Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device comprising the same. The optical lens comprises, in order from a first side to a second side along an optical axis: a first lens with negative optical power, the first side of which is a convex surface and the second side of which is a concave surface; a second lens with negative optical power, the first side of which is a concave surface and the second side of which is a convex surface; a third lens with positive optical power, the first side of which is a convex surface and the second side of which is a concave surface; a fourth lens with positive optical power, the first side of which is a convex surface; and a fifth lens with positive optical power, the first side of which is a convex surface.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical elements, and more particularly, to an optical lens and an electronic device. BACKGROUND

[0002] With the rapid development of automobile auxiliary driving, laser radar becomes an important device for realizing automobile auxiliary driving, which relies on analyzing the received reflected laser to determine the related information of the obstacle object, such as position, speed, etc. The optical lens is an important component of the laser radar. As described above, the optical lens is needed at the receiving end of the laser radar to receive the light beam.

[0003] Unlike ordinary optical lenses, the receiving end lens of the laser radar needs to collect as much reflected light as possible, so that the chip at the back can receive most of the energy of the reflected light. Therefore, the receiving end lens of the laser radar requires a small FNO, so that the optical lens can receive more light, while also maintaining the miniaturization of the optical lens.

[0004] Therefore, there is an urgent need in the market for an optical lens that can better meet the requirements of miniaturization and high energy light collection. SUMMARY

[0005] The present application provides an optical lens. The optical lens comprises, in order from a first side to a second side along an optical axis: a first lens having a negative focal power, a first side of which is a convex surface and a second side of which is a concave surface; a second lens having a negative focal power, a first side of which is a concave surface and a second side of which is a convex surface; a third lens having a positive focal power, a first side of which is a convex surface and a second side of which is a concave surface; a fourth lens having a positive focal power, a first side of which is a convex surface; and a fifth lens having a positive focal power, a first side of which is a convex surface.

[0006] In one embodiment, the second side of the fourth lens is a concave surface.

[0007] In one embodiment, the second side of the fourth lens is a convex surface.

[0008] In one embodiment, the second side of the fifth lens is a concave surface.

[0009] In one embodiment, the second side of the fifth lens is a convex surface.

[0010] In one embodiment, the total length TTL of the optical lens and the total effective focal length F of the optical lens satisfy: TTL / F≤4.5.

[0011] In an embodiment, the maximum entrance pupil diameter EPD of the optical lens, the maximum entrance pupil diameter EPD of the optical lens, the maximum image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 0.6

[0012] In an embodiment, the maximum entrance pupil diameter EPD of the optical lens, the maximum entrance pupil diameter EPD of the optical lens, the maximum image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 0.6

[0013] In an embodiment, the total track length TTL of the optical lens and the maximum value DMAX of the maximum entrance pupil diameter EPD of the optical lens, the maximum entrance pupil diameter EPD of the optical lens, the maximum image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 0.6

[0014] In an embodiment, the total track length TTL of the optical lens and the maximum value DMAX of the maximum entrance pupil diameter EPD of the optical lens, the maximum entrance pupil diameter EPD of the optical lens, the maximum image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 0.6

[0015] In an embodiment, the total track length TTL of the optical lens and the maximum value DMAX of the maximum entrance pupil diameter EPD of the optical lens, the maximum entrance pupil diameter EPD of the optical lens, the maximum image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 0.6

[0016] In an embodiment, the total track length TTL of the optical lens and the maximum value DMAX of the maximum entrance pupil diameter EPD of the optical lens, the maximum entrance pupil diameter EPD of the optical lens, the maximum image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 0.6

[0017] In an embodiment, the maximum value D1 of the maximum entrance pupil diameter of the first side of the first lens and the maximum value D2 of the maximum entrance pupil diameter of the first side of the second lens satisfy: |D1-D2|≤3.

[0018] In an embodiment, the maximum value D4 of the maximum entrance pupil diameter of the first side of the fourth lens and the maximum value D2 of the maximum entrance pupil diameter of the first side of the second lens satisfy: D4 / D2≤1.2.

[0019] In an embodiment, the central thickness d2 of the second lens, the interval distance d23 of the second lens and the third lens on the optical axis, the central thickness d3 of the third lens, the interval distance d34 of the third lens and the fourth lens on the optical axis, and the central thickness d4 of the fourth lens satisfy: (d2+d23+d3+d34+d4) / (d2+d3+d4)≤2.

[0020] In an embodiment, the interval distance d45 of the fourth lens and the fifth lens on the optical axis and the central thickness d5 of the fifth lens satisfy: d45 / d5≥0.5.

[0021] In an embodiment, the central radius of curvature R1 of the first side surface of the first lens and the central radius of curvature R2 of the second side surface of the first lens satisfy: 1≤R1 / R2≤2.

[0022] In an embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: -15≤F2 / F≤-4.

[0023] In an embodiment, the central radius of curvature R4 of the second side surface of the second lens and the central radius of curvature R5 of the first side surface of the third lens satisfy: |(|R4|-R5) / (|R4|+R5)|≤1.

[0024] In an embodiment, the sagittal height SAG31 of the first side surface of the third lens, the maximum sagittal half diameter D31 of the first side surface of the third lens, the sagittal height SAG32 of the second side surface of the third lens, and the maximum sagittal half diameter D32 of the second side surface of the third lens satisfy: (SAG31 / D31) / (SAG32 / D32)≥1.5.

[0025] In an embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy: 2≤F3 / F≤7.

[0026] In an embodiment, the central radius of curvature R6 of the second side surface of the third lens and the central radius of curvature R7 of the first side surface of the fourth lens satisfy: |(R6-R7) / (R6+R7)|≤1.5.

[0027] In an embodiment, the central radius of curvature R7 of the first side surface of the fourth lens and the central radius of curvature R8 of the second side surface of the fourth lens satisfy: |R7 / R8|≥0.15.

[0028] In an embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy: 1≤F4 / F≤4.

[0029] In an embodiment, an effective focal length F5 of the fifth lens and a total effective focal length F of the optical lens satisfy: 0.5≤F5 / F≤4.

[0030] In an embodiment, an effective focal length F4 of the fourth lens and an effective focal length F5 of the fifth lens satisfy: |F4 / F5|≤3.

[0031] In an embodiment, a back focal length BFL of the optical lens and a total length TTL of the optical lens satisfy: BFL / TTL≥0.05.

[0032] In an embodiment, the first side and / or the second side of the fifth lens has at least one inflection point.

[0033] Another aspect of the present application provides another optical lens. The optical lens comprises, in order from a first side to a second side along an optical axis, a first lens having negative refractive power; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens having positive refractive power; and a fifth lens having positive refractive power; wherein a total length TTL of the optical lens and a total effective focal length F of the optical lens satisfy: TTL / F≤4.5.

[0034] In an embodiment, the first side of the first lens is convex, and the second side is concave.

[0035] In an embodiment, the first side of the second lens is concave, and the second side is convex.

[0036] In an embodiment, the first side of the third lens is convex, and the second side is concave.

[0037] In an embodiment, the first side of the fourth lens is convex, and the second side is concave.

[0038] In an embodiment, the first side of the fourth lens is convex, and the second side is convex.

[0039] In an embodiment, the first side of the fifth lens is convex, and the second side is concave.

[0040] In an embodiment, the first side of the fifth lens is convex, and the second side is convex.

[0041] In an embodiment, a maximum clear aperture D of the first side of the first lens corresponding to a maximum field of view of the optical lens, an image height H corresponding to the maximum field of view of the optical lens, and a maximum field of view FOV of the optical lens satisfy: 0.04≤D / H / FOV≤0.3.

[0042] In one embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: 1≤D / H / tan(FOV)≤7.

[0043] In one embodiment, the total length TTL of the optical lens and the maximum value DMAX from the maximum half-aperture of the first side of the first lens to the maximum half-aperture of the second side of the fifth lens satisfy: 3≤TTL / DMAX≤4.5.

[0044] In one embodiment, the entrance pupil diameter EPD of the optical lens and the maximum value DMAX among the maximum half-aperture of the first side of the first lens to the maximum half-aperture of the second side of the fifth lens satisfy: 1.2≤EPD / DMAX≤2.

[0045] In one embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy the following condition: 0.6 ≤ F / EPD ≤ 0.8.

[0046] In one embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 0.05≤D / H / F≤0.25.

