slide, and to control the second sliding element to drive the semicircular guide rail to slide.

[0007] In an alternative implementation, the sliding element is any of the following: an electric pulley; a non-electric pulley; or a slider.

[0008] In an optional implementation, when the sliding element is the electric pulley, the control system is electrically connected to the built-in motor of the electric pulley.

[0009] In an optional embodiment, when the sliding element is a non-electric pulley or slider, the semi-circular guide rail is further provided with a first transmission device and a first motor; the circular guide rail is further provided with a second transmission device and a second motor; the first transmission device is connected to the first sliding element and the first motor respectively; the second drive device is connected to the second sliding element and the second motor respectively; the first motor and the second motor are both electrically connected to the control system.

[0010] In an optional embodiment, the semicircular guide rail is provided with a support structure, and the light source is mounted on the support structure; the support structure is connected to the first sliding element.

[0011] In an optional embodiment, the incident angle of the light source relative to the waveguide plate is adjusted when the light source slides on the semicircular guide rail; the azimuth angle of the light source relative to the waveguide plate is adjusted when the semicircular guide rail slides on the circular guide rail.

[0012] In an optional implementation, the semicircular guide rail is a rigid guide rail.

[0013] In an optional embodiment, the control system is specifically configured to control the semicircular guide rail to traverse each azimuth angle within the azimuth angle adjustment range according to a preset azimuth angle scanning step size. For each azimuth angle traversed, the control system controls the light source to traverse each incident angle within the incident angle adjustment range according to a preset incident angle scanning step size. The control system is also specifically configured to control the image acquisition device to perform image acquisition for each incident angle traversed.

[0014] In an optional implementation, the control system further includes an interactive interface; the interactive interface is used to receive start or stop commands and to respond to input operations to obtain the incident angle scan step size and the azimuth angle scan step size.

[0015] The rainbow pattern detection device provided by this utility model firstly uses a waveguide support base to not only support the waveguide sheet, but also movably mounts a light source on a semi-circular guide rail. The two ends of the semi-circular guide rail are movably mounted on a circular guide rail. This allows for full-range adjustment of the azimuth angle of the light source relative to the waveguide sheet and the incident angle of the light illuminating the waveguide sheet during sliding, thereby obtaining images at different incident angles. The control system can then perform rainbow pattern detection and analysis based on these images and evaluate the quality of the waveguide sheet based on the analysis results. In summary, the rainbow pattern detection device can achieve accurate and comprehensive detection of rainbow patterns on waveguide sheets, reduce equipment costs, improve detection efficiency, and ensure the reliability and repeatability of test results through precise control.

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the rainbow pattern detection device provided in the embodiment of this utility model;

[0019] Figure 2 A schematic diagram showing the light source sliding on the semi-circular guide rail in an embodiment of this utility model is shown;

[0020] Figure 3 A schematic diagram illustrating the change in the incident angle of the light source illuminating the waveguide sheet in an embodiment of this utility model is shown.

[0021] Figure 4 A schematic diagram showing a semi-circular guide rail sliding on a circular guide rail, provided in an embodiment of this utility model;

[0022] Figure 5 A schematic diagram illustrating the azimuth angle variation of the light source relative to the waveguide sheet, provided for an embodiment of this utility model;

[0023] Figure 6 A partial structural schematic diagram of the rainbow pattern detection device provided in this embodiment of the utility model;

[0024] Figure 7 Another structural schematic diagram of the rainbow pattern detection device provided in this embodiment of the utility model;

[0025] Figure 8 A schematic diagram of another partial structure of the rainbow pattern detection device provided in an embodiment of this utility model;

[0026] Figure 9 This is a schematic diagram of the structure of the semicircular guide rail provided in an embodiment of the present utility model;

[0027] Figure 10 Functional block diagram of the control system provided in the embodiments of this utility model;

[0028] Figure 11 A schematic diagram of a rainbow pattern image acquired by the rainbow pattern detection device provided in this embodiment of the utility model;

[0029] Figure 12 For the purposes of this utility model embodiment Figure 11 A schematic diagram illustrating the effect of rainbow pattern recognition on a rainbow pattern image.

