CN112596135A

CN112596135A - Lens, lens module and electronic equipment

Info

Publication number: CN112596135A
Application number: CN202011418957.XA
Authority: CN
Inventors: 王丽青
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-04-02

Abstract

The invention relates to the technical field of camera devices, and particularly discloses a lens, a lens module and electronic equipment. The lens includes: a core; and the edge part is arranged separately from the core part, is arranged around the core part and is fixedly connected with the core part, and the thickness of the edge part is smaller than that of the core part. The core part and the edge part of the lens are separately arranged, the core part with thicker thickness and the edge part with thinner thickness can be respectively processed, and the processing mould does not need to be provided with an ejector pin structure, so that the processing cost of the lens can be reduced. Meanwhile, the lens provided by the invention can reduce the difference between the aspheric shape and the design value of the lens, so that the production yield of the lens and the imaging quality of a lens module can be ensured.

Description

Lens, lens module and electronic equipment

Technical Field

The invention relates to the technical field of camera devices, in particular to a lens, a lens module and electronic equipment.

Background

In recent years, a small-head camera has become a trend in which a general heat-shielding tide comes. Referring to fig. 1, it is a trend to miniaturize the first lens 100' exposed outside the lens barrel 400' at the end of the lens barrel, but the first lens 100' has a thicker central thickness and a thinner edge structure, and an ejector pin structure needs to be added on the mold to eject the lens from the mold, thereby causing poor eccentricity. In addition, the ratio of the core thickness to the edge thickness of the first lens 100' is large, which causes different plastic shrinkage ratios, resulting in large differences between the shape and design value of the aspheric surface, and seriously affects the imaging quality and yield.

Disclosure of Invention

The invention discloses a lens, a lens module and electronic equipment.

In order to achieve the above object, an embodiment of the present invention discloses a lens, including:

a core; and

the edge part is arranged separately from the core part, is arranged around the core part and is fixedly connected with the core part, and the thickness of the edge part is smaller than that of the core part.

Because the core part and the edge part of the lens are separately arranged, when the lens is actually processed, the core part with thicker thickness and the edge part with thinner thickness can be respectively processed, and a processing mould does not need to be provided with an ejector pin structure, so that the processing cost of the lens can be reduced. Meanwhile, the core part and the edge part of the lens are arranged separately, and the plastic shrinkage ratio of the core part and the edge part of the lens can be controlled, so that the shrinkage ratio of each part of the core part and the plastic shrinkage ratio of each part of the edge part are the same as far as possible, the difference between the aspheric surface shape and the design value of the lens is reduced, and the production yield of the lens and the imaging quality of a lens module can be ensured.

As an alternative implementation mode, in the embodiment of the invention, the core comprises an object side surface and an image side surface, the peripheral diameter of the object side surface of the core is A1, the peripheral diameter of the image side surface of the core is A4, and the ratio of A4/A1 is in the range of 0.8-1.5. When the ratio range of A4/A1 is less than 0.8, the outer edge portion of the core is too thin, core molding is difficult, and the yield of the core is lowered. When the ratio range of a4/a1 is greater than 1.5, the object-side surface of the core 110 may be relatively large, which makes it difficult to meet the small-head design requirements of the lens module. Therefore, the ratio of A4/A1 is 0.8-1.5, so that the yield of core production can be ensured, and the requirements of the design of the small head of the lens module can be met.

As an alternative embodiment, in an embodiment of the present invention, the edge portion is disposed around one end of the core portion close to the image side surface of the core portion, and is fixed to the core portion by a fixing adhesive, so that the structure is simple, and the separate arrangement of the core portion and the edge portion can be realized while ensuring the optical performance of the lens.

As an alternative implementation manner, in the embodiment of the present invention, a glue dispensing groove is provided between the side of the edge portion close to the core portion and the core portion, and the depth A8 of the glue dispensing groove in the lens thickness direction is 0.05mm to 0.1 mm. When the depth of A8 is less than 0.05mm, the flash phenomenon is liable to occur, and when the depth of A8 is greater than 0.1mm, the contact area between the edge portion and the core portion is reduced, reducing the strength of connection therebetween.

As an alternative implementation manner, in an embodiment of the invention, the edge portion is disposed around an end of the core portion close to the image side surface of the core portion, an engaging groove is disposed on one of the side surface of the edge portion close to the core portion and the side surface of the core portion close to the edge portion, and an engaging rib adapted to the engaging groove is disposed on the other of the side surface of the edge portion close to the core portion and the side surface of the core portion close to the edge portion. Through the mutually supporting effect of meshing groove and meshing bead, can increase the bearing area between edge portion and the core, can increase the stability of being connected between edge portion and the core.

