Additional lens and near-to-eye display system

Abstract

The invention provides an additional lens and a near-to-eye display system, and relates to the technical field of near-to-eye display, the additional lens is used for receiving light transmitted by a waveguide sheet in a glasses body and reflecting part of the received light to human eyes, and the waveguide sheet is used for transmitting diffracted light to the human eyes and the additional lens. The additional lens is arranged on the light leakage side of the coupling-out area of the waveguide sheet, the additional lens is used for receiving the light transmitted by the waveguide sheet in the glasses body, and part of the received light is reflected to the human eyes, so that more light is effectively utilized, energy loss caused by light leakage is reduced, the display effect of an image is improved, and the user experience is improved. The visual experience of the user is enhanced; in addition, leaked light is reflected through the additional lens, the possibility that spectators see image display content is reduced, and therefore privacy and safety of information are improved.

Description

Technical Field

[0001] This application relates to the field of near-eye display technology, and more particularly to an additional lens and a near-eye display system. Background Technology

[0002] Augmented Reality (AR) is a technology that seamlessly blends virtual information with the real world. Through AR, users can experience superimposed virtual information within a real environment, providing a sensory experience that transcends reality. AR glasses, as a crucial carrier of this technology, project virtual images directly into the wearer's field of vision, achieving a seamless integration of virtual and reality. To achieve lightweight and portability, diffractive waveguide technology is considered one of the ideal solutions for AR glasses design. Diffractive waveguide technology utilizes the diffraction properties of gratings to efficiently transmit images generated by a light engine to the human eye. Specifically, the image generated by the light engine enters the waveguide as light rays through diffraction, and then diffracts again in the coupling region of the waveguide, projecting the light rays to the human eye, thus achieving information transmission and image display. However, in the coupling region, the image diffracts simultaneously to both sides of the waveguide, causing light to also emerge from the side of the waveguide furthest from the human eye; this light leakage is called light leakage. Light leakage can not only cause the content displayed by the AR glasses to be seen by onlookers, but also affect the image display quality due to energy loss.

[0003] In related technologies, to reduce the impact of light leakage, absorption elements or filters are typically placed on the leakage side of the waveguide coupling region to absorb or filter the leakage light, thus reducing the risk of information leakage to some extent. However, the problem of poor image display quality due to energy loss still exists. Summary of the Invention

[0004] This application provides an additional lens and a near-eye display system to improve the problem of poor image display effect caused by energy loss in related technologies.

[0005] In a first aspect, this application provides an additional lens for receiving light transmitted by a waveguide in the eyeglass body and reflecting a portion of the received light to the human eye, wherein the waveguide is used to transmit diffracted light to the human eye and the additional lens.

[0006] In one possible implementation, the additional lens includes an optical film for selectively reflecting the received light to reflect a portion of the received light to the human eye.

[0007] In one possible implementation, the optical thin film is formed by a metal coating and a dielectric coating.

[0008] In one possible implementation, the dielectric coating has at least one layer.

[0009] In one possible implementation, the material constituting the metal coating includes at least one of silver, aluminum, gold, copper, nickel, and chromium; and / or, the material constituting the dielectric coating includes at least one of titanium oxide, silicon oxide, tantalum oxide, aluminum oxide, niobium oxide, zinc oxide, and magnesium oxide.

[0010] In one possible implementation, the additional lens also includes a film carrier for the optical thin film, wherein the film carrier, the metal coating, and the dielectric coating are arranged in layers from bottom to top.

[0011] In one possible implementation, the material comprising the membrane carrier includes at least one of thin glass, resin, polycarbonate, and acrylic acid.

[0012] In one possible implementation, the areas of the film carrier, the metal coating, and the dielectric coating are the same.

[0013] In one possible implementation, the areas of the film carrier and the dielectric coating are the same, the area of ​​the metal coating is smaller than the area of ​​the film carrier, and the metal coating is divided into multiple sub-regions.

[0014] In a second aspect, this application provides a near-eye display system, including an eyeglass body and an additional lens as described in any one of the first aspects, wherein the additional lens is connected to the outside of the eyeglass body, and a waveguide sheet and a light engine are disposed in the eyeglass body;

[0015] The light engine is used to generate images and transmit them to the waveguide in the form of light rays;

[0016] Waveguide sheets are used to transmit diffracted light to the human eye and additional lenses;

[0017] An additional lens is used to reflect a portion of the received light back to the human eye.

