Die of optical module and optical module

Abstract

The utility model provides a mold of an optical module and the optical module, and relates to the technical field of optics. The mold comprises a first cavity and a second cavity; the first cavity comprises a first bottom surface, and the first bottom surface comprises a surrounding surface; the second cavity comprises a second opening and a second bottom surface which are oppositely arranged, a convex part is arranged on the second bottom surface, and a gap is formed between the convex part and the inner wall of the second cavity; the first cavity and the second cavity are filled with the light-transmitting material, and the light-transmitting material is cured to form a first component and a second component of the optical module respectively; the light-transmitting material is filled in a space, directly facing the surrounding surface, in the first cavity and is used for forming a first connecting part of the first assembly; the gap is filled with the light-transmitting material to form a second connecting part of the second assembly, and the light-transmitting material wraps the protruding part to form a cavity of the second assembly. The mold can be used for manufacturing an optical module with a cavity, so that the weight of the optical module can be effectively reduced, and the consumption of a light-transmitting material is reduced.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to a mold of an optical module and an optical module. Background Art

[0002] AR is the abbreviation of Augmented Reality, which is a technology that combines virtual information with the real world. In AR, users can see virtual objects or scenes generated by the program, which can interact with objects or scenes in the real world. The optical module is one of the core components of AR products. It is mainly responsible for the imaging of AR products. Through the optical module, users can see both the real external world and virtual information.

[0003] The main body of the optical module is made of transparent materials. At present, a transparent substrate is usually used as the raw material and the main body of the optical module is made by mechanical processing. However, the mechanical processing method has problems such as high cost, long time consumption, and large material waste, which is not conducive to mass production. Utility Model Content

[0004] The purpose of the present application is to overcome the defects of the prior art and to provide a mold of an optical module and an optical module to solve the problems in the prior art.

[0005] To solve the above problems, a first aspect of an embodiment of the present application provides a mold of an optical module, comprising a first cavity and a second cavity;

[0006] The first cavity includes a first bottom surface, and the first bottom surface includes a surrounding surface;

[0007] The second cavity comprises a second opening and a second bottom surface which are arranged opposite to each other, a protrusion is arranged on the second bottom surface, a protrusion direction of the protrusion faces the second opening, and a gap is formed between the protrusion and the inner wall of the second cavity;

[0008] The first cavity and the second cavity are both used to inject molten light-transmitting material, and the light-transmitting material fills the first cavity and the second cavity and solidifies to form a first component and a second component of the optical module respectively;

[0009] The light-transmitting material fills the space in the first cavity opposite to the surrounding surface to form a first connecting portion; the light-transmitting material fills the gap to form a second connecting portion of the second component, and the light-transmitting material wraps the protrusion to form a cavity of the second component; wherein,

[0010] The first connection portion of the first component is connected to the second connection portion of the second component, and the first component is used to cover the cavity.

[0011] A second aspect of an embodiment of the present application provides an optical module, which is applied to an AR device, and includes a first component and a second component; the first component and the second component are made of the mold as described above;

[0012] The first component includes the first connecting portion,

[0013] The second component comprises a second connecting portion and a cavity; wherein,

[0014] The first connecting portion is connected to the second connecting portion, and the first assembly is covered on the cavity.

[0015] The beneficial effects of this application include:

[0016] The mold of the optical module includes a first cavity and a second cavity, wherein the first cavity and the second cavity are filled with molten light-transmitting material, and when the light-transmitting materials in the first cavity and the second cavity are solidified, the first component and the second component of the optical module are formed. The first component made of the first cavity includes a first connecting portion, and the second component made of the second cavity includes a second connecting portion and a cavity. The first connecting portion of the first component is connected to the second connecting portion of the second component, and the first component is covered on the cavity.

[0017] The mold can produce an optical module with a cavity, thereby effectively reducing the weight of the optical module and reducing the consumption of light-transmitting materials. In addition, since the optical module is produced by mold forming, the manufacturing cost and time are greatly reduced, and it is also suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of a first phantom is shown;

[0020] Figure 2 A schematic diagram of a second phantom is shown;

[0021] Figure 3 A schematic diagram of a first group of entities is shown;

[0022] Figure 4 A schematic diagram of a second assembly is shown;

[0023] Figure 5 A schematic diagram of a mold of an optical module in which a first mold body and a second mold body are an integrated structure is shown;

[0024] Figure 6 A schematic diagram of assembling a first mold body and a first matching piece is shown;

[0025] Figure 7 A schematic diagram of assembling a second mold body and a second matching piece is shown;

[0026] Figure 8 A schematic diagram of an optical module in which a light source is arranged inside an incident part is shown;

[0027] Fig. 9 A schematic diagram showing an optical module in which a light source is arranged on an outer bottom surface;

[0028] Fig.10 A schematic diagram of an AR device is shown.

