CN115561875A

CN115561875A - Optical lens and electronic device

Info

Publication number: CN115561875A
Application number: CN202110744979.3A
Authority: CN
Inventors: 姚波; 姚烨; 徐超
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2023-01-03

Abstract

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

Description

Optical lens and electronic device

Technical Field

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

Background

With the continuous development of optical lens technology, the application of optical lenses is more and more extensive, for example, optical lenses play an irreplaceable role in multiple fields such as smart phones, security monitoring, automobile auxiliary driving, intelligent detection and virtual reality. Meanwhile, lens manufacturers in various large fields are also actively invested in and dedicated to research and development of and improve the performance and technology of optical lenses in order to improve the quality and competitiveness of their own products.

Owing to the rapid development of automobile driving assistance systems in recent years, optical lenses are increasingly widely applied to automobiles, and the requirements on pixels of vehicle-mounted lenses are increasingly high. Meanwhile, with the continuous development of the automatic driving technology of automobiles, more and more companies begin to research the front-view lens with good identification degree for the traffic lights, and in order to accurately identify the traffic light signals, the optical lens needs to have higher chromatic aberration requirements. In addition, for safety reasons, the optical lens applied to the forward view also has very high performance requirements, and the existing common lens has the following problems in use: for example, ghost images are generated by reflection on the surface of the lens, so that a vehicle-mounted chip is easily induced to generate false alarm signals, an automobile driving assisting system makes wrong response, and driving safety is greatly influenced; moreover, the relative illumination of the common lens is low, the imaging is uneven, the light energy received by the edge area of the chip is low, and under the conditions of cloudy days and the like, when the light energy is lower than the trigger threshold of the chip, the condition of false alarm omission is easy to occur, and the personal safety is threatened. Therefore, it is necessary to remove ghost images and to improve the relative illuminance of the optical lens. Further, the use environment and the placement position of the front-view lens are required to have two slightly conflicting performances of miniaturization and high resolution.

Therefore, an optical lens with high resolution, miniaturization, low cost, good chromatic aberration, good performance and the like is needed in the market at present, and can meet the requirement of automobile forward-looking application.

Disclosure of Invention

The application provides an optical lens, this optical lens includes by first side to second side order along the optical axis: the first lens with negative focal power has a concave first side surface and a concave second side surface; a second lens having positive focal power, a first side surface of which is a convex surface; a third lens with positive focal power, wherein the first side surface of the third lens is a convex surface, and the second side surface of the third lens is a convex surface; a fourth lens with positive focal power, wherein the first side surface of the fourth lens is a convex surface; a fifth lens with negative focal power, wherein the second side surface of the fifth lens is a concave surface; a sixth lens having a refractive power, a first side surface of which is convex and a second side surface of which is concave; and a seventh lens having a negative power, a second side surface of which is concave.

In one embodiment, the second side of the second lens is concave.

In one embodiment, the second side of the second lens is convex.

In one embodiment, the second side of the fourth lens is concave.

In one embodiment, the second side of the fourth lens is convex.

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

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

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

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

In one embodiment, the second lens has an aspherical mirror surface.

In one embodiment, the seventh lens has an aspherical mirror surface.

In one embodiment, the fourth lens, the fifth lens, and the sixth lens are cemented to form a cemented lens.

In one embodiment, the optical lens further includes a stop disposed between the second lens and the third lens.

In one embodiment, the seventh lens has at least one inflection point on the second side.

In one embodiment, a distance TTL between a center of the first side surface of the first lens element and an imaging surface of the optical lens on the optical axis and a total effective focal length F of the optical lens satisfy: TTL/F is less than or equal to 2.5.

In one embodiment, the abbe number Vd3 of the third lens and the abbe number Vd4 of the fourth lens satisfy: vd3+ Vd4 is more than or equal to 100.

In one embodiment, the SAGs 61 at the maximum clear aperture of the first side of the sixth lens, the maximum clear full aperture D61 of the first side of the sixth lens, the SAGs 62 at the maximum clear aperture of the second side of the sixth lens, and the maximum clear full aperture D62 of the second side of the sixth lens satisfy: (SAG 61/D61)/(SAG 62/D62) is not more than 0.2 and not more than 2.5.

In one embodiment, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens satisfy: the ratio of F4/F5 is less than or equal to 2.5.

In one embodiment, a center thickness d4 of the fourth lens on the optical axis, a center thickness d5 of the fifth lens on the optical axis, a center thickness d6 of the sixth lens on the optical axis, and a distance TTL between a center of the first side surface of the first lens and an imaging surface of the optical lens on the optical axis satisfy: (d 4+ d5+ d 6)/TTL is more than or equal to 0.1 and less than or equal to 0.8.

In one embodiment, a distance BFL between a center of the second side surface of the seventh lens and the imaging plane of the optical lens on the optical axis and a distance TTL between a center of the first side surface of the first lens and the imaging plane of the optical lens on the optical axis satisfy: BFL/TTL is more than or equal to 0.05.

In one embodiment, the radius of curvature R6 of the first side surface of the third lens and the radius of curvature R7 of the second side surface of the third lens satisfy: the ratio of R6/R7 is less than or equal to 1.3.

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 satisfy: (FOV × F)/H.gtoreq.45.

In one embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: F/EPD is more than or equal to 1 and less than or equal to 2.

In one embodiment, a maximum clear aperture D of the first side surface of the first lens corresponding to a maximum angle of view of the optical lens, an image height H corresponding to the maximum angle of view of the optical lens, and an arc value θ corresponding to the maximum angle of view of the optical lens satisfy: D/H/theta is less than or equal to 5.

In one embodiment, a combined focal length F45 of the fourth lens and the fifth lens and a total effective focal length F of the optical lens satisfy: the ratio of F45/F is less than or equal to 12.

In one embodiment, a combined focal length F456 of the fourth, fifth, and sixth lenses and a total effective focal length F of the optical lens satisfy: and the | F456/F | is more than or equal to 2.

In one embodiment, a distance Ti10 from a center of the first side surface of the sixth lens element to the imaging surface of the optical lens on the optical axis and a distance TTL from the center of the first side surface of the first lens element to the imaging surface of the optical lens on the optical axis satisfy: ti10/TTL is more than or equal to 0.2 and less than or equal to 0.6.

In one embodiment, a center thickness d7 of the seventh lens on the optical axis and a distance TTL between a center of the first side surface of the first lens and an imaging surface of the optical lens on the optical axis satisfy: d7/TTL is more than or equal to 0.05 and less than or equal to 0.2.

In one embodiment, a distance d46 between the center of the second side surface of the fourth lens and the center of the first side surface of the sixth lens on the optical axis and a distance TTL between the center of the first side surface of the first lens and the imaging surface of the optical lens on the optical axis satisfy: d46/TTL is less than or equal to 0.05.