[0030] Icons: Rainbow pattern detection device-10; Light source-110; Semicircular guide rail-120; Circular guide rail-130; Waveguide support base-140; Image acquisition device-150; Control system-160; Waveguide sheet-170; First sliding element-1201; Second sliding element-1301; Support structure-1202; Control module-1601; Storage module-1602; Image processing module-1603; Motor drive module-1604. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] In the description of this utility model, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Considering that existing rainbow pattern detection devices are complex in structure, high in design cost, and cumbersome in operation, this utility model provides a rainbow pattern detection device, such as... Figure 1 As shown, Figure 1 This is a schematic diagram of the rainbow pattern detection device provided in an embodiment of the present invention. It should be noted that... Figure 1 The connection between the control system 160 and the semicircular guide rail 120 and the circular guide rail 130 is omitted. This will be shown later when the sliding principle of the light source 110 and the semicircular guide rail 120 is introduced.

[0035] exist Figure 1 The rainbow pattern detection device 10 includes: a light source 110, a semi-circular guide rail 120, a circular guide rail 130, a waveguide support 140, an image acquisition device 150, and a control system 160; the image acquisition device 150 is electrically connected to the control system 160; the light source 110 is movably mounted on the semi-circular guide rail 120; both ends of the semi-circular guide rail 120 are movably mounted on the circular guide rail 130; the waveguide support 140 is used to support the waveguide sheet 170; the control system is used to control the sliding of the light source and the semi-circular guide rail, and also to control the image acquisition device 150 to acquire rainbow pattern images.

[0036] The rainbow pattern detection device 10 provided in this embodiment of the invention has the following advantages: First, the waveguide sheet 170 is stably supported by the waveguide support 140. The light source 110 is movably mounted on the semicircular guide rail 120, and both ends of the semicircular guide rail 120 are also movably mounted on the circular guide rail 130. Through the precise control of the control system 160, the light source 110 and the semicircular guide rail 120 can finely adjust the azimuth angle of the light source relative to the waveguide sheet 170 and the incident angle of the light entering the waveguide sheet 170 during the sliding process, thereby obtaining images under different incident angles. The control system 160 can perform rainbow pattern detection and analysis based on these images, and evaluate the quality of the waveguide sheet 170 based on the analysis results. In summary, the rainbow pattern detection device 10 can achieve accurate and comprehensive detection of rainbow patterns on the waveguide sheet 170, reduce equipment costs, improve detection efficiency, and ensure the reliability and repeatability of test results through precise control.

[0037] Next, this utility model embodiment will clearly introduce the above-mentioned components in conjunction with the relevant drawings, and elaborate in detail the function of each component in the rainbow pattern measurement process.

[0038] exist Figure 1 In this context, the light source 110 can be selected from various sources, including but not limited to light-emitting diodes, lamps, or light bulbs, etc., which are not limited here.

[0039] The light source 110 is movably mounted on the semi-circular guide rail 120 and can slide along the trajectory of the semi-circular guide rail 120. During the sliding process, scanning light is incident on the waveguide plate 170 at various angles to ensure that rainbow pattern images can be acquired. In this embodiment of the invention, the angle of incidence of light on the waveguide plate 170 refers to the angle formed by the light and the normal to the incident surface of the waveguide plate 170, and its range covers from 0 degrees to 90 degrees to achieve precise scanning at different incident angles.

[0040] To understand this process more intuitively, please refer to [link / reference]. Figure 2 and Figure 3 , Figure 2 A schematic diagram showing the light source sliding on the semi-circular guide rail in an embodiment of this utility model is shown; Figure 3 This illustrates the change in the incident angle of light incident on waveguide 170. Figure 2 In the middle, the light source 110 slides from position 1 to position 2 in a counterclockwise direction, and correspondingly, in Figure 3 In the process, the incident angle of light illuminating the waveguide plate 170 changes from θ1 to θ2.

[0041] This invention, through the above-described embodiments, achieves scanning of various incident angles when light shines on the waveguide sheet, ensuring that a clear rainbow effect is generated on the waveguide sheet. This comprehensive scanning mechanism effectively avoids the problem of not being able to observe the rainbow phenomenon due to improper selection of the incident angle. By ensuring that light is incident in the full range from 0 degrees to 90 degrees, it provides a reliable data foundation for subsequent rainbow analysis and evaluation.

