AR light machine module, AR glasses, AR display system and AR display method

Abstract

The embodiment of the invention provides an AR light machine module, AR glasses, an AR display system and an AR display method. The AR light machine module comprises a light source, an illumination waveguide, an imaging lens, an LCOS panel, a diaphragm and a polarization control assembly. The light source provides illumination light; the illumination waveguide is provided with an entrance pupil area and an exit pupil area, and the illumination light is coupled in from the entrance pupil area and is coupled out from the exit pupil area; the imaging lens is used for geometrically amplifying the illumination light coupled out of the exit pupil region; the LCOS panel is used for carrying out phase modulation on the amplified illumination light and forming imaging light, and the imaging light is projected to the exit pupil area through the imaging lens and then is emitted; the diaphragm is arranged on an imaging light path emitted by the exit pupil area and is used for adjusting the size of an exit pupil; the polarization control assembly comprises a polarization beam splitting film, and the polarization beam splitting film is located between the exit pupil area and the diaphragm and used for reflecting S-line polarized light and transmitting P-line polarized light.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical display technology. More specifically, the embodiments of the present application relate to an AR optical machine module, AR glasses, an AR display system and an AR display method. Background Art

[0002] With the rise of the concept of the metaverse, AR glasses, as a hardware carrier connecting the real and virtual worlds, have attracted much attention from the AR optical display industry. AR optical engines are the core optical devices in AR glasses, and improving their performance is crucial to promoting the development of AR technology.

[0003] Nowadays, there are two main technologies for AR optical machines - μLED optical machines and LCOS optical machines. Among them, LCOS technology has occupied a dominant position in the development of AR optical machines with its significant advantages of high resolution, high technical maturity and strong mass production. However, with the improvement of LCOS chip resolution and the continuous reduction of pixel size, the design requirements for optical machines are also constantly increasing. Existing technologies face severe challenges in this field and it is difficult to meet the stringent requirements of high-resolution LCOS chips for optical machines in terms of volume size, optical performance (including imaging clarity, large field of view FOV) and other aspects. Therefore, new technological breakthroughs are urgently needed to solve this problem in order to promote the further development of AR optical machine technology. Summary of the invention

[0004] The purpose of this application is to provide a new technical solution for an AR optical machine module, AR glasses, AR display system and AR display method.

[0005] In a first aspect, an embodiment of the present application provides an AR optical machine module. The AR optical machine module includes: A light source, for providing lighting; An illumination waveguide having an entrance pupil region and an exit pupil region, wherein the illumination light is coupled into the entrance pupil region and coupled out of the exit pupil region; An imaging lens, used for geometrically magnifying the illumination light coupled out from the exit pupil area; An LCOS panel, used for performing phase modulation on the illumination light amplified by the imaging lens and forming an imaging light, and the imaging light is then projected to the exit pupil area by the imaging lens and then emitted; An aperture, arranged on the imaging light path emitted from the exit pupil area, for adjusting the exit pupil size; The polarization control component comprises a polarization splitter film, wherein the polarization splitter film is located between the exit pupil area and the aperture, and is used for reflecting S-line polarization and transmitting P-line polarization.

[0006] Optionally, the image height of the LCOS panel is D, the total optical length of the AR optical machine module is L, and a ratio D / L between the two satisfies: 0.6<D / L<0.8.

[0007] Optionally, the polarization control component further comprises a polarizer, which is arranged on the optical path between the light source and the entrance pupil area, and is used to analyze the illumination light provided by the light source, and only allows S-line polarized light to pass through the entrance pupil area and enter the interior of the illumination waveguide.

[0008] Optionally, the imaging lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence along the same optical axis; wherein the first lens is located on a side close to the illumination waveguide, the sixth lens is located on a side close to the LCOS panel (4), and the imaging lens satisfies the following relationship: -0.3<( f 1+ f 2+ f 4) / ( f 3+ f 5+ f 6) <1.6; in, f 1 is the focal length of the first lens, f 2 is the focal length of the second lens, f 3 is the focal length of the third lens, f 4 is the focal length of the fourth lens, f 5 is the focal length of the fifth lens, f 6 is the focal length of the sixth lens.

[0009] Optionally, the optical power of the first lens, the second lens and the fourth lens is positive; The optical power of the third lens, the fifth lens and the sixth lens is negative.

[0010] Optionally, the total focal length of the imaging lens is f , and the focal length of each lens in the imaging lens is equal to the total focal length of the imaging lens (3) f The following relationship is satisfied: f 1 / f >2.6; 0.9< f 2 / f <1.1; -0.95< f 3 / f <-0.45; 0.62< f 4 / f <0.69; -7.2 < f 5 / f < -2; -1.7 < f 6 / f < 9.4.

[0011] Optionally, the total focal length of the imaging lens is f and the curvature of the two surfaces of each lens in the imaging lens and the total focal length of the imaging lens (3) f satisfy the following relationship: The ratio of the sum of the curvatures K1 and K2 of the two surfaces of the first lens to the total focal length of the imaging lens (3) f is -0.1 < (K1 + K2) / f < 0.1; The ratio of the sum of the curvatures K3 and K4 of the two surfaces of the second lens to the total focal length of the imaging lens (3) f is -0.1 < (K3 + K4) / f < 0; The ratio of the sum of the curvatures K5 and K6 of the two surfaces of the third lens to the total focal length of the imaging lens (3) f is -0.1 < (K5 + K6) / f < -0.05; The ratio of the sum of the curvatures K7 and K8 of the two surfaces of the fourth lens to the total focal length of the imaging lens (3) f is -0.22 < (K7 + K8) / f < 0; The ratio of the sum of the curvatures K9 and K 10 to the total focal length of the imaging lens (3) f is 0 < (K9 + K 10 ) / f < 0.05; The ratio of the sum of the curvatures K 11 and K 12 to the total focal length of the imaging lens (3) f is 0.2 < (K 11 + K 12 ) / f < 0.28.

[0012] Optionally, the first lens to the sixth lens in the imaging lens are all aspherical lenses.

[0013] Optionally, the aperture is a front aperture, the exit pupil distance H of the AR optical engine module is 0 < H < 3 mm, and the size pupil of the aperture is 2 mm < pupil < 5 mm.

[0014] Optionally, the image height D of the LCOS panel is ≤8 mm, and the pixel size of the LCOS panel satisfies: pixel ≥ 2.5 μm.

[0015] Optionally, the total optical length L of the AR optical machine module is ≤10.8 mm, and the FOV of the AR optical machine is ≥70°.

[0016] Optionally, the light source includes a natural light LED light source or a polarized light laser light source.

[0017] In a second aspect, an embodiment of the present application provides an AR glasses. The AR glasses include: shell; The AR optical machine module as described in the first aspect; and The optical waveguide device comprises a light coupling-in element and a light coupling-out element, wherein the light coupling-in element is located on the light output path of the aperture.

[0018] In a third aspect, an embodiment of the present application provides an AR display system. The AR display system includes the AR glasses as described in the second aspect.