In one embodiment, an arc value θ 1 of an included angle between an incident ray and the optical axis before the chief ray at the center of the peripheral field of view of the optical lens reaches the sixth lens and an arc value θ 2 of an included angle between an emergent ray and the optical axis after the chief ray at the center of the peripheral field of view of the optical lens reaches the sixth lens satisfy: theta 2/theta 1 is less than or equal to 2.

In one embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy: the absolute value of F6/F is more than or equal to 2.1 and less than or equal to 10.

In one embodiment, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the refractive index N6 of the sixth lens satisfy: the ratio of (N6-N4)/(N5-N4) is more than or equal to 1 and less than or equal to 2.

In one embodiment, a center thickness d4 of the fourth lens on the optical axis, a center thickness d5 of the fifth lens on the optical axis, a center thickness d6 of the sixth lens on the optical axis, and a distance T from a center of the first side surface of the fourth lens to a center of the second side surface of the sixth lens on the optical axis satisfy: t is less than or equal to 0.03+ d4+ d5+ d6.

Another aspect of the present application provides an optical lens, which sequentially includes from a first side to a second side along an optical axis: a first lens having a negative optical power; a second lens having a positive optical power; a third lens having positive optical power; a fourth lens having positive optical power; a fifth lens having a negative optical power; a sixth lens having optical power; and a seventh lens having a negative power, wherein the fourth lens, the fifth lens, and the sixth lens are cemented to form a cemented lens.

In one embodiment, the first side of the first lens is concave and the second side is concave.

In one embodiment, the first side of the second lens is convex and the second side is concave.

In one embodiment, the first side of the second lens is convex and the second side is convex.

In one embodiment, the first side of the third lens is convex and the second side is convex.

In one embodiment, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a concave surface.

In one embodiment, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a convex surface.

In one embodiment, the first side of the fifth lens is convex and the second side is concave.

In one embodiment, the first side of the fifth lens is concave and the second side is concave.

In one embodiment, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a concave surface.

In one embodiment, the first side surface of the seventh lens is concave and the second side surface is concave.

In one embodiment, the first side surface of the seventh lens is a convex surface, and the second side surface of the seventh lens is a concave surface.

In one embodiment, the second lens has an aspherical mirror surface.

In one embodiment, the seventh lens has an aspherical mirror surface.

In one embodiment, the optical lens further comprises a diaphragm disposed between the second lens and the third lens.

In one embodiment, the second side of the seventh lens has at least one inflection point thereon.

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 satisfy: (FOV F)/H.gtoreq.45.

In one embodiment, an arc value θ 1 of an included angle between an incident ray and the optical axis before the central chief ray of the peripheral field of view of the optical lens reaches the sixth lens and an arc value θ 2 of an included angle between an emergent ray and the optical axis after the central chief ray of the peripheral field of view of the optical lens reaches the sixth lens satisfy: theta 2/theta 1 is less than or equal to 2.

In one embodiment, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the refractive index N6 of the sixth lens satisfy: 1 is more than or equal to (N6-N4)/(N5-N4) is more than or equal to 2.

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 used for converting an optical image formed by the optical lens into an electric signal.

The seven lenses are adopted, and the shapes, focal powers and the like of the lenses are optimally set, so that the optical lens has at least one beneficial effect of high resolution, miniaturization, high illumination, low cost, good chromatic aberration, good temperature performance, good back focal length, good imaging quality and the like, and the optical lens can better meet the requirements of vehicle-mounted forward-looking application.

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 structural view showing an optical lens according to embodiment 2 of the present application;

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

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

fig. 5 is a schematic view showing a structure of 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 structural view showing an optical lens according to embodiment 7 of the present application;

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

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

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

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

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

fig. 13 is a schematic diagram illustrating an arc value θ 1 of an angle between an incident ray and an optical axis before a central chief ray of an edge field of view of the optical lens reaches the sixth lens and an arc value θ 2 of an angle between an emergent ray and an optical axis after the central chief ray of the edge field of view of the optical lens reaches the sixth lens according to an embodiment of 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 side is called the image side surface of the lens.

It should be understood that the optical lens provided by the application can be used for shooting and projecting. When the optical lens provided by the present application is used for an imaging lens, the "first side" referred to herein may refer to an object side, and the "second side" may refer to an image side; when the optical lens provided herein is used in a projection lens or a radar emission lens, the "first side" referred to herein may refer to an image side, and the "second side" may refer to an image source side.

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

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

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the 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, seven lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The seven lenses are arranged in sequence from the first side to the second side along the optical axis.

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 negative optical power. The first lens may have a concave-concave type. The light can enter the rear optical system correctly and stably, the resolution can be improved, the light with a large view field can be collected as far as possible and enter the rear optical system, the light flux is increased, and the relative illumination is improved. The first lens can be a spherical lens, so that the processing cost can be reduced while the waterproof film can be coated.

In an exemplary embodiment, the second lens may have a positive optical power, facilitating light convergence. The second lens can be of a convex-concave surface type, which is beneficial to the processability of the lens, the caliber and the cylinder length of the optical lens cylinder are reduced, and the miniaturization of the optical lens is facilitated. Or the second lens can be of a convex surface type, so that peripheral light rays are smooth, the caliber and the cylinder length of the optical lens barrel are reduced, and the miniaturization of the optical lens is facilitated. Preferably, the second lens can have an aspheric mirror surface, so that aberration can be effectively corrected, resolution can be further improved, and the illumination of the image plane is more uniform.

In an exemplary embodiment, the third lens may have a positive optical power. The third lens may have a convex type. The arrangement of the focal power and the surface type of the third lens is beneficial to light convergence, and is beneficial to reducing the caliber and the cylinder length of the optical lens cylinder and the miniaturization of the optical lens.

In an exemplary embodiment, the fourth lens may have a positive optical power. The fourth lens may have a convex concave type or a convex type. The fourth lens has the focal power and the surface type, the dispersion coefficient is larger, the system dispersion can be corrected, the system aberration can be balanced, the convex and concave lenses can be processed, and the lens with the convex surface on the first surface can converge light easily to reduce the aperture.

In an exemplary embodiment, the fifth lens may have a negative power. The fifth lens may have a convex concave type or a concave type. The fifth lens can be made of a material with a higher refractive index, so that the structure is more compact, in addition, convex and concave lenses are beneficial to processability, and the lens with the convex first surface is easy to converge light, so that the aperture is reduced.

In an exemplary embodiment, the sixth lens may have a positive power or a negative power. The sixth lens may have a convex-concave type. The two surfaces of the sixth lens have approximate curvature radiuses, so that smooth transmission of light rays is facilitated, and the sensitivity of the system is reduced.

