An optical lens

Abstract

The application discloses an optical lens which comprises, in order from the object side to the image side along the optical axis, a first lens with negative refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, a seventh lens with positive refractive power, an eighth lens with positive refractive power, a ninth lens with negative refractive power, a tenth lens with positive refractive power, and an eleventh lens with refractive power.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to an optical lens. Background Technology

[0002] With the rapid development and widespread application of optical lenses, people's requirements for wide-angle surveillance lenses are constantly increasing. Today's wide-angle lenses are constantly developing towards a wider angle of view and stronger temperature adaptability, and correspondingly, new architectures of wide-angle lenses urgently need to be researched and developed.

[0003] However, most ultra-wide-angle lenses currently on the market use plastic aspherical lenses to achieve the desired effect, but plastic materials have drawbacks such as easy aging and unstable performance at high and low temperatures. In addition, most existing ultra-wide-angle lenses suffer from insufficient image quality. Therefore, the market urgently needs a lens that can meet the requirements of ultra-wide-angle, high resolution, and no blurring at high and low temperatures. Summary of the Invention

[0004] This application provides an optical lens that, along the optical axis from the object side to the image side, may sequentially include: a first lens having negative optical power; a second lens having negative optical power; a third lens having negative optical power; a fourth lens having positive optical power; a fifth lens having negative optical power; a sixth lens having positive optical power; a seventh lens having positive optical power; an eighth lens having positive optical power; a ninth lens having negative optical power; a tenth lens having positive optical power; and an eleventh lens having optical power.

[0005] In one embodiment, the object-side surface of the first lens is convex, and the image-side surface is concave.

[0006] In one embodiment, the object-side surface of the second lens is convex, and the image-side surface is concave.

[0007] In one embodiment, the object-side surface of the third lens is concave, and the image-side surface is also concave.

[0008] In one embodiment, the object-side surface of the fourth lens is convex, and the image-side surface is concave.

[0009] In one embodiment, the object-side surface of the fifth lens is concave, and the image-side surface is convex.

[0010] In one embodiment, the object-side surface of the sixth lens is concave, and the image-side surface is convex.

[0011] In one embodiment, the object-side surface of the seventh lens is convex, and the image-side surface is also convex.

[0012] In one embodiment, the object-side surface of the eighth lens is convex, and the image-side surface is also convex.

[0013] In one embodiment, the object-side surface of the ninth lens is concave, and the image-side surface is also concave.

[0014] In one embodiment, the object-side surface of the tenth lens is convex, and the image-side surface is also convex.

[0015] In one embodiment, the object-side surface of the eleventh lens is concave, and the image-side surface is convex.

[0016] In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the optical lens can satisfy: -5.5≤f1 / f≤-2.8.

[0017] In one embodiment, the effective focal length f2 of the second lens and the total effective focal length f of the optical lens can satisfy: -2.5≤f2 / f≤-1.5.

[0018] In one embodiment, the effective focal length f3 of the third lens and the total effective focal length f of the optical lens can satisfy: -6.5≤f3 / f≤-3.5.

[0019] In one embodiment, the effective focal length f4 of the fourth lens and the total effective focal length f of the optical lens can satisfy: 2.5≤f4 / f≤5.5.

[0020] In one embodiment, the effective focal length f5 of the fifth lens and the total effective focal length f of the optical lens can satisfy: -3.0≤f5 / f≤-1.0.

[0021] In one embodiment, the effective focal length f6 of the sixth lens and the total effective focal length f of the optical lens can satisfy: 1.5≤f6 / f≤4.0.

[0022] In one embodiment, the effective focal length f7 of the seventh lens and the total effective focal length f of the optical lens can satisfy: 2.0≤f7 / f≤3.0.

[0023] In one embodiment, the effective focal length f8 of the eighth lens and the total effective focal length f of the optical lens can satisfy: 1.5≤f8 / f≤2.5.

[0024] In one embodiment, the effective focal length f9 of the ninth lens and the total effective focal length f of the optical lens can satisfy: -1.5≤f9 / f≤-1.0.

[0025] In one embodiment, the effective focal length f10 of the tenth lens and the total effective focal length f of the optical lens can satisfy: 2.0≤f10 / f≤3.5.

[0026] In one embodiment, the effective focal length f11 of the eleventh lens and the total effective focal length f of the optical lens can satisfy: -20≤f11 / f≤20.

[0027] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens can satisfy: 1.0≤f1 / f2≤3.0.

[0028] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens can satisfy: 0.5≤f1 / f3≤1.5.

[0029] In one embodiment, the combined focal length fa of the first lens to the sixth lens and the total effective focal length f of the optical lens can satisfy: -2.0≤fa / f≤-1.0.

[0030] In one embodiment, the combined focal length fb of the seventh to eleventh lenses and the total effective focal length f of the optical lens can satisfy: 1.5 ≤ fb / f ≤ 2.5.

[0031] In one embodiment, the distance TTL from the object side of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length f of the optical lens can satisfy: 7.0≤TTL / f≤9.5.

[0032] In one embodiment, the maximum imaging element D of the optical lens and the total effective focal length f of the optical lens can satisfy: 1.0≤D / f≤2.0.