[0029] Description of main component symbols:

[0030] 1-first mold body; 10-first cavity; 11-first opening; 12-first bottom surface; 121-surrounding surface; 122-convex surface; 13-first side surface; 2-second mold body; 20-second cavity; 21-second opening; 22-second bottom surface; 221-annular surface; 222-setting surface; 23-convex portion; 231-upper end surface; 232-lower end surface; 233-joining surface; 234-third side surface; 24-gap; 25-second side surface; 30-first group body; 31-first connecting portion part; 311-first mounting surface; 32-second reflecting surface; 33-emitting surface; 34-protective layer; 40-second assembly; 41-second connecting part; 411-inner side surface; 412-second mounting surface; 42-cavity; 421-bottom end surface; 422-first reflecting surface; 43-packaging layer; 441-outer side surface; 442-outer bottom surface; 45-incident part; 46-light source; 50-injection port; 61-first matching piece; 62-second matching piece; 70-wearing piece; 100-optical module. DETAILED DESCRIPTION

[0031] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In this application, a spherical surface refers to a portion of a spherical surface, wherein the curvature is equal at each point on the spherical surface;

[0034] An aspherical surface is a surface that cannot be described by the definition of a spherical surface. The curvature of an aspherical surface is inconsistent.

[0035] Free-form surface refers to a complex, irregular continuous surface without a rotational symmetry axis.

[0036] An inclined surface refers to a regular curved surface that is not perpendicular to a reference surface, such as a conical surface.

[0037] In order to clearly understand the relationship between the first assembly 30 and the second assembly 40 and the first cavity 10 and the second cavity 20, the following description is made accordingly:

[0038] The first assembly 30 is formed by filling the first cavity 10 with a light-transmitting material and solidifying it; the first connecting portion 31 is formed by filling the space in the first cavity 10 opposite to the surrounding surface 121 with a light-transmitting material and solidifying it; the second reflecting surface 32 is formed by attaching the light-transmitting material to the convex surface 122 and solidifying it; the first mounting surface 311 is formed by attaching the light-transmitting material to the surrounding surface 121 and solidifying it;

[0039] The second component 40 is formed by filling the second cavity 20 with a light-transmitting material and solidifying it; the second connecting portion 41 is formed by filling the gap 24 in the second cavity 20 with a light-transmitting material and solidifying it; the cavity 42 is formed by wrapping the protrusion 23 with the light-transmitting material and solidifying it; the bottom end surface 421 is formed by the light-transmitting material fitting the upper end surface 231 of the protrusion 23 and solidifying it; the first reflecting surface 422 is formed by the light-transmitting material fitting the connecting surface 233 and solidifying it; the inner side surface 411 is formed by the light-transmitting material fitting the third side surface 234 of the protrusion 23 and solidifying it; the second mounting surface 412 is formed by the light-transmitting material fitting the annular surface 221 of the second bottom surface 22 and solidifying it.

[0040] Among them, the optical module 100 and the mold for making the optical module 100 provided in the present application can effectively reduce the consumption of production materials and reduce the weight of the entire module by hollowing out the center of the main body, thereby realizing the miniaturization and lightweight design of the optical module 100.

[0041] Example

[0042] In this embodiment, a mold of an optical module 100 is provided, including a first cavity 10 and a second cavity 20 .

[0043] like Figure 1 As shown, the first cavity 10 includes a first opening 11 and a first bottom surface 12 that are oppositely arranged. The first bottom surface 12 includes a surrounding surface 121 and a convex surface 122, the surrounding surface 121 is coplanar with the first bottom surface 12, and the surrounding surface 121 is arranged around the convex surface 122, wherein the convex direction of the convex surface 122 is opposite to the first opening 11. Figure 1 In the figure, a dotted line is used to indicate the plane where the first opening 11 is located.

[0044] like Figure 2 As shown, the second cavity 20 comprises a second opening 21 and a second bottom surface 22 which are arranged opposite to each other. A protrusion 23 is arranged on the second bottom surface 22, and the protrusion 23 faces the second opening 21. There is a gap 24 between the protrusion 23 and the inner wall of the second cavity 20. Figure 2 In the figure, a dotted line is used to indicate the plane where the second opening 21 is located.

[0045] The first cavity 10 and the second cavity 20 are both used to inject molten light-transmitting materials, which may include PMMA (polymethyl methacrylate), PC (polycarbonate), resin, glass, and the like.

