Optical module and wearable device

Abstract

The embodiment of the present application provides an optical module and a wearable device; wherein the optical module comprises a lens group, a lens barrel, a first sealing element and a second sealing element; the lens group comprises a first lens and a myopia lens, the first lens and the myopia lens are all cut-edge lenses, and the first lens and the myopia lens both have at least one lens cut edge; one end of the lens barrel is provided with a gland, the myopia lens is arranged in the gland, the side of the gland has a cut edge side matched with the lens cut edge of the myopia lens, the lens barrel is provided with an inner cavity, the first lens is arranged in the inner cavity, and the side wall of the lens barrel has a longitudinal cut surface matched with the lens cut edge of the first lens; the first sealing element is located between the myopia lens and the gland, and the second sealing element is located between the gland and the lens barrel. The scheme provided by the embodiment of the present application can improve the sealing performance of the optical module, so as to protect the optical elements in the lens barrel.

Description

Technical Field

[0001] This application relates to the field of optical imaging technology, and more specifically, to an optical module and a wearable device. Background Technology

[0002] Virtual Reality (VR), also known as immersive technology, is a novel and practical technology that emerged in the 20th century. It encompasses computer science, electronic information, and simulation technology, and its basic implementation involves using computers to simulate a virtual environment, thereby creating a sense of immersion. Today, consumers have increasingly higher demands for VR products and user experiences, especially regarding the absence of any visual artifacts or imperfections in the image. This necessitates that product designs incorporate a sealed, airtight design.

[0003] Currently used sealing structures mostly aim to minimize assembly gaps in the structural components during the design phase. While this can provide a sealing effect to some extent, the structural components themselves have tolerances, and plastic parts, in particular, are subject to the physical properties of thermal expansion and contraction. It is difficult to guarantee the dimensional stability and uniformity of the structural components during manufacturing. Inadequate sealing can lead to repeated mold repairs and modifications, resulting in significant cost and time investment. Summary of the Invention

[0004] The purpose of this application is to provide a new technical solution for optical modules and wearable devices, which can achieve a good sealing effect for irregular lens barrels with chamfered lenses, so as to protect the internal optical components.

[0005] In a first aspect, this application provides an optical module. The optical module includes:

[0006] A lens assembly, the lens assembly including at least a first lens and a myopia lens, wherein both the first lens and the myopia lens are configured as edge-cut lenses, and both the first lens and the myopia lens have at least one lens edge;

[0007] A lens barrel, one end of which is provided with a pressure cap, the myopia lens being disposed within the pressure cap, the side of the pressure cap having a chamfered edge adapted to the chamfered edge of the myopia lens, the lens barrel having an inner cavity, the first lens being disposed within the inner cavity, and the side wall of the lens barrel having a longitudinal section adapted to the chamfered edge of the first lens; and,

[0008] A first seal and a second seal, wherein the first seal is located between the myopia lens and the pressure cap, and the second seal is located between the pressure cap and the lens barrel.

[0009] Optionally, the first seal is disposed within the first gap formed between the myopia lens and the pressure cap;

[0010] The first seal is configured to fit tightly or with an interference fit with the first gap. The first seal is flush with the top of the myopia lens and the cap. The first seal is used to seal the first gap.

[0011] Optionally, the first seal is a closed ring body, which surrounds the outer periphery of the myopia lens and is adapted to the edge contour of the myopia lens. The first seal includes a first cut edge segment adapted to the cut edge of the myopia lens.

[0012] Optionally, the pressure cap is provided with a lens mounting hole for accommodating the myopia lens and a first mounting groove surrounding the hole wall of the lens mounting hole, and the first sealing member is pressed into the first mounting groove.

[0013] Optionally, the first mounting groove includes at least a first mounting section and a second mounting section, the first mounting section corresponding to the cut edge of the myopia lens, and the second mounting section corresponding to the arc edge of the myopia lens.

[0014] Optionally, the optical module further includes an eye-tracking component, which is disposed on one side of the pressure cap and located in the inner cavity. The eye-tracking component, the pressure cap, and the side wall of the lens barrel together form a second gap, and the second seal is embedded in the second gap.

[0015] Optionally, the second seal and the second gap are configured to fit tightly or with an interference fit, and the second seal is used to seal the second gap.

[0016] Optionally, the eye-tracking assembly includes a first support and an eye-tracking device disposed on the first support;

[0017] The first support is a closed ring structure, and the side of the first support has a support cut edge that matches the longitudinal section of the lens barrel.

