CN112748555B

CN112748555B - Optical lens and electronic device

Info

Publication number: CN112748555B
Application number: CN201911053798.5A
Authority: CN
Inventors: 王一峰; 谢前森
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2022-04-19
Anticipated expiration: 2039-10-31
Also published as: CN112748555A

Abstract

The application discloses an optical lens and an electronic device including the same. The optical lens sequentially comprises a first lens, a second lens and a third lens from an object side to an image side along an optical axis, wherein the first lens has negative focal power, 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 has a negative optical power; the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the fourth lens has positive optical power; and the fifth lens has a positive optical power. The optical lens can achieve at least one of the advantages of large relative aperture, high relative illumination, large angle and image surface, small distortion, high resolution, miniaturization, small CRA and the like.

Description

Optical lens and electronic device

Technical Field

The present disclosure relates to the field of optical elements, and more particularly, to an optical lens and an electronic device.

Background

In recent years, with the rapid development of an automobile driving assistance system, an in-automobile monitoring lens is more and more widely applied. The monitoring lens in the vehicle can be divided into a driver monitoring lens and a passenger monitoring lens according to a monitoring target, and can be divided into a 2D lens and a 3D lens according to a module. In monitoring the inside of the vehicle, the monitoring target includes a passenger and a driver. When monitoring the passengers of the whole vehicle, the optical lens needs to have a larger view field angle and a larger imaging surface so as to realize comprehensive monitoring. When monitoring a driver, the optical lens needs to have a larger relative aperture to achieve higher relative illumination and higher imaging quality.

Disclosure of Invention

An aspect of the present application provides an optical lens, in order from an object side to an image side along an optical axis, comprising: the lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the first lens has negative focal power, 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 has negative focal power; the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power; and the fifth lens has positive optical power.

In one embodiment, the second lens element has a convex object-side surface and a concave image-side surface.

In one embodiment, the second lens element has a concave object-side surface and a concave image-side surface.

In one embodiment, the fourth lens element has a convex object-side surface and a convex image-side surface.

In one embodiment, the fourth lens element has a convex object-side surface and a concave image-side surface.

In one embodiment, the fifth lens element has a convex object-side surface and a convex image-side surface.

In one embodiment, the fifth lens element has a convex object-side surface and a concave image-side surface.

In one embodiment, at least two lenses of the first to fifth lenses are aspherical lenses.

In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field angle FOV of the optical lens, and the image height H corresponding to the maximum field angle FOV satisfy: TTL/H/FOV is less than or equal to 0.045.

In one embodiment, the maximum field angle FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field angle FOV satisfy: (FOV F)/H.gtoreq.45.

In one embodiment, a distance d23 between the image side surface of the second lens and the object side surface of the third lens on the optical axis and a distance TTL between the object side surface of the first lens and the imaging surface of the optical lens on the optical axis satisfy: d23/TTL is more than or equal to 0.08 and less than or equal to 0.35.

In one embodiment, the distance d34 between the image side surface of the third lens and the object side surface of the fourth lens on the optical axis and the total effective focal length F of the optical lens satisfy: d34/F is less than or equal to 0.55.

In one embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens satisfy: the absolute value of F1/F2 is more than or equal to 0.3 and less than or equal to 2.7.

In one embodiment, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens satisfy: the absolute value of F2/F3 is more than or equal to 0.3 and less than or equal to 2.5.

In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens satisfy: R1/R2 is more than or equal to 1.5 and less than or equal to 5.

In one embodiment, the radius of curvature R6 of the object-side surface of the third lens and the radius of curvature R7 of the image-side surface of the third lens satisfy: the absolute value of R6/R7 is more than or equal to 1 and less than or equal to 6.

In one embodiment, the radius of curvature R7 of the image-side surface of the third lens and the radius of curvature R8 of the object-side surface of the fourth lens satisfy: the ratio of (R7-R8)/(R7+ R8) is more than or equal to-10 and less than or equal to-1.

In one embodiment, a distance d23 between the image-side surface of the second lens and the object-side surface of the third lens on the optical axis and a distance d34 between the image-side surface of the third lens and the object-side surface of the fourth lens on the optical axis satisfy: d23/d34 is more than or equal to 8.

Another aspect of the present disclosure provides an optical lens, in order from an object side to an image side along an optical axis, comprising: the lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the first lens has negative focal power; the second lens has negative focal power; the third lens has positive focal power; the fourth lens has positive focal power; and the fifth lens has positive focal power; the distance d34 between the image side surface of the third lens and the object side surface of the fourth lens on the optical axis and the total effective focal length F of the optical lens satisfy: d34/F is less than or equal to 0.55.

In one embodiment, the first lens element has a convex object-side surface and a concave image-side surface.

In one embodiment, the object-side surface of the third lens element is convex and the image-side surface of the third lens element is convex.

Still another aspect of the present application provides an electronic device that may include the optical lens according to the above-described embodiment and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

The optical lens has the advantages that the five lenses are adopted, the shapes, focal powers and the like of the lenses are set in an optimized mode, and the optical lens has at least one beneficial effect of large relative aperture, high relative illumination, large image surface with large angle, small distortion, high image resolution, miniaturization, small CRA and the like.

