CN114509858A

CN114509858A - Optical lens, optical imaging apparatus, and vehicle

Info

Publication number: CN114509858A
Application number: CN202011282289.2A
Authority: CN
Inventors: 张俊明; 徐超; 杨佳
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2022-05-17

Abstract

The application provides an optical lens, an optical imaging apparatus and a vehicle. The optical lens sequentially includes, from an object side to an image side along an optical axis: a first lens having a negative focal power; a second lens having positive focal power, both the object-side surface and the image-side surface of which are convex surfaces; a third lens element having a concave object-side surface and a convex image-side surface; a fourth lens having a positive refractive power; and a fifth lens element having a positive refractive power, the object-side surface of which is convex and the image-side surface of which is concave. The optical lens has at least one beneficial effect of high resolution, small FNO, miniaturization, low cost, small front end caliber, good temperature performance and the like.

Description

Optical lens, optical imaging apparatus, and vehicle

Technical Field

The present application relates to the field of optical lenses, and in particular, to an optical lens including five lenses, an optical imaging apparatus including the optical lens, and a vehicle including the optical imaging apparatus.

Background

In recent years, with the rapid development of automobile driving assistance systems, lenses are more and more widely applied to automobiles, and the requirement for miniaturization of the lenses is more and more prominent.

For some special-purpose lenses, a small relative aperture (FNO) is usually required to increase the amount of incoming light, and the number of lenses is usually increased to improve image quality. However, the larger the number of lenses, the larger the volume and weight of the lens, which is disadvantageous to the miniaturization of the lens and also causes the cost to increase.

In addition, some lenses for special applications may have poor image quality when subjected to harsh environments (e.g., large temperature differences).

The statements in the background section are merely prior art as they are known to the inventors and do not, of course, represent prior art in the field.

Disclosure of Invention

The main purpose of this application is to provide a miniaturized, little FNO's optical lens. The optical lens only uses five lenses, so that the cost is reduced, and the imaging quality is high.

According to a first aspect of the present application, there is provided such an optical lens. Along an optical axis from an object side to an image side, the optical lens sequentially includes: a first lens having a negative focal power; a second lens having positive focal power, both the object-side surface and the image-side surface of which are convex surfaces; a third lens element having a concave object-side surface and a convex image-side surface; a fourth lens having a positive refractive power; and a fifth lens element having a positive refractive power, the object-side surface of which is convex and the image-side surface of which is concave.

In some embodiments, the object side surface of the first lens is concave and the image side surface of the first lens is concave.

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

In some embodiments, the third lens has a positive optical power.

In some embodiments, the third lens has a negative optical power.

In some embodiments, the object-side surface of the fourth lens element is convex and the image-side surface of the fourth lens element is concave.

In some embodiments, the object-side surface of the fourth lens element is convex and the image-side surface of the fourth lens element is convex.

In some embodiments, the fifth lens is an aspheric lens.

In some embodiments, the entire set of focal length values F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F/ENPD is less than or equal to 1.4.

In some embodiments, the entire set of focal length values 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.

In some embodiments, an optical total length TTL of the optical lens and a whole set of focal length values F of the optical lens satisfy: TTL/F is less than or equal to 7.

In some embodiments, an optical total length TTL of the optical lens and a whole set of focal length values F of the optical lens satisfy: TTL/F is less than or equal to 5.

In some embodiments, an optical total length TTL of the optical lens, an image height H corresponding to a maximum field angle of the optical lens, and a maximum field angle FOV of the optical lens satisfy: TTL/H/FOV is less than or equal to 0.1.

In some embodiments, an optical total length TTL of the optical lens, an image height H corresponding to a maximum field angle of the optical lens, and a maximum field angle FOV of the optical lens satisfy: TTL/H/FOV is less than or equal to 0.065.

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

In some embodiments, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the maximum field angle FOV of the optical lens satisfy: D/H/FOV is less than or equal to 0.05.

In some embodiments, an optical back focus BFL of the optical lens and an optical total length TTL of the optical lens satisfy: BFL/TTL is more than or equal to 0.05.

In some embodiments, an optical back focus BFL of the optical lens and an optical total length TTL of the optical lens satisfy: BFL/TTL is more than or equal to 0.08.

In some embodiments, the radius of curvature of the object-side surface of the third lens, R6, the radius of curvature of the image-side surface of the third lens, R7, and the thickness of the third lens, d6, satisfy: the absolute R7/(| R6| + d6) | is less than or equal to 1.5 and is more than or equal to 0.5.

In some embodiments, the radius of curvature of the object-side surface of the third lens, R6, the radius of curvature of the image-side surface of the third lens, R7, and the thickness of the third lens, d6, satisfy: the absolute R7/(| R6| + d6) | is less than or equal to 0.7 and less than or equal to 1.2.

In some embodiments, a rise Sag S3 corresponding to the maximum clear aperture of the object-side surface of the second lens and a rise Sag S4 corresponding to the maximum clear aperture of the image-side surface of the second lens satisfy: the | Sag S3|/| Sag S4| ≧ 1.2.