[0046] Reference Figure 3 and Figure 4 The light-transmitting material fills the first cavity 10 and the second cavity 20 and is solidified to form the first assembly 30 and the second assembly 40 of the optical module 100 .

[0047] The light-transmitting material fills the space in the first cavity 10 opposite to the surrounding surface 121 to form the first connecting portion 31 of the first component 30 ; the light-transmitting material fills the gap 24 to form the second connecting portion 41 of the second component 40 , and the light-transmitting material wraps the protrusion 23 to form the cavity 42 of the second component 40 .

[0048] The first assembly 30 and the second assembly 40 are connected via the first connection portion 31 and the second connection portion 41, and the first assembly 30 is used to cover the cavity 42. After the first assembly 30 and the second assembly 40 are assembled, the main body of the optical module 100 is obtained.

[0049] To facilitate understanding of the structures of the first cavity 10 and the second cavity 20 , the surface structures on the first cavity 10 and the second cavity 20 are described below.

[0050] The first bottom surface 12 and the second bottom surface 22 are both planes.

[0051] The convex surface 122 includes a spherical surface, an aspherical surface, a free-form surface, or an inclined surface that is not perpendicular to the first bottom surface 12, or one or a combination of these. In this embodiment, the convex surface 122 is a spherical surface.

[0052] like Figure 2 As shown, the raised portion 23 includes an upper end face 231, a lower end face 232 and a connecting face 233, the upper end face 231 is parallel to the lower end face 232 and the two are disposed at both ends of the raised direction of the raised portion 23, wherein the raised direction of the raised portion 23 is consistent with its own height direction, and the height direction of the raised portion 23 is also consistent with the depth direction of the second cavity 20.

[0053] The lower end surface 232 is coplanar with the second bottom surface 22, the connecting surface 233 is arranged around the upper end surface 231, and the connecting surface 233 is connected to the upper end surface 231. In the protruding direction of the protruding portion 23, the protruding portion 23 does not protrude from the plane where the upper end surface 231 is located. Specifically, the second bottom surface 22 includes an annular surface 221 and a setting surface 222, the annular surface 221 surrounds the outer periphery of the setting surface 222, the annular surface 221 and the setting surface 222 are coplanar with the second bottom surface 22, and the lower end surface 232 and the setting surface 222 are the same surface.

[0054] The connecting surface 233 includes a spherical surface, an aspherical surface, a free-form surface, or an inclined surface that is not perpendicular to the upper end surface 231, or one or a combination of these. In this embodiment, the connecting surface 233 is an inclined surface.

[0055] like Figure 1 As shown, the first cavity 10 includes a first side surface 13, and the first side surface 13 is located between the first opening 11 and the first bottom surface 12. The first opening 11 and the first bottom surface 12 are disposed on both sides of the depth direction of the first cavity 10. The first side surface 13 can be arranged parallel to the depth direction of the first cavity 10.

[0056] like Figure 2As shown, the second cavity 20 includes a second side surface 25, and the second side surface 25 is located between the second opening 21 and the second bottom surface 22. The second opening 21 and the second bottom surface 22 are disposed on both sides of the depth direction of the second cavity 20. The second side surface 25 can be arranged parallel to the depth direction of the second cavity 20.

[0057] The protrusion 23 includes a third side surface 234 , which is located between the connecting surface 233 and the lower end surface 232 , and the upper end surface 231 , the connecting surface 233 and the third side surface 234 are sequentially connected. The third side surface 234 is arranged parallel to the depth of the second cavity 20 .

[0058] A gap 24 with uniform thickness is formed between the second side surface 25 and the third side surface 234, and the gap 24 is an annular structure. In some embodiments, the second side surface 25 and the third side surface 234 are both cylindrical surfaces, and the second side surface 25 and the third side surface 234 are coaxially arranged.

[0059] Since the connecting surface 233 is not arranged parallel to the depth direction of the second cavity 20, and the structure of the connecting surface 233 is complex (the connecting surface 233 is a spherical surface, an aspherical surface, a free-form surface or an inclined surface, one or a combination of these), in order to facilitate the forming of the connecting surface 233, in this embodiment, the distance between the upper end surface 231 and the lower end surface 232 is smaller than the distance between the plane where the second opening 21 is located and the second bottom surface 22, that is, the height of the protrusion 23 is smaller than the depth of the second cavity 20.

