CN115201997A

CN115201997A - Optical lens and electronic device

Info

Publication number: CN115201997A
Application number: CN202110377505.XA
Authority: CN
Inventors: 张俊明; 徐超; 姚波; 俞魁榜
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2022-10-18
Anticipated expiration: 2041-04-08
Also published as: CN115201997B

Abstract

The application discloses an optical lens and an electronic device including the same. The optical lens sequentially comprises the following components from an object side to an image side along an optical axis: the image side surface of the first lens is a convex surface; the second lens with positive focal power has a convex object-side surface and a convex image-side surface; a third lens having a negative refractive power, the object-side surface of which is concave; a fourth lens having a focal power, wherein the object-side surface of the fourth lens is a concave surface, and the image-side surface of the fourth lens is a convex surface; and a fifth lens element with positive refractive power having a convex object-side surface and a concave image-side surface.

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 apparatus.

Background

With the improvement of the imaging quality of the optical lens, the optical lens is widely applied in various fields, for example, the optical lens plays an irreplaceable role in various fields such as intelligent detection, security monitoring, smart phones and automobile auxiliary driving. Meanwhile, lens manufacturers in various fields begin to invest a lot of time and effort in the development of lens performance without losing their own competitiveness in order to improve their product competitiveness.

In recent years, automobile driving assistant systems have been developed at a high speed, and vehicle-mounted lenses are used as one of main tools for acquiring external information by the driving assistant systems, and are increasingly widely applied to automobiles. Meanwhile, the demand of the user for miniaturization of the onboard lens is more and more prominent. In addition, in view of safety, the vehicle-mounted lens applied to the field of automatic driving needs to have higher stability so as to be capable of adapting to various severe environments, and the problems that the imaging performance of the lens is easily reduced when the vehicle-mounted lens is used in different environments and the like are avoided.

At present, in order to improve the imaging quality of the lens, the number of lenses is increased in the market, but the size and the weight of the lens are increased by a lens structure with multiple lenses. Further, the lens structure with a large number of lenses causes a problem of cost increase, and also seriously affects miniaturization of the lens.

Disclosure of Invention

The present application provides an optical lens, which includes, in order from an object side to an image side along an optical axis: the image side surface of the first lens is a convex surface; the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a convex surface; a third lens having a negative refractive power, the object-side surface of which is concave; a fourth lens having a focal power, wherein the object-side surface of the fourth lens is a concave surface, and the image-side surface of the fourth lens is a convex surface; and a fifth lens element with positive refractive power having a convex object-side surface and a concave image-side surface.

In one embodiment, the object side surface of the first lens is convex.

In one embodiment, the object side surface of the first lens is concave.

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

In one embodiment, the image side surface of the third lens is concave.

In one embodiment, the fourth lens has a positive or negative power.

In one embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens may satisfy: F/ENPD is less than or equal to 1.48.

In one embodiment, the total length TTL of the optical lens and the total effective focal length F of the optical lens satisfy: TTL/F is less than or equal to 4.5.

In one embodiment, the total length TTL of the optical lens, the maximum field angle FOV of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: TTL/H/FOV is less than or equal to 0.3.

In one embodiment, the maximum field angle FOV of the optical lens, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: D/H/FOV is less than or equal to 0.1.

In one embodiment, a distance BFL on the optical axis from the center of the image-side surface of the fifth lens to the image plane of the optical lens and a distance TL on the optical axis from the center of the object-side surface of the first lens to the center of the image-side surface of the fifth lens may satisfy: BFL/TL is more than or equal to 0.15.

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 of the optical lens may satisfy: (FOV F)/H is less than or equal to 70.

In one embodiment, a distance BFL from a center of an image-side surface of the fifth lens element to an image plane of the optical lens on the optical axis and a total length TTL of the optical lens may satisfy: BFL/TTL is more than or equal to 0.1.

In one embodiment, the radius of curvature R4 of the object-side surface of the second lens and the radius of curvature R5 of the image-side surface of the second lens may satisfy: R4/R5 is more than or equal to 0.5 and less than or equal to 2.

In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens may satisfy: F1/F is more than or equal to 2.

In one embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens may satisfy: and the | F4/F | > is more than or equal to 2.

In one embodiment, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens may satisfy: F2/F3 is more than or equal to 0.45 and less than or equal to 2.

In one embodiment, the Sag7 at the maximum clear aperture of the object-side surface of the fourth lens corresponding to the maximum field angle of the optical lens and the Sag8 at the maximum clear aperture of the image-side surface of the fourth lens corresponding to the maximum field angle of the optical lens may satisfy: 0.5 to 1.5 of Sag 7/Sag 8.

In one embodiment, the Sag9 at the maximum clear aperture of the object-side surface of the fifth lens corresponding to the maximum field angle of the optical lens and the Sag10 at the maximum clear aperture of the image-side surface of the fifth lens corresponding to the maximum field angle of the optical lens may satisfy: the ratio of Sag9 to Sag10 is more than or equal to 1.5.

