Optical module and augmented reality glasses

Abstract

The invention provides an optical module which comprises a first lens, an optical waveguide element, a second lens, a fixing frame and a limiting element, the fixing frame is connected to at least an edge portion of the optical waveguide element. The limiting element is arranged on the side, facing the optical waveguide element, of the fixing frame. The optical module further comprises packaging glue or a locking element which is arranged on the fixing frame. And the packaging adhesive or the locking element is matched with the limiting element and the fixing frame so as to fix the first lens, the optical waveguide element and the second lens into a whole. According to the optical module, the problem that the gluing process is difficult and problems are caused by adopting packaging glue to bond all elements of the optical module can be effectively avoided, and the assembling efficiency of the optical module is improved. The invention further provides augmented reality glasses comprising the optical module.

Description

Technical Field

[0001] The present application relates to the field of optics, and in particular to an optical module and augmented reality glasses including the optical module. Background Art

[0002] Existing optical modules typically use optical adhesive to bond optical components together to achieve the desired optical design specifications. This bonding requires consideration of the refractive index differences between the optical components and the adhesive, and strict control of the process environment and bonding accuracy.

[0003] Compared to the bonding process for solid optical adhesives, the bonding process for liquid optical adhesives is more complex. Both solid and liquid optical adhesives require high precision, uniformity, and a bubble-free finish to achieve a seamless bond. Differences between the optical adhesive and the optical component can lead to undesirable defects during the bonding process, such as bubbles, adhesive defects, wrinkles, particles, warping, uneven joints, and the inability to rework. These defects can affect the final optical performance of the optical module. Summary of the Invention

[0004] In view of this, the present application provides an optical module that does not rely solely on optical glue to bond the various components of the optical module, thereby avoiding difficulties and problems in the gluing process and improving product assembly efficiency and yield.

[0005] An optical module comprises:

[0006] A first lens, an optical waveguide element, and a second lens stacked in sequence;

[0007] a fixed frame connected to at least an edge portion of the optical waveguide element;

[0008] a limiting element, disposed on a side of the fixing frame facing the optical waveguide element; and

[0009] The packaging glue or the locking element is provided on the fixing frame, and the packaging glue or the locking element cooperates with the limiting element and the fixing frame to fix the first lens, the optical waveguide element and the second lens into one body.

[0010] The optical module of the embodiment of the present application fixes the first lens, the optical waveguide element, and the second lens stacked in sequence into one body by providing a fixed frame, a limiting element, and one of the packaging glue and the locking element cooperating with each other, thereby effectively avoiding the difficulties and problems in the gluing process caused by using adhesives such as packaging glue to bond the various components of the optical module, and improving the assembly efficiency of the optical module.

[0011] In some embodiments, when the optical module includes the packaging glue;

[0012] The fixing frame connects the first lens, the optical waveguide element and the edge ends of the second lens;

[0013] The limiting element includes a limiting portion, and the limiting portion is fixed to the fixing frame by the packaging glue;

[0014] The fixing frame is provided with a rib corresponding to the first lens, the first lens, the optical waveguide element and the second lens stacked in sequence are clamped between the rib and the limiting portion, the sealing glue is provided in the connection area between the rib and the first lens, and the sealing glue is provided in the connection area between the limiting portion and the second lens.

[0015] In some embodiments, the surface of the rib facing the first lens matches the shape of the surface of the first lens facing away from the optical waveguide element, so that the edge of the first lens is attached to the rib;

[0016] The shape of the surface of the limiting portion facing the second lens matches the shape of the surface of the second lens facing away from the optical waveguide element, so that the edge of the second lens is attached to the limiting portion.

[0017] In some embodiments, the limiting element further includes a first spacer ring and a second spacer ring, wherein the first spacer ring is clamped between the optical waveguide element and the first lens, and the second spacer ring is clamped between the optical waveguide element and the second lens.

[0018] In some embodiments, the packaging glue is provided at the connection area between the first spacer ring and the optical waveguide element and at the connection area between the first spacer ring and the first lens;

[0019] The packaging glue is disposed in a connection area between the second spacer ring and the optical waveguide element and in a connection area between the second spacer ring and the second lens.

[0020] In some embodiments, when the optical module includes the locking element;

[0021] The fixed frame includes a first frame portion and a second frame portion that are rotatably connected, one end of the first frame portion is connected to one end of the second frame portion, and the other end of the first frame portion is connected to the other end of the second frame portion via the locking element;

[0022] The first frame portion and the second frame portion jointly surround peripheries of the first lens, the optical waveguide element, and the second lens.

[0023] In some embodiments, the limiting element is respectively provided on the first frame portion and the second frame portion, and the limiting element includes a first clamping portion and a second clamping portion spaced apart from each other, and the edge portion of the optical waveguide element is clamped between the first clamping portion and the second clamping portion.

[0024] In some embodiments, the limiting element further includes a third clamping portion, the third clamping portion is located on a side of the first clamping portion away from the second clamping portion, and the third clamping portion is spaced apart from the first clamping portion;

[0025] The edge of the first lens is sandwiched between the first holding portion and the third holding portion, and the first holding portion is sandwiched between the first lens and the optical waveguide element.