[0047] In one embodiment, the maximum value D1 of the maximum half-aperture of the first side surface of the first lens and the maximum half-aperture of the second side surface of the first lens satisfies the following condition: |D1-D2|≤3.

[0048] In one embodiment, the maximum value D4 of the maximum half-aperture of the first side of the fourth lens and the maximum half-aperture of the second side of the fourth lens satisfies the following condition: D4 / D2≤1.2.

[0049] In one embodiment, the center thickness d2 of the second lens, the spacing d23 between the second and third lenses on the optical axis, the center thickness d3 of the third lens, the spacing d34 between the third and fourth lenses on the optical axis, and the center thickness d4 of the fourth lens satisfy: (d2+d23+d3+d34+d4) / (d2+d3+d4)≤2.

[0050] In one embodiment, the distance d45 between the fourth and fifth lenses on the optical axis and the center thickness d5 of the fifth lens satisfy: d45 / d5≥0.5.

[0051] In an embodiment, a central radius of curvature R1 of the first side surface of the first lens and a central radius of curvature R2 of the second side surface of the first lens satisfy: 1≤R1 / R2≤2.

[0052] In an embodiment, an effective focal length F2 of the second lens and a total effective focal length F of the optical lens satisfy: -15≤F2 / F≤-4.

[0053] In an embodiment, a central radius of curvature R4 of the second side surface of the second lens and a central radius of curvature R5 of the first side surface of the third lens satisfy: |(|R4|-R5) / (|R4|+R5)|≤1.

[0054] In an embodiment, a sagittal height SAG31 of the first side surface of the third lens, a maximum sagittal half diameter D31 of the first side surface of the third lens, a sagittal height SAG32 of the second side surface of the third lens, and a maximum sagittal half diameter D32 of the second side surface of the third lens satisfy: (SAG31 / D31) / (SAG32 / D32)≥1.5.

[0055] In an embodiment, an effective focal length F3 of the third lens and a total effective focal length F of the optical lens satisfy: 2≤F3 / F≤7.

[0056] In an embodiment, a central radius of curvature R6 of the second side surface of the third lens and a central radius of curvature R7 of the first side surface of the fourth lens satisfy: |(R6-R7) / (R6+R7)|≤1.5.

[0057] In an embodiment, a central radius of curvature R7 of the first side surface of the fourth lens and a central radius of curvature R8 of the second side surface of the fourth lens satisfy: |R7 / R8|≥0.15.

[0058] In an embodiment, an effective focal length F4 of the fourth lens and a total effective focal length F of the optical lens satisfy: 1≤F4 / F≤4.

[0059] In an embodiment, an effective focal length F5 of the fifth lens and a total effective focal length F of the optical lens satisfy: 0.5≤F5 / F≤4.

[0060] In an embodiment, an effective focal length F4 of the fourth lens and an effective focal length F5 of the fifth lens satisfy: |F4 / F5|≤3.

[0061] In an embodiment, a back focal length BFL of the optical lens and a total track length TTL of the optical lens satisfy: BFL / TTL≥0.05.

[0062] In one embodiment, the first side surface and / or the second side surface of the fifth lens has at least one inflection point.

[0063] Another aspect of the present application further provides an electronic device comprising the optical lens provided by the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0064] The present application adopts five lenses, and by optimizing the shape, optical power and the like of each lens, at least one of the following beneficial effects can be achieved: large optical lens entrance pupil diameter, small FNO, high energy light collection, compact structure, long back focal length, small aperture, uniform lens, and smooth light transition. BRIEF DESCRIPTION OF DRAWINGS

[0065] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the drawings:

[0066] Figure 1 FIG. 1 is a structural schematic diagram of an optical lens according to an embodiment of the present application;

[0067] Figure 2 FIG. 2 is a structural schematic diagram of an optical lens according to another embodiment of the present application;

[0068] Figure 3 FIG. 3 is a structural schematic diagram of an optical lens according to another embodiment of the present application;

[0069] Figure 4 FIG. 4 is a structural schematic diagram of an optical lens according to another embodiment of the present application;

[0070] Figure 5 FIG. 5 is a structural schematic diagram of an optical lens according to another embodiment of the present application;

[0071] Figure 6 FIG. 6 is a structural schematic diagram of an optical lens according to another embodiment of the present application;

[0072] Figure 7 FIG. 7 is a structural schematic diagram of an optical lens according to another embodiment of the present application; and

[0073] Figure 8 FIG. 8 is a structural schematic diagram of an optical lens according to another embodiment of the present application. DETAILED DESCRIPTION

[0074] For the purposes of the present application, a more complete description of which will follow, reference will be made to the accompanying drawings. It is to be understood that these detailed descriptions are merely exemplary of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, like reference numerals will refer to like elements every where the same may occur. The word "comprising" is used herein to mean including the element or elements listed thereafter but that not excluding the presence of one or more other elements or ingredients, methodologies, or steps. The word "comprising" is used herein to mean including whatever follows the word but not to the exclusion of anything not listed.

[0075] It is to be noted that the terms first, second, third, etc. are merely used to distinguish one feature from another, and do not imply any limitation on the features. Thus, a first lens discussed below can also be called a second lens or a third lens, without departing from the teachings of the present application.

[0076] In the drawings, the thickness, size, and shape of the lenses have been exaggerated slightly for the sake of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0077] In this document, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region; if a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is referred to as the first side surface of the lens, and the surface of each lens closest to the second side is referred to as the second side surface of the lens. The surface closest to the second side in the optical lens is referred to as the second side surface of the optical lens. Exemplarily, the first side can be the object side, and the second side can be the image side; or, the first side can be the imaging side, and the second side can be the image source side.

[0078] It should also be understood that the words "comprise", "comprising", "include", "including", and / or "contain", 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. In addition, when describing the embodiments of the present application, the use of "may" indicates that "one or more embodiments of the present application". Furthermore, the word "exemplary" is intended to mean an example or an illustration.

[0079] 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.

[0080] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0081] The features, principles, and other aspects of the present application are described in detail below.

[0082] In an exemplary embodiment, the optical lens includes, for example, five lenses with optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses are arranged in order along the optical axis from the first side to the second side.

[0083] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a vehicle-mounted lens. At this time, the first side of the optical lens can be the object side, and the second side can be the image side. Light from the object side can be imaged on the image side. The second side of the optical lens is the imaging surface of the optical lens.

[0084] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a projection lens or a laser radar transmitting end lens. At this time, the second side of the optical lens can be the image source side, and the first side can be the imaging side. Light from the image source side can be imaged on the imaging side. The second side of the optical lens is the image source surface of the optical lens.

[0085] In an exemplary embodiment, the optical lens can further include a photosensitive element disposed on the second side. Optionally, the photosensitive element disposed on the second side can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS).

[0086] In the example embodiment, the first lens can have a negative focal power, and the first lens can have a convex-concave surface type. The first lens is configured in this way, which is conducive to collecting as much light as possible from a large field of view into the rear optical system, and is conducive to fixing the direction of the large-angle light at the edge. When the first lens has a special lens shape (for example, the first lens has a special lens shape close to a concentric circle), the light path is smoothly transitioned to the rear optical system, which is conducive to improving the imaging quality of the optical lens, reducing the front aperture and volume of the optical lens, and achieving miniaturization and cost reduction of the optical lens. When the material of the first lens is a high refractive index material, the front aperture of the optical lens is reduced, and the imaging quality of the optical lens is further improved. In actual applications, considering that the vehicle-mounted lens is installed outdoors and used in harsh weather such as rain and snow, the crescent shape of the convex first side is more suitable for rain and snow environments, which is conducive to the sliding of water droplets, reduces the impact on imaging, and is conducive to achieving high-energy light collection.

[0087] In the example embodiment, the second lens can have a negative focal power, and the second lens can have a concave-convex surface type. The second lens is configured in this way, which is conducive to converging the light passing through the second lens, and is conducive to achieving a smooth transition of the light. At the same time, it is conducive to reducing the front aperture and volume of the optical lens, and is conducive to achieving miniaturization and cost reduction of the optical lens. Optionally, the second lens can have a small degree of curvature (for example, an opening angle of 50°).