In one embodiment, the optical lens further includes a stop disposed between the object side and the first lens, where a maximum field angle FOV of the optical lens, an image height H corresponding to the maximum field angle of the optical lens, a distance L from a center of the stop to an image plane of the optical lens on the optical axis, and a total length TTL of the optical lens may satisfy: FOV multiplied by H/L/TTL is less than or equal to 0.7.

In one embodiment, the total effective focal length F of the optical lens, the maximum field angle FOV of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: 0.5 is less than or equal to | F × tan (FOV/2)/(H/2) | is less than or equal to 2.

In one embodiment, the image height H corresponding to the maximum field angle of the optical lens and the total length TTL of the optical lens satisfy: TTL/H is more than or equal to 2.5 and less than or equal to 7.

In one embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens may satisfy: F/H is more than or equal to 1.5 and less than or equal to 3.

In one embodiment, the optical lens further includes a stop disposed between the object side and the first lens, and a distance SL on the optical axis from the stop to a center of an image side surface of the fifth lens and a distance BFL on the optical axis from the center of the image side surface of the fifth lens to an imaging surface of the optical lens may satisfy: BFL/SL is more than or equal to 0.15.

Another aspect of the present application provides an optical lens. The optical lens sequentially comprises from an object side to an image side along an optical axis: a first lens having a positive optical power; a second lens having a positive optical power; a third lens having a negative optical power; a fourth lens having a positive optical power; and a fifth lens having positive optical power. The total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens can satisfy the following conditions: F/ENPD is less than or equal to 1.48.

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

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

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

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

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

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

In one embodiment, the fourth lens has a positive or negative power.

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

In one embodiment, the optical lens further includes a stop disposed between the object side and the first lens.

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 of the optical lens may satisfy: (FOV x F)/H is less than or equal to 70.

In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens may satisfy: F1/F is not less than 2.

In one embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens may satisfy: and | F4/F | > 2.

In one embodiment, the rise Sag9 at the maximum clear aperture of the object-side surface of the fifth lens corresponding to the maximum field angle of the optical lens and the rise Sag10 at the maximum clear aperture of the image-side surface of the fifth lens corresponding to the maximum field angle of the optical lens may satisfy: the ratio of Sag9 to Sag10 is more than or equal to 1.5.

In one embodiment, the maximum field angle FOV of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, the distance L from the center of the stop to the imaging surface of the optical lens on the optical axis, and the total length TTL of the optical lens may satisfy: FOV multiplied by H/L/TTL is less than or equal to 0.7.

In one embodiment, the optical lens further includes a diaphragm disposed between the object side and the first lens, and a distance SL between the diaphragm and a center of an image side surface of the fifth lens on an optical axis and a distance BFL between the center of the image side surface of the fifth lens and the imaging surface of the optical lens on the optical axis may satisfy: BFL/SL is more than or equal to 0.15.

Another aspect of the present application provides an electronic device. The electronic device comprises the optical lens provided by the application and an imaging element for converting an optical image formed by the optical lens into an electric signal.

This application makes this optical lens have little light ring, miniaturization, longer back burnt, little CRA, preferred temperature performance, high resolution, the high and good beneficial effect of at least one of formation of image quality etc. of assemblability through the focal power and the face type characteristic of reasonable setting each lens.

Drawings

Other features, objects, and advantages of the present application will become more apparent from the following detailed description of the 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 view showing a structure of 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 view showing a structure of an optical lens according to embodiment 6 of the present application;

fig. 7 is a schematic view showing a structure of 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; and

fig. 9 is a schematic diagram showing the rise SAG of the object side S of the lens L according to the present application.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully 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-forming 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 examples or illustrations.

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 accompanying drawings in conjunction with embodiments.

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 plane may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS).

In an exemplary embodiment, the first lens may have a positive optical power. The first lens may have a biconvex or a meniscus type. The arrangement of the focal power and the surface type of the first lens is beneficial to collecting more light rays to enter a rear optical system and increasing the luminous flux. Illustratively, the first lens may have a larger effective focal length, which is beneficial to smooth transition of light to the rear, which is beneficial to realizing a smaller aperture, and is beneficial to improving the resolution quality of the lens.

In an exemplary embodiment, the second lens may have a positive optical power. The second lens may have a biconvex shape. This kind of focal power and face type setting of second lens are favorable to the second lens to collect light, make the smooth transition of light trend, are favorable to making wide-angle light get into the second lens as much as possible simultaneously, promote the camera lens illuminance.

In an exemplary embodiment, the third lens may have a negative power. The third lens may have a biconcave or meniscus type. The focal power and the surface type of the third lens are arranged, so that the light rays can be further diffused, the light ray angle can be adjusted, the peripheral light rays can be smoothly transited, the sensitivity of the lens of the third lens can be reduced, and the imaging quality can be improved.

