VR modular optical system for AI glasses and AI intelligent glasses

Abstract

The embodiment of the invention provides a VR modular optical system for AI glasses and AI intelligent glasses. Wherein the VR modular optical system sequentially comprises a display, a VR imaging lens group and AI glasses lenses from an image source side to a human eye side along an optical axis; wherein the display is used for providing imaging display light; optical elements included in the VR imaging lens group are arranged to be capable of forming a folded light path; the AI glasses lenses can be configured to be diopter adjusting lenses matched with the diopter of a user; wherein the VR imaging lens group and the display jointly form a detachable VR module, and the VR module is configured to be detachably connected to the side, away from the human eyes, of the AI glasses lens, so that when the VR module is installed, a user can watch an image formed by imaging display light provided by the display; when the VR module is removed, a user can directly view a real environment through the AI glasses lenses.

Description

TECHNICAL FIELD

[0001] The embodiments of the present application relate to the technical field of optical imaging, and more particularly, to a VR modular optical system for AI glasses and AI smart glasses. BACKGROUND

[0002] With the rapid development of AI technology, AI smart glasses (such as Meta Rayban) are gradually popularized. The optical scheme of the AI smart glasses usually captures the external scene through a camera and displays it on the lens, but there are significant defects: first, the function is single, the lens itself lacks optical effects, only supports vision customization, and cannot provide immersive VR experience, limiting the user's demand for diversified scenes; second, the application scenarios are limited, and the traditional scheme is difficult to balance real environment observation and virtual content display, so the user needs to frequently switch the device between AI mode and VR mode, reducing the convenience of use; third, the structure is thick and heavy, and the traditional VR device is difficult to integrate into lightweight AI glasses due to its large size, resulting in a heavy overall smart glasses, which does not meet the development trend of portable wearable devices. SUMMARY

[0003] The purpose of the present application is to provide a new technical scheme of a VR modular optical system for AI glasses and AI smart glasses. The present application proposes a modular VR optical system to realize one lens for multiple uses of AI glasses through a detachable design, while meeting the needs of lightweight, high imaging quality and vision adaptation.

[0004] In a first aspect, the embodiments of the present application provide a VR modular optical system for AI glasses, which comprises, in order along the optical axis from the image source side to the human eye side:

[0005] a display for providing imaging display light;

[0006] a VR imaging lens group comprising optical elements arranged to form a folded optical path;

[0007] an AI glasses lens capable of being configured as a vision adjustment lens matched with the user's vision;

[0008] wherein the VR imaging lens group and the display together constitute a detachable VR module, and the VR module is configured to be detachably connected to the side of the AI glasses lens away from the human eye, so that when the VR module is installed, the user can watch the image formed by the imaging display light of the display; when the VR module is removed, the user can directly watch the real environment through the AI glasses lens.

[0009] Optionally, the optical parameters of the VR imaging lens group and the AI glasses lens satisfy a relationship: -0.134≤EFL VR / EFL AI ≤0, where EFL VR is an effective focal length of the VR imaging lens group, and EFL AI is an effective focal length of the AI glasses lens.

[0010] Optionally, the optical parameters of the VR imaging lens group and the AI glasses lens satisfy a relationship: 0.039≤TTL VR / ETV AI ≤0.06, where TTL VR is a total length of the VR imaging lens group, and ETV AI is an edge thickness of the AI glasses lens.

[0011] Optionally, the total length TTL VR of the VR imaging lens group is less than 26mm.

[0012] Optionally, the edge thickness ETV AI of the AI glasses lens is 1mm-1.5mm.

[0013] Optionally, the AI glasses lens is configured to fit a refractive power of 0D to -5D, and can be applied to users with no myopia to 500 degrees of myopia.

[0014] Optionally, the effective focal length EFL AI of the AI glasses lens is -∞-200mm.

[0015] Optionally, the VR imaging lens group comprises at least one aspherical lens, and a material of the at least one aspherical lens comprises at least one of PMMA, APL5014XH, K26R or MR material.

[0016] Optionally, a system total length of the VR modular optical system is less than 27mm.

[0017] Optionally, the VR module satisfies, in terms of image quality, that a spot size at a most peripheral field of view is less than 72μm, and a spot size at a single-side 20-degree field of view is less than 20μm.

[0018] In a second aspect, an embodiment of the present application provides an optical device, the optical device comprising:

[0019] a housing; and

[0020] the optical display system as in the first aspect.

[0021] The present application has the following beneficial effects:

[0022] The VR modular optical system for AI glasses provided by the embodiment of the present application realizes the effect of "one mirror with multiple functions" by designing the display and the VR imaging lens group to be integrated into a detachable VR module and detachably connected to the side of the AI glasses lens away from the human eye, for example, when the VR module is installed, the user can immerse in the high-definition virtual reality scene and enjoy the VR visual experience; and when the VR module is removed, the AI glasses lens can restore the transparent state to support the user to directly observe the real environment, which realizes the seamless switching of AI interaction modes. The optical design of the present application not only solves the defects of single function of traditional AI glasses and inability to balance virtual and real scenes, but also avoids the thick problem caused by the integration of VR equipment through the modular structure, and significantly improves the practicality and wearing comfort of smart glasses.