[0019] In a fourth aspect, an embodiment of the present application provides an AR display method, which uses the AR optical machine module described in the first aspect to perform imaging, and the display method includes: The illumination light provided by the light source is S-polarized light; The illumination light is coupled into the illumination waveguide from an entrance pupil region, and coupled out from an exit pupil region of the illumination waveguide to an imaging lens; The illumination light is geometrically magnified by the imaging lens and then projected onto the LCOS panel; After the illumination light is emitted from the LCOS panel, it is phase modulated into P-line polarized light and forms imaging light; The imaging light is magnified by the imaging lens and then emitted from the exit pupil area to the aperture; The imaging light is emitted through the aperture to an external optical waveguide device to achieve projection imaging.

[0020] The beneficial effects of this application are: The AR optical machine module provided in the embodiment of the present application improves the integration of the AR optical machine module by adopting a specific optical architecture design, especially a design in which the illumination light and the imaging light share the same optical path, which is conducive to the miniaturization and lightweight of the AR optical machine module; the introduced illumination waveguide effectively connects the illumination light and the imaging light, simplifies the optical path and reduces light loss, thereby improving the utilization rate of light energy.

[0021] The AR optical machine module effectively controls the polarization state of light through polarization control components such as polarization splitter films set at the exit pupil, reducing stray light and reflected light, which can improve image clarity and contrast; at the same time, the optical design of the AR optical machine module is also conducive to achieving a large field of view (FOV), providing users with a wider field of view and enhancing the immersiveness of the AR experience.

[0022] In addition, the setting of the aperture makes the exit pupil size of the AR optical machine module controllable, enhancing the adaptability of the AR optical machine module and the external optical waveguide device, ensuring that the imaging light can be matched with the external optical waveguide device, so as to be efficiently projected to the user's eyes, further optimizing the visual experience.

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

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

[0025] Figure 1 A schematic diagram of the structure of an AR optical machine module provided in an embodiment of the present application; Figure 2 A schematic diagram of an AR optical machine module provided in an embodiment of the present application and an optical waveguide device provided in combination with an external device; Figure 3 One of the partial optical architecture diagrams of the AR optical machine module provided in the embodiment of the present application; Figure 4 for Figure 3 Optical distortion diagram of the provided AR optical machine module; Figure 5 for Figure 3 The MTF diagram of the AR optical module provided; Figure 6 for Figure 3 The vertical axis chromatic aberration diagram of the AR optical machine module provided; Figure 7 The second partial optical architecture diagram of the AR optical machine module provided in the embodiment of the present application; Figure 8 for Figure 7 Optical distortion diagram of the provided AR optical machine module; Fig. 9 for Figure 7 The MTF diagram of the AR optical module provided; Fig.10 for Figure 7 The vertical axis chromatic aberration diagram of the AR optical machine module provided.

[0026] Description of reference numerals: 1. Light source; 100. Illumination light; 2. Illumination waveguide; 21. Entrance pupil area; 22. Exit pupil area; 3. Imaging lens; 31. First lens; 32. Second lens; 33. Third lens; 34. Fourth lens; 35. Fifth lens; 36. Sixth lens; 300. Imaging light; 4. LCOS panel; 5. Aperture; 6. Polarization control components 61. Polarization splitter film; 62. Polarizer; 01. Optical waveguide device; 011. Optical in-coupling element; 012. Optical out-coupling element. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0029] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0030] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0031] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] The AR optical machine module, AR glasses, AR display system and AR display method provided in the embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0033] According to an embodiment of the present application, an AR optical machine module is provided. Figure 1The AR optical machine module includes a light source 1, an illumination waveguide 2, an imaging lens 3, an LCOS panel 4, an aperture 5 and a polarization control component 6; wherein the light source is used to provide an illumination light 100; the illumination waveguide 2 has an entrance pupil area 21 and an exit pupil area 22, the illumination light 100 is coupled in from the entrance pupil area 21, and coupled out from the exit pupil area 22; the imaging lens 3 is used to geometrically amplify the illumination light 100 coupled out from the exit pupil area 22; the LCOS panel 4 is used to phase modulate the illumination light 100 amplified by the imaging lens 3, and form an imaging light 300, and the imaging light 300 is then projected to the exit pupil area 22 through the imaging lens 3 and then emitted; the aperture 5 is arranged on the imaging light path emitted from the exit pupil area 22, and is used to adjust the exit pupil size; the polarization control component 6 includes a polarization splitter film 61, the polarization splitter film 61 is located between the exit pupil area 22 and the aperture 5, and is used to reflect S-line polarization and transmit P-line polarization.

[0034] The AR optical machine module provided in the embodiment of the present application includes a light source 1. The light source 1 is used as the light source of the entire AR optical machine module and is mainly used to provide illumination light 100. The light source 1 can be a natural light LED light source or a polarized light laser light source, depending on the application scenario and performance requirements.

[0035] The AR optical machine module provided in the embodiment of the present application includes an illumination waveguide 2. The illumination waveguide 2 has an entrance pupil area 21 and an exit pupil area 22. Figure 1 The illumination light 100 provided by the light source 1 is coupled into the entrance pupil area 21, propagates through total reflection inside the illumination waveguide 2, and is coupled out from the exit pupil area 22. The design of the illumination waveguide 2 allows the illumination light 100 and the imaging light 300 to share the same optical path, thereby simplifying the optical path structure and improving the integration of the optical architecture.

[0036] The AR optical machine module provided in the embodiment of the present application includes an imaging lens 3. The imaging lens 3 is located on one side of the exit pupil area 22 of the illumination waveguide 2, and is used to geometrically magnify the illumination light 100 coupled out from the exit pupil area 22. The design of the imaging lens 3 needs to ensure that the light can be clearly projected to the user's eyes after being magnified to form a high-quality image.

[0037] The AR optical machine module provided in the embodiment of the present application includes an LCOS panel 4. The LCOS panel 4 is used as a light modulator to perform phase modulation on the illumination light 100 amplified by the imaging lens 3 (to convert S-line polarization into P-line polarization). The LCOS panel 4 achieves pixel-level modulation imaging by changing the phase of the light to form imaging light 300.

[0038] The AR optical machine module provided in the embodiment of the present application includes an aperture 5. The aperture 5 is arranged on the imaging light path emitted from the exit pupil area 22, and can be used to adjust the exit pupil size of the AR optical machine module. The flexible setting of the aperture 5 enables the AR optical machine module to adapt to different application scenarios and user needs, ensuring that the imaging light can be efficiently projected to the user's eyes.

[0039] The AR optical machine module provided in the embodiment of the present application includes a polarization control component 6, which includes a polarization splitter film 61, and the polarization splitter film 61 is located between the exit pupil area 22 of the illumination waveguide 2 and the aperture 5. The function of the polarization splitter film 61 is, for example, to reflect S-line polarization and transmit P-line polarization. This design effectively controls the polarization state of light, reduces the impact of stray light and reflected light on imaging quality, and improves the clarity and contrast of the image.

[0040] See also Figure 2 , the AR optical machine module provided in the embodiment of the present application, its emitted imaging light 300, that is, the imaging light 300 emitted through the aperture 5, will be transmitted through an optical waveguide device 01. Specifically, this optical waveguide device 01 has an optical coupling element 011 and an optical coupling element 012, which is responsible for efficiently and accurately transmitting the imaging light 300 emitted through the aperture 5 at the exit pupil of the AR optical machine module to the user's eyes, thereby ensuring that the user can clearly see the presented image. This design not only optimizes the transmission path of the light, but also greatly improves the user's visual experience.

