CN214151115U

CN214151115U - Lens, lens and mold

Info

Publication number: CN214151115U
Application number: CN202120128717.XU
Authority: CN
Inventors: 王丽青
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-09-07
Anticipated expiration: 2031-01-18

Abstract

The application provides a lens, a lens and a mold. The lens includes: an optical zone; and the bearing area is arranged around the optical area and is far away from the optical axis of the lens relative to the optical area, the bearing area comprises a plurality of concave structures, the concave structures are symmetrically arranged relative to the symmetrical plane, the optical axis is positioned in the symmetrical plane, the bearing area also comprises an outer peripheral surface, the outer peripheral surface is formed between the object side surface of the bearing area and the image side surface of the bearing area, and one side of each concave structure penetrates through the outer peripheral surface. The lens can ensure the flow rate of the molten resin in the optical area and the bearing area to be consistent in the injection molding process, and can avoid the generation of a welding line; and the light rays injected from the external specific position can be ensured to directly reach the imaging surface, and the light rays are prevented from reaching the imaging surface after being reflected for many times in the bearing area, so that the imaging quality is influenced, and the performance and the quality of the lens are higher.

Description

Lens, lens and mold

Technical Field

The application relates to the technical field of optical imaging, in particular to a lens, a lens and a mold.

Background

The lens is a basic and indispensable optical element in an optical system, and plays a very critical and important role in an optical imaging lens. The imaging quality of the optical imaging lens is directly related to the quality of the lens used, so how to manufacture a lens with good quality becomes an important issue in manufacturing an optical system.

In order to meet the current requirements for optical imaging lenses, there is a need to use lenses with large thickness ratio. In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art: in the injection molding process of the lens with a large thickness-thickness ratio, after molten resin in a high-temperature state is supplied to a cavity of a mold from a pouring gate, the molten resin is slow at a thin part and fast in flow speed at a thick part, and when the molten resin in an optical area and the molten resin in a bearing area are converged, a fusion line is generated due to air accumulation, so that the performance and the quality of the lens are influenced; and the light rays injected from the outside can be reflected for multiple times in the bearing area and reach the imaging surface, thereby influencing the imaging quality.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for a lens, a lens barrel and a mold to solve the above problems.

The embodiment of the application provides a lens, include:

an optical zone; and

the bearing area is arranged around the optical area and is far away from the optical axis of the lens relative to the optical area, the bearing area comprises a plurality of concave structures, the concave structures are symmetrically arranged relative to a symmetrical plane, the optical axis is positioned in the symmetrical plane, the bearing area further comprises an outer peripheral surface, the outer peripheral surface is formed between the object side surface of the bearing area and the image side surface of the bearing area, and one side of each concave structure penetrates through the outer peripheral surface.

The lens has the advantages that the bearing area is provided with the plurality of concave structures which are symmetrical relative to the symmetrical plane, so that the average thickness of each area of the molten resin in the flowing direction in the injection molding process is relatively uniform, the average flow velocity is close, and the generation of a welding line can be avoided; and one side of the concave structure penetrates through the peripheral surface of the bearing area, so that light rays injected from an external specific position can directly reach an imaging surface, the light rays are prevented from being reflected for multiple times in the bearing area and reaching the imaging surface, the imaging quality is influenced, and the performance and the quality of the lens are high.

In some embodiments, the recessed structure comprises a first recessed portion formed by recessing the object-side surface of the support region toward the image-side surface of the support region, the first recessed portion comprising a first bottom surface, one side of the first bottom surface extending through a junction of the object-side surface of the support region and the object-side surface of the optical region;

the opposite side of the first bottom surface penetrates through the image side surface of the bearing area, or the opposite side of the first bottom surface penetrates through the peripheral surface of the bearing area.

Therefore, the thickness of the bearing area in the optical axis direction can be reduced, the flow rate consistency of the molten resin in the optical area and the bearing area in the injection molding process is ensured, and the light is prevented from reflecting for many times in the bearing area and reaching the imaging surface.