In exemplary embodiments, the fourth lens may have a positive power or a negative power. The fourth lens may have a meniscus type. The focal power and the surface type of the fourth lens are favorable for converging light rays and adjusting the angle of the light rays, so that the trend of the light rays is stably transited to the rear part. Through the effective focal length of reasonable setting fourth lens, can control the trend of light between third lens to fifth lens, be favorable to making the compact structure of each lens.

In an exemplary embodiment, the fifth lens may have a positive optical power. The fifth lens may have a convex-concave type. The focal power and the surface type of the fifth lens are favorable for further converging light rays collected by the fourth lens, so that CRA (craradiation cross-section) and the like of the lens can be effectively reduced, the lens is more suitable for being used in a low-light environment, and the resolution capability of the lens is improved.

In an exemplary embodiment, a stop for limiting the light beam may be disposed between the object side and the first lens to further improve the imaging quality of the optical lens. The diaphragm is arranged between the object side and the first lens, so that the aperture of the diaphragm is increased, the aperture of the front end of the lens is reduced, and the sensitivity of the lens can be structurally reduced. Meanwhile, the light rays entering the optical lens can be effectively converged, and the aperture of the lens of the optical lens is reduced. In particular, the diaphragm is arranged between the object side and the first lens, so that not only is the addition of a folded optical path device and the like on the optical path facilitated, but also the matching of the optical lens provided by the application and other lens components and the like is facilitated. In the embodiment of the present application, the stop may be disposed in the vicinity of the object side surface of the first 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, an optical lens according to the present application may satisfy: BFL/SL is more than or equal to 0.15, wherein SL is the distance between the diaphragm and the center of the image side surface of the fifth lens on the optical axis, and BFL is the distance between the center of the image side surface of the fifth lens and the imaging surface of the optical lens on the optical axis. More specifically, BFL and SL may further satisfy: BFL/SL is more than or equal to 0.18. The BFL/SL is more than or equal to 0.15, the BFL of the rear focus of the lens is longer on the basis of realizing miniaturization, and the assembly of the lens is facilitated.

In an exemplary embodiment, an optical lens according to the present application may satisfy: F/ENPD is less than or equal to 1.48, wherein F is the total effective focal length of the optical lens, and ENPD is the entrance pupil diameter of the optical lens. More specifically, F and ENPD may further satisfy: F/ENPD is less than or equal to 1.3. The requirement that F/ENPD is less than or equal to 1.48 is met, and the lens has the characteristic of small aperture so as to increase the light incoming quantity of the lens.

In an exemplary embodiment, an optical lens according to the present application may satisfy: TTL/F is less than or equal to 4.5, where TTL is the total length of the optical lens, and specifically, when the optical lens is disposed with a diaphragm, if the diaphragm is located between the object side and the first lens element, TTL is the distance from the center of the diaphragm to the optical axis of the imaging plane of the optical lens, otherwise TTL is the distance from the center of the object side of the first lens element to the optical axis of the imaging plane of the optical lens, and F is the total effective focal length of the optical lens. More specifically, TTL and F further satisfy: TTL/F is less than or equal to 3. The TTL/F is less than or equal to 4.5, the length of the lens can be effectively limited, and the miniaturization of the lens is realized.

In an exemplary embodiment, an optical lens according to the present application may satisfy: TTL/H/FOV is less than or equal to 0.3, where TTL is the total length of the optical lens, specifically, when the optical lens is provided with a diaphragm, if the diaphragm is located between the object side and the first lens, TTL is the distance from the center of the diaphragm to the optical axis of the imaging plane of the optical lens, otherwise TTL is the distance from the center of the object side of the first lens to the optical axis of the imaging plane of the optical lens, FOV is the maximum field angle of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens. More specifically, TTL, H, and FOV further satisfy: TTL/H/FOV is less than or equal to 0.25. The TTL/H/FOV is less than or equal to 0.3, and the lens can be miniaturized by effectively reducing the length of the lens under the condition of keeping the imaging surface and the image height unchanged.

In an exemplary embodiment, an optical lens according to the present application may satisfy: D/H/FOV is less than or equal to 0.1, wherein FOV is the maximum field angle of the optical lens, D is the maximum clear aperture of the object side surface of the first lens corresponding to the maximum field angle of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens. More specifically, D, H and FOV further may satisfy: D/H/FOV is less than or equal to 0.09. The D/H/FOV is less than or equal to 0.1, the front end caliber is favorably reduced, and the miniaturization can be realized.