[0041] It should be noted that see Figure 1 and Figure 2 The AR optical machine module provided in the embodiment of the present application includes an illumination waveguide 2, and the introduction of the illumination waveguide 2 enables the illumination light 100 and the imaging light 300 to share the same optical path. The illumination waveguide 2 is not a waveguide for transmitting the imaging light to the human eye in a traditional optical machine system.

[0042] The AR optical machine module provided in the embodiment of the present application is shown in Figure 1 and Figure 2 The working process is as follows: Illumination process: the illumination light 100 emitted by the light source 1 is projected onto the entrance pupil area 21 of the illumination waveguide 2 , and after being totally reflected inside the illumination waveguide 2 , is coupled out from the exit pupil area 22 .

[0043] Imaging process: The illumination light 100 coupled out from the exit pupil area 22 of the illumination waveguide 2 is geometrically magnified by the imaging lens 3 and then projected onto the LCOS panel 4. The LCOS panel 4 can phase modulate the light (for example, converting the S-line polarized light into the P-line polarized light) to form an imaging light 300. The imaging light 300 is reflected, magnified and adjusted by the imaging lens 3, and then projected onto the exit pupil area 22.

[0044] Polarization control: When the imaging light 300 is projected onto the exit pupil region 22 of the illumination waveguide 2 , the polarization splitter film 61 reflects the S-line polarized light and transmits the P-line polarized light, ensuring that only the light that meets the polarization requirements can continue to propagate.

[0045] Exit pupil adjustment: Finally, the imaging light 300 is adjusted by the aperture 5 and then emitted to the external optical waveguide device 01 (used to transmit the imaging light to the target position such as the human eye). Figure 2 , forming the final imaging effect. The setting of the aperture 5 can adjust the exit pupil size according to actual needs to ensure that the imaging light can be efficiently projected to the user's eyes.

[0046] The polarization beam splitting film 61 (PBS film) may be supported between the exit pupil area 22 of the illumination waveguide 2 and the aperture 5 by a light-transmitting flat plate. The size of the polarization beam splitting film 61 may match that of the exit pupil area 22 .

[0047] The optical propagation path of the AR optical machine module provided in the embodiment of the present application is as follows: Figure 1 : The light source 1 emits an illumination light 100 (S-polarized light) → the illumination light (S-polarized light) enters the entrance pupil area 21 of the illumination waveguide 2 → the illumination light (S-polarized light) is emitted from the exit pupil area 22 of the illumination waveguide 2, and the illumination spot is shaped and matched to the LCOS panel 4 through the imaging lens 3 → the illumination light (S-polarized light) is incident and emitted through the LCOS panel 4 and becomes an imaging light 300 (P-polarized light) → the imaging light 300 (P-polarized light) is amplified and imaged through the imaging lens 3 → the imaging light 300 (P-polarized light) is emitted through the exit pupil area 22 and the aperture 5 in sequence.

[0048] The AR optical machine module provided in the embodiment of the present application has the characteristics of high integration. Figure 1 The design that the illumination light 100 and the imaging light 300 share the same optical path significantly improves the integration of the AR optical machine module and reduces the complexity and volume of the optical architecture. Specifically: First, the illumination light 100 and the imaging light 300 share a common optical path, which means that the illumination part and the imaging part can share some optical elements, such as the illumination waveguide 2, the imaging lens 3 and other optical elements, thereby reducing the number of optical elements. This design significantly improves the integration of the AR optical machine module.

[0049] Secondly, by sharing the optical path, the illumination and imaging optical paths can be combined into one main line, avoiding the complexity of separating the illumination and imaging optical paths in traditional designs and simplifying the overall optical architecture.

[0050] Furthermore, since the illumination light 100 and the imaging light 300 share the same optical path, the layout of the entire optical system is more compact, reducing the volume of the AR optical module. This is particularly important for devices such as AR glasses that have extremely high requirements on volume and weight.

[0051] In traditional designs, the lighting part and the imaging part usually require independent spatial layouts. However, the shared optical path design in this application can significantly reduce space occupancy, making the optical machine module thinner and lighter.

[0052] In traditional designs, the illumination optical path and the imaging optical path need to be aligned separately, which increases the difficulty of optical debugging. The shared optical path design makes optical path alignment simpler and reduces the complexity of the optical system.

[0053] In addition, since the illumination light 100 and the imaging light 300 share a common optical path, the entire AR optical machine module only needs to perform aberration correction on one optical path, reducing the difficulty and cost of aberration correction.

[0054] In the AR optical machine module provided in the embodiment of the present application, the material of the illumination waveguide 2 needs to have high light transmittance and low scattering properties to reduce light loss in the optical path and ensure the transmission efficiency of the illumination light 100 and the imaging light 300.

[0055] In the AR optical machine module provided in the embodiment of the present application, the LCOS panel 4 performs phase modulation on the S-line polarization and converts it into P-line polarization, thereby realizing the formation of the imaging light 300. This design enables the illumination light 100 and the imaging light 300 to be efficiently converted in a common optical path.

[0056] In the AR optical machine module provided in the embodiment of the present application, the polarization beam splitting film 61 (PBS film) is used to reflect S-line polarized light and transmit P-line polarized light. This polarization control design ensures efficient transmission and separation of the illumination light 100 and the imaging light 300 in the common optical path.

[0057] The AR optical machine module design provided in the embodiment of the present application has a simple and compact optical architecture, which is conducive to miniaturization of the optical machine. By optimizing the design of the optical system and the layout of the optical components, it is also beneficial to achieve an imaging effect with an increased field of view angle, thereby providing users with a wider field of view and enhancing the immersiveness of the AR visual experience. The introduction of the polarization control component 6 effectively controls the polarization state of the light, reduces the impact of stray light and reflected light on the imaging quality, and improves the clarity and contrast of the image. The flexible setting of the aperture 5 enables the AR optical machine module to adapt to different application scenarios and user needs, improving the adaptability and flexibility of the module.

[0058] In some examples of the present application, the image height of the LCOS panel 4 is D, the total optical length of the AR optical machine module is L, and the ratio D / L between the two satisfies: 0.6<D / L<0.8.

[0059] In the design of AR optical module, the image height D of the LCOS panel directly determines the size of the image, while the total optical length L reflects the size of the entire AR optical module in the direction of the optical axis. The D / L ratio requirement proposed in the embodiment of the present application is 0.6<D / L<0.8, which is an important design constraint aimed at optimizing the balance between the performance and volume of the AR optical module.

[0060] By constraining the D / L ratio to between 0.6 and 0.8, the total optical length L of the AR optical machine module of the present application can be effectively controlled while ensuring a certain imaging screen size (i.e., image height D). This means that the AR optical machine module can provide a sufficiently large field of view and an imaging screen with better visual effects while maintaining a small volume, thereby achieving a good balance between miniaturization and high performance.

[0061] The smaller total optical length helps to achieve the miniaturization and lightness of AR optical modules, which can also achieve the miniaturization and lightness of wearable devices such as AR glasses, making users more comfortable to wear and less likely to feel tired after long-term use. At the same time, sufficient imaging screen size ensures that users can clearly see AR content, enhancing the immersion and realism of the visual experience.

[0062] The limitation of the D / L ratio provides clear guidance for optical design. Optical designers can further improve the optical performance of the optical machine module by optimizing the lens material, curvature, thickness and other parameters while meeting this ratio requirement, such as reducing distortion, increasing MTF value and reducing chromatic aberration.

