CN115903197A

CN115903197A - Optical lens and terminal equipment

Info

Publication number: CN115903197A
Application number: CN202111316020.6A
Authority: CN
Inventors: 袁正超; 马力
Original assignee: Oneplus Technology Shenzhen Co Ltd
Current assignee: Oneplus Technology Shenzhen Co Ltd
Priority date: 2021-08-18
Filing date: 2021-11-08
Publication date: 2023-04-04

Abstract

The application discloses optical lens and terminal equipment relates to electronic equipment technical field. The optical lens comprises a light guide element, a first lens group, a second lens group and a third lens group in sequence from an object side to an image side; the light guide element comprises a light incident surface, a light reflecting surface and a light emergent surface facing the first lens group, and light at the object side enters from the light incident surface, is emitted by the light reflecting surface and then sequentially enters the first lens group, the second lens group and the third lens group through the light emergent surface; the first lens group includes a first lens and a second lens; the second lens group includes a third lens, a fourth lens and a fifth lens; the third lens group includes a sixth lens and a seventh lens; the optical lens satisfies the relation: the agent (R6 + R10)/(R2 + R5) is more than or equal to 1.5 and less than or equal to 2.5 or R2/R5 is more than or equal to 1.5 and less than or equal to 3. The optical lens can reach the optimal balance state in the zooming process, which is beneficial to realizing larger zoom ratio, not only improving the imaging quality, but also shortening the total length of the optical lens.

Description

Optical lens and terminal equipment

Technical Field

The application relates to the technical field of electronic equipment, in particular to an optical lens and terminal equipment.

Background

At present, with the rapid development of electronic terminal products, in order to obtain good shot images under the condition of different shooting distances of electronic terminal products such as mobile phones, the existing electronic equipment is generally equipped with a plurality of cameras such as wide-angle zoom, standard zoom, telephoto zoom and the like, and the continuous zooming process is realized by combining an electronic amplification technology. In the prior art, a fixed lens group, a zoom lens group, a compensation lens group and an aberration stabilizing lens group are usually adopted to meet the shooting zooming requirement, but the requirements of shooting imaging quality and thinning cannot be met, which is not beneficial to thinning of electronic terminal products such as mobile phones and the like.

Disclosure of Invention

In view of the above, an object of the present application is to overcome the deficiencies in the prior art, and the present application provides a light and thin optical zoom lens with good imaging quality.

In a first aspect, the present application provides:

an optical lens comprises a light guide element, a first lens group, a second lens group and a third lens group in sequence from an object side to an image side;

the light guide element comprises a light incident surface, a light reflecting surface and a light emergent surface facing the first lens group, and the light at the object side enters from the light incident surface, is emitted by the light reflecting surface and then sequentially enters the first lens group, the second lens group and the third lens group through the light emergent surface;

the first lens group includes a first lens and a second lens;

the second lens group includes a third lens, a fourth lens, and a fifth lens;

the third lens group includes a sixth lens and a seventh lens;

the optical lens satisfies the relation: 1.5 ≦ (R6 + R10)/(R2 + R5) | ≦ 2.5 or 1.5 ≦ R2/R5 ≦ 3, where R2 is the image-side radius of curvature of the first lens, R5 is the object-side radius of curvature of the third lens, R6 is the image-side radius of curvature of the third lens, and R10 is the image-side radius of curvature of the fifth lens.

In some embodiments of the present application, the optical lens satisfies: beta is more than or equal to 2, wherein, beta = _f Length/f _{Short length} Beta is the optical zoom ratio, f _{Is long and long} Is the focal length of the optical lens in long focus, f _{Short length} The focal length of the optical lens is in short focus.

In some embodiments of the present application, the optical lens satisfies: TTL/f _{Is long and long} Is less than or equal to 1.1, wherein TTL is the optical total length of the optical lens, f _{Long and long} The focal length of the optical lens is in long focus.

In some embodiments of the present application, the first lens group has negative refractive power; the second lens group has positive refractive power; the third lens group has negative refractive power.

In some embodiments of the present application, the first lens is fixed relative to the second lens; the third lens, the fourth lens and the fifth lens are relatively fixed; the sixth lens and the seventh lens are relatively fixed.

In some embodiments of the present application, both the image-side surface and the object-side surface of the first lens element are concave, the image-side surface of the second lens element is concave, and the object-side surface of the second lens element is convex; the image side surface of the third lens is a convex surface, the object side surfaces of the fourth lens and the fifth lens are concave surfaces, and the image side surfaces of the third lens, the fourth lens and the fifth lens are convex surfaces; the object side surfaces of the sixth lens element and the seventh lens element are concave surfaces, and the image side surfaces of the sixth lens element and the seventh lens element are convex surfaces.

In some embodiments of the present application, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all aspheric lenses.

In some embodiments of the present application, any two of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are made of glass, and the remaining five lenses are made of plastic; or any three of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are made of glass, and the rest four lenses are made of plastic.

In some embodiments of the present application, during a process of the optical lens changing from a short focus state to a long focus state, a distance between the first lens group and the second lens group gradually decreases, and a distance between the third lens group and an imaging surface gradually increases.

In some embodiments of the present application, the first lens group moves in a linear manner with respect to the second lens group, and the third lens group moves in a non-linear manner with respect to the imaging surface; or the first lens group and the second lens group move in a nonlinear manner, and the third lens group and the imaging surface move in a linear manner.

In some embodiments of the present application, the optical lens satisfies: FNO is more than or equal to 3 and less than or equal to 5, and the FNO is the aperture value of the optical lens.

In some embodiments of the present application, a maximum distance between the image-side surface of the sixth lens element and the object-side surface of the seventh lens element is d, and satisfies the relation: d is more than or equal to 0 and less than or equal to 3mm.