[0023] Other features of the present specification and its advantages will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present specification and, together with the description, serve to explain the principles of the present specification.

[0025] Figure 1 The VR modular optical system for AI glasses provided by the embodiment of the present application and the optical path schematic diagram one (AI glasses lens is configured with 0D degree of visual lens);

[0026] Figure 2 For Figure 1 The dot matrix diagram of the VR modular optical system for AI glasses is shown;

[0027] Figure 3 The VR modular optical system for AI glasses provided by the embodiment of the present application and the optical path schematic diagram two (AI glasses lens is configured with-3D degree of visual lens);

[0028] Figure 4 For Figure 3 The dot matrix diagram of the VR modular optical system for AI glasses is shown;

[0029] Figure 5 The VR modular optical system for AI glasses provided by the embodiment of the present application and the optical path schematic diagram one (AI glasses lens is configured with-5D degree of visual lens);

[0030] Figure 6 For Figure 5 The dot matrix diagram of the VR modular optical system for AI glasses is shown.

[0031] Reference Signs List:

[0032] 1, Display; A, VR module; 2, VR imaging lens group; 3, AI glasses lens;

[0033] 01, Human eye. DETAILED DESCRIPTION

[0034] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0035] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the scope of the application, its application, or uses.

[0036] Techniques and equipment known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered part of the specification where appropriate.

[0037] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of exemplary embodiments can have different values.

[0038] Note that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0039] The VR modular optical system for AI glasses and AI smart glasses provided by the embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0040] According to one embodiment of the present application, a VR modular optical system for AI glasses is provided, as shown in Figure 1 , Figure 3 and Figure 5The VR modular optical system for AI glasses sequentially comprises a display 1, a VR imaging lens group 2 and an AI glasses lens 3 from the image source side to the human eye side along the optical axis; the display 1 is used for providing imaging display light; the VR imaging lens group 2 comprises optical elements arranged to be capable of forming a folded optical path; the AI glasses lens 3 can be configured as a vision adjusting lens matched with the user's vision; wherein the VR imaging lens group 2 and the display 1 jointly constitute a detachable VR module A, and the VR module A is configured to be detachably connected to the side of the AI glasses lens 3 away from the human eye, so that when the VR module A is installed, the user can watch the image formed by the imaging display light provided by the display 1; when the VR module A is removed, the user can directly watch the real environment through the AI glasses lens 3.

[0041] The present application provides a modular, lightweight and function-switchable VR optical display system, which is designed for AI glasses, and realizes the fusion of virtual reality (VR) visual experience and real environment observation through a specially designed optical architecture and modular imaging components, while meeting the needs of user vision correction.

[0042] Referring to FIGS. 1 to 3, Figure 1 , Figure 3 and Figure 5 , the AI glasses lens 3 in the present application can be configured as a piano lens to be compatible with the function of ordinary smart glasses (i.e. AI glasses). At the same time, it supports personalized vision adjustment function, that is, it can be replaced with myopia (-5D to 0D) or hyperopia (0D to +5D) lens according to user needs to realize accurate matching of vision.

[0043] The VR modular optical system for AI glasses provided by the embodiments of the present application sequentially constructs a three-layer structure from the image source (i.e. the side where the display 1 is located) to the human eye 01 along the optical axis:

[0044] (1) Image generation layer: a micro display (such as OLED or Micro-LED) is used as an image source to generate a high-resolution virtual reality image;

[0045] (2) VR optical imaging layer: a folded optical path is designed by a plurality of optical elements in the optical path, such as lenses, light splitting elements, phase retarders, reflective polarizers, linear polarizers, etc., which can lengthen the optical path in a limited space, compress the size of the optical axis direction of the entire optical system, and at the same time ensure the imaging quality;

[0046] (3) User adaptation layer: the AI glasses lens integrates customized vision lenses such as myopia correction lenses or hyperopia correction lenses, which can support personalized vision adaptation of users.

[0047] The VR modular optical system provided in the application innovatively adopts a modular design, integrates the display 1 and the VR imaging lens group 2 into a detachable VR module A, as shown in the structure of the dashed box. Figure 1 The user only needs to simply install or remove the VR module A to realize flexible switching between two different modes. For example, when the VR module A is in the assembled state, the entire system can present an immersive virtual reality visual experience, and the user can interact with the virtual scene; after the VR module A is removed, the customized diopter adjustment function of the AI glasses lens 3 is immediately enabled, and the user can clearly observe the real environment through the lens. This "one lens for two purposes" design realizes good connection between the virtual and real scenes, and significantly improves the functional flexibility and use convenience of the smart glasses.