[0063] Furthermore, the image height of the LCOS panel 4 is D, the total optical length of the AR optical module is L, and the ratio D / L between the two satisfies: 0.6<D / L<0.7. This constraint is intended to further optimize the balance between the performance and volume of the AR optical module to meet higher standards.

[0064] When D / L is less than 0.6, the image will be too small. A smaller D / L ratio means that at the same total optical length, the image height of the LCOS panel 4 is smaller, resulting in an image size that is too small. This may affect the user's visual perception of AR content, especially in scenes where a large amount of information or complex graphics need to be displayed, where a too small image may not provide sufficient detail and clarity. In addition, in order to achieve sufficient field of view and imaging quality at a smaller image height, the optical design may require a more complex lens combination and more advanced optical materials, thereby increasing the design difficulty and manufacturing cost.

[0065] When D / L is greater than 0.7 (including greater than 0.8), the AR optical machine module will be larger. This is because a larger D / L ratio means that the total optical length is larger at the same image height, which results in the AR optical machine module being too large. This may affect the portability and comfort of wearable devices, especially in scenarios where they need to be worn for a long time. In addition, although a larger image height helps provide a larger imaging screen, an excessively large total optical length may also lead to increased aberrations and distortions in the optical system, thereby affecting the imaging quality. Especially at the edge of the field of view, significant image distortion and blurring may occur.

[0066] It can be seen that by limiting the ratio of the image height of the LCOS panel 4 to the total optical length L of the AR optical machine module within the range of 0.6<D / L<0.8, the volume and weight of the AR optical machine module can be effectively controlled while ensuring a certain imaging screen size, thereby achieving a good balance between miniaturization and high performance.

[0067] In some examples of this application, see Figure 1 The polarization control component also includes a polarizer 62, which is arranged on the optical path between the light source 1 and the entrance pupil area 21, and is used to analyze the illumination light 100 provided by the light source 1, and only allows S-line polarized light to pass through the entrance pupil area 21 and enter the interior of the illumination waveguide 2.

[0068] In this example of the present application, see Figure 1The polarization control component 6 includes not only a polarization beam splitter film 61, but also a polarizer 62 (POL). The polarizer 62 is arranged on the optical path between the light source 1 and the entrance pupil area 21 of the illumination waveguide 2. Its main function is to analyze the illumination light 100 provided by the light source 1, and only allow S-line polarized light to pass through the entrance pupil area 21 and enter the interior of the illumination waveguide 2.

[0069] For example, the polarizer 62 may be mounted on the entrance pupil area 21 .

[0070] Of course, the polarizer 62 may also be disposed on the light emitting surface of the light source 1 .

[0071] The polarizer 62, as a part of the polarization control assembly 6, can effectively filter out non-S-line polarized light components, ensuring that only high-purity S-line polarized light enters and propagates inside the illumination waveguide 2. This helps to improve the polarization efficiency and imaging quality of the subsequent optical system, and reduces the interference of stray light and reflected light caused by impure polarization on the imaging quality.

[0072] By strictly controlling the polarization state of the light entering the illumination waveguide 2, the polarizer 62 helps to reduce the fluctuation of the optical system performance caused by the change of the polarization state of the light, which can enhance the stability and reliability of the AR optical machine module under different environments and usage conditions.

[0073] Only S-line polarized light is allowed to pass through the entrance pupil area 21 and enter the illumination waveguide 2, which means that the energy in the illumination light 100 is more concentratedly used in the imaging process, reducing energy waste caused by polarization loss. This helps to improve the illumination efficiency of the AR optical machine module and reduce power consumption.

[0074] The polarizer 62 ensures that the polarization state of the illumination light 100 matches the polarization requirements of the subsequent optical system such as the LCOS panel 4 and the polarization splitter film 61, thereby helping to reduce undesirable phenomena such as ghosting and glare during the imaging process. This can improve the user's visual experience and enhance the realism and immersion of the AR display content.

[0075] The polarizer 62 added in this example of the present application plays an important role in the AR optical machine module. It provides the AR optical machine module with better performance and broader application prospects by improving the polarization purity of light, enhancing the optical stability of the module, optimizing lighting efficiency and improving visual experience.

[0076] In some examples of this application, see Figure 2 and Figure 6, the imaging lens 3 includes a first lens 31, a second lens 32, a third lens 33, a fourth lens 34, a fifth lens 35 and a sixth lens 36 arranged in sequence along the same optical axis; wherein the first lens 31 is located on a side close to the illumination waveguide 2, the sixth lens 36 is located on a side close to the LCOS panel 4, and the imaging lens 3 satisfies the following relationship: -0.3<( f 1+ f 2+ f 4) / ( f 3+ f 5+ f 6) <1.6; in, f 1 is the focal length of the first lens 31, f 2 is the focal length of the second lens 32, f 3 is the focal length of the third lens 33, f 4 is the focal length of the fourth lens 34, f 5 is the focal length of the fifth lens 35, f 6 is the focal length of the sixth lens 36.

[0077] In this example of the present application, see Figure 2 and Figure 6 , the imaging lens 3 includes six lenses.

[0078] Of course, in other examples of the present application, the number of lenses included in the imaging lens 3 can be adjusted as needed and is not limited to the six lenses in the example.

[0079] Image quality can be improved by adjusting the number of lenses in the imaging lens.

[0080] By controlling the proportional relationship between the focal lengths of the six lenses, the aberrations in the imaging lens 3 can be effectively balanced. In particular, the reasonable combination of positive and negative optical power lenses (such as the first lens 31, the second lens 32 and the fourth lens 34 have positive optical power, and the third lens 33, the fifth lens 35 and the sixth lens 36 have negative optical power) can significantly reduce chromatic aberration, thereby improving imaging quality.

[0081] The optimized focal length relationship helps ensure that the imaging lens 3 can provide clear imaging at different field angles. This can not only improve the resolution of AR display content, but also reduce blur and distortion at the edge of the image, thereby improving the user's visual experience.

[0082] The lens combination that satisfies the above focal length relationship can achieve a more compact optical design while ensuring image quality. This is crucial for the miniaturization of AR optical modules and helps improve the portability and comfort of wearable devices.

[0083] For some examples in this application, please continue to see Figure 2 and Figure 6 , the optical power of the first lens 31, the second lens 32 and the fourth lens 34 is positive; the optical power of the third lens 33, the fifth lens 35 and the sixth lens 36 is negative.

[0084] In the example of the present application, the imaging lens 3 may be composed of six lenses, wherein the optical power of the first lens 31, the second lens 32 and the fourth lens 34 is set to be positive, and the optical power of the third lens 33, the fifth lens 35 and the sixth lens 36 is set to be negative. The above different lenses use different materials, and the combination of positive and negative optical power is conducive to reducing imaging chromatic aberration.

[0085] The alternating use of positive and negative power lenses can effectively correct the aberrations in AR optical modules. Positive power lenses have the function of converging light, while negative power lenses have the function of diverging light. By properly matching these two types of lenses, the convergence and divergence trends of light during the imaging process can be balanced, thereby reducing aberrations such as spherical aberration and chromatic aberration, and improving imaging quality.

[0086] Since the chromatic aberration is effectively corrected, the imaging lens 3 can provide better quality imaging at a wider field of view, which is crucial for AR display applications, because AR devices usually need to provide a larger field of view to enhance the user's immersion.

