Lens barrel, lens, multiple lens groups and camera modules

Abstract

The present invention relates to a lens barrel, which has a first end and a second end opposite to each other, a cavity is formed between the first end and the second end, the lens barrel includes a light shielding portion and a light-transmitting portion connected to the light shielding portion, the cavity is formed by the light shielding portion, the light-transmitting portion has a light-entering surface and a light-emitting surface for external light to pass through, the light-emitting surface is located at the first end, so that external light can be incident from the light-entering surface and emitted from the light-emitting surface located at the first end. The above-mentioned lens barrel can be used to assemble to form a multi-group lens; it has a light-transmitting portion, and when forming a multi-group lens, it can cure glue by light without a long baking process, and the glue curing time can be shortened to 40 seconds to 60 seconds, thereby ensuring the stability of the lens quality yield and production efficiency. A lens, a multi-group lens and a camera module having the above-mentioned lens barrel are also proposed.

Description

Technical Field

[0001] The present invention relates to the technical field of camera modules, and in particular to a lens barrel, a lens having the lens barrel and a plurality of lens groups, and also provides a camera module having the plurality of lens groups. Background Art

[0002] The lens is an important part of the camera module and directly affects the imaging quality of the camera module. In multiple groups of lenses, the lens AA (active alignment) process is used to compensate for the manufacturing tolerance / assembly tolerance of optical system components, thereby improving the imaging quality and mass production yield of the entire optical system.

[0003] When using AA technology, Figure 1 As shown, after the two adjacent groups (first lens 1 and second lens 2) find the best imaging position, they need to be reliably connected together. The commonly used technology is to use glue 3 for bonding, which is to use thermosetting glue for one dispensing and then use UV glue for a second dispensing. Figure 2 As shown, currently, thermosetting glue is used for the first dispensing and an air escape hole 31 needs to be left; after the thermosetting glue is baked and cured, UV glue is used for the second dispensing to seal the air escape hole 31 to ensure the reliability of the bonding and prevent dust from entering.

[0004] The defects of the above method include: the lens barrel in the lens is usually a black plastic part, which can easily lead to abnormal lens quality when the thermosetting adhesive is baked and cured; and the thermosetting adhesive needs to have an air escape hole, which requires secondary dispensing. Summary of the invention

[0005] Based on this, it is necessary to propose a multi-group lens to solve the problem that baking and curing glue during assembly of multi-group lenses easily leads to abnormal lens quality. A camera module having the multi-group lens is also proposed. A lens barrel and a lens are also proposed.

[0006] A lens barrel has a first end and a second end opposite to each other, a cavity is formed between the first end and the second end, the lens barrel comprises a light shielding portion and a light transmitting portion connected to the light shielding portion, the cavity is formed by the light shielding portion, the light transmitting portion has a light incident surface and a light emitting surface for external light to pass through, the light emitting surface is located at the first end, so that external light can be incident from the light incident surface and emitted from the light emitting surface located at the first end.

[0007] The lens barrel can be assembled to form a lens, which can then be used to assemble multiple groups of lenses. The lens has a light-transmitting portion, and when forming multiple groups of lenses, the glue can be cured by light without the need for a long baking process. The glue curing time can be shortened to 40 seconds to 60 seconds or even lower, thereby ensuring the stability of the lens quality yield and production efficiency.

[0008] In one embodiment, the lens barrel includes a side wall connecting the first end and the second end, and at least one of the first end, the second end and the side wall is provided with the light incident surface. The light incident surface can be arranged at the first end or the second end, or at a position between the first end and the second end, and the light incident on the light incident surface can be emitted from the light emitting surface through direct or refracted light and irradiated on the glue, thereby curing the glue.

[0009] In one embodiment, the light incident surface is a rotating surface, and the angle between the generatrix of the light incident surface and the axis of the lens barrel is 0-90 degrees. Within the above angle range, the light incident from the light incident surface can be directly or refracted and emitted from the light emitting surface and irradiate the glue, thereby curing the glue.

[0010] In one embodiment, the light incident surface and the light emitting surface are respectively arranged at the first end and the second end. The light incident surface and the light emitting surface are located at opposite sides of the lens barrel, and the light can be emitted toward the glue substantially along the axis direction of the lens barrel. The light energy emitted toward the glue is relatively large, which is conducive to shortening the curing time of the glue.