[0018] In one possible implementation, the connection method between the eyeglass body and the additional lens includes at least one of magnetic attraction, adhesion, snap-fit, screw, sliding groove, clamping, suction cup and buckle.

[0019] The supplementary lens and near-eye display system provided in this application include a supplementary lens for receiving light transmitted from the waveguide sheet in the eyeglass body and reflecting a portion of the received light to the human eye. The waveguide sheet transmits diffracted light to the human eye and the supplementary lens. By placing the supplementary lens on the light leakage side of the waveguide sheet's coupling region, this application utilizes the supplementary lens to receive light transmitted from the waveguide sheet in the eyeglass body and reflects a portion of the received light to the human eye. This allows for more effective use of light, reduces energy loss due to light leakage, thereby improving image display quality and enhancing the user's visual experience. Furthermore, by reflecting light leakage, the likelihood of bystanders seeing the displayed content is reduced, thus improving information privacy and security. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] Figure 1 A schematic diagram of an additional lens provided for an exemplary embodiment of this application;

[0022] Figure 2 A schematic diagram of the structure of an additional lens provided for an exemplary embodiment of this application;

[0023] Figure 3 Another schematic diagram of an additional lens provided for an exemplary embodiment of this application;

[0024] Figure 4 Another schematic diagram of an additional lens provided for an exemplary embodiment of this application;

[0025] Figure 5 A schematic diagram of a near-eye display system provided as an exemplary embodiment of this application;

[0026] Figure 6 A schematic diagram illustrating the working principle of a near-eye display system provided as an exemplary embodiment of this application.

[0027] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0028] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0029] The terms “first,” “second,” etc., used in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, products, or apparatus.

[0030] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with relevant laws, regulations and standards, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0031] In related technologies, by setting absorption elements or filters on the light leakage side of the waveguide coupling area, the light leakage is simply absorbed or filtered, reducing the possibility that bystanders can see the displayed content and reducing the risk of information leakage to a certain extent. However, the energy loss caused by light leakage is not improved. Moreover, considering that the light intensity of the light leakage is on the same order of magnitude as the light intensity incident on the human eye, the energy lost due to light leakage seriously affects the display effect of the image.

[0032] To address the aforementioned issues, this application provides a solution for an additional lens and a near-eye display system. By placing an additional lens on the light leakage side of the waveguide coupling area, the additional lens selectively reflects a portion of the received light, i.e., the leaked light, and then superimposes this portion of light onto the incident light to the human eye via the waveguide in the eyeglass body. This allows for more effective utilization of light, reduces energy loss due to light leakage, thereby improving the image display effect and enhancing the user's visual experience. Furthermore, by reflecting the leaked light, the likelihood of bystanders seeing the displayed content is reduced, thus improving the privacy and security of user information.

[0033] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0034] Figure 1 A schematic diagram of an additional lens provided for an exemplary embodiment of this application. Figure 1 As shown, a waveguide 13 is provided in the eyeglass body 11, and an additional lens 12 is provided on the outside of the eyeglass body 11. Specifically, the additional lens 12 is provided on the light leakage side of the coupling area of ​​the waveguide 13. The additional lens 12 is used to receive the light transmitted by the waveguide 13 in the eyeglass body 11 and reflect part of the received light to the human eye.

[0035] The waveguide 13 is used to transmit diffracted light to the human eye and the additional lens 12. The waveguide 13 is a transparent optical element, including geometric waveguides, diffractive waveguides, or holographic waveguides. Accordingly, the waveguide 13 uses diffractive waveguide technology to diffract the incident image light through the grating structure of the waveguide 13. In the coupling region of the waveguide 13, the image is presented on both the inner and outer sides of the waveguide 13. The image displayed on the inner side of the waveguide, which is closer to the human eye, can reach the human eye, while the image displayed on the outer side of the waveguide 13 is light leakage. Correspondingly, the additional lens 12, which is connected to the outer side of the eyeglass body 11, selectively reflects the leaked light and superimposes this part of the light into the light incident to the human eye through the waveguide 13, so that more light is effectively utilized.

[0036] The additional lens provided in this application embodiment selectively reflects a portion of the received light, i.e., the light leakage, and then superimposes this portion of light onto the light incident on the human eye through a waveguide in the eyeglass body. This allows more light to be effectively utilized, reduces energy loss caused by light leakage, thereby improving the image display effect and enhancing the user's visual experience. In addition, by reflecting the light leakage, the possibility of bystanders seeing the displayed content is reduced, thereby improving the privacy and security of information.