[0060] The sizes of the first bottom surface 12 and the upper end surface 231 of the protrusion 23 can be set as needed. In this embodiment, the area of ​​the first bottom surface 12 is larger than the area of ​​the upper end surface 231; and the distance between the two points farthest apart on the first bottom surface 12 is larger than the distance between the two points farthest apart on the upper end surface 231. It can be understood that the outer diameter of the largest circumscribed circle of the first bottom surface 12 is larger than the outer diameter of the largest circumscribed circle of the upper end surface 231.

[0061] In other embodiments, the area of ​​the first bottom surface 12 is not greater than the area of ​​the upper end surface 231 ; and the distance between the two farthest points on the first bottom surface 12 is not greater than the distance between the two farthest points on the upper end surface 231 .

[0062] like Figure 1 and Figure 2 As shown, the mold includes a first mold body 1 and a second mold body 2, a first cavity 10 is arranged on the first mold body 1, and a second cavity 20 is arranged on the second mold body 2. Among them, a plurality of first cavities 10 are arranged on the first mold body 1, and a plurality of second cavities 20 are arranged on the second mold body 2. The plurality can be one or more.

[0063] In this embodiment, a plurality of first cavities 10 arranged in a straight line or in an array are provided on the first mold body 1, and a plurality of second cavities 20 arranged in a straight line or in an array are provided on the second mold body 2. The array arrangement includes a circular array arrangement or a rectangular array arrangement.

[0064] In order to facilitate the flow of molten light-transmitting material so that the light-transmitting material fills all the first cavities 10 on the first mold body 1 and all the second cavities 20 on the second mold body 2, on the first mold body 1, adjacent first cavities 10 are interconnected; and on the second mold body 2, adjacent second cavities 20 are interconnected.

[0065] In some embodiments, for the first mold body 1, along the direction of the first preset trajectory, the volume of the first cavity 10 remains unchanged, gradually increases, gradually decreases, or changes alternately; for the second mold body 2, along the direction of the second preset trajectory, the volume of the second cavity 20 remains unchanged, gradually increases, gradually decreases, or changes alternately. The first preset trajectory and the second preset trajectory can be a straight trajectory, a circular trajectory, etc.

[0066] The first mold body 1 has a plurality of first cavities 10 with different volumes, and the second mold body 2 has a plurality of second cavities 20 with different volumes, so as to facilitate the manufacture of first assembly bodies 30 and second assembly bodies 40 of different sizes, thereby obtaining optical modules 100 of different sizes.

[0067] like Figure 5 As shown, the first mold body 1 and the second mold body 2 are an integrated structure, and the first cavity 10 corresponds to the second cavity 20. The first cavity 10 is connected to the corresponding second cavity 20, the plane where the first opening 11 is located is opposite to or coincides with the plane where the corresponding second opening 21 is located, and the convex surface 122 is coaxially arranged with the corresponding protrusion 23. In this embodiment, the first opening 11 and the corresponding second opening 21 have the same size and shape.

[0068] In order to allow the molten light-transmitting material to be injected into the first cavity 10 and the second cavity 20, the mold further includes an injection port 50 for injecting the molten light-transmitting material, wherein the injection port 50 is connected to the first cavity 10 and the second cavity 20. After the light-transmitting material fills the first cavity 10 and the second cavity 20 and solidifies, an integrated semi-finished model is obtained. Subsequently, the semi-finished model is cut along the plane where the first opening 11 and the plane where the second opening 21 are located to obtain the first assembly 30 and the second assembly 40. It should be noted that when the plane where the first opening 11 in the mold is located coincides with the plane where the corresponding second opening 21 is located, the first assembly 30 and the second assembly 40 can be obtained by cutting the semi-finished model once.

[0069] Reference Figure 5In this embodiment, the injection port 50 is disposed between the first mold body 1 and the second mold body 2. The first cavity 10 on the first mold body 1 and the corresponding second cavity 20 on the second mold body 2 have a gap between the first side surface 13 and the second side surface 25, and the gap constitutes the injection port 50.

[0070] In addition, the position of the injection port 50 can be set as needed. Specifically, the injection port 50 can be opened on the first mold body 1 or the second mold body 2. For example, the injection port 50 is opened on the first mold and passes through the surrounding surface 121 or the first side surface 13; or the injection port 50 is opened on the second mold and passes through the annular surface 221 or the second side surface 25.

[0071] It is mentioned above that the first mold body 1 and the second mold body 2 are an integrated structure. However, in other embodiments, the first mold body 1 and the second mold body 2 may also be a split structure.