In an exemplary embodiment, the seventh lens may have a negative power. The seventh lens may have a concave-concave type or a convex-concave type. The arrangement of the focal power and the surface type of the seventh lens can balance the system aberration, is favorable for smoothing the trend of front rays and resolving images, and the convex-concave lens is favorable for processability. Preferably, the seventh lens can have an aspheric mirror surface, so that aberration can be effectively corrected, resolution can be further improved, and illuminance of an image plane is more uniform.

In an exemplary embodiment, the fourth lens, the fifth lens and the sixth lens can be cemented to form a cemented lens, so that the overall chromatic aberration correction of the system can be shared, the aberration can be effectively corrected to improve the image resolution, and the optical system can be made compact as a whole, which is beneficial to meeting the miniaturization requirement. In addition, the influence of the tolerance of a single product can be reduced through gluing, the overall performance is improved, meanwhile, the air cavity between the fifth lens and the sixth lens can be eliminated through gluing, light is prevented from being reflected back and forth between the air cavities, and the risk of ghost images can be effectively reduced.

In an exemplary embodiment, the optical lens may further include a diaphragm disposed between the second lens and the third lens, and the diaphragm disposed behind the second lens may help increase outgoing light and ensure the amount of transmitted light. In the embodiment of the present application, the diaphragm may be disposed in the vicinity of the second side surface of the second lens, or in the vicinity of the first side surface of the third lens, or in the vicinity of an intermediate position between the second lens and the third lens. It should be noted, however, that the locations of the diaphragms disclosed herein are merely examples and are not limiting; in alternative embodiments, the diaphragm may be disposed at other positions according to actual needs.

In an exemplary embodiment, the second side of the seventh lens element may have at least one inflection point thereon to facilitate correction of system aberrations and increase the system's resolving power.

In an exemplary embodiment, an optical lens according to the present application may satisfy: TTL/F is less than or equal to 2.5, wherein TTL is the total optical length of the optical lens, namely the distance between the center of the first side surface of the first lens and the imaging surface of the optical lens on the optical axis, 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 2.2. The TTL/F is less than or equal to 2.5, the size of the lens is limited, and the miniaturization of the lens is realized.

In an exemplary embodiment, an optical lens according to the present application may satisfy: vd3+ Vd4 is equal to or more than 100, wherein Vd3 is the Abbe number of the third lens, and Vd4 is the Abbe number of the fourth lens. More specifically, vd3 and Vd4 may further satisfy: vd3+ Vd4 is more than or equal to 120. The Vd3+ Vd4 is more than or equal to 100, which is beneficial to further limiting the deflection capability of the lens for emitting light rays to an object point so as to correct the chromatic aberration of the image taking lens and ensure that the image passing through the image taking lens is more real.

In an exemplary embodiment, an optical lens according to the present application may satisfy: 0.2 ≦ (SAG 61/D61)/(SAG 62/D62) ≦ 2.5, where SAG61 is the saggital height at the maximum clear aperture of the first side of the sixth lens, D61 is the maximum clear full aperture of the first side of the sixth lens, SAG62 is the saggital height at the maximum clear aperture of the second side of the sixth lens, and D62 is the maximum clear full aperture of the second side of the sixth lens. More specifically, SAG61, D61, SAG62, and D62 may further satisfy: (SAG 61/D61)/(SAG 62/D62) is not more than 0.5 and not more than 2. Satisfying 0.2 ≦ (SAG 61/D61)/(SAG 62/D62) ≦ 2.5, the first and second sides of the sixth lens may be shaped so as to facilitate a smooth transition of peripheral rays and to reduce lens sensitivity.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F4/F5| < 2.5, wherein F4 is the effective focal length of the fourth lens, and F5 is the effective focal length of the fifth lens. More specifically, F4 and F5 may further satisfy: the ratio of F4/F5 is less than or equal to 2. Satisfy | F4/F5| ≦ 2.5, the two lens focal lengths of veneer fourth lens and fifth lens are close, help the light to pass through smoothly, are favorable to correcting the colour difference, promote like the matter, and can effectively improve the thermal compensation of camera lens.

In an exemplary embodiment, an optical lens according to the present application may satisfy: 0.1 ≦ (d 4+ d5+ d 6)/TTL ≦ 0.8, where d4 is a center thickness of the fourth lens on the optical axis, d5 is a center thickness of the fifth lens on the optical axis, d6 is a center thickness of the sixth lens on the optical axis, and TTL is a distance on the optical axis from a center of the first side surface of the first lens to an image plane of the optical lens. More specifically, d4, d5, d6 and TTL may further satisfy: (d 4+ d5+ d 6)/TTL is more than or equal to 0.2 and less than or equal to 0.4. Satisfy (d 4+ d5+ d 6)/TTL that is more than or equal to 0.1 and is less than or equal to 0.8, the setting of reasonable veneer piece lens focus helps more light to steadily get into, is favorable to promoting the illuminance.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and the BFL/TTL is more than or equal to 0.05, wherein the BFL is the distance from the center of the second side surface of the seventh lens to the imaging surface of the optical lens on the optical axis, and the TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis. More specifically, BFL and TTL further satisfy: BFL/TTL is more than or equal to 0.1. The BFL/TTL is more than or equal to 0.05, so that the optical lens has the characteristic of back focal length and is beneficial to assembly.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and | R6/R7| < 1.3, wherein R6 is the radius of curvature of the first side surface of the third lens, and R7 is the radius of curvature of the second side surface of the third lens. More specifically, R6 and R7 may further satisfy: the ratio of R6 to R7 is less than or equal to 1.2. Satisfy | R6/R7| < 1.3, the lens symmetry is favorable to correcting the spherical aberration, improves the imaging quality to can conveniently assemble the equipment.

In an exemplary embodiment, an optical lens according to the present application may satisfy: (FOV multiplied by F)/H is more than or equal to 45, wherein FOV is the maximum angle of view 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 angle of view of the optical lens. More specifically, FOV, F and H further satisfy: (FOV F)/H.gtoreq.50. Satisfying (FOV multiplied by F)/H is more than or equal to 45, which is beneficial to realizing small distortion and simultaneously satisfying long focus and large field angle.

In an exemplary embodiment, an optical lens according to the present application may satisfy: F/EPD is less than or equal to 1 and less than or equal to 2, wherein F is the total effective focal length of the optical lens, and EPD is the entrance pupil diameter of the optical lens. More specifically, F and EPD may further satisfy: F/EPD is more than or equal to 1.5 and less than or equal to 1.8. F/EPD is more than or equal to 1 and less than or equal to 2, the entrance pupil diameter is large, and the relative illumination can be improved.