[0048] The traditional VR optical display device is large in size due to the straight light path, and is difficult to be integrated into lightweight glasses. In the application, the straight light path is changed to a folded light path design, so that the size of the entire VR modular optical system can be shortened. In the VR imaging lens group 2, for example, aspherical lenses or diffractive optical elements and other optical elements can be used to correct aberrations while reducing the number of optical elements used, thereby improving the imaging clarity. With such a design, the thickness of the VR module A can be significantly reduced compared to traditional devices, and can be well embedded in, for example, an AI glasses frame, balancing portability and immersion.

[0049] The VR module A provided in the application can also support quick plugging and adapting to different models of AI glasses. The VR imaging lens group 2 and the display 1 are packaged by structure to form a detachable VR module A. The module can be quickly installed in front of the eye side of the AI glasses lens 3 through a standardized interface design. The application designs a dual-mode switching mechanism: when the VR module A is in the installed state, the system enters the VR display mode, and the user views the virtual image generated by the display 1 through the folded light path; when the VR module A is removed, the system automatically switches to the ordinary smart glasses mode, and the user can directly observe the real environment through the AI glasses lens 3.

[0050] In addition, for the AI glasses lens 3 in the application, through the diopter customized lens, the diversified vision needs such as myopia and hypermetropia can be met, and the applicability of the device is expanded.

[0051] The VR modular optical system for AI glasses provided in the application embodiment, wherein the VR imaging lens group 2 design includes a folded light path assembly. Specifically, the folded light path assembly includes, for example, one or more lenses, and optical elements such as light splitting elements, phase retarders, reflective polarizers, and linear polarizers.

[0052] In the folding optical path assembly provided in the present application, the light splitting element, for example, a film or coating with specific light splitting characteristics, can be used to reflect and transmit the incident light according to a certain ratio.

[0053] Specifically, the light splitting element used in the present application can be a semi-transparent semi-reflective film, which allows a part of light to be transmitted and another part of light to be reflected.

[0054] It should be noted that the reflectivity and transmissivity of the light splitting element can be flexibly adjusted according to specific needs, which is not limited in the embodiments of the present application.

[0055] In the folding optical path assembly provided in the present application, the phase retarder can be used to change the polarization state of light, for example, to convert linearly polarized light into circularly polarized light, or to convert circularly polarized light into linearly polarized light.

[0056] Specifically, the phase retarder used in the present application can be a quarter-wave plate (QWP), which can be located at a specific position on the optical path between the light splitting element and the reflective polarizer. It adjusts the phase of light to ensure that the light can be correctly reflected or transmitted in the subsequent path.

[0057] In the folding optical path assembly provided in the present application, the reflective polarizer is an optical device that reflects horizontal linearly polarized light and transmits vertical linearly polarized light, or any other specific angle linearly polarized light and transmits linearly polarized light perpendicular to the angle. That is, the reflective polarizer can reflect or transmit light according to its polarization state. In the present application, the reflective polarizer interacts with a specific state of polarized light (such as S-polarized light or P-polarized light) to achieve specific path control of light.

[0058] Specifically, the reflective polarizer used in the present application can be a reflective polarizer (RP).

[0059] In the folding optical path assembly provided in the present application, the linear polarizer is one of the optical elements of the entire VR modular optical system, which cooperates with, for example, the reflective polarizer, the phase retarder, the light splitting element, etc., to jointly build the polarization state conversion system required by the folding optical path. It allows light with a specific polarization direction to pass through, while blocking light with a perpendicular polarization direction, providing polarization selection capability for the system.

[0060] Optionally, the phase retarder, the reflective polarizer, and the linear polarizer are sequentially stacked to form a composite optical film. In the present application, only the composite film needs to be attached to the surface of the lens by, for example, optical adhesive (OCA), simplifying the assembly process of the system.

[0061] The composite optical film material can further introduce an anti-reflection film, which is arranged on the side surface of the linear polarizer away from the reflective polarizer. After adding the anti-reflection film, the interface reflectivity near the side of the AI glasses lens 3 is significantly reduced, and the stray light energy is significantly reduced.

[0062] The VR modular optical system for AI glasses provided in the application can include 1-2 lenses.

[0063] Referring to Figure 1 , Figure 3 and Figure 5 , the two lenses shown in these figures are only typical component examples in the VR modular optical system. The VR modular optical system provided in the embodiments of the application includes but is not limited to the above two lens structures, and the number, type and arrangement of the lenses can be extended or adjusted according to specific optical design requirements. Optionally, the lenses can be glued or not glued.