[0033] In one embodiment, the distance M1 from the object side of the first lens to the aperture stop of the optical lens on the optical axis and the distance TTL from the object side of the first lens to the imaging surface of the optical lens on the optical axis can satisfy: 0.35≤M1 / TTL≤0.45.

[0034] In one embodiment, the center thickness CT4 of the fourth lens on the optical axis and the center thickness CT6 of the sixth lens on the optical axis can satisfy: 0.5≤CT4 / CT6≤1.5.

[0035] In one embodiment, the center thickness CT10 of the tenth lens on the optical axis and the center thickness CT11 of the eleventh lens on the optical axis can satisfy: 1.0≤CT10 / CT11≤2.0.

[0036] The optical lens of this application uses eleven lenses. By reasonably setting the parameters such as the optical power, surface shape, and center thickness of each lens, the lens can have at least one beneficial effect such as a large field of view, high resolution, and no defocusing at high and low temperatures. Attached Figure Description

[0037] Other features, objects, and advantages of this application will become more apparent from the following detailed description of the embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0038] Figure 1 This is a schematic diagram of the structure of an optical lens according to Embodiment 1 of this application;

[0039] Figure 2 This is a schematic diagram of the structure of an optical lens according to Embodiment 2 of this application;

[0040] Figure 3 This is a schematic diagram of the structure of an optical lens according to Embodiment 3 of this application; and

[0041] Figure 4 This is a schematic diagram of the structure of an optical lens according to Embodiment 4 of this application. Detailed Implementation

[0042] To facilitate understanding of this application, a more complete description of the application will be provided below with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0043] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0044] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0045] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity 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 location of the concaveness 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 subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging side is called the image-side surface of the lens.

[0046] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0047] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0048] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] The features, principles and other aspects of this application are described in detail below.

[0050] In an exemplary embodiment, the optical lens includes, for example, eleven lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens. These eleven lenses are arranged sequentially along the optical axis from the object side to the image side.

[0051] In an exemplary embodiment, the first lens may have negative optical power; the second lens may have negative optical power; the third lens may have negative optical power; the fourth lens may have positive optical power; the fifth lens may have negative optical power; the sixth lens may have positive optical power; the seventh lens may have positive optical power; the eighth lens may have positive optical power; the ninth lens may have negative optical power; the tenth lens may have positive optical power; and the eleventh lens may have either positive or negative optical power. This setting of the optical power of each lens included in the optical lens of this application is beneficial for the lens to achieve high resolution and non-defocusing characteristics at high and low temperatures while satisfying a large field of view.

[0052] In an exemplary embodiment, the first lens may have negative optical power. The first lens may have a convex-concave surface. The convex-concave surface of the first lens allows for a smaller angle of incidence of light on the object side of the first lens, enabling light to smoothly reach the rear optical system. This facilitates a large field of view and is more beneficial for correcting aberrations in the rear optical system.

[0053] In an exemplary embodiment, the second lens may have negative optical power. The second lens may have a convex-concave surface. The negative optical power of the second lens can share the optical power of the first lens, which helps to reduce chromatic aberration at the edges of the field of view and improve the resolution of the edge field of view.

[0054] In an exemplary embodiment, the third lens may have negative optical power. The third lens may have a concave-convex shape. The concave-convex shape of the third lens can further reduce the size of large-angle light rays, can share some of the negative optical power of the first lens, and is more conducive to distortion correction.

[0055] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a convex-concave surface. The convex-concave surface of the fourth lens is advantageous for further reducing the incident angle of light in the outer field of view, and is beneficial for correcting image plane curvature.

[0056] In an exemplary embodiment, the fifth lens may have negative optical power. The fifth lens may have a concave-convex surface. A concave-convex surface on the fifth lens is beneficial for correcting spherical and chromatic aberrations, and for enabling the lens to achieve larger aperture requirements; for example, the lens's aperture value FNO may satisfy FNO≤1.8.

[0057] In an exemplary embodiment, the sixth lens may have positive optical power. The sixth lens may have a concave-convex surface. The concave-convex surface of the sixth lens is beneficial for correcting spherical aberration and chromatic aberration, and allows the lens to achieve larger aperture requirements; for example, the aperture value FNO of the lens may satisfy FNO≤1.8.

[0058] In an exemplary embodiment, the seventh lens may have positive optical power. The seventh lens may have a convex-convex shape. The convex-convex shape of the seventh lens is beneficial for correcting spherical aberration and chromatic aberration, and allows the lens to achieve larger aperture requirements; for example, the aperture value FNO of the lens may satisfy FNO≤1.8.

[0059] In an exemplary embodiment, the eighth lens may have positive optical power. The eighth lens may have a convex-convex surface. The eighth lens has positive optical power and can share the optical power of the seventh lens. The convex-convex surface of the eighth lens is conducive to a smooth light transition in order to achieve a large target surface size.

[0060] In an exemplary embodiment, the ninth lens may have negative optical power. The ninth lens may have a concave-convex shape. The concave-convex shape of the ninth lens is beneficial for correcting chromatic aberration, thereby improving resolution.

[0061] In an exemplary embodiment, the tenth lens may have a positive focal power. The tenth lens may have a convex-convex surface type. Such a setting of the tenth lens is conducive to the gentle transition of light rays to reduce the lens CRA.

