Optical lens

Abstract

The utility model discloses an optical lens. The optical lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis, the second lens has negative focal power; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power; the fifth lens has positive focal power; the sixth lens has negative focal power; the seventh lens has negative focal power; the eighth lens has positive focal power; the ninth lens has positive focal power; the object side surface of the tenth lens is a concave surface, and the image side surface of the tenth lens is a convex surface; and the eleventh lens has positive focal power, the object side surface of the eleventh lens is a convex surface, and the image side surface of the eleventh lens is a concave surface.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more specifically, to an optical lens. Background Art

[0002] With the continuous progress and development of existing image processing algorithms and AI technologies, in recent years, the types of fixed-focus lenses have become more diversified and are widely used in various fields such as intelligent transportation.

[0003] However, some existing optical lens designs have a small target surface and cannot be paired with more chips of different sizes; some other optical lenses have low resolution, resulting in low clarity of the captured images, thus seriously affecting the imaging quality of the optical lens; some other optical lenses have poor light transmission and cannot meet the shooting requirements in darker environments; some other optical lenses have large optical distortion, leading to great difficulty in later recognition, etc. Therefore, the existing optical lenses at least still have problems such as small target surface, low resolution, poor light transmission, and large optical distortion. Utility Model Content

[0004] The present application provides an optical lens that can at least solve or partially solve at least one problem or other problems existing in the prior art.

[0005] One aspect of the present application provides an optical lens, which sequentially includes, along the optical axis from the object side to the image side: a first lens with a negative optical power; a second lens with a negative optical power; a third lens with a positive optical power; a fourth lens with a positive optical power; a fifth lens with a positive optical power; a sixth lens with a negative optical power; a seventh lens with a negative optical power; an eighth lens with a positive optical power; a ninth lens with a positive optical power; a tenth lens with a negative optical power; and an eleventh lens with a positive optical power.

[0006] According to an exemplary embodiment of the present application, the object side surface of the first lens is convex and the image side surface is concave; the object side surface of the second lens is concave and the image side surface is concave; the object side surface of the third lens is convex and the image side surface is convex; the object side surface of the fourth lens is convex and the image side surface is convex; the object side surface of the fifth lens is convex; the image side surface of the sixth lens is concave; the object side surface of the seventh lens is concave and the image side surface is concave; the object side surface of the eighth lens is convex and the image side surface is convex; the object side surface of the ninth lens is convex and the image side surface is convex; the object side surface of the tenth lens is concave and the image side surface is convex; and the object side surface of the eleventh lens is convex and the image side surface is concave.

[0007] According to an exemplary embodiment of the present application, the effective focal length F1 of the first lens and the effective focal length F of the optical lens satisfy: -2.2 ≤ F1 / F ≤ -1.7.

[0008] According to an exemplary embodiment of the present application, the combined focal length F23 of the second lens and the third lens and the effective focal length F of the optical lens satisfy: -3.7 ≤ F23 / F ≤ -2.6.

[0009] According to an exemplary embodiment of the present application, the effective focal length F4 of the fourth lens and the effective focal length F of the optical lens satisfy: 1.4 ≤ F4 / F ≤ 1.9.

[0010] According to an exemplary embodiment of the present application, the effective focal length F5 of the fifth lens and the effective focal length F of the optical lens satisfy: 1.1 ≤ F5 / F ≤ 1.7.

[0011] According to an exemplary embodiment of the present application, the effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens satisfy: -1.5 ≤ F5 / F6 ≤ -1.0.

[0012] According to an exemplary embodiment of the present application, the effective focal length F7 of the seventh lens and the effective focal length F of the optical lens satisfy: -0.9 ≤ F7 / F ≤ -0.7.

[0013] According to an exemplary embodiment of the present application, the effective focal length F8 of the eighth lens and the effective focal length F of the optical lens satisfy: 1.2 ≤ F8 / F ≤ 1.4.

[0014] According to an exemplary embodiment of the present application, the combined focal length F78 of the seventh lens and the eighth lens and the effective focal length F of the optical lens satisfy: -3.9 ≤ F78 / F ≤ -2.4.

[0015] According to an exemplary embodiment of the present application, the effective focal length F9 of the ninth lens and the effective focal length F of the optical lens satisfy: 1 ≤ F9 / F ≤ 1.2.

[0016] According to an exemplary embodiment of the present application, the combined focal length F910 of the ninth lens and the tenth lens and the effective focal length F of the optical lens satisfy: 1.3 ≤ F910 / F ≤ 1.8.