In some embodiments of the present application, the light guide element is a prism, and the light incident surface and the light emitting surface of the prism are both spherical surfaces.

In a second aspect, the present application further provides a terminal device including the optical lens according to any of the above embodiments.

The beneficial effect of this application is: the application provides an optical lens, through the light steering back with the object side direction of leaded light component, kicks into first lens group, second lens group and third lens group in proper order, when satisfying the relational expression: when the agent (R6 + R10)/(R2 + R5) is more than or equal to 1.5 and less than or equal to 2.5 or R2/R5 is more than or equal to 1.5 and less than or equal to 3, the optical lens achieves the optimal balance state in the zooming process, the realization of larger zoom ratio is facilitated, the imaging quality can be improved, the total length of the optical lens can be shortened, and the volume of the optical lens is reduced. When the optical lens is applied to the terminal equipment, the structural design can meet the requirement of lightness and thinness of the terminal equipment, and the structure is simple.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic optical path diagram of an optical lens according to some embodiments of the present application;

fig. 2 is a schematic optical path diagram of an optical lens according to a first embodiment of the present application;

fig. 3 shows a schematic view of an astigmatism curve and a distortion curve of a first embodiment of the present application;

FIG. 4 shows a schematic diagram of a chromatic spherical aberration curve of a first embodiment of the present application;

fig. 5 shows a schematic optical path diagram of an optical lens according to a second embodiment of the present application;

fig. 6 shows a schematic view of an astigmatism curve and a distortion curve for a second embodiment of the present application;

FIG. 7 shows a schematic diagram of a chromatic spherical aberration curve of a second embodiment of the present application;

fig. 8 is a schematic optical path diagram of an optical lens according to a third embodiment of the present application;

fig. 9 shows a schematic view of an astigmatism curve and a distortion curve of a third embodiment of the application;

fig. 10 is a schematic optical path diagram of an optical lens according to a fourth embodiment of the present application;

fig. 11 shows a schematic view of an astigmatism curve and a distortion curve of a fourth embodiment of the present application;

FIG. 12 shows a schematic diagram of a chromatic spherical aberration curve of a fourth embodiment of the present application;

fig. 13 is a schematic optical path diagram of an optical lens according to a fifth embodiment of the present application;

fig. 14 shows a schematic view of an astigmatism curve and a distortion curve of a fifth embodiment of the present application;

fig. 15 shows a schematic diagram of a chromatic spherical aberration curve of a fifth embodiment of the present application.

Description of the main element symbols:

100-an optical lens; 10-a prism; 11-the light incident surface; 12-a reflective surface; 13-a light-emitting surface; 20-a first lens group; 21-a first lens; 22-a second lens; 30-a second lens group; 31-a third lens; 32-a fourth lens; 33-a fifth lens; 40-a third lens group; 41-sixth lens; 42-a seventh lens; 50-optical axis; 60-image plane.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Generally, a lens module of a terminal device is designed by using 4 lens groups or 5 to 9 lens structures, and can achieve 2 to 5 times of focal length. In order to obtain high quality image quality, a sufficiently large optical space is required to balance different aberrations, including chromatic aberration and monochromatic aberration (including astigmatism, distortion, spherical aberration, etc.). The large optical space is contrary to the requirement of thinning the lens module, which is not favorable for thinning the electronic terminal products such as mobile phones.

In order to solve the above problem, embodiments of the present application provide an optical lens and a terminal device, and the following describes embodiments of the present application with reference to the drawings in the embodiments of the present application.

The embodiment of the application relates to an optical lens and a terminal device, wherein the optical lens is a zoom lens for daily use of the terminal device. The terminal equipment can be equipment with a camera shooting function, such as a smart phone, a tablet personal computer, various wearable equipment, virtual Reality (VR) equipment, monitoring equipment, vehicle-mounted equipment, smart home and the like.

The following is a brief description of the concepts involved in the above embodiments:

lens: the device is a component which makes the scenery light pass through the lens by utilizing the refraction principle of the lens and forms a clear image on a focusing plane.

Aberration: this means that the results obtained by non-paraxial ray tracing and the results obtained by paraxial ray tracing do not coincide with each other in the lens, and the deviation from the ideal state of gaussian optics (first order approximation theory or paraxial ray). Aberrations fall into two broad categories: chromatic aberration and monochromatic aberration. Chromatic aberration is a function of the refractive index of the lens material as a function of wavelength, and dispersion of light of different wavelengths passing through the lens due to different refractive indices is known as normal dispersion, and dispersion of light with refractive index decreasing with increasing wavelength is known as negative dispersion (or anomalous dispersion). Monochromatic aberration is aberration that occurs even when monochromatic light is highly produced, and is divided into two categories, that is, "blurring" and "distorting" an image. The former type has spherical aberration, astigmatism, etc., and the latter type has curvature of field, distortion, etc. The chromatic aberration includes axial chromatic aberration and off-axis chromatic aberration. Axial chromatic aberration refers to a direction along the optical axis, where the focus of different colored light is different because the refractive index of light for different wavelengths of the lens is different.

Focal length: the distance from the main plane of the lens to the corresponding focal point.

Effective Focal Length (EFL): for thick lenses (lenses with a non-negligible thickness), or optical lenses with several lenses or mirrors, the focal length is usually expressed in terms of effective focal length, to distinguish it from the commonly used parameters.

Total Track Length (TTL) of lens: the optical total length refers to the distance from the first surface of the lens to the image surface in the lens.

Refractive power: which may also be referred to as diopter, or power, is the unit of measurement of the power of a lens or curved mirror. Diopter is equal to the difference between the convergence of the image space beam and the convergence of the object space beam, and represents the capability of the lens to deflect light. If the refractive power is positive, the lens has a converging effect, such as a convex lens. If the refractive power is negative, the lens has a diverging effect, such as a concave lens.