[0072] When the first mold body 1 and the second mold body 2 adopt a split structure, the mold also includes a matching part. Figure 6 and Figure 7 As shown, there are two matching pieces, namely a first matching piece 61 and a second matching piece 62. The first matching piece 61 is used to cover the first opening 11, and the second matching piece 62 is used to cover the second opening 21. In order to reduce costs, the first matching piece 61 and the second matching piece 62 can both be flat plates.

[0073] For a mold in which the first mold body 1 and the second mold body 2 are split structures, the mold further includes a first injection hole and a second injection hole, both of which are used for injecting molten light-transmitting materials, the first injection hole is connected to the first cavity 10, and the second injection hole is connected to the second cavity 20. The first injection hole is opened on the first mold body 1 or the first matching piece 61, and the second injection hole is opened on the second mold body 2 or the second matching piece 62. For example, the first injection hole can be opened on the first side surface 13 of the first mold body 1, and the first injection hole penetrates two adjacent first side surfaces 13, so that the injected molten transparent material can flow into all the first cavities 10 on the first mold body 1; the second injection hole can be opened on the second side surface 25 of the second mold body 2, and the second injection hole penetrates two adjacent second side surfaces 25, so that the injected molten transparent material can flow into all the second cavities 20 on the second mold body 2. It should be noted that the first injection hole and the second injection hole are not shown in the figure.

[0074] In some other embodiments, the number of the matching piece is one, wherein the first mold body 1 and the second mold body 2 are disposed on two sides of the matching piece, and two opposite end surfaces of the matching piece are used to cover the first opening 11 and the second opening 21 respectively.

[0075] Since the first mold body 1 and the second mold body 2 are split structures, after the transparent material filled in the first mold body 1 and the second mold body 2 is solidified and formed, the first matching piece 61 and the second matching piece 62 are removed, and after demolding, the first assembly body 30 and the second assembly body 40 can be obtained without cutting.

[0076] Reference Figure 3 , Figure 4 and Figure 8 In the present embodiment, an optical module 100 is also proposed, including a first component 30 and a second component 40, wherein the second component 40 includes a second connecting portion 41 and a cavity 42. The first component 30 is connected to the second connecting portion 41, and the first component 30 is covered on the cavity 42. In order to reduce costs, in the present embodiment, the cavity 42 may be filled with dry air. In addition, in other embodiments, the cavity 42 may also be filled with other transparent media, such as dry carbon dioxide or inert gas, or filled with transparent solid materials or liquid materials. It should be noted that when a gas medium is used to fill the cavity 42, the dryness of the gas should be ensured to avoid fog or condensed water inside the cavity 42 and affect the display effect.

[0077] The first assembly 30 includes a first connection portion 31 and a second reflection surface 32. The first connection portion 31 includes a first mounting surface 311 disposed around the second reflection surface 32. The first connection portion 31 is used to connect to the second connection portion 41. The first connection portion 31 and the second connection portion 41 can be connected by bonding, welding, clamping, etc.

[0078] The second reflective surface 32 protrudes toward the cavity 42. The second reflective surface 32 includes a spherical surface, an aspherical surface, a free-form surface, or an inclined surface that is not perpendicular to the first mounting surface 311, or a combination of these.

[0079] The inner wall of the cavity 42 includes a bottom surface 421 and a first reflection surface 422. The bottom surface 421 is located at the bottom of the cavity 42. The first reflection surface 422 is connected to the bottom surface 421, and the first reflection surface 422 is arranged around the bottom surface 421. The first reflection surface 422 includes a spherical surface, an aspherical surface, a free-form surface, or an inclined surface that is not perpendicular to the bottom surface 421, or a combination of these.

[0080] In this embodiment, the second reflective surface 32 is protruded opposite to the bottom end surface 421 .

[0081] In order to achieve the reflection effect, a reflection structure is provided on both the first reflection surface 422 and the second reflection surface 32, wherein the reflection structure includes a reflection layer or a reflection film. The reflection layer or the reflection film can be formed on the first reflection surface 422 and the second reflection surface 32 by evaporating silver, aluminum or other metal alloys. In this embodiment, the difference between the layer and the film lies in the thickness, wherein the thickness of the layer is greater than the thickness of the film, and can be regarded as a film if it is less than the preset thickness, and can be regarded as a layer if it is not less than the preset thickness.

[0082] like Figure 4 As shown, the second connection portion 41 includes an inner side surface 411 and a second mounting surface 412 connected to each other. The inner side surface 411 is located in the cavity 42, and the inner side surface 411, the first reflective surface 422 and the bottom end surface 421 are connected in sequence. The second mounting surface 412 is located at an end of the inner side surface 411 away from the first reflective surface 422, and the second mounting surface 412 is located outside the cavity 42 and is arranged around the cavity 42.