Drawings

Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 is a schematic view showing a structure of an optical lens according to embodiment 1 of the present application;

fig. 2 is a schematic structural view showing an optical lens according to embodiment 2 of the present application;

fig. 3 is a schematic structural view showing an optical lens according to embodiment 3 of the present application;

fig. 4 is a schematic structural view showing an optical lens according to embodiment 4 of the present application;

fig. 5 is a schematic structural view showing an optical lens according to embodiment 5 of the present application;

fig. 6 is a schematic structural view showing an optical lens according to embodiment 6 of the present application;

fig. 7 is a schematic structural view showing an optical lens according to embodiment 7 of the present application;

fig. 8 is a schematic structural view showing an optical lens according to embodiment 8 of the present application;

fig. 9 is a schematic structural view showing an optical lens according to embodiment 9 of the present application;

fig. 10 is a schematic structural view showing an optical lens according to embodiment 10 of the present application;

fig. 11 is a schematic structural view showing an optical lens according to embodiment 11 of the present application; and

fig. 12 is a schematic view showing a structure of an optical lens according to embodiment 12 of the present application.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the image side is called the image side surface of the lens.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

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

The features, principles and other aspects of the present application are described in detail below.

In an exemplary embodiment, the optical lens includes, for example, five lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses are arranged along the optical axis in sequence from the object side to the image side.

In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the image plane. Alternatively, the photosensitive element provided to the imaging surface may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS).

The first lens may have a negative power and have a meniscus shape, its object side may be convex, and its image side may be concave. The first lens has negative focal power, which is beneficial to reducing the aperture of the front end and improving the imaging quality, and can avoid overlarge divergence of object light, thereby effectively controlling the aperture of the rear lens. The object side surface of the first lens is a convex surface, so that incident light with a large field angle can be collected, and the light entering the optical system as much as possible is ensured, thereby increasing luminous flux and improving illumination intensity. The arrangement of the cooperation of the focal power and the surface type of the first lens is favorable for reducing the incident angle of incident light on the attack surface of the optical system, and collects more light rays with large view field angles to enter the rear optical system, thereby increasing the luminous flux and realizing the whole large view field range. In practical application, the vehicle-mounted lens is generally exposed in an external environment, and the meniscus lens protruding towards the object side is beneficial to rain and snow to slide along the lens, so that the service life of the lens is prolonged, and the influence of rain and snow on lens imaging is reduced.

The second lens element can have a negative power, and can have a convex object-side surface and a concave image-side surface, or both the object-side surface and the image-side surface can be concave. The focal power and the surface shape of the second lens are matched, so that light rays can smoothly enter a rear optical system, the resolution of the system is improved, the relative illumination of the system is improved, the distortion is optimized, and the like.

The third lens element can have a positive optical power, and the object-side surface and the image-side surface of the third lens element can be convex at the same time. The third lens is a converging lens, so that light rays can be converged, the relative illumination of the system is favorably improved, the resolution quality of the system is improved, and the miniaturization of the system is favorably realized.

The fourth lens element can have a positive power, and can have a convex object-side surface and a convex image-side surface, or can have a convex object-side surface and a concave image-side surface. The focal power and the surface type of the fourth lens are favorable for converging light rays and adjusting the trend of the light rays, so that the trend of the light rays is stable and transits to a rear optical system.

The fifth lens element can have a positive optical power, can have a convex object-side surface and a concave image-side surface, or can have both a convex object-side surface and a convex image-side surface. The focal power of the fifth lens is positive, so that light can be converged stably at the tail end of the optical system, the CRA of the optical system is reduced, the resolution quality of the system is improved, and the lens is better suitable for a low-light environment.

In an exemplary embodiment, a stop for limiting the light beam may be disposed between the second lens and the third lens to further improve the imaging quality of the optical lens. The diaphragm is beneficial to effectively collecting light rays entering the optical system, shortening the total length of the system and reducing the aperture of the lens. In the embodiment of the present application, the stop may be disposed in the vicinity of the object side surface of the third lens or at an intermediate position between the second lens and the third lens. It should be noted, however, that the positions of the diaphragms disclosed herein are merely examples and not limitations; in alternative embodiments, the diaphragm may be disposed at other positions according to actual needs.

In an exemplary embodiment, the optical lens according to the present application may further include a filter disposed between the fifth lens and the image plane to filter light rays having different wavelengths, as needed. The optical lens according to the present application may further include a protective glass disposed between the fifth lens and the imaging surface to prevent internal elements (e.g., a chip) of the optical lens from being damaged.

In an exemplary embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field angle FOV of the optical lens, and the image height H corresponding to the maximum field angle FOV satisfy: TTL/H/FOV ≦ 0.045, e.g., TTL/H/FOV ≦ 0.04. The mutual relation among the three is reasonably set, and the miniaturization of the lens is favorably realized.

In an exemplary embodiment, the maximum field angle FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field angle FOV satisfy: (FOV F)/H.gtoreq.45, for example, (FOV F)/H.gtoreq.48. The mutual relation of the three is reasonably set, the optical lens has the characteristic of small distortion, and has the characteristics of large field angle and long focus, and the balanced design of the large field angle and the long focus is realized.

In an exemplary embodiment, a distance d23 between the image side surface of the second lens and the object side surface of the third lens on the optical axis and a distance TTL between the object side surface of the first lens and the imaging surface of the optical lens on the optical axis satisfy: 0.08. ltoreq. d 23/TTL. ltoreq.0.35, for example 0.1. ltoreq. d 23/TTL. ltoreq.0.32. The distance between the second lens and the third lens on the optical axis and the distance between the second lens and the third lens and the distance between the object side surface of the first lens and the imaging surface of the optical lens on the optical axis are reasonably set, so that the beam expanding and large-angle light can enter a rear optical system, the illumination of the system is improved, and the miniaturization of the lens is realized.

In an exemplary embodiment, the separation distance d34 on the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens satisfies the following relationship with the total effective focal length F of the optical lens: d 34/F.ltoreq.0.55, e.g., d 34/F.ltoreq.0.45. The third lens and the fourth lens are arranged to have smaller spacing distance, and the proportional relation between the spacing distance of the third lens and the fourth lens on the optical axis and the total effective focal length of the optical lens is reasonably set, so that the lens group is beneficial to being compact in structure, and the miniaturization of the lens is realized.