[0017] According to an exemplary embodiment of the present application, the effective focal length F11 of the eleventh lens and the effective focal length F of the optical lens satisfy: 2.9 ≤ F11 / F ≤ 3.9.

[0018] According to an exemplary embodiment of the present application, the optical lens further includes a diaphragm, and the lenses located on the object side of the diaphragm form a lens group with a positive optical power. The combined focal length FA of the lens group and the effective focal length F of the optical lens satisfy: 4.0 ≤ FA / F ≤ 7.4.

[0019] According to an exemplary embodiment of the present application, the maximum semi-image height IH of the optical lens and the 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 < IH / TTL ≤ 0.1.

[0020] According to an exemplary embodiment of the present application, the maximum semi-image height IH of the optical lens and the full aperture D1 of the first lens satisfy: 0.3 ≤ IH / D1 ≤ 0.5.

[0021] According to an exemplary embodiment of the present application, the Abbe number VD1 of the first lens satisfies: VD1 ≥ 65.

[0022] According to an exemplary embodiment of the present application, the Abbe number VD5 of the fifth lens satisfies: VD5 ≥ 35.

[0023] According to an exemplary embodiment of the present application, the Abbe number VD8 of the eighth lens satisfies: VD8 ≥ 80. Description of the Drawings

[0024] In conjunction with the accompanying drawings, through the following detailed description of the embodiments, other features, objects, and advantages of the present application will become more apparent. In the drawings:

[0025] Figure 1 is a schematic structural diagram of the optical lens according to Embodiment 1 of the present application;

[0026] Figure 2 is a schematic structural diagram of the optical lens according to Embodiment 2 of the present application;

[0027] Figure 3 is a schematic structural diagram of the optical lens according to Embodiment 3 of the present application; and

[0028] Figure 4 is a schematic structural diagram of the optical lens according to Embodiment 4 of the present application. Detailed Embodiments

[0029] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant accompanying drawings. It should be understood that these detailed descriptions are only descriptions of the exemplary embodiments of the present application and do not limit the scope of the present 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.

[0030] It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature and do not represent any limitation on the feature. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0031] In the drawings, for the sake of clarity, the thickness, dimensions, and shape of the lenses are slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are presented by way of example. That is, the spherical or aspherical shapes are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn to an exact scale.

[0032] In this document, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface 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 position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging side is called the image side of the lens.

[0033] It should also be understood that the terms "comprises," "comprising," "has," "having," "includes," and / or "including," when used in this specification, specify the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Further, when an expression such as "at least one of..." appears after a list of listed features, it modifies the entire list of listed features rather than individual elements in the list. Additionally, when describing embodiments of the present application, the use of "may" indicates "one or more embodiments of the present application." And the term "exemplary" is intended to refer to an example or illustration.

[0034] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formalized sense unless expressly so defined herein.

[0035] It should be noted that, without conflict, the embodiments and features in the embodiments of this application may be combined with each other. The following embodiments merely represent several implementation manners of this application, and their descriptions are relatively specific and detailed, but should not be construed as limiting the patent scope of this application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application.

[0036] The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0037] In an exemplary embodiment, the optical lens includes 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 arranged in sequence from the object side to the image side along the optical axis. There can be a spacing distance between any adjacent lenses among the first lens to the eleventh lens, and this spacing distance can be an air gap.

[0038] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the image side of the eleventh lens. Optionally, the photosensitive element disposed on the image side of the eleventh lens can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor element (CMOS).

[0039] In an exemplary embodiment, the optical lens further includes a diaphragm for restricting the light beam to further improve the imaging quality of the optical lens. Exemplarily, the diaphragm can be disposed between adjacent lenses and / or on the object side or the image side of any of the lenses. It should be noted that the position of the diaphragm is only an example and not a limitation; in alternative embodiments, the diaphragm can also be disposed at other positions according to actual needs.

[0040] In an exemplary embodiment, the first lens has a negative optical power, and the object side surface is convex and the image side surface is concave, which is beneficial to further diverging light and effectively improving the illuminance of the optical system.

[0041] In an exemplary embodiment, the second lens has a negative optical power, and the object side surface is concave and the image side surface is concave, which can further slow down the light deflection.

[0042] In an exemplary embodiment, the third lens has a positive optical power, and the object side surface is convex and the image side surface is convex. When used in combination with the second lens having a negative optical power, it can effectively correct chromatic aberration.