[0042] It should be noted that this embodiment of the invention takes into account the characteristics of the waveguide sheet, namely that the waveguide can display different effects under different incident angles of light. At some incident angles, rainbow patterns can be observed, while at others, the rainbow patterns are not obvious or not observed at all. The purpose of scanning the incident angle in this embodiment of the invention is to find the incident angle from which rainbow patterns can be observed. However, if the distance changes during this process, it is difficult to distinguish whether the change in distance or the change in the incident angle affects the observation results. Therefore, this embodiment of the invention chooses to use distance as a fixed parameter so that experimental conditions can be controlled when scanning the incident angle. Therefore, the semicircular guide rail is a rigid guide rail, which ensures that the distance between the light source and the waveguide sheet remains constant during the movement of the light source and the semicircular guide rail.

[0043] Similarly, the two ends of the semicircular guide rail 120 can also be movably mounted on the circular guide rail 130, allowing the semicircular guide rail 120 to slide along the trajectory of the circular guide rail 130. When the semicircular guide rail 120 slides on the circular guide rail 130, the azimuth angle of the light source 110 relative to the waveguide plate 170 can be adjusted. For the waveguide plate 170, the azimuth angle refers to the angle between the projection vector formed by the projection point of the light source 110 on the plane of the waveguide plate and the center of the waveguide plate, and the X-axis of the plane of the waveguide plate.

[0044] To better understand the sliding process of the semicircular guide rail 120, please refer to [link / reference needed]. Figure 4 and Figure 5 . Figure 4 A schematic diagram showing the sliding of the semi-circular guide rail on the circular guide rail in an embodiment of this utility model is shown;

[0045] Figure 5 This illustrates a schematic diagram showing the change in the azimuth angle of the light source relative to the waveguide plate. Figure 4 In the middle, both ends of the semicircular guide rail 120 slide counterclockwise from position 3 to position 4, correspondingly, in Figure 5 In the middle, the azimuth angle of the light source 110 relative to the waveguide plate 170 is from Change to

[0046] In this embodiment of the invention, the azimuth angle adjustment range is from -180 degrees to +180 degrees.

[0047] Through the above implementation method, the light source can fully traverse and scan the azimuth angle range from -180 degrees to +180 degrees, thereby simulating the rainbow effect produced when the light source illuminates the waveguide sheet at different angles of incidence under different azimuths. This provides a data foundation for the accurate detection and analysis of rainbow patterns.

[0048] It should be pointed out that, in Figure 2 and Figure 4The counter-clockwise sliding direction is shown in the diagram, but this is merely an example and not a limitation on the sliding direction of the light source 110 and the semi-circular guide rail 120. Users can flexibly set the sliding direction of the light source 110 and the semi-circular guide rail 120 according to actual needs. This utility model does not make specific limitations in this regard. This design gives the system greater flexibility and adaptability to meet the requirements of different testing environments and conditions.

[0049] Furthermore, combined with Figure 2 and Figure 4 To enable the light source 110 and the semi-circular guide rail 120 to slide on their respective rails, this embodiment of the invention incorporates sliding elements on the semi-circular guide rail 120 and the circular guide rail 130. These sliding elements ensure the accuracy and stability of the light source 110 and the semi-circular guide rail 120 during the sliding process. For a more intuitive understanding of this structure, please refer to [link to relevant documentation]. Figure 6 , Figure 6 This is a partial structural schematic diagram of the rainbow pattern detection device provided in an embodiment of the present invention. It should be understood that... Figure 6 The first sliding element 1201 and the second sliding element 1301 are circular, but should not be construed as the only limitation on the shape of the sliding elements in the embodiments of this utility model.

[0050] exist Figure 6 In the process, the light source 110 can be slidably connected to the semi-circular guide rail 120 via the first sliding element 1201; both ends of the semi-circular guide rail 120 can be slidably connected to the circular guide rail 130 via the second sliding element 1301; the control system 160 is used to control the first sliding element 1201 to drive the light source 110 to slide, and to control the second sliding element 1301 to drive the semi-circular guide rail 120 to slide.

[0051] In optional embodiments, the sliding element in this utility model may be, but is not limited to, any of the following: an electric pulley; a non-electric pulley; or a slider.