As an alternative embodiment, in an embodiment of the invention, the thickness of the core decreases gradually in the direction from the axis to the outer edge of the core, and the maximum thickness of the core is a2 and the minimum thickness of the core is a5, wherein a2/a5 < 2.5. A2/A5 is less than 2.5, so that the plastic shrinkage ratio of each part of the core part can be ensured as far as possible, the core part is convenient to form, and the production yield of the core part is improved.

As an alternative, in an embodiment of the present invention, the outer peripheral surface of the core portion for cooperating with the edge portion is a tapered side surface, the distance between the tapered side surface and the axis of the core portion gradually increases in a direction approaching the image side surface of the core portion, and the included angle between the tapered side surface and the axis of the core portion is a, where a is 10 ° to 30 °. When the angle a is less than 10 °, the tapered side surface tends to be more parallel to the axis of the core, which is disadvantageous in demolding of the core. When the included angle a3 is greater than 30 °, the size of the core is increased, thereby increasing the size of the head of the lens module, which is inconvenient for implementing a small head design of the lens module.

As an alternative embodiment, in an embodiment of the invention, the peripheral diameter of the image side surface of the core is a4, wherein a4 is 0.9mm to 1.35 mm. By setting the A4 to be 0.9-1.35 mm, on one hand, the full screen design of the electronic equipment can be conveniently realized as much as possible, and on the other hand, the optical performance of the lens is also conveniently ensured.

As an alternative embodiment, in an embodiment of the invention, the edge portion comprises an object-side surface, the maximum distance between the object-side surface of the edge portion and the object-side surface of the core portion being A3, wherein A3 is 0.8mm to 1.5 mm. When A3 is greater than 1.5mm, the overall thickness of the core is greater, and when A3 is less than 0.8mm, the edge portion is thicker, that is, when A3 exceeds the range of 0.8mm to 1.5mm, it is inconvenient to achieve a slim design of the lens and the lens module having the same.

As an alternative implementation manner, in the embodiment of the present invention, the thickness of the edge portion is a6, and the maximum thickness of the core portion is a2, where a6 < (a2)/2 facilitates the realization of the light and thin design of the lens.

As an alternative, in the embodiment of the present invention, the fitting width of the edge portion and the core portion is a7, wherein a7 is 0.05mm to 0.10 mm. The A7 is set to be 0.05 mm-0.10 mm, so that the contact area between the core part and the edge part can be ensured, the connection strength between the core part and the edge part is improved, the excessive thickness of the edge part can be reduced, and the requirement of miniaturization design of the lens module can be met.

As an optional implementation manner, in an embodiment of the present invention, the edge portion is made of a light shielding material, or a surface of the edge portion is provided with a light shielding layer.

According to another aspect of the present invention, an embodiment of the present invention further discloses a lens module, where the lens module includes a lens barrel and a lens group, the lens barrel is provided with a mounting hole, the lens group is mounted in the mounting hole, the lens group includes the lens as described above, and the lens is located at an object end of the mounting hole, so as to facilitate realization of a small head design of the lens module, and provide a necessary structural basis for a miniaturized design of the lens module and a design of a full-screen electronic device.

As an optional implementation manner, in the embodiment of the present invention, the edge portion of the lens is integrally formed with the lens barrel, so that the production process of the lens module can be simplified, and the production cost of the lens module can be reduced.

According to another aspect of the present invention, an embodiment of the present invention further discloses an electronic device, which includes the lens module as described above.

Compared with the prior art, the lens module and the electronic equipment at least have the following beneficial effects:

the core part and the edge part of the lens are separately arranged, when the lens is actually processed, the core part with the thicker thickness and the edge part with the thinner thickness can be respectively processed, and the processing mould does not need to be provided with an ejector pin structure, so that the processing cost of the lens can be reduced. Meanwhile, the core part and the edge part of the lens are separately arranged, and the plastic shrinkage ratio of the core part and the edge part of the lens can be controlled, so that the shrinkage ratio of each part of the core part and the plastic shrinkage ratio of each part of the edge part are the same as much as possible, the difference between the aspheric surface shape and the design value of the lens is reduced, and the production yield of the lens and the imaging quality of the lens module are higher.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a cross-sectional view of a lens module in the prior art;

FIG. 2 is a diagram of stray light spots generated by the lens module shown in FIG. 1;

FIG. 3 is a cross-sectional view of a disclosed lens according to an embodiment of the invention;

fig. 4 is a cross-sectional view of a lens module according to an embodiment of the present invention;

FIG. 5 is a schematic view illustrating the directions of stray light of the lens module shown in FIG. 4;

fig. 6 is a cross-sectional view of another lens module according to an embodiment of the present invention;

fig. 7 is a front view of an electronic device disclosed in the second embodiment of the present invention.