In an exemplary embodiment, an optical lens according to the present application may satisfy: D/H/theta is less than or equal to 5, wherein D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, and theta is the radian value corresponding to the maximum field angle of the optical lens. More specifically, D, H, and θ further satisfy: D/H/theta is less than or equal to 3. The requirement that D/H/theta is less than or equal to 5 is met, the diameter of the front end port of the lens can be small, and the miniaturization of the lens is facilitated.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F45/F | ≦ 12, wherein F45 is the combined focal length of the fourth lens and the fifth lens, and F is the total effective focal length of the optical lens. More specifically, F45 and F further satisfy: the ratio of F45/F is less than or equal to 10. Satisfy | F45/F | < 12, two pieces of lenses in front of the cemented piece, fourth lens and fifth lens gathered light promptly, can make the structure compacter, make follow-up light trend mild, be favorable to the miniaturization and the high resolution of camera lens.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F456/F | ≧ 2, wherein F456 is the combined focal length of the fourth lens, the fifth lens and the sixth lens, and F is the total effective focal length of the optical lens. More specifically, F456 and F further satisfy: and the | F456/F | is more than or equal to 2.5. The requirement that F456/F is more than or equal to 2 is met, the reasonable setting of the focal length of the lens of the gluing piece is beneficial to more light rays entering stably, and the illumination is favorably improved.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and Ti10/TTL is not less than 0.2 and not more than 0.6, wherein Ti10 is the distance between the center of the first side surface of the sixth lens element and the imaging surface of the optical lens on the optical axis, and TTL is the distance between the center of the first side surface of the first lens element and the imaging surface of the optical lens on the optical axis. More specifically, ti10 and TTL further may satisfy: ti10/TTL is more than or equal to 0.3 and less than or equal to 0.5. Ti10/TTL is more than or equal to 0.2 and less than or equal to 0.6, so that the sixth lens is far away from the image plane and ghost images can be eliminated.

In an exemplary embodiment, an optical lens according to the present application may satisfy: d7/TTL is more than or equal to 0.05 and less than or equal to 0.2, wherein d7 is the central thickness of the seventh lens on the optical axis, and TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis. More specifically, d7 and TTL further can satisfy: d7/TTL is more than or equal to 0.07 and less than or equal to 0.15. D7/TTL is more than or equal to 0.05 and less than or equal to 0.2, the thicker last lens (namely the seventh lens) can enable light to deflect smoothly, relative illumination is improved, the turning pressure of the third lens can be shared, the sensitivity and the weight of the third lens are relieved, aberration can be balanced, and resolution is improved.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and d46/TTL is less than or equal to 0.05, wherein d46 is the distance between the center of the second side surface of the fourth lens and the center of the first side surface of the sixth lens on the optical axis, and TTL is the distance between the center of the first side surface of the first lens and the imaging surface of the optical lens on the optical axis. More specifically, d46 and TTL further satisfy: d46/TTL is less than or equal to 0.04. The d46/TTL is less than or equal to 0.05, the distance between the fourth lens and the sixth lens is shortened, the ghost image problem caused by the fact that curvatures of two surfaces are close to each other is favorably reduced, air space can be reduced, and the size of the lens is reduced.

In an exemplary embodiment, an optical lens according to the present application may satisfy: theta 2/theta 1 is less than or equal to 2, wherein theta 1 is an arc value of an included angle between an incident ray and an optical axis before a central chief ray of an edge field of view of the optical lens reaches the sixth lens, and theta 2 is an arc value of an included angle between an emergent ray and an optical axis after the central chief ray of the edge field of view of the optical lens reaches the sixth lens. As shown in fig. 13, A1 in fig. 13 is a central chief ray of the optical lens peripheral field of view. More specifically, θ 1 and θ 2 may further satisfy: theta 2/theta 1 is less than or equal to 1.5. The requirement that theta 2/theta 1 is less than or equal to 2 is met, the light trend can be smooth, the light smooth transition is facilitated, the reduction of the lens sensitive items is facilitated, and the illumination is promoted.

In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F6/F | is more than or equal to 2.1 and less than or equal to 10, wherein F6 is the effective focal length of the sixth lens, and F is the total effective focal length of the optical lens. More specifically, F6 and F further satisfy: the absolute value of F6/F is more than or equal to 2.1 and less than or equal to 8. Satisfy 2.1 ≦ F6/F | ≦ 10, reasonable focal length distribution in the veneer can reduce light energy loss, is favorable to promoting the illuminance, corrects the aberration simultaneously, improves the solution.

In an exemplary embodiment, an optical lens according to the present application may satisfy: 1 is less than or equal to (N6-N4)/(N5-N4) is less than or equal to 2, wherein N4 is the refractive index of the fourth lens, N5 is the refractive index of the fifth lens, and N6 is the refractive index of the sixth lens. More specifically, N4, N5 and N6 may further satisfy: the ratio of (N6-N4)/(N5-N4) is more than or equal to 1 and less than or equal to 1.8. The (N6-N4)/(N5-N4) is more than or equal to 1 and less than or equal to 2, the refractive indexes of the fourth lens, the fifth lens and the sixth lens are close to each other, so that the light ray trend is smooth, the refractive index sensitivity of the lenses can be reduced, meanwhile, the aberration can be balanced, and the resolution is improved.

In an exemplary embodiment, an optical lens according to the present application may satisfy: t ≦ 0.03 ++ d4 ++ 5 ++ d6, wherein d4 is a central thickness of the fourth lens on an optical axis, d5 is a central thickness of the fifth lens on the optical axis, d6 is a central thickness of the sixth lens on the optical axis, and T is a distance from a center of the first side surface of the fourth lens to a center of the second side surface of the sixth lens on the optical axis. More specifically, d4, d5, d6 and T may further satisfy: t is less than or equal to 0.02+ d4+ d5+ d6.

In an exemplary embodiment, the optical lens of the present application may further include a filter and/or a cover glass disposed between the seventh lens and the image plane to filter light rays having different wavelengths and prevent a second side element (e.g., a chip) of the optical lens from being damaged, as needed.

In an exemplary embodiment, the first lens may be a spherical lens; the second lens may be an aspheric lens; the third lens, the fourth lens, the fifth lens and the sixth lens may be spherical lenses; the seventh lens may be an aspherical lens. The specific number of spherical lenses and aspherical lenses is not particularly limited in the present application, and the number of aspherical lenses may be increased when focusing on the resolution quality. 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, the fifth lens, the sixth lens, and the seventh 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 aspheric lens helps to correct system aberration and improve resolving power.

In an exemplary embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh 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 problems that the imaging blur of the lens is caused by high and low temperature changes in the use environment, the normal use of the lens is influenced and the like can be avoided. Specifically, when temperature performance and resolution quality are of major concern, the first lens to the seventh lens may all be glass aspherical lenses. In the application with lower requirement on temperature stability, the first lens to the seventh 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 seventh lens in the optical lens may also be made of plastic and glass in a matched manner.