[0011] In one embodiment, the light incident surface is parallel to the light emitting surface, and the light incident surface and the light emitting surface are perpendicular to the axis of the lens barrel. At this time, the light path between the light incident surface and the light emitting surface is parallel to the axis of the lens barrel. In this way, the light can be emitted perpendicularly to the light emitting surface and directed toward the glue, and the light energy directed toward the glue is larger, which is conducive to shortening the curing time of the glue.

[0012] In one embodiment, the lens barrel includes a side wall connecting the first end and the second end, and the light incident surface is disposed on the side wall. The light incident surface can be disposed on the side wall of the lens barrel, and the light incident from the light incident surface is refracted and then emitted from the light emitting surface and irradiates the glue, thereby curing the glue.

[0013] In one embodiment, the light-transmitting portion is nested with the light-shielding portion, and the light-shielding portion is used to prevent light from entering the hollow portion of the lens barrel, and to prevent non-imaging light from entering and irradiating the imaging surface, thereby reducing stray light and ensuring high-quality imaging effects.

[0014] In one embodiment, the light-transmitting portion surrounds the light-shielding portion and covers at least a portion of the outer circumference of the light-shielding portion. The light-transmitting portion surrounds the light-shielding portion for a circle, so that the light-transmitting portion constitutes the outer ring of the lens barrel, and the light-shielding portion constitutes the inner ring of the lens barrel. When the two lenses are bonded and assembled, since the glue is arranged at the outer ring of the lens barrel and close to the edge between the second lens, it is more convenient to apply the glue. At the same time, the light-shielding portion is the inner ring of the lens barrel, and the effect of shielding light when the lens is imaging is better.

[0015] In one embodiment, the light shielding part is a hard part, and the light transmitting part is a flexible part. The outer ring of the lens barrel is made of a flexible material with a good hand feel; the inner ring of the lens barrel is made of a hard material to support the first lens.

[0016] In one of the embodiments, the light-transmitting portion and the light-shielding portion are an integral part formed by a two-color injection molding process; or the light-transmitting portion is detachably mounted on the outside of the light-shielding portion. The lens barrel of the first lens can directly form the light-transmitting portion by a two-color injection molding process, allowing light to pass through, so that glue that can be cured by light can be used, avoiding long-term baking, and ensuring the quality of the lens. In addition, the injection molding process is high, which helps to improve the production yield of the assembled lens. When the light-shielding portion and the light-transmitting portion can also be formed into an integral part by assembly, the light-shielding portion can also be a hard material, and the light-transmitting portion can be a flexible material. The light-transmitting portion can be detachably mounted on the outside of the light-shielding portion, thereby obtaining a light-transmitting portion that allows light to pass through, so that glue that can be cured by light can be used, avoiding long-term baking, and ensuring the quality of the lens.

[0017] In one embodiment, the shading portion is a black shading portion. Black has a better shading effect and is a common color of lens barrels, which conforms to the aesthetics of users.

[0018] A lens comprises the above-mentioned lens barrel, wherein a lens is arranged in the lens barrel. The above-mentioned lens can be assembled to form the first lens in the above-mentioned embodiment, and then used to assemble to form a multi-group lens. Since the lens barrel of the lens has a light-transmitting portion, when forming a multi-group lens, the glue can be cured by light without the need for a long baking process, and the glue curing time can be shortened to 40 seconds to 60 seconds, thereby ensuring the stability of the lens quality yield and production efficiency.

[0019] A multi-group lens includes a first lens and a second lens bonded by glue, wherein the first lens is the aforementioned lens, and the glue is a glue that can be cured by light. After the glue is set between the first lens and the second lens, the glue can be cured by light, so that a long baking process is not required, and the glue curing time can be shortened to 40 seconds to 60 seconds, thereby ensuring the stability of the lens quality yield and production efficiency.

[0020] In one embodiment, the glue is in a closed ring shape. In the conventional technology, an air escape hole needs to be left during the first glue dispensing and baking curing, which results in the need for a second glue dispensing. In the embodiment of the present invention, the glue is cured by light, and the glue can be applied in a closed ring shape, without the need for an air escape hole, and accordingly, no second glue dispensing is required. Since no second glue dispensing is required, the process is saved and the production efficiency is improved.

[0021] In one embodiment, the glue is evenly applied on the circumference. The glue is evenly applied on the circumference. For example, the glue may be in a ring shape. Since there are no air holes on the glue and it is evenly applied, the force is evenly applied on the circumference, thereby avoiding the relative position deviation of the first lens and the second lens, and ensuring the relative position accuracy of the two.