[0087] In general, the focal length of the imaging lens 3 needs to be optimized to ensure that the illumination light 100 and the imaging light 300 can be correctly amplified and focused in the common optical path. For example, the focal length distribution (positive and negative focal length matching) of the six lenses mentioned in this example of the present application is to correct aberrations and optimize the optical path.

[0088] In some examples of the present application, the total focal length of the imaging lens 3 is f , and the focal length of each lens in the imaging lens 3 is equal to the total focal length of the imaging lens 3 f The following relationship is satisfied: f 1 / f >2.6; 0.9< f 2 / f <1.1; -0.95< f 3 / f <-0.45; 0.62< f 4 / f <0.69; -7.2<f 5 / f <-2; -1.7< f 6 / f <9.4.

[0089] These constraints in this example of the present application have a significant impact on the optical performance, production assembly, and miniaturization design of the imaging lens 3. Specifically: (1) The focal power of each lens in the imaging lens 3 is evenly distributed: These constraints in this example of the present application ensure that the power distribution of the six lenses in the imaging lens 3 is relatively uniform. The light correction capability of each lens is roughly equivalent, which helps to improve the lens tolerance sensitivity of the optical machine design. In optical design, lens tolerance sensitivity is an important indicator, which reflects the degree of influence of lens manufacturing errors on the overall performance of the system. By reasonably allocating the power of each lens, the impact of manufacturing errors on imaging quality can be reduced, thereby improving production efficiency and yield rate.

[0090] (2) It is conducive to miniaturization of AR optical machine modules: Under the premise of satisfying the imaging quality, these constraints in this example of the present application also help to realize the miniaturization design of the AR optical machine module. By optimizing the focal length and optical power distribution of the six lenses in the imaging lens 3, the total volume and weight of the AR optical machine module can be reduced while ensuring the imaging performance. This is of great significance for improving the portability and user experience of AR devices.

[0091] In this example of the present application, the focal length of each lens in the imaging lens 3 is equal to the total focal length of the imaging lens 3. f By rationally allocating the focal length of each lens, the constraints between them are used to achieve uniform focal length distribution, improve lens tolerance sensitivity, and facilitate the miniaturization of AR optical machines. These constraints in this example of the present application not only reflect the optimization of the optical performance of the imaging lens, but also provide design ideas for the miniaturization and high-performance design of AR optical machine modules.

[0092] In some examples of the present application, the total focal length of the imaging lens 3 is f , and the curvature of the two surfaces of each lens in the imaging lens 3 is equal to the total focal length of the imaging lens 3 f The following relationship is satisfied: The sum of the two surface curvatures K1 and K2 of the first lens 31 and the total focal length of the imaging lens 3 f The ratio is -0.1<(K1+K2) / f <0.1; The sum of the two surface curvatures K3 and K4 of the second lens 32 and the total focal length of the imaging lens 3 f The ratio is -0.1<(K3+K4) / f <0; The sum of the two surface curvatures K5 and K6 of the third lens 33 and the total focal length of the imaging lens 3 f The ratio is -0.1<(K5+K6) / f <-0.05; The sum of the two surface curvatures K7 and K8 of the fourth lens 34 and the total focal length of the imaging lens 3 f The ratio is -0.22<(K7+K8) / f <0; The two surface curvatures K9 and K 10 The sum of the total focal length f The ratio is 0<(K9+K 10 ) / f <0.05; The two surface curvatures K of the sixth lens 36 11 and K 12 The sum of the total focal length f The ratio is 0.2<(K 11 +K 12 ) / f<0.28.

[0093] In this example of the present application, these constraints have a positive impact on the optical performance, production assembly, and miniaturized design of the imaging lens 3.

[0094] Specifically, these constraints in this example of the present application ensure that the surface distribution of each lens in the imaging lens 3 is relatively uniform. The sum of the curvatures of the two surfaces of each lens and the total focal length f The ratio of is constrained within a reasonable range, making the position and role of each lens in the optical path more balanced. This balanced distribution helps each lens to assume a considerable aberration correction capability, thereby improving the optical performance of the entire imaging system.

[0095] The uniform distribution of the surface shape of each lens also helps to improve the lens tolerance sensitivity of the AR optical module design. In optical design, lens tolerance sensitivity is an important indicator that reflects the degree of influence of lens manufacturing errors on the overall performance of the AR optical module. By optimizing the surface shape distribution of each lens, the influence of manufacturing errors on imaging quality can be reduced, thereby improving production efficiency and yield rate.

[0096] Since the surface profiles of each lens are evenly distributed and have considerable aberration correction capabilities, the assembly relationship between the lenses is also clearer and more stable. This helps to simplify the production and assembly process and improve assembly efficiency. At the same time, the stable assembly relationship also helps to reduce errors in the assembly process and further improve the image quality.

[0097] The curvature of each lens in the imaging lens 3 is designed according to this constraint, which is also conducive to the processing and manufacturing of the lens. Reasonable curvature distribution can reduce the processing difficulty and cost and improve the yield rate of the lens. In addition, this curvature constraint also helps to reduce the thickness of each lens, thereby achieving a miniaturized design of the AR optical machine while achieving high-performance imaging. This is of great significance for improving the portability and user experience of AR devices.

[0098] It should be noted that in the imaging lens 3, the curvature of each lens surface is clearly defined. Taking the first lens 31 as an example, the curvature of the first surface is recorded as K1, and the curvature of the second surface is recorded as K2. Figure 2 and Figure 6 , wherein the first surface is the left surface of the first lens 31, and the second surface is the right surface of the first lens 31. Similarly, the surface curvatures of other lenses also follow the same naming rules.

[0099] In some examples of the present application, the first lens 31 to the sixth lens 36 in the imaging lens 3 are all aspherical lenses.

[0100] The imaging lens 3 has positive focal power, for example, it may include 6 lenses, and all lenses are set as aspherical lenses. This design choice has significant technical effects, which are mainly reflected in the following aspects: (1) Compared with traditional spherical lenses, aspherical lenses have more advantages in optical performance, can better correct aberrations and improve image quality. However, the processing difficulty of aspherical lenses is relatively high. By using molds for production and processing, the manufacturing efficiency and consistency of aspherical lenses can be greatly improved, which is conducive to mass production. This is of great significance for reducing production costs and improving production efficiency.

[0101] Mass production can not only reduce the cost of a single lens, but also improve the production efficiency of the entire imaging lens 3 and even the AR optical machine.

[0102] (2) In the AR optical machine module of the present application, the imaging lens 3 adopts an aspherical lens design, which can achieve a large FOV target by using only 6 lenses while ensuring the imaging quality. For example, the FOV of the AR optical machine module can reach 70° or even larger. This greatly reduces the number of lenses and the complexity of the optical machine structure while achieving a large FOV, thereby helping to reduce costs.

[0103] Reducing the number of lenses means reducing material costs, processing costs, and assembly costs. At the same time, a simpler opto-mechanical structure also helps improve production efficiency and yield, further reducing production costs.

[0104] (3) The design of aspherical lenses can more precisely control the path and focus of light, thereby reducing the thickness of the lenses while ensuring imaging quality. This is of great significance for achieving the miniaturized design of the AR opto-mechanical unit. Using aspherical lenses can also optimize the internal structure layout of the opto-mechanical unit, making the entire opto-mechanical unit more compact and lightweight. This is of great significance for enhancing the portability and user experience of AR devices.