[0043] In an exemplary embodiment, the fourth lens has a positive optical power, and the object side surface is convex and the image side surface is convex, which can effectively control the incident height of light and reduce the tolerance sensitivity.

[0044] In an exemplary embodiment, the fifth lens has a positive optical power, and the object side surface is convex and the image side surface is convex or concave.

[0045] In an exemplary embodiment, the sixth lens has a negative optical power, and the object side surface is convex or concave and the image side surface is concave. When used in combination with the fifth lens having a positive optical power, it can effectively correct the system chromatic aberration or aberration, improve the imaging quality, and play a good role in balancing the high and low temperatures of the optical system.

[0046] In an exemplary embodiment, the seventh lens has a negative optical power, the object side is concave, and the image side is concave, such that the light passing through the seventh lens is lifted upward and smoothly enters the imaging surface, which is beneficial to achieving a large target surface.

[0047] In an exemplary embodiment, the eighth lens has a positive optical power, the object side is convex, and the image side is convex. When used in combination with the seventh lens having a negative optical power, it can further lift the light upward and smoothly enter the imaging surface, effectively correct the chromatic aberration of the system, and play a good role in balancing the high and low temperatures of the optical system.

[0048] In an exemplary embodiment, the ninth lens has a positive optical power, its object side is convex, and the image side is convex, such that the lifted light smoothly enters the imaging surface, reduces the sensitivity of the system to tolerances, and plays a good role in balancing the high and low temperatures of the optical system.

[0049] In an exemplary embodiment, the tenth lens has a negative optical power, the object side is concave, and the image side is convex. When cemented with the ninth lens having a positive optical power, it can effectively correct the chromatic aberration of the system and improve the imaging quality.

[0050] In an exemplary embodiment, the eleventh lens has a positive optical power, the object side of the paraxial region is convex, and the image side is concave, which can effectively collect light and make the light smoothly reach the imaging surface.

[0051] In an exemplary embodiment, the effective focal length F1 of the first lens and the effective focal length F of the optical lens satisfy: -2.2 ≤ F1 / F ≤ -1.7. By reasonably distributing the focal length value of the first lens, it is beneficial to make the light enter the optical system to achieve a large target surface.

[0052] In an exemplary embodiment, the combined focal length F23 of the second lens and the third lens and the effective focal length F of the optical lens satisfy: -3.7 ≤ F23 / F ≤ -2.6. By reasonably distributing the combined focal length value of the second lens and the third lens, the second lens and the third lens cooperate to eliminate chromatic aberration, reduce spherical aberration, and improve resolution.

[0053] In an exemplary embodiment, the effective focal length F4 of the fourth lens and the effective focal length F of the optical lens satisfy: 1.4 ≤ F4 / F ≤ 1.9. By reasonably distributing the focal length value of the fourth lens, it is beneficial to make more light enter the optical system smoothly to achieve a large aperture and a large target surface.

[0054] In an exemplary embodiment, the effective focal length F5 of the fifth lens and the effective focal length F of the optical lens satisfy: 1.1 ≤ F5 / F ≤ 1.7. The fifth lens has a positive optical power. By reasonably distributing the focal length value of the fifth lens, it is beneficial to eliminate chromatic aberration, reduce spherical aberration, and improve resolution.

[0055] In an exemplary embodiment, the effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens satisfy: -1.5 ≤ F5 / F6 ≤ -1.0. The fifth lens has a positive optical power, cooperates with the sixth lens, and by reasonably distributing the focal length values of the fifth lens and the sixth lens, it is beneficial to eliminate chromatic aberration and improve resolution.

[0056] In an exemplary embodiment, the effective focal length F7 of the seventh lens and the effective focal length F of the optical lens satisfy: -0.9 ≤ F7 / F ≤ -0.7. The seventh lens has a negative optical power, cooperates with the eighth lens, and by reasonably distributing the focal length value of the seventh lens, it is beneficial to eliminate chromatic aberration, reduce spherical aberration, and improve resolution.

[0057] In an exemplary embodiment, the effective focal length F8 of the eighth lens and the effective focal length F of the optical lens satisfy: 1.2 ≤ F8 / F ≤ 1.4.

[0058] In an exemplary embodiment, the combined focal length F78 of the seventh lens and the eighth lens and the effective focal length F of the optical lens satisfy: -3.9 ≤ F78 / F ≤ -2.4. The eighth lens has a positive optical power, so that the light passing through the seventh lens is lifted upward and smoothly enters the imaging surface, which is beneficial to achieving a large target surface; and in cooperation with the seventh lens, by reasonably distributing the combined focal length value of the seventh lens and the eighth lens, it is beneficial to correct chromatic aberration and improve resolution.