In an exemplary embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens satisfy: 0.3. ltoreq. F1/F2. ltoreq.2.7, for example 0.5. ltoreq. F1/F2. ltoreq.2.5. The proportional relation of the effective focal length of the first lens and the effective focal length of the second lens is reasonably set, so that smooth transition of light among the lenses is facilitated, and the imaging quality of an optical system is improved.

In an exemplary embodiment, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens satisfy: 0.3. ltoreq. F2/F3. ltoreq.2.5, for example 0.5. ltoreq. F2/F3. ltoreq.2. The proportional relation of the effective focal length of the second lens and the effective focal length of the third lens is reasonably set, so that smooth transition of light among the lenses is facilitated, and the imaging quality of an optical system is improved.

In an exemplary embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens satisfy: 1.5. ltoreq.R 1/R2. ltoreq.5, for example 1.8. ltoreq.R 1/R2. ltoreq.4.7. The proportional relation of the curvature radius of the object side surface of the first lens and the curvature radius of the image side surface of the first lens is reasonably set, the shape of the lens of the first lens is effectively controlled, the first lens is favorable for collecting light rays with larger angles to enter a rear optical system, the front port diameter and the lens volume of the lens are reduced, and the miniaturization of the lens is realized while the resolution of the lens is improved.

In an exemplary embodiment, the radius of curvature R6 of the object-side surface of the third lens and the radius of curvature R7 of the image-side surface of the third lens satisfy: 1.ltoreq. R6/R7.ltoreq.6, for example 1.2.ltoreq. R6/R7.ltoreq.5.5. The curvature radius of the object side surface of the third lens and the curvature radius of the image side surface of the third lens are reasonably set, the shape of the lens of the third lens is effectively controlled, light convergence is facilitated, the illumination and the resolution quality of the system are improved, and miniaturization of the lens is facilitated.

In an exemplary embodiment, a radius of curvature R7 of the image-side surface of the third lens and a radius of curvature R8 of the object-side surface of the fourth lens satisfy: -10. ltoreq. R7-R8)/(R7+ R8. ltoreq.1, for example, -9. ltoreq. R7-R8)/(R7+ R8. ltoreq. 1.2. The curvature radius of the image side surface of the third lens and the curvature radius of the object side surface of the fourth lens meet the relationship, so that aberration of the optical system is corrected, when light emitted from the third lens enters the object side surface of the fourth lens, the light is gentle, and tolerance sensitivity of the optical system is reduced.

In an exemplary embodiment, a separation distance d23 on the optical axis from the image-side surface of the second lens to the object-side surface of the third lens and a separation distance d34 on the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens satisfy: d23/d 34. gtoreq.8, e.g., d23/d 34. gtoreq.10. The proportional relation between the spacing distance on the optical axis from the image side surface of the second lens to the object side surface of the third lens and the spacing distance on the optical axis from the image side surface of the third lens to the object side surface of the fourth lens is reasonably arranged, so that the optical system can collect large-angle light rays, the light rays can smoothly enter the rear optical system, the relative illumination of the system is improved, and the night vision requirement is met.

In an exemplary embodiment, the first lens may be made of a high refractive index material. For example, the refractive index Nd1 of the material of the first lens satisfies: nd1 is more than or equal to 1.65. The material selection of the first lens is beneficial to reducing the front end aperture of the optical system and improving the imaging quality.

In an exemplary embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: 2.ltoreq. F1/F.ltoreq.9, for example 2.3.ltoreq. F1/F.ltoreq.8.5. The proportional relation between the effective focal length of the first lens and the total effective focal length of the optical lens is reasonably set, so that the optical lens has a simpler lens structure and higher resolving power.

In an exemplary embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: 1.5. ltoreq. F2/F. ltoreq.6.5, for example 2. ltoreq. F2/F. ltoreq.6. The proportional relation between the effective focal length of the second lens and the total effective focal length of the optical lens is reasonably set, so that light rays are favorably dispersed, the trend of the light rays is controlled, and the light rays smoothly enter a rear optical system.

In an exemplary embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy: 1.5. ltoreq. F3/F. ltoreq.6.5, for example 2. ltoreq. F3/F. ltoreq.6. The proportional relation of the effective focal length of the third lens and the total effective focal length of the optical lens is reasonably set, so that light rays can be gathered, the trend of the light rays can be controlled, and the light rays can be smoothly transited to a rear optical system.

In an exemplary embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy: 2.ltoreq.F 4/F.ltoreq.40, for example 2.5.ltoreq.F 4/F.ltoreq.38. The proportional relation between the effective focal length of the fourth lens and the total effective focal length of the optical lens is reasonably set, so that the light trend can be controlled, and the light can be smoothly transited to a rear optical system.

In an exemplary embodiment, the effective focal length F5 of the fifth lens and the total effective focal length F of the optical lens satisfy: 2.ltoreq.F 5/F.ltoreq.45, for example 2.5.ltoreq.F 5/F.ltoreq.38. The proportional relation between the effective focal length of the fifth lens and the total effective focal length of the optical lens is reasonably set, so that light can smoothly reach an imaging surface, the CRA of the system is reduced, and the resolution quality of the optical system is improved.

