CN116774396B

CN116774396B - Five-piece-type architecture micro mobile phone lens

Info

Publication number: CN116774396B
Application number: CN202310749867.6A
Authority: CN
Inventors: 郭贵苏; 陈秀梅
Original assignee: Hubei Huaxin Photoelectric Co ltd
Current assignee: Hubei Huaxin Photoelectric Co ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2024-05-07
Anticipated expiration: 2043-06-21
Also published as: CN116774396A

Abstract

The invention provides a five-lens-type miniature mobile phone lens which comprises five lenses, an aperture diaphragm, a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the aperture diaphragm starts from an object space to an image space along an optical axis. The invention designs corresponding structures and corresponding parameters for five lenses, and the camera has small volume, can be suitable for more complex and various scenes, and effectively reduces the system cost; the small head lens is installed in a size so as to be used under various devices and meet the design requirements of clear imaging and relatively small distortion influence.

Description

Five-piece-type architecture micro mobile phone lens

Technical Field

The invention relates to the field of optical devices, in particular to a five-piece-type architecture micro mobile phone lens.

Background

With the rapid development of mobile phone technology, mobile phone lenses are gradually developed toward miniaturization and smaller head sizes. The technical problems of high-definition imaging and viewpoint depth of a small-head lens are solved while miniaturization and small-head size are realized, and the problems still need to be emphasized so far.

Disclosure of Invention

The invention provides a five-piece type architecture miniature mobile phone lens aiming at the technical problems in the prior art, which comprises an aperture diaphragm, a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis;

The first lens is a positive lens, the object side surface of the first lens is convex at the paraxial region, the change from convex to concave exists from the paraxial region to the peripheral region, the image side surface of the first lens is concave at the paraxial region, and the change from concave to convex exists from the paraxial region to the peripheral region;

The second lens is a positive lens, the object side surface of the second lens is a convex surface at the paraxial region, and the image side surface of the second lens is a concave surface at the paraxial region;

the third lens is a negative lens, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface;

The fourth lens is a negative lens, the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface;

the fifth lens is a negative lens, and the object side surface of the fifth lens is a concave surface and the image side surface of the fifth lens is a convex surface.

On the basis of the technical scheme, the invention can also make the following improvements.

Optionally, the first lens, the second lens and the third lens have a combined focal length of F123, and the total focal length of the lens is EFL, which satisfies the following requirements:

1.15<F123/EFL<1.3。

Optionally, the total focal length of the second lens, the third lens and the fourth lens is F234, and the total focal length of the lens is EFL, which satisfies the following requirements:

0.58<F234//EFL<0.92。

optionally, the total focal length of the lens is EFL, and the total length of the lens is TTL, which satisfies the following requirements:

0.78<EFL/TTL<0.83。

optionally, the focal lengths of the second lens and the third lens are F23, and the total focal length of the lens is EFL, which satisfies the following conditions:

-5.85<F23/EFL<-2.8。

optionally, the focal length of the first lens is F1, and the focal lengths of the second lens and the third lens are F23, which satisfies the following conditions:

-5.72<F23/F1<-3.05。

The five-piece-type architecture miniature mobile phone lens provided by the invention comprises five lenses, and corresponding structures and corresponding parameters are designed for the five lenses, so that the camera is small in size and applicable to more complex and diversified scenes, and the system cost is effectively reduced; the small head lens is installed in a size so as to be used under various devices and meet the design requirements of clear imaging and relatively small distortion influence.

Drawings

Fig. 1 is a schematic structural diagram of a lens of a five-chip architecture micro mobile phone according to a first embodiment of the present invention;

Fig. 2 is a schematic diagram of distortion and curvature of field of light at any field of view of the five-chip architecture micro-mobile phone lens according to the first embodiment at the wavelength defined by Wave;

Fig. 3 is a schematic diagram showing the contrast between each field of view and the center brightness of the lens of the five-chip architecture micro-mobile phone according to the first embodiment;

fig. 4 is a schematic diagram of FFT modulation transfer function data of a five-chip architecture micro-mobile phone lens according to the first embodiment, in which the defocus varies at a specific frequency;

fig. 5 is a schematic structural diagram of a lens of a five-chip architecture micro mobile phone according to a second embodiment of the present invention;

Fig. 6 is a schematic diagram of distortion and curvature of field of light at any field of view of a five-chip architecture micro-mobile phone lens according to the second embodiment at a wavelength defined by Wave;

Fig. 7 is a schematic diagram showing a comparison between each field of view and the center brightness of a lens of a five-chip-type micro-mobile phone according to a second embodiment;

fig. 8 is a schematic diagram of FFT modulation transfer function data of a lens of a five-chip architecture micro-mobile phone according to a second embodiment, in which the lens is defocus-changed at a specific frequency.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. In addition, the technical features of each embodiment or the single embodiment provided by the invention can be combined with each other at will to form a feasible technical scheme, and the combination is not limited by the sequence of steps and/or the structural composition mode, but is necessarily based on the fact that a person of ordinary skill in the art can realize the combination, and when the technical scheme is contradictory or can not realize, the combination of the technical scheme is not considered to exist and is not within the protection scope of the invention claimed.