[0022] In one embodiment, the glue is a glue that can be cured by UV or visible light. The glue can be UV glue or visible light curing glue, which can be cured by irradiation of visible light, avoiding the use of a baking process.

[0023] A multi-group lens includes a first lens and a second lens bonded by glue, wherein the first lens and the second lens respectively include a lens barrel, at least one of the lens barrels includes a light-transmitting portion that allows a preset light to pass through and irradiate the glue, and the glue is cured by ultraviolet light and / or light of other wavelengths. After the glue is set between the first lens and the second lens, the glue can be cured by light irradiation, so that a long baking process is not required, and the glue curing time can be shortened to 40 seconds to 60 seconds, thereby ensuring the stability of the lens quality yield and production efficiency.

[0024] A camera module includes the multi-group lens. When manufacturing the multi-group lens, since the lens barrel includes a light-transmitting portion that allows preset light to pass through and irradiate the glue, after the glue is set between the first lens and the second lens, the glue can be cured by light, so that a long baking process is not required, and the glue curing time can be shortened to 40 seconds to 60 seconds, so that the lens quality yield stability is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic cross-sectional diagram of a multi-group lens in conventional technology.

[0026] Figure 2 for Figure 1 The shown diagram is a schematic cross-sectional view of multiple groups of lenses along the AA direction after one dispensing of glue.

[0027] Figure 3 FIG. 4 is a schematic cross-sectional view of a plurality of lens groups according to an embodiment of the present invention.

[0028] Figure 4 for Figure 3 The shown diagram is a cross-sectional view of multiple groups of lenses along the BB direction after one dispensing of glue.

[0029] Figure 5 FIG. 4 is a schematic cross-sectional view of a multi-group lens according to another embodiment of the present invention.

[0030] Figure 6 FIG. 4 is a schematic cross-sectional view of a group lens according to another embodiment of the present invention.

[0031] The components in the figure are marked as follows:

[0032] 1. First lens; 2. Second lens; 3. Glue; 31. Air escape hole; 100. Multi-group lens; 10. First lens; 110. Lens barrel; 101. Object side end; 102. Image side end; 103. Side wall; 112. Light-transmitting part; 1121. Light-entering surface; 1122. Light-exiting surface; 113. Light-shielding part; 120. First lens; 20. Second lens; 210. Second lens; 30. Glue;

[0033] 100', multiple group lenses; 10', first lens; 102', image side end; 20', second lens; 210', second lens; 220', lens barrel; 221', light-transmitting portion; 2211', light-incident surface; 2212', light-exiting surface; 222', light-shielding portion; 30', glue. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0035] In the description of the present invention, 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 invention 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 limiting the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0040] As described in the background technology, in the traditional multi-group lens, after dispensing once, the thermosetting glue needs to be cured by a baking process, and the baking time is usually more than 30 minutes, or even up to two hours, which easily leads to abnormal lens quality. To solve the above problem, an embodiment of the present invention proposes a multi-group lens, and the multi-group lens of the embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0041] like Figure 3 FIG. 1 is a schematic cross-sectional view of a multi-group lens 100 according to an embodiment of the present invention. Figure 3 As shown, the multi-group lens 100 includes a first lens 10 and a second lens 20 bonded by glue 30, wherein the glue 30 is a glue that can be cured by light, and the first lens 10 has a light-transmitting portion 112 through which light can pass and irradiate the glue 30, and a light-shielding portion 113 connected to the light-transmitting portion 112. Figure 4As shown, after the glue 30 is set between the first lens 10 and the second lens 20 of the multi-group lens 100 of the embodiment of the present invention, the glue 30 can be cured by light, so that a baking process is not required, thereby ensuring the stability of the lens quality yield and production efficiency.

[0042] The glue 30 is used to support the first lens 10 and the second lens 20 after curing, and to keep the relative position between the two at the relative position determined by the active calibration. The glue 30 can be cured by light, and the specific type is not limited. For example, the glue 30 can be UV glue, which can be cured by UV light; for example, the glue 30 can be glue 30 that is cured by light of other wavelengths, such as visible light curing glue, which can be cured by visible light.

[0043] The light-transmitting portion 112 allows light to pass through, and it only needs to have a certain light transmittance, that is, the light-transmitting portion 112 does not need to have a 100% light transmittance. Preferably, the light-transmitting portion 112 can be set as a fully transparent portion, a semi-transparent portion, etc.