In some embodiments, a distance between the first bottom surface and the optical axis gradually increases along a direction from an object side surface of the lens to an image side surface of the lens.

Therefore, the uniformity of the flow velocity of the molten resin during the molding of the first concave part in the injection molding process is ensured, the light path for generating stray light can disappear, and the light rays injected from the external specific position can directly reach the imaging surface.

In some embodiments, the first recessed portion further includes a first side surface and a second side surface disposed on two sides of the first bottom surface, the first side surface and the first bottom surface are connected to form a first junction line, the second side surface and the first bottom surface are connected to form a second junction line, and both the first junction line and the second junction line pass through the optical axis after extending along a projection line of a plane perpendicular to the optical axis.

Therefore, the thickness of the bearing region in the optical axis direction can be effectively reduced, the generation of a welding line is avoided, and the bearing strength of the bearing region is ensured.

In some embodiments, the first side surface further includes a first contour line, the first contour line is located on the object side surface of the lens, and both ends of the first contour line are connected to both ends of the first junction line, respectively, and the second side surface includes a second contour line, the second contour line is located on the object side surface of the lens, and both ends of the second contour line are connected to both ends of the second junction line, respectively;

the first contour line and the second contour line are perpendicular to the projection line of the plane of the optical axis, and the first intersection line and the second intersection line are perpendicular to the projection line of the plane of the optical axis, or the first intersection line and the second intersection line are perpendicular to the projection line of the plane of the optical axis, and the first contour line and the second contour line are perpendicular to the projection line of the plane of the optical axis.

Thus, the relationship between the side surface and the bottom surface of the first recess portion can be set as required.

In some embodiments, the first side and the second side are planar or curved.

Therefore, the flow speed of the molten resin in the first concave part in the injection molding process can be effectively reduced.

In some embodiments, a maximum included angle exists between two straight lines which intersect with the optical axis and respectively pass through the first contour line and the second contour line, and a sum of the maximum included angles of the plurality of first concave portions is less than 180 °.

Therefore, the bearing strength of the bearing area is ensured.

In some embodiments, the recessed structure further includes a second recessed portion, the second recessed portion is formed by recessing the image side surface of the bearing region towards the object side surface of the bearing region, the second recessed portion includes a second bottom surface, one side of the second bottom surface penetrates through the first bottom surface, and the other opposite side of the second bottom surface penetrates through the image side surface of the bearing region.

Therefore, the inner wall of the lens barrel can be provided with an accommodating groove, the accommodating groove can form a glue dispensing space with the second section to accommodate more optical glue, the connection stability of the lens and the lens barrel is higher, and the second concave part is arranged to reduce the identification yield of the lens in the assembling process.

In some embodiments, the recessed structure includes a third recessed portion, the third recessed portion is recessed from the outer peripheral surface of the bearing region toward the optical axis of the lens, the third recessed portion includes a third side surface and a fourth side surface, the third side surface is disposed near the object side surface of the bearing region, the minimum distance between the third side surface and the object side surface of the bearing region in the optical axis direction is greater than zero, the fourth side surface is disposed near the image side surface of the bearing region, and the minimum distance between the fourth side surface and the image side surface of the bearing region in the optical axis direction is greater than zero.

Therefore, the light rays reflected to the bearing area from the inside of the lens can be reflected for multiple times between the fourth side surface and the image side surface of the bearing area, and the purpose of eliminating stray light is achieved.

In some embodiments, the recessed structure includes a fourth recessed portion recessed from the outer peripheral surface of the bearing region toward the optical axis of the lens, and the fourth recessed portion respectively penetrates through the object-side surface of the bearing region and the image-side surface of the bearing region.

In some embodiments, the lens satisfies the following relationship:

T1/T2>2.5；

wherein T1 is the maximum thickness of the object side surface of the optical zone and the image side surface of the optical zone in the optical axis direction, and T2 is the minimum thickness of the object side surface of the optical zone and the image side surface of the optical zone in the optical axis direction.