[0059] In an exemplary embodiment, the effective focal length F9 of the ninth lens and the effective focal length F of the optical lens satisfy: 1 ≤ F9 / F ≤ 1.2. The ninth lens has a positive optical power. By reasonably distributing the focal length value of the ninth lens, the light passing through the seventh lens and the eighth lens is lifted upward and smoothly enters the imaging surface, which is beneficial to achieving a large target surface and at the same time reducing the sensitivity of the system to tolerances.

[0060] In an exemplary embodiment, the combined focal length F910 of the ninth lens and the tenth lens and the effective focal length F of the optical lens satisfy: 1.3 ≤ F910 / F ≤ 1.8. The ninth lens has a positive optical power, cooperates with the tenth lens, and by reasonably distributing the combined focal length value of the ninth lens and the tenth lens, the light passing through the seventh lens and the eighth lens is lifted upward and smoothly enters the imaging surface, which is beneficial to achieving a large target surface, at the same time reducing the sensitivity of the system to tolerances, and playing a good role in balancing the high and low temperatures of the optical system.

[0061] In an exemplary embodiment, the effective focal length F11 of the eleventh lens and the effective focal length F of the optical lens satisfy: 2.9 ≤ F11 / F ≤ 3.9. The eleventh lens has a positive optical power, and by reasonably distributing the focal length value of the eleventh lens, light can be effectively collected.

[0062] In an exemplary embodiment, the optical lens further includes a diaphragm. The lens located on the object side of the diaphragm forms a lens group with a positive focal power. The combined focal length FA of the lens group and the effective focal length F of the optical lens satisfy: 4.0 ≤ FA / F ≤ 7.4. By reasonably allocating the focal length values of the lens group, chromatic aberration of the system can be effectively corrected, and the imaging quality can be improved. As an example, the diaphragm can be disposed between the sixth lens and the seventh lens.

[0063] In an exemplary embodiment, the maximum semi-image height IH of the optical lens and the distance TTL from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0 < IH / TTL ≤ 0.1. By reasonably controlling the semi-image height and the total length of the optical lens, it is beneficial to miniaturize the optical lens.

[0064] In an exemplary embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfies: TTL ≤ 95 mm, and a small volume of the optical lens can be achieved.

[0065] In an exemplary embodiment, the maximum semi-image height IH of the optical lens and the full aperture D1 of the first lens satisfy: 0.3 ≤ IH / D1 ≤ 0.5. By reasonably controlling the semi-image height of the optical lens and the full aperture of the first lens, it is beneficial to miniaturize the optical lens.

[0066] In an exemplary embodiment, the Abbe number VD1 of the first lens satisfies: VD1 ≥ 65. By reasonably setting the Abbe number of the first lens, chromatic aberration can be effectively eliminated, and a good balance of high and low temperatures of the optical lens can be achieved. As an example, the Abbe number VD1 of the first lens can satisfy: 85 ≥ VD1 ≥ 65.

[0067] In an exemplary embodiment, the Abbe number VD5 of the fifth lens satisfies: VD5 ≥ 35. By reasonably setting the Abbe number of the fifth lens, chromatic aberration can be effectively balanced. As an example, the Abbe number VD5 of the fifth lens can satisfy: 50 ≥ VD5 ≥ 35.

[0068] In an exemplary embodiment, the Abbe number VD8 of the eighth lens satisfies: VD8 ≥ 80. By reasonably setting the Abbe number of the eighth lens, chromatic aberration can be effectively eliminated, and a good balance of high and low temperatures of the optical lens can be achieved. As an example, the Abbe number VD8 of the eighth lens can satisfy: 95 ≥ VD8 ≥ 80.

[0069] In an exemplary embodiment, the F-number (FNO) of the optical lens of the present application is ≤ 1.25. By controlling the F-number, a large aperture is effectively achieved, and the light transmission of the optical lens is improved. As an example, the F-number (FNO) of the optical lens may satisfy 1.15 ≤ FNO ≤ 1.25.

[0070] In an exemplary embodiment, the maximum full image height of the optical lens of the present application can reach 17.6 mm, and the illuminance is ≥ 40%, effectively achieving a large target surface and high illuminance of the optical lens.

[0071] In an exemplary embodiment, the optical distortion of the optical lens of the present application is between -10% and 0%. Through the design of the overall architecture of the optical lens of the present application, low distortion of the optical lens can be achieved.