In order to reduce the installation size of the lens, so as to achieve the purpose that the opening of the lens on the screen or the panel of the mobile phone is as small as possible in appearance, and to meet the purposes of high-definition imaging, smooth distortion and no mutation, and simultaneously, the total length of the lens is sufficiently short, referring to fig. 1, a five-piece-type architecture micro mobile phone lens is provided, the mobile phone lens comprises five lenses, from an object side, along an optical axis to an image side, and the arrangement order of elements is as follows: an aperture STOP (STOP), a first lens (L1), a second lens (L2), a third lens (L3), a first fourth (L4), and a fifth lens (L5).

The first lens element (L1) has a positive lens element with a convex object-side surface at a paraxial region thereof, and a concave image-side surface at a paraxial region thereof, wherein the object-side surface of the first lens element changes from convex at a paraxial region thereof to concave at a peripheral region thereof. The second lens (L2) is a positive lens, the object side surface of which is convex at the paraxial region thereof, and the image side surface of which is concave at the paraxial region thereof. The third lens (L3) is a negative lens, and the object side surface of the third lens is a concave lens and the image side surface of the third lens is a convex lens. The fourth lens (L4) is a negative lens, and the object side surface of the fourth lens is a concave lens and the image side surface of the fourth lens is a convex lens. The fifth lens (L5) is a negative lens, and has a concave object-side surface and a convex image-side surface.

The total focal length of the first lens (L1), the second lens (L2) and the third lens (L3) is F123, the total focal length of the second lens (L2), the third lens (L3) and the fourth lens (L4) is F234, the total focal length of the lens is EFL, the total focal length of the lens is TTL, the focal length of the second lens (L2) and the third lens (L3) is F23, and the focal length of the first lens (L1) is F1.

Each parameter satisfies the following condition:

1.15<F123/EFL<1.3；

0.58<F234//EFL<0.92；

0.78<EFL/TTL<0.83；

-5.85<F23/EFL<-2.8；

-5.72<F23/F1<-3.05。

the data of each lens of the five-chip architecture micro mobile phone lens of the first embodiment is shown in table 1 below.

TABLE 1

The conditions that the optical parameters of the first to fifth lenses satisfy are shown in table 2.

TABLE 2

F123/EFL＝	1.2271	F23/EFL＝	-2.8944
				F234/EFL＝	0.6711	F23/F1＝	-3.1417
EFL/TTL＝	0.8119

Fig. 2 is a schematic diagram of distortion and curvature of field of light at any field of view of the five-chip architecture micro-phone lens according to the first embodiment at the wavelength defined by Wave. Fig. 3 is a schematic diagram showing the contrast between each field of view and the center brightness of the lens of the five-chip architecture micro-mobile phone according to the first embodiment. Fig. 4 is a schematic diagram of FFT modulation transfer function data of a lens of a five-chip architecture micro-mobile phone according to the first embodiment, in which the lens is defocus-changed at a specific frequency.

Fig. 5 is a schematic structural diagram of a lens of a five-chip-type micro mobile phone according to a second embodiment, which has the same structure as that of the first embodiment, and is different in that: the lens data, the cone coefficient, the aspherical coefficient and the optical parameter of each lens are different.

The data of each lens of the five-chip architecture micro mobile phone of the second embodiment is shown in table 3 below.

TABLE 3 Table 3

The conditions that the optical parameters of the first to fifth lenses satisfied are shown in table 4.

TABLE 4 Table 4

F123/EFL＝	1.2182	F23/EFL＝	-5.8113
				F234/EFL＝	0.8802	F23/F1＝	-5.6726
EFL/TTL＝	0.8001

Fig. 6 is a schematic diagram of distortion and curvature of field of light at any field of view of a five-chip architecture micro-phone lens according to the second embodiment at a wavelength defined by Wave. Fig. 7 is a schematic diagram showing a comparison between each field of view and the center brightness of the lens of the five-chip architecture micro-mobile phone according to the second embodiment. Fig. 8 is a schematic diagram of FFT modulation transfer function data of a lens of a five-chip architecture micro-mobile phone according to a second embodiment, in which the lens is defocus-changed at a specific frequency.

The five-piece-type architecture miniature mobile phone lens provided by the embodiment of the invention designs corresponding structures and parameters for each lens, has small camera volume, can be suitable for more complex and various scenes, and effectively reduces the system cost. The small head lens is installed in a size so as to be used under various devices and meet the design requirements of clear imaging and relatively small distortion influence.

In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The five-piece type architecture miniature mobile phone lens is characterized by comprising an aperture diaphragm, a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis;

The fifth lens is a negative lens, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface;

The first lens, the second lens and the third lens have a combined focal length of F123, and the total focal length of the lens is EFL, which satisfies the following conditions: 1.15< F123/EFL <1.3;

The total focal length of the second lens, the third lens and the fourth lens is F234, and the total focal length of the lens is EFL, which satisfies the following conditions:

0.58<F234//EFL<0.92；

the total focal length of the lens is EFL, the total length of the lens is TTL, and the total focal length of the lens meets the following requirements:

0.78<EFL/TTL<0.83；

the focal length of the second lens and the third lens is F23, and the total focal length of the lens is EFL, which satisfies the following conditions:

-5.85<F23/EFL<-2.8；

the focal length of the first lens is F1, the focal lengths of the second lens and the third lens are F23, and the requirements are satisfied:

-5.72<F23/F1<-3.05。