[0105] In some examples of this application, referring to Figure 1 , the aperture stop 5 is a front aperture stop, the exit pupil distance H of the AR opto-mechanical unit module satisfies 0 < H < 3 mm, and the size pupil of the aperture stop 5 satisfies 2 mm < pupil < 5 mm.

[0106] The aperture stop 5 is a front aperture stop.

[0107] Specifically, referring to Figure 1 , the aperture stop 5 is located at the very front end of the entire AR opto-mechanical unit module, that is, in front of the illumination waveguide 2 and the polarization beam splitter film 61.

[0108] The exit pupil distance H satisfies 0 < H < 3 mm, which is the distance limit from the aperture stop 5 to the first surface of the AR opto-mechanical unit module (this first surface is the surface of the illumination waveguide 2 close to the aperture stop 5).

[0109] The size pupil of the aperture stop 5 satisfies 2 mm < pupil < 5 mm: This is the limit on the aperture size of the aperture stop.

[0110] The exit pupil distance H of the opto-mechanical unit module in this example of this application matches the entrance pupil of the external optical waveguide device 01 (i.e., the size of the optical coupling element 011).

[0111] Due to the front design of the aperture stop 5 and the limitation of the exit pupil distance H of the opto-mechanical unit, the exit pupil of the AR opto-mechanical unit module provided in this application can be well matched with the entrance pupil of conventional optical waveguide devices in the industry. This matching is crucial for ensuring that light can be efficiently coupled into the optical waveguide device and transmitted in the optical waveguide device. For the optical waveguide device here, please refer to Figure 1 the optical waveguide device 01 shown on the left in, which has a different function from the illumination waveguide 2 included in the AR opto-mechanical unit module of this application.

[0112] The size limitation of the aperture 5 ensures that the light will not be too divergent or concentrated when passing through the aperture 5, thereby improving the coupling efficiency between the light and the external optical waveguide. This helps to reduce light loss and improve the efficiency of the overall AR optical machine module.

[0113] The limitation of the pupil distance H provides sufficient space for the assembly between the AR optical machine module and the optical waveguide device of the peripheral. This helps to reduce the difficulty of assembly, improve assembly accuracy and ensure stability after assembly.

[0114] By limiting the constraints in this example of the present application, efficient coupling and stable transmission between the AR optical machine module and the external optical waveguide device 01 are ensured, which provides the basic conditions for achieving high-quality optical display.

[0115] In some examples of the present application, the image height D of the LCOS panel 4 is ≤8 mm, and the pixel size of the LCOS panel 4 satisfies: pixel ≥2.5 μm.

[0116] The image height D of the LCOS panel 4 is ≤ 8 mm: this is a limitation on the height of the imaging area of ​​the LCOS panel 4 .

[0117] The pixel size of LCOS panel 4 is pixel ≥ 2.5 μm: This is the minimum limit on the size of a single pixel on the LCOS panel, ensuring that each pixel has sufficient size to meet display and imaging requirements.

[0118] By limiting the image height of the LCOS panel 4 to within 8mm, it helps to achieve the miniaturization design of the AR optical machine module. This is crucial to improving the portability and comfort of AR devices, especially in the field of wearable devices. At the same time, ensuring that the pixel size is not less than 2.5μm can achieve a higher pixel density while ensuring the display quality, thereby providing a clear and delicate image display. This helps to enhance the user's visual experience, especially in application scenarios that require high-resolution display.

[0119] By precisely controlling the image height and pixel size of the LCOS panel 4, a high-resolution LCOS panel 4 can be provided. Through the optical design provided in the present application, a good match between the high-resolution LCOS panel 4 and the entire optical system (including the imaging lens 3, the illumination waveguide 2, etc.) can be ensured. This helps to optimize the optical performance and improve the imaging quality. For example, in the present application, a high-resolution LCOS panel 4 and a precise imaging lens 3 design are used to ensure the high resolution and clarity of the imaging light 300.

[0120] In some examples of the present application, the total optical length L of the AR optical machine module is ≤10.8 mm, and the FOV of the AR optical machine is ≥70°.

[0121] The total optical length L of the AR optical module is ≤10.8mm, which is a limit on the overall length of the AR optical module, that is, the length of the entire optical architecture (including lenses, LCOS panels, lighting waveguides and other components) can not exceed 10.8mm. The FOV of the AR optical machine is ≥70°, which means that the range of virtual images that users can see through AR glasses should be no less than 70°.

[0122] By limiting the total optical length of the AR optical module to within 10.8mm, the miniaturization design of AR devices is achieved. This is crucial to improving the portability and comfort of AR devices, especially in the field of wearable devices. At the same time, ensuring that the field of view is not less than 70° provides users with a wide field of view, enhancing the sense of virtual and real integration and immersion. The wide viewing angle design allows users to obtain rich virtual information without frequently moving their heads, improving the user experience.

[0123] Achieving a field of view of more than 70° in such a compact optical space requires very high optical design technology. This application achieves this goal by using aspherical lenses, optimizing lens combinations and optical path design, reflecting the advanced nature of the technology.

[0124] In some examples of the present application, the light source 1 includes an LED light source of natural light or a laser light source of polarized light.

[0125] The natural light LED light source is a semiconductor light-emitting device that emits light by stimulating the electron transition in the semiconductor material through electric current. The natural light LED light source refers to a light source that emits a spectrum distribution close to that of nature. LED light sources have the advantages of high efficiency, long life, low power consumption, small size and light weight.

[0126] Polarized laser light source is a light source that produces coherent light through stimulated radiation, and the light it emits has a high degree of directionality and coherence. Polarized laser light source refers to a laser light source that emits light with a specific polarization state (such as S-line polarization or P-line polarization). Laser light sources have the advantages of high brightness, good monochromaticity, strong directionality, and good coherence.

[0127] By providing two different types of light sources (LED light source and laser light source), the AR optical machine module design of this application can adapt to a wider range of application scenarios and needs. For example, in applications that require high brightness and high contrast display, a laser light source can be selected; while in applications that have strict requirements on the volume, weight and power consumption of the light source, an LED light source can be selected.

[0128] Both LED and laser light sources can provide stable and uniform illumination for LCOS panels. Laser light sources can further enhance image contrast and clarity due to their high brightness and high coherence. LED light sources, on the other hand, help provide more realistic color reproduction through their light distribution close to the natural spectrum.

[0129] The application scope of the AR optical machine module provided in the embodiment of the present application includes: Wavelength range: Applicable to full-color AR LCOS optical machine in the visible light wavelength range.

[0130] Imaging lens matching parameters: the imaging lens 3 matching image height does not exceed 8mm, that is, it is suitable for 0~0.32 inch LCOS panel 4; the imaging lens 3 matching Nyquist frequency does not exceed 200lp / mm; LCOS panel 4 pixel size: the imaging lens 3 matches the LCOS panel 4 pixel size is not less than 2.5μm.

[0131] According to one embodiment of the present application, an AR glasses is provided. Figure 2 The AR glasses include: a housing, the AR optical machine module as described above, and an optical waveguide device 01; wherein the optical waveguide device 01 has an optical coupling element 011 and an optical coupling element 012, and the optical coupling element 011 is located on the light output path of the aperture 5.