In some embodiments, a rise Sag S3 corresponding to the maximum clear aperture of the object-side surface of the second lens and a rise Sag S4 corresponding to the maximum clear aperture of the image-side surface of the second lens satisfy: the | Sag S3|/| Sag S4| ≧ 1.5.

In some embodiments, a rise Sag S10 corresponding to the maximum clear aperture of the object-side surface of the fifth lens and a rise Sag S11 corresponding to the maximum clear aperture of the image-side surface of the fifth lens satisfy: and the absolute value of Sag S10/absolute value of Sag S11 is more than or equal to 0.3 and less than or equal to 2.

In some embodiments, a rise Sag S10 corresponding to the maximum clear aperture of the object-side surface of the fifth lens and a rise Sag S11 corresponding to the maximum clear aperture of the image-side surface of the fifth lens satisfy: and the absolute value of Sag S10 absolute/absolute value of Sag S11 absolute value is more than or equal to 0.5 and less than or equal to 1.8.

In some embodiments, the focal length value F1 of the first lens and the entire set of focal length values F of the optical lens satisfy: the ratio of F1/F is less than or equal to 4.

In some embodiments, the focal length value F1 of the first lens and the entire set of focal length values F of the optical lens satisfy: the ratio of F1/F is less than or equal to 3.5.

In some embodiments, the focal length value of the first lens F1 and the focal length value of the second lens F2 satisfy: the absolute value of F1/F2 is more than or equal to 0.5 and less than or equal to 1.5.

In some embodiments, the focal length value of the first lens F1 and the focal length value of the second lens F2 satisfy: the absolute value of F1/F2 is more than or equal to 0.7 and less than or equal to 1.3.

In some embodiments, a focal length value F3 of the third lens and a focal length value F4 of the fourth lens satisfy: i F3I/F4 is more than or equal to 13.

In some embodiments, a focal length value F3 of the third lens and a focal length value F4 of the fourth lens satisfy: i F3/F4 is more than or equal to 15.

In some embodiments, the focal length value F2 of the second lens and the entire set of focal length values F of the optical lens satisfy: F2/F is more than or equal to 1.2 and less than or equal to 4.

In some embodiments, the focal length value F2 of the second lens and the entire set of focal length values F of the optical lens satisfy: F2/F is more than or equal to 1.7 and less than or equal to 3.5.

In some embodiments, a distance d9 between the center of the image side surface of the fourth lens and the center of the object side surface of the fifth lens and an optical total length TTL of the optical lens satisfy: d9/TTL is more than or equal to 0.01 and less than or equal to 0.5.

In some embodiments, a distance d9 between the center of the image side surface of the fourth lens and the center of the object side surface of the fifth lens and an optical total length TTL of the optical lens satisfy: d9/TTL is more than or equal to 0.03 and less than or equal to 0.3.

In some embodiments, the radius of curvature of the object side of the second lens, R3, and the radius of curvature of the image side of the second lens, R4, satisfy: (R3+ R4)/(R3-R4) is less than or equal to 0.

In some embodiments, the radius of curvature of the object side of the second lens, R3, and the radius of curvature of the image side of the second lens, R4, satisfy: (R3+ R4)/(R3-R4) is less than or equal to-0.1.

In some embodiments, a focal length value F5 of the fifth lens and a focal length value F of the entire group of the optical lenses satisfy: F5/F is more than or equal to 1.5.

In some embodiments, a focal length value F5 of the fifth lens and a focal length value F of the entire group of the optical lenses satisfy: F5/F is not less than 2.

According to a second aspect of the present application, another such optical lens is provided. Along an optical axis from an object side to an image side, the optical lens sequentially includes: a first lens having a negative focal power; a second lens having a positive refractive power; a third lens; a fourth lens having a positive refractive power; and a fifth lens having a positive refractive power; wherein the radius of curvature R6 of the object side surface of the third lens, the radius of curvature R7 of the image side surface of the third lens and the middle thickness d6 of the third lens satisfy: the absolute R7/(| R6| + d6) | is less than or equal to 1.5 and is more than or equal to 0.5.

In some embodiments, the object-side surface and the image-side surface of the second lens are both convex.

In some embodiments, the third lens has a positive optical power.

In some embodiments, the third lens has a negative optical power.

In some embodiments, the object-side surface of the third lens element is concave and the image-side surface of the third lens element is convex.

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

In some embodiments, the fifth lens is an aspheric lens.

According to a third aspect of the present application, there is provided an optical imaging apparatus. The optical imaging device comprises the optical lens and an imaging element for converting an optical image formed by the optical lens into an electric signal.

According to a fourth method of the present application, a vehicle is provided. The vehicle comprises a vehicle body and the optical imaging device mounted on the vehicle body.

