CN116299973B - 3P type 500 ten thousand pixel mobile phone lens - Google Patents

Abstract

The invention provides a 3 p-type 500-ten-thousand-pixel mobile phone lens, which comprises an aperture diaphragm, a first lens, a second lens and a third lens, wherein the aperture diaphragm is arranged from an object space to an image space 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 negative lens, and is close to the first lens, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a convex surface; 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 three lenses of the mobile phone lens realize good light spot uniformity, good light divergence effect and high transmittance of the lenses; the mobile phone lens can meet high-definition imaging, is simple in structure and easy to manufacture, is small in size, occupies small space of a mobile phone panel, is short in total length, meets the ultrathin requirement of a mobile phone, and achieves a high-quality imaging effect.

Description

3P type 500 ten thousand pixel mobile phone lens

Technical Field

The invention relates to the field of optical lenses, in particular to a3 p-type 500-ten-thousand-pixel mobile phone lens.

Background

At present, the mobile phones are thinner and thinner, the shooting quality is higher and higher, and the front panel of the mobile phones is required to occupy the space as small as possible. Based on the requirement, a mobile phone lens capable of meeting the requirement needs to be designed.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a 3p type 500 ten thousand-pixel mobile phone lens, which consists of an aperture diaphragm, a first lens, a second lens and a third lens group 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 a convex surface, and the image side surface of the first lens is a concave surface;

The second lens is a positive lens, is close to the first lens, has a concave object side surface and a convex image side surface;

the third lens element has a negative lens element with a convex object-side surface at a paraxial region thereof, and a concave image-side surface at a paraxial region thereof.

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

Optionally, focal lengths of the first lens and the second lens are F1 and F2, respectively, which satisfy:

F2/F1＝0.4215。

optionally, the total focal length of the mobile phone lens is EFL, and the relationship between the total focal length of the mobile phone lens and the focal length F2 of the second lens is:

F2/EFL＝0.5719。

Optionally, the focal lengths of the second lens and the third lens are F23, and the relationship between the focal lengths and the total focal length EFL of the mobile phone lens is:

F23/EFL＝3.0833。

optionally, the total length of the mobile phone lens is TTL, and the total focal length EFL of the mobile phone lens satisfies the relationship:

EFL/TTL＝0.938。

The 3p type 500 ten thousand-pixel mobile phone lens provided by the invention comprises three lenses, so that the light spot uniformity, the light divergence effect and the transmittance of the lenses are good; the mobile phone lens can meet high-definition imaging, is simple in structure and easy to manufacture, is small in size, occupies small space of a mobile phone panel, is short in total length, meets the ultrathin requirement of a mobile phone, and achieves a high-quality imaging effect.

Drawings

Fig. 1 is a3 p-type 500 ten thousand pixel mobile phone lens according to a first embodiment of the present invention;

fig. 2 is a diagram of the relative illuminance of the lens of the mobile phone according to the first embodiment;

Fig. 3 is a schematic diagram of curvature of field and distortion of a lens of a mobile phone according to a first embodiment;

fig. 4 is a Ray fan diagram of a mobile phone lens according to a first embodiment;

fig. 5 is an out-of-focus MTF plot of the lens of the mobile phone of the first embodiment;

Fig. 6 is a graph of MTFs of the lens of the mobile phone at different frequencies according to the first embodiment;

FIG. 7 is a diagram of a3 p-type 500 ten thousand pixel lens barrel for a mobile phone according to a second embodiment of the present invention;

fig. 8 is a relative illuminance diagram of a lens of a mobile phone according to a second embodiment;

fig. 9 is a schematic diagram of curvature of field and distortion of a lens of a mobile phone according to a second embodiment;

fig. 10 is a Ray fan diagram of a lens of a mobile phone according to a second embodiment;

fig. 11 is an out-of-focus MTF plot of a lens of a cell phone of a second embodiment;

fig. 12 is a graph of MTFs at different frequencies for a second embodiment of a handset lens;

FIG. 13 is a diagram of a3 p-type 500 ten thousand pixel lens barrel for a mobile phone according to a third embodiment of the present invention;

Fig. 14 is a relative illuminance diagram of a lens of a mobile phone according to a third embodiment;

fig. 15 is a schematic diagram of curvature of field and distortion of a lens of a mobile phone according to a third embodiment;

fig. 16 is a Ray fan diagram of a lens of a mobile phone according to a third embodiment;

fig. 17 is an out-of-focus MTF plot of a third embodiment of a handset lens;

Fig. 18 is a graph of MTFs at different frequencies for a third embodiment of a handset lens.