[0132] In a specific example, the optical waveguide device 01 and the AR optical machine module can both be located in two positions, corresponding to the left eye and the right eye of the user respectively.

[0133] According to another embodiment of the present application, an AR display system is provided, and the AR display system includes the AR glasses as described above.

[0134] It should be noted that, in addition to the AR glasses themselves, the AR display system may also include key components or subsystems such as a processing unit, a sensor module, a power management module, a display controller, an input / output device, a communication module, an operating system, and application software. These components and subsystems work together to achieve high-quality augmented reality display effects and a rich user experience.

[0135] According to another embodiment of the present application, an AR display method is provided, which uses the above-mentioned AR optical machine module to perform imaging, see Figure 1 and Figure 2 , the display method comprises the following steps: The illumination light 100 provided by the light source 1 is S-polarized light; The illumination light 100 is coupled into the illumination waveguide 2 from the entrance pupil region 21 and coupled out from the exit pupil region 22 of the illumination waveguide 2 to the imaging lens 3; The illumination light 100 is geometrically magnified by the imaging lens 3 and then projected onto the LCOS panel 4; After the illumination light 100 is emitted from the LCOS panel 4, it is phase modulated into P-line polarized light and forms an imaging light 300; The imaging light 300 is magnified by the imaging lens 3 and then emitted from the exit pupil area 22 to the aperture 5; The imaging light 300 is emitted through the aperture 5 to the external optical waveguide device 01 to achieve projection imaging.

[0136] The AR display method provided in the embodiment of the present application uses the above-mentioned AR optical machine module to perform imaging, and its beneficial effects are mainly reflected in the following aspects: (1) The illumination light 100 is coupled in and out through the entrance pupil area 21 and the exit pupil area 22 of the illumination waveguide 2, which effectively improves the transmission efficiency of light energy and reduces light loss. The imaging lens 3 geometrically magnifies the illumination light 100 and projects it onto the LCOS panel 4, ensuring that the light can be evenly irradiated on the panel and improving the imaging quality.

[0137] (2) The illumination light 100 enters the illumination waveguide 2 and the imaging lens 3 as S-polarized light, and is phase-modulated into P-polarized light after passing through the LCOS panel 4. This process achieves precise control and conversion of polarized light, helps reduce light crosstalk and interference, and improves the contrast and clarity of the image.

[0138] (3) The optical architecture adopted by this display method is compact. By rationally designing the parameters of the imaging lens and illumination waveguide, the miniaturization of the optomechanical module is achieved, making it easier to use in portable devices such as AR glasses.

[0139] (4) This method is applicable to full-color AR LCOS optical machines in the visible light wavelength range and can match LCOS panels of various specifications, including panels with image height not exceeding 8 mm and Nyquist frequency not exceeding 200 lp / mm. It has strong versatility and adaptability.

[0140] (5) After two magnifications by the imaging lens 3 and the exit imaging of the aperture, the imaging light can form a clear and bright image, meeting the high requirements of AR display for imaging quality.

[0141] The display method adopts a common optical path design for illumination and imaging, which simplifies the structure of the optical system, reduces the manufacturing difficulty and cost, and improves the reliability and stability of the system.

[0142] The AR optical machine module of the present application is described below through Example 1 and Example 2 respectively.

[0143] Example 1 See also Figure 1 , the AR optical machine module includes a light source 1, an illumination waveguide 2, an imaging lens 3, an LCOS panel 4, an aperture 5 and a polarization control component 6; The light source 1 is used to provide illumination light 100; The illumination waveguide 2 has an entrance pupil area 21 and an exit pupil area 22, and the illumination light 100 is coupled into the entrance pupil area 21 and coupled out of the exit pupil area 22; The imaging lens 3 is used to geometrically magnify the illumination light 100 coupled out from the exit pupil area 22; see Figure 3 The imaging lens 3 includes a first lens 31, a second lens 32, a third lens 33, a fourth lens 34, a fifth lens 35 and a sixth lens 36 which are sequentially arranged along the same optical axis; wherein the first lens 31 is located on a side close to the illumination waveguide 2, and the sixth lens 36 is located on a side close to the LCOS panel 4; The LCOS panel 4 is used to perform phase modulation on the illumination light 100 amplified by the imaging lens 3 and form an imaging light 300. The imaging light 300 is then projected to the exit pupil area 22 by the imaging lens 3 and then emitted. The aperture 5 is arranged on the imaging light path emitted from the exit pupil area 22, and is used to adjust the exit pupil size; The polarization control component 6 includes a polarization splitter film 61 and a polarizer 62. The polarization splitter film 61 is located between the exit pupil area 22 and the aperture 5, and is used to reflect S-line polarized light and transmit P-line polarized light. The polarizer 62 is arranged on the optical path between the light source 1 and the entrance pupil area 21, and is used to analyze the illumination light 100 provided by the light source 1, and only allows S-line polarized light to pass through the entrance pupil area 21 and enter the interior of the illumination waveguide 2.

[0144] This embodiment 1 is based on a 1600*1600*3μm LCOS panel, and the FOV of the entire AR optical machine module is 70°; the pupil size of the aperture 5 is 2mm, and the F number is 2.7; the total focal length of the imaging lens 3 is 5.4mm; the total optical length of the AR optical machine module is 10.4mm (distance from the pupil surface to the image plane).

[0145] The specific parameters of the AR optical machine module provided in this embodiment 1 are shown in Table 1 below, which include the curvature radius, thickness, glass material, and semi-aperture of the lens.

[0146] Table 1

[0147] The AR optical machine module provided in this embodiment 1 is shown in Figure 4, its optical distortion diagram shows that its optical distortion rate is controlled within 10%. This optical performance fully meets the extremely high requirements of the human eye for imaging quality under a large field of view (FOV). Through the carefully designed optical architecture and imaging lens parameters, the AR optical machine module provided in this application ensures that the image can maintain a high degree of clarity and accuracy even in a wide field of view, bringing an immersive visual experience to users.

[0148] The AR optical machine module provided in this embodiment 1 is shown in Figure 5 The MTF (Modulation Transfer Function) graph shows good imaging performance, with the average MTF value of each field of view exceeding 0.47. At the Nyquist frequency of 167lp / mm, this result far exceeds the standard required for AR display. This excellent MTF performance ensures that the details of the image are fully preserved during the transmission process, making the image quality clear and sharp, perfectly meeting the high requirements of AR display.

[0149] The AR optical machine module provided in this embodiment 1 is shown in Figure 6 , the RGB vertical axis chromatic aberration is only <1.5 μm, which indicates that the imaging lens 3 has a very strong achromatic aberration capability.

[0150] Example 2 See also Figure 1 and Figure 7 The optical structure of the AR optical machine module provided in this embodiment 2 is the same as that of the above-mentioned embodiment 1, and will not be described again here. The total optical length of the AR optical machine module provided in this embodiment 2 is 10.8 mm.

[0151] It should be noted that Figure 7 The structure of the imaging lens portion in this embodiment 2 is shown.

[0152] The specific parameters of the AR optical machine module provided in this embodiment 2 are shown in Table 2 below, which include the curvature radius, thickness, glass material, and semi-aperture of the lens.

[0153] Table 2

[0154] The AR optical machine module provided in this embodiment 2 is shown in FIG. Figure 8 Its optical distortion diagram shows that its optical distortion rate is controlled within 10.1%. This optical performance fully meets the extremely high requirements of the human eye for imaging quality under a large field of view (FOV).