According to the optical lens of the embodiment of the application, through reasonable setting of the shapes and the focal powers of all the lenses, the optical lens has at least one beneficial effect of high resolution, miniaturization, low cost, good chromatic aberration, long back focal length, good imaging quality and the like, so that the optical lens can better meet the requirements of vehicle-mounted forward-looking application. In particular, the optical lens according to the above-mentioned embodiment of the present application ensures the accuracy of receiving signals by the on-board chip by eliminating the additional ghost image generated by reflection on the lens surface in the form of the tri-cemented lens, and the tri-cemented lens form is easy to reduce the fitting sensitivity. In addition, through proper diaphragm position setting, large entrance pupil caliber selection, reasonable lens material collocation, focal power setting and the like, the vehicle-mounted chip can be well matched, so that the imaging is uniform, the relative illumination is high, and the phenomena of color cast and dark angle are avoided. In addition, by means of an aspheric lens, reasonable power setting and the like, the optical system only uses seven lenses to meet the requirements of miniaturization and high resolution. The imaging effect under high and low temperature can be changed little through the reasonable distribution of the system focal power, the image quality is stable, and the system is suitable for most environments of vehicles. And the lower tolerance sensitivity can reduce the processing and assembling difficulty and reduce the lens cost.

However, it will be appreciated by those skilled in the art that the number of lenses constituting the lens barrel may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although seven lenses are exemplified in the embodiment, the optical lens is not limited to include seven lenses. The optical lens may also include other numbers of lenses, if desired. Specific examples of an optical lens applicable to the above-described embodiments are further described below with reference to the drawings.

Example 1

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

As shown in fig. 1, the optical lens includes, in order from a first side to a second side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a concave-concave lens having negative refractive power, and the first side surface S1 is a concave surface and the second side surface S2 is a concave surface. The second lens L2 is a convex-concave lens having positive refractive power, and has a convex first side surface S3 and a concave second side surface S4. The third lens L3 is a convex lens with positive refractive power, and has a convex first side S6 and a convex second side S7. The fourth lens L4 is a convex-concave lens having positive refractive power, and has a convex first side surface S8 and a concave second side surface S9. The fifth lens L5 is a convex-concave lens having negative refractive power, and has a convex first side surface S9 and a concave second side surface S10. The sixth lens L6 is a convex-concave lens having positive refractive power, and has a convex first side surface S10 and a concave second side surface S11. The seventh lens L7 is a concave-concave lens having negative refractive power, and has a concave first side surface S12 and a concave second side surface S13.

The optical lens may further include a stop STO, and the stop STO may be disposed between the second lens L2 and the third lens L3 to increase the outgoing light and ensure the amount of light passing through. For example, the stop STO may be disposed between the second lens L2 and the third lens L3 at a position close to the second side surface S4 of the second lens L2.

Optionally, the optical lens may further include a filter L8 having a first side S14 and a second side S15, and the filter L8 may be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side S16 and a second side S17, and the protective glass L9 may be used to protect the image sensing chip IMA located at the image plane and/or the image source plane. When the optical lens is used for shooting, light from an object sequentially passes through the surfaces S1 to S17 and is finally imaged on an imaging surface; when the optical lens is used for projection, light from the image source plane passes through the surfaces S17 to S1 in sequence and is finally projected to a target object (not shown).

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 a center thickness d1 of the first lens L1, the thickness/distance d of the row in which S2 is located is a separation distance d2 between the first lens L1 and the second lens L2, and so on), a refractive index N, and an abbe number Vd of each lens of the optical lens of example 1.

TABLE 1

In embodiment 1, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S12 and the second side surface S13 of the seventh lens L7 may be aspheric, and the profile 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 reciprocal of the 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 conical coefficient k and the high-order term coefficients A4, A6, A8, a10, a12, a14, and a16 that can be used for each of the aspherical mirror surfaces S3, S4, S12, and S13 in example 1 are given in table 2 below.

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S3

-1.9883

-7.8123E-05

-4.2778E-06

-1.7038E-10

1.8096E-09

-8.7209E-12

-2.8868E-12

5.7061E-14

S4

-126.1065

5.1660E-05

-4.4125E-06

5.7603E-08

-1.4782E-09

9.8617E-11

-2.6412E-12

2.0821E-14

S12

111.7484

-2.1236E-03

4.6351E-06

-2.6601E-06

1.7262E-07

2.3326E-09

-4.2426E-10

7.1339E-12

S13

0.4386

-1.1904E-03

-9.9344E-06

4.8754E-06

-4.7095E-07

2.4134E-08

-5.2654E-10

2.7616E-12

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, a description of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 2 shows a schematic structural diagram of an optical lens according to embodiment 2 of the present application.

As shown in fig. 2, the optical lens includes, in order from a first side to a second side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a concave lens having negative refractive power, and has a concave first side surface S1 and a concave second side surface S2. The second lens L2 is a convex-concave lens having positive refractive power, and has a convex first side surface S3 and a concave second side surface S4. The third lens L3 is a convex lens with positive refractive power, and has a convex first side S6 and a convex second side S7. The fourth lens L4 is a convex-concave lens having positive refractive power, and has a convex first side surface S8 and a concave second side surface S9. The fifth lens L5 is a convex-concave lens having negative refractive power, and has a convex first side surface S9 and a concave second side surface S10. The sixth lens L6 is a convex-concave lens having positive refractive power, and has a convex first side surface S10 and a concave second side surface S11. The seventh lens L7 is a concave-concave lens having negative refractive power, and has a concave first side surface S12 and a concave second side surface S13.

Optionally, the optical lens may further include a filter L8 having a first side S14 and a second side S15, and the filter L8 may be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side S16 and a second side S17, and the protective glass L9 may be used to protect the image sensing chip IMA located at the image plane and/or the image source plane. When the optical lens is used for shooting, light from an object sequentially passes through the surfaces S1 to S17 and is finally imaged on an imaging surface; when the optical lens is used for projection, light from the image source plane passes through the respective surfaces S17 to S1 in order and is finally projected to a target object (not shown).