[0088] In the example embodiment, the third lens can have positive refractive power, and the third lens can have a convex-concave surface type. The third lens adopts such refractive power and surface type, which is conducive to better convergence of light rays and conducive to high-energy light collection. At the same time, it is conducive to balancing the pressure of the second lens and the fourth lens, making the light ray trend smoothly transition to the rear optical system, relieving the pressure of the rear lens, conducive to the reduction of the rear aperture of the optical lens, conducive to the uniformity of the lens size, and achieving the effect of making the optical lens more compact. In addition, it is also conducive to controlling the light ray trend between the second lens and the fourth lens, reducing the aberration caused by the large-angle light rays passing through the second lens, and conducive to the miniaturization of the optical lens. Further, the second side surface of the third lens is set as a concave surface, which is conducive to increasing the contact area between the third lens and the mechanism plane during assembly, and conducive to reducing the sensitivity of the third lens to the tilt angle. Further, the second side surface of the third lens is set as a concave surface, and the difference between the opening angles of the first side surface and the second side surface of the third lens is large, which is conducive to better convergence of light rays from the second lens and conducive to higher-energy light collection. Further, the second side surface of the third lens is set as a concave surface, and the opening angle of the second side surface of the third lens is small, which is conducive to ensuring that the light rays emitted from the second side surface of the third lens are incident on the first side surface of the fourth lens in a relatively gentle manner, thereby reducing the overall tolerance sensitivity of the optical lens.

[0089] In the example embodiment, the fourth lens can have positive refractive power, and the fourth lens can have a convex-concave surface type. The fourth lens adopts such refractive power and surface type, which is conducive to collecting light rays from the third lens and making the light ray trend smoothly transition to the rear optical system. When the material of the fourth lens is a high refractive index material, it is conducive to reducing the rear aperture of the optical lens and conducive to high-energy light collection. The fourth lens can also have a double-convex surface type with a gentle shape change, and the fourth lens adopts such refractive power and surface type, which is conducive to the smooth entry of divergent light rays into the rear optical system and further makes the light ray trend smoothly transition.

[0090] In the example embodiment, the fifth lens can have positive refractive power, and the fifth lens can have a convex-concave surface type or a double-convex surface type with a gentle shape change, which is conducive to correcting astigmatism and field curvature and conducive to the optical lens achieving high-energy light collection. When the fifth lens has a convex-concave surface type and its material is a high refractive index material, it is conducive to reducing the rear aperture of the optical lens and conducive to the optical lens achieving high-energy light collection. When the fifth lens has a double-convex surface type and its material is a high refractive index material, it is conducive to light convergence, making the divergent light rays smoothly enter the rear optical system and further making the light ray trend smoothly transition.

[0091] In an exemplary embodiment, a diaphragm for converging light rays can be disposed between the fourth lens and the fifth lens to further improve the imaging quality of the optical lens. The diaphragm disposed between the fourth lens and the fifth lens helps to effectively converge the light rays entering the optical lens, reduce the back end lens aperture of the optical lens, and reduce the assembly sensitivity of the optical lens. In the embodiments of the present application, the diaphragm can be disposed near the second side surface of the fourth lens or near the first side surface of the fifth lens. However, it should be noted that the position of the diaphragm disclosed herein is only an example and not a limitation. In alternative embodiments, the diaphragm can also be disposed at other positions as needed.

[0092] In an exemplary embodiment, the fifth lens can have at least one inflection point. The inflection of the fifth lens helps to correct the field curvature and aberration of the optical lens, and helps to lower the chief ray angle, thereby improving the sensitivity of image capture and achieving higher energy light collection.

[0093] In an exemplary embodiment, the total length TTL of the optical lens involved in the present application can be the distance from the center of the first side surface of the first lens to the second side surface of the optical lens on the optical axis. The back focal length BFL of the optical lens involved in the present application can be the distance from the center of the second side surface of the fifth lens to the second side surface of the optical lens on the optical axis.

[0094] In an exemplary embodiment, the optical lens according to the present application can satisfy TTL / F≤4.5, where TTL is the total length of the optical lens and F is the total effective focal length of the optical lens. The optical lens satisfying TTL / F≤4.5 can make the optical lens more compact, which is conducive to the miniaturization of the optical lens. More specifically, TTL and F can further satisfy TTL / F≤4.

[0095] In an exemplary embodiment, the optical lens according to the present application can satisfy 0.04≤D / H / FOV≤0.3, where D is the maximum light passing aperture of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, and FOV is the maximum field of view angle of the optical lens. The optical lens satisfying 0.04≤D / H / FOV≤0.3 is conducive to reducing the front end aperture of the optical lens and conducive to the miniaturization of the optical lens. More specifically, D, H, and FOV can further satisfy 0.05≤D / H / FOV≤0.2.

[0096] In exemplary embodiments, the optical lens according to the present application can satisfy: 1≤D / H / tan(FOV)≤7, where D is a maximum entrance pupil diameter of the optical lens, H is an image height corresponding to a maximum field of view of the optical lens, and FOV is a maximum field of view of the optical lens. The optical lens satisfying 1≤D / H / tan(FOV)≤7 is conducive to reducing the front aperture of the optical lens, and is conducive to miniaturization of the optical lens. More specifically, D, H and FOV can further satisfy: 2≤D / H / tan(FOV)≤6.

[0097] In exemplary embodiments, the optical lens according to the present application can satisfy: 3≤TTL / DMAX≤4.5, where TTL is a total track length of the optical lens, and DMAX is a maximum value of a maximum half entrance pupil diameter of the first side surface of the first lens to a maximum half entrance pupil diameter of the second side surface of the fifth lens. The optical lens satisfying 3≤TTL / DMAX≤4.5 is conducive to making the optical lens more compact as a whole, and is conducive to reducing the volume of the optical lens. More specifically, TTL and DMAX can further satisfy: 3.5≤TTL / DMAX≤4.

[0098] In exemplary embodiments, the optical lens according to the present application can satisfy: 1.2≤EPD / DMAX≤2, where EPD is an entrance pupil diameter of the optical lens, and DMAX is a maximum value of a maximum half entrance pupil diameter of the first side surface of the first lens to a maximum half entrance pupil diameter of the second side surface of the fifth lens. The optical lens satisfying 1.2≤EPD / DMAX≤2 is conducive to reducing the aperture of the optical lens as a whole, is conducive to making the optical lens more compact as a whole, and is conducive to miniaturization of the optical lens. More specifically, EPD and DMAX can further satisfy: 1.3≤EPD / DMAX≤1.7.

[0099] In exemplary embodiments, the optical lens according to the present application can satisfy: 0.6≤F / EPD≤0.8, where F is a total effective focal length of the optical lens, and EPD is an entrance pupil diameter of the optical lens. The optical lens satisfying 0.6≤F / EPD≤0.8 can make the optical lens have a larger light quantity in a case of having a smaller aperture value. More specifically, F and EPD can further satisfy: 0.65≤F / EPD≤0.75.

[0100] In an example embodiment, the optical lens according to the present application can satisfy: 0.05≤D / H / F≤0.25, where D is the maximum light passing diameter of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, and F is the total effective focal length of the optical lens. The optical lens satisfying 0.05≤D / H / F≤0.25 can make the optical lens have the characteristics of large target surface and small aperture under the condition of fixed focal length. More specifically, D, H and F can further satisfy: 0.07≤D / H / F≤0.2.

[0101] In an example embodiment, the optical lens according to the present application can satisfy: |D1-D2|≤3, where D1 is the maximum value of the maximum light passing half diameter of the first side of the first lens and the maximum light passing half diameter of the second side of the first lens, and D2 is the maximum value of the maximum light passing half diameter of the first side of the second lens and the maximum light passing half diameter of the second side of the second lens. The optical lens satisfying |D1-D2|≤3 can help the sizes of the lenses in the optical lens to be uniform, which is conducive to making the optical lens more compact. More specifically, D1 and D2 can further satisfy: |D1-D2|≤2.5.

[0102] In an example embodiment, the optical lens according to the present application can satisfy: D4 / D2≤1.2, where D4 is the maximum value of the maximum light passing half diameter of the first side of the fourth lens and the maximum light passing half diameter of the second side of the fourth lens, and D2 is the maximum value of the maximum light passing half diameter of the first side of the second lens and the maximum light passing half diameter of the second side of the second lens. The optical lens satisfying D4 / D2≤1.2 can make the maximum light passing half diameters of the second lens and the fourth lens close, so that the sizes of the two lenses are uniform, which is conducive to making the optical lens more compact. More specifically, D4 and D2 can further satisfy: D4 / D2≤1.18.