[0026] In some embodiments, the limiting element further includes a fourth clamping portion, the fourth clamping portion is located on a side of the second clamping portion away from the first clamping portion, and the fourth clamping portion is spaced apart from the first clamping portion;

[0027] A card slot is formed on the edge of the second lens, and the card slot cooperates with the fourth holding portion. The fourth holding portion extends into the card slot, and the second holding portion is sandwiched between the second lens and the optical waveguide element.

[0028] In some embodiments, when the optical module includes the locking element;

[0029] The fixing frame includes a first frame portion and a second frame portion that are separated, wherein the first frame portion and the second frame portion are respectively located at opposite ends of the optical waveguide element, and the optical waveguide element is sandwiched between the first frame portion and the second frame portion;

[0030] The locking element includes a first locking element and a second locking element. The first locking element locks the first lens, the first frame part and the second lens into one body, and fixes the first frame part between the first lens and the second lens. The second locking element locks the first lens, the second frame part and the second lens into one body, and fixes the second frame part between the first lens and the second lens.

[0031] In some embodiments, the first locking element includes a screw or a nut and a nut, wherein the screw or the nut passes through the first lens, the first frame portion, and the second lens, and the nut is locked on an end of the screw or the nut, thereby locking the first lens, the first frame portion, and the second lens into one;

[0032] The second locking element includes a screw or a nut and a nut, wherein the screw or the nut passes through the first lens, the second frame part and the second lens, and the nut is locked at the end of the screw or the nut, thereby locking the first lens, the second frame part and the second lens into one.

[0033] In some embodiments, the first frame portion and the second frame portion are respectively provided with a retaining groove, and opposite ends of the edge portion of the optical waveguide element are respectively constrained in the retaining groove of the first frame portion and the retaining groove of the second frame portion.

[0034] The present application also provides augmented reality glasses, comprising a projection system and the above-mentioned optical module, wherein the projection system is used to generate a light beam to be projected onto the optical module. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of an optical module according to the first embodiment of the present application.

[0036] Figure 2 for Figure 1 Schematic diagram of the assembly of the optical module.

[0037] Figure 3 This is a side view of the optical module according to the second embodiment of the present application.

[0038] Figure 4 This is a schematic top view of the optical module according to the second embodiment of the present application.

[0039] Figure 5 Schematic diagram of two states of the fixing frame of the optical module according to the second embodiment of the present application.

[0040] Figure 6 for Figure 3 Schematic diagram of the assembly of the optical module.

[0041] Figure 7 This is a schematic diagram of the optical module of the third embodiment of the present application.

[0042] Figure 8 for Figure 7 Schematic diagram of the assembly of the optical module.

[0043] Figure 9 This is a schematic diagram of the modules of the augmented reality glasses according to an embodiment of the present application.

[0044] Description of main component symbols:

[0045] Optical modules 100, 200, 300, first lens 20, optical waveguide element 10, second lens 30,

[0046] Fixed frame 40a, 40b, 40c, first spacer ring 61a, second spacer ring 61b, retaining edge 41, limiting portion 63,

[0047] Base plate 11, grating 13, first frame portion 42a, 44a, second frame portion 42b, 44b, locking elements 70, 80,

[0048] First clamping portion 62 , second clamping portion 64 , third clamping portion 66 , fourth clamping portion 68 , clamping block portion 21 , clamping slot 31 , through holes 22 , 442 , 32 , first locking element 81 , second locking element 82 , augmented reality glasses 400 , projection system 420 . DETAILED DESCRIPTION

[0049] The optical module of the embodiment of the present application is fixed together by providing a fixed frame, a limiting element, and one of a packaging glue and a locking element, thereby fixing the first lens, the optical waveguide element, and the second lens stacked in sequence into one body. This effectively avoids the use of packaging glue to bond the various components of the optical module, which may cause difficulties and problems in the gluing process, and improves assembly efficiency.

[0050] Example 1

[0051] Embodiment 1 of the present application provides an optical module, which can quickly and accurately fix the various components of the optical module together by setting a fixed frame and combining the use of limiting elements and packaging glue, effectively avoiding the use of packaging glue to bond the various components of the optical module, which may cause difficulties and problems in the gluing process, and improve efficiency.

[0052] like Figure 1 As shown, the optical module 100 includes a first lens 20, an optical waveguide element 10, and a second lens 30, which are stacked sequentially and spaced apart from each other. The optical module 100 also includes a fixed frame 40a, which is used to position the first lens 20, the optical waveguide element 10, and the second lens 30. The fixed frame 40a is disposed at the edges of the first lens 20, the optical waveguide element 10, and the second lens 30, and is connected to the edges of the first lens 20, the optical waveguide element 10, and the second lens 30.

[0053] like Figure 1 As shown, in the embodiment of the present application, the first lens 20 is a convex lens with one side being convex and the other side being flat, wherein the convex side faces away from the optical waveguide element 10 ; the second lens 30 is a concave lens with one side being concave and the other side being flat, wherein the concave side faces away from the optical waveguide element 10 .