[0018] The first bracket has a second mounting groove along its circumferential direction, and the second seal is pressed into the second mounting groove. The second seal includes a second cut edge segment that matches the cut edge of the bracket.

[0019] Optionally, at least one of the first seal and the second seal is made of nitrile rubber.

[0020] Optionally, the optical module further includes a second lens and a third lens, both of which are configured as chamfered lenses;

[0021] The first lens, the second lens, and the third lens are spaced apart in the inner cavity along the axial direction of the lens barrel, and the lens edges of each lens correspond to each other. The first lens, the second lens, and the third lens are located on the same optical axis.

[0022] Optionally, the myopia lens and the cover are detachably connected, and the myopia lens is configured to be replaceable according to the user's vision to match the target user's vision.

[0023] Optionally, the optical module further includes a display screen and a second bracket, wherein the display screen is bonded and fixed within the second bracket;

[0024] The end of the lens barrel away from the pressure cap is provided with a rear cover, and the second bracket is connected to the rear cover.

[0025] Secondly, this application provides a wearable device, the wearable device comprising:

[0026] Casing; and

[0027] The optical module as described in the first aspect is disposed in the housing.

[0028] Optionally, the housing is a lens frame, and the lens frame is provided with two lens frames; the optical module is provided with two, and the two optical modules are disposed in the two lens frames.

[0029] The beneficial effects of this application are as follows:

[0030] According to an embodiment of this application, an optical module is provided, in which two sealing elements are introduced to seal the gap between the myopia lens and the cap, and the gap between the cap and the lens barrel, respectively, which can better improve the sealing performance of the lens barrel; by introducing the myopia lens, the optical module can match the vision of the target object, so that people with different vision can use the optical module; moreover, the lenses in the optical module are all set as irregularly shaped chamfered lenses. The assembly precision requirements of the sealing design in this application are not high, but a very good sealing effect can be achieved.

[0031] Other features and advantages of this specification will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of this specification and, together with their description, serve to explain the principles of this specification.

[0033] Figure 1 This is a schematic diagram of the structure of the optical module provided in the embodiments of this application;

[0034] Figure 2 A cross-sectional view of the optical module provided in an embodiment of this application;

[0035] Figure 3 An enlarged schematic diagram of the mounting location of the second seal provided in an embodiment of this application;

[0036] Figure 4 A top view of the optical module provided in the embodiments of this application;

[0037] Figure 5 An installation position diagram of the first seal installed at the gland provided in the embodiments of this application;

[0038] Figure 6 A schematic diagram illustrating the installation relationship between the first seal, the gland, and the myopia lens provided in an embodiment of this application;

[0039] Figure 7 A schematic diagram showing the installation relationship of the second seal, the gland, and the eye-tracking assembly provided in an embodiment of this application;

[0040] Figure 8 A diagram showing the installation position of the second seal at the second bracket, as provided in an embodiment of this application.

[0041] Figure 9 This is one of the structural schematic diagrams of the first sealing element provided in the embodiments of this application;

[0042] Figure 10 A second schematic diagram of the structure of the first sealing element provided in the embodiments of this application;

[0043] Figure 11 This is one of the structural schematic diagrams of the second seal provided in the embodiments of this application;

[0044] Figure 12 This is a second schematic diagram of the structure of the second seal provided in the embodiments of this application.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. First lens; 2. Second lens; 3. Third lens; 4. Myopia lens; 5. Display screen; 6. Lens barrel; 601. Longitudinal section; 7. Cover; 701. Cut edge side; 702. First mounting groove; 8. Rear cover; 9. Eye-tracking assembly; 901. First bracket; 9011. Second mounting groove; 10. Second bracket; 11. First seal; 1101. First cut edge segment; 12. Second seal; 1201. Second cut edge segment. Detailed Implementation

[0047] Various exemplary embodiments of this 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, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application.

[0048] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0049] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0050] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0051] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0052] According to one aspect of the embodiments of this application, an optical module is provided, which is suitable for use in a head-mounted display (HMD), such as a VR head-mounted display device. The aforementioned VR head-mounted device may include, for example, VR glasses or VR helmets, and the embodiments of this application do not impose specific limitations thereon.

[0053] In VR product design, taking VR glasses as an example, to avoid obstructing the user's nose bridge, brow bone, and other areas, the lenses used in the optical module can be chamfered. This results in a non-circular structure for the lenses, and consequently, a non-circular shape for the lens barrel. Chamfered lenses have irregular shapes.