[0083] In this embodiment, the first connection portion 31 and the second connection portion 41 are connected via the first mounting surface 311 and the second mounting surface 412. Specifically, the first mounting surface 311 and the second mounting surface 412 may be connected by bonding or welding.

[0084] In some other embodiments, a first connection structure may be provided on the first mounting surface 311, and a second connection structure for being fixedly connected to the first connection structure may be provided on the second mounting surface 412, so that the first mounting surface 311 and the second mounting surface 412 can be connected through the cooperation between the first connection structure and the second connection structure. One of the first connection structure and the second connection structure is a groove, and the other is a protrusion for inserting into the groove; or one of the first connection structure and the second connection structure is a card slot, and the other is a buckle for card slot engagement. The first connection structure and the second connection structure are not limited to the above examples.

[0085] like Figure 3 As shown, in order to allow light to be emitted, the first assembly 30 includes an exit surface 33, and the exit surface 33 and the second reflection surface 32 are disposed on both sides of the first assembly 30. The exit surface 33 is formed by solidifying the first opening 11 of the first cavity 10 filled with transparent material and covering it.

[0086] like Figure 8 As shown, in order to protect the exit surface 33 to prevent the exit surface 33 from being worn or scratched, a transparent protective layer 34 is provided on the exit surface 33 , and the protective layer 34 can be made of glass, resin or other materials.

[0087] In order to avoid interference from external light or light leakage, an opaque encapsulation layer 43 is provided on the outer surface of the second assembly 40. The outer surface of the second assembly 40 includes an outer side surface 441 and an outer bottom surface 442. The outer side surface 441 is formed by solidifying the second opening 21 of the second cavity 20 filled with a transparent material, and the outer bottom surface 442 is formed by solidifying the transparent material adhered to the second side surface 25. The encapsulation layer 43 and the protective layer 34 can be connected as one.

[0088] In this embodiment, the second component 40 includes an incident portion 45 away from the first component 30. The incident portion 45 is formed by filling a space between the upper end surface 231 and the second opening 21 with a transparent material and solidifying it.

[0089] The incident portion 45 is provided with a mounting structure for mounting a light source 46 . The light source 46 is located outside the cavity 42 and does not protrude from the bottom end surface 421 .

[0090] The mounting structure includes a surface structure, a groove structure or a step structure.

[0091] Reference Figure 8 In some embodiments, a mounting groove is provided in the incident portion 45, and the light source 46 can be directly embedded in the mounting groove.

[0092] Reference Fig. 9 In some embodiments, the light source 46 can be directly fixed to the outer bottom surface 442 of the second assembly 40 by bonding, screw connection, etc.

[0093] In some embodiments, the outer bottom surface 442 or the outer side surface 441 of the incident portion 45 is provided with a step structure, and the light source 46 is snap-connected or screw-connected to the step structure.

[0094] The light source 46 may be a micro display, which can improve the graphic source, such as text, video and other information. The light source 46 includes a circuit board, which is used to connect external devices and realize the transmission of signals and electric energy.

[0095] Microdisplays may include Micro-LED (Micro Light-Emitting Diode), uLED (Micro Light Emitting Diode), Micro-oled (Micro Organic Light-Emitting Diode), LCoS (Liquid Crystal On Silicon), LCD (Liquid Crystal Display), DMD (Digital Micromirror Device) / DLP (Digital Light Processing) or LBS (Laser Beam Scanning), etc., or any combination of the above products.

[0096] The light generated by the light source 46 is emitted into the cavity 42 through the bottom surface 421, wherein the first reflection surface 422 provided with a reflection structure reflects the light for the first time, and makes the light reflected onto the second reflection surface 32 provided with a reflection structure; the second reflection surface 32 reflects the incident light for a second time, and finally makes the light emitted through the exit surface 33 and the protective layer 34 in sequence, so that the user can view the corresponding image.

[0097] In this embodiment, an AR device is also proposed, including a wearable piece 70 and the optical module 100 mentioned above, wherein the wearable piece 70 is used to be worn on the user's head, and the light from the real world and the light emitted by the optical module 100 are projected into the user's eyes, thereby achieving an AR effect of near-eye display.

[0098] like Fig.10 As shown, in this embodiment, the wearing piece 70 includes a glasses frame.

[0099] In other embodiments, the wearing piece 70 may also include a helmet or other device.