Icon: 100. a lens; 110. a core; 111. image side (of the core); 112. object side (of the core); 120. an edge portion; 121. image side (of the edge); 122. object side (edge); 130. dispensing a glue groove; 400. a lens barrel; 410. mounting holes; 200. a lens module; 300. an electronic device; 301. a housing; 500. a lens.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the particular nature and configuration of which may be the same or different, and not intended to indicate or imply the relative importance or importance of the indicated device, element, or component.

The following detailed description is made with reference to the accompanying drawings.

Example one

Referring to fig. 3 and 4, according to an embodiment of the present invention, there is provided a lens module including a lens barrel 400 and a lens group.

The lens barrel 400 is provided with a mounting hole 410, and the mounting hole 410 facilitates mounting of the lens group. During actual installation, a lens group is installed in the installation hole 410, and specifically, the lens group includes a plurality of lenses, and the plurality of lenses are stacked along the axial direction of the installation hole 410, so that light rays emitted into the lens barrel 400 can be processed to obtain high-quality images.

Optionally, the lens group in this embodiment includes a lens 100, the lens 100 is located on the object side of the lens barrel 400, and the lens 100 includes a core 110 and a rim 120. The rim portion 120 is provided separately from the core portion 110, the rim portion 120 is provided around the core portion 110 and fixedly connected to the core portion 110, and the thickness of the rim portion 120 is smaller than that of the core portion 110. It is understood that the thickness of the core portion 110 and the thickness of the rim portion 120 in the present embodiment both refer to the thickness of the core portion 110 and the rim portion 120 in the axial direction of the lens barrel 400.

Since the core portion 110 and the edge portion 120 of the lens 100 in this embodiment are separately provided, the core portion 110 having a relatively large thickness and the edge portion 120 having a relatively small thickness can be separately processed when the lens 100 is actually processed, and a processing mold does not need to be provided with a thimble structure, thereby reducing the processing cost of the lens 100. Meanwhile, the core part 110 and the rim part 120 of the lens 100 are separately arranged, and the plastic shrinkage ratio of the core part 110 and the rim part 120 of the lens 100 can be controlled, so that the shrinkage ratio of each part of the core part 110 and the plastic shrinkage ratio of each part of the rim part 120 are the same as much as possible, the difference between the aspheric shape and the design value of the lens 100 is reduced, and the production yield of the lens 100 and the imaging quality of the lens module can be ensured.

When the lens 100 in this embodiment is mounted on the lens barrel 400, the lens 100 is located at the object end of the mounting hole 410, which facilitates the small head design of the lens module, and provides a necessary structural basis for the miniaturization design of the lens module and the design of the full-screen electronic device.

As shown in fig. 3, the core 110 in the present embodiment includes an object side surface 112 and an image side surface 111, the outer diameter of the image side surface 111 of the core 110 is a1, and the outer diameter of the object side surface 112 of the core 110 is a4, wherein the ratio a4/a1 is in the range of 0.8-1.5, such as 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, or 1.5. When the ratio range of a4/a1 is less than 0.8, the outer edge portion of the core 110 is too thin, the core 110 is difficult to mold, and the yield of the core 110 is lowered. When the ratio range of a4/a1 is greater than 1.5, the object-side surface 112 of the core 110 may be relatively large, which makes it difficult to meet the small-head design requirements of the lens module. Therefore, in the embodiment, the ratio of A4/A1 is in the range of 0.8-1.5, so that the yield of the core part 110 can be ensured, and the requirement of the design of the small head part of the lens module can be met.

Further, the core 110 of the present embodiment is disposed in a column shape, the rim 120 is disposed in a ring shape, the rim 120 surrounds the outer circumference of the core 110, the core 110 is located at a central portion of the rim 120, and the rim 120 surrounds an end of the core 110 close to the image side 111 of the core 110 and is fixed to the core 110 by a fixing adhesive, so that the structure is simple, and the separate disposition of the core 110 and the rim 120 can be realized while ensuring the optical performance of the lens 100.