Table 3 shows the radius of curvature R, thickness/distance d, refractive index N, 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

A14

A16

S3

-2.1907

-8.0339E-05

-4.2526E-06

1.1678E-09

1.8612E-09

-7.1812E-12

-2.7891E-12

6.1277E-14

S4

-114.2484

5.3348E-05

-4.3750E-06

5.9617E-08

-1.3891E-09

1.0210E-10

-2.5134E-12

2.5355E-14

S12

111.7484

-1.9511E-03

1.1417E-05

-2.7185E-06

1.4740E-07

9.2394E-10

-4.5250E-10

1.1557E-11

S13

3.8345

-1.1148E-03

-9.1450E-06

4.8271E-06

-4.7667E-07

2.3900E-08

-5.2999E-10

2.9502E-12

TABLE 4

Example 3

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

As shown in fig. 3, the optical lens includes, in order from a first side to a second side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a concave lens having negative refractive power, and has a concave first side surface S1 and a concave second side surface S2. The second lens L2 is a convex-concave lens having positive refractive power, and has a convex first side surface S3 and a concave second side surface S4. The third lens L3 is a convex lens with positive refractive power, and has a convex first side S6 and a convex second side S7. The fourth lens L4 is a convex lens with positive refractive power, and has a convex first side surface S8 and a convex second side surface S9. The fifth lens L5 is a concave-concave lens having negative refractive power, and has a concave first side surface S9 and a concave second side surface S10. The sixth lens L6 is a convex-concave lens having positive refractive power, and has a convex first side surface S10 and a concave second side surface S11. The seventh lens L7 is a convex-concave lens having negative refractive power, and has a convex first side surface S12 and a concave second side surface S13.

Table 5 shows the radius of curvature R, thickness/distance d, refractive index N, 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

A14

A16

S3

-1.2503

-5.2305E-05

-3.6383E-06

1.0506E-08

1.1058E-09

-1.7647E-11

-1.8172E-12

4.2628E-14

S4

-19.4584

6.0849E-05

-5.0579E-06

1.0785E-07

-1.1556E-09

2.8820E-11

-5.5564E-12

9.5713E-14

S12

111.7484

-1.7463E-03

-2.3651E-06

-4.7823E-06

1.9787E-07

4.8069E-09

-9.0659E-10

2.0359E-11

S13

8.7661

-8.1164E-04

-5.0789E-05

6.4219E-06

-5.2170E-07

2.2554E-08

-4.0630E-10

1.2723E-12

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 a first side to a second side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The optical lens may further include a stop STO, and the stop STO may be disposed between the second lens L2 and the third lens L3 to increase the outgoing light and ensure the amount of transmitted light. For example, the stop STO may be disposed between the second lens L2 and the third lens L3 at a position close to the second side surface S4 of the second lens L2.

Table 7 shows the radius of curvature R, thickness/distance d, refractive index N, 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

A14

A16

S3

-1.1813

-5.0216E-05

-3.5999E-06

1.1111E-08

1.1125E-09

-1.7696E-11

-1.8265E-12

4.1969E-14

S4

-25.0730

5.9839E-05

-5.0378E-06

1.0997E-07

-1.0455E-09

3.3510E-11

-5.3830E-12

1.0101E-13

S12

111.7484

-1.7139E-03

-1.4895E-06

-4.7634E-06

1.9798E-07

4.7660E-09

-9.1351E-10

1.9392E-11

S13

8.8839

-8.0227E-04

-5.0540E-05

6.4224E-06

-5.2212E-07

2.2518E-08

-4.0837E-10

1.1992E-12

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 a first side to a second side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a concave-concave lens having negative refractive power, and the first side surface S1 is a concave surface and the second side surface S2 is a concave surface. The second lens L2 is a convex lens with positive refractive power, and has a convex first side surface S3 and a convex second side surface S4. The third lens L3 is a convex lens having positive refractive power, and has a convex first side surface S6 and a convex second side surface S7. The fourth lens L4 is a convex-concave lens having positive refractive power, and has a convex first side surface S8 and a concave second side surface S9. The fifth lens L5 is a convex-concave lens having negative refractive power, and has a convex first side surface S9 and a concave second side surface S10. The sixth lens L6 is a convex-concave lens having positive refractive power, and has a convex first side surface S10 and a concave second side surface S11. The seventh lens L7 is a concave-concave lens having negative refractive power, and has a concave first side surface S12 and a concave second side surface S13.

The optical lens may further include a stop STO, and the stop STO may be disposed between the second lens L2 and the third lens L3 to increase the outgoing light and ensure the amount of transmitted light. For example, the stop STO may be disposed at a position near the middle between the second lens L2 and the third lens L3.

Table 9 shows the radius of curvature R, thickness/distance d, refractive index N, 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

A14

A16

S3

-2.14E+01

-1.4330E-04

-6.2796E-06

9.1669E-08

-2.5156E-11

-6.3307E-11

6.2426E-13

3.6010E-14

S4

90.3151

-4.0975E-05

-3.5927E-06

1.3933E-07

-2.9167E-09

4.8797E-11

-8.5504E-13

2.4389E-14

S12

90.6595

-1.9270E-03

2.9788E-05

-6.1005E-06

3.0942E-07

9.8562E-09

-1.4336E-09

2.8091E-11

S13

9.4064

-1.1456E-03

-1.7175E-05

5.2293E-06

-5.1668E-07

2.5392E-08

-4.9374E-10

-6.3824E-13

Watch 10

Example 6

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

As shown in fig. 6, the optical lens includes, in order from a first side to a second side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a concave lens having negative refractive power, and has a concave first side surface S1 and a concave second side surface S2. The second lens L2 is a convex lens with positive refractive power, and has a convex first side S3 and a convex second side S4. The third lens L3 is a convex lens with positive refractive power, and has a convex first side S6 and a convex second side S7. The fourth lens L4 is a convex-concave lens having positive refractive power, and has a convex first side surface S8 and a concave second side surface S9. The fifth lens L5 is a convex-concave lens having negative refractive power, and has a convex first side surface S9 and a concave second side surface S10. The sixth lens L6 is a convex-concave lens having positive refractive power, and has a convex first side surface S10 and a concave second side surface S11. The seventh lens L7 is a concave-concave lens having negative refractive power, and has a concave first side surface S12 and a concave second side surface S13.

The optical lens may further include a stop STO, and the stop STO may be disposed between the second lens L2 and the third lens L3 to increase the outgoing light and ensure the amount of light passing through. For example, the stop STO may be disposed at a position near the middle between the second lens L2 and the third lens L3.