Therefore, the molding stability and performance requirements of the lens can be ensured.

The embodiment of the present application further provides a lens, including:

a lens barrel; and

such as the lenses described above.

The lens comprises a lens, wherein the lens is provided with a plurality of concave structures which are symmetrical relative to a symmetrical plane in a bearing area, so that the average thickness of each area of the molten resin in the flowing direction in the injection molding process is relatively uniform, the average flow velocity is close, and the generation of a welding line can be avoided; and one side of the concave structure penetrates through the peripheral surface of the bearing area, so that light rays injected from an external specific position can directly reach an imaging surface, the light rays are prevented from being reflected for multiple times in the bearing area and reaching the imaging surface, the imaging quality is influenced, and the performance and the quality of the lens are high.

The embodiment of the present application further provides a mold, including:

a male die;

the female die is matched with the male die; and

the mold core is arranged in the male mold and/or the female mold, the mold core is provided with a mold cavity for molding a lens, the lens comprises an optical area and a bearing area, the bearing area is arranged around the optical area and is far away from an optical axis of the lens relative to the optical area, the bearing area comprises a plurality of concave structures, the concave structures are symmetrically arranged relative to a symmetrical plane, the optical axis is positioned in the symmetrical plane, the bearing area further comprises an outer peripheral surface, the outer peripheral surface is formed between an object side surface of the bearing area and an image side surface of the bearing area, and one side of each concave structure penetrates through the outer peripheral surface.

The lens can be formed by the mold, and the lens can ensure that the average thickness of each area of the molten resin in the flow direction is relatively uniform and the average flow velocity is close to each other in the injection molding process by arranging the plurality of concave structures which are symmetrical relative to the symmetrical plane in the bearing area, so that the generation of a welding line can be avoided; and one side of the concave structure penetrates through the peripheral surface of the bearing area, so that light rays injected from an external specific position can directly reach an imaging surface, the light rays are prevented from being reflected for multiple times in the bearing area and reaching the imaging surface, the imaging quality is influenced, and the performance and the quality of the lens are high.

Drawings

Fig. 1 is a schematic cross-sectional view of a lens barrel according to a first embodiment of the present application.

Fig. 2 is a front view of lenses in the lens barrel shown in fig. 1.

FIG. 3 is a schematic cross-sectional view of the lens shown in FIG. 2 taken along line A-A.

Fig. 4 is a schematic cross-sectional structure diagram of a mold according to a first embodiment of the present application.

Fig. 5 is a schematic cross-sectional view of a lens barrel according to a second embodiment of the present application.

Fig. 6 is a schematic cross-sectional view of lenses in the lens barrel shown in fig. 5.

Fig. 7 is a schematic cross-sectional view of an injection mold according to a second embodiment of the present application.

Fig. 8 is a schematic cross-sectional view of a lens barrel according to a third embodiment of the present application.

Fig. 9 is a schematic cross-sectional view of lenses in the lens barrel shown in fig. 8.

Fig. 10 is a schematic cross-sectional view of an injection mold according to a third embodiment of the present application.

Fig. 11 is a schematic cross-sectional view of a lens barrel according to a fourth embodiment of the present application.

Fig. 12 is a schematic cross-sectional view of lenses in the lens barrel shown in fig. 11.

Fig. 13 is a schematic cross-sectional view of an injection mold according to a fourth embodiment of the present application.

Fig. 14 is a schematic cross-sectional view of a lens barrel according to a fifth embodiment of the present application.

Fig. 15 is a schematic cross-sectional structure view of a lens in the lens barrel shown in fig. 14.

Fig. 16 is a front view of lenses in the lens barrel shown in fig. 14.

Fig. 17 is a schematic cross-sectional view of an injection mold according to a fifth embodiment of the present application.