In an exemplary embodiment, at least two lenses of the first to fifth lenses are aspherical lenses. Preferably, at least two lenses of the second lens, the third lens and the fifth lens are aspheric lenses. The aspheric lens is characterized in that: the curvature varies continuously from the center to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated in imaging can be eliminated as much as possible, so that the imaging quality of the lens is improved. The aspheric lens helps to correct system aberration and improve resolving power. Preferably, the second lens and the fifth lens are both aspheric lenses, which is beneficial to improving the resolution quality of the optical system. The optical imaging lens provided by the application does not limit the number of the aspheric lenses. In a specific application, the number of the aspheric lenses in the optical imaging lens can be increased or decreased according to the need of image resolution. If the resolution quality of the lens is focused, all the lenses can adopt aspheric lenses.

According to the optical lens of the above embodiment of the present application, through reasonable setting of the shape and focal power of each lens, in the case of only using 5 lenses, the characteristics of large image plane at a large angle, large relative aperture, high relative illumination and small distortion are realized, and meanwhile, the requirements of small volume, low cost and the like are considered. The optical lens also has the characteristic of smaller CRA (crazing code), is beneficial to avoiding stray light generated when light is emitted at the rear end of the system and hits the lens cone, and can be well matched with a vehicle-mounted chip to avoid the phenomena of color cast and dark angle.

According to the optical lens of the embodiment of the application, all lenses can be made of glass materials, so that the optical lens is suitable for different temperature environments, and the stability of optical performance is improved. The optical lens can also be made of glass for part of the lenses and plastic for part of the lenses or plastic for all the lenses, so that the cost of the lens is reduced.

However, it will be appreciated by those skilled in the art that the number of lenses constituting the lens barrel may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although five lenses are exemplified in the embodiment, the optical lens is not limited to include five lenses. The optical lens may also include other numbers of lenses, if desired.

Specific examples of an optical lens applicable to the above-described embodiments are further described below with reference to the drawings.

Example 1

An optical lens according to embodiment 1 of the present application is described below with reference to fig. 1. Fig. 1 shows a schematic structural diagram of an optical lens according to embodiment 1 of the present application.

As shown in fig. 1, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4 and a fifth lens element L5.

The first lens L1 is a meniscus lens with negative power, with the object side S1 being convex and the image side S2 being concave. The second lens L2 is a biconcave lens with negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens L3 is a biconvex lens with positive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens element L4 is a biconvex lens with positive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens L5 is a meniscus lens with positive power, with the object side S10 being convex and the image side S11 being concave.

The optical lens may further include a stop STO, which may be disposed between the second lens L2 and the third lens L3 to improve image quality. For example, the stop STO may be disposed near the object side S6 of the third lens L3.

In the present embodiment, the object-side and image-side surfaces of the second lens L2, the third lens L3, and the fifth lens L5 may each be aspheric.

Optionally, the optical lens may further include a filter L6 and/or a protective glass L6 'having an object side S12 and an image side S13, the filter L6 may be used to correct color deviation and the protective glass L6' may be used to protect the image sensing chip IMA located at the imaging plane S14. The light from the object sequentially passes through the respective surfaces S1 to S13 and is finally imaged on the imaging surface S14.

Table 1 shows a radius of curvature R, a thickness T (it is understood that the thickness T of the row in which S1 is located is the center thickness of the first lens L1, the thickness T of the row in which S2 is located is the air interval d12 between the first lens L1 and the second lens L2, and so on), a refractive index Nd, and an abbe number Vd of each lens of the optical lens of example 1.

TABLE 1

The present embodiment adopts five lenses as an example, and by reasonably allocating the focal power and the surface type of each lens, the center thickness of each lens, and the air space between each lens, the lens can have at least one of the advantages of high resolution, miniaturization, small front end aperture, small CRA, good temperature performance, and the like. Each aspherical surface type Z is defined by the following formula:

wherein Z is the distance rise from the vertex of the aspheric surface when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient conc; A. b, C, D, E, F are all high order term coefficients. Table 2 below shows the conic coefficients K and high-order term coefficients A, B, C, D, E and F of the aspherical lens surfaces S3, S4, S6, S7, S10 and S11 that can be used in example 1.

Flour mark

K

A

B

C

D

E

F

S3

-11.2118

2.6321E-03

-1.1022E-04

3.5362E-06

-7.4727E-08

7.9046E-10

-3.9852E-12

S4

18.0561

9.1835E-03

-1.9888E-04

3.1590E-05

-1.1935E-06

1.6430E-07

4.5972E-09

S6

22.5364

-7.8147E-04

4.6553E-05

-7.5581E-06

1.3478E-07

1.1811E-08

-9.3026E-10

S7

-1.4257

-8.4367E-04

2.6949E-05

7.0464E-07

-3.6151E-07

5.6064E-09

7.8694E-10

S10

-41.3480

1.3151E-03

-6.9739E-05

6.5755E-07

-9.5329E-08

-8.9614E-10

2.0708E-10

S11

53.7202

4.0729E-03

-8.6521E-05

1.7533E-05

-2.4127E-06

1.0399E-07

-3.0626E-09

TABLE 2

Example 2

An optical lens according to embodiment 2 of the present application is described below with reference to fig. 2. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 2 shows a schematic structural diagram of an optical lens according to embodiment 2 of the present application.

As shown in fig. 2, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4 and a fifth lens element L5.

Table 3 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 2.

TABLE 3

Table 4 below gives the conic coefficients K and high-order term coefficients A, B, C, D, E and F that can be used for the aspherical lens surfaces S3, S4, S6, S7, S10 and S11 in example 2.