In an exemplary embodiment, an optical lens according to the present application may satisfy: BFL/TL is more than or equal to 0.15, wherein BFL is the distance between the center of the image side surface of the fifth lens and the imaging surface of the optical lens on the optical axis, TL is the distance between the center of the object side surface of the first lens and the center of the image side surface of the fifth lens on the optical axis. More specifically, BFL and TL may further satisfy: BFL/TL is more than or equal to 0.18. The BFL/TL is more than or equal to 0.15, thereby being beneficial to realizing the miniaturization, leading the BFL of the back focus to be longer and being beneficial to the assembly of the lens.

In an exemplary embodiment, an optical lens according to the present application may satisfy: (FOV F)/H ≦ 70, wherein FOV is the maximum field angle of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens. More specifically, FOV, F and H further satisfy: (FOV XF)/H is less than or equal to 65. Satisfying (FOV multiplied by F)/H is less than or equal to 70, which is beneficial to causing the lens to satisfy short focus and small field angle simultaneously and realizing small distortion.

In an exemplary embodiment, an optical lens according to the present application may satisfy: the BFL/TTL is greater than or equal to 0.1, where BFL is a distance on the optical axis from the center of the image-side surface of the fifth lens element to the imaging surface of the optical lens, and TTL is a total length of the optical lens, and specifically, when the optical lens is provided with a diaphragm, if the diaphragm is located between the object side and the first lens element, TTL is a distance on the optical axis from the center of the diaphragm to the imaging surface of the optical lens, and otherwise, TTL is a distance on the optical axis from the center of the object-side surface of the first lens element to the imaging surface of the optical lens. More specifically, BFL and TTL further satisfy: BFL/TTL is more than or equal to 0.12. The requirement that BFL/TTL is more than or equal to 0.1 is met, the back focus BFL is longer on the basis of realizing miniaturization, CRA is reduced, and imaging quality is improved.

In an exemplary embodiment, an optical lens according to the present application may satisfy: R4/R5 is 0.5 ≦ 2, where R4 is a radius of curvature of the object-side surface of the second lens, and R5 is a radius of curvature of the image-side surface of the second lens. More specifically, R4 and R5 may further satisfy: R4/R5 is more than or equal to 0.8 and less than or equal to 1.5. R4/R5 is more than or equal to 0.5 and less than or equal to 2, thereby being beneficial to smooth transition of light and improving image quality.

In an exemplary embodiment, an optical lens according to the present application may satisfy: F1/F is larger than or equal to 2, wherein F1 is the effective focal length of the first lens, and F is the total effective focal length of the optical lens. More specifically, F1 and F further satisfy: F1/F is not less than 4. The requirement that F1/F is more than or equal to 2 is met, the effective focal length of the first lens is larger, light is smoothly transited, and the sensitivity of the first lens is reduced.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F4/F | ≧ 2, wherein F4 is the effective focal length of the fourth lens, and F is the total effective focal length of the optical lens. More specifically, F4 and F further satisfy: and the | F4/F | is more than or equal to 2.5. The requirement that the absolute value of F4/F is more than or equal to 2 is met, the effective focal length of the fourth lens is favorably larger, the light is favorably and smoothly transited, and the sensitivity of the fourth lens is reduced.

In an exemplary embodiment, an optical lens according to the present application may satisfy: F2/F3 is less than or equal to 0.45 and less than or equal to 2, wherein F2 is the effective focal length of the second lens, and F3 is the effective focal length of the third lens. More specifically, F2 and F3 further satisfy: F2/F3 is more than or equal to 0.5 and less than or equal to 1.5. F2/F3 is more than or equal to 0.45 and less than or equal to 2, thereby being beneficial to smooth transition of light and improving image quality.

In the exemplary embodiment, as shown in fig. 9, D1 is a half aperture of the maximum clear aperture of the object-side surface S of the lens L corresponding to the maximum field angle of the optical lens, and the rise SAG is a distance a on the optical axis from an intersection point a of the object-side surface S of the lens L and the optical axis to the maximum clear aperture of the object-side surface S of the lens L. The optical lens according to the present application can satisfy: sag8/Sag7 is not less than 0.5 and not more than 1.5, wherein Sag7 is the rise at the maximum clear aperture of the object side surface of the fourth lens corresponding to the maximum field angle of the optical lens, namely Sag7 is the distance from the intersection point of the object side surface of the fourth lens and the optical axis to the maximum clear aperture of the object side surface of the fourth lens on the optical axis, and Sag8 is the rise at the maximum clear aperture of the image side surface of the fourth lens corresponding to the maximum field angle of the optical lens. More specifically, sag8 and Sag7 further satisfy: sag8/Sag7 is more than or equal to 0.6 and less than or equal to 1.4. Meets the requirement that Sag8/Sag7 is more than or equal to 0.5 and less than or equal to 1.5, and is beneficial to smooth transition of light.

