CN210803761U - Plastic lens and optical imaging lens - Google Patents

Abstract

The utility model provides a plastic lens and optical imaging camera lens. The plastic lens includes that the center towards the plastic lens sets gradually: an outer structure non-location area; a structure-locating region; an inner structure non-location area; at least one surface of the outer side structure non-positioning area and the inner side structure non-positioning area is a laser atomization surface; the object side surface of the optical effective area and the image side surface of the optical effective area are aspheric. The utility model provides an optical imaging lens have stray light to influence great problem among the prior art.

Description

Plastic lens and optical imaging lens

Technical Field

The utility model relates to an optical lens imaging technology field particularly, relates to a plastic lens and optical imaging lens.

Background

In recent years, with the advent of the media age, portable electronic products having an image function have been rapidly developed, and image devices mounted on the portable electronic products have been rapidly developed. With the development of technology, people have increasingly high requirements on the quality, pixels, resolution, and the like of image lenses. The existence of stray light can affect the image plane contrast, so that the imaging quality of an optical system is reduced, and the image quality is mainly represented by that some colored light spots are increased on an image plane, so that the quality of an image lens can be improved to a great extent by weakening the stray light.

The method for weakening the stray light is to change or weaken the light transmitted to the surface of the non-effective diameter of the lens, and the common method for weakening the stray light of the image lens is to optimize the structure of the lens or add a shielding object, but when the size of the image lens is smaller and smaller, the functions of optimizing the structure and adding the shielding object are greatly reduced, and the problem of the stray light cannot be effectively improved. In summary, it is one of the most important topics to improve the imaging quality of the image lens to meet the needs of people for high-level imaging devices.

That is to say, the optical imaging lens in the prior art has a problem that stray light has a large influence.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a plastic lens and an optical imaging lens, which can solve the problem of the prior art that the optical imaging lens has a large stray light effect.

In order to achieve the above object, according to an aspect of the present invention, there is provided a plastic lens, the plastic lens including a plurality of lenses arranged in sequence toward a center of the plastic lens: an outer structure non-location area; a structure-locating region; an inner structure non-location area; at least one surface of the outer side structure non-positioning area and the inner side structure non-positioning area is a laser atomization surface; the object side surface of the optical effective area and the image side surface of the optical effective area are aspheric.

Further, the roughness Ra of the laser atomization surface is more than or equal to 0.2 micrometer and less than or equal to 0.35 micrometer.

Furthermore, the plastic lens also comprises an optical axis, the optical axis passes through the center of the plastic lens and is vertical to the extending direction of the plastic lens, and a non-obtuse angle A formed by the laser atomization surface and the optical axis is more than or equal to 40 degrees and less than or equal to 90 degrees.

Further, the structure positioning area is perpendicular to the optical axis.

Further, the thickness d of the laser atomization surface is less than or equal to 2 microns.

Furthermore, the plastic lens further comprises an outer diameter surface, the outer diameter surface is connected with the object side surface of the outer structure non-positioning area and the image side surface of the outer structure non-positioning area, and the outer diameter surface is of an annular structure and is parallel to the optical axis of the plastic lens.

Furthermore, the laser atomization surface is formed by injection molding of a mold.

According to another aspect of the present invention, there is provided an optical imaging lens, the optical imaging lens includes a lens barrel, a plurality of light shielding elements and a plurality of lenses, at least one of the plurality of lenses is the plastic lens.

Further, the number of lenses is at least three.

Furthermore, the structure positioning area of the plastic lens is supported by the lens or the shading element adjacent to the plastic lens.

By applying the technical scheme of the utility model, the plastic lens comprises an outer side structure non-positioning area, a structure positioning area, an inner side structure non-positioning area and an optical effective area which are sequentially arranged towards the center of the plastic lens, and at least one surface of the outer side structure non-positioning area and the inner side structure non-positioning area is a laser atomization surface; the object side surface of the optical effective area and the image side surface of the optical effective area are aspheric.