[0064] The VR modular optical system for AI glasses provided in the embodiments of the application realizes the effect of "one lens for multiple purposes" by integrating the display 1 and the VR imaging lens group 2 into a detachable VR module A and detachably connecting the VR module A to the side of the AI glasses lens 3 away from the eye 01. Specifically, when the VR module A is installed, the user can immerse in a high-definition virtual reality scene and experience VR vision; and when the VR module A is removed, the AI glasses lens 3 immediately returns to a transparent state, supporting the user to directly observe the real environment, and realizing seamless switching of AI interaction modes. This optical design not only solves the defects of single function of traditional AI glasses and inability to consider virtual and real scenes, but also avoids the thick problem caused by VR device integration through the modular structure, and significantly improves the practicality and wearing comfort of smart glasses.

[0065] In some examples of the application, the optical parameters of the VR imaging lens group 2 and the AI glasses lens 3 satisfy the relationship: -0.134≤EFL VR / EFL AI ≤0, wherein EFL VR is the effective focal length of the VR imaging lens group 2, and EFL AI is the effective focal length of the AI glasses lens 3.

[0066] EFL VR is the effective focal length of the VR imaging lens group 2 (positive value, convex lens system). EFL AI is the effective focal length of the AI glasses lens 3 (negative value, concave lens, which can be used for myopia correction).

[0067] In the optical design proposed in the present application, in order to ensure that the optical system of the VR module A and the AI glasses lens 3 can work efficiently, while taking into account the imaging quality and the compactness of the system, the optical parameters of the two are optimized and matched. Specifically, by optimizing the ratio of the effective focal length of the VR imaging lens group 2 to the effective focal length of the AI glasses lens 3 to satisfy the relationship: -0.134≤EFL VR / EFL AI ≤0, the following technical effects can be achieved.

[0068] In the present application, the AI glasses lens 3 is, for example, a concave lens, that is, a myopic lens. The effective focal length of the concave lens is negative. For example, if the AI glasses lens 3 has a diopter of -5D (500 degrees of myopia), its focal length EFL AI =-200mm.

[0069] In the present application, the VR imaging lens group 2 can be composed of a positive focal length system, which is used to focus the image of the display 1 to a position that can be clearly observed by the human eye, and its effective focal length is positive.

[0070] Referring to Figure 1 , Figure 3 and Figure 5 , the VR imaging lens group 2, for example, adopts a positive focal length design, that is, EFL VR >0, and the optical structure is mainly composed of converging elements, such as convex lens groups.

[0071] The positive focal length optical elements in the VR imaging lens group 2 can converge the light emitted by the display 1, and then the negative focal length optical elements of the AI glasses lens 3 can diverge and project the light to the near field of the human eye, so that the human eye can see a clear image. In this process, the light path is folded into a Z-shaped structure, so that the total optical path of the optical system is compressed, and at the same time, by optimizing the focal length ratio of the VR imaging lens group 2 and the AI glasses lens 3, that is, satisfying -0.134≤EFL VR / EFL AI ≤0), it is ensured that the virtual image can be focused on the best observation area of the human eye 01.

[0072] When EFL VR / EFL AI approaches 0, for example, EFL VR =26.8mm, EFL AI =-200mm, the converging ability of the VR module A and the diverging ability of the AI glasses lens 3 can be balanced, so that the whole optical system wavefront aberration RMS value is controlled within 0.07λ (λ=550nm).

[0073] For example, when the AI glasses lens 3 is a myopic lens with a refractive power of -5D, an EFL AI of -200mm, the effective focal length of the VR imaging lens group 2 needs to be slightly shorter, such as an EFL VR of 26.8mm, to avoid excessive system total length of the entire optical system or degradation of imaging quality.

[0074] When the EFL VR / EFL AI approaches -0.134, the field curvature can be compensated by the aspherical lens in the optical path to ensure that the spot size is ≤12μm within a 20° field of view.

[0075] When the AI glasses lens 3 is a piano lens with a refractive power of 0D, the EFL AI is -∞, or the AI glasses lens 3 is a low myopic lens, the effective focal length of the VR imaging lens group 2 needs to be close to 0 to avoid the problem of being unable to image due to excessively weak system focal power.

[0076] By optimizing the range of EFL VR / EFL AI , the optical transfer function (MTF) of the VR module A and the AI glasses lens 3 is matched to avoid the problems of virtual image position deviation or resolution degradation caused by mismatched focal lengths. By optimizing the ratio range, the VR module A can adapt to the AI glasses lens 3 with a refractive power of 0D (piano) to -5D (500 degrees of myopia).

[0077] For example, if EFL VR / EFL AI >0, the final virtual image may not be correctly projected into the human eye comfort zone; if EFL VR / EFL AI <-0.134, excessive folding of the optical path may introduce uncorrectable aberrations.

[0078] This ratio relationship formula realizes the following technical effects by limiting the focal length matching range of the VR imaging lens group 2 and the AI glasses lens 3:

[0079] Wide refractive power compatibility: supports 0D to -5D myopic users;

[0080] Thin structure: the system total length of the VR module A is controlled to be <26mm;

[0081] High imaging quality: ensures that the edge and field spot size meet the standards.