In an exemplary embodiment, an optical lens according to the present application may satisfy: sag9/Sag10 is larger than or equal to 1.5, wherein Sag9 is the rise at the maximum clear aperture of the object side surface of the fifth lens corresponding to the maximum field angle of the optical lens, and Sag10 is the rise at the maximum clear aperture of the image side surface of the fifth lens corresponding to the maximum field angle of the optical lens. More specifically, sag9 and Sag10 further satisfy: the ratio of Sag9 to Sag10 is more than or equal to 1.7. The Sag9/Sag10 is more than or equal to 1.5, so that the light collection by the fourth lens is facilitated, the light is enabled to be stably transited to the rear, the lens aberration is effectively reduced, and the imaging quality is improved.

In an exemplary embodiment, an optical lens according to the present application may satisfy: the FOV multiplied by H/L/TTL is less than or equal to 0.7, wherein the FOV is the maximum field angle of the optical lens, the H is the image height corresponding to the maximum field angle of the optical lens, the L is the distance between the center of the diaphragm and the imaging surface of the optical lens on the optical axis, and the TTL is the total length of the optical lens. More specifically, FOV, H, L and TTL further may satisfy: FOV multiplied by H/L/TTL is less than or equal to 0.4. The FOV multiplied by H/L/TTL is less than or equal to 0.7, so that the lens has a smaller CRA on the basis of ensuring the field angle and the imaging surface of the lens to be in a reasonable range.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F × tan (FOV/2)/(H/2) | is less than or equal to 0.5, wherein F is the total effective focal length of the optical lens, FOV is the maximum angle of view of the optical lens, and H is the image height corresponding to the maximum angle of view of the optical lens. More specifically, F, FOV and H further satisfy: 0.8 is less than or equal to | F × tan (FOV/2)/(H/2) | is less than or equal to 1.5. The absolute value of F multiplied by tan (FOV/2)/(H/2) | is less than or equal to 2 and is more favorable for realizing small distortion.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and TTL/H is not less than 2.5 and not more than 7, wherein H is an image height corresponding to the maximum field angle of the optical lens, TTL is the total length of the optical lens, specifically, when a diaphragm is arranged in the optical lens, if the diaphragm is positioned between the object side and the first lens, TTL is the distance from the center of the diaphragm to the imaging surface of the optical lens on the optical axis, and otherwise TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis. More specifically, TTL and H may further satisfy: TTL/H is more than or equal to 3 and less than or equal to 5. TTL/H is more than or equal to 2.5 and less than or equal to 7, the length of the lens can be effectively limited, and the miniaturization of the lens is realized.

In an exemplary embodiment, an optical lens according to the present application may satisfy: F/H is more than or equal to 1.5 and less than or equal to 3, wherein F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens. More specifically, F and H further satisfy: F/H is more than or equal to 2 and less than or equal to 2.8. F/H is more than or equal to 1.5 and less than or equal to 3, the total effective focal length and the image height of the lens can be controlled within a certain range, and the improvement of the resolution is facilitated. In an exemplary embodiment, the optical lens of the present application may further include a filter and/or a cover glass disposed between the fifth lens and the image plane to filter light rays having different wavelengths and prevent an image side element (e.g., a chip) of the optical lens from being damaged, as needed.

As known to those skilled in the art, cemented lenses can be used to minimize or eliminate chromatic aberration. The cemented lens is used in the optical lens, so that the image quality can be improved, the reflection loss of light energy can be reduced, high resolution can be realized, and the imaging definition of the lens can be improved. In addition, the use of the cemented lens can also simplify the assembly process in the lens manufacturing process.

In an exemplary embodiment, the second lens and the third lens may be cemented to form a cemented lens. The second lens with positive focal power and the object side surface and the image side surface both being convex surfaces is glued with the third lens with negative focal power and the object side surface being concave surfaces, so that light rays emitted by the front lens can be smoothly transited to the imaging surface of the optical lens, the structure of the optical lens is compact, the size of the optical lens is reduced, various aberrations of the optical lens are corrected, the matching sensitivity of each lens is reduced, the resolution is improved, and the optical performances such as distortion, CRA and the like are optimized. Of course, the second lens and the third lens may not be cemented, which is advantageous for improving the resolution.

The gluing mode adopted between the lenses has at least one of the following advantages: the air space between the two lenses is reduced, so that the optical system is compact as a whole; the assembly parts between the second lens and the third lens are reduced, the working procedures are reduced, and the cost is reduced; the tolerance sensitivity problems of inclination/core deviation and the like of the lens unit in the assembling process are reduced; the light quantity loss caused by reflection between the lenses is reduced, and the illumination is improved; the self color difference is reduced, and the whole color difference of the system can be balanced by the residual partial color difference.

In an exemplary embodiment, the fourth lens and the fifth lens may be aspherical lenses; the first lens, the second lens, and the third lens may be spherical lenses. The specific number of the spherical lenses and the aspherical lenses is not particularly limited, and the number of the aspherical lenses can be increased when the imaging quality is mainly embodied. In particular, in order to improve the resolution quality of the optical system, the first lens, the second lens, the third lens, the fourth lens, and the fifth lens may all be 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 arrangement of the aspheric lens helps to correct system aberration and improve the resolution.