This application sets up the lens shape through optimizing, and reasonable distribution focal power has reduced FNO, has increased the light inlet quantity. The length of the lens is reduced, the miniaturization of the lens is realized, the image resolving power is improved, and the assembly of a limited space in some special fields is facilitated. In addition, the thickness of each lens is reasonably distributed, so that the optical performance of the lens can be stable within-40-105 ℃. In conclusion, the optical lens has at least one of the advantages of high resolution, small FNO, miniaturization, low cost, small front end caliber, good temperature performance and the like.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings of the present application, like reference numerals refer to like elements.

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.

Wherein:

fig. 1 is a schematic structural diagram of an optical lens in embodiment 1 of the present application;

fig. 2 is a schematic structural diagram of an optical lens in embodiment 2 of the present application;

fig. 3 is a schematic structural diagram of an optical lens in embodiment 3 of the present application;

fig. 4 is a schematic structural diagram of an optical lens in embodiment 4 of the present application;

fig. 5 is a schematic structural diagram of an optical lens in embodiment 5 of the present application;

fig. 6 is a schematic structural diagram of an optical lens in embodiment 6 of the present application;

fig. 7 is a schematic structural diagram of an optical lens in embodiment 7 of the present application;

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

FIG. 9 is a schematic diagram of the rise of the object side of a lens according to the present application.

Detailed Description

The following detailed description of the present application, taken in conjunction with the accompanying drawings and examples, is provided to enable the aspects of the present application and its advantages to be better understood. However, the specific embodiments and examples described below are for illustrative purposes only and are not limiting of the present application.

It should be noted that the expressions first, second, third, etc. are only used to distinguish one feature from another, and do not represent any limitation of 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 this application, the expression "and/or" includes any and all combinations of one or more of the associated listed items. The terms "comprises," "comprising," "has," "having," "includes," and/or "including," when used in this application, 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. 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.

Moreover, 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.

In the present application, 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, and the surface of each lens closest to the image plane is called the image side surface.

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.

An optical lens according to an exemplary embodiment of the present application includes five lenses having optical powers, in order from an object side to an image side along an optical axis: the lens includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens.

Wherein the first lens has a negative focal power. The object side surface of the first lens element can be concave or convex, and the image side surface of the first lens element can be concave. The first lens of this application is favorable to collecting light, increases the luminous flux. When the first lens is arranged into a meniscus shape facing an object, the light entering the optical system can be prevented from being excessively dispersed, the rear caliber of the optical system can be controlled, and the miniaturization of the optical lens is realized; in addition, the object side surface of the first lens is arranged to be convex, so that water drops can slide off in practical use environments (such as rainy and snowy weather), and the influence of severe environments on imaging can be effectively reduced.

The second lens of the present application has a positive optical power. The object side surface and the image side surface of the second lens can be convex surfaces. The second lens is arranged to be biconvex, which is beneficial to compressing light and enabling the light to smoothly enter the rear optical system.

The third lens of the present application may have a positive power or a negative power. The object side surface can be concave, and the image side surface can be convex. The third lens is arranged to be in a meniscus shape facing the image side, so that light rays entering the optical system can be smoothly transited to the rear side.

The fourth lens of the present application has a positive optical power. The object side surface can be convex, and the image side surface can be concave or convex. The fourth lens is set to positive focal power, which is beneficial to compressing light and realizing small FNO.

The fifth lens of the present application has a positive optical power. The object side surface can be convex, and the image side surface can be concave. The fifth lens of this application can have long focal length, can gently transition the place ahead light to the rear, reduces the lens size, is favorable to improving optical properties such as relative illuminance, main light angle (CRA) when reducing the camera lens overall length. The fifth lens is set to be in a meniscus shape with positive focal power and towards the object space, and smooth transition of front light rays to a rear imaging focal plane is facilitated.

Optionally, the entire group of focal length values F of the optical lens of the present application and the entrance pupil diameter ENPD of the optical lens satisfy: F/ENPD is less than or equal to 1.4. More desirably, F/ENPD is ≦ 1. Thus, the FNO is favorable for small, and more incident light is collected.

Optionally, an optical total length TTL of the optical lens of the present application and a whole group focal length value F of the optical lens satisfy: TTL/F is less than or equal to 7. More desirably, TTL/F is ≦ 5. This arrangement can realize miniaturization of the optical lens.

Optionally, an optical total length TTL of the optical lens, an image height H corresponding to a maximum field angle of the optical lens, and a maximum field angle FOV of the optical lens satisfy: TTL/H/FOV is less than or equal to 0.1. More desirably, TTL/H/FOV is ≦ 0.065. The arrangement ensures that the total length of the lens group is shorter and the structure is compact, reduces the sensitivity of the lens to Modulation Transfer Function (MTF), improves the production yield and reduces the production cost.

Optionally, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the maximum field angle FOV of the optical lens satisfy: D/H/FOV is less than or equal to 0.1. More desirably, the D/H/FOV is ≦ 0.05. The arrangement is favorable for the small diameter of the front port of the optical lens and can realize miniaturization.