[0052] It is worth noting that in the embodiments of this utility model, the first sliding element 1201 and the second sliding element 1301 can be the same or different according to specific application requirements. For example, as an example, the first sliding element 1201 can be designed as an electric pulley, while the second sliding element 1301 can be a non-electric pulley; or, both sliding elements 1201 and 1301 can be electric pulleys. Users can flexibly select and configure these sliding elements according to actual design requirements and operating environment.

[0053] Next, this utility model embodiment will use the first sliding element 1201 and the second sliding element 1301 as examples to introduce the application of the sliding element in this utility model. For the sake of simplicity, this utility model embodiment will refer to the first sliding element 1201 and the second sliding element 1301 as "sliding element" in the following content, and the semicircular guide rail 120 and the circular guide rail 130 as "guide rail". This simplification is merely for the purpose of making the language more concise and clear, and is not intended to limit the scope of this utility model embodiment.

[0054] In one embodiment, the sliding element can be an electric pulley, which can be securely mounted on the guide rail in various ways, such as using bolts, clamps, or dedicated mounting brackets. Regardless of the mounting method used, it is necessary to ensure that the electric pulley is stable on the guide rail and can roll freely.

[0055] The electric pulley is equipped with a motor, which can be connected to the pulley through a transmission mechanism such as gears or belts. This effectively converts the motor's rotational motion into the pulley's rotation, thereby driving the pulley to move along the guide rail.

[0056] In an optional implementation, the motor built into the electric pulley can be a stepper motor or a servo motor, etc., to achieve fine adjustment of the pulley's sliding.

[0057] The control system 160 is electrically connected to the motor built into the electric pulley. This electrical connection may include a power supply line and a control signal line. The power supply line is responsible for supplying electrical energy to the electric pulley, ensuring that its internal motor receives the necessary power to drive the pulley smoothly. At the same time, the control signal line (which may be a wired or wireless connection) is used to transmit specific operating commands to the electric pulley, including starting, stopping, adjusting speed, and changing direction, thereby achieving efficient and precise control of the electric pulley.

[0058] Based on the electric pulley implementation method, the rainbow pattern detection device provided in this embodiment of the invention can also be used as follows: Figure 7 As shown, Figure 7 This is another structural schematic diagram of the rainbow pattern detection device provided in this embodiment of the utility model. Precise control of the light source 110 and the semi-circular guide rail 120 can be achieved through an electric pulley, reducing or eliminating the need for manual operation of the pulley and improving efficiency and safety.

[0059] Besides employing an electric pulley configuration, embodiments of this invention also provide another implementation method, where the sliding element can also be a non-electric pulley or a slider. In this case, embodiments of this invention also require corresponding transmission devices and motors to be configured on the semi-circular guide rail 120 and the circular guide rail 130 to drive the sliding element to slide along the guide rails. For a more intuitive understanding of this structure, please refer to... Figure 8 , Figure 8 This is a partial structural schematic diagram of the rainbow pattern detection device provided in an embodiment of the present invention.

[0060] exist Figure 8 In this design, a transmission device and a motor are installed in the guide rail. The sliding element is connected to the transmission device, allowing it to roll smoothly along the guide rail under the drive of the transmission device. The transmission device is further connected to the motor, and the control system 160 is connected to the motor via an electrical connection to achieve precise control of the motor's start, stop, speed, and direction.

[0061] In optional embodiments, the transmission device can be directly mounted on the guide rail, mounted on the side of the guide rail, or integrated into the interior or bottom of the sliding element, making the sliding element itself a self-contained motion unit. The specific installation method depends on actual design requirements, space constraints, etc., and this embodiment of the present invention does not limit it in this regard.

[0062] In an optional implementation, the transmission device may be, but is not limited to, a belt, chain, or lead screw, used to convert the rotational motion of the motor into the motion of the slider. The motor may be, but is not limited to, a stepper motor, a servo motor, etc.

[0063] In this embodiment of the invention, regardless of the implementation method of the sliding element, in order to ensure the stability of the light source 110 during the sliding process, therefore, Figure 6 Based on this, please refer to Figure 9 , Figure 9 This is a schematic diagram of the structure of the semicircular guide rail provided in an embodiment of the present invention.

[0064] exist Figure 9 In the first sliding element 1201, an additional support structure 1202 is provided. The support structure 1202 is connected to the first sliding element 1201, and the light source 110 is mounted on the support structure 1202. This means that when the first sliding element 1201 moves along the guide rail, the light source 110 can remain stable and avoid tilting or falling off, which would affect the incident angle of the light source 110 illuminating the waveguide plate 170.