[0054] like Figure 1As shown, the optical module also includes limiting elements disposed on the fixed frame 40a. The limiting elements include spacer rings disposed on opposite sides of the optical waveguide element 10, namely a first spacer ring 61a and a second spacer ring 61b. The first spacer ring 61a is sandwiched between the optical waveguide element 10 and the first lens 20, and is located at the edge of the optical waveguide element 10 and the edge of the first lens 20. The second spacer ring 61b is sandwiched between the optical waveguide element 10 and the second lens 30, and is located at the edge of the optical waveguide element 10 and the edge of the second lens 30. Thus, the provision of the first spacer ring 61a ensures an appropriate distance between the optical waveguide element 10 and the first lens 20, and the provision of the second spacer ring 61b also ensures an appropriate distance between the optical waveguide element 10 and the second lens 30.

[0055] It will be appreciated that the thickness of the first spacer ring 61a between the optical waveguide element 10 and the first lens 20 can be designed based on the focal lengths of the optical waveguide element 10 and the first lens 20, and the thickness of the second spacer ring 61b between the optical waveguide element 10 and the second lens 30 can be designed based on the focal lengths of the optical waveguide element 10 and the second lens 30. In the embodiment of the present application, the first spacer ring 61a and the second spacer ring 61b both extend in an annular shape, but this is not limiting. For example, the first spacer ring 61a can also be configured as two separate parts, each located at opposite ends of the first lens 20, and the second spacer ring 61b can also be configured as two separate parts, each located at opposite ends of the second lens 30.

[0056] In this embodiment of the present application, the fixed frame 40a is provided with a retaining edge 41 to restrain the first lens 20. Because the surface of the first lens 20 facing away from the optical waveguide element 10 is convex, the surface of the retaining edge 41 facing the first lens 20 is configured as an arc-shaped curved surface to mate with the convex surface of the first lens 20. This allows the edge of the convex surface of the first lens 20 to adhere to the curved surface of the retaining edge 41, thereby restraining the edge of the first lens 20. In this embodiment of the present application, the fixed frame 40a and the retaining edge 41 are integrally formed, but this is not a limitation.

[0057] It is understandable that the surface of the first lens 20 facing away from the optical waveguide element 10 is not limited to a convex surface, and can also be a concave surface, an aspherical surface, or a free-form surface. In short, the surface of the retaining edge 41 of the fixing frame 40a facing the first lens 20 is designed to cooperate with the surface of the first lens 20 facing away from the optical waveguide element 10, so that the first lens 20 can be attached to the retaining edge 41.

[0058] In other embodiments, the edge portion of the first lens 20 that contacts the rib 41 of the fixed frame 40 a is a non-visible area of the first lens 20 . Therefore, regardless of the type of surface of the first lens 20 facing away from the optical waveguide element 10 , the surface of the edge portion of the first lens 20 can be processed to be a plane, and the surface of the rib 41 of the corresponding fixed frame 40 a facing the first lens 20 is also designed to be a plane.

[0059] In the embodiment of the present application, the limiting element further includes a limiting portion 63 provided on the fixed frame 40a to limit the second lens 30. Figure 1 As shown, since the surface of the second lens 30 facing away from the optical waveguide element 10 is concave, the surface of the retaining portion 63 facing the second lens 30 is configured as an arc-shaped curved surface to mate with the concave surface of the second lens 30. In this way, the edge of the concave surface of the second lens 30 can be attached to the curved surface of the retaining portion 63, thereby retaining the edge of the second lens 30.

[0060] It is understandable that the surface of the second lens 30 facing away from the optical waveguide element 10 is not limited to a concave surface, and can also be a convex surface, an aspherical surface, or a free-form surface. In short, the surface of the limiting portion 63 facing the second lens 30 is designed to cooperate with the surface of the second lens 30 facing away from the optical waveguide element 10, thereby limiting the second lens 30.

[0061] In other embodiments, the edge portion of the second lens 30 that contacts the limiting portion 63 is a non-visible area of the second lens 30. Therefore, regardless of the type of the surface of the second lens 30 facing away from the optical waveguide element 10, the surface of the edge portion of the second lens 30 can be set to be a plane, and the surface of the corresponding limiting portion 63 facing the second lens 30 is also designed to be a plane.

[0062] Thus, through the cooperation between the fixed frame 40a and the stopper 63, the first lens 20, the first spacer ring 61a, the optical waveguide element 10, the second spacer ring 61b, and the second lens 30, which are sequentially stacked, are stopped between the retaining edge 41 of the fixed frame 40a and the stopper 63. Furthermore, the first lens 20 is sandwiched between the retaining edge 41 of the fixed frame 40a and the first spacer ring 61a, the second lens 30 is sandwiched between the stopper 63 and the second spacer ring 61b, and the optical waveguide element 10 is sandwiched between the first spacer ring 61a and the second spacer ring 61b.