[0037] In some embodiments, the additional lens includes an optical film for selectively reflecting the received light to reflect a portion of the received light to the human eye.

[0038] The optical thin film is composed of multiple layers of dielectric materials. By precisely controlling the thickness and refractive index of each layer, it can efficiently reflect light within a specific angle and wavelength range, while allowing other light to pass through. Correspondingly, when image light is transmitted through the waveguide, some light will diffract in the coupling region of the waveguide and be transmitted to the human eye and the additional lens. After receiving this light, the optical thin film in the additional lens selectively reflects it. Specifically, according to preset optical characteristics, the optical thin film reflects light that conforms to a specific wavelength and angle of incidence back to the human eye. This selective reflection not only improves the brightness and contrast of the image but also reduces unnecessary light leakage, thereby protecting the user's privacy.

[0039] Based on the above embodiments, in some embodiments, the optical thin film is formed by a metal coating and a dielectric coating.

[0040] The metallic coating provides basic reflective properties, while the dielectric coating is precisely designed to adjust reflectivity, enabling selective reflection of light at specific wavelengths and angles. Correspondingly, by rationally designing the material and thickness of the dielectric coating, the optical thin film can selectively adjust reflectivity based on the three primary colors of red, green, and blue (RGB) and different incident angles, thereby ensuring color uniformity of light entering the eye and enhancing the user's visual experience.

[0041] In some embodiments, the dielectric coating has at least one layer.

[0042] For example, in one implementation, the dielectric coating has one layer.

[0043] In another implementation, the dielectric coating has two layers.

[0044] In another implementation, the dielectric coating has two or more layers.

[0045] For example, by utilizing the transfer matrix algorithm, dielectric coatings with different numbers of layers can be designed to achieve specific reflectivity characteristics for different wavelengths and incident angles. This multi-layer design allows for finer control over the reflection characteristics of light, ensuring optimal image display under various usage conditions and maintaining high-quality visual performance under different ambient light conditions.

[0046] In some embodiments, the materials constituting the metal coating include at least one selected from silver, aluminum, gold, copper, nickel, and chromium.

[0047] For example, in one implementation, the material constituting the metal coating includes any one of silver, aluminum, gold, copper, nickel, and chromium; for instance, the material constituting the metal coating is silver.

[0048] In another implementation, the materials constituting the metal coating include any combination of silver, aluminum, gold, copper, nickel, and chromium; for example, the materials constituting the metal coating are silver and aluminum, which are often used in applications requiring efficient reflection of visible light due to their high reflectivity and relatively low cost; or, the materials constituting the metal coating are gold and copper, which are suitable for occasions requiring specific spectral reflection due to their unique optical properties; and so on.

[0049] In some embodiments, the materials constituting the dielectric coating include at least one of titanium oxide, silicon oxide, tantalum oxide, aluminum oxide, niobium oxide, zinc oxide, and magnesium oxide.

[0050] For example, in one implementation, the material constituting the dielectric coating includes any one of titanium oxide, silicon oxide, tantalum oxide, aluminum oxide, niobium oxide, zinc oxide, and magnesium oxide. For instance, the material constituting the dielectric coating is silicon oxide.

[0051] In another implementation, the materials constituting the dielectric coating include any combination of titanium oxide, silicon oxide, tantalum oxide, aluminum oxide, niobium oxide, zinc oxide, and magnesium oxide. For example, the materials constituting the dielectric coating may be titanium oxide and tantalum oxide, which have high refractive indices and are suitable for multilayer structures requiring high reflectivity; or, the materials constituting the dielectric coating may be silicon oxide and aluminum oxide, which, due to their stable optical properties and low absorption characteristics, are often used as intermediate layers to adjust the overall optical properties; and so on.

[0052] In this embodiment of the application, by rationally selecting and combining the materials of the metal coating and the dielectric coating, the optical thin film can achieve specific reflectivity characteristics at different wavelengths and incident angles. This design not only improves the image display effect, but also enhances its adaptability under different lighting conditions.

[0053] In some embodiments, the additional lens also includes a film carrier for the optical thin film, wherein the film carrier, the metal coating, and the dielectric coating are arranged in layers from bottom to top.