Visual field: which is an area where a subject can be seen on the screen of the terminal device.

The method comprises the following steps: the side of the lens closest to the object is the object side.

An image side: the side of the lens closest to the image side is the image side.

As shown in fig. 1, an optical lens 100 according to an embodiment of the present application includes, in order from an object side to an image side, a light guide element, a first lens group 20, a second lens group 30, and a third lens group 40.

The light guide element comprises a light incident surface 11, a light reflecting surface 12 and a light emergent surface 13 facing the first lens group 20, wherein light at the object side enters from the light incident surface 11 and is emitted by the light reflecting surface 12, and then sequentially enters the first lens group 20, the second lens group 30 and the third lens group 40 through the light emergent surface 13.

Specifically, the first lens group 20 includes a first lens 21 and a second lens 22. The second lens group 30 includes a third lens 31, a fourth lens 32, and a fifth lens 33. The third lens group 40 includes a sixth lens 41 and a seventh lens 42.

It is understood that the light guiding element, the first lens 21, the second lens 22, the third lens 31, the fourth lens 32, the fifth lens 33, the sixth lens 41, and the seventh lens 42 are arranged in this order from the object side to the image side. Wherein, for example, the light guide element and the first lens group 20 are arranged as a fixed group, the second lens group 30 is a variable magnification group, and the third lens group 40 is a compensation group. The optical lens 100 satisfies the relation: the agent (R6 + R10)/(R2 + R5) | is not less than 1.5 and not more than 2.5 or not less than 1.5 and not more than R2/R5 and not more than 3, wherein R2 is the curvature radius of the image side surface of the first lens 21, R5 is the curvature radius of the object side surface of the third lens 31, R6 is the curvature radius of the image side surface of the third lens 31, and R10 is the curvature radius of the image side surface of the fifth lens 33. Under the condition of satisfying the above relational expression, the optical lens 100 reaches an optimal balance state in the zooming process, which is beneficial to realizing a larger zoom ratio, not only improving the imaging quality, but also shortening the total length of the optical lens 100 and reducing the volume of the optical lens 100. Due to the structural design, when the optical lens 100 is applied to a terminal device, the requirement of lightness and thinness of the terminal device can be met, and the structure is simple.

In some embodiments of the present application, optionally, the first lens group 20 has negative refractive power, and the image-side surface of the first lens element 21 and the image-side surface of the second lens element 22 are concave, so that they have a diverging effect. The second lens group 30 has positive refractive power, and the image side surfaces of the third lens element 31, the fourth lens element 32 and the fifth lens element 33 are all convex surfaces, so that the image side surfaces have a converging effect, and the total length of the optical lens 100 can be shortened by focusing light rays, thereby reducing the volume of the optical lens 100. The third lens group 40 has negative refractive power. Through the surface shape and the refractive power of each lens element, the optical lens system 100 can satisfy the requirements of high pixel and good imaging effect.

In some embodiments of the present application, optionally, the first lens 21 and the second lens 22 are fixed relatively, and the first lens group 20 may be arranged as a fixed group. The third lens 31, the fourth lens 32 and the fifth lens 33 are fixed relatively, so that the third lens group 40 can be arranged into a variable power group, and the whole movement can be realized in the zooming process. The sixth lens 41 and the seventh lens 42 are relatively fixed, specifically, a preset distance may be designed between the sixth lens 41 and the seventh lens 42 according to requirements, for example, an image side surface of the sixth lens 41 and an object side surface of the seventh lens 42 are designed to be attached to each other, or a distance between the image side surface of the sixth lens 41 and the object side surface of the seventh lens 42 may be designed to be a preset distance, for example, 2mm. Meanwhile, the third lens group 40 may be disposed as a compensation group.

It is understood that the distance between the sixth lens 41 and the seventh lens 42 is designed to be a preset distance, so that the maximum distance between the image-side surface of the sixth lens 41 and the object-side surface of the seventh lens 42 is d, and the relation is satisfied: d is more than or equal to 0 and less than or equal to 3mm.

In the above embodiment, the first lens group 20, the second lens group 30 and the third lens group 40 may be arranged such that, in the process of changing the optical lens 100 from the short-focus state to the long-focus state, the distance between the first lens group 20 and the second lens group 30 is controlled to gradually decrease, and the distance between the third lens group 40 and the imaging surface is controlled to gradually increase. Wherein, during the process of changing from the short focus state to the long focus state, the first lens group 20 and the second lens group 30 can move in a linear manner to realize the gradual decrease of the distance between the first lens group 20 and the second lens group 30. The third lens group 40 moves in a non-linear manner with respect to the imaging surface to achieve a gradual increase in the distance between the third lens group 40 and the imaging surface.

Of course, it is also possible to achieve a gradual decrease in the distance between the first lens group 20 and the second lens group 30 by moving between the first lens group 20 and the second lens group 30 in a non-linear manner. The third lens group 40 moves in a linear manner with respect to the imaging surface, so that the distance between the third lens group 40 and the imaging surface gradually increases. And in the process of converting the short focus state into the long focus state, the focal length is kept to be continuously changed, so that the imaging quality of the optical lens meets the requirement of high-definition imaging in the conversion process.