Alternatively, the fixing adhesive in the present embodiment may be an optical adhesive (OCA), such as an organic silica gel, an acrylic resin, an unsaturated polyester resin, a polyurethane resin, an epoxy resin, and the like.

In the process of bonding the edge portion 120 and the core portion 110, the flash is likely to occur, and for this reason, the side of the edge portion 120 close to the core portion 110 in the present embodiment has the dispensing groove 130 therebetween, and when the edge portion 120 and the core portion 110 are actually bonded, the dispensing groove 130 can prevent the flash phenomenon from occurring, so that the optical performance of the lens 100 can be ensured.

Optionally, the depth A8 of the dispensing slot 130 in the thickness direction of the lens 100 in this embodiment is 0.05mm to 0.1mm, such as 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, or 0.1 mm. When the depth of A8 is less than 0.05mm, the flash phenomenon is liable to occur, and when the depth of A8 is greater than 0.1mm, the contact area between the rim portion 120 and the core portion 110 is reduced, reducing the connection strength therebetween.

In other embodiments of the present invention, the edge portion is disposed around one end of the core portion close to the image side surface of the core portion, one of the side surface of the edge portion close to the core portion and the side surface of the core portion close to the edge portion is provided with an engaging groove, and the other one of the side surface of the edge portion close to the core portion and the side surface of the core portion close to the edge portion is provided with an engaging convex rib adapted to the engaging groove.

Further, the fitting width of the rim portion 120 and the core portion 110 in the present embodiment is a7, where a7 is 0.05mm to 0.10mm, such as 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, or 0.1 mm. It is understood that the engagement width of the edge portion 120 with the core portion 110 refers to the width of the engagement position of the edge portion 120 with the core portion 110 in the height direction of the surface of the core portion 110, see specifically a7 labeled in fig. 1. Setting a7 to be 0.05 mm-0.10 mm can not only ensure the contact area between the core 110 and the edge 120 and improve the connection strength between the two, but also reduce the thickness of the edge 120, thereby meeting the requirement of miniaturization design of the lens module.

Further, the outer peripheral surface of the core portion 110 for engagement with the rim portion 120 in the present embodiment is a tapered side surface, the distance of which from the axis of the core portion 110 gradually increases in a direction approaching the image side surface 111 of the core portion 110, and the included angle between the tapered side surface and the axis of the core portion 110 is a, where a is 10 ° to 30 °, for example, 10 °, 15 °, 20 °, 25 °, 30 °, or the like. When the angle a is less than 10 °, the tapered side surface tends to be more parallel to the axis of the core 110, which is disadvantageous in demolding of the core 110. When the included angle a3 is greater than 30 °, the size of the core 110 is increased, thereby increasing the size of the head of the lens module, which is inconvenient to implement a small head design of the lens module.

Further, the thickness of the core 110 in the present embodiment gradually decreases in the direction from the axis of the core 110 to the outer edge, and the maximum thickness of the core 110 is a2, and the minimum thickness of the core 110 is a5, wherein a2/a5 < 2.5, such as 0.5, 1, 1.5, 2, 2.5, etc. A2/A5 is less than 2.5, so that the plastic shrinkage ratio of each part of the core part 110 can be ensured as far as possible, the core part 110 is convenient to mold, and the production yield of the core part 110 is improved.

Further, the peripheral diameter a4 of the object-side surface 112 of the core 110 in the present embodiment is 0.9mm to 1.35mm, such as 09mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, or 1.35mm, and by setting a4 to 0.9mm to 1.35mm, it is convenient to achieve a full screen design of the electronic device as much as possible on the one hand, and to ensure the optical performance of the lens 100 on the other hand.

Further, the rim portion 120 in this embodiment comprises an object side surface 122 and an image side surface 121, the maximum distance between the object side surface 122 of the rim portion 120 and the object side surface 121 of the core portion 110 being A3, wherein A3 is 0.8mm to 1.5mm, such as 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm or 1.5 mm. When A3 is greater than 1.5mm, the overall thickness of the core 110 is large, and when A3 is less than 0.8mm, the edge 120 is thick, that is, when A3 exceeds the range of 0.8mm to 1.5mm, it is inconvenient to implement a light and thin design of the lens and the lens module having the lens.