[0054] For example, Figure 2 A schematic diagram of the structure of an additional lens provided for an exemplary embodiment of this application. (See diagram below.) Figure 2 As shown, the additional lens 12 also includes a film carrier 121 for the optical thin film. The film carrier 121, the metal coating 122, and the dielectric coating 123 are arranged in layers from bottom to top. The film carrier, also known as the substrate, is usually made of a transparent material. As the base layer of the optical thin film, the film carrier provides mechanical support, ensuring that other coatings can be evenly distributed and adhered, thereby ensuring the stability and durability of the entire optical thin film structure.

[0055] In some embodiments, the materials constituting the membrane carrier include at least one of thin glass, resin, polycarbonate, and acrylic acid.

[0056] Thin glass offers excellent optical transparency and scratch resistance while maintaining low weight, making it suitable for applications requiring high optical quality and durability, providing clear image transmission and good mechanical strength. Resin materials typically possess good optical properties and plasticity, easily processed into complex shapes, suitable for devices requiring flexible design and lightweight construction, and offering a certain degree of impact resistance. Polycarbonate is known for its high strength and impact resistance, while also possessing good optical transparency, making it suitable for applications requiring high durability and safety, and capable of withstanding significant physical impacts. Acrylic materials offer excellent optical transparency and low density, are easy to process and mold, suitable for designs requiring lightweight and high transparency, and provide good optical performance and cost-effectiveness; and so on.

[0057] For example, in one implementation, the material constituting the membrane carrier includes any one of thin glass, resin, polycarbonate, and acrylic acid. For instance, the material constituting the membrane carrier is resin.

[0058] In another implementation, the materials constituting the membrane carrier include any combination of thin glass, resin, polycarbonate, and acrylic acid. For example, the materials constituting the membrane carrier include thin glass and resin.

[0059] In this embodiment of the application, by optimizing the material selection of the film carrier, the additional lens can provide better wearing comfort and visual experience; and the appropriate material selection not only improves the performance of the optical film, but also enhances the overall durability and adaptability of the device.

[0060] In some embodiments, the areas of the film carrier, the metal coating, and the dielectric coating are the same.

[0061] For example, Figure 3 Another schematic diagram of an additional lens provided for an exemplary embodiment of this application. (See diagram below.) Figure 3As shown, the areas of the film carrier, metal coating, and dielectric coating in this additional lens are consistent. Correspondingly, this type of additional lens can effectively reflect most of the leaked light from the image, allowing the reflected light energy to pass through the waveguide and enter the human eye. For example, assuming the waveguide grating refractive index is 1.7, the grating period is 400 nm, the depth is 40 nm, the duty cycle is 0.5, the incident angle of the coupling region of the waveguide is 51.5°, and the diffraction angle is 0°; and assuming the diffraction efficiency of the waveguide output region near the human eye is approximately 1.7%, the diffraction efficiency on the other side is approximately 2.4%, and the vertical field of view transmittance of the waveguide is 90%; based on the above data, it can be concluded that the leaked light energy recovered by the reflective layer is approximately 120% of the energy entering the eye. Therefore, the intensity of light incident on the human eye can be significantly enhanced by the additional lens.

[0062] Accordingly, near-eye display systems that include the additional lens are particularly suitable for scenarios such as watching movies, playing games, and reading where real-time observation of the surrounding environment is not required. If it is necessary to view the surrounding environment, the additional lens can be removed. At this time, the near-eye display system without the additional lens is the same as a conventional near-eye display system, and the user can view virtual images and external environmental information at the same time.

[0063] In this embodiment, by setting the areas of the film carrier, the metal coating, and the dielectric coating to be the same, most of the leaked light can be effectively reflected, significantly enhancing the intensity of light incident on the human eye, so that the image can maintain high brightness and high contrast in both indoor and outdoor environments.

[0064] In some embodiments, the areas of the film carrier and the dielectric coating are the same, the area of ​​the metal coating is smaller than the area of ​​the film carrier, and the metal coating is divided into multiple sub-regions.

[0065] For example, Figure 4 Another schematic diagram of an additional lens provided for an exemplary embodiment of this application. (See diagram below.) Figure 4 As shown, the areas of the film carrier and the dielectric coating are the same, while the metal coating is divided into multiple sub-regions, the total area of ​​which is smaller than the area of ​​the film carrier. Correspondingly, this design allows the additional lens to reflect some of the leaked light from the image, enabling the reflected light energy to pass through the waveguide and reach the human eye. Because the metal coating does not completely fill the area of ​​the additional lens, ambient light can pass through the uncoated areas and enter the human eye, allowing the eye to see surrounding information. Consequently, when using a near-eye display system incorporating this additional lens indoors or outdoors, it is not necessary to remove the additional lens. Its applications can include watching movies, playing games, reading, information prompts, real-time translation, and map navigation.

