WO2020258239A1 - Lens and lens module - Google Patents

Abstract

A lens (100) comprises an optical portion (110) having an optical axis (00') and an extension portion (120) arranged around the optical portion (110). The optical portion (110) comprises an object-side surface (111) and an image-side surface (112). The extension portion (120) comprises an outer annular surface (123) and a first extension surface (121) and a second extension surface (122) arranged opposite to each other. The first extension surface (121) and the second extension surface (122) are respectively connected to the object-side surface (111) and the image-side surface (112). The outer annular surface (123) connects the first extension surface (121) and the second extension surface (122). Multiple gate recesses (124) are formed on the outer annular surface (123), and arranged uniformly around the optical axis (00'). The multiple gate recesses (124) respectively correspond to gates of a mold used to manufacture the lens (100). The invention solves the problem in which a feed liquid cannot be quickly and fully filled in a mold cavity because the feed liquid can only be injected via a single gate due to the structural limitation of a lens (100), thus ensuring the dimensional precision of a formed lens (100), and the cylindricity and smoothness of the outer annular surface (123), thereby improving a product yield and imaging effect.

Description

Lens and lens module Technical field

This application relates to the field of optical technology, and in particular to a lens and a lens module.

Background technique

With the gradual maturity of optical imaging technology, various imaging products such as cameras, video cameras, and telescopes have also spread to millions of households. The design of lens modules has always been the key to the imaging quality of such products.

At present, there are more and more seven-element or eight-element lenses on the market, and consequently the outer diameter of the lens needs to be continuously expanded. However, based on the current structure of the lens, it is difficult to form a large outer diameter. Lenses with high dimensional accuracy;

technical problem

That is, the structure of the existing lens is difficult to adapt to the precision requirements of the existing lens module for the lens, especially the cylindricity and smoothness requirements of the outer ring surface of the lens. Therefore, the problem of continuous decline in the yield of the lens occurs. This has a greater impact on the imaging effect of the lens module.

Therefore, it is necessary to provide a new lens to solve the above technical problems.

Technical solutions

The purpose of the present application is to provide a lens to solve the technical problem that the structure of the current lens is difficult to meet the requirements of the existing lens module for the molding accuracy of the lens.

The technical solution of this application is as follows:

A lens is provided for a lens module. The lens includes an optical part having an optical axis and an extension part arranged around the optical part. The optical part includes an object side surface and an object side surface opposite to the object side surface. The image side surface, the extension portion includes an outer ring surface, and a first extension surface and a second extension surface disposed oppositely, the first extension surface and the second extension surface are respectively connected to the object side surface and the image On the side surface, the outer ring surface connects the first extension surface and the second extension surface;

A plurality of gate grooves are opened on the outer ring surface, and the plurality of gate grooves are evenly distributed around the optical axis, and the plurality of gate grooves are used to respectively correspond to the injection molding of the lens mold. Gate.

As an improvement, the outer ring surface is provided with four gate grooves, and the distance between the outer ring surface and the optical axis ranges from 4 to 4.5 mm.

As an improvement, the outer ring surface is provided with three gate grooves, and the distance between the outer ring surface and the optical axis ranges from 3.5 to 4 mm.

As an improvement, the outer ring surface is provided with two gate grooves, and the distance between the outer ring surface and the optical axis ranges from 3 to 3.5 mm.

As an improvement, the distance between the outer ring surface and the optical axis is R, the number of the gate grooves is N, and the following relationship is satisfied:

1≤R/N≤1.75.

The application also provides a lens module, which includes the above-mentioned lens.

As an improvement, the lens module further includes a lens barrel and a lens group, the lens barrel is provided with a light-passing hole and a receiving cavity connected to the light-passing hole, and the lens group includes at least seven lenses, each The lenses are stacked on each other and arranged in the receiving cavity;

At least one of the at least seven lenses is the lens.

Beneficial effect

The beneficial effect of the lens provided by the present application is that a plurality of gate grooves are uniformly arranged on the outer ring surface of the lens, and each gate groove is used to respectively correspond to the injection gate of the mold for making the lens. In the process of forming the lens, the material can be injected into the mold through multiple injection gates corresponding to the gate groove, that is, the material can be injected into the cavity from different positions through multiple injection gates, so that the material can be more It flows smoothly to all corners of the mold cavity, so as to fill the mold cavity quickly and fully, avoiding that the material can only be injected from a single gate due to the structural limitation of the lens itself, causing the material to be unable to fill quickly and fully The problem of full cavity further ensures the molding accuracy of the lens, especially the cylindricity and smoothness of the outer ring surface of the lens, thereby improving the molding stability of the lens and improving the yield rate and imaging effect of the lens.