[0082] In some examples of the present application, the optical parameters of the VR imaging lens group 2 and the AI glasses lens 3 satisfy the relationship formula: 0.039≤TTL VR / ETV AI ≤0.06, wherein TTL VR is the total length of the VR imaging lens group 2, EFL AI is the edge thickness of the AI glasses lens 3.

[0083] TTL VR is the total length of the VR imaging lens group 2, i.e., the axial distance from the first lens surface to the last lens surface (unit: mm). This parameter directly determines the physical thickness of the VR module and affects the light path folding space and lens assembly feasibility.

[0084] ETV AI is the edge thickness of the AI glasses lens 3 (unit: mm). This parameter reflects the thinness of the lens and is closely related to the wearing comfort.

[0085] TTL VR / ETV AI is the relative ratio of the thickness of the VR module A to the edge thickness of the AI glasses lens 3, which is used to quantify the thinness level of the system.

[0086] In the example of the application, the VR imaging lens group 2 contains at least 2 lenses cooperating with multiple optical films to form a folded light path, and needs to meet the imaging quality requirements. If the ratio in this example is too low, such as TTL VR is too small), the insufficient lens spacing will result in: the folded light path cannot be fully unfolded, the light propagation path is blocked; and the risk of lens interference increases, and the aberration is difficult to correct.

[0087] wherein the lower limit value of the ratio 0.039 limits the minimum thickness of the VR module A, ensuring that there is enough space inside the VR imaging lens group 2 to arrange light path elements, thereby maintaining optical performance under the premise of thinness. The control of the upper limit 0.06 of the ratio can be used to optimize the wearing comfort. In addition, the upper limit value 0.06 limits the maximum thickness of the VR module A, so that it maintains a reasonable ratio with the edge thickness of the AI glasses lens 3, avoiding the destruction of the overall thin structure of the glasses due to local excessive thickness, thereby improving the user wearing experience.

[0088] By optimizing the range of TTL VR / ETV AI , the present application achieves:

[0089] (1) Balance of optical performance and lightness: while ensuring the imaging quality of the VR module A, its thickness is controlled within the range of 3.9% to 6% of the edge thickness of the AI glasses lens 3, significantly reducing the overall thickness of the system.

[0090] (2) Improved wearing comfort: Avoids center of gravity shift or local pressure caused by excessive thickness of VR module A, and adapts to long-term wearing scenarios.

[0091] In some examples of this application, the total length TTL of the VR imaging lens group 2 is... VR <26mm.

[0092] In the VR optical design of this application, TTL VR Both optical path folding efficiency and image quality need to be considered. If TTL... VR If the TTL is too large, the VR module A will be too thick, thus affecting the wearing comfort of the device. VR If the space is too small, there will be insufficient space for optical path folding, which will lead to compression of the lens spacing and may cause increased aberrations or excessive spot size.

[0093] TTL is designed in this application VR <26mm, which indicates that the axial length of the VR module A is controlled within 26mm, which falls within the scope of thin and light design.

[0094] TTL in this application VR The thickness of the VR module A, less than 26mm, is significantly lower than traditional solutions, meeting the demand for thinner and lighter smart glasses and avoiding center of gravity shift or wear fatigue caused by excessive thickness. This application also achieves high-quality imaging within a limited space, supporting 0D to 5D diopter adjustment (for users with non-myopia up to 500 degrees of myopia), expanding the product's applicability. By shortening the TTL, this application reduces the axial dimensions of the lens group, lowers assembly precision requirements, and improves production yield.

[0095] In some examples of this application, the edge thickness ETV of the AI ​​eyeglass lens 3 is... AI It is 1mm to 1.5mm.

[0096] ETV AI The edge thickness of the AI ​​glasses lens 3. (ETV) AI This directly affects the thinness and lightness of the lenses and wearing comfort. (If ETV...) AI If the lens is too small, such as <1mm, its mechanical strength will be reduced, making it prone to breakage. (ETV) AI If the lens is too large, such as >1.5mm, it will be thick and heavy, increasing the feeling of pressure when wearing it.

[0097] In the example provided in this application, the edge thickness ETV of the AI ​​eyeglass lens 3 is... AI The thickness ranges from 1mm to 1.5mm, covering the edge thickness range from plano lenses (0D) to low-power myopia lenses such as -1.00D to -5.00D.

[0098] TTL VR<26mm with ETV AI The combination of 1mm-1.5mm makes the overall thickness of the VR module A and the AI glasses lens 3 significantly lower than the traditional scheme (such as VR module thickness > 30mm, lens edge thickness > 2mm), improving wearing comfort. The application population is expanded, and 0D-5D visual adjustment can be supported, covering non-myopic to 500-degree myopic users, enhancing product market competitiveness.

[0099] In some examples of the application, the AI glasses lens 3 is configured to adapt to 0D to -5D visual acuity, and can be applied to non-myopic to 500-degree myopic users.