Meanwhile, in order to ensure the high-definition imaging quality, the relation is satisfied: under the condition that the absolute value of (R6 + R10)/(R2 + R5) is more than or equal to 1.5 and less than or equal to 2.5 or R2/R5 is more than or equal to 1.5 and less than or equal to 3, the optical lens also satisfies the following conditions: TTL/f _{Long and long} Not less than 1.1, beta is not less than 2, wherein beta = f _{Long and long} /f _{Short length} . Therefore, the optical lens 100 can reach an optimal balance state in the zooming process, which is beneficial to realizing a larger zoom ratio, and not only can ensure the imaging quality, but also can shorten the total length of the optical lens 100, thereby thinning the optical lens 100. In some embodiments of the present disclosure, as shown in fig. 1, the first lens element 21 has a concave image-side surface and a concave object-side surface, the second lens element 22 has a concave image-side surface, and the second lens elementThe object-side surface of the lens 22 is convex; the image-side surface of the third lens element 31 is a convex surface, the object-side surfaces of the fourth lens element 32 and the fifth lens element 33 are concave surfaces, and the image-side surfaces of the third lens element 31, the fourth lens element 32 and the fifth lens element 33 are convex surfaces; the object side surfaces of the sixth lens element 41 and the seventh lens element 42 are concave surfaces, and the image side surfaces of the sixth lens element 41 and the seventh lens element 42 are convex surfaces. Through the surface type design of each lens, the lens has refractive power correspondingly, and the imaging effect with high pixels can be ensured.

In some embodiments of the present application, specifically, the first lens 21, the second lens 22, the third lens 31, the fourth lens 32, the fifth lens 33, the sixth lens 41, and the seventh lens 42 are all aspheric lenses.

In any of the above embodiments of the present application, optionally, any two of the first lens 21, the second lens 22, the third lens 31, the fourth lens 32, the fifth lens 33, the sixth lens 41, and the seventh lens 42 are made of glass, and the remaining five lenses are made of plastic. For example, the third lens 31 and the fifth lens 33 are made of glass, and the rest of the lenses are made of plastic, which is beneficial to saving the cost of the optical lens 100.

It is understood that the first lens 21 and the sixth lens 41 may be made of glass, and the rest of the lenses may be made of plastic. Two lenses can be installed as required and are made of glass, and the rest five lenses are made of plastic materials and are combined.

Alternatively, any three of the first lens 21, the second lens 22, the third lens 31, the fourth lens 32, the fifth lens 33, the sixth lens 41, and the seventh lens 42 may be made of glass, and the remaining four lenses may be made of plastic. For example, the first lens 21, the third lens 31, and the fifth lens 33 are made of glass, and the remaining lenses are made of plastic.

The existing lens group uses a plastic lens, and the plastic lens is easy to absorb moisture after being heated at high temperature or high temperature and high humidity, so that the lens changes to cause function attenuation. And in the above-mentioned lens embodiment mode of adopting glass material of this application, can also utilize lens material characteristic and material collocation, improve the lens and absorb moisture the problem of absorbing water, promote optical lens and terminal equipment to the adaptability of environment, promote the imaging quality.

In any of the above embodiments, at least one of the lenses made of glass has a refractive index greater than 1.6. Therefore, the lens edge cutting enables the environmental reliability of the optical lens to be optimal, the aberration of the optical lens to reach the optimal balance state, the realization of larger zoom ratio is facilitated, the imaging quality is improved, and the total length of the system can be shortened.

As shown in fig. 1, in some embodiments of the present application, the light guide element is a prism 10, and both the light incident surface 11 and the light emitting surface 13 of the prism 10 are spherical surfaces. The prism 10 is made of glass, the light incident surface 11 of the prism 10 faces one side of a shot object, the light emergent surface 13 faces the object side surface of the first lens 21, and the light reflecting surface 12 of the prism 10 emits light entering from the light incident surface 11 and then emits the light through the light emergent surface 13 to sequentially enter the first lens 21, the second lens 22, the third lens 31, the fourth lens 32, the fifth lens 33, the sixth lens 41 and the seventh lens 42 along an optical axis and finally images on an imaging surface. By the arrangement of the prism 10, the light can be turned, the total length of the optical lens 100 can be reduced, and the optical lens is easy to be thinned.

Specific examples are as follows:

example 1

As shown in fig. 2, 3 and 4, the present embodiment provides an optical lens 100 including, in order from an object side to an image side, a prism 10, a first lens 21, a second lens 22, a third lens 31, a fourth lens 32, a fifth lens 33, a sixth lens 41 and a seventh lens 42. The first lens group 20 has negative refractive power, the second lens group 30 has positive refractive power, and the third lens group 40 has negative refractive power.

The third lens 31 and the fifth lens 33 are made of glass, and the first lens 21, the second lens 22, the fourth lens 32, the sixth lens 41 and the seventh lens 42 are made of plastic.

Wherein | (R6 + R10)/(R2 + R5) | =2.083; R2/R5=1.634. Satisfy the relation: the agent (R6 + R10)/(R2 + R5) is more than or equal to 1.5 and less than or equal to 2.5 or R2/R5 is more than or equal to 1.5 and less than or equal to 3.

In the present embodiment, the prism 10 is a triangular prism 10, which is a spherical prism 10. The first lens 21, the second lens 22, the third lens 31, the fourth lens 32, the fifth lens 33, the sixth lens 41, and the seventh lens 42 are all aspheric lenses.

The aspheric surface profile can satisfy, but is not limited to, the following even aspheric surface formula:

/>

wherein X is the distance rise from the vertex of the aspheric surface when the aspheric surface is at the position with the height of r along the optical axis direction; r is the vertical distance between a point on the aspheric curve and the optical axis, c is the aspheric vertex spherical curvature, and K is the cone coefficient.

Specific parameters of the optical lens 100 in this embodiment are shown in tables 1 and 2, where the unit of the radius of curvature R, the thickness, and the radius (effective aperture) of the lens Y is millimeters (mm).