Further, the thickness of the edge portion 120 in the present embodiment is a6, where a6 < (a2)/2 facilitates the light and thin design of the lens 100.

In some embodiments of the present invention, the edge portion 120 is made of a light-shielding material, and the edge portion 120 is made of the light-shielding material, and when the lens 100 is installed in the lens barrel 400, no light-shielding sheet is required to be disposed between the lens 100 and the lens piece adjacent to the lens 100, as shown in fig. 5, the edge portion 120 can achieve a light-shielding effect without a light-shielding sheet being disposed between the lens 100 and the lens piece 500, which can reduce the production cost of the lens module.

Alternatively, in another embodiment of the present invention, a light shielding layer may be disposed on the surface of the edge portion 120, and the function of the light shielding sheet is realized by the light shielding layer, so that the edge portion 120 can realize the light shielding function without disposing the light shielding sheet between the lens 100 and the lens 500, and the production cost of the lens module can be reduced.

Illustratively, the light shielding material and the light shielding layer are both made of black materials. The black material can absorb light of all colors and has stronger performance of absorbing stray light. This black material can be black iron, manganese, chromium, vanadium, titanium etc. for example, can also be other metal alloys that have black extinction performance etc. set up shading material and light shield layer into the metal level, not only has extinction performance, can also improve the structural strength of edge portion 120, makes edge portion 120 atress effect better, helps promoting the assembly stability and the reliability of lens module.

Further, compared to the structure in fig. 1, the lens 100 'in fig. 1 may generate a part of stray light, and the stray light may be internally reflected in the lens 100' to affect the imaging quality of the lens module, as shown in fig. 2, and fig. 2 illustrates a diagram of a stray light spot generated by the lens module in fig. 1. In contrast, the lens 100 of the present embodiment includes the core portion 110 and the edge portion 120, which are separately disposed, so that after the light is projected on the lens 100, the internal reflection of the stray light in the core portion 110 will automatically disappear (as shown by an arrow in fig. 4), thereby improving the imaging quality of the lens module.

Further, the lens barrel 400 in this embodiment may have a cylindrical, prismatic, stepped cylindrical structure or other irregular cylindrical structure. As shown in fig. 4, the lens barrel 400 in this embodiment is a stepped cylindrical structure, which is a cylindrical structure having a stepped surface on an outer surface, and the mounting hole 410 in this embodiment is a stepped hole, so that during actual mounting, each lens of the lens group is placed on the step of the mounting hole 410, and can be fixed in the mounting hole 410 by glue, a fastener, a screw, or a pin. Preferably, the fixing is performed by glue, which may be optical adhesive (OCA), such as organic silica gel, acrylic resin, unsaturated polystyrene, polyurethane, epoxy resin, and the like.

Optionally, the cross-section of the mounting hole 410 is circular in this embodiment. In other embodiments, the cross-section of the mounting hole 410 may be rectangular, oval, or polygonal. The cross-sectional shape of the mounting hole 410 corresponds to the cross-sectional shape of a lens in the lens set. For example, when the cross-sectional shape of the lens is circular, the cross-sectional shape of the mounting hole 410 is circular.

Referring to fig. 7, in some embodiments of the present invention, the edge portion 120 of the lens 100 is integrally formed with the lens barrel 400, so that the production process of the lens module can be simplified and the production cost of the lens module can be reduced.

As described above, since the core portion 110 and the edge portion 120 of the lens 100 in the present embodiment are provided separately, the core portion 110 having a large thickness and the edge portion 120 having a small thickness can be processed separately when the lens 100 is actually processed, and the processing mold does not need to provide a thimble structure, which can reduce the processing cost of the lens 100. Meanwhile, the core portion 110 and the rim portion 120 of the lens 100 are separately provided, and the plastic shrinkage ratio of the core portion 110 and the rim portion 120 of the lens 100 can be controlled, so that the shrinkage ratio of each portion of the core portion 110 and the plastic shrinkage ratio of each portion of the rim portion 120 are the same as much as possible, the difference between the aspheric shape and the design value of the lens 100 is reduced, and the production yield of the lens 100 and the imaging quality of the lens module are high.

Therefore, the lens module provided by the application can improve the forming stability of the lens 100 and improve the production yield of the single lens 100; stray light generated by reflection in the lens 100 can be improved, so that the imaging quality is improved, and the use experience of a customer is improved; in addition, the lens module that this application provided can also practice thrift the cost, promotes the competitiveness of product.