[0044] For ease of understanding, in the embodiment of the present invention, a multi-group lens 100 including two upper and lower lenses is used as an example for description, but it should be understood that the multi-group lens 100 of the present application is not limited to having only two upper and lower lenses, and may also have more than two lenses. As long as one of the two adjacent lenses has the above-mentioned light-transmitting portion 112.

[0045] like Figure 3 As shown, the first lens 10 includes a lens barrel 110 and a first lens 120 disposed in the lens barrel 110. The lens barrel 110 is a hollow structure with two ends open, having a first end and a second end relative to each other, and a cavity is formed between the first end and the second end, wherein the light shielding portion 113 surrounds the above-mentioned cavity, and the first lens 120 is installed in the cavity. Specifically, the first end is the object side end 101, and the second end is the image side end 102. In the embodiment of the present invention, the object side refers to the side of the lens close to the object when in use. The image side refers to the side of the lens away from the object when in use, close to the imaging surface. In this embodiment, the number of the first lens 120 is one, but it should be noted that the embodiment of the present invention is not limited to this, and the number of the first lens 120 can also be multiple. The second lens 20 includes one or more second lenses 210, and the second lens 210 and the first lens 120 together constitute an optical system that can be imaged.

[0046] The lens barrel 110 of the first lens 10 includes a light-transmitting portion 112, and the light-transmitting portion 112 has a light-incoming surface 1121 for a preset light to enter, and a light-emitting surface 1122, and the light-emitting surface 1122 is located at the image side end 102. Figure 3As shown, after the external light L enters from the light incident surface 1121, it can be emitted from the image side end 102. Since the glue 30 is located between the image side end 102 of the first lens 10 and the object side end 101 of the second lens 20, the external light can be irradiated on the glue 30 through the light-transmitting portion 112. When applying the glue 30, the glue 30 can be applied on the light emitting surface 1122, and then the first lens 10 and the second lens 20 are connected; or the glue 30 can be applied at a position on the second lens 20 corresponding to the light emitting surface 1122, and then the first lens 10 and the second lens 20 are connected.

[0047] For the above-mentioned multi-group lens 100, after setting the glue 30 between the first lens 10 and the second lens 20, the glue 30 can be cured by light, so that a long baking process is not required. The curing time of the glue 30 can be shortened to 40 seconds to 60 seconds, thereby ensuring the stability of the lens quality yield and production efficiency.

[0048] The specific position of the light incident surface 1121 is not limited, as long as the light can be incident on and directed toward the light emitting surface 1122. In one example, the light incident surface 1121 is located at the object side end 101 of the lens barrel 110, the light incident surface 1121 is parallel to the light emitting surface 1122, and both are perpendicular to the axis X of the lens barrel 110. At this time, the light path between the light incident surface 1121 and the light emitting surface 1122 is parallel to the axis X of the lens barrel 110. In this way, the light can be emitted perpendicular to the light emitting surface 1122 and directed toward the glue 30, and the light energy directed toward the glue 30 is large, which is conducive to shortening the curing time of the glue 30.

[0049] It can be understood that the light incident surface 1121 can also be provided at a position between the object side end 101 and the image side end 102 of the lens barrel 110. Specifically, the lens barrel 110 includes a side wall 103 connecting the first end and the second end, and the light incident surface 1121 is provided on the side wall 103. For example, the lens barrel 110 is generally cylindrical, and the light incident surface 1121 can be provided on the cylindrical side surface of the lens barrel 110, and in this case, the optical path between the light incident surface 1121 and the light emitting surface 1122 forms an acute angle with the axis of the lens barrel 110.

[0050] The light incident surface 1121 may also be provided at the object side end 101 of the lens barrel 110. That is, the light incident surface 1121 and the light emitting surface 1122 are located at the same end of the lens barrel 10. The light incident from the light incident surface 1121 may be emitted from the light emitting surface 1122 after being refracted.