Flour mark

K

A

B

C

D

E

F

S3

-7.5600

2.5048E-03

-1.1221E-04

3.5429E-06

-7.3558E-08

8.2113E-10

-3.7378E-12

S4

-98.3187

9.2535E-03

-2.4128E-04

2.3134E-05

-1.1361E-06

1.3458E-07

-2.1984E-09

S6

21.5828

-9.4041E-04

7.0104E-05

-1.0425E-05

2.1046E-07

3.5317E-08

-7.5600E-09

S7

-2.0135

2.5276E-04

3.9381E-05

7.0888E-07

-3.2666E-07

9.2558E-09

3.0755E-10

S10

45.2668

1.7653E-03

-5.5538E-05

8.1929E-07

-7.6406E-08

-6.3557E-11

6.0937E-11

S11

20.4468

4.1149E-03

-5.2489E-05

2.0163E-05

-2.4392E-06

9.9586E-08

-2.5770E-09

TABLE 4

Example 3

An optical lens according to embodiment 3 of the present application is described below with reference to fig. 3. Fig. 3 shows a schematic structural diagram of an optical lens according to embodiment 3 of the present application.

As shown in fig. 3, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4 and a fifth lens element L5.

The first lens L1 is a meniscus lens with negative power, with the object side S1 being convex and the image side S2 being concave. The second lens L2 is a meniscus lens with negative power, with the object side S3 being convex and the image side S4 being concave. The third lens L3 is a biconvex lens with positive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens element L4 is a biconvex lens with positive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens element L5 is a biconvex lens with positive power, and has a convex object-side surface S10 and a convex image-side surface S11.

The optical lens may further include a stop STO, which may be disposed between the second lens L2 and the third lens L3 to improve image quality.

Table 5 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 3.

TABLE 5

Table 6 below gives the conic coefficients K and high-order term coefficients A, B, C, D, E and F that can be used for the aspherical lens surfaces S3, S4, S6, S7, S10 and S11 in example 3.

TABLE 6

Example 4

An optical lens according to embodiment 4 of the present application is described below with reference to fig. 4. Fig. 4 shows a schematic structural diagram of an optical lens according to embodiment 4 of the present application.

As shown in fig. 4, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4 and a fifth lens element L5.

Table 7 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 4.

TABLE 7

Table 8 below gives the conic coefficients K and high-order term coefficients A, B, C, D, E and F that can be used for the aspherical lens surfaces S3, S4, S6, S7, S10 and S11 in example 4.

Flour mark

K

A

B

C

D

E

F

S3

201.7782

5.8008E-03

-2.8875E-04

1.3952E-05

-2.6181E-07

-3.9557E-09

-2.2473E-09

S4

0.8189

1.0348E-02

9.5436E-04

-3.6733E-04

6.2379E-05

1.5738E-08

-3.6976E-08

S6

23.0719

-2.0883E-04

1.6378E-05

-1.4007E-06

5.7035E-07

-3.7029E-08

6.5357E-10

S7

-0.8512

-6.4856E-04

4.5062E-06

1.1300E-06

-4.4879E-07

2.7901E-08

-1.8640E-10

S10

-80.1000

1.4732E-03

-1.4474E-04

6.5020E-06

-5.5730E-07

2.7718E-08

-4.7003E-10

S11

100.2378

2.5384E-03

2.6452E-04

-3.1355E-05

1.4735E-06

-4.4050E-08

5.1777E-09

TABLE 8

Example 5

An optical lens according to embodiment 5 of the present application is described below with reference to fig. 5. Fig. 5 shows a schematic structural diagram of an optical lens according to embodiment 5 of the present application.

As shown in fig. 5, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4 and a fifth lens element L5.

The first lens L1 is a meniscus lens with negative power, with the object side S1 being convex and the image side S2 being concave. The second lens L2 is a meniscus lens with negative power, with the object side S3 being convex and the image side S4 being concave. The third lens L3 is a biconvex lens with positive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens L4 is a meniscus lens with positive power, with the object side S8 being convex and the image side S9 being concave. The fifth lens L5 is a meniscus lens with positive power, with the object side S10 being convex and the image side S11 being concave.

Table 9 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 5.

TABLE 9

The following table 10 gives the conic coefficients K and high-order term coefficients A, B, C, D, E and F that can be used for the aspherical lens surfaces S3, S4, S6, S7, S10 and S11 in example 5.

Watch 10

Example 6

An optical lens according to embodiment 6 of the present application is described below with reference to fig. 6. Fig. 6 shows a schematic structural diagram of an optical lens according to embodiment 6 of the present application.

As shown in fig. 6, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4 and a fifth lens element L5.

Table 11 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 6.

TABLE 11

Table 12 below gives the conic coefficients K and high-order term coefficients A, B, C, D, E and F that can be used for the aspherical lens surfaces S3, S4, S6, S7, S10 and S11 in example 6.

Flour mark

K

A

B

C

D

E

F

S3

91.9802

2.5031E-03

-2.0611E-04

9.7684E-06

-2.7712E-07

4.2917E-09

-3.1816E-11

S4

1.1725

3.2279E-03

1.2044E-03

-3.3904E-04

4.6439E-05

-3.0146E-06

7.8273E-08

S6

6.3943

-1.6244E-03

3.0596E-05

-9.3887E-06

4.1044E-07

-5.6239E-09

-9.2623E-10

S7

-1.7036

-4.2798E-04

-1.7715E-05

2.4648E-06

-4.9908E-07

2.8866E-08

-6.9792E-10

S10

-5.8266

2.9808E-03

-8.8653E-05

9.1740E-06

-6.0219E-07

2.0901E-08

-2.2640E-10

S11

-7.7823

3.8646E-03

-8.5853E-05

2.3743E-05

3.7609E-07

-2.0031E-07

1.2282E-08

TABLE 12

Example 7

An optical lens according to embodiment 7 of the present application is described below with reference to fig. 7. Fig. 7 shows a schematic structural diagram of an optical lens according to embodiment 7 of the present application.