[0155] The AR optical machine module provided in this embodiment 2 is shown in FIG. Fig. 9 The MTF (modulation transfer function) graph shows excellent imaging performance, with the average MTF value for each field of view exceeding 0.41 at the Nyquist frequency of 167lp / mm, which far exceeds the standard required for AR display.

[0156] The AR optical machine module provided in this embodiment 2 is shown in FIG. Fig.10 , the RGB vertical axis chromatic aberration is only <2.3μm, and the achromatic aberration capability of the imaging lens 3 meets the AR imaging requirements.

[0157] The specific implementation methods of the AR glasses, AR display system and AR display method of the embodiments of the present application can refer to the various embodiments of the AR optical machine module mentioned above, and therefore have at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0158] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0159] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. An AR optical machine module, characterized in that: Comprising: A light source (1) for providing illumination light (100); An illumination waveguide (2) having an entrance pupil region (21) and an exit pupil region (22), wherein the illumination light (100) is coupled into the entrance pupil region (21) and coupled out from the exit pupil region (22); An imaging lens (3) for geometrically magnifying the illumination light (100) coupled out from the exit pupil region (22); An LCOS panel (4) for phase-modulating the illumination light (100) magnified by the imaging lens (3) and forming imaging light (300), and the imaging light (300) is then projected by the imaging lens (3) onto the exit pupil region (22) and exits; A diaphragm (5) disposed on the imaging light path exiting from the exit pupil region (22) for adjusting the exit pupil size; A polarization control component (6) including a polarization beam splitting film (61), the polarization beam splitting film (61) being located between the exit pupil region (22) and the diaphragm (5) for reflecting S-line polarized light and transmitting P-line polarized light.

2. The AR optical machine module according to claim 1, characterized in that: The image height of the LCOS panel (4) is D, the total optical length of the AR optical engine module is L, and the ratio D / L between the two satisfies: 0.6 < D / L < 0.

8.

3. The AR optical machine module according to claim 1, characterized in that: The polarization control component further includes a polarizer (62) disposed on the optical path between the light source (1) and the entrance pupil region (21) for analyzing the polarization of the illumination light (100) provided by the light source (1), and only allowing S-line polarized light to enter the interior of the illumination waveguide (2) through the entrance pupil region (21).

4. The AR optical machine module according to claim 1, characterized in that: The imaging lens (3) includes a first lens (31), a second lens (32), a third lens (33), a fourth lens (34), a fifth lens (35), and a sixth lens (36) sequentially arranged along the same optical axis; wherein, the first lens (31) is located on the side close to the illumination waveguide (2), the sixth lens (36) is located on the side close to the LCOS panel (4), and the imaging lens (3) satisfies the following relationship: -0.3<（ f 1+ f 2+ f 4） / （ f 3+ f 5+ f 6）<1.6； in, f 1 is the focal length of the first lens (31), f 2 is the focal length of the second lens (32), f 3 is the focal length of the third lens (33), f 4 is the focal length of the fourth lens (34), f 5 is the focal length of the fifth lens (35), f 6 is the focal length of the sixth lens (36).

5. The AR optical machine module according to claim 4, characterized in that: The optical powers of the first lens (31), the second lens (32), and the fourth lens (34) are positive; The optical powers of the third lens (33), the fifth lens (35), and the sixth lens (36) are negative.

6. The AR optical machine module according to claim 4, characterized in that: The total focal length of the imaging lens (3) is f , and the focal length of each lens in the imaging lens (3) is equal to the total focal length of the imaging lens (3) f The following relationship is satisfied: f 1 / f ＞2.6； 0.9＜ f 2 / f ＜1.1； -0.95＜ f 3 / f ＜-0.45； 0.62＜ f 4 / f ＜0.69； -7.2＜ f 5 / f ＜-2； -1.7＜ f 6 / f ＜9.4。 7. The AR optical machine module according to claim 4, characterized in that: The total focal length of the imaging lens (3) is f , and the curvature of the two surfaces of each lens in the imaging lens (3) is equal to the total focal length of the imaging lens (3). f The following relationship is satisfied: The sum of the two surface curvatures K1 and K2 of the first lens (31) and the total focal length of the imaging lens (3) f The ratio is -0.1<(K1+K2) / f <0.1; The sum of the two surface curvatures K3 and K4 of the second lens (32) and the total focal length of the imaging lens (3) f The ratio is -0.1<(K3+K4) / f <0; The sum of the two surface curvatures K5 and K6 of the third lens (33) and the total focal length of the imaging lens (3) f The ratio is -0.1<(K5+K6) / f <-0.05; The sum of the two surface curvatures K7 and K8 of the fourth lens (34) and the total focal length of the imaging lens (3) f The ratio is -0.22<(K7+K8) / f <0; The two surface curvatures K9 and K 10 The sum of the total focal length of the imaging lens (3) f The ratio is 0<(K9+K 10 ) / f <0.05; The two surface curvatures K of the sixth lens (36) are 11 and K 12 The sum of the total focal length of the imaging lens (3) f The ratio is 0.2<(K 11 +K 12 ) / f<0.

28.

8. The AR optical machine module according to any one of claims 4 to 7, characterized in that: All the first lens (31) to the sixth lens (36) in the imaging lens (3) are aspherical lenses.

9. The AR optical machine module according to claim 1, characterized in that: The diaphragm (5) is a front diaphragm, the exit pupil distance H of the AR optical engine module is 0 < H < 3 mm, and the size pupil of the diaphragm (5) is 2 mm < pupil < 5 mm.

10. The AR optical machine module according to claim 2, characterized in that: The image height D of the LCOS panel (4) is D ≤ 8 mm, and the pixel size of the LCOS panel (4) satisfies: pixel ≥ 2.5 μm.

11. The AR optical machine module according to claim 10, characterized in that: The total optical length L of the AR optical engine module is L ≤ 10.8 mm, and the FOV of the AR optical engine module is FOV ≥ 70°.

12. The AR optical machine module according to claim 1, characterized in that: The light source (1) includes an LED light source of natural light or a laser light source of polarized light.

13. An AR glasses, characterized in that: Comprising: A housing; The AR optical engine module according to any one of claims 1-12; And An optical waveguide device (01) comprises a light coupling-in element (011) and a light coupling-out element (012), wherein the light coupling-in element (011) is located on the light output path of the aperture (5).

14. An AR display system, characterized in that: Including the AR glasses described in claim 13.

15. An AR display method, characterized in that: Imaging is performed using the AR optical machine module according to any one of claims 1 to 12, wherein the display method comprises: The light source (1) provides an illumination light (100), wherein the illumination light (100) is S-polarized light; The illumination light (100) is coupled into the illumination waveguide (2) from an entrance pupil region (21), and is coupled out from an exit pupil region (22) of the illumination waveguide (2) to an imaging lens (3); The illumination light (100) is geometrically magnified by the imaging lens (3) and then projected onto the LCOS panel (4); After the illumination light (100) is emitted from the LCOS panel (4), it is phase modulated into P-line polarized light and forms imaging light (300); The imaging light (300) is magnified by the imaging lens (3) and then emitted from the exit pupil area (22) to the aperture (5); The imaging light (300) is emitted through the aperture (5) to an external optical waveguide device (01) to achieve projection imaging.

Images