[0103] In an example embodiment, the optical lens according to the present application can satisfy: (d2+d23+d3+d34+d4) / (d2+d3+d4)≤2, where d2 is the center thickness of the second lens, d23 is the interval distance of the second lens and the third lens on the optical axis, d3 is the center thickness of the third lens, d34 is the interval distance of the third lens and the fourth lens on the optical axis, and d4 is the center thickness of the fourth lens. The optical lens satisfying (d2+d23+d3+d34+d4) / (d2+d3+d4)≤2 is conducive to reducing the interval distances between the second lens, the third lens and the fourth lens, which is conducive to the sizes of the three lenses being uniform, and is conducive to making the optical lens more compact. More specifically, d2, d23, d3, d34 and d4 can further satisfy: (d2+d23+d3+d34+d4) / (d2+d3+d4)≤1.5.

[0104] In exemplary embodiments, the optical lens according to the present application can satisfy: d45 / d5≥0.5, where d45 is the interval distance of the fourth lens and the fifth lens on the optical axis, and d5 is the center thickness of the fifth lens. The optical lens satisfying 0.5≤d45 / d5 can make the interval distance of the fourth lens and the fifth lens larger, which is beneficial to the smooth light trend and helps to realize the smooth transition of light from the fourth lens to the fifth lens. More specifically, d45 and d5 can further satisfy: d45 / d5≥0.8.

[0105] In exemplary embodiments, the optical lens according to the present application can satisfy: 1≤R1 / R2≤2, where R1 is the center curvature radius of the first side surface of the first lens, and R2 is the center curvature radius of the second side surface of the first lens. The optical lens satisfying 1≤R1 / R2≤2 can make the first lens have a special lens shape close to a concentric circle, which is beneficial to the smooth transition of light to the rear optical system, helps to improve the imaging quality of the optical lens and realize high-energy light collection. More specifically, R1 and R2 can further satisfy: 1.2≤R1 / R2≤1.8.

[0106] In exemplary embodiments, the optical lens according to the present application can satisfy: -15≤F2 / F≤-4, where F2 is the effective focal length of the second lens, and F is the total effective focal length of the optical lens. The optical lens satisfying -15≤F2 / F≤-4 helps to smoothly transition light to the third lens to reduce the sensitivity of the optical lens. More specifically, F2 and F can further satisfy: -14≤F2 / F≤-5.

[0107] In exemplary embodiments, the optical lens according to the present application can satisfy: |(|R4|-R5) / (|R4|+R5)|≤1, where R4 is the center curvature radius of the second side surface of the second lens, and R5 is the center curvature radius of the first side surface of the third lens. The optical lens satisfying |(|R4|-R5) / (|R4|+R5)|≤1 helps to reduce the second side surface angle of the second lens and helps to make the curvature radius of the second side surface of the second lens close to the curvature radius of the first side surface of the third lens, so as to ensure that the light emitted by the second lens is incident to the second side surface of the third lens. The incident light is relatively smooth, thereby helping to reduce the tolerance sensitivity of the optical lens. More specifically, R4 and R5 can further satisfy: |(|R4|-R5) / (|R4|+R5)|≤0.5.

[0108] In exemplary embodiments, the optical lens according to the present application can satisfy: (SAG31 / D31) / (SAG32 / D32)≥1.5, wherein SAG31 is the sag of the first side of the third lens, D31 is the maximum half light passing radius of the first side of the third lens, SAG32 is the sag of the second side of the third lens, and D32 is the maximum half light passing radius of the second side of the third lens. The optical lens satisfying (SAG31 / D31) / (SAG32 / D32)≥1.5 can make the third lens have a meniscus shape convex to the first side, and can make the first side and the second side of the third lens have a large difference in opening angle, which helps to better converge the light passing through the second lens, and is conducive to achieving higher energy light collection. More specifically, SAG31, D31, SAG32, and D32 can further satisfy: (SAG31 / D31) / (SAG32 / D32)≥2.

[0109] In exemplary embodiments, the optical lens according to the present application can satisfy: 2≤F3 / F≤7, wherein F3 is the effective focal length of the third lens, and F is the total effective focal length of the optical lens. The optical lens satisfying 2≤F3 / F≤7, and when the third lens has a convex-concave shape, can effectively control the light path between the second lens and the fourth lens, which helps to reduce the aberration caused by the large-angle light passing through the second lens. At the same time, it helps to make the optical lens compact and small in size. More specifically, F3 and F can further satisfy: 3≤F3 / F≤6.

[0110] In exemplary embodiments, the optical lens according to the present application can satisfy: |(R6-R7) / (R6+R7)|≤1.5, wherein R6 is the central curvature radius of the second side of the third lens, and R7 is the central curvature radius of the first side of the fourth lens. The optical lens satisfying |(R6-R7) / (R6+R7)|≤1.5, and when the third lens has a meniscus shape convex to the first side and the second side of the third lens has a small opening angle, helps to ensure that the light exiting from the third lens is incident to the first side of the fourth lens, and the incident light is relatively gentle, which helps to reduce the tolerance sensitivity of the optical lens. More specifically, R6 and R7 can further satisfy: |(R6-R7) / (R6+R7)|≤1.

[0111] In exemplary embodiments, the optical lens according to the present application can satisfy: |R7 / R8|≥0.15, wherein R7 is the central curvature radius of the first side of the fourth lens, and R8 is the central curvature radius of the second side of the fourth lens. The optical lens satisfying |R7 / R8|≥0.15 is conducive to making the shapes of the first side and the second side of the fourth lens close, thereby helping to gently transition the peripheral light, and is conducive to reducing the sensitivity of the fourth lens. More specifically, R7 and R8 can further satisfy: R7 / R8≥0.16.

[0112] In exemplary embodiments, the optical lens according to the present application can satisfy: 1≤F4 / F≤4, wherein F4 is the effective focal length of the fourth lens, and F is the total effective focal length of the optical lens. The optical lens satisfying 1≤F4 / F≤4 can make the focal length of the fourth lens shorter, which is beneficial to converging light and ensuring the light throughput of the entire optical lens. More specifically, F4 and F can further satisfy: 1.5≤F4 / F≤3.

[0113] In exemplary embodiments, the optical lens according to the present application can satisfy: 0.5≤F5 / F≤4, wherein F5 is the effective focal length of the fifth lens, and F is the total effective focal length of the optical lens. The optical lens satisfying 0.5≤F5 / F≤4 can make the focal length of the fifth lens shorter, which is beneficial to further converging light and ensuring the light throughput of the entire optical lens. More specifically, F5 and F can further satisfy: 1≤F5 / F≤3.

[0114] In exemplary embodiments, the optical lens according to the present application can satisfy: |F4 / F5|≤3, wherein F4 is the effective focal length of the fourth lens, and F5 is the effective focal length of the fifth lens. The optical lens satisfying |F4 / F5|≤3 can make the focal lengths of the fourth lens and the fifth lens close, which is helpful to realize smooth transition of light and is beneficial to realize higher energy light collection. More specifically, F4 and F5 can further satisfy: |F4 / F5|≤2.

[0115] In exemplary embodiments, the optical lens according to the present application can satisfy: BFL / TTL≥0.05. Wherein BFL is the back focal length of the optical lens, and TTL is the total length of the optical lens. The optical lens satisfying BFL / TTL≥0.05 is helpful to increase the back focal length of the optical lens and is beneficial to the assembly of the optical lens. More specifically, BFL and TTL can further satisfy: BFL / TTL≥0.08.

[0116] In the example embodiments, the first to fifth lenses can be spherical lenses or aspherical lenses. For example, the first, third and fourth lenses can be spherical lenses, and the second and fifth lenses can be aspherical lenses. The second and fifth lenses being aspherical lenses is advantageous for correcting field curvature and for achieving high energy light collection. The application does not specifically limit the number of spherical lenses and aspherical lenses, and the number of aspherical lenses can be increased when the imaging quality is emphasized. In particular, to improve the resolving power of the optical system, the first, third and fourth lenses can all be aspherical lenses. An aspherical lens is characterized in that the curvature continuously changes from the center to the periphery of the lens. Unlike a spherical lens having 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 astigmatism aberration. By using an aspherical lens, aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality of the lens.

[0117] In the example embodiments, the optical lens according to the application can further include a filter and / or protective glass disposed between the fifth lens and the imaging surface, to filter light having different wavelengths and to prevent damage to the image-side element (e.g., a chip) of the optical lens.