[0054] VR product assembly is typically carried out in cleanrooms, with strict requirements regarding dust particles. The aim is to prevent dust particles from entering the lens barrel and settling on the display screen or lenses, affecting user experience and causing visual blurring. This necessitates that VR products be designed with a sealing structure in mind. For lens barrels with large-edge lenses, the irregular shape makes achieving a seal more difficult and requires higher precision.

[0055] The optical module provided in this application embodiment is described in [reference]. Figures 1 to 4The optical module includes a lens assembly, a lens barrel 6, a first sealing element 11, and a second sealing element 12. The lens assembly includes at least a first lens 1 and a myopia lens 4, both of which are chamfered lenses with at least one chamfered edge. A pressure cap 7 is provided at one end of the lens barrel 6, and the myopia lens 4 is disposed within the pressure cap 7. The side of the pressure cap 7 has a chamfered edge side 701 that matches the chamfered edge of the myopia lens 4. The lens barrel 6 has an inner cavity, and the first lens 1 is disposed within the inner cavity. The side wall of the lens barrel 6 has a longitudinal section 601 that matches the chamfered edge of the first lens 1. The first sealing element 11 is located between the myopia lens 4 and the pressure cap 7, and the second sealing element 12 is located between the pressure cap 7 and the lens barrel 6.

[0056] In the optical module provided in the above embodiment, since a specially designed myopia lens 4 is provided on the lens barrel 6, the refractive power of the optical module can be adjusted to match the visual acuity of the target object. This design allows users to see clear images without wearing glasses, making the optical module suitable for people with different visual acuity and with a wider range of applications.

[0057] According to the optical module proposed in this application embodiment, two sealing structural components are introduced, namely the first sealing component 11 and the second sealing component 12 mentioned above. The first sealing component 11 is disposed between the myopia lens 4 and the pressure cap 7, and can be used to seal the gap between them, thus forming a sealing structure at the top of the lens barrel 6. The second sealing component 12 is disposed between the pressure cap 7 and the lens barrel 6 at the connection point, and can seal the gap between the pressure cap 7 and the lens barrel 6, forming another sealing structure at the connection point between the lens barrel 6 and the pressure cap 7. These two sealing structures enable the lens barrel 6 to have good sealing performance.

[0058] The first sealing element 11 is placed directly between the myopia lens 4 and the pressure cap 7, and the second sealing element 12 is placed directly between the pressure cap 7 and the lens barrel 6. This can be achieved simply by making the sealing element structure in the relevant structural components. The requirements for precision are not high, and it will not increase the cost.

[0059] The sealing design proposed in this application embodiment, in which the first sealing element 11 and the second sealing element 12 cooperate with each other, can be used in the lens barrel 6 with a chamfered lens. Its assembly precision requirements are low, achieving effective sealing of the lens barrel 6 with the chamfered lens, which can greatly improve product quality and increase product yield. Because the lens barrel 6 has good sealing performance, dust and other particles will not be introduced and fall onto the lens and display screen, which helps users see clear images and improves the user experience.

[0060] The optical module sealing solution provided in this application is particularly suitable for lens barrels with large-edge lenses, and of course it is also applicable to conventional lens barrels with round lenses. It has a wide range of applications and strong versatility.

[0061] The optical module provided in this application includes lenses installed at the end of the lens barrel or inside the lens barrel. For example, the myopia lens 4 and the first lens 1 in the above embodiment are both set as chamfered lenses. These lenses are not traditional circular structures, but rather non-circular or other irregular structures. Thus, the corresponding lens barrel 6 is a non-circular or other irregular structure adapted to the shape of the lens. This design mainly takes into account the problem of interference between traditional circular structures and the bridge of the human nose, resulting in a product that can effectively avoid the bridge of the nose area, improving the user's wearing comfort.

[0062] In addition, considering the different interpupillary distances of different groups of people, in order to ensure that most people can use the optical module, that is, to improve the versatility of the optical module, the optical module was designed according to the minimum interpupillary distance. This is also one of the reasons for considering the use of chamfered lenses.

[0063] The optical module provided in this application embodiment includes, for example, a lens group, which includes at least a first lens 1 and a myopia lens 4. Specifically, see Figure 1 and Figure 2 The optical module can be a combination of a first lens 1 and a myopia lens 4. The first lens 1 is primarily used for imaging, while the myopia lens 4 can be used to adjust the diopter of the optical module. In conjunction with the first lens 1, it can achieve high-quality, clear imaging. Both the first lens 1 and the myopia lens 4 can be, for example, chamfered lenses. Furthermore, optical elements such as beam splitters, phase delayers, and polarization reflectors can be incorporated within the entire optical module to create a pancake-like optical path structure.