[0063] It is understandable that the optical module 100 also includes a packaging glue ( Figure 1(not shown), encapsulant may be disposed between the fixed frame 40a and the stopper 63 to secure the stopper 63 to the fixed frame 40a. Encapsulant may also be disposed in the connection areas between the optical waveguide component 10, the first lens 20, and the fixed frame 40a; the connection areas between the first spacer ring 61a, the optical waveguide component 10, the fixed frame 40a; the connection areas between the optical waveguide component 10, the first lens 20, and the fixed frame 40a; the connection areas between the second spacer ring 61b, the optical waveguide component 10, the fixed frame 40a; the connection areas between the optical waveguide component 10, the second lens 30, and the fixed frame 40a; and the connection areas between the stopper 63 and the optical waveguide component 10. The provision of encapsulant effectively enhances the secure connection between the first lens 20, the optical waveguide component 10, the second lens 30, and the spacer rings.

[0064] In some embodiments, the fixing frame 40a includes a first frame portion and a second frame portion. The first frame portion and the second frame portion are located at opposite ends of the stacked first lens 20, optical waveguide element 10, and second lens 30. The first frame portion and the second frame portion each have a rib 41.

[0065] In other embodiments, the fixing frame 40a is cylindrical and surrounds the periphery of the stacked first lens 20, the optical waveguide element 10, and the second lens 30. A rib 41 extends from the inner wall of the fixing frame 40a.

[0066] It is understandable that the limiting portion 63 includes two separate parts, which are respectively located at opposite ends of the second lens 30 , or the limiting portion 63 can be extended into a ring shape to cover the non-visible area of the edge portion of the second lens 30 .

[0067] See also Figure 2 , the assembly and fixing method of the optical module 100 includes:

[0068] Place the first lens 20 on the fixed frame 40a, and the edge of the first lens 20 is close to the retaining edge 41 of the fixed frame 40a. Before placing the first lens 20, glue can be applied to the connection area between the first lens 20 and the fixed frame 40a. Figure 2 The oval area represents the dispensing area, but is not limited to this;

[0069] Place the first spacer ring 61a on the first lens 20 and connect the edge of the first spacer ring 61a to the fixed frame 40a. Before placing the first spacer ring 61a, glue can be applied locally to the connection area between the first spacer ring 61a, the first lens 20, and the fixed frame 40a.

[0070] Place the optical waveguide element 10 on the first spacer ring 61a and connect the edge of the optical waveguide element 10 to the fixed frame 40a. Before placing the optical waveguide element 10, local glue can be applied to the connection area between the optical waveguide element 10, the first spacer ring 61a, and the fixed frame 40a.

[0071] Place the second spacer ring 61b on the optical waveguide element 10 and connect the edge of the spacer ring to the fixed frame 40a. Before placing the second spacer ring 61b, glue can be applied locally to the connection area between the second spacer ring 61b, the optical waveguide element 10, and the fixed frame 40a.

[0072] Place the second lens 30 on the second spacer ring 61b and connect the edge of the second lens 30 to the fixed frame 40a. Before placing the second lens 30, local glue can be applied to the connection area between the second lens 30, the second spacer ring 61b, and the fixed frame 40a.

[0073] Place the limiting part 63 on the second lens 30, with the edge of the concave surface of the second lens 30 tightly attached to the curved surface of the limiting part 63, and the edge end of the limiting part 63 is connected to the fixed frame 40a. Before placing the limiting part 63, the connection area between the limiting part 63 and the second lens 30 and the fixed frame 40a can be locally glued.

[0074] In some embodiments, the first lens 20 and the second lens 30 are both prescription optical lenses with adjustable focal lengths according to user needs, optical lenses with other functions, or optical lens sets comprising at least two lenses. In the embodiment of the present application, the first lens 20 and the second lens 30 are both prescription optical lenses with adjustable focal lengths.

[0075] In this way, the first lens 20, the optical waveguide element 10, and the second lens 30 are limited on the fixed frame 40a, and through the cooperation of the retaining edge 41, the limiting portion 63, the first spacer ring 61a, the second spacer ring 61b, and the packaging glue with the edge portions of the first lens 20, the optical waveguide element 10, and the second lens 30, the first lens 20, the optical waveguide element 10, and the second lens 30 can be firmly clamped on the fixed frame 40a.

[0076] In some embodiments, the optical waveguide element 10 can be a geometric waveguide or a diffractive waveguide. Diffractive waveguide technologies are categorized into surface relief grating waveguides and volume holographic grating waveguides. Diffractive waveguides utilize the diffraction effect of light, primarily employing a grating structure to modulate the light beam. The process principle of volume holographic waveguides is relatively simple, and the grating structure can be formed using laser interference exposure.

[0077] Surface relief grating is a process of carving peaks and valleys on the surface of a material through processes such as photolithography and etching, thereby achieving a periodic structure that can meet the required optical properties. In some embodiments, such as Figure 1As shown, the optical waveguide element 10 is a grating waveguide, comprising a substrate 11 and a grating 13 disposed on a surface of the substrate 11. Although not shown, the grating may include an in-coupling grating and an out-coupling grating, both of which are surface-relief gratings. The characteristic dimensions of the grating are in the nanometer range, comparable to the wavelength of light. After light is incident on the grating, it undergoes multiple levels of diffraction. The in-coupling grating and the out-coupling grating each comprise a plurality of optical microstructures (not shown) protruding from the substrate and spaced apart from each other. Each optical microstructure is columnar and has nanometer-scale dimensions. In some embodiments, the height of the optical microstructure is 80 nm to 200 nm, for example, 80 nm to 120 nm. Light emitted by the micro-projection system (optical engine) passes through the in-coupling grating, enters the substrate of the optical waveguide element 10, and propagates therein by total internal reflection. Finally, the out-coupling grating transmits the light to the human eye.