[0065] It should be understood that, Figure 9 The support structure 1202 is represented by a clamp, but this is not the only limitation on the support structure 1202. Users can flexibly adjust and set the support structure 1202 according to their specific needs. For example, as a possible implementation, the support structure 1202 can also be designed as a magnetic element, and this embodiment of the present invention does not limit this.

[0066] To ensure the stability of the semicircular guide rail 120 when sliding along the guide rail, in this embodiment of the invention, the circular guide rail 130 can be fixed on the waveguide support 140. The waveguide support 140 is not only used to support the waveguide sheet 170, but also to support the circular guide rail 130 and the semicircular guide rail 120 and the light source 110 on it, forming a robust support structure.

[0067] In this embodiment of the invention, the waveguide support 140 can be composed of a base and a bracket. The upper end of the bracket can be designed with a structure for fixing the waveguide sheet 170, such as a clamp, to ensure the stability of the waveguide sheet 170 during operation and prevent it from accidentally falling off.

[0068] The height of the bracket is adjustable, either manually or electrically, so that the waveguide plate 170 can be precisely positioned at the center of the circular guide rail 130.

[0069] Based on the above structure, the control system 160 can control the image acquisition device 150 to acquire images. Optionally, the image acquisition device 150 can acquire images of the waveguide sheet 170 from any angle. In a preferred embodiment, the image acquisition device 150 and the waveguide sheet 170 can be on the same horizontal plane, i.e., the image acquisition device 150 and the waveguide sheet 170 are center-aligned to ensure a clear and complete rainbow pattern image is acquired. Furthermore, the distance between the image acquisition device 150 and the waveguide sheet 170 can be flexibly set according to the implementation scenario conditions to ensure that a complete and clear rainbow pattern image can be captured.

[0070] It should be noted that, in this embodiment of the invention, to ensure a clean background for the captured rainbow pattern image and reduce interference with the rainbow pattern recognition process, the entire shooting process should be conducted in a dark room or against a black background. Such an environment can reduce the potential impact of image processing on rainbow pattern recognition, ensuring the quality of image acquisition and the accuracy of subsequent analysis.

[0071] In optional embodiments, the image acquisition device 150 may be, but is not limited to, a conventional camera, a high-resolution digital camera, a thermal imaging camera, a spectral analyzer, or a multispectral imaging system, etc., and the present invention does not limit this.

[0072] The role of the control system 160 in the rainbow pattern detection device 10 in this embodiment of the present invention will be described next.

[0073] In one embodiment of this utility model, the control system 160 is used to control the sliding of the light source 110 and the semi-circular guide rail 120, and is also used to control the image acquisition device 150 to acquire rainbow pattern images. This design not only improves the convenience and efficiency of operation, but also enhances the performance and reliability of the entire detection system.

[0074] In one embodiment of the utility model, the process of the control system 160 controlling the sliding of the light source 110 and the semi-circular guide rail 120 includes: controlling the semi-circular guide rail 120 to traverse each azimuth angle within the azimuth angle adjustment range according to a preset azimuth angle scanning step size; and controlling the light source 110 to traverse each incident angle within the incident angle adjustment range according to a preset incident angle scanning step size for each azimuth angle traversed.

[0075] The aforementioned "incident angle scanning step size" refers to the change in the incident angle illuminating the waveguide sheet 170 each time. For example, if the step size is set to 5 degrees, the control system 160 will start from the initial incident angle and increase by 5 degrees each time until all preset incident angle ranges are covered. Similarly, the "azimuth angle scanning step size" refers to the change in the azimuth angle of the light source 110 relative to the waveguide sheet. If the step size is set to 10 degrees, the control system 160 will guide the light source 110 to each azimuth angle position until all preset azimuth angle ranges are covered. Users can flexibly set the incident angle scanning step size and azimuth angle scanning step size according to specific test requirements and conditions. The embodiments of this utility model do not impose specific limitations.

[0076] In one embodiment of the present invention, the process of the control system 160 controlling the image acquisition device 150 to perform image acquisition may include: controlling the image acquisition device 150 to perform at least one image acquisition whenever the control light source traverses an incident angle.