[0064] Specifically, the optical module includes two optical lenses: a first lens 1 and a myopia lens 4. In addition, the optical module also includes a beam splitter, a phase delayer, and a polarization reflection element. These optical elements (optical films) can be disposed at any suitable position between the first lens 1 and the myopia lens 4, or at suitable positions on both sides of the first lens 1 or on either side, so that the entire optical module forms a folded optical path. The imaging light is reflected back between the formed folded optical paths, which can extend the propagation path of the light and facilitate the final clear imaging.

[0065] In the optical module of this application embodiment, the number of lenses includes, but is not limited to, one of the above-mentioned features, and the number of lenses can be flexibly adjusted according to specific needs. While increasing the number of lenses can improve the imaging quality of the optical module, it can also affect the size of the optical module along the optical axis (lateral direction), resulting in a larger volume and increased weight of the optical module.

[0066] The beam-splitting element is, for example, a semi-transparent and semi-reflective device, allowing a portion of the light to pass through while reflecting the rest. The reflectivity of the beam-splitting element is, for example, 47% to 53%.

[0067] The phase retarder is, for example, a quarter-wave plate. Of course, the phase retarder can also be other phase retarders such as a half-wave plate, as needed. The phase retarder can be used to change the polarization state of light. For example, it can be used to convert linearly polarized light into circularly polarized light, or vice versa.

[0068] The polarization reflecting element is a polarization reflector that reflects horizontally linearly polarized light and transmits vertically linearly polarized light, or any other polarization reflector that reflects linearly polarized light at a specific angle and transmits linearly polarized light in a direction perpendicular to that angle.

[0069] In embodiments of this application, the phase delayer and the polarization reflection element work together to resolve and transmit light.

[0070] The arrangement of the beam splitter, the phase retarder, and the polarization reflection element within the lens group is flexible. They can be arranged on either side of the first lens 1 as described above, or on both sides, as needed. However, it is necessary to ensure that the phase retarder is located between the beam splitter and the polarization reflection element.

[0071] See some examples in this application. Figure 1 , Figure 5 and Figure 6 The first sealing member 11 is disposed in the first gap formed between the myopia lens 4 and the pressure cover 7. The first sealing member 11 and the first gap are configured to be tightly fitted or interference-fitted. The first sealing member 11 is flush with the top of the myopia lens 4 and the pressure cover 7. The first sealing member 11 is used to seal the first gap.

[0072] The first sealing member 11 can be installed along the edge contour of the myopia lens 4 between the outer periphery of the myopia lens 4 and the pressure cover 7, so as to completely seal the first gap formed on the pressure cover 7 where the myopia lens 4 is assembled, thereby improving the sealing performance of the lens barrel 6.

[0073] The reason for the gap between the pressure cap 7 and the myopia lens 4 is that the myopia lens 4 is designed to be replaceable according to the user's vision requirements. The myopia lens 4 is not usually fixed to the pressure cap 7 with adhesive. Therefore, an assembly gap is unavoidable during assembly, which the first sealing member 11 can effectively seal. When this gap exists, dust, impurities, and other particulate matter from the outside may enter the inner cavity of the lens barrel 6 through this gap during the assembly or use of the optical module. When dust falls on the lens or display screen, it will affect the clarity of the image. Therefore, it is necessary to seal this gap.

[0074] The first sealing element 11 is disposed in the first gap between the myopic lens 4 and the pressure cap 7, and its fit with the myopic lens 4 and the pressure cap 7 is zero clearance, or even an interference fit. The top of the first sealing element 11 is flush with the top of the myopic lens 4 and the pressure cap 7, ensuring that the first sealing element 11 forms a tight seal with the myopic lens 4 and the pressure cap 7, thus achieving a complete seal.

[0075] In the above example, the first seal 11 is, for example, a closed ring body. The first seal 11 surrounds the outer periphery of the myopia lens 4 and is configured to fit the edge contour of the myopia lens 4. The first seal 11 includes a first cut-edge segment 1101 that fits the cut edge of the myopia lens 4. See [link to documentation]. Figure 9 and Figure 10 .