The lens module provided in the present application has all the beneficial effects of the lens due to the use of the above-mentioned lens, which will not be repeated here.

Description of the drawings

FIG. 1 is a schematic diagram of the structure of a lens provided by an embodiment of the application;

FIG. 2 is a schematic diagram of the front structure of the lens provided in FIG. 1;

Fig. 3 is a schematic top view of the lens structure provided in Fig. 1;

FIG. 4 is a schematic diagram of a top view structure of a lens provided by an embodiment of the application;

FIG. 5 is a schematic top view of a lens structure provided by an embodiment of the application;

6 is a schematic cross-sectional structure diagram of a lens module provided by an embodiment of the application.

Among them, Figure 1 is a summary drawing.

Embodiments of the invention

The application will be further described below in conjunction with the drawings and implementations.

1 to 5, the present application discloses a lens 100 for the lens module 10, the lens 100 includes an optical portion 110 and an extension portion 120, the optical portion 110 has an optical axis OO', and includes an object side 111 And the image side surface 112, the object side surface 111 and the image side surface 112 are disposed opposite to the object side surface 111 in the extending direction of the optical axis OO', the extension portion 120 is disposed around the optical portion 110, and the extension portion 120 includes a first extension surface 121 and The second extension surface 122 is connected to the object side surface 111, and the first extension surface 121 extends from the object side surface 111 in a direction away from the optical axis OO', and the second extension surface 122 is connected to the image side surface 112, and The second extension surface 122 extends from the image side surface 112 in a direction away from the optical axis OO'. The extension portion 120 further includes an outer ring surface 123 connecting the first extension surface 121 and the second extension surface 122, and is provided on the outer ring surface 123 There are a plurality of gate grooves 124, and the plurality of gate grooves 124 are evenly distributed around the optical axis OO' of the optical part 110, and each of the gate grooves 124 is used to respectively correspond to the injection gate of the mold for making the lens 100.

In this way, a plurality of gate grooves 124 are provided at equal intervals on the outer ring surface 123 of the lens 100, and each of the gate grooves 124 is used to correspond to the gate of the mold used to make the lens 100. In the process of forming the lens 100, the material liquid can be injected into the mold through a plurality of injection gates corresponding to the gate groove 124, that is, the material liquid can be injected into the cavity from different positions through a plurality of injection gates to make the material liquid It can flow to all corners of the mold cavity more smoothly, so as to quickly and fully fill the mold cavity, avoiding the limitation of the number of gate grooves 124 of the lens 100 itself and only injecting the liquid from a single gate. The problem that the material liquid cannot fill the cavity quickly and fully, thereby ensuring the dimensional accuracy of the lens 100 molding, especially the cylindricity and smoothness of the outer ring surface 123 of the lens 100, thereby improving the molding stability of the lens 100, and further The yield rate and imaging effect of the lens 100 are improved.

In one embodiment, referring to FIGS. 1 to 3, there are four gate grooves 124, and the distance between the outer ring surface 123 and the optical axis OO' ranges from 4 to 4.5 mm, preferably 4.25 mm. That is, for the lens 100 with an outer diameter of 8 to 9 mm, four gate grooves 124 are provided on the outer ring surface 123. This structural design enables a better molding effect to be obtained when the glass lens is made by a mold. In particular, the outer ring surface 123 can achieve better cylindricity and smoothness.

In one embodiment, referring to FIG. 4, there are three gate grooves 124, and the distance between the outer ring surface 123 and the optical axis OO' ranges from 3.5 to 4 mm, preferably 3.75 mm. That is, for the lens 100 with an outer diameter of 7 to 8 mm, three gate grooves 124 are provided on the outer ring surface 123. This structural design enables a better molding effect to be obtained when the glass lens is made by a mold. In particular, the outer ring surface 123 can achieve better cylindricity and smoothness.