Description of the main elements

Lens 100

Lens barrel 10

Light-passing hole 12

Lens 20

Optical zone 22

Bearing zone 24

Outer peripheral surface 240

Concave structure 241

First recessed portion 242

First bottom surface 2421

First side 2422

Second side 2423

First intersection line 2424

Second intersection 2425

First contour 2426

Second contour 2427

Bearing part 243

Second recess 244

Second bottom surface 2441

Third recess 245

Third side 2451

Fourth side 2452

Fourth recess 246

Object side 26

Image side 27

Mold 200

Male die 210

Gate 212

Flow passage 214

Master mold 220

Mold core 230

Mold cavity 232

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

Referring to fig. 1, a lens 100 includes a lens barrel 10 and a lens 20 according to a first embodiment of the present disclosure.

The lens barrel 10 has a light passing hole 12, and light incident from the outside can reach the lens 20 through the light passing hole 12.

The lens 20 is disposed in the light-passing hole 12 of the lens barrel 10, and the edge of the lens 20 is supported against the wall of the light-passing hole 12. It will be appreciated that in some embodiments, the edge of the lens 20 and the wall of the clear aperture 12 are fixedly attached together by optical cement.

It is understood that the number of the lens 20 may be one, or may be plural, and when the number of the lens 20 is plural, the plural lenses 20 are disposed at intervals along the optical axis.

Referring to fig. 2 and 3, lens 20 includes an optical zone 22 and a rest zone 24.

The primary function of optical zone 22 is to allow light incident from the outside to pass through for imaging.

A rest zone 24 is disposed around optical zone 22 and is distal from the optical axis through lens 20 relative to optical zone 22. The bearing region 24 includes a plurality of concave structures 241, the plurality of concave structures 241 are symmetrically disposed with respect to the symmetry plane, the optical axis is located in the symmetry plane, the bearing region 24 further includes an outer peripheral surface 240, the outer peripheral surface 240 is formed between the object-side surface of the bearing region 24 and the image-side surface of the bearing region 24, and one side of the concave structure 241 penetrates through the outer peripheral surface 240.

Note that the object side surface 26 of the lens 20 is formed by the object side surface of the support zone 24 and the object side surface of the optical zone 22, and the image side surface 27 of the lens 20 is formed by the image side surface of the support zone 24 and the image side surface of the optical zone 22, and for the sake of convenience of distinction, the object side surface 26 of the present embodiment only represents the object side surface of the lens 20, and the image side surface 27 only represents the image side surface of the lens 20.

The concave structure 241 includes a first concave portion 242, the first concave portion 242 is formed by an object side surface of the support region 24 being concave towards an image side surface of the support region 24, and the first concave portion 242 includes a first bottom surface 2421, a first side surface 2422 and a second side surface 2423.

The first bottom surface 2421 has a planar structure. The distance between the first bottom surface 2421 and the optical axis gradually increases along the direction from the object side surface 26 of the lens 20 to the image side surface 27 of the lens 20.

One side of first bottom surface 2421 extends through the junction of the object-side surface of bearing zone 24 and the object-side surface of optical zone 22, and the opposite side of first bottom surface 2421 extends through outer peripheral surface 240 of bearing zone 24. Thus, as shown in fig. 1, when the light beam enters the corresponding position of the first concave portion 242 from the specific external position, the light beam can be directly reflected to the image plane through the first bottom surface 2421 due to the existence of the first concave portion 242, so as to prevent the light beam from reaching the image plane after multiple reflections in the bearing region 24, thereby affecting the image quality.

It will be appreciated that in other embodiments, the opposite side of the first bottom surface 2421 extends through the image side surface of the landing zone 24. Specifically, the opposite side of first floor 2421 extends through the junction of the image side surface of the rest area 24 and the image side surface of optical area 22; or may extend through the interface between the image-side surface of the support zone 24 and the image-side surface of the optical zone 22 and the outer peripheral surface 240 of the support zone 24.