TABLE 1

TABLE 2

Noodle sequence number	K	a1	a2	a3	a4	a5	a6
									1	0	0	0	0	0	0	0
2	0	0	0	0	0	0	0
								3	0	0	0	0	0	0	0
4	18.58768637	0	0.0003696	6.75094E-05	-5.68191E-07	-1.55204E-06	1.87042E-07
								5	5.731209105	0	-0.001126051	-0.000179606	-1.57407E-05	4.46369E-07	9.40155E-08
6	1.059752606	0	-5.70892E-05	-6.03972E-05	4.3132E-06	4.90408E-07	1.76096E-07
								7	-4.062929673	0	-0.000127566	6.90427E-05	1.73494E-06	1.0059E-06	4.48015E-08
8	-0.209070689	0	-0.000503781	6.38235E-05	3.07096E-06	3.09575E-07	8.41347E-08
								9	-11.97206803	0	-0.000382011	2.18314E-06	1.49263E-06	1.36992E-07	-1.5388E-08
10	-3807.224319	0	0.00024807	-5.55194E-05	-3.09498E-06	-4.68033E-08	3.53376E-08
								11	0	0	-0.001149255	7.42819E-05	1.48764E-05	1.65772E-06	1.99592E-07
12	0.336373206	0	0.000493552	8.99481E-05	1.23029E-05	1.45645E-06	-2.1156E-07
								13	-2.009507176	0	0.001013463	5.89809E-05	-1.60986E-06	-6.29431E-07	2.24251E-07
14	-138.9193564	0	0.000683932	1.9075E-05	-1.8693E-05	-3.03299E-06	3.38119E-07
								15	43.85566785	0	0.001621521	0.000212719	-1.46409E-05	-6.31979E-06	7.91331E-07
16	1.534358569	0	0.000133854	0.001244503	3.77102E-05	-8.89894E-05	3.83964E-05
								17	4.672478287	0	-0.000656761	0.000340273	-4.2277E-05	3.65509E-06	1.35968E-07

In the present embodiment, the aperture value (FNO, F-number) of the optical lens 100 is 3.26 to 5mm, and the effective focal length value is 10.1 to 22.6mm. Wherein, the distance D1 between the first lens 21 and the second lens 22 on the optical axis is D1=7.891mm in the short focus state; in the mid-focus state, D1=4.409mm; in the tele state, D1=0.997mm. A distance D2 on the optical axis between the second lens 22 and the third lens 31, D2=1.401mm in the short focus state; in the mid-focus state, D2=1.575mm; in the tele state, D2=2.232mm. Changing the F number from 3 to 5 in the process of changing the optical lens from the short-focus state to the long-focus state, and simultaneously meeting the condition that beta is more than or equal to 2, wherein beta = F _{Is long and long} /f _{Short length} . The diameter of the first lens aperture can be kept constant during the change from short to long focus due to the change in F-number. The basic parameter designs according to the above tables 1 and 2, and the astigmatism curves, distortion curves, and chromatic aberration curves shown in fig. 3 and 4 are combined, so that a good imaging effect can be achieved, and the optical lens 100 can be ensured to be thinAnd (4) forming.

Example 2

As shown in fig. 5, 6 and 7, the present embodiment provides an optical lens 100 including, in order from an object side to an image side, a prism 10, a first lens 21, a second lens 22, a third lens 31, a fourth lens 32, a fifth lens 33, a sixth lens 41 and a seventh lens 42. The first lens group 20 has negative refractive power, the second lens group 30 has positive refractive power, and the third lens group 40 has negative refractive power.

Wherein, | (R6 + R10)/(R2 + R5) | =1.583; R2/R5=2.126. Satisfies the relation: the agent (R6 + R10)/(R2 + R5) is more than or equal to 1.5 and less than or equal to 2.5 or R2/R5 is more than or equal to 1.5 and less than or equal to 3.

wherein, X is the distance rise from the vertex of the aspheric surface when the aspheric surface is at the position with the height of r along the optical axis direction; r is the perpendicular distance between the point on the aspheric curve and the optical axis, c is the aspheric vertex spherical curvature, and K is the cone coefficient.

Specific parameters of the optical lens 100 in this embodiment are shown in tables 3 and 4, where the unit of the radius of curvature R, the thickness, and the radius (effective aperture) of the lens Y is millimeters (mm).

TABLE 3

TABLE 4

Noodle sequence number	K	a1	a2	a3	a4	a5	a6
									1	0	0	0	0	0	0	0
2	0	0	0	0	0	0	0
								3	0	0	0	0	0	0	0
4	15.3759282	0	0.001002963	1.67924E-05	-5.78207E-06	-8.81358E-07	1.48859E-07
								5	4.81631609	0	-0.001118175	-0.000227492	-1.68833E-05	2.83334E-07	-1.8095E-07
6	1.185859278	0	-3.01775E-05	-5.45726E-05	5.27916E-06	3.04098E-07	2.3006E-07
								7	-3.649661885	0	-0.000144574	4.8737E-05	-2.38336E-06	1.23596E-06	1.94904E-07
8	-0.183698568	0	-0.00038635	7.01153E-05	4.5165E-06	4.81101E-07	3.38472E-08
								9	-10.0097407	0	-0.000388898	2.16468E-05	2.87755E-06	1.99666E-07	-2.6625E-08
10	-4373.233324	0	0.000271871	-8.63998E-05	-3.071E-06	7.9018E-07	1.57659E-07
								11	0	0	-0.000968396	0.000136373	1.78634E-05	1.26147E-06	1.40745E-07
12	0.006577214	0	0.00077646	0.000120842	1.11809E-05	1.3843E-07	-4.7055E-07
								13	1.791666446	0	0.000823627	2.20271E-05	-5.9524E-08	-3.0406E-07	-1.2642E-07
14	-427.6061142	0	0.000136533	-0.000144388	-2.13434E-05	-1.60081E-07	1.7703E-07
								15	34.20620212	0	0.002614389	-0.000146379	-6.22917E-06	-1.74396E-06	6.97436E-07
16	2.218714924	0	-0.002187274	3.51395E-05	-1.05336E-05	-1.51212E-05	3.52996E-06
								17	11.69778888	0	-0.003448875	0.000106814	-3.45475E-06	-1.20427E-06	1.34235E-07