[0100] The lens of the traditional AI glasses (such as Meta Rayban) has no optical visual acuity adjustment function, that is, it only supports flat 0D use scenarios, and myopic users need to wear contact lenses or custom visual acuity lenses, which has the problems of inconvenience and increased cost. Although some VR devices support visual acuity adjustment, the adjustment range is limited (such as only supporting ±3D), and cannot cover the medium-high myopia population (such as 500-degree myopic users).

[0101] The application realizes 0D to -5D visual acuity adjustment through the collaborative design of the AI glasses lens 3 and the VR module A, covering non-myopic to 500-degree myopic users, and improving product applicability and user experience.

[0102] The optical design of the embodiment of the application can realize inductive visual acuity adjustment, and the user does not need to replace the lens or wear contact lenses. The edge thickness of the AI glasses lens 3 is only 1mm-1.5mm, which is light in weight, suitable for long-time wearing scenarios, and reduces the feeling of nasal bridge compression. The application can cover non-myopic to 500-degree myopic users, and significantly improve the product application range.

[0103] Through the lens design adapting to 0D to -5D visual acuity, the application realizes the deep collaboration of AI glasses and VR modules, significantly improves the user coverage range and wearing comfort while ensuring the imaging quality. The optical design highlights the visual acuity limitation of traditional AI glasses, and provides a key solution for the lightweight and universal design of smart glasses.

[0104] In some examples of the application, the effective focal length EFL of the AI glasses lens 3 is -∞--200mm. AI -∞--200mm.

[0105] Traditional AI glasses lenses are mostly flat design, only supporting non-myopic users, and myopic users need to wear contact lenses or custom visual acuity lenses, resulting in complex use process and increased cost. Although some VR devices support visual acuity adjustment, the adjustment range is limited and cannot cover the medium-high myopia population (such as -5D corresponding to -200mm focal length).

[0106] In the present application, the effective focal length of the AI glasses lens 3 is EFL AI -∞~ -200mm, which realizes the coverage of the power adjustment lens for users from non-myopia (0D) to 500 degrees myopia (-5D).

[0107] Effective focal length EFL: refers to the distance from the focal point of parallel light converging after passing through the lens to the optical center of the lens. Negative value indicates that the lens is concave (myopia correction), positive value indicates convex (hyperopia correction).

[0108] In the example provided in the present application, the effective focal length EFL of the AI glasses lens 3 is AI -∞~ -200mm, specifically: when FL is -∞, it means that the corresponding plane mirror lens is 0D, no refractive power, the light rays do not converge after passing through, suitable for non-myopic users. When EFL is -200mm, it means -5D myopia, suitable for 500 degrees myopic users. Intermediate values, such as EFL = -400mm, correspond to -2.5D, such as 250 degrees myopic users.

[0109] By designing the effective focal length EFL of the AI glasses lens 3 AI -∞~ -200mm, the present application realizes the coverage of users from non-myopia to 500 degrees myopia, while ensuring imaging quality and wearing comfort. This technology breaks through the power limit of traditional AI glasses, providing a key solution for the lightweight and universal design of smart glasses, significantly improving the product market competitiveness.

[0110] In some examples of the present application, the VR imaging lens group 2 includes at least one aspheric lens, and the material thereof includes at least one of PMMA, APL5014XH, K26R or MR material.

[0111] The VR imaging lens group 2 designed in the present application realizes the balance of optical performance, thinness and cost control by adopting at least one aspheric lens and selecting at least one of PMMA, APL5014XH, K26R or MR material.

[0112] The aspheric lens can correct the aberration (such as spherical aberration, coma, astigmatism) of the traditional spherical lens through the optimization control of the curvature radius and high-order aspheric coefficient.

[0113] The optical material in this example of the present application is PMMA (polymethyl methacrylate), which is an optical plastic and has a lower cost than glass materials and is suitable for mass production. APL5014XH (modified acrylic resin) has high temperature resistance, can reduce lens deformation caused by changes in ambient temperature, and ensures the imaging quality of the VR module within a working range of -20°C to 60°C. It also has high surface hardness, reduces the risk of scratches during use, and prolongs the service life of the product. K26R (optical-grade polycarbonate) can compensate for chromatic aberration of subsequent lenses (such as PMMA) through high dispersion characteristics, achieving reduced chromatic aberration in the full field of view. MR material (thio glass mold resin) has a high refractive index, which significantly reduces the lens curvature radius and edge thickness.

[0114] In some examples of the present application, the total system length of the VR modular optical system is < 27 mm.

[0115] The present application optimizes the optical design and selects the material to compress the total system length of the entire VR modular optical system to 26.8 mm (less than 27 mm), significantly improving the thinness level of the system.

[0116] The total system length of the VR modular optical system provided by the present application is 26.8 mm, which is significantly shorter than the traditional VR optical system (TTL > 30 mm) and meets the thinness requirements of smart glasses. The shortened total system length helps to improve the comfort of long-term wear of the device.