The first side surface 2422 and the second side surface 2423 are disposed on opposite sides of the first bottom surface 2421, the first side surface 2422 is connected with the first bottom surface 2421 to form a first intersection line 2424, the second side surface 2423 is connected with the first bottom surface 2421 to form a second intersection line 2425, and the first intersection line 2424 and the second intersection line 2425 both pass through the optical axis after extending along a projection line of a plane perpendicular to the optical axis.

The first side 2422 further includes a first contour 2426, the first contour 2426 is located on the object side 26 of the lens 20, and two ends of the first contour 2426 are respectively connected with two ends of the first intersection line 2424, that is, the first intersection line 2424 and the first contour 2426 form the first side 2422; the second side 2423 includes a second contour 2427, the second contour 2427 is located on the object side 26 of the lens 20, and two ends of the second contour 2427 are respectively connected with two ends of the second intersection line 2425, that is, the second intersection line 2425 and the second contour 2427 form the second side 2423.

Projection lines of the first intersection line 2424 and the second intersection line 2425 on a plane perpendicular to the optical axis are located between projection lines of the first contour line 2426 and the second contour line 2427 on the plane perpendicular to the optical axis, that is, the first side surface 2422 and the second side surface 2423 may both be curved surfaces, and may also be obliquely arranged with respect to the first bottom surface 2421.

It is understood that in other embodiments, the projection lines of the first and

second contour lines

2426 and 2427 on the plane perpendicular to the optical axis coincide with the projection lines of the first and second intersection lines on the plane perpendicular to the optical axis, respectively, that is, the first and

second side surfaces

2422 and 2423 are both disposed perpendicular to the first bottom surface 2421.

The maximum included angle exists between two straight lines which are intersected with the optical axis and respectively pass through the first contour lines 2426 and the second contour lines 2427, and the sum of the maximum included angles of the plurality of first concave parts 242 is smaller than 180 degrees, so that the bearing strength of the bearing area 24 is ensured.

In some embodiments, lens 20 satisfies the following relationship:

T1/T2>2.5；

where T1 is the maximum thickness of the object-side surface of optical zone 22 and the image-side surface of optical zone 22 in the optical axis direction, and T2 is the minimum thickness of the object-side surface of optical zone 22 and the image-side surface of optical zone 22 in the optical axis direction, it can be understood that the ratio of T1 to T2 is the thickness ratio. Thus, the molding stability and performance requirements of the lens 20 can be ensured.

The bearing region 24 further includes a plurality of bearing portions 243, the plurality of bearing portions 243 are alternately connected with the plurality of concave structures 241 and surround the periphery of the optical region 22, and the bearing portions 243 mainly function to bear against the hole walls of the light-transmitting hole 12.

In the lens 20, the plurality of concave structures 241 symmetrical relative to the symmetry plane are arranged in the bearing area 24, so that the average thickness of each area of the molten resin in the flowing direction is relatively uniform in the injection molding process, the average flow speed is close, and the generation of a welding line can be avoided; moreover, one side of the concave structure 241 penetrates through the outer peripheral surface 240 of the bearing area 24, so that light rays incident from an external specific position can be ensured to directly reach an imaging surface, and the light rays are prevented from reaching the imaging surface after being reflected for multiple times in the bearing area 24, thereby influencing the imaging quality, and the performance and the quality of the lens 20 are high.

Referring to fig. 4, a mold 200 including a male mold 210, a female mold 220 and a mold core 230 is also provided in the first embodiment of the present application.

The male mold half 210 and the female mold half 220 are fitted.

The two cores 230 are respectively disposed in the male mold 210 and the female mold 220, and the two cores 230 can form a cavity 232 after being butted, and the shape of the cavity 232 is matched with the shape of the lens 20 in the first embodiment. A gate 212 is arranged at the joint of the male mold 210 and the female mold 220, a runner 214 is further arranged at the joint of the male mold 210 and the female mold 220, one end of the runner 214 is communicated with the gate 212, and the other end is communicated with the cavity 232.