[0062] In an exemplary embodiment, the eleventh lens may have a positive or negative focal power. The eleventh lens may have a concave-convex surface type. The use of the concave-convex surface type for the eleventh lens is conducive to the correction of off-axis field aberrations and can better meet the imaging quality requirements.

[0063] In an exemplary embodiment, the optical lens according to the present application may further include an aperture, and the aperture may be located, for example, between the sixth lens and the seventh lens. It should be noted that the position of the aperture disclosed here is only an example and not a limitation; in an alternative embodiment, the aperture may also be set at other positions according to actual needs.

[0064] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the imaging surface. Optionally, the photosensitive element disposed on the imaging surface may be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) element.

[0065] In an exemplary embodiment, the optical lens may include a cemented lens group. For example, in one embodiment, the fifth lens and the sixth lens may be cemented to form a doublet lens group, and the eighth lens and the ninth lens may be cemented to form a doublet lens group. In another embodiment, the eighth lens and the ninth lens may be cemented to form a doublet lens group. In yet another embodiment, the eighth lens, the ninth lens, and the tenth lens may be cemented to form a triplet lens group. The setting of the cemented lens group can be conducive to correcting chromatic aberration and improving imaging quality; at the same time, it is conducive to reducing the sensitivity of the system tolerance.

[0066] In an exemplary embodiment, at least one of the lenses included in the optical lens may be an aspherical lens. For example, in one embodiment, the second lens, the fourth lens, the seventh lens, and the eleventh lens may be lenses with aspherical surfaces.

[0067] The optical lens according to the exemplary embodiment of the present application can achieve high resolution and no defocus at high and low temperatures while satisfying a large field of view. In an exemplary embodiment, the maximum field of view angle FOV of the lens can reach 160° (for example, 155° < FOV < 165°); the lens can maintain high-definition image quality in the temperature range from -40°C to 85°C; the resolution of the lens can be as high as 35 million pixels.

[0068] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: -5.5 ≤ f1 / f ≤ -2.8, where f1 is the effective focal length of the first lens and f is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the first lens to the total effective focal length of the optical lens within this range, it helps to make the change in the incident light refraction angle more gradual, avoiding excessive aberrations caused by overly strong refraction changes, and at the same time, it helps more light to enter the rear optical system, increasing illumination.

[0069] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: -2.5 ≤ f2 / f ≤ -1.5, where f2 is the effective focal length of the second lens and f is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the second lens to the total effective focal length of the optical lens within this range, it is beneficial to make the light path smooth and to help balance various aberrations.

[0070] In an exemplary embodiment, the optical lens according to this application satisfies: -6.5 ≤ f3 / f ≤ -3.5, where f3 is the effective focal length of the third lens and f is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the third lens to the total effective focal length of the optical lens within this range, the focal length configuration can be balanced, which helps to smooth the light transition and correct chromatic aberration.

[0071] In an exemplary embodiment, the optical lens according to this application satisfies: 2.5 ≤ f4 / f ≤ 5.5, where f4 is the effective focal length of the fourth lens and f is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the fourth lens to the total effective focal length of the optical lens within this range, it is beneficial for light to enter the rear optical system smoothly, to compensate for the spherical aberration introduced by the first three lenses, and to further correct the aberrations generated by the front lens group.

[0072] In an exemplary embodiment, the optical lens according to this application satisfies: -3.0 ≤ f5 / f ≤ -1.0, where f5 is the effective focal length of the fifth lens and f is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the fifth lens to the total effective focal length of the optical lens within this range, it helps to balance various aberrations.

[0073] In an exemplary embodiment, the optical lens according to this application satisfies: 1.5 ≤ f6 / f ≤ 4.0, where f6 is the effective focal length of the sixth lens and f is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the sixth lens to the total effective focal length of the optical lens within this range, it is beneficial to ensure a smooth transition of light at the sixth lens, thereby improving the resolving quality of the optical lens.

[0074] In an exemplary embodiment, the optical lens according to this application satisfies: 2.0 ≤ f7 / f ≤ 3.0, where f7 is the effective focal length of the seventh lens and f is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the seventh lens to the total effective focal length of the optical lens within this range, it is beneficial to correct chromatic aberration and balance the lens performance under high and low temperature conditions. For example, it can enable the lens to maintain high-definition image quality within a temperature range of -40°C to 85°C.

[0075] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: 1.5 ≤ f8 / f ≤ 2.5, where f8 is the effective focal length of the eighth lens and f is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the eighth lens to the total effective focal length of the optical lens within this range, it is beneficial to improve image quality, reduce light energy reflection loss, thereby achieving high resolution and improving the clarity of the lens image.

[0076] In an exemplary embodiment, the optical lens according to this application satisfies: -1.5 ≤ f9 / f ≤ -1.0, where f9 is the effective focal length of the ninth lens and f is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the ninth lens to the total effective focal length of the optical lens within this range, it is possible to facilitate a smooth transition of light and reduce lens sensitivity.

[0077] In an exemplary embodiment, the optical lens according to this application satisfies: 2.0 ≤ f10 / f ≤ 3.5, where f10 is the effective focal length of the tenth lens and f is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the tenth lens to the total effective focal length of the optical lens within this range, the defocusing caused by the front negative power lens under high and low temperature conditions can be reduced.