[0078] In some embodiments, the material of the fixing frame 40 a may be metal, plastic (eg, phenolic plastic), or rubber.

[0079] In some embodiments, the encapsulant may be a liquid encapsulant having properties such as high temperature resistance, high chemical resistance, and high resistance.

[0080] Example 2

[0081] Embodiment 2 of the present application provides an optical module. By providing a fixing frame 40a having a clamping portion, the various components of the optical module can be quickly and accurately fixed together, effectively avoiding the use of packaging glue to bond the various components of the optical module, which may cause difficulties and problems in the gluing process, and improving efficiency.

[0082] like Figure 3 As shown, the optical module 200 includes a first lens 20, an optical waveguide element 10, and a second lens 30 which are sequentially stacked and spaced apart from each other. Figure 4 The optical module further includes a fixed frame 40b, which is used to surround and limit the first lens 20, the optical waveguide element 10, and the second lens 30. The fixed frame 40a surrounds the periphery of the first lens 20, the optical waveguide element 10, and the second lens 30. The inner wall of the fixed frame 40b is provided with a limiting element to limit the edge of the first lens 20, the optical waveguide element 10, and the second lens 30.

[0083] like Figure 4 and Figure 5As shown, the fixed frame 40b includes a first frame portion 42a and a second frame portion 42b that are rotatably connected, and the first frame portion 42a and the second frame portion 42b can be closed or opened with respect to each other. In the embodiment of the present application, one end of the first frame portion 42a and one end of the second frame portion 42b are connected by elements such as tenons or hinges, and the other end of the first frame portion 42a and the other end of the second frame portion 42b are locked and connected by locking elements 70 such as magnetic elements. When the first frame portion 42a and the second frame portion 42b are closed to each other, the first frame portion 42a and the second frame portion 42b form a closed circle. In the embodiment of the present application, the cross-sections of the first frame portion 42a and the second frame portion 42b are both semicircular, but are not limited to this.

[0084] It is understandable that the locking element 70 is not limited to a magnetic element, and may be other locking elements 70 as long as it can lock the first frame portion 42a and the second frame portion 42b into one, such as a locking element 70 that cooperates with a buckle and a hole.

[0085] See also Figure 3 and Figure 6 As shown, the inner walls of the first frame portion 42a and the inner walls of the second frame portion 42b are respectively provided with limiting elements to limit the edges of the first lens 20, the optical waveguide component 10, and the second lens 30. The limiting elements include a first retaining portion 62 and a second retaining portion 64 spaced apart from each other. The edge of the optical waveguide component 10 is retained between the first retaining portion 62 and the second retaining portion 64. The spacing between the first retaining portion 62 and the second retaining portion 64 is equal to the thickness of the edge of the optical waveguide component 10.

[0086] like Figure 3 As shown, in the embodiment of the present application, the first lens 20 is a convex lens with one convex surface and the other flat surface, wherein the convex surface faces away from the optical waveguide element 10. The second lens 30 is a concave lens with one concave surface and the other flat surface, wherein the concave surface faces away from the optical waveguide element 10.

[0087] See also Figure 3 and Figure 6 As shown, the limiting element further includes a third clamping portion 66 and a fourth clamping portion 68 . The third clamping portion 66 is located on a side of the first clamping portion 62 away from the second clamping portion 64 , and the fourth clamping portion 68 is located on a side of the second clamping portion 64 away from the first clamping portion 62 .

[0088] The edge of the first lens 20 is limited between the first holding portion 62 and the third holding portion 66, and the distance between the first holding portion 62 and the third holding portion 66 is equal to the thickness of the edge of the first lens 20. Figure 3As shown, in the embodiment of the present application, since the first lens 20 is a convex lens, in order to conveniently limit the edge of the first lens 20 between the first clamping portion 62 and the third clamping portion 66, the edge portion of the first lens 20 can be partially removed to form a clamping block portion 21 with uniform thickness located between the first clamping portion 62 and the third clamping portion 66.

[0089] A latching slot 31 is defined on the edge of the second lens 30. The latching slot 31 cooperates with the fourth latching portion 68, and the fourth latching portion 68 can extend into the latching slot 31. It will be appreciated that, in order to cooperate with the fourth latching portion 68 on the first frame portion 42a and the second frame portion 42b, the latching slots 31 are defined at opposite ends of the second lens 30.

[0090] It can be understood that the edge of the optical waveguide element 10 constrained between the first clamping portion 62 and the second clamping portion 64 is the non-visible area of the optical waveguide element 10, the edge of the second lens 30 with the clamping slot 31 is the non-visible area of the second lens 30, and the edge of the first lens 20 is the non-visible area of the first lens 20.