[0117] In some examples of the present application, the VR module A meets the following requirements in terms of image quality: the spot size at the most marginal field of view is less than 72 μm, and the spot size at a single 20-degree field of view is less than 20 μm.

[0118] Most marginal field of view: refers to the maximum imaging angle range that can be covered by the optical system. The most marginal field of view is the most difficult area to control in terms of imaging quality, as the deflection angle of light through the lens is the largest and the aberrations (such as astigmatism, distortion, and chromatic aberration) are the most significant. If the spot size at the edge of the field of view is too large, it will cause image blurring, color distortion, or edge deformation.

[0119] The optical design provided by the embodiments of the present application has a most marginal field of view spot size < 72 μm, which makes the edge image clear and distinguishable.

[0120] Single 20-degree field of view: refers to a field of view angle of 20 degrees from the optical axis (0 degrees) to one side. For example, if the user looks straight ahead (0 degrees), the single 20-degree field of view corresponds to the picture area seen when the eye is turned 20 degrees to the right or left. The single 20-degree field of view is the core imaging area of the VR system and needs to ensure high definition and low distortion to support immersive experience. If the spot size in this area is too large, it will cause text / icon blurring, 3D object edge ghosting, and affect the interaction accuracy.

[0121] The optical design provided by the embodiments of the present application has a spot size of less than 20 μm in a single side 20-degree field of view, thereby improving the imaging clarity, color consistency and 3D effect of the VR module.

[0122] Optionally, a protective glass can be arranged on the light exit surface of the display 1.

[0123] Specifically, the protective glass in front of the display 1 can effectively isolate dust, fingerprints and other contaminants from the outside, thereby maintaining the cleanliness of the surface of the display 1. This is crucial for optical display systems, because any dirt on the screen surface can affect light transmission and image quality. By introducing a protective glass with a certain thickness, the tolerance of the optical module to dirt on the surface of the display 1 is significantly improved, ensuring the stability and reliability of the optical module.

[0124] The protective glass not only can isolate dirt, but also can effectively prevent the display screen 1 from being scratched, collided and other physical damage. This is of great significance to prolong the service life of the display screen 1 and improve the overall durability of the equipment.

[0125] The VR modular optical system for AI glasses provided by the present application is described in detail below through Examples 1 to 3.

[0126] Example 1

[0127] The VR modular optical system for AI glasses provided by Example 1, as shown in Figure 1 , sequentially includes, along the optical axis from the image source side to the human eye side:

[0128] a display 1 for presenting virtual reality images;

[0129] a VR imaging lens group 2 comprising optical elements arranged to form a folded optical path;

[0130] an AI glasses lens 3 which is a piano lens with a refractive power of 0D (no need for diopter adjustment);

[0131] wherein the VR imaging lens group 2 and the display 1 together constitute a detachable VR module A, and the VR module A is configured to be detachably connected to the side of the AI glasses lens 3 away from the human eye 01, so that when the VR module A is installed, the user can watch the virtual reality images provided by the display 1; when the VR module A is removed, the user can directly watch the real environment through the AI glasses lens 3.

[0132] The optical parameters of the optical lens provided by Example 1 are shown in Table 1 below.

[0133] Table 1

[0134]

[0135]

[0136] When the VR module A is installed, the user can view the virtual reality image provided by the display 1, and the resulting imaging quality is as follows, see Figure 2 : the spot size at the most edge is less than 21um, the single side 20 degree spot size is less than 20um, and clear imaging can be achieved.

[0137] Embodiment 2

[0138] The VR modular optical system for AI glasses provided in this embodiment 2, see Figure 1 , sequentially includes, from the image source side to the human eye side along the optical axis:

[0139] The display 1 is used to present a virtual reality image;

[0140] The VR imaging lens group 2 contains optical elements arranged to be able to form a folded optical path;

[0141] The AI glasses lens 3 is a myopia adjusting lens, and the refractive power is-3D;

[0142] Wherein, the VR imaging lens group 2 and the display 1 jointly constitute a detachable VR module A, and the VR module A is configured to be detachably connected to the side of the AI glasses lens 3 away from the human eye 01, so that when the VR module A is installed, the user can view the virtual reality image provided by the display 1; when the VR module A is removed, the user can directly view the real environment through the AI glasses lens 3.

[0143] The optical parameters of the optical lens provided in this embodiment 2 are as shown in Table 2.

[0144] Table 2

[0145]

[0146]

[0147] When the VR module A is installed, the user can view the virtual reality image provided by the display 1, and the resulting imaging quality is as follows, see Figure 4 : the spot size at the most edge is less than 50um, the single side 20 degree spot size is less than 12um, and clear imaging can be achieved.