[0078] In an exemplary embodiment, the optical lens according to this application satisfies: -20≤f11 / f≤20, where f11 is the effective focal length of the eleventh lens and f is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the eleventh lens to the total effective focal length of the optical lens within this range, it is beneficial to ensure that light enters the image plane smoothly, to concentrate the defocus curve, and to improve resolution.

[0079] In an exemplary embodiment, the optical lens according to this application satisfies: 1.0 ≤ f1 / f2 ≤ 3.0, where f1 is the effective focal length of the first lens and f2 is the effective focal length of the second lens. By controlling the ratio of the effective focal length of the first lens to the effective focal length of the second lens within this range, the optical power of the first lens and the second lens is reasonably distributed, which helps to reduce chromatic aberration in the edge field of view and improve the resolution of the edge field of view.

[0080] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: 0.5 ≤ f1 / f3 ≤ 1.5, where f1 is the effective focal length of the first lens and f3 is the effective focal length of the third lens. By controlling the ratio of the effective focal length of the first lens to the effective focal length of the third lens within this range, the optical power of the first and third lenses is reasonably allocated, which is more conducive to distortion correction.

[0081] In an exemplary embodiment, the optical lens according to this application satisfies the condition -2.0 ≤ fa / f ≤ -1.0, where fa is the combined focal length of the first to sixth lenses, and the first, second, third, fourth, fifth, and sixth lenses constitute the front lens group of the lens; fa is the focal length value of the front lens group; and f is the total effective focal length of the optical lens. By controlling the combined focal length of the first to sixth lenses and the total effective focal length of the optical lens to satisfy the condition -2.0 ≤ fa / f ≤ -1.0, the optical power of the front lens group is reasonably allocated, which helps to reduce lens tolerance sensitivity and improve production yield.

[0082] In an exemplary embodiment, the optical lens according to this application satisfies the condition 1.5 ≤ fb / f ≤ 2.5, where fb is the combined focal length of the seventh to eleventh lenses, and the seventh, eighth, ninth, tenth, and eleventh lenses constitute the rear lens group of the lens; fb is the focal length value of the rear lens group; and f is the total effective focal length of the optical lens. By controlling the combined focal length of the seventh to eleventh lenses and the total effective focal length of the optical lens to satisfy the condition 1.5 ≤ fb / f ≤ 2.5, the optical power of the rear lens group is reasonably allocated, which helps to reduce lens tolerance sensitivity and improve production yield.

[0083] In an exemplary embodiment, the optical lens according to this application satisfies: 7.0 ≤ TTL / f ≤ 9.5, where TTL is the distance on the optical axis from the object-side surface of the first lens to the imaging surface of the optical lens, and f is the total effective focal length of the optical lens. By controlling the ratio of the distance on the optical axis from the object-side surface of the first lens to the imaging surface of the optical lens to the total effective focal length of the optical lens within this range, it is beneficial to achieve a small lens size and to miniaturize the lens.

[0084] In an exemplary embodiment, the optical lens according to this application satisfies: 1.0 ≤ D / f ≤ 2.0, where D is the maximum imaging element of the optical lens and f is the total effective focal length of the optical lens. By controlling the ratio of the maximum imaging element to the total effective focal length of the optical lens within this range, it is beneficial for imaging large target surfaces. For example, in one embodiment, the imaging target surface can reach 1 / 1.8".

[0085] In an exemplary embodiment, the optical lens includes, for example, an aperture stop located between the sixth and seventh lenses. The optical lens according to this application satisfies the following ratio: 0.35 ≤ M1 / TTL ≤ 0.45, where M1 is the distance on the optical axis from the object-side surface of the first lens to the aperture stop, and TTL is the distance on the optical axis from the object-side surface of the first lens to the imaging surface of the optical lens. By controlling the ratio of the distance on the optical axis from the object-side surface of the first lens to the aperture stop to the imaging surface of the optical lens to be within this range, lens miniaturization is advantageous.

[0086] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: 0.5 ≤ CT4 / CT6 ≤ 1.5, where CT4 is the center thickness of the fourth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis. By controlling the ratio of the center thickness of the fourth lens to the center thickness of the sixth lens on the optical axis within this range, it is beneficial to achieve a smooth light transition, improve product yield, and reduce production costs.

[0087] In an exemplary embodiment, the optical lens according to this application satisfies: 1.0 ≤ CT10 / CT11 ≤ 2.0, where CT10 is the center thickness of the tenth lens on the optical axis, and CT11 is the center thickness of the eleventh lens on the optical axis. By controlling the ratio of the center thickness of the tenth lens to the center thickness of the eleventh lens on the optical axis within this range, it is beneficial to achieve a smooth light transition and a better correction effect on image plane curvature.

[0088] In an exemplary embodiment, the optical lens of this application may further include a filter and / or protective glass disposed between the eleventh lens and the imaging plane, as needed. The filter can filter light with a specific wavelength, and the protective glass can prevent damage to the image-side elements (e.g., chips) of the optical lens.

[0089] The optical lens according to the embodiments of this application can employ multiple lens elements, such as the eleven elements described above. By rationally setting parameters such as the optical power, surface shape, and center thickness of each lens, and through the rational arrangement of the cemented lens group, an optical lens is provided that can satisfy at least one beneficial effect such as a large field of view, high resolution, and no defocusing at high and low temperatures.