[0118] The optical lens according to the above-described embodiments of the application has at least one of the following beneficial effects: small size, high energy light collection, compact structure, large entrance pupil diameter, small FNO, uniform lens size, and the like, by reasonable setting of the shapes and optical powers of the lenses, while using only five lenses. In addition, compared with ordinary optical lenses, the optical lens according to the application has a back focal length and a small aperture when the FNO is 0.7. Furthermore, the ratio of the total length of the optical lens to the maximum value of the maximum semi-aperture of each lens is small, which helps the optical lens to further achieve a compact structure and small size. At the same time, the second lens in the optical lens has a low degree of curvature (e.g., an opening angle of only 50 degrees), which helps to achieve a smooth transition of light and helps to make the front end of the lens have a small aperture.

[0119] In exemplary embodiments, the first lens, the second lens, the third lens, the fourth lens, and the fifth lens can all be glass lenses. Optical lenses made of glass can suppress the shift of the back focal length of the optical lens with temperature changes, to improve system stability. Meanwhile, using glass material can avoid the imaging blur of the lens caused by high and low temperature changes in the use environment, affecting the normal use of the lens. For example, the optical lens with all-glass design has a wide temperature range, and can maintain stable optical performance in the range of -40°C to 105°C. Specifically, when focusing on image quality and reliability, the first lens to the fifth lens can all be glass aspherical lenses. Of course, in application occasions with low temperature stability requirements, the first lens to the fifth lens in the optical lens can also be made of plastic. Making optical lenses with plastic can effectively reduce the manufacturing cost. Of course, the first lens to the fifth lens in the optical lens can also be made of plastic and glass.

[0120] However, those skilled in the art should understand that the number of lenses constituting the lens can be changed without departing from the technical solutions claimed in the present application, to obtain the various results and advantages described in the specification. For example, although five lenses are described in the embodiments, the optical lens is not limited to including five lenses. If necessary, the optical lens can also include other numbers of lenses.

[0121] The specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0122] Example 1

[0123] The following refers to Figure 1 The optical lens according to Embodiment 1 of the present application is described. Figure 1 The structural schematic diagram of the optical lens according to Embodiment 1 of the present application is shown.

[0124] As Figure 1 shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 in order from the first side to the second side along the optical axis.

[0125] The first lens L1 is a meniscus lens with negative focal power, the first side S1 is convex, and the second side S2 is concave. The second lens L2 is a meniscus lens with negative focal power, the first side S3 is concave, and the second side S4 is convex. The third lens L3 is a meniscus lens with positive focal power, the first side S5 is convex, and the second side S6 is concave. The fourth lens L4 is a meniscus lens with positive focal power, the first side S7 is convex, and the second side S8 is concave. The fifth lens L5 is a meniscus lens with positive focal power, the first side S10 is convex, and the second side S11 is concave. The first side S10 and the second side S11 of the fifth lens L5 have at least one inflection point. Specifically, the first side S10 of the fifth lens is convex in the paraxial region, and the second side S11 is concave in the paraxial region. The first side S10 of the fifth lens is convex in the circumferential region, and the second side S11 is convex in the circumferential region.

[0126] The optical lens can further include a stop STO, which can be disposed between the fourth lens L4 and the fifth lens L5. For example, the stop STO can be disposed close to the second side S8 of the fourth lens L4.

[0127] Exemplarily, the optical lens can further include two auxiliary lenses L6 and L7 with no focal power, the auxiliary lens L6 can have a first side S12 and a second side S13, and the auxiliary lens L7 can have a first side S14 and a second side S15. Optionally, the auxiliary lenses L6 and L7 can be a filter or a protective glass. The filter can be used to correct color deviation. The protective glass can be used to protect the image sensor chip IMA located at the imaging surface S16.

[0128] The optical lens provided by the present application can be used as, for example, a vehicle-mounted lens, at this time, light from an object sequentially passes through each surface S1 to S15 and is finally imaged on the imaging surface S16 disposed on the second side, wherein the imaging surface S16 is provided with an image sensor chip IMA. It should be understood that the optical lens provided by the present application can also be used as, for example, a projection lens or a laser radar transmitting end lens, at this time, light from the image source side sequentially passes through each surface S15 to S1 and is finally projected onto the projection surface (not shown) disposed on the first side, wherein the image source surface is provided with an image sensor chip IMA.

[0129] Table 1 shows the center curvature radius R, thickness / distance d (it should be understood that the thickness d of the row where S1 is located is the center thickness d1 of the first lens L1, the thickness d of the row where S2 is located is the interval distance d12 on the optical axis between the second side of the first lens L1 and the first side of the second lens L2, and so on), refractive index Nd, and Abbe number Vd of each lens of the optical lens of embodiment 1.

[0130]

[0131] Table 1

[0132] In embodiment 1, the first side S3 and the second side S4 of the second lens L2 and the first side S10 and the second side S11 of the fifth lens L5 can each be an aspherical surface, and the surface type x of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0133]

[0134] wherein x is the sag of the aspherical surface at a position along the optical axis with a height of h, c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the curvature radius R in Table 1 above), k is the conic coefficient, and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below provides the conic coefficient k and the high-order term coefficients A4, A6, A8, A10 and A12 of the aspherical surfaces S3, S4, S10 and S11 in embodiment 1.

[0135] Face number k A4 A6 A8 A10 A12 S3 -3.327E+01 -1.052E-04 2.902E-07 -1.631E-09 5.525E-13 8.051E-15 S4 -1.755E+02 -8.540E-05 3.881E-07 -1.856E-09 4.469E-12 -3.483E-15 S10 -6.500E-01 6.205E-05 -1.596E-06 1.542E-08 2.730E-11 -2.847E-12 S11 -1.758E+00 6.503E-05 1.058E-05 -4.866E-07 4.504E-09 -8.961E-12

[0136] Table 2

[0137] Example 2

[0138] The optical lens according to embodiment 2 of the present application is described below with reference to Figure 2 The structure of the optical lens according to embodiment 2 of the present application is shown in FIG. 2. Figure 2 As shown in FIG. 2, the optical lens comprises, in order from the first side to the second 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.

[0139] As shown in FIG. 2, the optical lens comprises, in order from the first side to the second 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. Figure 2 The first lens L1 is a meniscus lens with negative focal power, the first side S1 of which is convex and the second side S2 of which is concave. The second lens L2 is a meniscus lens with negative focal power, the first side S3 of which is concave and the second side S4 of which is convex. The third lens L3 is a meniscus lens with positive focal power, the first side S5 of which is convex and the second side S6 of which is concave. The fourth lens L4 is a meniscus lens with positive focal power, the first side S7 of which is convex and the second side S8 of which is concave. The fifth lens L5 is a meniscus lens with positive focal power, the first side S10 of which is convex and the second side S11 of which is concave.

[0140] The optical lens can further comprise a stop STO, which can be disposed between the fourth lens L4 and the fifth lens L5. For example, the stop STO can be disposed close to the second side S8 of the fourth lens L4.

[0141]

[0142] ​Exemplarily, the optical lens can further include auxiliary lenses L6 and L7 without optical power, the auxiliary lens L6 can have a first side S12 and a second side S13, and the auxiliary lens L7 can have a first side S14 and a second side S15. Optionally, the auxiliary lenses L6 and L7 can be a filter or a protective glass. The filter can be used to correct color deviation. The protective glass can be used to protect the image sensor chip IMA located at the imaging surface S16.

[0143] The optical lens provided by the present application can be used as, for example, a vehicle-mounted lens, at this time, light from an object sequentially passes through each surface S1 to S15 and is finally imaged on the imaging surface S16 arranged on the second side, wherein the imaging surface S16 is arranged with an image sensor chip IMA. It should be understood that the optical lens provided by the present application can also be used as, for example, a projection lens or a laser radar transmitting end lens, at this time, light from the image source side sequentially passes through each surface S15 to S1 and is finally projected onto the projection surface (not shown) arranged on the first side, wherein the image source surface is arranged with an image sensor chip IMA.

[0144] Table 3 shows the center curvature radius R, thickness / distance d, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 2. Table 4 shows the conic coefficient and high-order term coefficient that can be used for each aspherical surface in Example 2, wherein each aspherical surface can be defined by the formula (1) given in Example 1 above.

[0145]

[0146]

[0147] Table 3

[0148] Face number k A4 A6 A8 A10 A12 S3 -2.266E+01 -1.317E-04 5.126E-07 -2.070E-09 1.600E-12 1.009E-14 S4 -1.755E+02 -8.031E-05 4.114E-07 -1.870E-09 4.892E-12 -4.475E-15 S10 -7.741E-01 3.645E-05 8.622E-07 -2.710E-08 4.715E-10 -3.120E-12 S11 -8.898E-01 1.006E-04 7.745E-06 -1.751E-07 -6.409E-10 1.716E-11

[0149] Table 4

[0150] Example 3

[0151] The following refers to Figure 3 An optical lens according to Example 3 of the present application is described. Figure 3 A structural schematic diagram of the optical lens according to Example 3 of the present application is shown.