[0066] In this embodiment, by making the areas of the film carrier and the dielectric coating the same, while dividing the metal coating into multiple sub-regions with a total area smaller than that of the film carrier, some ambient light is allowed to pass through the uncoated areas. This allows users to simultaneously see virtual images and information about their surroundings without removing the additional lens. Through this well-designed coating, the additional lens is suitable for various applications, including watching movies, playing games, reading, receiving information prompts, real-time translation, and map navigation, providing a superior visual experience in both indoor and outdoor environments.

[0067] The above embodiments illustrate the implementation of the additional lens. Next, we will introduce the application of the additional lens in near-eye display systems.

[0068] Figure 5 A schematic diagram of a near-eye display system provided as an exemplary embodiment of this application. (See diagram below.) Figure 5 As shown, the near-eye display system 10 includes an eyeglass body 11 and an additional lens 12 as described in the above embodiment. The additional lens 12 is connected to the outside of the eyeglass body 11. The eyeglass body 11 is provided with a waveguide 13 and a light engine 14.

[0069] The light engine 14 is used to generate images and transmit the images to the waveguide 13 in the form of light rays;

[0070] Waveguide 13 is used to transmit the diffracted light to the human eye and additional lenses;

[0071] Additional lens 12 is used to reflect a portion of the received light back to the human eye;

[0072] In addition, the outer side of the eyeglass body 11 is connected to the additional lens 12 via a connecting component 15.

[0073] Among them, the near-eye display system 10 can be, for example, augmented reality glasses, virtual reality (VR) devices, and extended reality (XR) devices. Correspondingly, such as Figure 5As shown, the near-eye display system 10 consists of a glasses body 11 and an additional lens 12, with the additional lens 12 disposed on the outside of the glasses body 11. The light engine 14 is installed in the temple of the glasses body 11 and can typically use technologies such as Digital Light Processing (DLP), Micro Light Emitting Diode (MicroLED), Liquid Crystal on Silicon (LCOS), and Laser Beam Scanning (LBS) to generate virtual images and output the images as light to the waveguide plate 13. The waveguide plate 13 is embedded in the frame of the glasses body 11 and uses diffractive waveguide technology to transmit the diffracted light to the human eye and the additional lens.

[0074] For example, Figure 6 A schematic diagram illustrating the working principle of a near-eye display system provided as an exemplary embodiment of this application. Figure 6 As shown, the image light emitted by the light engine 14 is coupled into the waveguide 13 and output to both sides from the coupling area of ​​the waveguide 13. The image displayed on the inner side of the waveguide 13, which is closer to the human eye, reaches the human eye, while the image displayed on the outer side of the waveguide 13 is light leakage. The leakage light is incident on the optical film of the auxiliary lens 12, and the optical film selectively reflects the leakage light. This light is then superimposed on the light incident on the human eye through the waveguide 13. Since the two images are identical, there are no aberrations or other problems. Therefore, by reflecting part of the received light to the human eye through the auxiliary lens, more light can be effectively utilized, thereby improving the image display effect and enhancing the user's visual experience.

[0075] In some embodiments, the connection method between the eyeglass body and the additional lens includes at least one of magnetic attraction, adhesion, snap-fit, screw, sliding groove, clamping, suction cup and buckle.

[0076] For example, in one implementation, the connection method between the eyeglass body and the additional lens is any one of magnetic attraction, adhesion, snap-fit, screw, sliding groove, clamping, suction cup, and buckle. For example, Figure 5 The connecting component 15 is a magnetic contact or a magnetic ring; correspondingly, magnetic contacts or magnetic rings are installed on the outer side of the eyeglass body 11 and at corresponding positions on the additional lens 12, so that the two are attracted together by magnetic force to achieve a stable connection; or Figure 5 The connecting component 15 is made of resin or optical adhesive, etc., and the additional lens 12 is fixed to the eyeglass body 11 by using resin or optical adhesive at the corresponding positions on the outside of the eyeglass body 11 and the additional lens 12.