Optionally, an optical back focus BFL of the optical lens of the present application and an optical total length TTL of the optical lens satisfy: BFL/TTL is more than or equal to 0.05. More ideally, BFL/TTL is greater than or equal to 0.08. The arrangement can realize miniaturization, and the back focal length is longer, which is beneficial to the assembly of the optical lens.

Optionally, the focal length value F1 of the first lens and the focal length value F of the whole group of the optical lens satisfy: the ratio of F1/F is less than or equal to 4. More desirably, | F1/F | ≦ 3.5. In this way, the first lens has a short focal length, which is helpful for collecting light, so that light can enter the lens as much as possible, and the light inlet quantity is increased.

Optionally, a rise Sag S3 corresponding to the maximum clear aperture of the object-side surface of the second lens and a rise Sag S4 corresponding to the maximum clear aperture of the image-side surface of the second lens satisfy: the | Sag S3|/| Sag S4| ≧ 1.2. More preferably, | Sag S3|/| Sag S4| ≧ 1.5. This arrangement may facilitate the second lens to diverge the light into the rear optical system.

Optionally, the focal length value F1 of the first lens and the focal length value F2 of the second lens satisfy: the absolute value of F1/F2 is more than or equal to 0.5 and less than or equal to 1.5. More desirably, 0.7. ltoreq. F1/F2. ltoreq.1.3. The focal lengths of the first lens and the second lens are close, so that light rays are smoothly transited, and the resolution quality is improved.

Optionally, the focal length value F2 of the second lens and the focal length value F of the whole group of the optical lens satisfy: F2/F is more than or equal to 1.2 and less than or equal to 4. More preferably, 1.7. ltoreq. F2/F. ltoreq.3.5. The arrangement can control the light trend between the first lens and the third lens, so that the light is smoothly transited to the rear part, the system sensitivity is favorably reduced, the resolution quality is improved, and meanwhile, the lens is compact in structure and is favorable for miniaturization.

Optionally, a radius of curvature R3 of the object-side surface of the second lens and a radius of curvature R4 of the image-side surface thereof satisfy: (R3+ R4)/(R3-R4) is less than or equal to 0. More desirably, (R3+ R4)/(R3-R4). ltoreq.0.1. By the arrangement, the rise difference between the object side surface and the image side surface of the second lens is large, so that light rays can be favorably diffused to enter a rear optical system.

Optionally, the radius of curvature R6 of the object-side surface of the third lens, the radius of curvature R7 of the image-side surface of the third lens, and the middle thickness d6 of the third lens satisfy: the absolute R7/(| R6| + d6) | is less than or equal to 1.5 and is more than or equal to 0.5. More preferably, 0.7 ≦ R7/(| R6| + d6) | ≦ 1.2. By the arrangement, the object side surface and the image side surface of the third lens are close to the shape of a concentric circle, large-angle light rays can be collected conveniently, the light rays can be smoothly transited to a rear optical system, the aperture of the front end of the lens is reduced, the size is reduced, and the miniaturization and the cost reduction are facilitated.

Optionally, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfy: i F3I/F4 is more than or equal to 13. More desirably, | F3|/F4 ≧ 15. Thus, the focal length difference between the third lens and the fourth lens is large, light compression is facilitated, and small FNO is achieved.

Optionally, the fifth lens is an aspheric lens. 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. Aspheric lenses have a continuous change in curvature from the center of the lens to the periphery. 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 the 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 fifth lens is set to be an aspheric lens, so that the resolving power can be improved, the aberration can be eliminated, the total length can be reduced, and the sensitivity can be reduced. This application is through using single aspheric surface lens, effectively rectifies the aberration, improves the resolving power and the cost is reduced again, makes the whole compactness of optical lens simultaneously, satisfies the miniaturization, the equipment of being convenient for.

Optionally, a rise Sag S10 corresponding to the maximum clear aperture of the object-side surface of the fifth lens and a rise Sag S11 corresponding to the maximum clear aperture of the image-side surface of the fifth lens satisfy: and the absolute value of Sag S10/absolute value of Sag S11 is more than or equal to 0.3 and less than or equal to 2. More desirably, 0.5 ≦ Sag S10|/| Sag S11| ≦ 1.8. By the arrangement, the shape of the object side surface and the shape of the image side surface of the fifth lens are close to each other, peripheral light rays are smoothly transited, and the reduction of the sensitivity of the lens is facilitated.

Optionally, the focal length value F5 of the fifth lens and the focal length value F of the whole group of the optical lens satisfy: F5/F is more than or equal to 1.5. More preferably, F5/F.gtoreq.2. The fifth lens is set to be in a long focus, so that optical performances such as relative illumination and CRA (crazing-first) can be improved.

Optionally, a distance d9 between the center of the image-side surface of the fourth lens and the center of the object-side surface of the fifth lens and the total optical length TTL of the optical lens satisfy: d9/TTL is more than or equal to 0.01 and less than or equal to 0.5. More desirably, 0.03. ltoreq. d 9/TTL. ltoreq.0.3. Set up like this, the reasonable setting of interval between fourth lens and the fifth lens is favorable to the gentle transition of light, when realizing little FNO, can improve the resolution quality.