The laser atomization surface is arranged on at least one surface of the outer side structure non-positioning area and the inner side structure non-positioning area, so that light can be effectively absorbed, reflection of the light is reduced, generation of stray light is greatly reduced, and imaging definition of the plastic lens is improved. The object side surface of the optical effective area and the image side surface of the optical effective area are set to be aspheric surfaces, so that the curvature from the center of the optical effective area to the edge of the optical effective area is continuously changed, and the plastic lens has a better curvature radius and has the advantage of improving the distortion aberration and the astigmatic aberration. The aspheric surface can greatly eliminate aberration during imaging and improve imaging quality.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram illustrating an overall structure of a plastic lens according to an alternative embodiment of the present invention; and

FIG. 2 shows an enlarged view at Q of FIG. 1;

FIG. 3 is a schematic diagram illustrating a position of the plastic lens of FIG. 1 where a laser fogging surface can be mounted;

FIG. 4 is a schematic diagram illustrating an angle relationship between the inner structure non-positioning region and the optical axis of the plastic lens of FIG. 1;

FIG. 5 is a schematic diagram illustrating an angle relationship between a structural positioning region of the plastic lens of FIG. 1 and an optical axis;

FIG. 6 is a state diagram showing the thickness of the laser atomizing surface on the plastic lens of FIG. 1;

fig. 7 shows a schematic structural diagram of an optical imaging lens according to an alternative embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. an outer structure non-location area; 20. a structure-locating region; 30. an inner structure non-location area; 40. an optically active area; 50. a lens barrel; 60. an optical axis; 70. an outer diameter surface; 80. a plastic lens.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

In order to solve the great problem of stray light influence that exists among the prior art optical imaging camera lens, the utility model provides a plastic lens and optical imaging camera lens.

As shown in fig. 1 to 6, the plastic lens 80 includes an outer structure non-positioning region 10, a structure positioning region 20, an inner structure non-positioning region 30 and an optical effective region 40, which are sequentially disposed toward the center of the plastic lens 80, wherein at least one surface of the outer structure non-positioning region 10 and the inner structure non-positioning region 30 is a laser atomization surface; the object-side surface of the optically effective area 40 and the image-side surface of the optically effective area 40 are aspheric.

By setting at least one surface of the outer structure non-positioning region 10 and the inner structure non-positioning region 30 to be a laser atomization surface, light can be effectively absorbed, reflection of light is reduced, generation of stray light is greatly reduced, and imaging definition of the plastic lens 80 is improved. The object-side surface of the optically effective area 40 and the image-side surface of the optically effective area 40 are aspheric, so that the curvature of the center of the optically effective area 40 to the edge of the optically effective area 40 is continuously variable, and the plastic lens 80 has a better curvature radius, thereby improving the distortion aberration and the astigmatic aberration. The aspheric surface can greatly eliminate aberration during imaging and improve imaging quality.

Specifically, the roughness Ra of the laser atomized surface is 0.2 to 0.35 μm. The roughness of the laser atomization surface is 0.5-0.35 micron, so that the reflection of light can be greatly reduced, the generation of stray light is reduced, and the imaging quality of the plastic lens 80 is improved.

As shown in fig. 1 to 6, the plastic lens 80 further includes an optical axis 60, the optical axis 60 passes through the center of the plastic lens 80 and is perpendicular to the extending direction of the plastic lens 80, and a non-obtuse angle a formed by the laser atomizing surface and the optical axis 60 is greater than or equal to 40 degrees and less than or equal to 90 degrees. The non-obtuse angle A formed by the laser atomization surface and the optical axis 60 is set between 40 degrees and 90 degrees, so that the blocking of the laser atomization surface to stray light can be increased to a greater extent, the reflection of the stray light is reduced, the imaging quality of the plastic lens 80 is improved, and the actual molding of the laser atomization surface is facilitated.

As shown in fig. 5, the structure localization zone 20 is perpendicular to the optical axis 60. This arrangement facilitates the mounting of the plastic lens 80 to the location to be mounted, such that the structure locating portion 20 and the location to be mounted cooperate with each other.

Specifically, the thickness d of the laser atomization surface is less than or equal to 2 microns. It should be noted that the laser atomization surface is uneven in the present application, and the thickness d of the laser atomization surface refers to the distance between the highest point and the lowest point on the laser atomization surface. The arrangement enables the plastic lens 80 to achieve good stray light suppression and simultaneously not affect the imaging quality of the plastic lens 80.