As shown in fig. 7, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4 and a fifth lens element L5.

The first lens L1 is a meniscus lens with negative power, with the object side S1 being convex and the image side S2 being concave. The second lens L2 is a meniscus lens with negative power, with the object side S3 being convex and the image side S4 being concave. The third lens L3 is a biconvex lens with positive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens L4 is a meniscus lens with positive power, with the object side S8 being convex and the image side S9 being concave. The fifth lens element L5 is a biconvex lens with positive power, and has a convex object-side surface S10 and a convex image-side surface S11.

Table 13 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 7.

Watch 13

The following table 14 gives the conic coefficients K and high-order term coefficients A, B, C, D, E and F that can be used for the aspherical lens surfaces S3, S4, S6, S7, S10 and S11 in example 7.

Flour mark

K

A

B

C

D

E

F

S3

-23.5086

2.1276E-03

-2.2451E-04

8.0416E-06

-1.4755E-07

4.7279E-10

-3.4033E-11

S4

-0.8653

3.3989E-03

1.8218E-03

-3.4421E-04

4.8354E-05

-3.2222E-06

7.7130E-08

S6

6.6618

-1.4950E-03

4.1424E-05

-1.0235E-05

4.8632E-07

-2.7927E-09

-2.0520E-09

S7

-1.5981

-4.2997E-04

-2.3749E-05

4.9161E-06

-4.7030E-07

2.5666E-08

-9.2375E-10

S10

-24.1378

2.1222E-03

-1.7686E-04

7.0727E-06

-5.0899E-07

1.6007E-08

-4.8492E-10

S11

73.5622

2.5091E-03

-1.3004E-04

1.9456E-05

5.5197E-07

-3.2582E-07

1.5251E-08

TABLE 14

Example 8

An optical lens according to embodiment 8 of the present application is described below with reference to fig. 8. Fig. 8 shows a schematic structural diagram of an optical lens according to embodiment 8 of the present application.

As shown in fig. 8, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4 and a fifth lens element L5.

Table 15 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 8.

Watch 15

The following table 16 gives the conic coefficients K and high-order term coefficients A, B, C, D, E and F that can be used for the aspherical lens surfaces S3, S4, S6, S7, S10 and S11 in example 8.

Flour mark

K

A

B

C

D

E

F

S3

-68.1871

2.2644E-03

-2.1785E-04

1.0252E-05

-2.7312E-07

3.7933E-09

-4.1900E-11

S4

-1.1183

2.8507E-03

1.5485E-03

-3.5850E-04

4.6620E-05

-3.5123E-06

7.6408E-08

S6

6.5714

-1.6770E-03

4.7928E-05

-1.0473E-05

4.1558E-07

-5.3150E-09

-1.3468E-09

S7

-1.7354

-3.9547E-04

-2.4415E-05

3.7102E-06

-4.6203E-07

2.6886E-08

-9.9834E-10

S10

-22.6186

2.6391E-03

-1.1619E-04

8.5146E-06

-5.6720E-07

1.8083E-08

-2.0045E-10

S11

45.8345

3.6339E-03

-1.3232E-04

2.5288E-05

4.1467E-07

-2.5639E-07

1.3613E-08

TABLE 16

Example 9

An optical lens according to embodiment 9 of the present application is described below with reference to fig. 9. Fig. 9 shows a schematic structural diagram of an optical lens according to embodiment 9 of the present application.

As shown in fig. 9, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4 and a fifth lens element L5.

The first lens L1 is a meniscus lens with negative power, with the object side S1 being convex and the image side S2 being concave. The second lens L2 is a biconcave lens with negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens L3 is a biconvex lens with positive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens element L4 is a biconvex lens with positive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens element L5 is a biconvex lens with positive power, and has a convex object-side surface S10 and a convex image-side surface S11.

Table 17 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 9.

TABLE 17

The following table 18 gives the conic coefficients K and high-order term coefficients A, B, C, D, E and F that can be used for the aspherical lens surfaces S3, S4, S6, S7, S10 and S11 in example 9.

Flour mark

K

A

B

C

D

E

F

S3

-12.7058

4.1791E-03

-2.5266E-04

1.0411E-05

-2.6706E-07

3.6277E-09

-1.9646E-11

S4

23.3365

1.4630E-02

-1.4602E-04

-1.7317E-04

5.0803E-05

-6.3934E-06

3.6577E-07

S6

17.6645

-2.7349E-04

-1.2133E-05

-2.1757E-06

6.3604E-07

-3.1407E-08

5.0484E-10

S7

-1.5305

-3.6427E-04

1.1807E-05

2.5639E-06

-4.6535E-07

2.7716E-08

-3.0726E-10

S10

-44.5583

1.3347E-03

-1.2902E-04

6.5353E-06

-5.9083E-07

2.5684E-08

-5.4821E-10

S11

-7.4591

-2.1868E-04

3.0002E-04

-3.5790E-05

1.4575E-06

-3.1407E-08

4.8773E-10

Watch 18

Example 10

An optical lens according to embodiment 10 of the present application is described below with reference to fig. 10. Fig. 10 shows a schematic structural diagram of an optical lens according to embodiment 10 of the present application.

As shown in fig. 10, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4 and a fifth lens element L5.

Table 19 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 10.

Watch 19

The following table 20 gives the conic coefficients K and high-order term coefficients A, B, C, D, E and F that can be used for the aspherical lens surfaces S3, S4, S6, S7, S10 and S11 in example 10.