In this application, still can set up the diaphragm that is used for restricting the light beam between second lens and third lens to realize little FNO, increase the light inlet quantity, light before the compression, shorten optical system's overall length, reduce the bore of lens before and after. It should be specifically noted that the positions of the diaphragms disclosed herein are merely examples and are not limited, and in other embodiments of the present application, the diaphragms may be disposed at other positions according to actual needs.

In this application, 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.

The optical lens according to the above-described embodiment of the present application achieves at least one advantageous effect of an optical system having high resolution, small FNO, miniaturization, low cost, and good imaging quality at high and low temperatures, by reasonable setting of each lens shape and power, in the case of using only 5 lenses. Meanwhile, the optical system also meets the requirements of small lens size, small front end caliber, low sensitivity and high production yield. The FNO of the optical lens is small, and the light entering amount of the optical system is increased. Meanwhile, the optical lens also has better temperature performance, is favorable for less change of the imaging effect of the optical lens in high and low temperature environments, has stable image quality, can be used in most environments, and can greatly improve the safety of automatic driving.

In the present application, the first lens to the fifth lens in the optical lens may be all made of glass. 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. Specifically, when the importance is paid to the resolution quality and the reliability, the first lens to the sixth lens may be all glass aspherical lenses. Of course, in the application where the requirement of temperature stability is low, the first lens to the sixth lens in the optical lens can also be made of plastic or a combination of glass and plastic. The optical lens is made of plastic, so that the manufacturing cost can be effectively reduced.

It will be understood 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 this 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.

In particular, in the present application, the total optical length TTL of the optical lens is an on-axis distance from the center of the object-side surface of the first lens element to the center of the image plane, the optical back focus BFL of the optical lens is an on-axis distance from the center of the image-side surface of the fifth lens element of the last lens element to the center of the image plane, and the middle thickness d6 of the third lens element is an on-axis distance from the center of the object-side surface of the third lens element to the center of the image-side surface.

In particular, fig. 9 shows a schematic diagram of the saggital height SAG of the object side S of the lens L of the present application. The sagittal height 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 present application further provides an optical imaging apparatus including the above optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The imaging element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a range finding camera or may be an imaging module integrated on a device such as a range finding device.

The application also provides a vehicle which comprises a vehicle body and the optical imaging device mounted on the vehicle body.

The optical lens of the present application is described in detail below with reference to specific embodiments.

Example 1

Fig. 1 shows an optical lens according to embodiment 1 of the present application. In fig. 1, the optical lens includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5.

The first lens L1 is a biconcave lens with negative power, and both the object-side surface S1 and the image-side surface S2 are concave. The second lens L2 is a biconvex lens with positive optical power, and has both the object-side surface S3 and the image-side surface S4 being convex. The third lens element L3 is a meniscus lens element with negative power, with the object side S6 being concave and the image side S7 being convex. The fourth lens element L4 is a biconvex lens element with positive refractive 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 image-side surface S4 of the second lens L2 and the object-side surface S6 of the third lens L3. In this embodiment, the fifth lens L5 is an aspheric lens.

Optionally, the optical lens may further include a filter L6 (not shown) having an object side surface and an image side surface. The filter L6 can be used to correct color deviations. The optical lens may further include a protective glass L7 (not shown) having an object side surface and an image side surface. The protective glass L7 may be used to protect the image sensing chip IMA located at the imaging plane S12. Light from the object passes through each of the surfaces S1 to S11 in sequence and is finally imaged on the imaging plane IMA.

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 d2 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

Flour mark	R/mm	d/mm	Nd	Vd
					S1	-49.791	1.826	1.517	64.198
S2	12.368	3.195	/	/
					S3	23.597	6.511	1.804	46.568
S4	-60.960	0.121	/	/
					STO	All-round	3.501	/	/
S6	-12.344	5.342	1.804	46.568
					S7	-14.759	0.000	/	/
S8	20.766	8.565	1.804	46.568
					S9	-217.263	3.848	/	/
S10	16.168	7.337	1.589	61.251
					S11	30.877	5.759	/	/
IMO	All-round	/	/	/

In embodiment 1, both the object-side surface S10 and the image-side surface S11 of the fifth lens L5 may be aspheric, and the surface shape x of each aspheric lens may be defined using, but 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 being 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 aspherical surface. The cone coefficients k and the higher-order term coefficients a4, a6, A8, a10, a12 that can be used for the aspherical mirrors S10 and S11 in example 1 are given in table 2 below.

