CN116243460A

CN116243460A - 5p5000 ten thousand pixel lens

Info

Publication number: CN116243460A
Application number: CN202211631833.9A
Authority: CN
Inventors: 潘腾
Original assignee: Hubei Huaxin Photoelectric Co ltd
Current assignee: Hubei Huaxin Photoelectric Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-06-09
Anticipated expiration: 2042-12-19
Also published as: CN116243460B

Abstract

The invention provides a 5p5000 ten thousand pixel lens, 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 provided with positive focal power, the object side surface of the first lens is a convex surface at the paraxial region, and the image side surface of the first lens is a concave surface at the paraxial region; the second lens is provided with negative focal power, 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 provided with positive focal power, the object side surface of the third lens is concave at the paraxial region, and the image side surface of the third lens is convex at the paraxial region; a fourth lens having positive optical power; and a fifth lens having negative optical power. The invention supplements the types of 5000 ten thousand pixel lenses on the market, and compared with the mainstream 5P5000 ten thousand pixel lenses, the invention has simpler process flow, lower cost and lower manufacturing cost, but the performance is kept unchanged or even better.

Description

5p5000 ten thousand pixel lens

Technical Field

The invention relates to the field of optical lenses, in particular to a 5p5000 ten thousand-pixel lens.

Background

With the continuous development of the mobile phone industry, the pixels of the mobile phone lens are also continuously improved, the pixels of the main mobile phone in China generally reach tens of millions, and only a few manufacturers capable of producing on the market have few and the structures are mostly the same, so that the material cost is high.

Disclosure of Invention

Aiming at the technical problems existing in the prior art, the invention provides a 5p5000 ten thousand pixel lens, 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 provided with positive focal power, the object side surface of the first lens is a convex surface at the paraxial region, and the image side surface of the first lens is a concave surface at the paraxial region;

the second lens is provided with negative focal power, 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 provided with positive focal power, the object side surface of the third lens is concave at the paraxial region, and the image side surface of the third lens is convex at the paraxial region;

a fourth lens having positive optical power;

and a fifth lens having negative optical power.

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

Optionally, the first lens, the second lens, the third lens and the fourth lens are combined into a front group, the fifth lens is a rear group, the outer diameter of the lens of the front group is small, so that the lens has a smaller diameter of the mounting hole, the outer diameter of the lens of the rear group is larger, and the lens can be matched with a chip with a larger size and zooms.

Optionally, the distance between the first lens and the aperture stop is-0.4 mm to-0.5 mm.

Optionally, the front group focal length is f14, the back group focal length is f5, and the front group focal length and the back group focal length satisfy the condition:

0.9<|f14/f5|<1.1。

optionally, the focal length of the fifth lens is f5, the distance from the object plane of the first lens to the image plane of the lens is the total optical length TTL of the lens, and the conditions are satisfied:

0.5<|f5/TTL|<0.7。

optionally, the interval distance between the first lens and the second lens on the optical axis is T12, the interval distance between the second lens and the third lens on the optical axis is T23, the interval distance between the third lens and the fourth lens on the optical axis is T34, and the interval distance between the fourth lens and the fifth lens on the optical axis is T45, which satisfies the following conditions:

2＜(T12+T23+T34)/T45＜7。

the 5P5000 ten thousand pixel lens provided by the invention supplements the types of 5000 ten thousand pixel lenses on the market, and compared with the mainstream 5P5000 ten thousand pixel lens, the process flow is simpler, the cost is lower, but the performance is kept unchanged or even better.

Drawings

Fig. 1 is a schematic structural diagram of a 5p5000 ten thousand pixel lens according to a first embodiment of the present invention;

fig. 2 is a Ray fan diagram of a lens of the first embodiment;

FIG. 3 is a graph of relative illuminance of a lens of an exemplary embodiment;

FIG. 4 is a schematic diagram of curvature of field and distortion of a lens barrel according to a first embodiment;

fig. 5 is a graph of MTFs of the lens of the first embodiment at different frequencies;

fig. 6 is a schematic structural diagram of a 5p5000 ten thousand pixel lens according to a second embodiment of the present invention;

FIG. 7 is a Ray fan diagram of a lens according to a second embodiment;

fig. 8 is a relative illuminance diagram of a lens of the second embodiment;

fig. 9 is a field curvature and distortion diagram of a lens barrel of the second embodiment;

fig. 10 is a graph of MTF at different frequencies for the lens of the second embodiment;

fig. 11 is a schematic structural diagram of a 5p5000 ten thousand pixel lens according to a third embodiment of the present invention;

fig. 12 is a Ray fan diagram of a lens of the third embodiment;

fig. 13 is a relative illuminance diagram of a lens of the third embodiment;

FIG. 14 is a schematic diagram of curvature of field and distortion of a lens barrel according to a third embodiment;

fig. 15 is a graph of MTFs at different frequencies for the lens of the third embodiment.

