CN214845853U

CN214845853U - Optical lens and lens module

Info

Publication number: CN214845853U
Application number: CN202121263382.9U
Authority: CN
Inventors: 张梦; 张芳; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-11-23
Anticipated expiration: 2031-06-07

Abstract

The utility model relates to an optical lens piece (1) and camera lens module, optical lens piece (1) external diameter face is equipped with annular groove (2) coaxial with the optical axis, annular groove (2) have the thing side extinction cell wall (21) that are close to the thing side and be close to image side extinction cell wall (22) of picture side. The utility model discloses an optical lens piece can weaken stray light effectively at the annular groove of external diameter face setting.

Description

Optical lens and lens module

Technical Field

The utility model relates to an optical element especially relates to an optical lens piece and camera lens module.

Background

The mobile phone is used as an electronic device essential to daily life of people, not only has a simple communication function, but also has recording and storing functions, so that the photographing record is beautiful and becomes a part of life indelible instantly. To ensure that the photograph can record the truest scene, various stray lights in the lens are intolerable. Therefore, it is a difficult task in the art to eliminate stray light to improve the quality of the lens.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an optical lens piece and camera lens module.

In order to achieve the above object, the present invention provides an optical lens and a lens module, wherein the outer diameter surface of the optical lens is provided with an annular groove coaxial with the optical axis, and the annular groove has an object side extinction groove wall close to the object side and an image side extinction groove wall close to the image side.

According to an aspect of the present invention, the outer diameter a of the optical lens piece and the depth B of the annular groove satisfy the following relationship: 0<2B/A < 0.8.

According to an aspect of the present invention, the groove bottom width C of the annular groove and the edge thickness D of the optical lens satisfy the following relationship: 0< C/D < 0.8.

According to an aspect of the utility model, the thing side extinction cell wall with the radial contained angle theta 1 of optical lens and the image side extinction cell wall with the radial contained angle theta 2 of optical lens satisfies following condition respectively: 0< θ 1<90 °, 0< θ 2<90 °.

According to an aspect of the present invention, the groove bottom width C of the annular groove, the outer diameter surface is located the width C1 of the portion of the annular groove object side, the outer diameter surface is located the width C2 of the portion of the annular groove image side, the depth B of the annular groove, the object side extinction groove wall and the radial included angle θ 1 of the optical lens, the image side extinction groove wall and the radial included angle θ 2 of the optical lens and the edge thickness D of the optical lens satisfy the following relationships: d ═ C1+ C2+ C + B × (θ 1) + B × (θ 2).

According to one aspect of the present invention, the surface of the annular groove has a rough layer formed by laser atomization treatment or sand blast treatment;

the surface roughness Ra of the rough layer is more than or equal to 0.2 mu m and less than 0.35 mu m, and the thickness d1 is less than or equal to 2 mu m.

According to one aspect of the present invention, the surface of the annular groove has a color-plated layer formed by a surface color-plating treatment;

the thickness d2 of the color coating layer is less than or equal to 0.001mm, and the surface reflectivity is less than or equal to 0.2%.

According to one aspect of the present invention, the surface of the annular groove has a blackened layer formed through a blackening process;

the coating of the black coating layer is uniformly attached to the surface of the annular groove, or is filled in the annular groove;

the thickness d3 of the blackened layer attached to the surface of the annular groove is more than or equal to 0.005 mm;

the surface reflectivity of the black coating is less than or equal to 0.2%.

According to an aspect of the present invention, the cross-sectional shape of the annular groove is U-shaped, rectangular, trapezoidal, triangular, stepped, or trapezoidal.

According to an aspect of the invention, the outer shape of the optical lens is circular or has a cut edge.

According to one aspect of the present invention, the optical lens is made of resin and is formed by injection molding;

the optical lens and the annular groove are integrally formed.

A lens module comprises a lens barrel and at least one optical lens arranged in the lens barrel.

According to an aspect of the present invention, the optical lens is included, and the optical lens is located at the most image side end of the lens barrel.