TABLE 2

Flour mark

K

A4

A6

A8

A10

A12

S10

-1.723

2.195E-05

-4.322E-07

5.014E-09

-1.321E-10

2.693E-13

S11

-21.345

6.132E-04

-2.508E-05

8.976E-07

-1.580E-08

1.025E-10

Wherein E represents scientific notation, such as 2.195E-05 representing 2.195 × 10^-5。

Table 17 shows the entire group focal length value F of the optical lens of example 1, the entrance pupil diameter ENPD of the optical lens, the total optical length TTL of the optical lens, the maximum field angle FOV of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, the optical back focus BFL of the optical lens, the maximum clear aperture D of the object-side surface of the first lens L1 corresponding to the maximum field angle of the optical lens, the radius of curvature R3 of the object-side surface S3 of the second lens L2, the radius of curvature R4 of the image-side surface S4 of the second lens L2, the radius of curvature R6 of the object-side surface S6 of the third lens L3, the radius of curvature R7 of the image-side surface S7 of the third lens L3, the middle-thickness D6 of the third lens L3, the center of the image-side surface S9 of the fourth lens L4 to the center of the object-side surface S10 of the fifth lens L5, the distance D2 of the maximum clear aperture S3 corresponding to the maximum clear aperture S3 of the image-side surface S3 of the sasa 3 corresponding to the maximum field angle S3 of the second lens L935, A rise Sag S10 corresponding to the maximum clear aperture of the object-side surface S10 of the fifth lens L5, a rise Sag S11 corresponding to the maximum clear aperture of the image-side surface S11 of the fifth lens L5, a focal length value F1 of the first lens L1, a focal length value F2 of the second lens L2, a focal length value F3 of the third lens L3, a focal length value F4 of the fourth lens L4, and a focal length value F5 of the fifth lens L5.

A relationship between the entire group focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens, a relationship between the entire group focal length value F of the optical lens and the entire group focal length value F of the optical lens, an optical total length TTL of the optical lens, a relationship between the image height H corresponding to the maximum field angle of the optical lens and the maximum field angle FOV of the optical lens, a relationship between the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field angle of the optical lens, a relationship between the image height H corresponding to the maximum field angle of the optical lens and the maximum field angle FOV of the optical lens, a relationship between the optical back focus BFL of the optical lens and the optical total length TTL of the optical lens, a relationship between the curvature radius R6 of the object-side surface S6 of the third lens L3, a curvature radius R7 of the image-side surface S7 of the third lens L3 and the thickness D3 of the third lens L85l, a relationship between the maximum clear aperture F of the image-side surface S3 corresponding to the maximum field angle S84 of the image-side surface S6853 of the second lens L2, a maximum clear aperture S84 of the object-side surface S52 of the second lens A relationship between a sagittal height Sag S4 corresponding to the through-light aperture, a relationship between a sagittal height Sag S10 corresponding to the maximum through-light aperture of the object-side surface S10 of the fifth lens L5 and a sagittal height Sag S11 corresponding to the maximum through-light aperture of the image-side surface S11 of the fifth lens L5, a relationship between a focal length value F11 of the first lens L11 and a full set of focal lengths F of the optical lenses, a relationship between a focal length value F11 of the first lens L11 and a focal length value F11 of the second lens L11, a relationship between a focal length value F11 of the third lens L11 and a focal length value F11 of the fourth lens L11, a relationship between a focal length value F11 of the second lens L11 and a full set of focal lengths F of the optical lenses, a relationship between a center of the image-side surface S11 of the fourth lens L11 to a center of the object-side surface S11 of the fifth lens L11, a relationship between a focal length F11 of the focal length of the optical lenses F11 and a focal length F11 of the second lens L11, a focal length of the second lens L11 and a focal length of the second lens L11, a focal length of the second lens L11 and a focal length of the second lens L11 of the focal length of the second lens L11, a focal length of the second lens L11, and a focal length of the second lens L11 of the focal length of the second lens L11, a focal length of the second lens 11 of the focal length of the second lens L11, a focal length of the second lens L11 of the focal length of the second lens L11, and a focal length of the second lens L11 of the focal length F11 of the focal length of the second lens L11 of the focal length F11 of the second lens L11 of the focal length of the second lens L11, and the second lens L11 of the focal length of the second lens L11 The relationship between the entire set of focal length values F is shown in table 17.

Example 2

Fig. 2 shows an optical lens according to embodiment 2 of the present application. In fig. 2, the optical lens includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5.

The optical lens may further include a stop STO between the image-side surface S4 of the second lens L2 and the object-side surface S6 of the third lens L3. In this embodiment, the fifth lens L5 is an aspheric lens.

Optionally, the optical lens may further include a filter L6 (not shown) having an object side surface and an image side surface. The filter L6 can be used to correct color deviations. The optical lens may further include a protective glass L7 (not shown) having an object side surface and an image side surface. The protective glass L7 may be used to protect the image sensing chip IMA located at the imaging plane S12. Light from the object passes through each surface S1 to S11 in sequence and is ultimately imaged onto an imaging plane IMA.