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 diameter of the lens mounting hole so as to achieve the purposes of ensuring that the lens opening on the screen or the panel of the mobile phone is as small as possible in appearance, meeting the requirements of high-definition imaging and larger chip size and enabling the total length of the lens to be short enough, the invention provides a 3p type 500-ten-thousand-pixel mobile phone lens, and the 3p type 500-ten-thousand-pixel mobile phone lens of a plurality of embodiments is described below.

Fig. 1 is a3 p-type 500-ten-thousand-pixel mobile phone lens provided in a first embodiment of the present invention, which is composed of an aperture STOP (STOP), a first lens (L1), a second lens (L2) and a third lens (L3) from an object side along an optical axis to an image side.

The first lens (L1) is a positive lens, the object side surface of the first lens is a convex surface, the image side surface of the first lens is a concave surface, and the object side surface of the first lens is a convex surface, so that large relative illumination can be realized. The second lens (L2) is a positive lens, the object side surface of the second lens is a convex surface, the image side surface of the second lens is a concave surface, and the outer diameter of the object side surface of the second lens is also beneficial to control. The third lens (L3) is a negative lens, wherein the object-side surface of the third lens is convex at the paraxial region, and the change from convex to concave is present from the paraxial region to the peripheral region, and the image-side surface of the third lens is concave at the paraxial region, and the change from concave to convex is present from the paraxial region to the peripheral region.

The focal lengths of the first lens (L1), the second lens (L2) and the third lens (L3) are F1, F2 and F3 respectively, the focal lengths of the second lens and the third lens are F23, the total focal length of the mobile phone lens is EFL, and the total length of the mobile phone lens is TTL.

The parameters of the above lenses meet the following conditions:

F2/EFL＝0.5719；

F23/EFL＝3.0833；

F2/F1＝0.4215；

EFL/TTL＝0.938。

the data of each lens of the mobile phone lens of the first embodiment are shown in table 1 below.

TABLE 1

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

TABLE 2

F2/EFL＝	0.5719
		F23/EFL＝	3.0833
F2/F1＝	0.4215
		EFL/TTL＝	0.938

Fig. 2 is a graph of the relative illuminance of the lens barrel of the first embodiment, and the higher the value is, the better the relative illuminance is. Fig. 3 is a schematic diagram of field curvature and distortion of a lens barrel according to the first embodiment, wherein the left side is field curvature, the right side is distortion, and the closer to the center, the better the imaging effect. Fig. 4 is a Ray fan diagram of the lens barrel of the first embodiment, wherein the smaller the numerical value is, the better the imaging effect is. Fig. 5 is a defocused MTF graph of the lens barrel of the first embodiment, the more concentrated the curve, the smaller the field curvature, the smaller the spherical aberration coma, and the higher the MTF value. Fig. 6 is a graph showing MTFs of the lens of the first embodiment at different frequencies, wherein the smoother the curve, the higher the value, and the better the imaging effect of the lens.

Fig. 7 is a schematic structural diagram of a3 p-type 500-ten thousand-pixel mobile phone lens according to a second embodiment, which has the same structure as that of the first embodiment, and is different from the first embodiment in that: the lens data, the cone coefficients of the lenses, the aspherical coefficients and the optical parameters satisfy different conditions.

The respective lens data of the mobile phone lens of the second embodiment are as follows in table 3.

TABLE 3 Table 3

The conditions that the optical parameters of the first lens to the third lens satisfy are shown in table 4.