According to the optical lens of the above embodiment of the present application, by reasonably setting the focal power and the surface type characteristics of each lens, in the case of only using 5 lenses, the optical lens has at least one beneficial effect of small aperture, miniaturization, back focal length, small CRA, good temperature performance, high resolution, high assemblability, low cost, good imaging quality, and the like. On the basis of meeting the requirement of a small aperture, the optical lens can reasonably match the focal power, the surface type and the material of each lens, so that the optical lens can meet the requirements of high resolution, rear focal length, small CRA and the like. In addition, the optical lens has short total length and long back focus, is easy to assemble and adjust, and is convenient to assemble in a limited space in some special fields.

According to the optical lens of the embodiment of the application, the cemented lens is arranged, the whole chromatic aberration correction of the system is shared, the system aberration is favorably corrected, the system resolution quality is improved, the matching sensitivity problem is reduced, the whole compact structure of the optical system is favorably realized, and the miniaturization requirement is met.

In an exemplary embodiment, the first lens, the second lens, the third lens, the fourth lens, and the fifth lens may all be glass lenses. The optical lens made of glass can inhibit the deviation of the back focus of the optical lens along with the temperature change so as to improve the stability of the system. Meanwhile, the glass material is adopted, so that the problem that the normal use of the lens is influenced due to the imaging blur of the lens caused by high and low temperature changes in the use environment can be avoided. The lens provided by the application can be designed by adopting all-glass, so that the working temperature range of the lens is wider, and the stable optical performance can be kept within the range of-40 ℃ to 105 ℃. Specifically, when the resolution quality and reliability are important, the first lens to the fifth lens may be all glass aspheric lenses. Of course, in the application where the requirement of temperature stability is low, the first lens to the fifth lens in the optical lens can also be made of plastic. The optical lens is made of plastic, so that the manufacturing cost can be effectively reduced. Of course, the first lens to the fifth lens in the optical lens may also be made of plastic and glass in a matched manner.

However, it will be appreciated by those skilled in the art that the number of lenses constituting the lens barrel can be varied to achieve the various results and advantages described in the present specification without departing from the claimed technical solution. 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 assembly includes, in order from an object side to an image side, 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 element L1 is a biconvex lens element with positive refractive power, and has a convex object-side surface S2 and a convex image-side surface S3. The second lens element L2 is a biconvex lens with positive refractive power, and has a convex object-side surface S4 and a convex image-side surface S5. The third lens element L3 is a biconcave lens element with negative refractive power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 is a meniscus lens element having positive refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 is a convex-concave lens element having positive refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The second lens L2 and the third lens L3 may be cemented to constitute a cemented lens.

The optical lens may further include a stop STO, which may be disposed between the object side and the first lens L1 to improve imaging quality. For example, the stop STO may be disposed between the object side and the first lens L1 at a position close to the object side surface S2 of the first lens L1. In the present embodiment, TTL is the distance on the optical axis from the center of the stop to the imaging surface of the optical lens.

Optionally, the optical lens may further include an image sensing chip IMA located at the imaging plane. The light from the object sequentially passes through the stop STO to the image side surface S10 of the fifth lens L5 and is finally imaged on the imaging surface.

Table 1 shows a radius of curvature R, a thickness/distance d (it is understood that the thickness/distance d of the row in which S1 is located is the center thickness d1 of the first lens L1, the thickness/distance d of the row in which S2 is located is the separation distance 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

In embodiment 1, the object-side surface S7 and the image-side surface S8 of the fourth lens L4 and the object-side surface S9 and the image-side surface S10 of the fifth lens L5 may be aspheric, and the surface type x of each aspheric lens may be defined by, but is not limited to, the following aspheric formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex 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 =1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspheric surface. The conical coefficient k and the high-order term coefficients A4, A6, A8, a10, and a12 that can be used for each of the aspherical mirror surfaces S7 to S10 in example 1 are given in table 2 below.

Flour mark

k

A4

A6

A8

A10

A12

S7

-3.5000E+00

-4.5068E-04

8.6514E-06

5.1409E-07

-7.2422E-09

2.3478E-11

S8

-5.0000E-01

1.5890E-03

-3.3995E-05

1.6178E-06

-3.5132E-08

4.5179E-10

S9

-7.8654E-01

-3.6570E-04

3.6435E-06

-1.1000E-07

0.0000E+00

S10

-7.7620E+00

-6.8744E-05

-2.0012E-05

2.2553E-07

0.0000E+00

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 assembly includes, in order from an object side to an image side, 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 element L1 is a biconvex lens element with positive refractive power, and has a convex object-side surface S2 and a convex image-side surface S3. The second lens element L2 is a biconvex lens element with positive refractive power, and has a convex object-side surface S4 and a convex image-side surface S5. The third lens element L3 is a biconcave lens element with negative refractive power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 is a meniscus lens element having positive refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 is a convex-concave lens element having positive refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The second lens L2 and the third lens L3 may be cemented to constitute a cemented lens.