[0152] As Figure 3 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5 along the optical axis from the first side to the second side.

[0153] The first lens L1 is a meniscus lens with negative focal power, the first side S1 is convex, and the second side S2 is concave. The second lens L2 is a meniscus lens with negative focal power, the first side S3 is concave, and the second side S4 is convex. The third lens L3 is a meniscus lens with positive focal power, the first side S5 is convex, and the second side S6 is concave. The fourth lens L4 is a double convex lens with positive focal power, the first side S7 is convex, and the second side S8 is convex. The fifth lens L5 is a meniscus lens with positive focal power, the first side S10 is convex, and the second side S11 is concave.

[0154] The optical lens can further include a stop STO, which can be disposed between the fourth lens L4 and the fifth lens L5. For example, the stop STO can be disposed close to the second side S8 of the fourth lens L4.

[0155] Exemplarily, the optical lens can further include two auxiliary lenses L6 and L7 with no focal power, the auxiliary lens L6 can have a first side S12 and a second side S13, and the auxiliary lens L7 can have a first side S14 and a second side S15. Optionally, the auxiliary lenses L6 and L7 can be a filter or a protective glass. The filter can be used to correct color deviation. The protective glass can be used to protect the image sensor chip IMA located at the imaging surface S16.

[0156] The optical lens provided by the present application can be used as, for example, a vehicle-mounted lens, in which case the light from the object sequentially passes through each surface S1 to S15 and is finally imaged on the imaging surface S16 disposed on the second side, wherein the imaging surface S16 is provided with an image sensor chip IMA. It should be understood that the optical lens provided by the present application can also be used as, for example, a projection lens or a laser radar transmitting end lens, in which case the light from the image source side sequentially passes through each surface S15 to S1 and is finally projected onto the projection surface (not shown) disposed on the first side, wherein the image source surface is provided with an image sensor chip IMA.

[0157] Table 5 shows the center curvature radius R, thickness / interval d, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 3. Table 6 shows the conic coefficient and high-order term coefficient that can be used for each aspherical surface in Example 3, wherein each aspherical surface can be defined by the formula (1) given in Example 1 above.

[0158]

[0159] Table 5

[0160] Face number k A4 A6 A8 A10 A12 S3 -2.160E+01 -1.068E-04 2.988E-07 -1.662E-09 1.823E-13 1.172E-14 S4 -1.755E+02 -8.133E-05 3.894E-07 -1.830E-09 4.752E-12 -3.844E-15 S10 -5.267E-01 5.193E-05 -3.402E-07 1.931E-08 -1.799E-10 7.485E-13 S11 1.228E+00 1.504E-04 4.262E-07 5.908E-08 -2.604E-10 -2.696E-11

[0161] Table 6

[0162] Example 4

[0163] The following refers to Figure 4 An optical lens according to Embodiment 4 of the present application is described. Figure 4 A structural schematic diagram of an optical lens according to Embodiment 4 of the present application is shown.

[0164] As Figure 4 shown, the optical lens comprises, in order from the first side to the second 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.

[0165] The first lens L1 is a meniscus lens with negative optical power, the first side S1 of which is convex, and the second side S2 of which is concave. The second lens L2 is a meniscus lens with negative optical power, the first side S3 of which is concave, and the second side S4 of which is convex. The third lens L3 is a meniscus lens with positive optical power, the first side S5 of which is convex, and the second side S6 of which is concave. The fourth lens L4 is a double convex lens with positive optical power, the first side S7 of which is convex, and the second side S8 of which is convex. The fifth lens L5 is a meniscus lens with positive optical power, the first side S10 of which is convex, and the second side S11 of which is concave.

[0166] The optical lens can further comprise a stop STO, which can be disposed between the fourth lens L4 and the fifth lens L5. For example, the stop STO can be disposed close to the second side S8 of the fourth lens L4.

[0167] Exemplarily, the optical lens can further comprise two auxiliary lenses L6 and L7 with no optical power, the auxiliary lens L6 can have a first side S12 and a second side S13, and the auxiliary lens L7 can have a first side S14 and a second side S15. Optionally, the auxiliary lenses L6 and L7 can be a filter or a protective glass. The filter can be used to correct color deviation. The protective glass can be used to protect the image sensor chip IMA located at the imaging surface S16.

[0168] The optical lens provided by the present application can be used as, for example, a vehicle-mounted lens, at this time, light from an object sequentially passes through each surface S1 to S15 and is finally imaged on the imaging surface S16 disposed on the second side, wherein the imaging surface S16 is provided with an image sensor chip IMA. It should be understood that the optical lens provided by the present application can also be used as, for example, a projection lens or a laser radar transmitting end lens, at this time, light from an image source side sequentially passes through each surface S15 to S1 and is finally projected onto a projection surface (not shown) disposed on the first side, wherein the image source surface is provided with an image sensor chip IMA.

[0169] Table 7 shows the central radius of curvature R, thickness / space d, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 4. Table 8 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 4, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0170]

[0171] Table 7

[0172] Face number k A4 A6 A8 A10 A12 S3 -3.206E+01 -1.043E-04 3.049E-07 -1.586E-09 2.416E-13 8.141E-15 S4 -1.755E+02 -8.009E-05 3.910E-07 -1.842E-09 4.732E-12 -3.909E-15 S10 -5.498E-01 4.462E-05 1.387E-07 1.116E-08 -1.287E-10 7.399E-13 S11 2.582E-01 1.211E-04 4.641E-06 -1.690E-07 6.181E-09 -9.136E-11

[0173] Table 8

[0174] Example 5

[0175] The following is for reference Figure 5 An optical lens according to Embodiment 5 of this application is described. Figure 5 A schematic diagram of the structure of an optical lens according to Embodiment 5 of this application is shown.

[0176] like Figure 5 As shown, the optical lens includes, in sequence from the first side to the second 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.

[0177] The first lens L1 is a meniscus lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a meniscus lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 is a meniscus lens with positive optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 is a meniscus lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a biconvex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex.

[0178] The optical lens may also include an aperture stop STO, which may be positioned between the fourth lens L4 and the fifth lens L5. For example, the aperture stop STO may be positioned close to the second side S8 of the fourth lens L4.

[0179] Exemplarily, the optical lens may further include auxiliary lenses L6 and L7 with no optical power. Auxiliary lens L6 may have a first side surface S12 and a second side surface S13, and auxiliary lens L7 may have a first side surface S14 and a second side surface S15. Optionally, auxiliary lenses L6 and L7 may be filters or protective glass. Filters may be used to correct color aberrations. Protective glass may be used to protect the image sensor chip IMA located at the imaging surface S16.

[0180] The optical lens provided in the application can be used as, for example, a vehicle-mounted lens, in which case light from an object sequentially passes through each surface S1 to S15 and is finally imaged on an imaging surface S16 arranged on the second side, wherein the imaging surface S16 is provided with an image sensing chip IMA. It should be understood that the optical lens provided in the application can also be used as, for example, a projection lens or a laser radar transmitting end lens, in which case light from an image source side sequentially passes through each surface S15 to S1 and is finally projected onto a projection surface (not shown) arranged on the first side, wherein the image source surface is provided with an image sensing chip IMA.

[0181] Table 9 shows the central curvature radius R, thickness / interval d, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 5. Table 10 shows the conic coefficient and high-order term coefficient that can be used for each aspherical surface of Example 5, wherein each aspherical surface can be defined by the formula (1) given in Example 1 above.

[0182]

[0183]

[0184] Table 9

[0185] Face number k A4 A6 A8 A10 A12 S3 -7.091E+01 -7.578E-05 5.470E-07 -1.302E-09 6.364E-13 3.528E-15 S4 -1.755E+02 -5.153E-05 4.923E-07 -1.807E-09 4.403E-12 -3.919E-15 S10 -8.998E+00 1.926E-04 -3.202E-06 1.588E-08 -1.900E-11 -2.180E-13 S11 -6.334E+01 -9.473E-05 9.376E-07 -8.276E-09 -2.706E-11 1.463E-13

[0186] Table 10

[0187] Example 6

[0188] The following refers to Figure 6 An optical lens according to Example 6 of the application is described. Figure 6 A structural schematic diagram of the optical lens according to Example 6 of the application is shown.