[0051] Furthermore, in the above-mentioned different arrangement positions of the light incident surface 1121, the light incident surface 1121 is a rotation surface formed by rotating a line segment around the axis of the lens barrel 110. The light incident surface 1121 can be arranged at a variety of angles. When specifically arranged, the angle between the generatrix of the light incident surface 1121, i.e., the rotation surface, and the axis X of the lens barrel 110 can be in the range of 0-90 degrees. More specifically, as Figure 3As shown, when the included angle between the generatrix M of the light incident surface 1121 and the axis of the lens barrel 110 is 0 degrees, the generatrix M of the light incident surface 1121 is parallel to the axis of the lens barrel 110, and the light incident surface 1121 extends along the axis of the lens barrel 110. Figure 5 As shown, when the included angle between the generatrix of the light incident surface 1121 and the axis of the lens barrel 110 is 90 degrees, the light incident surface 1121 extends in a direction perpendicular to the axis of the lens barrel 110 , and at this time, the light incident surface 1121 is arranged at the object side end 101 .

[0052] In addition, the object side end 101 of the lens barrel 110 and the position between the object side end 101 and the image side end 102 of the lens barrel 110 can be provided with the aforementioned light incident surface 1121. In this way, the precision requirement for the position of the light source during illumination is relatively low, but it can also ensure that the glue 30 is illuminated.

[0053] In addition, the light incident surface 1121 is not limited to being a rotation surface, and may also be an irregular surface, or a part of a rotation surface.

[0054] In one embodiment, the lens barrel 110 further includes a light shielding portion 113 fixedly connected to the light-transmitting portion 112, and the light-transmitting portion 112 and the light-shielding portion 113 are nested. The light-shielding portion 113 does not allow light to pass through, and can block light when the lens is imaging to ensure the imaging effect, so that the lens barrel 110 does not need to be equipped with a light-shielding element. The light-shielding portion 113 is specifically a black light-shielding portion 113. The black light-shielding effect is better; and black is a common color of the lens barrel in the lens, which conforms to the user's aesthetics. The nested setting here includes two situations: the light-transmitting portion 112 and the light-shielding portion 113 are integrally formed or separately formed.

[0055] Furthermore, the light-transmitting portion 112 surrounds the light-shielding portion 113 and completely covers the outer circumferential surface of the light-shielding portion 113. Figure 3 As shown, the light-transmitting portion 112 surrounds the light-shielding portion 113, which can be understood as the light-transmitting portion 112 is sleeved on the outside of the light-shielding portion 113, so that the light-transmitting portion 112 constitutes the outer ring of the lens barrel 110, and the light-shielding portion 113 constitutes the inner ring of the lens barrel 110. The glue 30 is arranged at a position close to the edge between the outer ring of the lens barrel 110 and the second lens 20, which is more convenient for applying the glue 30. At the same time, the light-shielding portion 113 is the inner ring of the lens barrel 110, and the effect of shielding light is better when the lens is imaging.

[0056] In another embodiment, if Figure 5As shown, the light-transmitting portion 112 surrounds the light-shielding portion 113, but only covers part of the outer circumferential surface of the light-shielding portion 113. Specifically, along the axis of the lens barrel 110, the light-shielding portion 113 includes a large diameter portion and a small diameter portion, and the outer diameter of the large diameter portion is greater than the outer diameter of the small diameter portion, so that the outer circumferential surface of the light-shielding portion 113 is stepped, and the light-transmitting portion 112 covers the small diameter portion of the light-shielding portion 113. In this way, the outer circumferential surface of the light-transmitting portion 112 and the outer circumferential surface of the large diameter portion of the light-shielding portion 113 together form the side wall 103 of the lens barrel 110. At this time, the light-transmitting portion 112 is only provided at the image side end 102, and the light-transmitting portion 112 does not extend to the object side end 101. At this time, the light incident surface 1121 is provided at the outer circumferential surface of the light-transmitting portion 112.

[0057] Furthermore, the light shielding portion 113 is a hard part made of a hard material, and the light transmitting portion 112 is a hard part made of a flexible material. The outer ring of the lens barrel 110 is a flexible material with a good hand feel; the inner ring of the lens barrel 110 is a hard material that can provide a good support for the first lens 120. In one example, the light shielding portion 113 is a black hard plastic, and the light transmitting portion 112 is a transparent silicone.

[0058] The lens barrel 110 is formed in any manner as described above with respect to the light-transmitting portion 112 and the light-shielding portion 113. In a preferred embodiment, the light-shielding portion 113 and the light-transmitting portion 112 are formed as an integral part by a two-color injection molding process. That is, the light-shielding portion 113 and the light-transmitting portion 112 are simultaneously formed by a two-color injection molding process. The two-color injection molding process refers to a molding process in which two different materials are injected into the same set of molds, thereby realizing that the molded parts are formed of two materials. The two different materials here mainly refer to different colors. In one example, the light-shielding portion 113 is a black opaque material, and the light-transmitting portion 112 is a colorless transparent material. The two different materials here also include the situation that the light-shielding portion 113 and the light-transmitting portion 112 are different in color and material. In one example, the light-shielding portion 113 is a black hard plastic, and the light-transmitting portion 112 is a transparent silicone.