In the injection molding process, the molten resin can enter the cavity 232 for molding through the gate 212 and the runner 214, and the lens 20 with the shape matched with that of the cavity 232 can be obtained after cooling, and as the lens 20 is provided with the plurality of concave structures 241 symmetrical relative to the symmetry plane in the bearing area 24, the flow rate of the molten resin in the optical area 22 and the bearing area 24 can be ensured to be consistent in the injection molding process, and the generation of a fusion line can be avoided; moreover, one side of the concave structure 241 penetrates through the outer peripheral surface 240 of the bearing area 24, so that light rays incident from an external specific position can be ensured to directly reach an imaging surface, and the light rays are prevented from reaching the imaging surface after being reflected for multiple times in the bearing area 24, thereby influencing the imaging quality, and the performance and the quality of the lens 20 are high.

It is understood that in other embodiments, the two mold cores 230 may be a unitary structure.

It is understood that in other embodiments, the gate 212 and the runner 214 may be both located in the female mold member 220 and the male mold member 210, and are configured according to the actual requirement.

Referring to fig. 5 and fig. 6, a second embodiment of the present application provides a lens 100, including a lens barrel 10 and a lens 20, where the lens 20 includes an optical area 22 and a bearing area 24, and the structure of the lens 100 provided in the second embodiment is substantially the same as that of the lens 100 in the first embodiment, except that:

the concave structure 241 further includes a second concave portion 244, the second concave portion 244 is formed by the image side of the bearing region 24 being concave towards the object side of the bearing region 24, the second concave portion 244 includes a second bottom surface 2441, one side of the second bottom surface 2441 penetrates through the first bottom surface 2421 of the first concave portion 242, and the other opposite side of the second bottom surface 2441 penetrates through the image side of the bearing region 24.

Specifically, the opposite side of second base 2441 can extend through the junction of the image-side surface of seating zone 24 and the image-side surface of optical zone 22; or may extend through the interface between the image-side surface of the support zone 24 and the image-side surface of the optical zone 22 and the outer peripheral surface 240 of the support zone 24.

In the lens 20, the plurality of concave structures 241 symmetrical relative to the symmetry plane are arranged in the bearing area 24, so that the average thickness of each area of the molten resin in the flowing direction is relatively uniform in the injection molding process, the average flow speed is close, and the generation of a welding line can be avoided; moreover, one side of the concave structure 241 penetrates through the outer peripheral surface 240 of the bearing region 24, as shown in fig. 5, when the light enters the corresponding positions of the first concave portion 242 and the second concave portion 244 from the external specific position, due to the existence of the first concave portion 242 and the second concave portion 244, the light can be directly reflected to the image plane through the first bottom surface 2421 and the second bottom surface 2441, and the performance and quality of the lens 20 are high.

Referring to fig. 7, a second embodiment of the present application provides a mold 200, including a male mold 210, a female mold 220 and a mold core 230, wherein the mold 200 in the second embodiment has substantially the same structure as the mold 200 in the first embodiment, except that:

the mold core 230 has a cavity 232, and the shape of the cavity 232 is matched with the shape of the lens 20 in the second embodiment.

Referring to fig. 8 and 9, a lens 100 according to a third embodiment of the present application includes a lens barrel 10 and a lens 20, the lens 20 includes an optical area 22 and a bearing area 24, the structure of the lens 100 according to the third embodiment is substantially the same as that of the lens 100 according to the first embodiment, except that:

the recessed structure 241 includes a third recessed portion 245, the third recessed portion 245 is formed by the outer peripheral surface 240 of the bearing region 24 being recessed toward the optical axis of the lens 20, the third recessed portion 245 includes a third side face 2451 and a fourth side face 2452 which are opposite, the third side face 2451 is disposed close to the object side face of the bearing region 24, the minimum distance between the third side face 2451 and the object side face of the bearing region 24 in the optical axis direction is greater than zero, the fourth side face 2452 is disposed close to the image side face of the bearing region 24, and the minimum distance between the fourth side face 2452 and the image side face of the bearing region 24 in the optical axis direction is greater than zero.