In the present embodiment, the aperture value of the optical lens 100 is 3.25 to 5mm, and the effective focal length is 10.1 to 22.7mm. Wherein, the distance D1 between the first lens 21 and the second lens 22 on the optical axis is D1=7.249mm in the short focus state; in the middle focus state, D1=4.116mm; in the tele state, D1=0.998mm. A distance D2 on the optical axis between the second lens 22 and the third lens 31, D2=2.089mm in the short focus state; in mid-focus state, D2=2.480mm; in the tele state, D2=3.947mm. Changing the F number from 3 to 5 in the process of changing the optical lens from the short-focus state to the long-focus state, and simultaneously satisfying the condition that beta is more than or equal to 2, wherein beta = F _{Long and long} /f _{Short length} . The diameter of the first lens aperture can be kept constant during the change from short to long focus due to the change in F-number. By designing according to the basic parameters in tables 3 and 4 and combining the astigmatism curves, distortion curves, and chromatic aberration curves shown in fig. 6 and 7, a good imaging effect can be achieved, and the optical lens 100 can be made thin.

Example 3

As shown in fig. 8 and 9, the present embodiment provides an optical lens 100 including, in order from an object side to an image side, a prism 10, a first lens 21, a second lens 22, a third lens 31, a fourth lens 32, a fifth lens 33, a sixth lens 41, and a seventh lens 42. The first lens group 20 has negative refractive power, the second lens group 30 has positive refractive power, and the third lens group 40 has negative refractive power.

Wherein, | (R6 + R10)/(R2 + R5) | =2.028; R2/R5=1.540. Satisfies the relation: the agent (R6 + R10)/(R2 + R5) is more than or equal to 1.5 and less than or equal to 2.5 or R2/R5 is more than or equal to 1.5 and less than or equal to 3.

wherein X is the distance rise from the vertex of the aspheric surface when the aspheric surface is at the position with the height of r along the optical axis direction; r is the perpendicular distance between the point on the aspheric curve and the optical axis, c is the aspheric vertex spherical curvature, and K is the cone coefficient.

Specific parameters of the optical lens 100 in this embodiment are shown in tables 5 and 6, where the unit of the radius of curvature R, the thickness, and the radius (effective aperture) of the lens Y is millimeters (mm).

TABLE 5

TABLE 6

Number of noodles	K	a1	a2	a3	a4	a5	a6
									1	0	0	0	0	0	0	0
2	0	0	0	0	0	0	0
								3	0	0	0	0	0	0	0
4	18.21237101	0	0.000917713	-5.63255E-05	-4.33724E-06	3.82568E-07	4.54132E-08
								5	4.429966283	0	-0.001263138	-0.000261104	-2.03197E-05	7.80331E-07	-3.0584E-08
6	0.059274925	0	-0.000266403	-7.32903E-05	5.93833E-06	2.11657E-07	3.47768E-07
								7	-6.995732251	0	-0.000261795	2.61905E-05	-3.8881E-06	1.96942E-06	2.13633E-07
8	-0.075193008	0	-2.32924E-05	3.94372E-05	3.89807E-06	3.4171E-07	-4.6996E-08
								9	-9.775918843	0	-0.000301397	2.93526E-05	1.59168E-06	-4.58452E-08	-7.0877E-08
10	-113.5756068	0	-0.000960006	-0.000232036	-1.31796E-05	2.40342E-07	1.00889E-07
								11	0	0	-0.001298102	4.5116E-05	1.63042E-06	-1.08741E-06	-8.23E-08
12	-0.264233099	0	0.000904049	0.000176411	1.33573E-05	-2.31981E-07	-6.2191E-07
								13	-8.333722331	0	0.00106919	5.48729E-05	1.62228E-05	1.2382E-06	-5.0329E-07
14	-44.0447858	0	0.001709617	0.000153945	-2.59197E-05	1.4773E-05	-2.096E-06
								15	11.07644668	0	0.006032053	0.000137564	9.9513E-05	8.16911E-06	-3.7911E-07
16	3.460660438	0	-0.007840593	9.55387E-05	0.000131947	-5.32544E-06	-1.548E-06
								17	242.7403575	0	-0.012436389	0.000600715	-1.79446E-05	-4.04406E-06	2.50717E-07

In the present embodiment, the aperture value of the optical lens 100 is 3.21 to 5mm, and the effective focal length value is 10.1 to 22.6mm. Wherein, the distance D1 between the first lens 21 and the second lens 22 on the optical axis is D1=7.019mm in the short focus state; in the mid-focus state, D1=4.080mm; in the tele state, D1=1mm. A distance D2 on the optical axis between the second lens 22 and the third lens 31, D2=6.2mm in the short focus state; in the mid-focus state, D2=6.824mm; in the tele state, D2=9.22mm. Changing the F number from 3 to 5 in the process of changing the optical lens from the short-focus state to the long-focus state, and simultaneously meeting the condition that beta is more than or equal to 2, wherein beta = F _{Long and long} /f _{Short length} . The diameter of the first lens aperture can be kept constant during the change from short to long focus due to the change in F-number. By designing according to the basic parameters in tables 5 and 6 and combining the schematic diagrams of the astigmatism curves and the distortion curves shown in fig. 9, a good imaging effect can be achieved, and the optical lens 100 can be ensured to be thin.

Example 4

As shown in fig. 10, 11 and 12, the present embodiment provides an optical lens 100 including, in order from an object side to an image side, a prism 10, a first lens 21, a second lens 22, a third lens 31, a fourth lens 32, a fifth lens 33, a sixth lens 41 and a seventh lens 42. The first lens group 20 has negative refractive power, the second lens group 30 has positive refractive power, and the third lens group 40 has negative refractive power.