[0059] In the above-mentioned multi-group lens 100, the lens of the first lens 10 adopts a two-color injection molding process to form a light-transmitting portion 112, allowing light to pass through, so that glue 30 that can be cured by light can be used, avoiding long-term baking and ensuring the quality of the lens.

[0060] In another embodiment, the light shielding portion 113 and the light transmitting portion 112 may also be assembled into an integral part, that is, the light transmitting portion 112 and the light shielding portion 113 are two independent parts, which are assembled together to form a complete lens barrel 110, wherein the light transmitting portion 112 is sleeved on the outside of the light shielding portion 113, and the two are interference fit.

[0061] Furthermore, when the light shielding portion 113 and the light transmitting portion 112 can also be assembled into an integral part, the light shielding portion 113 can also be made of a hard material, and the light transmitting portion 112 can be made of a flexible material, and the light transmitting portion 112 can be detachably mounted on the outside of the light shielding portion 113. The light transmitting portion 112 is flexible, so that it can be easily mounted on the outside of the light shielding portion 113, which is convenient for assembly. In addition, the outer ring of the lens barrel 110 is made of a flexible material, which has a good hand feel.

[0062] In another embodiment, the light shielding portion 113 and the light transmitting portion 112 may also be assembled into an integral piece, that is, the light transmitting portion 112 and the light shielding portion 113 are two independent parts, which are assembled together to form a complete lens barrel 110, wherein the light transmitting portion 112 is sleeved on the outside of the light shielding portion 113, and a filler such as an adhesive is provided between the two.

[0063] In another embodiment, the light-transmitting portion 112 is embedded in the light-shielding portion 113. For example, when the lens barrel 110 is manufactured by a two-color injection molding process, an annular light-transmitting portion 112 is formed, and light-shielding portions 113 are formed inside the inner circle of the annular light-transmitting portion 112 and outside the outer circle. The light-shielding portion 113 in the inner circle of the light-transmitting portion 112 forms a cavity of the lens barrel 110. Preferably, the glue 30 is arranged in a closed ring shape, and secondary dispensing is not required. The closed ring shape here refers to the glue 30 being continuously arranged along the circumferential direction surrounding the axis of the lens barrel 110 to form a closed structure connected end to end. The circumferential direction surrounding the axis of the lens barrel 110 is defined as the circumferential direction of the glue 30. The specific arrangement of the closed ring shape is not limited, and it can be Figure 4 The circular ring shown is continuously arranged along the circumference of the glue 30. The closed ring can also be a square ring or any polygonal ring.

[0064] In the conventional technology, a gas escape hole is required during the first dispensing and curing, which results in the need for a second dispensing. In the embodiment of the present invention, the glue 30 is cured by light. Figure 4 As shown, the glue 30 can be applied in a closed ring shape, so there is no need to set an air escape hole, and accordingly there is no need to perform secondary glue dispensing on the air escape hole. Since secondary glue dispensing is not required, the process is saved and the production efficiency is improved.

[0065] Furthermore, the glue 30 is evenly coated on its circumference. For example, the glue 30 is in a ring shape. Since there is no air hole on the glue 30 and it is evenly coated, the first lens 10 and the second lens 20 are evenly stressed on the circumference, thereby avoiding the relative position offset of the first lens 10 and the second lens 20, and ensuring the relative position accuracy of the two.

[0066] In addition, in the embodiment of the present invention, the glue 30 is cured by light, which has a greater tolerance for the glue dispensing method when applying the glue 30. Specifically, even if the glue 30 is accidentally applied with an air escape hole. After the glue 30 is cured by light, it can be refilled by a second glue dispensing method, such as using a thermosetting glue or a UV glue. However, since the amount of glue to be refilled is small, even if the baking process is used to cure the glue, the impact on the lens quality is relatively low.

[0067] like Figure 6 As shown, another embodiment of the present invention provides a multi-group lens 100 ′, which includes a first lens 10 ′ and a second lens 20 ′ bonded by glue 30 ′, wherein the glue 30 ′ is a glue that can be cured by light.