[0090] The optical lens according to the embodiments of this application has a maximum field of view (FOV) of up to 160°, and can maintain high-definition image quality within a temperature range of -40°C to 85°C. In addition, the lens resolution can reach 35 million pixels.

[0091] However, those skilled in the art will understand that the number of lenses constituting the lens can be varied to obtain the various results and advantages described in this specification without departing from the technical solutions claimed in this application. For example, although eleven lenses have been described as an example in the embodiments, the optical lens is not limited to including eleven lenses. If desired, the optical lens may also include other numbers of lenses. Specific embodiments of the optical lens applicable to the above embodiments are further described below with reference to the accompanying drawings.

[0092] Example 1

[0093] Figure 1 This is a schematic diagram of the optical lens according to Embodiment 1 of this application, as shown below. Figure 1 The optical lens according to Embodiment 1 of this application is described.

[0094] like Figure 1 As shown, the optical lens, along the optical axis from the object side to the image side, sequentially includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an aperture stop STO, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11, a filter and / or protective glass CG, and an imaging plane IM. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented doublet lens group; the eighth lens L8 and the ninth lens L9 are cemented together to form a cemented doublet lens group.

[0095] In this embodiment, the first lens L1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S3 is convex, and its image-side surface S4 is concave. The third lens L3 has negative optical power, its object-side surface S5 is concave, and its image-side surface S6 is concave. The fourth lens L4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is concave. The fifth lens L5 has negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is convex. The sixth lens L6 has positive optical power, its object-side surface S10 is concave, and its image-side surface S11 is convex. The seventh lens L7 has positive optical power, its object-side surface S13 is convex, and its image-side surface S14 is convex. The eighth lens L8 has positive optical power, its object-side surface S15 is convex, and its image-side surface S16 is convex. The ninth lens L9 has negative optical power, with its object-side surface S16 being concave and its image-side surface S17 being concave. The tenth lens L10 has positive optical power, with its object-side surface S18 being convex and its image-side surface S19 being convex. The eleventh lens L11 has positive optical power, with its object-side surface S20 being concave and its image-side surface S21 being convex.

[0096] In this embodiment, the aperture stop STO of the optical lens is positioned between the sixth lens L6 and the seventh lens L7.

[0097] In this embodiment, the filter and / or protective glass CG located between the eleventh lens L11 and the imaging surface has an object-side surface S22 and an image-side surface S23. Light from the object passes sequentially through each surface S1 to S23 and is finally imaged on the imaging surface, where an image sensor chip IMA may be disposed.

[0098] Table 1 shows the radius of curvature R, thickness d / distance T, refractive index N, and Abbe number Vd of each lens in the optical lens of Embodiment 1. Regarding "thickness d / distance T", it should be understood that the thickness d / distance T in the row containing S1 is the center thickness of the first lens L1, the thickness d / distance T in the row containing S2 is the air gap distance between the first lens L1 and the second lens L2, the thickness d / distance T in the row containing S3 is the center thickness of the second lens L2, and so on.

[0099]

[0100]

[0101] Table 1

[0102] In Example 1, the object-side and image-side surfaces of the second lens L2, the fourth lens L4, the seventh lens L7, and the eleventh lens L11 are all aspherical. The surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0103]

[0104] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A13, S14, S20, and S21 that can be used for the aspherical mirrors S3, S4, S7, S8, S13, S14, S20, and S21 in Example 1. 10 A 12 and A 14 .

[0105] Face number k A4 A6 A8 A10 A12 A14 S3 0.05 5.09E-03 -7.15E-04 5.94E-05 -2.68E-06 5.03E-08 0.00E+00 S4 -0.10 5.07E-03 -6.12E-04 -4.60E-05 1.38E-05 -9.69E-07 0.00E+00 S7 -2.27 2.77E-03 1.67E-04 -3.86E-05 6.63E-06 -6.23E-07 0.00E+00 S8 90.00 3.97E-03 2.41E-04 -4.59E-05 1.76E-05 -2.90E-06 0.00E+00 S13 -8.28 3.06E-03 -9.06E-05 2.55E-06 -1.04E-06 1.13E-07 -6.96E-09 S14 0.06 7.93E-04 4.93E-06 9.08E-06 -2.47E-06 2.88E-07 -1.48E-08 S20 90.00 -3.25E-03 -6.83E-05 -2.33E-05 2.36E-06 -3.51E-08 0.00E+00 S21 6.56 -6.33E-04 -1.20E-04 6.21E-07 5.13E-07 -1.46E-08 0.00E+00

[0106] Table 2

[0107] Example 2

[0108] Figure 2 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown below, with reference to the following. Figure 2This paper describes an optical lens according to Embodiment 2 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted in this embodiment and the following embodiments.

[0109] like Figure 2 As shown, the optical lens, along the optical axis from the object side to the image side, sequentially includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an aperture stop STO, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11, a filter and / or protective glass CG, and an imaging plane IM. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented doublet lens group; the eighth lens L8 and the ninth lens L9 are cemented together to form a cemented doublet lens group.