[0077] In another implementation, the connection between the eyeglasses body and the additional lens can be any combination of magnetic attraction, adhesion, snap-fit, screws, sliding grooves, clamps, suction cups, and buckles. For example, Figure 5 The eyeglasses body 11 and the additional lens 12 are connected by a combination of magnetic attraction and snap-fit. Correspondingly, the connecting assembly 15 includes magnetic contacts and snap-fit ​​structures; accordingly, magnetic contacts and snap-fit ​​structures are installed on the outer side of the eyeglasses body 11 and at corresponding positions on the additional lens 12. The magnetic attraction provides initial adsorption and positioning, and the snap-fit ​​structure provides additional mechanical fixation, thereby achieving a stable connection between the eyeglasses body and the additional lens.

[0078] The augmented reality glasses provided in this application, by setting an additional lens connected to the outside of the glasses body of the near-eye display system, can effectively reflect the light transmitted from the light leakage side of the waveguide coupling area, and then project this light back to the human eye through the waveguide, so that more light is effectively utilized, reducing energy loss caused by light leakage, thereby improving the display effect of the image and enhancing the user's visual experience; in addition, by reflecting the light leakage, the possibility of bystanders seeing the content displayed by the near-eye display system is reduced, thereby improving the privacy and security of information.

[0079] In summary, this application has at least the following advantages:

[0080] First, by selectively reflecting a portion of the received light (i.e., the light leaking out), and then superimposing this portion of light onto the light incident on the human eye through a waveguide in the eyepiece itself, more light is effectively utilized, reducing energy loss caused by light leakage, thereby improving the image display effect and enhancing the user's visual experience. In addition, by reflecting the light leaking out, the possibility of bystanders seeing the displayed content is reduced, thereby improving the privacy and security of information.

[0081] Second, by rationally selecting and combining the materials of metal coating and dielectric coating, optical thin films can achieve specific reflectivity characteristics at different wavelengths and incident angles. This design not only improves the image display effect of augmented reality glasses, but also enhances their adaptability under different lighting conditions.

[0082] Third, by setting an additional lens connected to the outside of the glasses body of the near-eye display system, energy recovery of light leakage from the waveguide sheet can be achieved, and the brightness and color of the image observed by the human eye can be compensated, thereby improving the image display effect and enhancing the user's visual experience; in addition, by reasonably adjusting the coating area and coating type of the additional lens, the image display needs of different application scenarios can be met.

[0083] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0084] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An additional lens, characterized in that, The waveguide is used to receive light transmitted by the waveguide in the eyeglass body and reflect a portion of the received light to the human eye, wherein the waveguide is used to transmit diffracted light to the human eye and the additional lens.

2. The additional lens according to claim 1, characterized in that, The additional lens includes an optical film that selectively reflects the received light so as to reflect a portion of the received light to the human eye.

3. The additional lens according to claim 2, characterized in that, The optical thin film is formed by a metal coating and a dielectric coating.

4. The additional lens according to claim 3, characterized in that, The dielectric coating has at least one layer.

5. The additional lens according to claim 3, characterized in that, The materials constituting the metal coating include at least one of silver, aluminum, gold, copper, nickel, and chromium; And / or, the materials constituting the dielectric coating include at least one of titanium oxide, silicon oxide, tantalum oxide, aluminum oxide, niobium oxide, zinc oxide, and magnesium oxide.

6. The additional lens according to any one of claims 3 to 5, characterized in that, The additional lens also includes a film carrier for the optical thin film, wherein the film carrier, the metal coating, and the dielectric coating are arranged in layers from bottom to top.

7. The additional lens according to claim 6, characterized in that, The materials constituting the membrane carrier include at least one of thin glass, resin, polycarbonate and acrylic acid.

8. The additional lens according to claim 6, characterized in that, The areas of the film carrier, the metal coating, and the dielectric coating are the same.

9. The additional lens according to claim 6, characterized in that, The area of ​​the film carrier and the dielectric coating are the same, the area of ​​the metal coating is smaller than the area of ​​the film carrier, and the metal coating is divided into multiple sub-regions.

10. A near-eye display system, characterized in that, The glasses include a main body and an additional lens as described in any one of claims 1 to 9, the additional lens being connected to the outside of the main body, wherein the main body is provided with a waveguide and a light engine; The optical engine is used to generate an image and transmit the image to the waveguide sheet in the form of light rays; The waveguide sheet is used to transmit the diffracted light to the human eye and the additional lens; The additional lens is used to reflect a portion of the received light back to the human eye.

11. The near-eye display system according to claim 10, characterized in that, The connection method between the eyeglass body and the additional lens includes at least one of magnetic attraction, adhesion, snap fastener, screw, sliding groove, clamping, suction cup, and buckle.

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