Example two

Referring to fig. 7, the present invention provides an electronic device 300, where the electronic device 300 may be a wearable device such as a mobile phone, a tablet computer, a notebook computer, a telephone watch, and the like, the electronic device includes a lens module 200 and a housing 301, the lens module 200 is disposed in the housing 301, and the lens module 200 in this embodiment is a lens module in one implementation.

Since the electronic device 300 of the present embodiment includes the lens module of the above-described embodiment, and the core portion 110 and the edge portion 120 of the lens 100 of the lens module are provided separately, the core portion 110 having a large thickness and the edge portion 120 having a small thickness can be processed separately when the lens 100 is actually processed, and the processing mold does not need to be provided with a thimble structure, so that the processing cost of the lens 100 can be reduced. Meanwhile, the core portion 110 and the rim portion 120 of the lens 100 are separately provided, and the plastic shrinkage ratio of the core portion 110 and the rim portion 120 of the lens 100 can be controlled, so that the shrinkage ratio of each portion of the core portion 110 and the plastic shrinkage ratio of each portion of the rim portion 120 are the same as much as possible, the difference between the aspheric shape and the design value of the lens 100 is reduced, and the production yield of the lens 100 and the imaging quality of the lens module are high.

The above detailed description is made on a lens, a lens module and an electronic device disclosed in the embodiments of the present invention, and the principle and the implementation of the present invention are explained in the present document by applying specific examples, and the description of the above embodiments is only used to help understanding a lens, a lens module and an electronic device and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A lens, comprising:

a core; and

2. The lens of claim 1, wherein the core comprises an object side surface and an image side surface, the object side surface of the core has a peripheral diameter of A1, the image side surface of the core has a peripheral diameter of A4, and wherein the ratio A4/A1 is in the range of 0.8-1.5.

3. The lens of claim 1, wherein the rim portion is disposed around an end of the core portion adjacent to the image side surface of the core portion and is fixed to the core portion by a fixing adhesive.

4. The lens of claim 3, wherein a glue dispensing groove is formed between the side of the edge portion close to the core portion and the core portion, and a depth A8 of the glue dispensing groove in the thickness direction of the lens is 0.05mm to 0.1 mm.

5. The lens of claim 1, wherein the edge portion is disposed around an end of the core portion near the image side surface of the core portion, and wherein an engaging groove is disposed on one of the side surface of the edge portion near the core portion and the side surface of the core portion near the edge portion, and an engaging rib adapted to the engaging groove is disposed on the other of the side surface of the edge portion near the core portion and the side surface of the core portion near the edge portion.

6. The lens of claim 1, wherein the core has a thickness that gradually decreases in a direction from the axis to the outer edge of the core, and the core has a maximum thickness of a2 and a minimum thickness of a5, wherein a2/a5 < 2.5.

7. The lens according to claim 1, wherein the outer peripheral surface of the core portion for fitting with the edge portion is a tapered side surface whose distance from the axis of the core portion gradually increases in a direction approaching the image side surface of the core portion, and an angle between the tapered side surface and the axis of the core portion is a, where a is 10 ° to 30 °.

8. The lens of claim 1, wherein the peripheral diameter of the image side surface of the core is a4, wherein a4 is 0.9mm to 1.35 mm.

9. The lens of claim 2, wherein the rim portion includes an object-side surface, a maximum distance between the object-side surface of the rim portion and the object-side surface of the core portion being A3, wherein A3 is 0.8mm to 1.5 mm.

10. The lens of claim 1, wherein the rim portion has a thickness of a6 and the core portion has a maximum thickness of a2, wherein a6 < (a 2)/2.

11. The lens of claim 1, wherein the rim portion has a mating width of a7 with the core portion, wherein a7 is 0.05mm to 0.10 mm.

12. The lens according to any one of claims 1 to 11, wherein the edge portion is made of a light-shielding material, or a surface of the edge portion is provided with a light-shielding layer.

13. A lens module, comprising a lens barrel provided with a mounting hole and a lens group mounted in the mounting hole, wherein the lens group comprises the lens according to any one of claims 1 to 12, and the lens is located at an object end of the mounting hole.

14. The lens module as claimed in claim 13, wherein the edge of the lens is integrally formed with the barrel.

15. An electronic apparatus, characterized in that the electronic apparatus comprises the lens module according to claim 13 or 14.