The optical lens may further include a stop STO, which may be disposed between the object side and the first lens L1 to improve imaging quality. For example, the stop STO may be disposed between the object side and the first lens L1 at a position close to the object side surface S2 of the first lens L1. In this embodiment, TTL is the distance from the center of the stop to the imaging plane of the optical lens on the optical axis.

Table 3 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 2. Table 4 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 3

Flour mark

k

A4

A6

A8

A10

A12

S7

-3.4521E+00

-4.5101E-04

8.6787E-06

5.1627E-07

-7.1175E-09

3.1164E-11

S8

-5.6000E-01

1.5896E-03

-3.3987E-05

1.6183E-06

-3.5065E-08

4.5690E-10

S9

-7.8425E-01

-3.6363E-04

3.7507E-06

-1.1106E-07

0.0000E+00

S10

-9.0124E+00

-8.0486E-05

-2.0413E-05

2.4473E-07

0.0000E+00

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 assembly includes, in order from an object side to an image side, 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 element L1 is a biconvex lens element with positive refractive power, and has a convex object-side surface S2 and a convex image-side surface S3. The second lens element L2 is a biconvex lens element with positive refractive power, and has a convex object-side surface S4 and a convex image-side surface S5. The third lens element L3 is a negative meniscus lens element, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 is a meniscus lens element having positive refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 is a convex-concave lens element having positive refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The second lens L2 and the third lens L3 may be cemented to constitute a cemented lens.

Table 5 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 3. Table 6 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 5

Flour mark

k

A4

A6

A8

A10

A12

S7

-2.6232E+00

-7.2582E-04

-3.0272E-06

3.8918E-07

1.5197E-08

-4.8292E-10

S8

-6.0103E-01

1.4242E-03

-4.2584E-05

1.5358E-06

-2.1308E-08

1.6271E-10

S9

-5.9581E-01

-4.7167E-04

1.1353E-06

-2.2222E-07

0.0000E+00

S10

-3.1633E+01

7.8450E-04

-4.9247E-05

5.4207E-07

0.0000E+00

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 assembly includes, in order from an object side to an image side, 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 element L1 is a biconvex lens with positive refractive power, and has a convex object-side surface S2 and a convex image-side surface S3. The second lens element L2 is a biconvex lens with positive refractive power, and has a convex object-side surface S4 and a convex image-side surface S5. The third lens element L3 is a concave-convex lens element with negative refractive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 is a meniscus lens element having positive refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 is a convex-concave lens element having positive refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The second lens L2 and the third lens L3 may be cemented to constitute a cemented lens.

Table 7 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 4. Table 8 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 7

Flour mark

k

A4

A6

A8

A10

A12

S7

-2.6103E+00

-7.2946E-04

-3.0785E-06

3.9014E-07

1.5259E-08

-4.8095E-10

S8

-6.0124E-01

1.4255E-03

-4.2581E-05

1.5350E-06

-2.1332E-08

1.6223E-10

S9

-5.5899E-01

-4.6784E-04

1.2422E-06

-2.1971E-07

0.0000E+00

S10

-3.2456E+01

7.7249E-04

-4.9330E-05

5.8271E-07

0.0000E+00

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 assembly includes, in order from an object side to an image side, 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 element L1 is a meniscus lens element with positive refractive power, and has a concave object-side surface S2 and a convex image-side surface S3. The second lens element L2 is a biconvex lens element with positive refractive power, and has a convex object-side surface S4 and a convex image-side surface S5. The third lens element L3 is a biconcave lens element with negative refractive power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 is a meniscus lens element having positive refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 is a convex-concave lens element having positive refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The second lens L2 and the third lens L3 may be cemented to constitute a cemented lens.

Table 9 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 5. Table 10 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 9

Flour mark

k

A4

A6

A8

A10

A12

S7

-4.5884E+00

-3.6854E-04

-4.5402E-06

4.4970E-07

2.0884E-10

-6.7308E-11

S8

-3.1629E-01

9.6957E-04

-3.3520E-05

1.7034E-06

-3.4176E-08

3.5046E-10

S9

-9.4133E-01

-5.4943E-04

1.4428E-05

-6.5554E-07

0.0000E+00

S10

-5.6396E+00

1.5267E-03

-6.9843E-05

1.8335E-07

0.0000E+00

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 assembly includes, in order from an object side to an image side, 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 element L1 is a meniscus lens element with positive refractive power, and has a concave object-side surface S2 and a convex image-side surface S3. The second lens element L2 is a biconvex lens with positive refractive power, and has a convex object-side surface S4 and a convex image-side surface S5. The third lens element L3 is a biconcave lens element with negative refractive power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 is a meniscus lens element having positive refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 is a convex-concave lens element having positive refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The second lens L2 and the third lens L3 may be cemented to constitute a cemented lens.