[0076] The first sealing element 11 is, for example, a sealing ring, which is adapted to the shape of the myopia lens 4. When the first sealing element 11 is fitted onto the outside of the myopia lens 4, the first cut edge segment 1101 on the first sealing element 11 should be located outside the cut edge of the myopia lens 4.

[0077] It should be noted that the myopia lens 4 also has a non-lens cut edge, that is, the original arc edge. In this case, the corresponding first sealing member 11 also has a matching arc segment. By designing the first sealing member 11 to fit the myopia lens 4, the gap between the myopia lens 4 and the pressure cap 7 can be sealed better and more completely. There is no complicated assembly relationship in achieving the seal; the first sealing member 11 can be directly placed in the corresponding position.

[0078] Optionally, the pressure cap 7 is provided with a lens mounting hole for accommodating the myopia lens 4 and a first mounting groove 702 surrounding the hole wall of the lens mounting hole, and the first sealing member 11 is pressed into the first mounting groove 702.

[0079] The pressure cap 7 is designed with a structural groove specifically for accommodating the first sealing element 11, namely the first mounting groove 702 mentioned above, which makes the installation and positioning of the first sealing element 11 easy.

[0080] The shape of the lens mounting hole is designed to match the shape of the myopia lens 4 so as to accommodate the myopia lens 4.

[0081] The lens barrel 6 is, for example, a hollow cylindrical structure with two opposing ends, such as a first end and a second end. Based on this, the lens mounting hole is located, for example, at one end of the lens barrel 6, such as the first end, so that the myopia lens 4 is assembled at the first end of the lens barrel 6, thus defining the placement position of the myopia lens 4.

[0082] For example, when the optical module is in use, with the first end of the lens barrel 6 close to the human eye, the myopia lens 4 is also close to the human eye and can be used as myopia glasses. The diopter of the optical module can be adjusted to match the user's diopter. When the diopter of the myopia lens 4 matches the diopter of the target object (user), the target object (user) can see a clear image without wearing glasses.

[0083] The myopia lens 4 and the pressure cover 7 are detachably connected. The myopia lens 4 is configured to be replaceable according to the user's vision to match the target user's vision.

[0084] Specifically, the myopia lens 4 is detachably disposed in the lens mounting hole on the pressure cover 7. When using the optical module, the user can select the myopia lens 4 with the appropriate degree according to their own vision and place it in the lens mounting hole for use.

[0085] Optionally, in order to fix the myopia lens 4 in place when the optical module is in use, the myopia lens 4 can be designed to be magnetically attached to the lens mounting hole, so that the myopia lens 4 is not easy to fall off.

[0086] The first mounting groove 702 includes at least a first mounting section and a second mounting section; wherein the first mounting section corresponds to the cut edge of the myopia lens 4, and the second mounting section corresponds to the arc edge of the myopia lens 4.

[0087] In order to ensure that the first sealing element 11 and the first mounting groove 702 fit perfectly, the first mounting groove 702 used to accommodate the first sealing element 11 is designed with an irregular shape with chopped edges.

[0088] The shape of the first mounting groove 702 is adapted to the shape of the myopia lens 4, so that the first sealing member 11, which is adapted to the shape of the myopia lens 4, can be completely pressed into the first mounting groove 702.

[0089] Optionally, the cross-sectional shape of the first mounting groove 702 is rectangular.

[0090] For example, for the first mounting slot 702, see Figure 5 The groove width A is set to 1mm, and the heights on both sides of the groove are different. The groove height B1 on the side closer to the myopia lens 4 is 0.2mm, and the groove height B2 on the side farther from the myopia lens 4 is 1.8mm. At the same time, in order to ensure sufficient strength at the first mounting groove 702 on the pressure cover 7, the wall thickness of the side of the pressure cover 7 should not be less than 0.6mm, such as 0.6mm.

[0091] See some examples in this application. Figure 1 , Figure 3 , Figure 7 and Figure 8 The optical module further includes an eye-tracking component 9, which is disposed on one side of the pressure cover 7 and located in the inner cavity. The eye-tracking component 9, the pressure cover 7, and the side wall of the lens barrel 6 together form a second gap, and the second sealing member 12 is disposed in the second gap.

[0092] When the eye-tracking component 9 is introduced into the optical module, due to structural design considerations, a gap, namely the second gap mentioned above, will also be formed at the connection point between the pressure cap 7, the eye-tracking component 9, and the lens barrel 6. This second gap also poses a risk of dust and other particulate matter entering. Therefore, a second seal 12 is designed to seal the second gap. See [link to documentation]. Figure 7 and Figure 8 .