[0091] In the embodiment of the present application, the surface (plane) of the first lens 20 facing the optical waveguide component 10 contacts and connects to the first retaining portion 62. Thus, the width of the first retaining portion 62 determines the distance between the first lens 20 and the optical waveguide component 10. The surface (plane) of the second lens 30 facing the optical waveguide component 10 contacts and connects to the second retaining portion 64. Thus, the width of the second retaining portion 64 determines the distance between the second lens 30 and the optical waveguide component 10.

[0092] In this way, when the first frame portion 42a and the second frame portion 42b are locked and closed with each other, the first lens 20, the optical waveguide component 10 and the second lens 30 are restricted between the first frame portion 42a and the second frame portion 42b, and the first lens 20, the optical waveguide component 10 and the second lens 30 are firmly fixed to the fixed frame 40b by the limiting elements on the fixed frame 40b.

[0093] Combine Figure 5 and Figure 6 The assembly and fixing method of the optical module 200 of the embodiment of the present application includes:

[0094] The first lens 20, the optical waveguide element 10, and the second lens 30 are placed on the first frame portion 42a, with one end edge of the optical waveguide element 10 sandwiched between the first clamping portion 62 and the second clamping portion 64, one end edge of the first lens 20 sandwiched between the first clamping portion 62 and the third clamping portion 66, and the fourth clamping portion 68 extending into the clamping groove 31 at one end of the second lens 30.

[0095] The second frame portion 42b is then rotated to close over the first frame portion 42a, and the first and second frame portions 42a, 42b are locked together using the locking element 70. At this point, the retaining elements on the second frame portion 42b engage and engage the other end edges of the first lens 20, optical waveguide element 10, and second lens 30. Specifically, the other end edge of the optical waveguide element 10 is sandwiched between the first retaining portion 62 and the second retaining portion 64, the other end edge of the first lens 20 is located between the first retaining portion 62 and the third retaining portion 66, and the fourth retaining portion 68 extends into the retaining groove 31 at the other end of the second lens 30. In this manner, the first lens 20, optical waveguide element 10, and second lens 30 are securely secured to the fixed frame 40b.

[0096] In some embodiments, the material of the fixing frame 40 a may be metal or plastic, but is not limited thereto.

[0097] Example 3

[0098] Embodiment 3 of the present application provides an optical module. By setting a fixed frame and setting through holes in the fixed frame and the lens to install locking elements, the various components of the optical module can be fixed together quickly and accurately, effectively avoiding the use of packaging glue to bond the various components of the optical module, which leads to difficulties and problems in the gluing process, and improving efficiency.

[0099] like Figure 7 As shown, the optical module 300 includes a first lens 20, an optical waveguide element 10, and a second lens 30, which are sequentially stacked and spaced apart from each other. The optical module also includes a fixed frame 40c, which is used to retain the optical waveguide element 10. The fixed frame 40c is positioned at the edge of the optical waveguide element 10 and is provided with a retaining groove 440 to receive the edge of the optical waveguide element 10, thereby retaining the optical waveguide element 10.

[0100] In some embodiments, the fixed frame 40c includes a first frame portion 44a and a second frame portion 44b. The first frame portion 44a and the second frame portion 44b are located at opposite ends of the optical waveguide component 10. The first frame portion 44a and the second frame portion 44b each define a retaining groove 440. The edge of the optical waveguide component 10 is retained in the retaining groove 440 of the first frame portion 44a and the retaining groove 440 of the second frame portion 44b.

[0101] like Figure 7 and Figure 8As shown, the first frame portion 42a and the second frame portion 42b each have a through-hole 442. Correspondingly, the edges of the first lens 20 and the second lens 30 each have a through-hole. The first lens 20 has two through-holes 22 corresponding to the through-holes 442 in the first frame portion 42a and the through-holes 442 in the second frame portion 42b, respectively. The second lens 30 has two through-holes 32 corresponding to the through-holes 442 in the first frame portion 42a and the through-holes 442 in the second frame portion 42b, respectively. The through-hole 442 in the first frame portion 42a penetrates the first frame portion 42a along the stacking direction of the first lens 20, the optical waveguide element 10, and the second lens 30. The through-hole 442 in the second frame portion 42b penetrates the second frame portion 42b along the stacking direction of the first lens 20, the optical waveguide element 10, and the second lens 30. The through-hole 22 in the first lens 20 penetrates the first lens 20 along the stacking direction of the first lens 20, the optical waveguide element 10, and the second lens 30. The through hole 32 of the second lens 30 penetrates the second lens 30 along the stacking direction of the first lens 20 , the optical waveguide element 10 , and the second lens 30 .