TABLE 4 Table 4

F2/EFL＝	-0.7726
		F23/EFL＝	-1.9507
F2/F1＝	-1.1007
		EFL/TTL＝	0.689

Fig. 8 is a graph of the relative illuminance of the lens barrel of the second embodiment, where the higher the value, the better the relative illuminance. Fig. 9 is a schematic diagram of field curvature and distortion of a lens barrel according to the second embodiment, wherein the left side is field curvature, the right side is distortion, and the closer to the center, the better the imaging effect. Fig. 10 is a Ray fan diagram of a lens barrel according to the second embodiment, wherein the smaller the numerical value is, the better the imaging effect is. Fig. 11 is a defocused MTF graph of the lens barrel of the second embodiment, the more concentrated the curve, the smaller the field curvature, the smaller the spherical aberration coma, and the higher the MTF value. Fig. 12 is a graph showing MTF at different frequencies for the lens of the second embodiment, wherein the smoother the curve, the higher the value, and the better the imaging effect of the lens.

Fig. 13 is a schematic structural diagram of a 3 p-type 500-ten thousand-pixel mobile phone lens according to a third embodiment, which has the same structure as the first and second embodiments, and is different from the first and second embodiments in that: the lens data, the cone systems of the lenses, and the aspherical coefficients are different from each other, and the conditions satisfied by the optical parameters are different.

The respective lens data of the mobile phone lens of the third embodiment are as follows in table 5.

TABLE 5

The conditions that the optical parameters of the first lens to the third lens satisfy are shown in table 6.

TABLE 6

Fig. 14 is a graph of the relative illuminance of the lens barrel of the third embodiment, which shows that the higher the value is, the better the relative illuminance is. Fig. 15 is a schematic diagram of field curvature and distortion of a lens barrel according to the third embodiment, wherein the left side is field curvature, the right side is distortion, and the closer to the center, the better the imaging effect. Fig. 16 is a Ray fan diagram of a lens barrel according to the third embodiment, wherein the smaller the numerical value is, the better the imaging effect is. Fig. 17 is a defocus MTF graph of the lens barrel of the third embodiment, the more concentrated the curve, the smaller the field curvature, the smaller the spherical aberration coma, and the higher the MTF value. Fig. 18 is a graph showing MTF at different frequencies for the lens of the third embodiment, wherein the smoother the curve, the higher the value, and the better the imaging effect of the lens.

The 3p type 500-ten thousand-pixel mobile phone lens provided by the invention is based on three lenses, so that the light spot uniformity, the light divergence effect and the transmittance of the lens are good; the mobile phone lens can meet high-definition imaging, is simple in structure and easy to manufacture, is small in size, occupies small space of a mobile phone panel, is short in total length, meets the ultrathin requirement of a mobile phone, and achieves a high-quality imaging effect.

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)

1. A3 p-type 500-ten-thousand-pixel mobile phone lens is characterized by comprising an aperture diaphragm, a first lens, a second lens and a third lens group 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 a convex surface, and the image side surface of the first lens is a concave surface;

The second lens is a positive lens, is close to the first lens, has a concave object side surface and a convex image side surface;

the third lens element has a negative lens element with a convex object-side surface at a paraxial region thereof, a convex-to-concave surface change from paraxial region thereof to peripheral region thereof, a concave image-side surface at a paraxial region thereof, and a concave-to-convex surface change from paraxial region thereof to peripheral region thereof;

the focal lengths of the first lens and the second lens are F1 and F2 respectively, which satisfy the following conditions:

F2/F1＝0.4215；

The total focal length of the mobile phone lens is EFL, and the relationship between the EFL and the focal length F2 of the second lens is as follows:

F2/EFL＝0.5719；

the focal length of the second lens and the third lens is F23, and the total focal length EFL of the mobile phone lens meets the following relation:

F23/EFL＝3.0833；

The total length of the mobile phone lens is TTL, and the total focal length EFL of the mobile phone lens meets the following relation:

EFL/TTL＝0.938。