[0077] To facilitate understanding, let's continue with the example above. Assume the incident angle scanning step size is set to 5 degrees and the azimuth angle scanning step size is set to 10 degrees. Then, the semicircular guide rail 120 will rotate one full circle along the circular guide rail 130 starting from 0 degrees, pausing every 10 degrees. During the pause, the light source 110 will move along the semicircular guide rail 120 from 0 degrees to 90 degrees, taking an image every 5 degrees until the azimuth angle has traversed from -180 degrees to 180 degrees.

[0078] Through the above-described embodiments, the control system 160 can precisely control the position of the light source to cover all predetermined incident angle and azimuth angle combinations, and perform image acquisition at each position to achieve omnidirectional image acquisition, ensuring that clear and complete rainbow pattern images can be acquired for subsequent analysis and quantification.

[0079] In an alternative implementation, the control system 160 may be, but is not limited to, a PLC (Programmable Logic Controller) or a microcontroller, for controlling the starting, stopping, speed, and direction of the motor mentioned above.

[0080] To achieve the above functions, in an optional implementation, please refer to [link to relevant documentation]. Figure 10 , Figure 10 A functional block diagram of the control system provided in an embodiment of this utility model. Figure 10 In the system, the control system 160 includes a control module 1601, a storage module 1602, an image processing module 1603, and a motor drive module 1604.

[0081] The control module 1601 receives motion commands and converts them into control commands, which are then sent to the motor drive module 1604. The motor drive module 1604 drives the motor to rotate according to the control commands, thereby controlling the sliding effect of the light source 110 and the semi-circular guide rail 120. The storage module 1602 stores the rainbow image captured by the image acquisition device 150, and also stores the incident angle and azimuth angle of the light source when each rainbow image is captured, for later quantitative analysis of the severity of the rainbow.

[0082] In one embodiment of this invention, to enhance user experience and ease of operation, the control system 160 may also be equipped with a user-friendly interactive interface. This interface not only allows the operator to input key parameters, such as sliding speed and step size, including incident angle scanning step size and azimuth angle scanning step size, but also makes receiving start or stop commands intuitive and simple, thereby precisely controlling the acquisition process of the rainbow pattern image.

[0083] In an alternative implementation, the interface can be further optimized, for example, by adding a preview area. This preview area displays the rainbow pattern image captured by the image acquisition device 150, allowing users to view and evaluate in real time whether the captured image meets the expected standards. For example, users can intuitively judge whether the image clarity is sufficient and whether the rainbow pattern is displayed completely through the preview area to obtain the best image results.

[0084] In this embodiment of the invention, the image processing module 1603 performs image analysis based on the rainbow pattern image stored in the storage module 1602 to complete rainbow pattern recognition and quantization. Specifically, the rainbow pattern recognition process may include the following steps:

[0085] The first step is to perform two-dimensional wavelet decomposition on the original rainbow pattern image and extract the low-frequency component coefficients cA and the high-frequency component coefficients in the horizontal cH, vertical cV and diagonal cD directions respectively.

[0086] The second step is to add the extracted low-frequency component coefficients and high-frequency component coefficients together and then perform upsampling by a factor of two to obtain a coefficient matrix with the same size as the image. The coefficient matrix is ​​then pseudo-color encoded to obtain a new image data with enhanced rainbow patterns.

[0087] The third step is to calculate the variance of the R, G, and B channel values ​​for each pixel in the new image data obtained in the second step. Considering that the R, G, and B channel values ​​in the rainbow pattern area are much different from those in the background image, the variance calculation can further distinguish the rainbow pattern area from the background area.

[0088] The fourth step is to separate the rainbow pattern region in the new image by thresholding. Then, using this rainbow pattern region as the target region, the region can be cropped from the original rainbow pattern image.

[0089] like Figure 11 and Figure 12 As shown, Figure 11 This is a schematic diagram of a rainbow pattern image acquired by the rainbow pattern detection device provided in an embodiment of this utility model. Figure 12 For the purposes of this utility model embodiment Figure 11 The diagram illustrates the effect of rainbow pattern recognition on a rainbow pattern image. It is clearly shown that this embodiment of the invention can accurately identify rainbow patterns through the above steps.