As shown in fig. 1 to fig. 6, the plastic lens 80 further includes an outer diameter surface 70, the outer diameter surface 70 connects the object-side surface of the outer structure non-positioning region 10 and the image-side surface of the outer structure non-positioning region 10, and the outer diameter surface 70 is annular and parallel to the optical axis 60 of the plastic lens 80. The outer diameter surface 70 abuts against the to-be-installed position, so that the plastic lens 80 is stably installed on the to-be-installed position, the plastic lens 80 is prevented from shaking, and the working stability of the plastic lens 80 is improved.

Specifically, the laser atomization surface is formed by injection molding of a mold. It should be noted that the mold for injection molding the plastic lens 80 has a laser atomization surface, and when the plastic lens 80 is injection molded, the laser atomization surface is directly injection molded without adding a process, thereby greatly reducing the production cost.

It should be noted that, in the specific embodiment shown in fig. 3 and 4, the deepened line is a laser atomization surface. In the embodiment shown in fig. 6, the hollow squares represent the laser atomized surface, in order to facilitate the visualization of the thickness d of the laser atomized surface.

As shown in fig. 7, the optical imaging lens includes a lens barrel 50, a plurality of light shielding elements, and a plurality of lenses, at least one of which is the plastic lens 80. The plastic lens 80 is mounted on the lens barrel 50, and the structure positioning area 20 of the plastic lens 80 and the outer diameter surface 70 of the plastic lens 80 are both abutted against the lens barrel 50 to reduce the shaking of the plastic lens 80, so that the plastic lens 80 is stably fixed on the lens barrel 50, and the plastic lens 80 stably works.

Optionally, there are at least three lenses.

Specifically, the structure positioning region 20 of the plastic lens 80 is abutted against the lens or shading element adjacent to the plastic lens 80. The arrangement enables the plastic lens 80 to be stably mounted on the lens barrel 50, and increases the working stability of the plastic lens 80.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred 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 (10)

1. A plastic lens, characterized in that the plastic lens (80) comprises, in sequence towards the center of the plastic lens (80):

an outer structure non-location area (10);

a structure-locating region (20);

an inner structure non-locating region (30); at least one surface of the outer side structure non-positioning area (10) and the inner side structure non-positioning area (30) is a laser atomization surface;

an optically effective area (40), an object side surface of the optically effective area (40) and an image side surface of the optically effective area (40) being aspheric.

2. The plastic lens of claim 1, wherein the roughness Ra of the laser-atomized surface is greater than or equal to 0.2 micrometers and less than or equal to 0.35 micrometers.

3. The plastic lens of claim 1, wherein the plastic lens (80) further comprises an optical axis (60), the optical axis (60) passes through the center of the plastic lens (80) and is perpendicular to the extending direction of the plastic lens (80), and the non-obtuse angle A formed by the laser atomizing surface and the optical axis (60) is greater than or equal to 40 degrees and less than or equal to 90 degrees.

4. A plastic lens according to claim 3, characterized in that the structure-locating section (20) is perpendicular to the optical axis (60).

5. The plastic lens of claim 1, wherein the thickness d of the laser-atomized surface is less than or equal to 2 μm.

6. A plastic lens according to claim 1, wherein the plastic lens (80) further comprises an outer diameter surface (70), the outer diameter surface (70) connecting the object-side surface of the outer structure-free zone (10) and the image-side surface of the outer structure-free zone (10), the outer diameter surface (70) being annular and parallel to the optical axis (60) of the plastic lens (80).

7. A plastic lens according to claim 1, wherein the laser-atomized surface is injection molded from a mold.

8. An optical imaging lens, characterized in that it comprises a lens barrel (50), a plurality of shading elements and a plurality of lenses, at least one of which is a plastic lens (80) according to any one of claims 1 to 7.

9. The optical imaging lens of claim 8, characterized in that the number of lenses is at least three.

10. Optical imaging lens according to claim 8, characterized in that the structural locating region (20) of the plastic lens (80) bears against the lens or the shading element adjacent to the plastic lens (80).

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