[0189] As Figure 6 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5 along the optical axis from the first side to the second side.

[0190] The first lens L1 is a meniscus lens with negative optical power, the first side surface S1 of which is a convex surface and the second side surface S2 of which is a concave surface. The second lens L2 is a meniscus lens with negative optical power, the first side surface S3 of which is a concave surface and the second side surface S4 of which is a convex surface. The third lens L3 is a meniscus lens with positive optical power, the first side surface S5 of which is a convex surface and the second side surface S6 of which is a concave surface. The fourth lens L4 is a meniscus lens with positive optical power, the first side surface S7 of which is a convex surface and the second side surface S8 of which is a concave surface. The fifth lens L5 is a double convex lens with positive optical power, the first side surface S10 of which is a convex surface and the second side surface S11 of which is a convex surface.

[0191] The optical lens can further include a stop STO, which can be disposed between the fourth lens L4 and the fifth lens L5. For example, the stop STO can be disposed close to the second side S8 of the fourth lens L4.

[0192] Exemplarily, the optical lens can further include two auxiliary lenses L6 and L7 with no optical power, the auxiliary lens L6 can have a first side S12 and a second side S13, and the auxiliary lens L7 can have a first side S14 and a second side S15. Optionally, the auxiliary lenses L6 and L7 can be a filter or a protective glass. The filter can be used to correct color deviation. The protective glass can be used to protect the image sensor chip IMA located at the imaging surface S16.

[0193] The optical lens provided by the present application can be used as, for example, a vehicle-mounted lens, in which case the light from the object sequentially passes through each surface S1 to S15 and is finally imaged on the imaging surface S16 disposed on the second side, wherein the imaging surface S16 is provided with an image sensor chip IMA. It should be understood that the optical lens provided by the present application can also be used as, for example, a projection lens or a laser radar transmitting end lens, in which case the light from the image source side sequentially passes through each surface S15 to S1 and is finally projected onto the projection surface (not shown) disposed on the first side, wherein the image source surface is provided with an image sensor chip IMA.

[0194] Table 11 shows the center curvature radius R, thickness / interval d, refractive index Nd and Abbe number Vd of each lens of the optical lens of embodiment 6. Table 12 shows the conic coefficient and high-order term coefficient that can be used for each aspherical surface of embodiment 6, wherein each aspherical surface can be defined by the formula (1) given in embodiment 1 above.

[0195]

[0196]

[0197] Table 11

[0198] Face number k A4 A6 A8 A10 A12 S3 -7.040E+01 -7.579E-05 5.471E-07 -1.302E-09 6.389E-13 3.545E-15 S4 -1.755E+02 -5.149E-05 4.924E-07 -1.806E-09 4.403E-12 -3.922E-15 S10 -8.952E+00 1.931E-04 -3.194E-06 1.584E-08 -1.965E-11 -2.232E-13 S11 -5.977E+01 -9.530E-05 9.330E-07 -8.306E-09 -2.731E-11 1.437E-13

[0199] Table 12

[0200] Example 7

[0201] The following refers to Figure 7 An optical lens according to embodiment 7 of the present application is described. Figure 7 A structural schematic diagram of the optical lens according to embodiment 7 of the present application is shown.

[0202] As shown in Figure 7 the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5 along the optical axis from the first side to the second side.

[0203] The first lens L1 is a meniscus lens with negative refractive power, the first side S1 is convex, and the second side S2 is concave. The second lens L2 is a meniscus lens with negative refractive power, the first side S3 is concave, and the second side S4 is convex. The third lens L3 is a meniscus lens with positive refractive power, the first side S5 is convex, and the second side S6 is concave. The fourth lens L4 is a double convex lens with positive refractive power, the first side S7 is convex, and the second side S8 is convex. The fifth lens L5 is a double convex lens with positive refractive power, the first side S10 is convex, and the second side S11 is convex. The first side S10 and the second side S11 of the fifth lens L5 have at least one inflection point. Specifically, the first side S10 of the fifth lens is convex in the paraxial region, and the second side S11 is convex in the paraxial region. The first side S10 of the fifth lens is concave in the circumferential region, and the second side S11 is convex in the circumferential region.

[0204] The optical lens can further include a stop STO, which can be disposed between the fourth lens L4 and the fifth lens L5. For example, the stop STO can be disposed close to the second side S8 of the fourth lens L4.

[0205] Exemplarily, the optical lens can further include two auxiliary lenses L6 and L7 with no refractive power, the auxiliary lens L6 can have a first side S12 and a second side S13, and the auxiliary lens L7 can have a first side S14 and a second side S15. Optionally, the auxiliary lenses L6 and L7 can be a filter or a protective glass. The filter can be used to correct color deviation. The protective glass can be used to protect the image sensor chip IMA located at the imaging surface S16.

[0206] The optical lens provided by the present application can be used as, for example, a vehicle-mounted lens, at which time the light from the object sequentially passes through each surface S1 to S15 and is finally imaged on the imaging surface S16 disposed on the second side, wherein the imaging surface S16 is provided with an image sensor chip IMA. It should be understood that the optical lens provided by the present application can also be used as, for example, a projection lens or a laser radar transmitting end lens, at which time the light from the image source side sequentially passes through each surface S15 to S1 and is finally projected onto the projection surface (not shown) disposed on the first side, wherein the image source surface is provided with an image sensor chip IMA.

[0207] Table 13 shows the center curvature radius R, thickness / interval d, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 7. Table 14 shows the conic coefficient and high-order term coefficient that can be used for each aspheric surface in Example 7, wherein each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0208]

[0209] Table 13

[0210] Face number k A4 A6 A8 A10 A12 S3 -2.577E+01 -1.035E-04 2.890E-07 -1.635E-09 5.659E-13 2.103E-14 S4 -1.755E+02 -8.133E-05 4.001E-07 -1.789E-09 4.969E-12 -2.272E-15 S10 -2.004E+01 1.641E-04 -3.110E-06 1.722E-08 -1.143E-11 -3.694E-13 S11 -2.619E+02 -7.130E-05 -4.137E-08 -1.404E-08 1.843E-10 -8.106E-13

[0211] Table 14

[0212] Example 8

[0213] The following is for reference Figure 8 An optical lens according to Embodiment 8 of this application is described. Figure 8 A schematic diagram of the structure of an optical lens according to Embodiment 8 of this application is shown.

[0214] like Figure 8 As shown, the optical lens includes, in sequence from the first side to the second 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.

[0215] The first lens L1 is a meniscus lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a meniscus lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 is a meniscus lens with positive optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 is a biconvex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a biconvex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The first side surface S10 and the second side surface S11 of the fifth lens L5 have at least one inflection point. Specifically, the first side surface S10 of the fifth lens is convex in the paraxial region, and the second side surface S11 is convex in the paraxial region. The first side surface S10 of the fifth lens is concave in the circumferential region, and the second side surface S11 is convex in the circumferential region.

[0216] The optical lens may also include an aperture stop STO, which may be positioned between the fourth lens L4 and the fifth lens L5. For example, the aperture stop STO may be positioned close to the second side S8 of the fourth lens L4.

[0217] Exemplarily, the optical lens may further include auxiliary lenses L6 and L7 with no optical power. Auxiliary lens L6 may have a first side surface S12 and a second side surface S13, and auxiliary lens L7 may have a first side surface S14 and a second side surface S15. Optionally, auxiliary lenses L6 and L7 may be filters or protective glass. Filters may be used to correct color aberrations. Protective glass may be used to protect the image sensor chip IMA located at the imaging surface S16.

[0218] The optical lens provided in the present application can be used as, for example, a vehicle-mounted lens, in which case light from an object sequentially passes through each surface S1 to S15 and is finally imaged on an imaging surface S16 arranged on the second side, wherein the imaging surface S16 is provided with an image sensing chip IMA. It should be understood that the optical lens provided in the present application can also be used as, for example, a projection lens or a laser radar transmitting end lens, in which case light from an image source side sequentially passes through each surface S15 to S1 and is finally projected onto a projection surface (not shown) arranged on the first side, wherein the image source surface is provided with an image sensing chip IMA.

[0219] Table 15 shows the central curvature radius R, thickness / interval d, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 8. Table 16 shows the conic coefficient and high-order term coefficient that can be used for each aspherical surface of Example 8, wherein each aspherical surface can be defined by the formula (1) given in Example 1 above.