[0093] Optionally, the second seal 12 and the second gap are configured to fit tightly or with an interference fit, and the second seal 12 is used to seal the second gap.

[0094] The eye-tracking assembly 9 includes a first bracket 901 and an eye-tracking device disposed on the first bracket 901. The first bracket 901 is a closed ring structure. The side of the first bracket 901 has a bracket cut edge that matches the longitudinal section 601 of the lens barrel 6. The edge of the first bracket 901 is provided with a second mounting groove 9011 along the circumferential direction. The second sealing member 12 is pressed into the second mounting groove 9011. The second sealing member 12 has a second cut edge segment 1201 that matches the bracket cut edge.

[0095] The structure of the second seal 12 is shown in the figure. Figure 11 and Figure 12 It is adapted to the shape of the lens tube 6 and is also an irregular structure.

[0096] In order to fit the longitudinal section 601 of the lens barrel 6, the first bracket 901 for supporting the eye tracking device is designed to have a bracket cut edge that is suitable for the longitudinal section 601. Of course, the first bracket 901 also has a rounded edge, which together with the bracket cut edge forms a closed loop.

[0097] For example, see Figure 3 and Figure 7 The second sealing element 12 is a sealing ring. The second sealing element 12 is designed to be sleeved on the outer side of the lower end of the first bracket 901. The second sealing element 12 has a contour that matches the shape of the first bracket 901. Therefore, the second sealing element 12 also has a cut edge side, namely the second cut edge segment 1201 mentioned above.

[0098] Specifically, an annular groove is designed on the first bracket 901 supporting the eye-tracking device as a second mounting groove 9011. The width C of the second mounting groove 9011 is, for example, 0.8 mm, and the height D of the second mounting groove 9011 is, for example, 1 mm. Figure 8 As shown.

[0099] The second sealing element 12 is installed in the second mounting groove 9011 provided on the first bracket 901. The pressure cap 7 and the second sealing element 12 fit tightly without gaps. Figure 7 As shown.

[0100] Furthermore, the second seal 12 also has an irregular structure with a rectangular cross-section, as shown in the figure below. Figure 11 and Figure 12 As shown. The second seal 12 can be used in optical modules with chamfered lenses.

[0101] The optical module proposed in this application can be applied to VR devices. Specifically, in order to achieve certain functions, VR devices need to track the user's eyes. During eye tracking, an image including the user's eyes can be captured by a camera with a large field of view to further track the user's eyes.

[0102] In the example above, the eye-tracking component 9 and the myopia lens 4 are positioned at the end of the lens barrel 6 closest to the human eye, so that the eye-tracking component 9 can be as close to the human eye as possible, which helps to improve the accuracy of eye tracking.

[0103] The eye-tracking device includes components such as an infrared light source and an eye-tracking camera.

[0104] The first seal 11 and the second seal 12 may be made of rubber material.

[0105] In some examples of this application, the first seal 11 and the second seal 12 are made of nitrile rubber.

[0106] Nitrile rubber is one of the most representative rubbers in terms of its excellent comprehensive properties, such as oil resistance, physical and mechanical properties, and chemical resistance. Effectively utilizing these properties can meet various applications.

[0107] Preferably, both the first seal 11 and the second seal 12 are made of nitrile rubber.

[0108] In some examples of this application, the optical module further includes a second lens 2 and a third lens 3, both of which are configured as chamfered lenses;

[0109] The first lens 1, the second lens 2 and the third lens 3 are spaced apart along the axial direction of the lens barrel 6 in the inner cavity and the lens edges of each lens are corresponding. The first lens 1, the second lens 2 and the third lens 3 are located on the same optical axis.

[0110] It should be noted that the lens barrel 6 is not limited to having a first lens 1, but may also include two or more lenses, such as the second lens 2 and the third lens 3 mentioned above.

[0111] When an optical module contains multiple lenses, each lens can be a chamfered lens. Therefore, when assembling the optical module, it is necessary to ensure that the chamfers of each lens correspond.

[0112] Since each lens is a non-circular structure, the lens barrel 6 that supports these lenses is also designed as a non-circular structure, which can avoid the user's nose bridge area or brow bone area in terms of shape, which is beneficial for the product shape optimization design of VR devices such as VR smart glasses.

[0113] Furthermore, the first lens 1, the second lens 2, and the third lens 3 are spaced apart, and the specific spacing can be adjusted according to actual needs. This embodiment does not impose any restrictions on this.