In the present embodiment, the third recess 245 may have a cylindrical structure or a prismatic structure.

In the lens 20, the plurality of concave structures 241 symmetrical relative to the symmetry plane are arranged in the bearing area 24, so that the average thickness of each area of the molten resin in the flowing direction is relatively uniform in the injection molding process, the average flow speed is close, and the generation of a welding line can be avoided; moreover, one side of the concave structure 241 penetrates through the outer peripheral surface 240 of the bearing region 24, as shown in fig. 8, when the light enters the corresponding position of the third concave portion 245 from the external specific position, due to the existence of the fourth side 2452 of the third concave portion 245, the light can be reflected for multiple times between the fourth side 2452 and the image side surface of the bearing region 24, so as to achieve the purpose of eliminating stray light, and the performance and quality of the lens 20 are high.

Referring to fig. 10, a third embodiment of the present application provides an injection molding mold 200, including a male mold 210, a female mold 220 and a mold core 230, the mold 200 in the fourth embodiment has substantially the same structure as the mold 200 in the first embodiment, except that:

the mold core 230 has a cavity 232, and the shape of the cavity 232 is matched with the shape of the lens 20 in the third embodiment.

Referring to fig. 11 and 12, a lens 100 according to a fourth embodiment of the present invention includes a lens barrel 10 and a lens 20, the lens 20 includes an optical area 22 and a bearing area 24, the structure of the lens 100 according to the fourth embodiment is substantially the same as that of the lens 100 according to the first embodiment, except that:

In the present embodiment, the third recess 245 may be an inverted cone structure or an inverted pyramid structure.

It is understood that in other embodiments, the third recess 245 may have other shapes, not limited to the above shape, as long as the light is prevented from multiple reflections at the bearing region 24 and reaching the image plane.

In the lens 20, the plurality of concave structures 241 symmetrical relative to the symmetry plane are arranged in the bearing area 24, so that the flow rate of the molten resin in the optical area 22 and the flow rate of the molten resin in the bearing area 24 are consistent in the injection molding process, and the generation of a weld line can be avoided; moreover, one side of the concave structure 241 penetrates through the outer peripheral surface 240 of the bearing region 24, as shown in fig. 11, when the light enters the corresponding position of the third concave portion 245 from the external specific position, due to the existence of the fourth side 2452 of the third concave portion 245, the light can be reflected for multiple times between the fourth side 2452 and the image side surface of the bearing region 24, so as to achieve the purpose of eliminating stray light, and the performance and quality of the lens 20 are high.

Referring to fig. 13, a fourth embodiment of the present application provides a mold 200, including a male mold 210, a female mold 220 and a mold core 230, wherein the mold 200 of the fourth embodiment has substantially the same structure as the mold 200 of the first embodiment, except that:

the mold core 230 has a cavity 232, and the shape of the cavity 232 is matched with the shape of the lens 20 in the fourth embodiment.

Referring to fig. 14 to 16, a fifth embodiment of the present application provides a lens 100, including a lens barrel 10 and a lens 20, where the lens 20 includes an optical area 22 and a bearing area 24, and the structure of the lens 100 provided by the fifth embodiment is substantially the same as that of the lens 100 provided by the first embodiment, except that:

the recessed structure 241 includes a fourth recessed portion 246, the fourth recessed portion 246 is formed by the outer peripheral surface 240 of the bearing region 24 being recessed toward the optical axis of the lens 20, and the fourth recessed portion 246 penetrates through the object-side surface of the bearing region 24 and the image-side surface of the bearing region 24, respectively.