[0068] In this embodiment, the second lens 20' comprises a second lens 210' and a lens barrel 220', wherein the lens barrel 220' has a light-transmitting portion 221' through which light can pass and shine on the glue 30'. The lens barrel 220 is a hollow structure with two openings, and has a first end and a second end opposite to each other, wherein the first end is the object side end close to the first lens 10'.

[0069] The light-transmitting portion 221' is arranged on a side of the lens barrel 220' close to the first lens 10'. The light-incident surface 2211' of the light-transmitting portion 221' is arranged between the object-side end and the image-side end of the lens barrel 220'. The object-side end of the lens barrel 220' is an end close to the image-side end 102 of the first lens 10'. The angle between the generatrix M of the light-incident surface 2211' and the axis X of the lens barrel 220' is an acute angle. The light L incident from the light-incident surface 2211' can be emitted from the object-side end of the lens barrel 220' and irradiate the glue 30'. The light-emitting surface 2212' of the light-transmitting portion 221' is arranged at the first end of the first lens 10', i.e., the object-side end.

[0070] The second lens 20' further includes a light shielding portion 222' connected to the light transmitting portion 221', wherein the light transmitting portion 221' covers a portion of the outer circumference of the light shielding portion 222'. Figure 5 Of course, in other embodiments, the arrangement of the light-transmitting portion 221' on the second lens 20' covering the entire outer circumference of the light-shielding portion 222', that is, the arrangement of the light-transmitting portion 221' on the second lens 20' can be the same as Figure 3 In the illustrated embodiment, the configuration of the light-transmitting portion 112 on the first lens 10 is exactly the same.

[0071] Furthermore, in this embodiment, the light-transmitting portion 221 ′ and the light-shielding portion 222 ′ may be an integral part formed by a two-color injection molding process, or may be an integral part formed by assembly.

[0072] Further, on the basis of providing the light-transmitting portion 221' on the second lens 20', the structure of the first lens 10' can be completely the same as that of the first lens 10. That is, in this case, the first lens 10' and the second lens 20' are provided with light-transmitting portions respectively. When curing the glue 30', the choice of the incident direction of the light L is more flexible.

[0073] One embodiment of the present invention further provides a lens barrel, wherein the lens barrel 110 is the lens barrel 110 of the first lens 10 or the lens barrel 220' of the second lens 20' in the multi-group lens 100 or 100' in the aforementioned embodiment. The above-mentioned lens can be used to assemble to form the first lens 10 or the second lens 20' in the aforementioned embodiment, and then used to assemble to form a multi-group lens. The above-mentioned lens barrel has a light-transmitting portion, and when forming a multi-group lens, the glue can be cured by light without the need for a long baking process. The curing time of the glue 30 can be shortened to 40 seconds to 60 seconds, thereby ensuring the stability of the lens quality yield and production efficiency.

[0074] One embodiment of the present invention further provides a lens, which is the first lens 10 or the second lens 20' in the multi-group lens 100 in the above embodiment. The above lens and other lenses form a multi-group lens, and when forming the multi-group lens, the glue can be cured by light without the need for a long baking process.

[0075] An embodiment of the present invention further provides a camera module, including the multi-group lens 100 or the multi-group lens 100' of the aforementioned embodiment. Taking the manufacture of the multi-group lens 100 as an example, since the lens barrel 110 of the first lens 10 includes a light-transmitting portion 112 that allows a preset light to pass through and irradiate the glue 30, after the glue 30 is arranged between the first lens 10 and the second lens 20, the glue 30 can be cured by means of light, so that a long baking process is not required, and the curing time of the glue 30 can be shortened to 40 seconds to 60 seconds, so that the lens quality yield stability is better.

[0076] When a camera module is manufactured using a multi-group lens 100, at least one lens component is first connected to the motor, and the other lens components are attached afterwards and actively calibrated with the photosensitive component. For example, the second lens 20 in the multi-group lens 100 is first connected to the motor, and then the first lens 10 is installed on the second lens 20 that is already fixedly connected to the motor, and the glue 30 between the first lens 10 and the second lens 20 is cured by light. For example, for a threaded motor, the second lens 20 component can be screwed into the motor, and after the height is set, UV glue is used between the lens and the motor carrier to fix the second lens 20 and the motor carrier. For a non-threaded motor, the second lens 20 and the motor carrier can be connected at a fixed height by glue 30. It should be understood that the connection method between the second lens 20 and the motor carrier is not limited to this. The method of manufacturing the multi-group lens 100' is similar and will not be repeated.