[0114] See some examples in this application. Figure 2 The optical module also includes a display screen 5 and a second bracket 10. The display screen 5 is glued and fixed inside the second bracket 10. A rear cover 8 is provided at the end of the lens barrel 6 away from the pressure cover 7, and the second bracket 10 is connected to the rear cover 8.

[0115] The display screen 5 is used to emit imaging light. The display screen 5 is supported by a specially designed second bracket 10, which is connected to the rear cover 8. The second bracket 10 and the display screen 5 are located within the inner cavity of the lens barrel 6. The display screen 5 and the third lens 3 are spaced apart.

[0116] See a specific example in this application. Figure 1 and Figure 2 The optical module includes a first lens 1, a second lens 2, a third lens 3, and a myopia lens 4. Each lens is a chamfered lens and is located on the same optical axis. The chamfered edges of all lenses correspond to each other.

[0117] The optical module also includes a lens barrel 6, a first sealing element 11, and a second sealing element 12; one end of the lens barrel 6 is provided with a pressure cap 7, and the myopia lens 4 is detachably disposed within the pressure cap 7.

[0118] It is configured to be changed according to the user's vision to match the target user's vision; the side of the cover 7 has a cut edge side 701 that is adapted to the cut edge of the myopia lens 4;

[0119] The side wall of the lens barrel 6 has a longitudinal section 601. The lens barrel 6 is provided with an inner cavity. The first lens 1, the second lens 2 and the third lens 3 are all disposed in the inner cavity at intervals. The first sealing member 11 is located between the myopia lens 4 and the pressure cap 7, and the second sealing member 12 is located between the pressure cap 7 and the lens barrel 6.

[0120] The first sealing element 11 is disposed in the first gap formed between the myopic lens 4 and the pressure cap 7. The first sealing element 11 is a closed ring body. The first sealing element 11 surrounds the outer periphery of the myopic lens 4 and is adapted to the edge contour of the myopic lens 4. The first sealing element 11 has a first cut edge segment 1101 adapted to the cut edge of the myopic lens 4. The first sealing element 11 is interference-fitted with the first gap. The first sealing element 11 is flush with the top of the myopic lens 4 and the pressure cap 7. The first sealing element 11 is used to seal the first gap.

[0121] The pressure cap 7 is provided with a lens mounting hole for accommodating the myopia lens 4 and a first mounting groove surrounding the hole wall of the lens mounting hole. The first sealing member is pressed into the first mounting groove. The first mounting groove includes at least a first mounting section and a second mounting section. The first mounting section corresponds to the cut edge of the myopia lens 4, and the second mounting section corresponds to the arc edge of the myopia lens 4.

[0122] The optical module is also designed to include an eye-tracking component 9, which is disposed on one side of the pressure cover 7 and located in the inner cavity. The eye-tracking component 9, the pressure cover 7, and the side wall of the lens barrel 6 together form a second gap, and the second sealing member is disposed in the second gap. The second sealing member 12 is configured to be interference-fitted with the second gap, and the second sealing member 12 is used to seal the second gap.

[0123] The eye-tracking assembly 9 includes a first bracket 901 and an eye-tracking device disposed on the first bracket 901. The first bracket 901 is a closed ring structure, and its side has a bracket cut edge that matches the longitudinal section 601 of the lens barrel 6. The edge of the first bracket 901 is provided with a second mounting groove 9011 along the circumferential direction. The second sealing member 12 is pressed into the second mounting groove 9011. The second sealing member 12 has a second cut edge segment 1201 that matches the bracket cut edge.

[0124] The first seal 11 and the second seal 12 are made of nitrile rubber;

[0125] The optical module also includes a display screen 5 and a second bracket 10. The display screen 5 is glued and fixed inside the second bracket 10. A rear cover 8 is provided at the end of the lens barrel 6 away from the pressure cover 7, and the second bracket 10 is connected to the rear cover 8.

[0126] According to another aspect of the embodiments of this application, a wearable device is also provided, the wearable device including a housing and an optical module as described above, the optical module being disposed in the housing.

[0127] The wearable device is, for example, a VR headset, including VR glasses or a VR helmet, etc., and this application embodiment does not impose specific limitations on it.

[0128] For example, the housing is a lens frame, and the lens frame is provided with two lens frames; the optical module is provided with two, and the two optical modules are disposed in the two lens frames.

[0129] The specific implementation of the head-mounted display device in this application can refer to the above-described embodiments of the optical module. Therefore, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0130] The above embodiments mainly describe 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. For the sake of brevity, they will not be elaborated here.