In one embodiment, referring to FIG. 5, there are two gate grooves 124, and the distance between the outer ring surface 123 and the optical axis OO' ranges from 3 to 3.5 mm, preferably 3.25 mm. That is, for the lens 100 with an outer diameter of 6 to 7 mm, two gate grooves 124 are provided on the outer ring surface 123. This structural design enables a better molding effect to be obtained when the glass lens is made by a mold. In particular, the outer ring surface 123 can achieve better cylindricity and smoothness.

In one embodiment, referring to FIGS. 1 to 5, assuming that the distance between the outer ring surface 123 and the optical axis OO' is R and the number of the gate grooves 124 is N, the following relationship is satisfied:

1≤R/N≤1.75.

Under the condition that the above relational expression is satisfied, such a structural design enables a better molding effect to be obtained when the glass lens is made by a mold, and in particular, the outer ring surface 123 achieves better cylindricity and smoothness.

It is understandable that the above-mentioned parameter optimization solution is only an optional solution of this embodiment, and appropriate adjustments can be made according to specific needs, and there is no unique limitation here.

Please refer to FIG. 1 to FIG. 6. The present application also provides a lens module 10 including the lens 100 described above. Of course, in different embodiments of the present application, the specific number of the lenses 100 can be increased or decreased according to actual conditions, and the specific structure of each lens 100 can also be selected according to actual conditions, which is not exclusively limited here.

The lens module 10 provided in the present application adopts the above-mentioned lens 100, and thus has all the beneficial effects of the above-mentioned lens 100, which will not be repeated here.

In one embodiment, referring to FIG. 6, the lens module 10 includes a lens barrel 200, a lens group 300, a pressing ring 400, a light shielding plate 500, and a light shielding film 600. The lens barrel 200 is provided with a light-passing hole 210 and a receiving The cavity 220, the receiving cavity 220 communicates with the light-passing hole 210, the lens group 300 includes 7 lenses, the 7 lenses are stacked in the receiving cavity 220 of the lens barrel 200, and the optical axes OO' of the 7 lenses are all aligned with The central axis of the light-passing hole 210 coincides. Among the seven lenses, at least one lens is the lens 100 provided in the present application.

In addition, the pressing ring 400, the light-shielding plate 500 and the light-shielding sheet 600 are all disposed in the receiving cavity 220, wherein the pressing ring 400 abuts against the lens furthest away from the light-passing hole 210 along the central axis of the light-passing hole 210. In order to compress the lens group 300 into the receiving cavity 220, there are multiple shading sheets 600, and each shading sheet 600 is arranged between two adjacent lenses to reduce the stray light of the lens module 10, and the shading plate 500 is located therein Between the two shading sheets 600, on the one hand, it is used to reduce the generation of stray light, and on the other hand, it can play an effective supporting role.

The above are only the implementation manners of this application. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of this application, but these are all protected by this application. range.

Claims (7)

A lens for a lens module, characterized in that the lens comprises an optical part with an optical axis, and an extension part arranged around the optical part, and the optical part includes an object side surface and a contact surface with the object side surface. Opposite the image side surface, the extension portion includes an outer ring surface, and a first extension surface and a second extension surface disposed oppositely, the first extension surface and the second extension surface are respectively connected to the object side surface and the The image side surface, the outer ring surface connects the first extension surface and the second extension surface; A plurality of gate grooves are opened on the outer ring surface, and the plurality of gate grooves are evenly distributed around the optical axis, and the plurality of gate grooves are used to respectively correspond to the injection molding of the lens mold. Gate. The lens of claim 1, wherein the outer ring surface is provided with four gate grooves, and the distance between the outer ring surface and the optical axis ranges from 4 to 4.5 mm. The lens of claim 1, wherein the outer ring surface is provided with three gate grooves, and the distance between the outer ring surface and the optical axis ranges from 3.5 to 4 mm. The lens of claim 1, wherein the outer ring surface is provided with two gate grooves, and the distance between the outer ring surface and the optical axis ranges from 3 to 3.5 mm. The lens of claim 1, wherein the distance between the outer ring surface and the optical axis is R, the number of the gate grooves is N, and the following relationship is satisfied: 1≤R/N≤1.75. To A lens module, characterized in that: the lens module includes the lens of any one of claims 1 to 5. The lens module according to claim 6, characterized in that: the lens module further comprises a lens barrel and a lens group, the lens barrel is provided with a light through hole and a receiving cavity connected to the light hole, and The lens group includes at least seven lenses, and each of the lenses is stacked and arranged in the receiving cavity; At least one of the at least seven lenses is the lens.