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.

Fig. 1 is a schematic diagram of a 5p5000 ten thousand pixel lens according to a first embodiment of the present invention, which includes an aperture stop, a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side along an optical axis to an image side. The first lens is provided with positive focal power, the object side surface of the first lens is a convex surface at the paraxial region, and the image side surface of the first lens is a concave surface at the paraxial region; the second lens is provided with negative focal power, 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 provided with positive focal power, the object side surface of the third lens is concave at the paraxial region, and the image side surface of the third lens is convex at the paraxial region; a fourth lens having positive optical power; and a fifth lens having negative optical power.

The first lens, the second lens, the third lens and the fourth lens are combined into a front group, the fifth lens is a rear group, the front four lenses are front groups, the outer diameter of each lens is small, and the lens has a smaller mounting hole diameter. The latter lens is a rear group, the outer diameter of the lens is larger, and the lens can be matched with a chip with larger size and zooms. The whole lens system can meet high-definition imaging.

Specifically, starting from the object side, the element arrangement sequence from the optical axis to the image side is as follows:

first is an aperture stop. The first lens is then a positive lens, and is positioned very close (-0.4 to-0.5 mm) to the aperture stop, which is advantageous for controlling the object side surface outer diameter of the lens. The object space surface is convex, and the light beam converges after entering the first lens, so that the outer diameter of the image space surface of the first lens is controlled. The total focal power of the first lens is positive, and the beam is converged after exiting, so that the outer diameter of the object side surface of the second lens is controlled. The second lens is a negative lens, is close to the first lens, and is beneficial to controlling the outer diameter of the object side surface of the second lens. The object side surface of the second lens is a convex surface, and the beam converges after entering, so that the outer diameter of the image side surface of the second lens is controlled. The second lens has a concave surface on the surface, and after the light beam exits, the angle is enlarged, so that the rear group and the chip have enough image height to meet the requirements of the chip size and the CRA. The third lens is a positive lens and is bent to the object space, so that the overlarge incident angle of light rays at the position with a larger aperture is avoided. The fourth lens is a positive lens and is bent to the object space, so that the overlarge incident angle of light rays at the position with a larger aperture is avoided. And the fifth lens is a negative lens, and the larger aperture of the two surfaces is bent to the object space, so that the overlarge incident angle of light at the large aperture is avoided.

Wherein, the front four lenses are combined into a front group, and the front group focal length is f14. The fifth lens is a rear group, and the focal length of the rear group is f5. The following conditions are satisfied: 0.9< |f14/f5| <1.1.

The focal length of the fifth lens is f5, and the distance from the object plane of the first lens to the image plane of the lens is the total optical length TTL of the lens. The following conditions are satisfied: 0.5< |f5/TTL| <0.7.

The distance T12 between the first lens and the second lens on the optical axis, the distance T23 between the second lens and the third lens on the optical axis, the distance T34 between the third lens and the fourth lens on the optical axis, and the distance T45 between the fourth lens and the fifth lens on the optical axis satisfy 2 < (T12+T23+T34)/T45 < 7.

Wherein each lens data of the lens of the first embodiment is as follows in table 1.

TABLE 1

Wherein L1s1 is an object plane of the first lens, L1s2 is an image plane of the first lens, L2s1 is an object plane of the second lens, L2s2 is an image plane of the second lens, L3s1 is an object plane of the third lens, L3s2 is an image plane of the third lens, L4s1 is an object plane of the fourth lens, L4s2 is an image plane of the fourth lens, L5s1 is an object plane of the fifth lens, L5s2 is an image plane of the fifth lens, and cone coefficients k and aspherical coefficients A4-a20 of the object planes and the image planes of the first lens L1 to the fifth lens L5 are shown in table 2.

TABLE 2

The conditions that the optical parameters of the first to fifth lenses satisfy are shown in table 3.