[0090] Furthermore, this embodiment of the invention can also quantify rainbow pattern information based on the rainbow pattern recognition results. The quantifiable information includes, but is not limited to: 1. Area proportion, i.e., the proportion of the rainbow pattern area in the entire image area; 2. Intensity information, i.e., the total pixel value of the rainbow pattern area; 3. Angle range, i.e., the range of incident angles of the light source that causes the rainbow pattern. Based on this information, this embodiment of the invention can also provide a method for comprehensively quantifying the severity of the rainbow pattern. Specifically:

[0091] Assuming we ultimately calculate the incident angle range of the light source that produces the rainbow effect (theta), the area ratio of the rainbow region (R), and the total pixel value of the rainbow region (P), then the severity of the rainbow effect can be defined by combining these parameters as: Score = w1*R + w2*P + w3*theta. Here, w1, w2, and w3 are the weight parameters for R, P, and theta, respectively. The specific values ​​of these weight parameters can be adjusted according to the parameters of interest. The weight parameters satisfy the normalization condition: w1 + w2 + w3 = 1. The Score represents the severity of the rainbow effect; a higher Score indicates a more severe rainbow effect.

[0092] Through the above implementation methods, this utility model embodiment can automatically realize rainbow image acquisition, rainbow detection, and recognition using a rainbow detection device, quantify the severity of the rainbow effect on the waveguide sheet, and achieve a simple and efficient detection process.

[0093] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0094] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A rainbow pattern detection device, characterized in that, include: The system comprises a light source, a semi-circular guide rail, a circular guide rail, a waveguide support, an image acquisition device, and a control system. The image acquisition device is electrically connected to the control system. The light source is movably mounted on the semi-circular guide rail. Both ends of the semi-circular guide rail are movably mounted on the circular guide rail. The waveguide support is used to support the waveguide sheet. The control system is used to control the sliding of the light source and the semi-circular guide rail, and also to control the image acquisition device to acquire rainbow pattern images.

2. The rainbow pattern detection device according to claim 1, characterized in that, The light source is slidably connected to the semicircular guide rail via a first sliding element; both ends of the semicircular guide rail are slidably connected to the circular guide rail via second sliding elements; the control system is used to control the first sliding element to drive the light source to slide, and to control the second sliding element to drive the semicircular guide rail to slide.

3. The rainbow pattern detection device according to claim 2, characterized in that, The sliding element is any of the following: an electric pulley; a non-electric pulley; or a slider.

4. The rainbow pattern detection device according to claim 3, characterized in that, When the sliding element is the electric pulley, the control system is electrically connected to the built-in motor of the electric pulley.

5. The rainbow pattern detection device according to claim 3, characterized in that, When the sliding element is a non-electric pulley or slider, the semi-circular guide rail is further provided with a first transmission device and a first motor; the circular guide rail is further provided with a second transmission device and a second motor; the first transmission device is connected to the first sliding element and the first motor respectively; the second transmission device is connected to the second sliding element and the second motor respectively; the first motor and the second motor are both electrically connected to the control system.

6. The rainbow pattern detection device according to any one of claims 2-5, characterized in that, The semi-circular guide rail is provided with a support structure, and the light source is mounted on the support structure; the support structure is connected to the first sliding element.

7. The rainbow pattern detection device according to claim 1, characterized in that, When the light source slides on the semicircular guide rail, the incident angle of the light illuminating the waveguide sheet is adjusted; when the semicircular guide rail slides on the circular guide rail, the azimuth angle of the light source relative to the waveguide sheet is adjusted.

8. The rainbow pattern detection device according to any one of claims 1-5 and 7, characterized in that, The semicircular guide rail is a rigid guide rail.

9. The rainbow pattern detection device according to claim 7, characterized in that, The control system is specifically used to control the semi-circular guide rail to traverse each azimuth angle within the azimuth angle adjustment range according to a preset azimuth angle scanning step size. For each azimuth angle traversed, the light source is controlled to traverse each incident angle within the incident angle adjustment range according to a preset incident angle scanning step size. The control system is further specifically configured to control the image acquisition device to acquire images for each occurrence of the incident angle.

10. The rainbow pattern detection device according to claim 9, characterized in that, The control system also includes an interactive interface; the interactive interface is used to receive start or stop commands and to respond to input operations to obtain the incident angle scan step size and the azimuth angle scan step size.

Images