Wherein | (R6 + R10)/(R2 + R5) | =2.163; R2/R5=1.421. Satisfy the relation: the agent (R6 + R10)/(R2 + R5) | is more than or equal to 1.5 and less than or equal to 2.5 or R2/R5 is more than or equal to 1.5 and less than or equal to 3.

The aspheric surface profile can satisfy, but is not limited to, the following even-order aspheric surface formula:

TABLE 7

TABLE 8

Number of noodles	K	a1	a2	a3	a4	a5	a6
									1	0	0	0	0	0	0	0
2	0	0	0	0	0	0	0
								3	0	0	0	0	0	0	0
4	18.57715029	0	0.000852056	-9.83228E-05	-2.97771E-06	6.53808E-07	-3.6264E-08
								5	4.093808689	0	-0.000949788	-0.000252189	-1.97795E-05	1.19647E-06	-5.5789E-08
6	-1.359359636	0	-0.0006196	-9.38453E-05	4.08959E-06	-5.09827E-07	3.27315E-07
								7	-12.27432189	0	-0.000510751	-3.27356E-05	-7.84963E-06	2.09379E-06	4.19932E-08
8	-0.102668997	0	-0.000104861	2.65983E-05	5.73903E-06	4.11775E-07	-7.0765E-08
								9	-9.81768829	0	-0.000377514	8.7771E-06	7.82842E-07	2.02611E-07	-3.8737E-08
10	-89.89169292	0	-0.001000639	-0.000221817	-1.21705E-05	6.40243E-07	2.53593E-07
								11	0	0	-0.001333352	5.3007E-05	7.63938E-06	-4.02948E-07	-4.0128E-08
12	-0.888150595	0	0.001100327	0.00019706	1.19319E-05	1.09365E-07	-6.2076E-07
								13	-19.82573251	0	0.001212632	5.27949E-05	1.94205E-05	3.27552E-07	-4.4556E-07
14	-2.083792241	0	0.001867271	7.62915E-05	-1.15431E-05	3.36293E-05	-4.8333E-06
								15	4.366462787	0	0.005493159	-0.000150028	0.000181259	9.06795E-06	-6.4015E-08
16	3.459973893	0	-0.017825218	-0.000307057	0.000284819	1.39182E-05	-9.1361E-06
								17	-11697.26419	0	-0.02268235	0.001488887	-4.91694E-05	-7.88549E-06	1.08736E-07

In the present embodiment, the aperture value of the optical lens 100 is 3.18 to 5mm, and the effective focal length value is 10.1 to 22.7mm. Wherein, the distance D1 between the first lens 21 and the second lens 22 on the optical axis is D1=6.972mm in the short focus state; in the mid-focus state, D1=4.087mm; in the tele state, D1=0.998mm. A distance D2 on the optical axis between the second lens 22 and the third lens 31, D2=7.025mm in the short focus state; in the mid-focus state, D2=7.580mm; in the tele state, D2=10.029mm. Changing the F number from 3 to 5 in the process of changing the optical lens from the short-focus state to the long-focus state, and simultaneously meeting the condition that beta is more than or equal to 2, wherein beta = F _{Long and long} /f _{Short length} . The diameter of the first lens aperture can be kept constant during the change from short to long focus due to the change in F-number. By designing according to the basic parameters of table 7 and table 8 and combining the astigmatism curves, distortion curves, and chromatic aberration curves shown in fig. 11 and fig. 12, a good imaging effect can be achieved, and the optical lens 100 can be made thin.

Example 5

As shown in fig. 13, 14, and 15, the present embodiment provides an optical lens 100 including, in order from an object side to an image side, a prism 10, a first lens 21, a second lens 22, a third lens 31, a fourth lens 32, a fifth lens 33, a sixth lens 41, and a seventh lens 42. The first lens group 20 has negative refractive power, the second lens group 30 has positive refractive power, and the third lens group 40 has negative refractive power.

Wherein | (R6 + R10)/(R2 + R5) | =2.167; R2/R5=1.425. Satisfies the relation: the agent (R6 + R10)/(R2 + R5) is more than or equal to 1.5 and less than or equal to 2.5 or R2/R5 is more than or equal to 1.5 and less than or equal to 3.

Specific parameters of the optical lens 100 in this embodiment are shown in table 1 and table 2, where the unit of the curvature radius R, the thickness, and the radius (effective aperture) of the lens Y is millimeters (mm).

TABLE 9

TABLE 10

Number of noodles	K	a1	a2	a3	a4	a5	a6
									1	0	0	0	0	0	0	0
2	0	0	0	0	0	0	0
								3	0	0	0	0	0	0	0
4	18.53200759	0	0.000851156	-9.72635E-05	-2.95423E-06	6.28915E-07	-3.4173E-08
								5	4.085040661	0	-0.000945991	-0.000253618	-2.00092E-05	1.19491E-06	-5.6029E-08
6	-1.372637311	0	-0.000622953	-9.37968E-05	4.09341E-06	-5.30878E-07	3.2504E-07
								7	-12.37861597	0	-0.000513442	-3.22531E-05	-7.73259E-06	2.11245E-06	3.71164E-08
8	-0.10148481	0	-0.000102695	2.6622E-05	5.76956E-06	4.13504E-07	-7.0848E-08
								9	-9.822507281	0	-0.000374424	9.15322E-06	8.10875E-07	2.0728E-07	-3.8056E-08
10	-90.18698545	0	-0.001002388	-0.000222006	-1.21337E-05	6.49079E-07	2.55916E-07
								11	0	0	-0.001333034	5.28973E-05	7.57266E-06	-4.15432E-07	-4.3593E-08
12	-0.879795895	0	0.001097785	0.00019664	1.18806E-05	9.9268E-08	-6.2164E-07
								13	-20.17212767	0	0.001218117	5.35824E-05	1.95665E-05	3.5354E-07	-4.451E-07
14	-2.544096718	0	0.00193863	5.50188E-05	-1.76987E-05	3.33372E-05	-4.6425E-06
								15	4.359139249	0	0.00542446	-0.000167355	0.000182546	9.25245E-06	-1.8716E-07
16	3.503770218	0	-0.018144841	-0.00031496	0.000282665	1.3674E-05	-8.9415E-06
								17	0	0	-0.022045782	0.001493525	-4.95994E-05	-7.60768E-06	2.16186E-07