[0102] like Figure 7 and Figure 8 As shown, the optical module also includes a locking element 80. The locking element 80 includes a first locking element 81 and a second locking element 82. The first locking element 81 locks the first lens 20, the first frame portion 42a, and the second lens 30 into one body, and the second locking element 82 locks the first lens 20, the second frame portion 42b, and the second lens 30 into one body. In the embodiment of the present application, the first locking element 81 and the second locking element 82 may respectively include screws and nuts, or include bolts and nuts, etc. The two through holes 22 of the first lens 20 are respectively aligned with the through holes 442 of the first frame portion 42a and the second frame portion 42b, and the two through holes 32 of the second lens 30 are respectively aligned with the through holes 442 of the first frame portion 42a and the second frame portion 42b. The screw or bolt of the first locking element 81 is sequentially passed through the through-hole 22 of the first lens 20, the through-hole 442 of the first frame portion 42a, and the through-hole 32 of the second lens 30. The nut of the first locking element 81 is then tightened on both ends of the bolt, or one end of the screw, so that the first frame portion 42a is fixedly clamped between the first lens 20 and the second lens 30. The screw or bolt of the second locking element 82 is sequentially passed through the through-hole 22 of the first lens 20, the through-hole 442 of the second frame portion 42b, and the through-hole 32 of the second lens 30. The nut of the second locking element 82 is then tightened on both ends of the bolt, or one end of the screw, so that the second frame portion 42b is fixedly clamped between the first lens 20 and the second lens 30.

[0103] In this way, the first lens 20 , the optical waveguide element 10 , and the second lens 30 are stacked and fixed in sequence. The aperture size of the through hole 442 can be adjusted according to the size of the first lens 20 and the second lens 30 .

[0104] It is understood that the through holes 32 of the first lens 20 and the second lens 30 are both located in the non-visible area of the edge portion. In some embodiments, considering the aperture position that can be tolerated by the through-hole processing of the first lens 20 and the second lens 30, the aperture of the through hole 442 can be 3 to 5 mm.

[0105] Along the stacking direction of the first lens 20, the optical waveguide element 10 and the second lens 30, the width of the first frame portion 42a and the width of the second frame portion 42b are both equal to the distance between the first lens 20 and the second lens 30. The distance between the first lens 20 and the optical waveguide element 10 and the distance between the second lens 30 and the optical waveguide element 10 can be adjusted by adjusting the opening position of the retaining groove 440 on the first frame portion 42a and the second frame portion 42b.

[0106] The assembly and fixing method of the optical module 300 of the embodiment of the present application includes:

[0107] The first frame portion 42a and the second frame portion 42b are respectively placed at opposite ends of the edge portion of the optical waveguide element 10, and the edge portion of the optical waveguide element 10 extends into the retaining grooves 440 of the first frame portion 42a and the second frame portion 42b;

[0108] The first lens 20 is placed on one side of the first frame portion 42a and the second frame portion 42b, and the second lens 30 is placed on the other side of the first frame portion 42a and the second frame portion 42b respectively;

[0109] Align the two through holes 22 of the first lens 20 with the through holes 442 of the first frame part 42a and the second frame part 42b respectively, and align the two through holes 32 of the second lens 30 with the through holes 442 of the first frame part 42a and the second frame part 42b respectively, and pass a bolt or a screw through the through hole 22 of the first lens 20, the through hole 442 of the first frame part 42a and the through hole 32 of the second lens 30 in sequence, and then use two nuts to lock the two ends of the bolt, or use a nut to lock the end of the screw; pass another bolt or a screw through the other through hole 22 of the first lens 20, the through hole 442 of the second frame part 42b and the other through hole 32 of the second lens 30 in sequence, and then use two nuts to lock the two ends of the bolt, or use a nut to lock the end of the screw.

[0110] In this way, the first lens 20, the first frame part 42a and the second lens 30 are locked together, and the first lens 20, the second frame part 42b and the second lens 30 are locked together. At this time, the first lens 20 contacts and connects the first frame part 42a and the second frame part 42b, and the second lens 30 contacts and connects the first frame part 42a and the second frame part 42b.

[0111] The embodiment of the present application also provides an augmented reality glasses, which can superimpose virtual images on real scenes, so that users can see a mixture of virtual reality and the real world. Figure 9 As shown, the augmented reality glasses 400 include the optical module 100 / 200 / 300 and a projection system 420. The projection system 420 is located on one side of the optical module 100 / 200 / 300 to generate a light beam to be projected into the optical module 100 / 200 / 300.

[0112] Projection system 420 is used to generate a projection beam carrying image information. It can be an LCOS micro-projection system, a DLP micro-projection system, an OLED micro-projection system, a Micro LED micro-projection system, or an LBS laser scanning micro-projection system. LCOS and DLP micro-projection systems typically include an LCOS or DMD micro-display, an LED or laser backlight, and an optical lens system. OLED and Micro LED micro-projection systems typically include an OLED or Micro LED micro-display and an optical lens system. LBS laser scanning micro-projection systems typically include a laser light source, a collimation system, and a MEMS scanning device or a scanning fiber. The light beam generated by projection system 420 is then transmitted and expanded by optical modules 100 / 200 / 300 before entering the human eye and being perceived.

[0113] In the embodiment of the present application, the projection system 420 is located on the side of the optical waveguide component where the first lens 20 is disposed. Thus, the light of the projection system passes through the first lens 20, is guided by the optical waveguide component 10, and then passes through the second lens 30 to be projected into the human eye.

[0114] The optical module of the embodiment of the present application fixes the first lens 20, the optical waveguide element 10, and the second lens 30, which are stacked in sequence, into one piece by providing a fixing frame, a limiting element, and one of a packaging glue and a locking element that cooperate with each other. This effectively avoids the difficulties and problems in the gluing process caused by using adhesives such as packaging glue to bond the various components of the optical module, and improves the assembly efficiency of the optical module.