Flour mark

K

A

B

C

D

E

F

S3

-9.0401

3.4510E-03

-2.1100E-04

9.5582E-06

-2.8070E-07

4.5695E-09

-4.1539E-11

S4

-42.5282

2.3542E-02

5.5521E-05

-2.1551E-04

7.1134E-05

-2.7381E-06

2.8292E-07

S6

10.9426

-1.5645E-04

3.8593E-05

-5.0970E-06

6.1320E-07

-2.3792E-08

1.2734E-10

S7

-1.6792

-1.6671E-04

1.0515E-05

4.6876E-06

-4.9774E-07

2.8260E-08

-3.0367E-10

S10

-60.7882

2.0272E-03

-1.2251E-04

6.5572E-06

-5.7580E-07

2.7441E-08

-6.7297E-10

S11

-23.7453

-2.3486E-05

3.4618E-04

-4.8821E-05

1.3506E-06

-2.7531E-08

4.5228E-10

Watch 20

Example 11

An optical lens according to embodiment 11 of the present application is described below with reference to fig. 11. Fig. 11 shows a schematic structural diagram of an optical lens according to embodiment 11 of the present application.

As shown in fig. 11, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4 and a fifth lens element L5.

The first lens L1 is a meniscus lens with negative power, with the object side S1 being convex and the image side S2 being concave. The second lens L2 is a biconcave lens with negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens L3 is a biconvex lens with positive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens L4 is a meniscus lens with positive power, with the object side S8 being convex and the image side S9 being concave. The fifth lens element L5 is a biconvex lens with positive power, and has a convex object-side surface S10 and a convex image-side surface S11.

Table 21 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 11.

TABLE 21

The following table 22 gives the conic coefficients K and high-order term coefficients A, B, C, D, E and F that can be used for the aspherical lens surfaces S3, S4, S6, S7, S10 and S11 in example 11.

Flour mark

K

A

B

C

D

E

F

S3

-9.7142

4.0127E-03

-2.3778E-04

1.0135E-05

-2.7325E-07

3.9052E-09

-2.1932E-11

S4

-4.2159

1.7494E-02

-3.5620E-05

-2.5291E-04

5.3771E-05

-4.1222E-06

1.6341E-07

S6

12.0029

-3.3064E-04

1.1872E-05

-4.7506E-06

6.2525E-07

-2.3630E-08

3.0148E-11

S7

-1.4864

-2.4779E-04

5.1617E-06

3.5799E-06

-4.6217E-07

2.3812E-08

-3.2932E-10

S10

-31.0835

1.7807E-03

-1.2784E-04

5.6789E-06

-5.8092E-07

2.6742E-08

-4.2084E-10

S11

-5.2166

-6.5246E-04

3.3529E-04

-3.7021E-05

1.3961E-06

-1.0071E-08

2.1928E-10

TABLE 22

Example 12

An optical lens according to embodiment 12 of the present application is described below with reference to fig. 12. Fig. 12 is a schematic structural diagram showing an optical lens according to embodiment 12 of the present application.

As shown in fig. 12, the optical lens includes, in order from an object side to an image side along an optical axis, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4 and a fifth lens element L5.

Table 23 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 12.

TABLE 23

The following table 24 gives the conic coefficients K and high-order term coefficients A, B, C, D, E and F that can be used for the aspherical lens surfaces S3, S4, S6, S7, S10 and S11 in example 12.

Flour mark

K

A

B

C

D

E

F

S3

-7.8756

3.3111E-03

-1.9997E-04

9.2131E-06

-2.9271E-07

5.2710E-09

-4.0830E-11

S4

-73.6590

1.5881E-02

2.5101E-04

-2.3581E-04

4.9753E-05

-4.6754E-06

1.8885E-07

S6

10.0529

-7.5432E-04

8.9422E-05

-7.7080E-06

5.6835E-07

-2.1637E-08

-1.3059E-09

S7

-1.6571

-2.6231E-04

-1.0765E-05

9.0131E-06

-4.8179E-07

1.3294E-08

3.1280E-10

S10

-32.0964

1.2910E-03

-9.0875E-05

4.0843E-06

-9.9412E-07

6.2875E-09

1.3783E-09

S11

-75.0308

-1.0615E-03

5.3906E-04

-3.8432E-05

7.7450E-07

-6.3230E-08

3.3240E-09

Watch 24

In summary, examples 1 to 12 each satisfy the relationship shown in table 25 below. In table 25, TTL, H, F, d23, d34, F1, F2, F3, F4, F5, R1, R2, R6, R7, R8 have units of millimeters (mm), and FOV has units of degrees (°).

TABLE 25

The present application also provides an electronic device that may include the optical lens according to the above-described embodiments of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be a stand-alone electronic device such as a range finding camera or may be an imaging module integrated on a device such as a range finding device. Furthermore, the electronic device may also be a stand-alone imaging device such as a vehicle-mounted camera, or may be an imaging module integrated on a driving assistance system such as a car.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. An optical lens, in order from an object side to an image side along an optical axis, comprising: first lens, second lens, third lens, fourth lens and fifth lens characterized in that:

the first lens has negative focal power, 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 has a negative optical power;

the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface;

the fourth lens has positive optical power; and

the fifth lens has a positive optical power,

the maximum field angle FOV of the optical lens, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle FOV satisfy: (FOV x F)/H is not less than 45 degrees,

the curvature radius R7 of the image side surface of the third lens and the curvature radius R8 of the object side surface of the fourth lens meet the following conditions: -10 ≦ (R7-R8)/(R7+ R8) ≦ -1, and

the number of lenses having a power in the optical lens is five.

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

3. An optical lens barrel according to claim 1, wherein the object side surface of the second lens is concave and the image side surface is concave.

4. An optical lens barrel according to claim 1, wherein the fourth lens element has a convex object-side surface and a convex image-side surface.