[0220]

[0221] Table 15

[0222] Face number k A4 A6 A8 A10 A12 S3 -2.574E+01 -1.035E-04 2.890E-07 -1.635E-09 5.640E-13 2.102E-14 S4 -1.755E+02 -8.133E-05 4.001E-07 -1.789E-09 4.968E-12 -2.273E-15 S10 -2.004E+01 1.641E-04 -3.110E-06 1.722E-08 -1.143E-11 -3.694E-13 S11 -2.723E+02 -7.131E-05 -4.149E-08 -1.404E-08 1.843E-10 -8.125E-13

[0223] Table 16

[0224] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Table 17 below. In Table 17, the units of TTL, F, F1, F2, F3, F4, F5, DMAX, EPD, D, D1, D2, D4, H, SAG31, SAG32, D31, D32 and BFL are millimeters (mm), and the unit of FOV is degree (°).

[0225]

[0226]

[0227] Table 17

[0228] The present application also provides an electronic device, which can include the optical lens according to the above 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 can be a separate electronic device such as a distance detection camera, or an imaging module integrated on a distance detection device such as an auxiliary driving system. In addition, the electronic device can also be a separate imaging device such as a vehicle-mounted camera, or an imaging module integrated on an auxiliary driving system.

[0229] The above description is only the preferred embodiment of the present application and the explanation of the technical principles. It should be understood by those skilled in the art that the scope of the protection of the present application is not limited to the technical solutions formed by the specific combinations of the above technical features. It should also cover other technical solutions formed by the combinations of the above technical features or their equivalent features without departing from the concept of the present application. For example, the technical solutions formed by the mutual replacements of the above features and the technical features disclosed in the present application (but not limited to) with similar functions.

Claims

1. An optical lens characterized in that, In order from the first side to the second side along the optical axis, the optical lens comprises: a first lens with negative refractive power, a first side of which is convex and a second side of which is concave; a second lens with negative refractive power, a first side of which is concave and a second side of which is convex; a third lens with positive refractive power, a first side of which is convex and a second side of which is concave; a fourth lens with positive refractive power, a first side of which is convex; and a fifth lens with positive refractive power, a first side of which is convex; wherein the number of lenses with refractive power in the optical lens is five; the first side is a side close to an object, and the second side is a side opposite to the first side; a central radius of curvature R6 of the second side of the third lens and a central radius of curvature R7 of the first side of the fourth lens satisfy: 0.642≤|(R6-R7) / (R6+R7)|≤1.5; a total length TTL of the optical lens and a total effective focal length F of the optical lens satisfy: 3.622≤TTL / F≤4.

5.

2. The optical lens of claim 1, wherein, the second side of the fourth lens is concave.

3. The optical lens of claim 1, wherein, the second side of the fourth lens is convex.

4. The optical lens of claim 1, wherein, the second side of the fifth lens is concave.

5. The optical lens of claim 1, wherein, the second side of the fifth lens is convex.

6. The optical lens of any of claims 1-5, wherein, a total length TTL of the optical lens and a total effective focal length F of the optical lens satisfy: 3.622≤TTL / F≤4.

7. The optical lens of any of claims 1-5, wherein, a maximum entrance pupil diameter EPD of the optical lens and a maximum entrance pupil diameter D of the first side of the first lens satisfy: 0.04≤D / H / FOV×1°≤0.

3.

8. The optical lens of any of claims 1-5, wherein, a maximum entrance pupil diameter EPD of the optical lens and a maximum entrance pupil diameter D of the first side of the first lens satisfy: 1≤D / H / tan(FOV)≤7.

9. The optical lens of any of claims 1-5, wherein, a total length TTL of the optical lens and a maximum value DMAX of the maximum entrance pupil half diameter of the first side of the first lens to the maximum entrance pupil half diameter of the second side of the fifth lens satisfy: 3≤TTL / DMAX≤4.

5.

10. The optical lens of any of claims 1-5, wherein, a maximum entrance pupil diameter EPD of the optical lens and a maximum value DMAX of the maximum entrance pupil half diameter of the first side of the first lens to the maximum entrance pupil half diameter of the second side of the fifth lens satisfy: 1.2≤EPD / DMAX≤2.

11. The optical lens of any of claims 1-5, wherein, a total effective focal length F of the optical lens and a maximum entrance pupil diameter EPD of the optical lens satisfy: 0.6≤F / EPD≤0.

8.

12. The optical lens of any of claims 1-5, wherein, a maximum entrance pupil diameter D of the first side of the first lens corresponding to a maximum field of view of the optical lens, an image height H corresponding to the maximum field of view of the optical lens, and a total effective focal length F of the optical lens satisfy: 0.05mm -1 ≤ D / H / F ≤ 0.25mm -1 .

13. The optical lens of any of claims 1-5, wherein, a maximum value D1 of the maximum entrance pupil half diameter of the first side of the first lens and the maximum entrance pupil half diameter of the second side of the first lens and a maximum value D2 of the maximum entrance pupil half diameter of the first side of the second lens and the maximum entrance pupil half diameter of the second side of the second lens satisfy: 0.237≤|D1-D2|≤3.

14. The optical lens of any of claims 1-5, wherein, The maximum value D4 in the maximum half light passing radius of the first side of the fourth lens and the maximum half light passing radius of the second side of the fourth lens and the maximum value D2 in the maximum half light passing radius of the first side of the second lens and the maximum half light passing radius of the second side of the second lens satisfy: 1.097≤D4 / D2≤1.

2.

15. The optical lens of any of claims 1-5, wherein, The central thickness d2 of the second lens, the interval distance d23 of the second lens and the third lens on the optical axis, the central thickness d3 of the third lens, the interval distance d34 of the third lens and the fourth lens on the optical axis, and the central thickness d4 of the fourth lens satisfy: 1.045≤(d2+d23+d3+d34+d4) / (d2+d3+d4)≤2.

16. The optical lens of any of claims 1-5, wherein, The interval distance d45 of the fourth lens and the fifth lens on the optical axis and the central thickness d5 of the fifth lens satisfy: 1.186≥d45 / d5≥0.

5.

17. The optical lens of any of claims 1-5, wherein, The central curvature radius R1 of the first side of the first lens and the central curvature radius R2 of the second side of the first lens satisfy: 1≤R1 / R2≤2.

18. The optical lens of any of claims 1-5, wherein, The effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: -15≤F2 / F≤-4.

19. The optical lens of any of claims 1-5, wherein, The central curvature radius R4 of the second side of the second lens and the central curvature radius R5 of the first side of the third lens satisfy: 0.157≤|(|R4|-R5) / (|R4|+R5)|≤1.

20. The optical lens of any of claims 1-5, wherein, The sagittal height SAG31 of the first side of the third lens, the maximum half light passing radius D31 of the first side of the third lens, the sagittal height SAG32 of the second side of the third lens, and the maximum half light passing radius D32 of the second side of the third lens satisfy: 4.097≥(SAG31 / D31) / (SAG32 / D32)≥1.

5.

21. The optical lens of any of claims 1-5, wherein, The effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy: 2≤F3 / F≤7.

22. The optical lens of any of claims 1-5, wherein, The central curvature radius R6 of the second side of the third lens and the central curvature radius R7 of the first side of the fourth lens satisfy: 0.642≤|(R6-R7) / (R6+R7)|≤1.

23. The optical lens of any of claims 1-5, wherein, The central curvature radius R7 of the first side of the fourth lens and the central curvature radius R8 of the second side of the fourth lens satisfy: 0.492≥|R7 / R8|≥0.

15.

24. The optical lens of any of claims 1-5, wherein, The effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy: 1≤F4 / F≤4.

25. The optical lens of any of claims 1-5, wherein, The effective focal length F5 of the fifth lens and the total effective focal length F of the optical lens satisfy: 0.5≤F5 / F≤4.

26. The optical lens of any of claims 1-5, wherein, The effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens satisfy: 0.978≤|F4 / F5|≤3.

27. The optical lens of any of claims 1-5, wherein, The back focal length BFL of the optical lens and the total length TTL of the optical lens satisfy: 0.106≥BFL / TTL≥0.

05.

28. The optical lens of any of claims 1-5, wherein, The first side and / or the second side of the fifth lens has at least one inflection point.

29. An electronic device, comprising: An optical lens according to any one of claims 1-28 and an imaging element for converting an optical image formed by the optical lens into an electric signal.

Images