Table 11 shows the radius of curvature R, thickness/distance d, refractive index N, 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

A14

A16

S3

-5.7771

-1.2627E-04

-6.5743E-06

8.4729E-08

1.0802E-10

-5.2545E-11

7.7215E-13

1.7635E-14

S4

143.0531

-4.3451E-05

-2.8959E-06

1.5907E-07

-2.5967E-09

4.9007E-11

-1.1080E-12

9.3629E-15

S12

111.7484

-1.7822E-03

1.9339E-05

-6.3505E-06

3.1841E-07

1.1122E-08

-1.3752E-09

2.5376E-11

S13

8.9881

-1.2525E-03

-1.0655E-05

5.0871E-06

-5.3065E-07

2.4910E-08

-4.8680E-10

2.1057E-12

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 includes, in order from a first side to a second side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a concave lens having negative refractive power, and has a concave first side surface S1 and a concave second side surface S2. The second lens L2 is a convex lens with positive refractive power, and has a convex first side surface S3 and a convex second side surface S4. The third lens L3 is a convex lens having positive refractive power, and has a convex first side surface S6 and a convex second side surface S7. The fourth lens L4 is a convex lens with positive refractive power, and has a convex first side surface S8 and a convex second side surface S9. The fifth lens L5 is a concave-concave lens having negative refractive power, and has a concave first side surface S9 and a concave second side surface S10. The sixth lens L6 is a convex-concave lens having negative refractive power, and has a convex first side surface S10 and a concave second side surface S11. The seventh lens L7 is a concave-concave lens having negative refractive power, and has a concave first side surface S12 and a concave second side surface S13.

Table 13 shows the radius of curvature R, thickness/distance d, refractive index N, and abbe number Vd of each lens of the optical lens of example 7. Table 14 shows cone 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

A14

A16

S3

-44.8893

-1.5794E-04

-2.3734E-06

1.4243E-07

-2.4197E-09

-2.1340E-10

-1.8971E-12

2.5803E-13

S4

85.0915

2.1366E-05

-6.0288E-06

1.0343E-07

-2.2060E-09

1.2274E-10

1.4285E-12

-8.9050E-14

S12

111.7484

-2.4503E-03

4.1702E-05

-6.5126E-06

3.0800E-07

9.6824E-09

-1.5437E-09

4.5133E-11

S13

7.6602

-1.4217E-03

-2.6528E-05

5.9593E-06

-5.0747E-07

2.5369E-08

-4.9914E-10

-2.2879E-12

TABLE 14

Example 8

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

As shown in fig. 8, the optical lens includes, in order from a first side to a second side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a concave lens having negative refractive power, and has a concave first side surface S1 and a concave second side surface S2. The second lens L2 is a convex lens with positive refractive power, and has a convex first side S3 and a convex second side S4. The third lens L3 is a convex lens with positive refractive power, and has a convex first side S6 and a convex second side S7. The fourth lens L4 is a convex lens with positive refractive power, and has a convex first side surface S8 and a convex second side surface S9. The fifth lens L5 is a concave-concave lens having negative refractive power, and has a concave first side surface S9 and a concave second side surface S10. The sixth lens L6 is a convex-concave lens having negative refractive power, and has a convex first side surface S10 and a concave second side surface S11. The seventh lens L7 is a concave-concave lens having negative refractive power, and has a concave first side surface S12 and a concave second side surface S13.

Table 15 shows the radius of curvature R, thickness/distance d, refractive index N, and abbe number Vd of each lens of the optical lens of example 8. Table 16 shows conic 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

Example 9

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

As shown in fig. 9, the optical lens includes, in order from a first side to a second side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a concave lens having negative refractive power, and has a concave first side surface S1 and a concave second side surface S2. The second lens L2 is a convex-concave lens having positive refractive power, and has a convex first side surface S3 and a concave second side surface S4. The third lens L3 is a convex lens having positive refractive power, and has a convex first side surface S6 and a convex second side surface S7. The fourth lens L4 is a convex-concave lens having positive refractive power, and has a convex first side surface S8 and a concave second side surface S9. The fifth lens L5 is a convex-concave lens having negative refractive power, and has a convex first side surface S10 and a concave second side surface S11. The sixth lens L6 is a convex-concave lens having positive refractive power, and has a convex first side surface S12 and a concave second side surface S13. The seventh lens L7 is a concave-concave lens having negative refractive power, and has a concave first side surface S14 and a concave second side surface S15.

Optionally, the optical lens may further include a filter L8 having a first side S16 and a second side S17, and the filter L8 may be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side S18 and a second side S19, and the protective glass L9 may be used to protect the image sensing chip IMA located at the image plane and/or the image source plane. When the optical lens is used for shooting, light from an object sequentially passes through the surfaces S1 to S19 and is finally imaged on an imaging surface; when the optical lens is used for projection, light from the image source plane passes through the surfaces S19 to S1 in sequence and is finally projected to a target object (not shown).

Table 17 shows the radius of curvature R, thickness/distance d, refractive index N, and abbe number Vd of each lens of the optical lens of example 9. Table 18 shows cone coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 9, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 17

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S3

-2.1907

-8.0339E-05

-4.2526E-06

1.1678E-09

1.8612E-09

-7.1812E-12

-2.7891E-12

6.1277E-14

S4

-112.5630

5.3348E-05

-4.3750E-06

5.9617E-08

-1.3891E-09

1.0210E-10

-2.5134E-12

2.5355E-14

S14

111.7484

-1.9511E-03

1.1417E-05

-2.7185E-06

1.4740E-07

9.2394E-10

-4.5250E-10

1.1557E-11

S15

3.8345

-1.1148E-03

-9.1450E-06

4.8271E-06

-4.7667E-07

2.3900E-08

-5.2999E-10

2.9502E-12

Watch 18

Example 10

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

As shown in fig. 10, the optical lens includes, in order from a first side to a second side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a concave lens having negative refractive power, and has a concave first side surface S1 and a concave second side surface S2. The second lens L2 is a convex-concave lens having positive refractive power, and has a convex first side surface S3 and a concave second side surface S4. The third lens L3 is a convex lens with positive refractive power, and has a convex first side S6 and a convex second side S7. The fourth lens L4 is a convex lens with positive refractive power, and has a convex first side surface S8 and a convex second side surface S9. The fifth lens L5 is a concave-concave lens having negative refractive power, and has a concave first side surface S10 and a concave second side surface S11. The sixth lens L6 is a convex-concave lens having positive refractive power, and has a convex first side surface S12 and a concave second side surface S13. The seventh lens L7 is a convex-concave lens having negative refractive power, and has a convex first side surface S14 and a concave second side surface S15.

Optionally, the optical lens may further include a filter L8 having a first side S16 and a second side S17, and the filter L8 may be used to correct color deviation. Optionally, the optical lens may further include a protective glass L9 having a first side S18 and a second side S19, and the protective glass L9 may be used to protect the image sensing chip IMA located at the image plane and/or the image source plane. When the optical lens is used for shooting, light from an object sequentially passes through the surfaces S1 to S19 and is finally imaged on an imaging surface; when the optical lens is used for projection, light from the image source plane passes through the respective surfaces S19 to S1 in order and is finally projected to a target object (not shown).