According to the utility model discloses a scheme provides an optical lens piece and camera lens module, and optical lens piece's external diameter face has the annular groove of an extinction usefulness to can effectively improve the stray light that produces on the lens, with the formation of image quality that promotes optical lens. According to the utility model discloses a conceive, the annular groove has possessed two extinction cell walls of thing side and image side to can make the light that gets into in the annular groove reflect in two cell walls, thereby weaken stray light effectively.

According to the utility model discloses a scheme, through the relation of rationally setting up optical lens and the corresponding size of annular groove, angle, the light reflection effect of the both sides cell wall that can effectual increase annular groove to weaken stray light's intensity.

According to an aspect of the present invention, the size of the optical lens and the annular groove thereon satisfies D ═ C1+ C2+ C + B × (θ 1) + B × (θ 2), so that the position of the annular groove can be controlled by adjusting the size of C1/C2, thereby improving stray light at different angles.

According to the utility model discloses a scheme, the annular groove possesses multiple cross sectional shape, like this, can select different annular groove structure according to the stray light path to improve the stray light of different grade type.

According to the utility model discloses a scheme increases the rough surface layer, plates the look layer or scribbles the black layer, all is favorable to weakening stray light intensity, further realizes reducing stray light's function.

According to the utility model discloses a scheme, optical lens piece can be for the whole circular shape or through the processing of cutting edge to make different lens structures can satisfy multiple design demand.

According to the utility model discloses a scheme, optical lens piece adopts the injection moulding mode, and annular groove rather than integrated into one piece for optical lens piece's precision is high, stability is good, volume production nature is high.

According to the utility model discloses a scheme has in the camera lens module the utility model discloses an optical lens piece owing to there is the existence of annular groove for the stray light of camera lens module is less, and the camera lens quality is higher.

Drawings

Fig. 1 is a schematic diagram showing a structure of an optical lens (circular shape) according to an embodiment of the present invention;

fig. 2 is a schematic diagram showing a dimensional relationship between portions of an optical lens according to an embodiment of the present invention;

FIG. 3 schematically shows a block diagram of an annular groove in an optical lens according to various embodiments of the present invention;

FIG. 4 schematically illustrates a surface treatment of an annular groove in an optical lens according to various embodiments of the present invention;

fig. 5 is a schematic diagram showing a structure of an optical lens (having a cut edge) according to another embodiment of the present invention;

fig. 6 is a schematic diagram illustrating a configuration of a lens module according to an embodiment of the present invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In describing embodiments of the present invention, the terms "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and other terms are used in an orientation or positional relationship shown in the associated drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are not repeated herein, but the present invention is not limited to the following embodiments.

Referring to fig. 1, the optical lens 1 of the present invention has an annular groove 2 coaxial with the optical axis on the outer diameter surface. The utility model discloses in, the position that optical lens 1 inboard is close to the optical axis is the optics active area, and the position that the optical axis was kept away from in the outside is the non-optics active area. Thus, the annular groove 2 is disposed outside the non-optically effective area. According to the inventive concept, the annular groove 2 has an object-side extinction groove wall 21 close to the object side and an image-side extinction groove wall 22 close to the image side. Thereby, the annular groove 2 can change the course of the light path, so that stray light entering the annular groove 2 can be weakened. Specifically, light can be reflected for multiple times in two extinction groove walls, so that stray light energy can be weakened, good stray light elimination/weakening effect is realized, and imaging quality is improved.

The utility model discloses in, optical lens piece 1's material adopts injection moulding for the resin to

optical lens piece

1 and 2 integrated into one piece of annular groove. Thus, the optical lens 1 can be manufactured in an injection molding manner with high precision, good stability and high mass production.