In the present embodiment, the aperture value of the optical lens 100 is 3.18 to 5mm, and the effective focal length value is 10.1 to 22.6mm. Wherein, the distance D1 between the first lens 21 and the second lens 22 on the optical axis is D1=6.966mm in the short focus state; in the mid-focus state, D1=4.092mm; at length Jiao ZhuangIn state, D1=0.997mm. A distance D2 on the optical axis between the second lens 22 and the third lens 31, D2=6.98mm in the short focus state; in the mid-focus state, D2=7.537mm; in the tele state, D2=9.981mm. Changing the F number from 3 to 5 in the process of changing the optical lens from the short-focus state to the long-focus state, and simultaneously meeting the condition that beta is more than or equal to 2, wherein beta = F _{Is long and long} /f _{Short length} . The diameter of the first lens aperture can be kept constant during the change from short to long focus due to the change in F-number. By designing according to the basic parameters of the above tables 9 and 10 and combining the astigmatism curves, distortion curves, and chromatic aberration curves shown in fig. 14 and 15, a good imaging effect can be achieved, and the optical lens 100 can be made thin.

In any of the above embodiments, the first lens 21, the third lens 31, and the fifth lens 33 may be made of glass, and the second lens 22, the fourth lens 32, the sixth lens 41, and the seventh lens 42 may be made of plastic. Of course, the second lens 22, the fourth lens 32 and the fifth lens 33 may be made of glass, and the first lens 21, the third lens 31, the sixth lens 41 and the seventh lens 42 may be made of plastic.

Embodiments of the present application also provide a terminal device including the optical lens 100 as described in any of the above embodiments.

The terminal device provided in this embodiment may be a mobile phone, and the mobile phone includes the optical lens 100 described in any embodiment, so as to have all the beneficial effects of the optical lens 100 described in any embodiment, which are not repeated herein.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. An optical lens is characterized by comprising a light guide element, a first lens group, a second lens group and a third lens group in sequence from an object side to an image side;

the first lens group includes a first lens and a second lens;

the second lens group includes a third lens, a fourth lens, and a fifth lens;

the third lens group includes a sixth lens and a seventh lens;

the optical lens satisfies the relation: the agent (R6 + R10)/(R2 + R5) is not less than 1.5 and not more than 2.5 or not less than 1.5 and not more than R2/R5 and not more than 3, wherein R2 is the curvature radius of the image side surface of the first lens, R5 is the curvature radius of the object side surface of the third lens, R6 is the curvature radius of the image side surface of the third lens, and R10 is the curvature radius of the image side surface of the fifth lens.

2. An optical lens according to claim 1, characterized in that the optical lens satisfies: beta is not less than 2, wherein, beta = f _{Long and long} /f _{Short length} Beta is the optical zoom ratio, f _{Long and long} Is the focal length of the optical lens in long focus, f _{Short length} When the optical lens is in short focusThe focal length of (c).

3. An optical lens according to claim 1, characterized in that the optical lens satisfies: TTL/f _{Long and long} Not more than 1.1, wherein TTL is the total optical length of the optical lens, f _{Long and long} Is the focal length of the optical lens in the long focus.

4. An optical lens according to claim 1, wherein the first lens group has negative refractive power;

the second lens group has positive refractive power;

the third lens group has negative refractive power.

5. An optical lens according to claim 1, wherein the first lens and the second lens are relatively fixed;

the third lens, the fourth lens and the fifth lens are relatively fixed;

the sixth lens and the seventh lens are relatively fixed.

6. An optical lens barrel according to claim 1, wherein the first lens element has a concave image-side surface and a concave object-side surface, the second lens element has a concave image-side surface, and the second lens element has a convex object-side surface;

the image side surface of the third lens is a convex surface, the object side surfaces of the fourth lens and the fifth lens are concave surfaces, and the image side surfaces of the third lens, the fourth lens and the fifth lens are convex surfaces;

the object side surfaces of the sixth lens element and the seventh lens element are concave surfaces, and the image side surfaces of the sixth lens element and the seventh lens element are convex surfaces.

7. An optical lens according to claim 1, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all aspheric lenses.

8. An optical lens according to claim 1, wherein any two of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element are made of glass, and the remaining five lens elements are made of plastic; or any three of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are made of glass, and the rest four lenses are made of plastic.

9. An optical lens according to claim 1, wherein in a process of changing the optical lens from the short focus state to the long focus state, a distance between the first lens group and the second lens group gradually decreases, and a distance between the third lens group and an image plane gradually increases.

10. An optical lens barrel according to claim 9, wherein the first lens group and the second lens group move in a linear manner, and the third lens group and the image plane move in a non-linear manner; or the first lens group and the second lens group move in a nonlinear manner, and the third lens group and the imaging surface move in a linear manner.

11. An optical lens according to claim 1, characterized in that the optical lens satisfies: FNO is more than or equal to 3 and less than or equal to 5, and the FNO is the aperture value of the optical lens.

12. An optical lens barrel according to claim 1, wherein a maximum distance d between an image side surface of the sixth lens element and an object side surface of the seventh lens element satisfies the relationship: d is more than or equal to 0 and less than or equal to 3mm.

13. An optical lens according to claim 1, wherein the light guide element is a prism, and the light incident surface and the light emitting surface of the prism are both spherical surfaces.

14. A terminal device characterized by comprising the optical lens according to any one of claims 1 to 13.