Table 19 shows the radius of curvature R, thickness/distance d, refractive index N, and abbe number Vd of each lens of the optical lens of example 10. Table 20 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 10, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 19

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S3

-1.1813

-5.0216E-05

-3.5999E-06

1.1111E-08

1.1125E-09

-1.7696E-11

-1.8265E-12

4.1969E-14

S4

-25.0730

5.9839E-05

-5.0378E-06

1.0997E-07

-1.0455E-09

3.3510E-11

-5.3830E-12

1.0101E-13

S14

111.7484

-1.7139E-03

-1.4895E-06

-4.7634E-06

1.9798E-07

4.7660E-09

-9.1351E-10

1.9392E-11

S15

8.8839

-8.0227E-04

-5.0540E-05

6.4224E-06

-5.2212E-07

2.2518E-08

-4.0837E-10

1.1992E-12

Watch 20

Example 11

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

As shown in fig. 11, the optical lens includes, in order from a first side to a second side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a concave lens having negative refractive power, and has a concave first side surface S1 and a concave second side surface S2. The second lens L2 is a convex lens with positive refractive power, and has a convex first side S3 and a convex second side S4. The third lens L3 is a convex lens with positive refractive power, and has a convex first side S6 and a convex second side S7. The fourth lens L4 is a convex-concave lens having positive refractive power, and has a convex first side surface S8 and a concave second side surface S9. The fifth lens L5 is a convex-concave lens having negative refractive power, and has a convex first side surface S10 and a concave second side surface S11. The sixth lens L6 is a convex-concave lens having positive refractive power, and has a convex first side surface S12 and a concave second side surface S13. The seventh lens L7 is a concave-concave lens having negative refractive power, and has a concave first side surface S14 and a concave second side surface S15.

Table 21 shows the radius of curvature R, thickness/distance d, refractive index N, and abbe number Vd of each lens of the optical lens of example 11. Table 22 shows cone coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 11, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 21

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S3

-5.7771

-1.2627E-04

-6.5743E-06

8.4729E-08

1.0802E-10

-5.2545E-11

7.7215E-13

1.7635E-14

S4

143.0531

-4.3451E-05

-2.8959E-06

1.5907E-07

-2.5967E-09

4.9007E-11

-1.1080E-12

9.3629E-15

S14

111.7484

-1.7822E-03

1.9339E-05

-6.3505E-06

3.1841E-07

1.1122E-08

-1.3752E-09

2.5376E-11

S15

8.9881

-1.2525E-03

-1.0655E-05

5.0871E-06

-5.3065E-07

2.4910E-08

-4.8680E-10

2.1057E-12

TABLE 22

Example 12

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

As shown in fig. 12, the optical lens includes, in order from a first side to a second side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

The first lens L1 is a concave-concave lens having negative refractive power, and the first side surface S1 is a concave surface and the second side surface S2 is a concave surface. The second lens L2 is a convex lens with positive refractive power, and has a convex first side surface S3 and a convex second side surface S4. The third lens L3 is a convex lens with positive refractive power, and has a convex first side S6 and a convex second side S7. The fourth lens L4 is a convex lens having positive refractive power, and has a convex first side surface S8 and a convex second side surface S9. The fifth lens L5 is a concave-concave lens having negative refractive power, and has a concave first side surface S10 and a concave second side surface S11. The sixth lens L6 is a convex-concave lens having negative refractive power, and has a convex first side surface S12 and a concave second side surface S13. The seventh lens L7 is a concave-concave lens having negative refractive power, and has a concave first side surface S14 and a concave second side surface S15.

Table 23 shows the radius of curvature R, thickness/distance d, refractive index N, and abbe number Vd of each lens of the optical lens of example 12. Table 24 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 12, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 23

Flour mark

k

A4

A6

A8

A10

A12

A14

A16

S3

-44.8980

-1.5795E-04

-2.3734E-06

1.4245E-07

-2.4191E-09

-2.1338E-10

-1.8971E-12

2.5802E-13

S4

85.0699

2.1373E-05

-6.0288E-06

1.0342E-07

-2.2064E-09

1.2274E-10

1.4286E-12

-8.9015E-14

S14

111.7484

-2.4504E-03

4.1699E-05

-6.5126E-06

3.0800E-07

9.6824E-09

-1.5437E-09

4.5141E-11

S15

7.6593

-1.4217E-03

-2.6531E-05

5.9593E-06

-5.0747E-07

2.5369E-08

-4.9912E-10

-2.2876E-12

Watch 24

In summary, examples 1 to 12 satisfy the relationships shown in the following tables 25-1, 25-2 and 25-3, respectively. In tables 25-1, 25-2, and 25-3, TTL, F1, F2, F3, F4, F5, F6, F7, SAG61, SAG62, D61, D62, D, BFL, R6, R7, H, F456, EPD, D4, D5, D6, ti10, D46, F45, T, and D7 are all in millimeters (mm), FOV is in degrees (°), and θ 1 and θ 2 are in radians.

TABLE 25-1

TABLE 25-2

Tables 25 to 3

The present application also provides an electronic device that may include the optical lens according to the above-described embodiments of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be a stand-alone electronic device such as a range finding camera or may be an imaging module integrated on a device such as a range finding device. 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. An optical lens, comprising, in order from a first side to a second side along an optical axis:

the first lens with negative focal power has a concave first side surface and a concave second side surface;

a second lens with positive focal power, wherein the first side surface of the second lens is a convex surface;

a third lens having positive refractive power, the first side surface of which is convex and the second side surface of which is convex;

a fourth lens with positive focal power, wherein the first side surface of the fourth lens is a convex surface;

a fifth lens with negative focal power, wherein the second side surface of the fifth lens is a concave surface;

a sixth lens having a refractive power, a first side surface of which is a convex surface and a second side surface of which is a concave surface; and

and the second side surface of the seventh lens is a concave surface.

2. An optical lens according to claim 1, characterized in that the second side of the second lens is concave.

3. An optical lens barrel according to claim 1, wherein the second side of the second lens is convex.

4. An optical lens barrel according to claim 1, wherein the second side surface of the fourth lens is concave.

5. An optical lens barrel according to claim 1, wherein the second side surface of the fourth lens is convex.

6. An optical lens barrel according to claim 1, wherein the first side of the fifth lens is convex.

7. An optical lens according to claim 1, characterized in that the first side of the fifth lens is concave.

8. An optical lens barrel according to claim 1, wherein the first side of the seventh lens is concave.

9. An optical lens, comprising, in order from a first side to a second side along an optical axis:

a first lens having a negative optical power;

a second lens having positive optical power;

a third lens having a positive optical power;

a fourth lens having a positive optical power;

a fifth lens having a negative optical power;

a sixth lens having optical power; and

a seventh lens having a negative optical power,

wherein the fourth lens, the fifth lens and the sixth lens are cemented to form a cemented lens.

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.