Referring to fig. 2, the outer diameter a (or maximum diameter) of the optical lens 1 and the depth B (i.e., maximum depth) of the annular groove 2 satisfy the following relationship: 0<2B/A < 0.8. The groove bottom width C (or minimum width) of the annular groove 2 and the edge thickness D of the optical lens 1 satisfy the following relationship: 0< C/D < 0.8. An included angle θ 1 between the object-side extinction groove wall 21 and the radial direction of the optical lens 1 (i.e., the direction perpendicular to the optical axis) and an included angle θ 2 between the image-side extinction groove wall 22 and the radial direction of the optical lens 1 satisfy the following conditions: 0< θ 1<90 °, 0< θ 2<90 °. Satisfy above-mentioned setting, can strengthen the reflection of two extinction cell walls in the annular groove 2 to light to increase annular groove 2 and weaken the ability of stray light intensity. The groove bottom width C of the annular groove 2, the width C1 of the portion of the outer diameter surface G on the object side of the annular groove 2 (i.e. the horizontal distance from the connection point of the object side extinction groove wall 21 of the annular groove 2 and the outer diameter surface G of the optical lens 1 to the connection point of the object side surface E of the optical lens 1 and the outer diameter surface G), the width C2 of the portion of the outer diameter surface on the image side of the annular groove 2 (i.e. the horizontal distance from the connection point of the image side extinction groove wall 22 of the annular groove 2 and the outer diameter surface G of the optical lens 1 to the connection point of the image side surface F of the optical lens 1 and the outer diameter surface G), the depth B of the annular groove 2, the included angle θ 1 between the object side extinction groove wall 21 and the radial direction of the optical lens 1, the included angle θ 2 between the image side extinction groove wall 22 and the radial direction of the optical lens 1, and the edge thickness D of the optical lens 1 satisfy the following relationships: d ═ C1+ C2+ C + B × (θ 1) + B × (θ 2). Thus, the position of the annular groove 2 can be controlled by adjusting the size of the dimension C1/C2, so that stray light at different angles is improved.

Referring to fig. 3, the cross-sectional shape (i.e. the shape projected along the optical axis) of the annular groove 2 of the present invention may be U-shaped (see fig. 3-1), rectangular (see fig. 3-2), step-shaped (see fig. 3-3), triangular (see fig. 3-4), trapezoidal (see fig. 1/2), or other trapezoid (see fig. 3-5). Therefore, the structure of the annular groove 2 can be adjusted according to the light path of the stray light, so that different types of stray light can be improved.

Referring to fig. 4, in order to realize a better extinction function, the present invention also performs various treatments on the surface (i.e., groove surface) of the annular groove 2. As shown in fig. 4a, the surface of the annular groove 2 has a rough layer 23 formed by laser atomization treatment or sand blast treatment. The roughness Ra of the rough layer 23 is 0.2 μm or more and less than 0.35 μm, and the thickness d1 is 2 μm or less. In this way, the rough layer 23 is more favorable for scattering light, thereby reducing stray light intensity. As shown in fig. 4b, the surface of the annular groove 2 has a color-plated layer 24 formed by a surface color-plating treatment. The thickness d2 of the color coating layer 24 is less than or equal to 0.001mm, and the surface reflectivity is less than or equal to 0.2%. Thus, the color coating 24 can reduce the reflectivity of the lens surface, and reduce the reflection intensity of light, so as to reduce the stray light. As shown in fig. 4c, the surface of the annular groove 2 has a blackened layer 25 formed by a blackening treatment. The coating of the black layer 25 may be uniformly applied to the surface of the annular groove 2 (see left side view of fig. 4 c), or may be impregnated into the annular groove 2 (see middle and right side view of fig. 4 c). Of course, since some paints may be under tension after filling, it may also happen that a depression is formed on the outside of the filled paint as shown in the right side view of fig. 4 c. The surface reflectivity of the blackened layer 25 of the utility model is less than or equal to 0.2 percent. When the above adhesion method is adopted, the thickness d3 of the black coating layer 25 is 0.005mm or more. Thus, the black coating 25 (or ink layer) can reduce the reflectivity of the lens surface, thereby reducing the light reflection intensity and reducing the stray light.

The parameters of each embodiment satisfying the above-described settings are shown in table 1 below:

TABLE 1

Referring to fig. 5, the outer shape of the optical lens 1 of the present invention may be (entirely) circular except as described in the above embodiments. Alternatively, as shown in fig. 6, the optical lens 1 may be formed into a "race track" shape by performing a trimming process to have two opposing trims K. Thus, the structure of various different lenses can meet various design requirements.