Table 11 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 6. Table 12 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 11

Flour mark

k

A4

A6

A8

A10

A12

S7

-5.1036E+00

-3.7076E-04

-4.8761E-06

4.4166E-07

1.2209E-10

-7.5166E-11

S8

-4.5210E-01

9.6495E-04

-3.3465E-05

1.7019E-06

-3.4366E-08

3.4364E-10

S9

-8.7520E-01

-5.4423E-04

1.4302E-05

-6.5756E-07

0.0000E+00

S10

-6.0248E+00

1.5239E-03

-6.9974E-05

2.0751E-07

0.0000E+00

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 view of an optical lens according to embodiment 7 of the present application.

As shown in fig. 7, the optical lens assembly includes, in order from an object side to an image side, 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 element L1 is a meniscus lens element having positive refractive power, and has a concave object-side surface S2 and a convex image-side surface S3. The second lens element L2 is a biconvex lens element with positive refractive power, and has a convex object-side surface S4 and a convex image-side surface S5. The third lens element L3 is a concave-convex lens element with negative refractive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 is a negative meniscus lens element, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 is a convex-concave lens element having positive refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The second lens L2 and the third lens L3 may be cemented to constitute a cemented lens.

Table 13 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 7. Table 14 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 13

Flour mark

k

A4

A6

A8

A10

A12

S7

-2.7460E+00

-7.5064E-04

1.1058E-05

3.4433E-07

-1.1380E-08

2.2626E-10

S8

-5.4678E-01

1.2446E-03

-3.1748E-05

2.0801E-06

-5.8746E-08

7.5941E-10

S9

-1.1073E+00

-7.9539E-04

2.6001E-05

-6.4584E-07

0.0000E+00

S10

-9.4228E+00

2.1979E-04

-2.6438E-05

-4.1935E-08

0.0000E+00

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 assembly includes, in order from an object side to an image side, 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 element L1 is a meniscus lens element having positive refractive power, and has a concave object-side surface S2 and a convex image-side surface S3. The second lens element L2 is a biconvex lens element with positive refractive power, and has a convex object-side surface S4 and a convex image-side surface S5. The third lens element L3 is a concave-convex lens element with negative refractive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 is a concave-convex lens element with negative refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 is a convex-concave lens element having positive refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The second lens L2 and the third lens L3 may be cemented to constitute a cemented lens.

Table 15 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 8. Table 16 shows cone coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 8, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 15

TABLE 16

In conclusion, examples 1 to 8 satisfy the relationships shown in the following tables 17-1 and 17-2, respectively. In tables 17-1 and 17-2, the units of F, ENPD, TTL, H, BFL, TL, D, R4, R5, sag7, sag8, sag9, sag10, F1, F2, F3, F4, F5, L are millimeters (mm) and the units of FOV are degrees (. Degree.).

TABLE 17-1

TABLE 17-2

The present application also provides an electronic device that may include the optical lens according to the above-described embodiment 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. In addition, the electronic device may also be a separate imaging device such as a vehicle-mounted camera, or may be an imaging module integrated on a system such as a driving assistance system.

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. The optical lens assembly, in order from an object side to an image side along an optical axis, comprises:

the image side surface of the first lens is a convex surface;

the second lens with positive focal power has a convex object-side surface and a convex image-side surface;

a third lens having a negative refractive power, the object-side surface of which is concave;

a fourth lens having a focal power, wherein the object-side surface of the fourth lens is a concave surface, and the image-side surface of the fourth lens is a convex surface; and

the fifth lens with positive focal power has a convex object-side surface and a concave image-side surface.

2. An optical lens barrel according to claim 1, wherein the object side surface of the first lens is convex.

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

4. An optical lens barrel according to claim 1, wherein the image side surface of the third lens element is convex.

5. An optical lens barrel according to claim 1, wherein the image side surface of the third lens is concave.

6. An optical lens according to claim 1, characterized in that the fourth lens has a positive or negative optical power.

7. An optical lens according to any one of claims 1-6, characterized in that the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F/ENPD is less than or equal to 1.48.

8. An optical lens according to any one of claims 1 to 6, wherein the total length TTL of the optical lens and the total effective focal length F of the optical lens satisfy: TTL/F is less than or equal to 4.5.

9. The optical lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first lens having a positive optical power;

a second lens having a positive optical power;

a third lens having a negative optical power;

a fourth lens having an optical power; and

a fifth lens having a positive optical power;

the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens meet the following conditions: F/ENPD is less than or equal to 1.48.

10. An electronic apparatus, characterized by comprising the optical lens according to any one of claims 1 to 9 and an imaging element for converting an optical image formed by the optical lens into an electric signal.