[0110] In this embodiment, the first lens L1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S3 is convex, and its image-side surface S4 is concave. The third lens L3 has negative optical power, its object-side surface S5 is concave, and its image-side surface S6 is concave. The fourth lens L4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is concave. The fifth lens L5 has negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is convex. The sixth lens L6 has positive optical power, its object-side surface S10 is concave, and its image-side surface S11 is convex. The seventh lens L7 has positive optical power, its object-side surface S13 is convex, and its image-side surface S14 is convex. The eighth lens L8 has positive optical power, its object-side surface S15 is convex, and its image-side surface S16 is convex. The ninth lens L9 has negative optical power, with its object-side surface S16 being concave and its image-side surface S17 being concave. The tenth lens L10 has positive optical power, with its object-side surface S18 being convex and its image-side surface S19 being convex. The eleventh lens L11 has positive optical power, with its object-side surface S20 being concave and its image-side surface S21 being convex.

[0111] In this embodiment, the aperture stop STO of the optical lens is positioned between the sixth lens L6 and the seventh lens L7.

[0112] In this embodiment, the filter and / or protective glass CG located between the eleventh lens L11 and the imaging surface has an object-side surface S22 and an image-side surface S23. Light from the object passes sequentially through each surface S1 to S23 and is finally imaged on the imaging surface, where an image sensor chip IMA may be disposed.

[0113] Table 3 shows the radius of curvature R, thickness d / distance T, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 2.

[0114]

[0115]

[0116] Table 3

[0117] In this embodiment, the object-side and image-side surfaces of the second lens L2, the fourth lens L4, the seventh lens L7, and the eleventh lens L11 are all aspherical surfaces, and the surface shape of each aspherical surface can be defined by formula (1) given in embodiment 1 above. Table 4 gives the conic coefficient k and higher-order coefficients A4, A6, A8, and A11 of each aspherical mirror surface S3, S4, S7, S8, S13, S14, S20, and S21 that can be used in this embodiment. 10 A 12 and A 14 .

[0118] Face number k A4 A6 A8 A10 A12 A14 S3 0.05 5.09E-03 -7.10E-04 5.95E-05 -2.69E-06 4.92E-08 0.00E+00 S4 -0.10 5.11E-03 -5.98E-04 -4.38E-05 1.39E-05 -9.51E-07 0.00E+00 S7 -2.27 2.72E-03 1.77E-04 -3.83E-05 6.62E-06 -5.89E-07 0.00E+00 S8 90.00 4.18E-03 2.48E-04 -3.73E-05 1.90E-05 -3.20E-06 0.00E+00 S13 -8.28 3.05E-03 -8.52E-05 2.62E-06 -1.17E-06 9.37E-08 -3.75E-09 S14 0.06 8.08E-04 -1.74E-06 8.73E-06 -2.42E-06 2.97E-07 -1.58E-08 S20 90.00 -3.30E-03 -6.77E-05 -2.23E-05 2.43E-06 -3.23E-08 0.00E+00 S21 6.56 -6.55E-04 -1.29E-04 5.29E-07 5.38E-07 -1.47E-08 0.00E+00

[0119] Table 4

[0120] Example 3

[0121] Figure 3 A schematic diagram of the optical lens according to Embodiment 3 of this application is shown below, with reference to the following. Figure 3 The optical lens according to Embodiment 3 of this application is described.

[0122] like Figure 3 As shown, the optical lens, along the optical axis from the object side to the image side, includes, in sequence: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an aperture stop STO, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11, a filter and / or protective glass CG, and an imaging plane IM. The eighth lens L8 and the ninth lens L9 are cemented together to form a cemented doublet lens group.

[0123] In this embodiment, the first lens L1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S3 is convex, and its image-side surface S4 is concave. The third lens L3 has negative optical power, its object-side surface S5 is concave, and its image-side surface S6 is concave. The fourth lens L4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is concave. The fifth lens L5 has negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is convex. The sixth lens L6 has positive optical power, its object-side surface S11 is concave, and its image-side surface S12 is convex. The seventh lens L7 has positive optical power, its object-side surface S14 is convex, and its image-side surface S15 is convex. The eighth lens L8 has positive optical power, its object-side surface S16 is convex, and its image-side surface S17 is convex. The ninth lens L9 has negative optical power, with its object-side surface S17 being concave and its image-side surface S18 being concave. The tenth lens L10 has positive optical power, with its object-side surface S19 being convex and its image-side surface S20 being convex. The eleventh lens L11 has positive optical power, with its object-side surface S21 being concave and its image-side surface S22 being convex.

[0124] In this embodiment, the aperture stop STO of the optical lens is positioned between the sixth lens L6 and the seventh lens L7.

[0125] In this embodiment, the filter and / or protective glass CG located between the eleventh lens L11 and the imaging surface has an object-side surface S23 and an image-side surface S24. Light from the object passes sequentially through each surface S1 to S24 and is finally imaged on the imaging surface, where an image sensor chip IMA may be disposed.

[0126] Table 5 shows the radius of curvature R, thickness d / distance T, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 3.

[0127]

[0128] In this embodiment, the object-side and image-side surfaces of the second lens L2, the fourth lens L4, the seventh lens L7, and the eleventh lens L11 are all aspherical surfaces, and the surface shape of each aspherical surface can be defined by formula (1) given in Embodiment 1 above. Table 6 gives the conic coefficient k and higher-order coefficients A4, A6, A8, and A22 of each aspherical mirror surface S3, S4, S7, S8, S14, S15, S21, and S22 that can be used in this embodiment. 10 A 12 and A 14 .