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 3

Flour mark	R/mm	d/mm	Nd	Vd
					S1	-49.967	1.826	1.517	64.198
S2	12.381	3.195	/	/
					S3	23.601	6.511	1.804	46.568
S4	-61.297	0.121	/	/
					STO	All-round	3.501	/	/
S6	-12.333	5.342	1.804	46.568
					S7	-14.753	0.000	/	/
S8	20.763	8.565	1.804	46.568
					S9	-215.413	3.844	/	/
S10	16.162	7.341	1.589	61.251
					S11	30.779	5.758	/	/
IMO	All-round	/	/	/

Table 4 shows the cone coefficients k and the high-order term coefficients A4, A6, A8, A10, A12 which can be used for the aspherical mirrors S10 and S11 in example 2.

TABLE 4

Flour mark

K

A4

A6

A8

A10

A12

S10

-1.726

2.195E-05

-4.322E-07

5.014E-09

-1.321E-10

2.693E-13

S11

-21.410

6.132E-04

-2.508E-05

8.976E-07

-1.580E-08

1.025E-10

The parameters of the optical lens in example 2 are shown in table 17.

Example 3

Fig. 3 shows an optical lens according to embodiment 3 of the present application. In fig. 3, the optical lens includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5.

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

Optionally, the optical lens may further include a filter L6 (not shown) having an object side surface and an image side surface. The filter L6 can be used to correct color deviations. The optical lens may further include a cover glass L7 (not shown) having an object side surface and an image side surface. The protective glass L7 may be used to protect the image sensing chip IMA located at the imaging plane S12. Light from the object passes through each of the surfaces S1 to S11 in sequence and is finally imaged on the imaging plane IMA.

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 5

Table 6 shows the cone coefficients k and the high-order term coefficients A4, A6, A8, A10, A12 which can be used for the aspherical mirrors S10 and S11 in example 3.

TABLE 6

Flour mark

K

A4

A6

A8

A10

A12

S10

-3.563

4.823E-05

4.455E-07

-5.363E-08

6.538E-10

-4.356E-12

S11

-4.090

4.758E-04

-1.260E-05

4.363E-07

-8.089E-09

5.587E-11

The parameters of the optical lens in example 3 are shown in table 17.

Example 4

Fig. 4 shows an optical lens according to embodiment 4 of the present application. In fig. 4, the optical lens includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5.

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 7

Table 8 shows the cone coefficients k and the high-order term coefficients A4, A6, A8, A10 and A12 which can be used for the aspherical mirrors S10 and S11 in example 4.

TABLE 8

Flour mark

K

A4

A6

A8

A10

A12

S10

-3.563

4.823E-05

4.455E-07

-5.363E-08

6.538E-10

-4.356E-12

S11

-4.090

4.758E-04

-1.260E-05

4.363E-07

-8.089E-09

5.587E-11

The parameters of the optical lens in example 4 are shown in table 17.

Example 5

Fig. 5 shows an optical lens according to embodiment 5 of the present application. In fig. 5, the optical lens includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5.

The first lens element L1 is a meniscus lens element with negative power, the object-side surface S1 is convex, and the image-side surface S2 is concave. The second lens L2 is a biconvex lens with positive optical power, and has both the object-side surface S3 and the image-side surface S4 being convex. The third lens L3 is a meniscus lens with positive power, with the object side S6 being concave and the image side S7 being convex. 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/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 5.

TABLE 9

Flour mark	R/mm	d/mm	Nd	Vd
					S1	100.000	1.826	1.517	64.198
S2	10.765	6.621	/	/
					S3	22.958	5.300	1.804	46.568
S4	-153.439	0.121	/	/
					STO	Infinity	3.501	/	/
S6	-13.728	5.342	1.804	46.568
					S7	-15.456	1.614	/	/
S8	15.629	8.565	1.804	46.568
					S9	84.826	3.602	/	/
S10	11.948	4.517	1.589	61.251
					S11	15.738	4.990	/	/
IMO	All-round	/	/	/

Table 10 shows the cone coefficients k and the high-order term coefficients A4, A6, A8, A10, A12 which can be used for the aspherical mirrors S10 and S11 in example 5.

Watch 10

Flour mark

K

A4

A6

A8

A10

A12

S10

-3.555

6.220E-05

-6.668E-08

-9.038E-08

5.797E-10

-2.277E-12

S11

-1.574

4.597E-04

-1.491E-05

4.910E-07

-1.092E-08

9.318E-11

The parameters of the optical lens in example 5 are shown in table 17.

Example 6

Fig. 6 shows an optical lens according to embodiment 6 of the present application. In fig. 6, the optical lens includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5.

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 11

Flour mark	R/mm	d/mm	Nd	Vd
					S1	100.000	1.826	1.517	64.198
S2	11.084	6.567	/	/
					S3	22.576	5.300	1.804	46.568
S4	-153.439	0.121	/	/
					STO	All-round	3.501	/	/
S6	-13.374	5.342	1.804	46.568
					S7	-15.213	2.149	/	/
S8	15.153	8.565	1.804	46.568
					S9	67.150	3.200	/	/
S10	11.807	4.445	1.589	61.251
					S11	16.050	4.985	/	/
IMO	All-round	/	/	/

Table 12 shows the cone coefficients k and the high-order term coefficients A4, A6, A8, A10, A12 which can be used for the aspherical mirrors S10 and S11 in example 6.