[0115] It should be noted that the above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application; the embodiments of the present application and the features of the embodiments can be combined with each other unless there is a conflict. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

Claims

1. An optical module, characterized in that: The optical module includes: A first lens, an optical waveguide element, and a second lens stacked in sequence; a fixed frame connected to at least an edge portion of the optical waveguide element; a limiting element, disposed on a side of the fixing frame facing the optical waveguide element; and The packaging glue or the locking element is provided on the fixing frame, and the packaging glue or the locking element cooperates with the limiting element and the fixing frame to fix the first lens, the optical waveguide element and the second lens into one body.

2. The optical module according to claim 1, wherein: When the optical module includes the packaging glue; The fixing frame connects the first lens, the optical waveguide element and the edge ends of the second lens; The limiting element includes a limiting portion, and the limiting portion is fixed to the fixing frame by the packaging glue; The fixing frame is provided with a rib corresponding to the first lens, the first lens, the optical waveguide element and the second lens stacked in sequence are clamped between the rib and the limiting portion, the sealing glue is provided in the connection area between the rib and the first lens, and the sealing glue is provided in the connection area between the limiting portion and the second lens.

3. The optical module according to claim 2, wherein: The shape of the surface of the rib facing the first lens matches the shape of the surface of the first lens facing away from the optical waveguide element, so that the edge of the first lens is attached to the rib; The shape of the surface of the limiting portion facing the second lens matches the shape of the surface of the second lens facing away from the optical waveguide element, so that the edge of the second lens is attached to the limiting portion.

4. The optical module according to claim 2, wherein: The limiting element further includes a first spacer ring and a second spacer ring. The first spacer ring is sandwiched between the optical waveguide element and the first lens, and the second spacer ring is sandwiched between the optical waveguide element and the second lens.

5. The optical module according to claim 4, wherein: The packaging glue is provided in the connection area between the first spacer ring and the optical waveguide element and in the connection area between the first spacer ring and the first lens; The packaging glue is disposed in a connection area between the second spacer ring and the optical waveguide element and in a connection area between the second spacer ring and the second lens.

6. The optical module according to claim 1, wherein: When the optical module includes the locking element; The fixed frame includes a first frame portion and a second frame portion that are rotatably connected, one end of the first frame portion is connected to one end of the second frame portion, and the other end of the first frame portion is connected to the other end of the second frame portion via the locking element; The first frame portion and the second frame portion jointly surround peripheries of the first lens, the optical waveguide element, and the second lens.

7. The optical module according to claim 6, wherein: The limiting elements are respectively provided on the first frame portion and the second frame portion. The limiting elements include a first clamping portion and a second clamping portion spaced apart from each other. The edge of the optical waveguide element is clamped between the first clamping portion and the second clamping portion.

8. The optical module according to claim 7, wherein: The limiting element further includes a third clamping portion, the third clamping portion is located on a side of the first clamping portion away from the second clamping portion, and the third clamping portion is spaced apart from the first clamping portion; The edge of the first lens is sandwiched between the first holding portion and the third holding portion, and the first holding portion is sandwiched between the first lens and the optical waveguide element.

9. The optical module according to claim 7, wherein: The limiting element further includes a fourth clamping portion, the fourth clamping portion is located on a side of the second clamping portion away from the first clamping portion, and the fourth clamping portion is spaced apart from the first clamping portion; A card slot is formed on the edge of the second lens, and the card slot cooperates with the fourth holding portion. The fourth holding portion extends into the card slot, and the second holding portion is sandwiched between the second lens and the optical waveguide element.

10. The optical module according to claim 1, wherein: When the optical module includes the locking element; The fixing frame includes a first frame portion and a second frame portion that are separated, wherein the first frame portion and the second frame portion are respectively located at opposite ends of the optical waveguide element, and the optical waveguide element is sandwiched between the first frame portion and the second frame portion; The locking element includes a first locking element and a second locking element. The first locking element locks the first lens, the first frame part and the second lens into one body, and fixes the first frame part between the first lens and the second lens. The second locking element locks the first lens, the second frame part and the second lens into one body, and fixes the second frame part between the first lens and the second lens.

11. The optical module according to claim 10, wherein: The first locking element includes a screw or a nut and a nut, the screw or the nut passes through the first lens, the first frame part and the second lens, and the nut is locked at the end of the screw or the nut, thereby locking the first lens, the first frame part and the second lens into one; the second locking element includes a screw or a nut and a nut, the screw or the nut passes through the first lens, the second frame part and the second lens, and the nut is locked at the end of the screw or the nut, thereby locking the first lens, the second frame part and the second lens into one.

12. The optical module according to claim 10, wherein: The first frame portion and the second frame portion are respectively provided with a retaining groove, and opposite ends of the edge portion of the optical waveguide element are respectively limited in the retaining groove of the first frame portion and the retaining groove of the second frame portion.

13. An augmented reality glasses, characterized in that: The optical module comprises a projection system and the optical module according to any one of claims 1 to 12, wherein the projection system is used to generate a light beam to be projected onto the optical module.

Images