[0100] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0101] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A mold for an optical module, characterized in that: It comprises a first cavity (10) and a second cavity (20); The first cavity (10) comprises a first bottom surface (12), and the first bottom surface (12) comprises a surrounding surface (121); The second cavity (20) comprises a second opening (21) and a second bottom surface (22) which are arranged opposite to each other, a protrusion (23) is arranged on the second bottom surface (22), a protrusion direction of the protrusion (23) faces the second opening (21), and a gap (24) is provided between the protrusion (23) and the inner wall of the second cavity (20); The first cavity (10) and the second cavity (20) are both used to inject molten light-transmitting material, the light-transmitting material fills the first cavity (10) and the second cavity (20) and solidifies to form a first component (30) and a second component (40) of the optical module (100); The light-transmitting material fills the space in the first cavity (10) opposite to the surrounding surface (121) to form a first connecting portion (31); the light-transmitting material fills the gap (24) to form a second connecting portion (41) of the second component (40); the light-transmitting material wraps the protrusion (23) to form a cavity (42) of the second component (40); wherein: The first connecting portion (31) of the first assembly (30) is connected to the second connecting portion (41) of the second assembly (40), and the first assembly (30) is used to cover the cavity (42).

2. The mold of the optical module according to claim 1, characterized in that: The first cavity (10) further comprises a first opening (11), the first opening (11) being arranged opposite to the first bottom surface (12); the first bottom surface (12) further comprises a convex surface (122); the surrounding surface (121) is coplanar with the first bottom surface (12), and the surrounding surface (121) is arranged around the convex surface (122); the convex direction of the convex surface (122) is opposite to the first opening (11).

3. The mold of the optical module according to claim 2, characterized in that: The convex surface (122) includes a spherical surface, an aspherical surface, a free-form surface, or an inclined surface that is not perpendicular to the first bottom surface (12), one or a combination of these. The raised portion (23) comprises an upper end surface (231), a lower end surface (232) and a connecting surface (233); the upper end surface (231) is parallel to the lower end surface (232) and the two are respectively arranged at two ends of the raised direction of the raised portion (23); the lower end surface (232) is coplanar with the second bottom surface (22); the connecting surface (233) is arranged around the upper end surface (231) and is connected to the upper end surface (231); wherein the connecting surface (233) comprises a spherical surface, an aspherical surface, a free-form surface, or an inclined surface that is not perpendicular to the upper end surface (231), one of or a combination of these.

4. The mold of the optical module according to claim 3, characterized in that: The first cavity (10) comprises a first side surface (13), and the first side surface (13) is located between the first opening (11) and the first bottom surface (12); The second cavity (20) comprises a second side surface (25), and the second side surface (25) is located between the second opening (21) and the second bottom surface (22); The raised portion (23) comprises a third side surface (234), and the third side surface (234) is located between the connecting surface (233) and the lower end surface (232); wherein a gap (24) with uniform thickness is formed between the second side surface (25) and the third side surface (234), and the gap (24) is an annular structure.

5. The mold of the optical module according to claim 3, characterized in that: The distance between the upper end surface (231) and the lower end surface (232) is smaller than the distance between the plane where the second opening (21) is located and the second bottom surface (22); the area of ​​the first bottom surface (12) is larger than the area of ​​the upper end surface (231), and The distance between the two points on the first bottom surface (12) that are farthest apart is greater than the distance between the two points on the upper end surface (231) that are farthest apart.

6. The mold of the optical module according to claim 2, characterized in that: The invention comprises a first mold body (1) and a second mold body (2), wherein the first cavity (10) is arranged on the first mold body (1), and the second cavity (20) is arranged on the second mold body (2); wherein: The first mold body (1) is provided with a plurality of first cavities (10), and the second mold body (2) is provided with a plurality of second cavities (20); The first mold body (1) is provided with a plurality of the first cavities (10) arranged in a straight line or in an array; the second mold body (2) is provided with a plurality of the second cavities (20) arranged in a straight line or in an array; wherein: On the first mold body (1), adjacent first cavities (10) are connected to each other; and on the second mold body (2), adjacent second cavities (20) are connected to each other; For the first mold body (1), along the direction of the first preset trajectory, the volume of the first cavity (10) remains unchanged, gradually increases, gradually decreases, or changes alternately; For the second mold body (2), along the direction of the second preset trajectory, the volume of the second cavity (20) remains unchanged, gradually increases, gradually decreases, or changes alternately.