5. An optical lens barrel according to claim 1, wherein the fourth lens element has a convex object-side surface and a concave image-side surface.

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

7. An optical lens barrel according to claim 1, wherein the fifth lens element has a convex object-side surface and a concave image-side surface.

8. An optical lens according to claim 1, wherein at least two lenses of the first to fifth lenses are aspherical lenses.

9. The optical lens assembly according to any one of claims 1 to 8, wherein a distance TTL between an object side surface of the first lens and an imaging surface of the optical lens on the optical axis, a maximum field angle FOV of the optical lens, and an image height H corresponding to the maximum field angle FOV satisfy:

TTL/H/FOV×180°≤8.1。

10. an optical lens barrel according to any one of claims 1 to 8, wherein a distance d23 between an image side surface of the second lens element and an object side surface of the third lens element on the optical axis and a distance TTL between an object side surface of the first lens element and an image plane of the optical lens on the optical axis satisfy:

0.08≤d23/TTL≤0.35。

11. an optical lens element according to any one of claims 1 to 8, wherein a distance d34 separating an image side surface of the third lens element from an object side surface of the fourth lens element on the optical axis satisfies, with a total effective focal length F of the optical lens element:

d34/F≤0.55。

12. an optical lens according to any one of claims 1 to 8, characterized in that the effective focal length F1 of the first lens and the effective focal length F2 of the second lens satisfy:

0.3≤|F1/F2|≤2.7。

13. an optical lens according to any one of claims 1 to 8, characterized in that the effective focal length F2 of the second lens and the effective focal length F3 of the third lens satisfy:

0.3≤|F2/F3|≤2.5。

14. an optical lens barrel according to any one of claims 1 to 8, wherein a radius of curvature R1 of the object side surface of the first lens and a radius of curvature R2 of the image side surface of the first lens satisfy:

1.5≤R1/R2≤5。

15. an optical lens barrel according to any one of claims 1 to 8, wherein a radius of curvature R6 of an object side surface of the third lens and a radius of curvature R7 of an image side surface of the third lens satisfy:

1≤|R6/R7|≤6。

16. an optical lens barrel according to any one of claims 1 to 8, wherein a separation distance d23 on the optical axis from the image-side surface of the second lens to the object-side surface of the third lens and a separation distance d34 on the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens satisfy:

d23/d34≥8。

17. an optical lens, in order from an object side to an image side along an optical axis, comprising: first lens, second lens, third lens, fourth lens and fifth lens characterized in that:

the first lens has a negative optical power;

the second lens has a negative optical power;

the third lens has positive optical power;

the fourth lens has positive optical power; and

the fifth lens has positive focal power;

wherein a separation distance d34 between the image side surface of the third lens and the object side surface of the fourth lens on the optical axis and the total effective focal length F of the optical lens satisfy: d34/F is less than or equal to 0.55,

the number of lenses having a power in the optical lens is five.

18. An optical lens barrel according to claim 17, wherein the first lens element has a convex object-side surface and a concave image-side surface.

19. An optical lens barrel according to claim 17, wherein the second lens element has a convex object-side surface and a concave image-side surface.

20. An optical lens barrel according to claim 17, wherein the second lens element has a concave object-side surface and a concave image-side surface.

21. An optical lens barrel according to claim 17, wherein the third lens element has a convex object-side surface and a convex image-side surface.

22. An optical lens barrel according to claim 17, wherein the fourth lens element has a convex object-side surface and a convex image-side surface.

23. An optical lens barrel according to claim 17, wherein the fourth lens element has a convex object-side surface and a concave image-side surface.

24. An optical lens barrel according to claim 17, wherein the fifth lens element has a convex object-side surface and a convex image-side surface.

25. An optical lens barrel according to claim 17, wherein the fifth lens element has a convex object-side surface and a concave image-side surface.

26. An optical lens barrel according to claim 17, wherein at least two lenses of the first to fifth lenses are aspherical lenses.

27. An optical lens barrel according to any one of claims 17 to 26, wherein a distance TTL between an object side surface of the first lens element and an imaging surface of the optical lens along the optical axis, a maximum field angle FOV of the optical lens, and an image height H corresponding to the maximum field angle FOV satisfy:

TTL/H/FOV×180°≤8.1。

28. an optical lens element according to any one of claims 17 to 26, wherein a distance d23 between an image-side surface of the second lens element and an object-side surface of the third lens element on the optical axis and a distance TTL between an object-side surface of the first lens element and an image plane of the optical lens element on the optical axis satisfy:

0.08≤d23/TTL≤0.35。

29. an optical lens as claimed in any one of claims 17 to 26, characterized in that the effective focal length F1 of the first lens and the effective focal length F2 of the second lens satisfy:

0.3≤|F1/F2|≤2.7。

30. an optical lens as claimed in any one of claims 17 to 26, characterized in that the effective focal length F2 of the second lens and the effective focal length F3 of the third lens satisfy:

0.3≤|F2/F3|≤2.5。

31. an optical lens barrel according to any one of claims 17 to 26, wherein the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy:

1.5≤R1/R2≤5。

32. an optical lens barrel according to any one of claims 17 to 26, wherein a radius of curvature R6 of the object side surface of the third lens and a radius of curvature R7 of the image side surface of the third lens satisfy:

1≤|R6/R7|≤6。

33. an optical lens element according to any one of claims 17 to 26, wherein a distance d23 separating the image-side surface of the second lens element from the object-side surface of the third lens element on the optical axis and a distance d34 separating the image-side surface of the third lens element from the object-side surface of the fourth lens element on the optical axis satisfy:

d23/d34≥8。

34. an electronic apparatus, characterized by comprising the optical lens according to claim 1 or 17 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.