[0148] Embodiment 3

[0149] The VR modular optical system for AI glasses provided in Embodiment 3, see Figure 1 , sequentially includes, along the optical axis from the image source side to the human eye side:

[0150] a display 1 for presenting a virtual reality image;

[0151] a VR imaging lens group 2, the optical elements contained therein are arranged to be capable of forming a folded optical path;

[0152] AI glasses lenses 3, which are myopia adjustment lenses, with a refractive power of -5D;

[0153] wherein the VR imaging lens group 2 and the display 1 together constitute a detachable VR module A, and the VR module A is configured to be detachably connected to the side of the AI glasses lenses 3 away from the human eye 01, so that when the VR module A is installed, the user can watch the virtual reality image provided by the display 1; when the VR module A is removed, the user can directly watch the real environment through the AI glasses lenses 3.

[0154] The optical parameters of the optical lenses provided in Embodiment 3 are as shown in Table 3.

[0155] Table 3

[0156]

[0157]

[0158] When the VR module A is installed, the user can watch the virtual reality image provided by the display 1, and the resulting imaging quality is as follows, see Figure 6 : the spot size at the edge is less than 72um, the spot size on one side is less than 20um, and clear imaging can be achieved.

[0159] According to another embodiment of the present application, an optical device is provided, which includes the near-eye optical display system as described above.

[0160] The optical device provided in the embodiments of the present application is, for example, a VR optical device, such as a VR glasses or a VR helmet, etc.

[0161] The specific implementation of the optical display device of the embodiments of the present application can refer to the above-mentioned embodiments of the near-eye optical display system, and therefore at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0162] The differences between the various embodiments are highlighted in the above embodiments, and the different optimization features between the various embodiments can be combined to form a more optimal embodiment as long as they are not contradictory. Considering the brevity of the writing, this will not be repeated here.

[0163] While certain embodiments of the application have been described in detail as set forth above, modifications and alterations to those embodiments will be apparent to those skilled in the art from this detailed description. It is intended that the scope of the application be limited by nothing other than the appended claims.

Claims

1. A VR modular optical system for AI glasses, characterized in that, Along the optical axis from the image source side to the human eye side, the following are included in sequence: Display (1), used to provide imaging display light; VR imaging lens group (2), the optical elements contained therein are arranged to form a folded optical path; AI glasses lens (3), which can be configured as a diopter-adjusting lens that matches the user's diopter; The VR imaging lens group (2) and the display (1) together constitute a detachable VR module (A), and the VR module (A) is configured to be detachably connected to the side of the AI ​​glasses lens (3) away from the human eye (01), so that when the VR module (A) is installed, the user can view the image formed by the imaging display light provided by the display (1); when the VR module (A) is removed, the user can directly view the real environment through the AI ​​glasses lens (3).

2. The VR modular optical system for AI glasses according to claim 1, characterized in that, The optical parameters of the VR imaging lens group (2) and the AI ​​glasses lens (3) satisfy the following relationship: -0.134≤EFL VR / EFL AI ≤0, where EFL VR EFL is the effective focal length of the VR imaging lens group (2). AI The effective focal length of the AI ​​eyeglass lens (3) is given.

3. The VR modular optical system for AI glasses according to claim 1 or 2, characterized in that, The optical parameters of the VR imaging lens group (2) and the AI ​​glasses lens (3) satisfy the following relationship: 0.039≤TTL VR / ETV AI ≤0.06, where TTL VR EFL is the total length of the VR imaging lens group (2). AI The edge thickness of the AI ​​eyeglass lens (3) is given.

4. The VR modular optical system for AI glasses according to claim 3, characterized in that, The total length TTL of the VR imaging lens group (2) VR <26mm.

5. The VR modular optical system for AI glasses according to claim 3, characterized in that, The edge thickness ETV of the AI ​​eyeglass lens (3) AI It is 1mm to 1.5mm.

6. The VR modular optical system for AI glasses according to claim 1, characterized in that, The AI ​​glasses lens (3) is configured to adapt to a visual acuity of 0D to -5D, which is suitable for users with no myopia up to 500 degrees of myopia.

7. The VR modular optical system for AI glasses according to claim 1 or 6, characterized in that, The effective focal length (EFL) of the AI ​​eyeglass lens (3) AI The range is from -∞ to -200mm.

8. The VR modular optical system for AI glasses according to claim 1, characterized in that, The VR imaging lens group (2) includes at least one aspherical lens, the material of which includes at least one of PMMA, APL5014XH, K26R or MR material.

9. The VR modular optical system for AI glasses according to claim 1, characterized in that, The total length of the VR modular optical system is <27mm.

10. The VR modular optical system for AI glasses according to claim 1, characterized in that, The VR module (A) meets the following image quality requirements: the spot size is less than 72 μm in the outermost field of view and less than 20 μm in a single-sided 20-degree field of view.

11. An AI smart glasses, characterized in that, include: Eyeglass frames; as well as, The VR modular optical system for AI glasses as described in any one of claims 1-10.

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