7. The mold of the optical module according to claim 6, characterized in that: The first cavity (10) corresponds to the second cavity (20) in a one-to-one manner; wherein, The first cavity (10) is connected to the corresponding second cavity (20), the first opening (11) is arranged opposite to or overlaps with the corresponding second opening (21), and the convex surface (122) is coaxially arranged with the corresponding raised portion (23); The mold further comprises an injection port (50), wherein the injection port (50) is used for injecting the molten light-transmitting material, and the injection port (50) is connected to the first cavity (10) and the second cavity (20); wherein: The injection port (50) is disposed between the first mold body (1) and the second mold body (2); or The injection port (50) is opened on the first mold body (1) or the second mold body (2).

8. The mold of the optical module according to claim 6, characterized in that: The first mold body (1) and the second mold body (2) are split structures; The mold further comprises a matching piece, wherein: The number of the matching pieces is two, namely a first matching piece (61) and a second matching piece (62), the first matching piece (61) is used to cover the first opening (11), and the second matching piece (62) is used to cover the second opening (21); or The number of the matching piece is one, the first mold body (1) and the second mold body (2) are respectively arranged on two sides of the matching piece, and the two opposite end surfaces of the matching piece are used to cover the first opening (11) and the second opening (21) respectively; The mold further comprises a first injection hole and a second injection hole, both of which are used for injecting the molten light-transmitting material, the first injection hole being connected to the first cavity (10), and the second injection hole being connected to the second cavity (20); wherein the first injection hole is provided on the first mold body (1) or the first matching piece (61), and the second injection hole is provided on the second mold body (2) or the second matching piece (62).

9. An optical module, applied to an AR device, characterized in that: The invention comprises a first component (30) and a second component (40); the first component (30) and the second component (40) are made of a mold according to any one of claims 1 to 8; The first component (30) includes the first connecting portion (31), The second assembly (40) includes a second connecting portion (41) and a cavity (42); wherein: The first connecting portion (31) is connected to the second connecting portion (41), and the first assembly (30) is covered on the cavity (42).

10. The optical module according to claim 9, characterized in that: The first assembly (30) further comprises a second reflecting surface (32), and the first connecting portion (31) comprises a first mounting surface (311) arranged around the second reflecting surface (32); The second reflecting surface (32) protrudes toward the cavity (42); wherein the second reflecting surface (32) comprises a spherical surface, an aspherical surface, a free-form surface, or an inclined surface that is not perpendicular to the first mounting surface (311), one or a combination of these. A reflective structure is provided on the second reflective surface (32); the inner wall of the cavity (42) comprises a bottom end surface (421) and a first reflective surface (422); the bottom end surface (421) is located at the bottom of the cavity (42); the first reflective surface (422) is connected to the bottom end surface (421), and the first reflective surface (422) is arranged around the bottom end surface (421); wherein the first reflective surface (422) comprises a spherical surface, an aspherical surface, a free-form surface, or an inclined surface that is not perpendicular to the bottom end surface (421), or one or a combination of the above; The second reflecting surface (32) is protruding opposite to the bottom end surface (421); A reflection structure is arranged on the first reflection surface (422).

11. The optical module according to claim 10, characterized in that: The second connecting portion (41) comprises a connected inner side surface (411) and a second mounting surface (412); The inner side surface (411) is located in the cavity (42), and the inner side surface (411), the first reflection surface (422) and the bottom end surface (421) are connected in sequence; The second mounting surface (412) is located at an end of the inner side surface (411) away from the first reflecting surface (422), and the second mounting surface (412) is located outside the cavity (42) and is arranged around the cavity (42); wherein the first mounting surface (311) is connected to the second mounting surface (412); The first mounting surface (311) and the second mounting surface (412) are connected by bonding or welding; or A first connection structure is arranged on the first mounting surface (311), and a second connection structure for being fixedly connected to the first connection structure is arranged on the second mounting surface (412).

12. The optical module according to claim 11, characterized in that: One of the first connection structure and the second connection structure is a groove, and the other is a protrusion for inserting into the groove; or One of the first connection structure and the second connection structure is a slot, and the other is a buckle for being engaged with the slot.

13. The optical module according to claim 10, characterized in that: The first component (30) comprises an exit surface (33), wherein the exit surface (33) and the second reflection surface (32) are respectively disposed on two sides of the first component (30); wherein a transparent protective layer (34) is disposed on the exit surface (33); The outer surface of the second group body (40) is provided with a light-proof encapsulation layer (43).

14. The optical module according to any one of claims 10 to 13, characterized in that: The second assembly (40) comprises an incident portion (45) away from the first assembly (30), and a mounting structure for mounting a light source (46) is disposed on the incident portion (45); wherein the light source (46) is located outside the cavity (42) and does not protrude from the bottom end surface (421); The mounting structure includes a surface structure, a groove structure or a step structure.

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