TABLE 3 Table 3

f14＝3.37	f5＝3.307	\|f14/f5\|＝1.019
			EFL＝4.25	TTL＝4.9	\|f5/TTL\|＝0.675
T12＝0.191	T23＝0.221
			T34＝0.566	T45＝0.426	(T12+T23+T34)/T45＝2.314

Fig. 2 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. 3 is a graph of relative illuminance of a lens illustrating an embodiment, the higher the value thereof, the better the relative illuminance. Fig. 4 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. 5 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. 6 is a schematic structural diagram of a 5p5000 ten thousand pixel lens 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 coefficients of the lenses, the aspherical coefficients and the optical parameters satisfy different conditions.

The respective lens data of the lens of the second embodiment are as follows in table 4.

TABLE 4 Table 4

The cone coefficients k and the aspherical coefficients A4 to a20 of the object and image planes of the first lens L1 to the fifth lens L5 of the lens barrel of the second embodiment are shown in table 5.

TABLE 5

The optical parameters of the lens barrel of the second embodiment satisfy the conditions shown in table 6.

TABLE 6

f14＝2.968	f5＝2.878	\|f14/f5\|＝1.03
			EFL＝3.976	TTL＝4.9	\|f5/TTL\|＝0.587
T12＝0.119	T23＝0.319
			T34＝0.65	T45＝0.162	(T12+T23+T34)/T45＝6.72

Fig. 7 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. 8 is a graph of relative illuminance of a lens of an exemplary embodiment, with higher values indicating better 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 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. 11 is a 5p5000 ten thousand pixel lens of the third embodiment, which has the same structure as the first embodiment and the second embodiment except 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 lens of the third embodiment are as follows in table 7.

TABLE 7

The cone coefficients k and the aspherical coefficients A4 to a20 of the object and image planes of the first lens L1 to the fifth lens L5 of the lens barrel of the third embodiment are shown in table 8.

TABLE 8

The optical parameters of the lens barrel of the third embodiment satisfy the conditions shown in table 9.

TABLE 9

f14＝3.206	f5＝2.93	\|f14/f5\|＝1.09
			EFL＝4.249	TTL＝4.9	\|f5/TTL\|＝0.598
T12＝0.168	T23＝0.269
			T34＝0.571	T45＝0.15	(T12+T23+T34)/T45＝6.72

Fig. 12 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. 13 is a graph of relative illuminance of a lens of an exemplary embodiment, with higher values indicating better relative illuminance. Fig. 14 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. 15 is a graph showing MTFs of the lens barrel of the third embodiment at different frequencies, wherein the smoother the curve, the higher the value, and the better the imaging effect of the lens barrel.

The 5P5000 ten thousand pixel lens provided by the invention supplements the types of 5000 ten thousand pixel lenses on the market, and compared with the mainstream 5P5000 ten thousand pixel lens, the process flow is simpler, the cost is lower, but the performance is kept unchanged or even better. The lens meets high-definition imaging, is small in distortion and high in relative illumination, reduces component cost and assembly cost, improves production efficiency, is lower in lens material cost, is matched with a new design framework and a new film system, achieves the framework tolerance of 1.5um, adopts a stacked structure, and achieves the assembly yield of about 90%.

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. A 5p5000 ten thousand pixel lens, characterized by comprising an aperture stop, 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;

a fourth lens having positive optical power;

and a fifth lens having negative optical power.

2. The 5p5000 ten thousand pixel lens of claim 1, wherein the first lens, the second lens, the third lens and the fourth lens are combined into a front group, the fifth lens is a rear group, the outer diameter of the lens of the front group is small, the lens has a smaller diameter of a mounting hole, the outer diameter of the lens of the rear group is larger, and the lens can be matched with a chip with a larger size and zooms.

3. The 5p5000 ten thousand pixel lens barrel of claim 1, wherein the first lens is at a distance of-0.4 mm to-0.5 mm from the aperture stop.

4. The 5p5000 ten thousand pixel lens of claim 2, wherein a front group focal length is f14, a back group focal length is f5, the front group focal length and the back group focal length satisfy the condition:

0.9<|f14/f5|<1.1。

5. the 5p5000 ten thousand pixel lens of claim 1, wherein the focal length of the fifth lens is f5, the distance from the object plane of the first lens to the image plane of the lens is the total optical lens length TTL, and the condition is satisfied:

0.5<|f5/TTL|<0.7。

6. the 5p5000 ten thousand pixel lens of claim 1, wherein a spacing distance of the first lens and the second lens on the optical axis is T12, a spacing distance of the second lens and the third lens on the optical axis is T23, a spacing distance of the third lens and the fourth lens on the optical axis is T34, and a spacing distance of the fourth lens and the fifth lens on the optical axis is T45, satisfying the condition:

2＜(T12+T23+T34)/T45＜7。