Referring to fig. 17, a fifth embodiment of the present application provides a mold 200, including a male mold 210, a female mold 220 and a mold core 230, wherein the mold 200 of the fifth embodiment has substantially the same structure as the mold 200 of the first embodiment, except that:

the mold core 230 has a cavity 232, and the shape of the cavity 232 is matched with the shape of the lens 20 in the fifth embodiment.

Although the present application has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the present application.

Claims

1. An ophthalmic lens, comprising:

an optical zone; and

2. The lens of claim 1, wherein the recessed feature comprises a first recessed portion formed by an object-side surface of the support zone recessed toward an image-side surface of the support zone, the first recessed portion comprising a first bottom surface having a side that intersects an object-side surface of the support zone at a junction with an object-side surface of the optical zone;

3. The lens of claim 2, wherein the distance between the first base surface and the optical axis increases in a direction from an object side surface of the lens to an image side surface of the lens.

4. The lens of claim 2, wherein the first depression further comprises a first side surface and a second side surface disposed on opposite sides of the first bottom surface, the first side surface meeting the first bottom surface to form a first line of intersection, the second side surface meeting the first bottom surface to form a second line of intersection, and the first line of intersection and the second line of intersection both pass through the optical axis after extending along a projection line of a plane perpendicular to the optical axis.

5. The lens of claim 4, wherein the first side further comprises a first contour line, the first contour line being located on the object side of the lens and having ends connected to the ends of the first junction line, respectively, and the second side comprises a second contour line, the second contour line being located on the object side of the lens and having ends connected to the ends of the second junction line, respectively;

6. The lens of claim 5, wherein the first side surface and the second side surface are both curved or both the first side surface and the second side surface are disposed obliquely with respect to the first bottom surface.

7. The lens of claim 5, wherein a maximum included angle exists between two straight lines that intersect the optical axis and pass through the first and second contour lines, respectively, and a sum of the maximum included angles of the plurality of first recesses is less than 180 °.

8. The lens of any of claims 2-7, wherein the recessed feature further comprises a second recessed portion formed by an image side surface of the bearing zone recessed toward an object side surface of the bearing zone, the second recessed portion comprising a second bottom surface, one side of the second bottom surface extending through the first bottom surface and an opposite side of the second bottom surface extending through the image side surface of the bearing zone.

9. The lens of claim 1, wherein the recessed feature comprises a third recessed portion formed by a peripheral surface of the bearing zone recessed toward an optical axis of the lens, the third recessed portion comprising opposing third and fourth sides, the third side disposed proximate an object side of the bearing zone, the third side disposed at a minimum distance from the object side of the bearing zone in the optical axis direction greater than zero, the fourth side disposed proximate an image side of the bearing zone, the fourth side disposed at a minimum distance from the image side of the bearing zone in the optical axis direction greater than zero.

10. The lens of claim 1, wherein the recessed feature comprises a fourth recessed portion formed by a peripheral surface of the bearing zone recessed toward the optical axis of the lens, the fourth recessed portion extending through an object-side surface of the bearing zone and an image-side surface of the bearing zone, respectively.

11. The lens of claim 1, wherein the lens satisfies the following relationship:

T1/T2>2.5；

12. A lens barrel characterized by comprising:

a lens barrel; and

the lens of any one of claims 1-11.

13. A mold, comprising:

a male die;

the female die is matched with the male die; and

the mould benevolence is located in the public mould and/or the female mould, mould benevolence has the die cavity in order to the shaping lens, the lens includes optics district and holds and leans on the district, it leans on the district to encircle optics district sets up, and for optics district keeps away from the optical axis of lens, it includes a plurality of sunk structure to hold and leans on the district, and is a plurality of sunk structure sets up for the plane of symmetry, the optical axis is located in the plane of symmetry, it leans on the district still includes the outer peripheral face to hold, the outer peripheral face is formed in hold lean on the object side face in district with hold between the image side face in district, one of them side of sunk structure runs through the outer peripheral face.