[0129] Face number k A4 A6 A8 A10 A12 A14 S3 0.05 4.74E-03 -7.10E-04 5.99E-05 -2.67E-06 4.78E-08 0.00E+00 S4 -0.10 4.98E-03 -6.21E-04 -4.34E-05 1.41E-05 -9.41E-07 0.00E+00 S7 -2.27 2.68E-03 1.44E-04 -4.07E-05 6.79E-06 -6.23E-07 0.00E+00 S8 90.00 4.01E-03 1.50E-04 -4.78E-05 1.84E-05 -3.01E-06 0.00E+00 S14 -8.28 3.10E-03 -8.61E-05 2.42E-06 -1.12E-06 1.06E-07 -5.25E-09 S15 0.06 7.22E-04 -7.64E-06 9.04E-06 -2.32E-06 3.04E-07 -1.67E-08 S21 90.00 -3.16E-03 -6.74E-05 -2.36E-05 2.32E-06 -3.60E-08 0.00E+00 S22 6.56 -8.27E-04 -1.35E-04 2.20E-07 5.03E-07 -1.42E-08 0.00E+00

[0130] Table 6

[0131] Example 4

[0132] Figure 4 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown below, with reference to the following. Figure 4 The optical lens according to Embodiment 4 of this application is described.

[0133] like Figure 4 As shown, the optical lens, along the optical axis from the object side to the image side, sequentially includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an aperture stop STO, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11, a filter and / or protective glass CG, and an imaging plane IM. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented doublet lens group; the eighth lens L8 and the ninth lens L9 are cemented together to form a cemented doublet lens group.

[0134] In this embodiment, the first lens L1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S3 is convex, and its image-side surface S4 is concave. The third lens L3 has negative optical power, its object-side surface S5 is concave, and its image-side surface S6 is concave. The fourth lens L4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is concave. The fifth lens L5 has negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is convex. The sixth lens L6 has positive optical power, its object-side surface S10 is concave, and its image-side surface S11 is convex. The seventh lens L7 has positive optical power, its object-side surface S13 is convex, and its image-side surface S14 is convex. The eighth lens L8 has positive optical power, its object-side surface S15 is convex, and its image-side surface S16 is convex. The ninth lens L9 has negative optical power, with its object-side surface S16 being concave and its image-side surface S17 being concave. The tenth lens L10 has positive optical power, with its object-side surface S18 being convex and its image-side surface S19 being convex. The eleventh lens L11 has negative optical power, with its object-side surface S20 being concave and its image-side surface S21 being convex.

[0135] In this embodiment, the aperture stop STO of the optical lens is positioned between the sixth lens L6 and the seventh lens L7.

[0136] In this embodiment, the filter and / or protective glass CG located between the eleventh lens L11 and the imaging surface has an object-side surface S22 and an image-side surface S23. Light from the object passes sequentially through each surface S1 to S23 and is finally imaged on the imaging surface, where an image sensor chip IMA may be disposed.

[0137] Table 7 shows the radius of curvature R, thickness d / distance T, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 4.

[0138]

[0139] Table 7

[0140] In this embodiment, the object-side and image-side surfaces of the second lens L2, the fourth lens L4, the seventh lens L7, and the eleventh lens L11 are all aspherical surfaces, and the surface shape of each aspherical surface can be defined by formula (1) given in Embodiment 1 above. Table 8 gives the conic coefficient k and higher-order coefficients A4, A6, A8, and A11 of each aspherical mirror surface S3, S4, S7, S8, S13, S14, S20, and S21 that can be used in this embodiment. 10 A 12 and A 14 .

[0141]

[0142] S21 6.56 -6.61E-04 -1.25E-04 7.23E-06 2.88E-07 -1.64E-08 0.00E+00

[0143] Table 8

[0144] In summary, Examples 1 to 4 satisfy the relationships shown in Table 9 below.

[0145] Conditional Implementation Examples Example 1 Example 2 Example 3 Example 4 f1 / f -3.05 -3.15 -3.12 -4.53 f2 / f -2.14 -2.30 -1.96 -2.29 f3 / f -6.03 -6.11 -5.55 -4.86 f4 / f 3.24 3.51 3.07 4.90 f5 / f -2.41 -2.60 -2.20 -1.50 f6 / f 3.19 3.41 2.92 2.03 f7 / f 2.57 2.76 2.37 2.43 f8 / f 1.91 2.05 1.74 1.86 f9 / f -1.20 -1.31 -1.10 -1.26 f10 / f 2.96 3.12 2.83 2.84 f11 / f 15.43 16.39 18.42 -18.81 TTL / f 8.59 9.19 7.94 8.46 fa / f -1.57 -1.63 -1.50 -1.29 fb / f 2.15 2.27 2.02 1.82 D / f 1.52 1.44 1.39 1.44 M1 / TTL 0.38 0.40 0.37 0.37 f1 / f2 1.42 1.37 1.59 1.98 f1 / f3 0.51 0.52 0.56 0.93 CT4 / CT6 1.35 1.41 1.33 0.99 CT10 / CT11 1.78 1.69 1.71 1.35