TABLE 12

Flour mark

K

A4

A6

A8

A10

A12

S10

-3.555

6.220E-05

-6.668E-08

-9.038E-08

5.797E-10

-2.277E-12

S11

-1.574

4.597E-04

-1.491E-05

4.910E-07

-1.092E-08

9.318E-11

Table 17 shows the relevant parameters of the optical lens in example 6.

Example 7

Fig. 7 shows an optical lens according to embodiment 7 of the present application. In fig. 7, the optical lens includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5.

The first lens L1 is a biconcave lens with negative power, and both the object-side surface S1 and the image-side surface S2 are concave. The second lens L2 is a biconvex lens with positive optical power, and has both the object-side surface S3 and the image-side surface S4 being convex. The third lens L3 is a meniscus lens with positive power, with the object side S6 being concave and the image side S7 being convex. 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.

The optical lens may further include a stop STO between the image-side surface S4 of the second lens L2 and the object-side surface S6 of the third lens L3. In the present embodiment, the fifth lens element L5 is an aspheric lens element.

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 13 relevant parameters for each lens surface of example 7

Flour mark	R/mm	d/mm	Nd	Vd
					S1	-40.000	1.826	1.517	64.198
S2	13.394	3.287	/	/
					S3	21.160	6.000	1.804	46.568
S4	-66.476	0.121	/	/
					STO	All-round	3.501	/	/
S6	-14.077	6.677	1.804	46.568
					S7	-16.465	0.400	/	/
S8	16.199	6.325	1.804	46.568
					S9	34.437	4.389	/	/
S10	12.943	7.542	1.589	61.251
					S11	29.208	5.818	/	/
IMO	All-round	/	/	/

Table 14 shows the cone coefficients k and the high-order term coefficients A4, A6, A8, A10, A12 which can be used for the aspherical mirrors S10 and S11 in example 7.

TABLE 14

Flour mark

K

A4

A6

A8

A10

A12

S10

-1.347

3.520E-05

-1.319E-06

2.696E-08

-3.917E-10

1.080E-12

S11

10.160

3.264E-04

-1.082E-05

2.802E-07

-4.631E-09

2.693E-11

Table 17 shows the relevant parameters of the optical lens in example 7.

Example 8

Fig. 8 shows an optical lens according to embodiment 8 of the present application. In fig. 8, the optical lens includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5.

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.

Watch 15

Flour mark	R/mm	d/mm	Nd	Vd
					S1	-40.000	1.826	1.517	64.198
S2	13.349	3.340	/	/
					S3	21.201	6.000	1.804	46.568
S4	-76.055	0.121	/	/
					STO	All-round	3.501	/	/
S6	-14.426	6.677	1.804	46.568
					S7	-16.792	0.400	/	/
S8	15.962	6.325	1.804	46.568
					S9	34.857	4.382	/	/
S10	13.026	7.542	1.589	61.251
					S11	29.065	5.911	/	/
IMO	All-round	/	/	/

Table 16 shows the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12 which can be used for the aspherical mirrors S10 and S11 in example 8.

TABLE 16

Flour mark

K

A4

A6

A8

A10

A12

S10

-1.280

3.689E-05

-1.478E-06

2.563E-08

-3.605E-10

9.009E-13

S11

10.041

3.370E-04

-1.096E-05

2.894E-07

-4.826E-09

2.824E-11

The parameters of the optical lens in example 8 are shown in table 17.

TABLE 17

It is to be understood that the above description is only of the preferred embodiments of the present application and is intended as an illustration 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. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications of this invention may be made without departing from the spirit or scope of the invention.

Claims

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

a first lens having a negative focal power;

a second lens having positive focal power, both the object-side surface and the image-side surface of which are convex surfaces;

a third lens element having a concave object-side surface and a convex image-side surface;

a fourth lens having a positive refractive power; and

the fifth lens has positive focal power, and the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface.

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

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

4. An optical lens according to claim 1, characterized in that the third lens has a positive optical power.

5. An optical lens as claimed in claim 1, characterized in that the third lens has a negative optical power.

6. 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.

7. 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.

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

a first lens having a negative focal power;

a second lens having a positive refractive power;

a third lens;

a fourth lens having a positive refractive power; and

a fifth lens having a positive refractive power;

wherein the radius of curvature R6 of the object side surface of the third lens, the radius of curvature R7 of the image side surface of the third lens and the middle thickness d6 of the third lens satisfy: the absolute R7/(| R6| + d6) | is less than or equal to 1.5 and is more than or equal to 0.5.

9. An optical imaging apparatus comprising the optical lens according to claim 1 or 8 and an imaging element for converting an optical image formed by the optical lens into an electric signal.

10. A vehicle, comprising:

a vehicle body; and

the optical imaging apparatus of claim 9, mounted on the vehicle body.