Referring to fig. 6, the lens module of the present invention includes a lens barrel 3 and at least one optical lens 1. The optical lens 1 is located inside the lens barrel 3, and the setting position thereof can be selected according to actual requirements. For example, in the present embodiment, the optical lens 1 is located at the most image side end of the lens barrel 3. Thus, the lens module has the optical lens 1 with the extinction function, so that stray light is less, and the lens quality is higher.

The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical lens (1) having an annular groove (2) on an outer diameter surface thereof, the annular groove (2) having an object-side extinction groove wall (21) adjacent to an object side and an image-side extinction groove wall (22) adjacent to an image side.

2. The optical lens (1) according to claim 1, characterized in that the outer diameter a of the optical lens (1) and the depth B of the annular groove (2) satisfy the following relationship: 0<2B/A < 0.8.

3. The optical lens (1) according to claim 1, characterized in that the groove bottom width C of the annular groove (2) and the edge thickness D of the optical lens (1) satisfy the following relation: 0< C/D < 0.8.

4. The optical lens (1) according to claim 1, wherein an angle θ 1 between the object-side extinction groove wall (21) and a radial direction of the optical lens (1) and an angle θ 2 between the image-side extinction groove wall (22) and the radial direction of the optical lens (1) respectively satisfy the following conditions: 0< θ 1<90 °, 0< θ 2<90 °.

5. The optical lens (1) according to any one of claims 1 to 4, characterized in that the groove bottom width C of the annular groove (2), the width C1 of the portion of the outer diameter surface on the object side of the annular groove (2), the width C2 of the portion of the outer diameter surface on the image side of the annular groove (2), the depth B of the annular groove (2), the angle θ 1 of the object side extinction groove wall (21) to the radial direction of the optical lens (1), the angle θ 2 of the image side extinction groove wall (22) to the radial direction of the optical lens (1), and the edge thickness D of the optical lens (1) satisfy the following relations: d ═ C1+ C2+ C + B × (θ 1) + B × (θ 2).

6. The optical lens (1) according to claim 1, characterized in that the surface of the annular groove (2) has a rough layer (23) formed by laser atomization or sandblasting;

the surface roughness Ra of the rough layer (23) is more than or equal to 0.2 mu m and less than 0.35 mu m, and the thickness d1 is less than or equal to 2 mu m.

7. The optical lens (1) according to claim 1, characterized in that the surface of the annular groove (2) has a layer of tinting (24) formed by a surface tinting process;

the thickness d2 of the color coating layer (24) is less than or equal to 0.001mm, and the surface reflectivity is less than or equal to 0.2%.

8. The optical lens (1) according to claim 1, characterized in that the surface of the annular groove (2) has a blackened layer (25) formed by a blackening treatment;

the coating of the black coating layer (25) is uniformly attached to the surface of the annular groove (2) or is filled in the annular groove (2);

the thickness d3 of the blackened layer (25) attached to the surface of the annular groove (2) is greater than or equal to 0.005 mm;

the surface reflectivity of the black coating (25) is less than or equal to 0.2%.

9. The optical lens (1) according to claim 1, characterized in that the cross-sectional shape of the annular groove (2) is U-shaped, rectangular, trapezoidal, triangular, stepped or trapezium-shaped.

10. The optical lens (1) according to claim 1, characterized in that the outer shape of the optical lens (1) is circular or has a cut edge.

11. The optical lens (1) according to claim 1, characterized in that the material of the optical lens (1) is resin, and is formed by injection molding;

the optical lens (1) and the annular groove (2) are integrally formed.

12. A lens module, characterized in that it comprises a lens barrel (3) and at least one optical lens (1) according to any one of claims 1-11 arranged in said lens barrel (3).

13. The lens module as claimed in claim 12, comprising one of the optical lenses (1), wherein the optical lens (1) is located at an image side end of the lens barrel (3).