[0146] Table 9

[0147] This application also provides an electronic device that may include an optical lens according to the above embodiments of this application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0148] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens characterized in that, In order from the object side to the image side along the optical axis, comprises: a first lens with negative refractive power, whose object side surface is convex and whose image side surface is concave; a second lens with negative refractive power, whose object side surface is convex and whose image side surface is concave; a third lens with negative refractive power, whose image side surface is concave; a fourth lens with positive refractive power, whose object side surface is convex and whose image side surface is concave; a fifth lens with negative refractive power, whose object side surface is concave; a sixth lens with positive refractive power, whose image side surface is convex; a seventh lens with positive refractive power, whose object side surface is convex and whose image side surface is convex; an eighth lens with positive refractive power, whose object side surface is convex and whose image side surface is convex; a ninth lens with negative refractive power, whose object side surface is concave and whose image side surface is concave; a tenth lens with positive refractive power, whose object side surface is convex and whose image side surface is convex; and an eleventh lens with refractive power, whose object side surface is concave and whose image side surface is convex, wherein the number of lenses with refractive power in the optical lens is eleven.

2. The optical lens of claim 1, wherein, The object side surface of the third lens is convex or concave.

3. The optical lens of claim 1, wherein, The image side surface of the fifth lens is convex or concave.

4. The optical lens of claim 1, wherein, The object side surface of the sixth lens is convex or concave.

5. The optical lens of any of claims 1 to 4, wherein, The effective focal length f1 of the first lens and the total effective focal length f of the optical lens satisfy: -5.5≤f1 / f≤-2.

8.

6. The optical lens of any of claims 1 to 4, wherein, The effective focal length f2 of the second lens and the total effective focal length f of the optical lens satisfy: -2.5≤f2 / f≤-1.

5.

7. The optical lens of any of claims 1 to 4, wherein, The effective focal length f3 of the third lens and the total effective focal length f of the optical lens satisfy: -6.5≤f3 / f≤-3.

5.

8. The optical lens of any of claims 1 to 4, wherein, The effective focal length f4 of the fourth lens and the total effective focal length f of the optical lens satisfy: 2.5≤f4 / f≤5.

5.

9. The optical lens of any of claims 1 to 4, wherein, The effective focal length f5 of the fifth lens and the total effective focal length f of the optical lens satisfy: -3.0≤f5 / f≤-1.

0.

10. The optical lens of any of claims 1 to 4, wherein, The effective focal length f6 of the sixth lens and the total effective focal length f of the optical lens satisfy: 1.5≤f6 / f≤4.

0.

11. The optical lens of any of claims 1 to 4, wherein, The effective focal length f7 of the seventh lens and the total effective focal length f of the optical lens satisfy: 2.0≤f7 / f≤3.

0.

12. The optical lens of any of claims 1 to 4, wherein, The effective focal length f8 of the eighth lens and the total effective focal length f of the optical lens satisfy: 1.5≤f8 / f≤2.

5.

13. The optical lens of any of claims 1 to 4, wherein, The effective focal length f9 of the ninth lens and the total effective focal length f of the optical lens satisfy: -1.5≤f9 / f≤-1.

0.

14. The optical lens of any of claims 1 to 4, wherein, The effective focal length f10 of the tenth lens and the total effective focal length f of the optical lens satisfy: 2.0≤f10 / f≤3.

5.

15. The optical lens of any of claims 1 to 4, wherein, The effective focal length f11 of the eleventh lens and the total effective focal length f of the optical lens satisfy: -20≤f11 / f≤20.

16. The optical lens of any of claims 1 to 4, wherein, The effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: 1.0≤f1 / f2≤3.

0.

17. The optical lens of any of claims 1 to 4, wherein, The effective focal length f1 of the first lens and the effective focal length f3 of the third lens satisfy: 0.5≤f1 / f3≤1.

5.

18. The optical lens of any of claims 1 to 4, wherein, The combined focal length fa of the first lens to the sixth lens and the total effective focal length f of the optical lens satisfy: -2.0≤fa / f≤-1.

0.

19. The optical lens of any of claims 1 to 4, wherein, A combination focal length fb of the seventh lens to the eleventh lens and a total effective focal length f of the optical lens satisfy: 1.5 ≤ fb / f ≤ 2.

5.

20. The optical lens of any of claims 1 to 4, wherein, A distance TTL on the optical axis from an object side surface of the first lens to an imaging surface of the optical lens and a total effective focal length f of the optical lens satisfy: 7.0 ≤ TTL / f ≤ 9.

5.

21. The optical lens of any of claims 1 to 4, wherein, A maximum imaging element D of the optical lens and a total effective focal length f of the optical lens satisfy: 1.0 ≤ D / f ≤ 2.

0.

22. The optical lens of any of claims 1 to 4, wherein, A distance M1 on the optical axis from the object side surface of the first lens to a diaphragm of the optical lens and a distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the optical lens satisfy: 0.35 ≤ M1 / TTL ≤ 0.

45.

23. The optical lens of any of claims 1 to 4, wherein, A central thickness CT4 of the fourth lens on the optical axis and a central thickness CT6 of the sixth lens on the optical axis satisfy: 0.5 ≤ CT4 / CT6 ≤ 1.

5.

24. The optical lens of any of claims 1 to 4, wherein, A central thickness CT10 of the tenth lens on the optical axis and a central thickness CT11 of the eleventh lens on the optical axis satisfy: 1.0 ≤ CT10 / CT11 ≤ 2.0.

Images