[0077] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A multi-group lens, characterized in that: It comprises a first lens and a second lens bonded by glue, wherein the first lens and the second lens respectively comprise a lens barrel, at least one of the lens barrels is a hollow structure with two ends open, having a first end and a second end opposite to each other, a cavity formed between the first end and the second end, the lens barrel comprises a light-shielding portion and a light-transmitting portion connected to the light-shielding portion, the cavity is formed by the light-shielding portion, the light-transmitting portion is arranged around an optical axis of the first lens or the second lens, and along the radial direction of the lens barrel, the light-transmitting portion covers at least part of the light-shielding portion, the light-transmitting portion comprises a light-entry surface and a light-exiting surface for external light to pass through, the light-exiting surface is located at the second end, so that external light can be incident from the light-entry surface and exit from the light-exiting surface located at the second end and irradiate the glue to solidify the glue.

2. The multi-group lens according to claim 1, characterized in that: The lens barrel includes a side wall connecting the first end and the second end, and at least one of the first end, the second end and the side wall is provided with the light incident surface.

3. The multi-group lens according to claim 1, characterized in that: The light incident surface is a rotation surface, and the angle between the generatrix of the light incident surface and the axis of the lens barrel is 0-90 degrees.

4. The multi-group lens according to claim 3, characterized in that: The light incident surface and the light emitting surface are respectively arranged at the first end and the second end.

5. The multi-group lens according to claim 4, characterized in that: The light incident surface is parallel to the light emitting surface, and the light incident surface and the light emitting surface are perpendicular to the axis of the lens barrel.

6. The multi-group lens according to claim 3, characterized in that: The lens barrel includes a side wall connecting the first end and the second end, and the light incident surface is arranged on the side wall.

7. The multi-group lens according to claim 1, characterized in that: The light-transmitting portion and the light-shielding portion are nested.

8. The multi-group lens according to claim 7, characterized in that: The light-transmitting portion surrounds the light-shielding portion and covers at least a portion of the outer circumferential surface of the light-shielding portion.

9. The multi-group lens according to claim 7, characterized in that: The light-transmitting portion and the light-shielding portion are an integral part formed by a two-color injection molding process.

10. A multi-group lens, characterized in that: It includes a first lens and a second lens bonded by glue, wherein the first lens and the second lens respectively include lens barrels, at least one of the lens barrels includes a light-transmitting portion that allows preset light to pass through and irradiate the glue, and a light-shielding portion connected to the light-transmitting portion, the light-shielding portion is surrounded to form a cavity, and the method of curing the glue includes irradiation with ultraviolet light.

11. The multi-group lens according to claim 10, characterized in that: The lens barrel is a hollow structure with two ends open, having a first end and a second end opposite to each other, and a cavity is formed between the first end and the second end; The light-transmitting portion has a light-incident surface and a light-exiting surface for external light to pass through, and the light-exiting surface is located at the second end, so that external light can be incident from the light-incident surface and emitted from the light-exiting surface located at the second end and irradiate the glue to cure the glue; The lens barrel further includes a side wall connecting the first end and the second end, and at least one of the first end, the second end and the side wall is provided with the light incident surface.

12. The multi-group lens according to claim 11, characterized in that: The light incident surface is a rotation surface, and the angle between the generatrix of the light incident surface and the axis of the lens barrel is 0-90 degrees.

13. The multi-group lens according to claim 11, characterized in that: The light incident surface and the light emitting surface are respectively arranged at the first end and the second end.

14. The multi-group lens according to claim 11, characterized in that: The light incident surface is parallel to the light emitting surface, and the light incident surface and the light emitting surface are perpendicular to the axis of the lens barrel.

15. The multi-group lens according to claim 10, characterized in that: The light-transmitting portion and the light-shielding portion are nested.

16. The multi-group lens according to claim 15, characterized in that: The light-transmitting portion surrounds the light-shielding portion and covers at least a portion of the outer circumferential surface of the light-shielding portion.

17. The multi-group lens according to claim 10, characterized in that: The light-transmitting portion and the light-shielding portion are an integral part formed by a two-color injection molding process.

18. A camera module, characterized in that: Comprising a plurality of group lenses as described in any one of claims 1-17.

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