[0131] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. An optical module, characterized in that, The optical module includes: The lens group includes at least a first lens (1) and a myopia lens (4), wherein the first lens (1) and the myopia lens (4) are both configured as edge-cut lenses, and the first lens (1) and the myopia lens (4) each have at least one lens edge; A lens barrel (6), one end of which is provided with a pressure cap (7), the myopia lens (4) is disposed inside the pressure cap (7), the side of the pressure cap (7) has a chamfered side (701) adapted to the chamfered edge of the myopia lens (4), the lens barrel (6) is provided with an inner cavity, the first lens (1) is disposed in the inner cavity, and the side wall of the lens barrel (6) has a longitudinal section (601) adapted to the chamfered edge of the first lens (1); and, A first sealing element (11) and a second sealing element (12), wherein the first sealing element (11) is located between the myopia lens (4) and the pressure cap (7), and the second sealing element (12) is located between the pressure cap (7) and the lens barrel (6); The first sealing member (11) is disposed in the first gap formed between the myopia lens (4) and the pressure cap (7); the first sealing member (11) is flush with the top of the myopia lens (4) and the pressure cap (7), and the first sealing member (11) is used to seal the first gap; The optical module also includes an eye-tracking component (9), which is disposed on one side of the cover (7) and located in the inner cavity. The eye-tracking component (9), the cover (7), and the side wall of the lens barrel (6) form a second gap, and the second seal (12) is embedded in the second gap. The first seal (11) and the first gap are configured to fit tightly or with an interference fit; The first seal (11) includes a first cut edge segment (1101) that is adapted to the cut edge of the myopia lens (4); The second seal (12) and the second gap are configured to fit tightly or with an interference fit, and the second seal (12) is used to seal the second gap; The eye-tracking assembly (9) includes a first bracket (901) and an eye-tracking device disposed on the first bracket (901); wherein, the first bracket (901) is a closed ring structure, and the side of the first bracket (901) has a bracket cut edge that is adapted to the longitudinal section (601) of the lens barrel (6); the edge of the first bracket (901) is provided with a second mounting groove (9011) in the circumferential direction, and the second seal (12) is pressed into the second mounting groove (9011), and the second seal (12) includes a second cut edge segment (1201) adapted to the bracket cut edge.

2. The optical module according to claim 1, characterized in that, The first sealing element (11) is a closed ring body. The first sealing element (11) surrounds the outer periphery of the myopia lens (4) and is adapted to the edge contour of the myopia lens (4).

3. The optical module according to claim 2, characterized in that, The pressure cap (7) is provided with a lens mounting hole for accommodating the myopia lens (4) and a first mounting groove (702) surrounding the hole wall of the lens mounting hole, and the first sealing member (11) is pressed into the first mounting groove (702).

4. The optical module according to claim 3, characterized in that, The first mounting groove (702) includes at least a first mounting section and a second mounting section. The first mounting section corresponds to the lens cut edge of the myopia lens (4), and the second mounting section corresponds to the arc edge of the myopia lens (4).

5. The optical module according to claim 1, characterized in that, At least one of the first seal (11) and the second seal (12) is made of nitrile rubber.

6. The optical module according to claim 1, characterized in that, The optical module also includes a second lens (2) and a third lens (3), both of which are configured as edge-cut lenses; The first lens (1), the second lens (2) and the third lens (3) are spaced apart in the inner cavity along the axial direction of the lens barrel (6) and the lens edges of each lens are corresponding. The first lens (1), the second lens (2) and the third lens (3) are located on the same optical axis.

7. The optical module according to claim 1, characterized in that, The myopia lens (4) and the cover (7) are detachably connected. The myopia lens (4) is configured to be replaceable according to the user's vision to match the target user's vision.

8. The optical module according to claim 1, characterized in that, The optical module also includes a display screen (5) and a second bracket (10), wherein the display screen (5) is bonded and fixed inside the second bracket (10); The end of the lens barrel (6) away from the pressure cap (7) is provided with a rear cover (8), and the second bracket (10) is connected to the rear cover (8).

9. A wearable device, characterized in that, include: case; as well as The optical module as described in any one of claims 1-8, wherein the optical module is disposed in the housing.

10. The wearable device according to claim 9, characterized in that, The housing is a lens frame, and two lens frames are provided on the lens frame. There are two optical modules, and the two optical modules are disposed in the two lens frames.

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