[0072] In an exemplary embodiment, the optical lens of the present application has a high-definition imaging quality for visible light in the wavelength range of 435 - 656 nm and has a high resolution.

[0073] In an exemplary embodiment, as needed, the optical lens of the present application may further include a filter and / or a protective glass disposed between the eleventh lens and the imaging surface. The filter can filter light rays with different wavelengths, and the protective glass can prevent damage to the image-side elements (such as chips) of the optical lens.

[0074] The optical lens of the present application may employ multiple lenses, for example, eleven lenses. However, those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses constituting the lens can be changed to obtain the various results and advantages described in this specification. For example, although eleven lenses are described as an example in the embodiment, the optical lens is not limited to including eleven lenses. If necessary, the optical lens may further include other numbers of lenses. At the same time, it should be noted that the multiple lenses employed by the optical lens of the present application can be spherical lenses or aspherical lenses. Exemplarily, all eleven lenses can be spherical lenses.

[0075] The following further describes specific embodiments of the optical lens applicable to the above embodiments with reference to the accompanying drawings.

[0076] Example 1

[0077] Figure 1 A schematic structural diagram of the optical lens according to Embodiment 1 of the present application is shown. As Figure 1 shown, the optical lens 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, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, and an eleventh lens L11 along the optical axis from the object side to the image side.

[0078] The first lens L1 has a negative focal power, its object side S1 is convex, and its image side S2 is concave.

[0079] The second lens L2 has a negative focal power, its object side S3 is concave, and its image side S4 is concave.

[0080] The third lens L3 has a positive focal power, its object side S4 is convex, and its image side S5 is convex.

[0081] The fourth lens L4 has a positive focal power, its object side S6 is convex, and its image side S7 is convex.

[0082] The fifth lens L5 has a positive focal power, its object side S8 is convex, and its image side S9 is convex.

[0083] The sixth lens L6 has a negative focal power, its object side S9 is concave, and its image side S10 is concave.

[0084] The seventh lens L7 has a negative focal power, its object side S12 is concave, and its image side S13 is concave.

[0085] The eighth lens L8 has a positive focal power, its object side S13 is convex, and its image side S14 is convex.

[0086] The ninth lens L9 has a positive focal power, its object side S15 is convex, and its image side S16 is convex.

[0087] The tenth lens L10 has a negative focal power, its object side S16 is concave, and its image side S17 is convex.

[0088] The eleventh lens L11 has a positive focal power, its object side S18 is convex, and its image side S19 is concave.

[0089] The shape of the object side or image side of each of the above lenses indicates the paraxial region of the lens surface.

[0090] The second lens L2 and the third lens L3 form a cemented lens, the fifth lens L5 and the sixth lens L6 form a cemented lens, the seventh lens L7 and the eighth lens L8 form a cemented lens, and the ninth lens L9 and the tenth lens L10 form a cemented lens.

[0091] The optical lens further includes a diaphragm STO (surface S11), and the diaphragm STO can be disposed between the sixth lens L6 and the seventh lens L7, and exemplarily, at a position closer to the seventh lens L7.

[0092] The f-number FNO of this optical lens is 1.25.

[0093] The optical lens may further include a filter (not shown) having an object side and an image side and / or a protective glass GLASS having an object side S20 and an image side S21. The filter can be used to correct color deviation, and the protective glass GLASS can be used to protect the image sensing chip located at the imaging surface IMAGE. Light from the object sequentially passes through the surfaces S1 to S21 and finally forms an image on the imaging surface IMAGE.

[0094] Table 1 shows the radius of curvature, thickness / distance, refractive index, and Abbe number of each lens of the optical lens of Example 1, where the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0095]

[0096] Table 1

[0097] In Example 1, the eleven lenses in the optical lens are all spherical lenses. By reasonably setting the surface shapes and parameters of each lens and through the cooperation of each lens, the optical lens of the present application has the characteristics of a large aperture, a large target surface, and high clarity, is suitable for shooting under different light and temperature conditions, effectively optimizes and balances chromatic aberration, and weakens ghost images.

[0098] Example 2

[0099] Figure 2 shows a schematic structural diagram of the optical lens of Embodiment 2 of the present application. As Figure 2 shown, the optical lens 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, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, and an eleventh lens L11 along the optical axis from the object side to the image side.

[0100] The first lens L1 has a negative optical power, its object side S1 is a convex surface, and its image side S2 is a concave surface.

[0101] The second lens L2 has a negative optical power, its object side S3 is a concave surface, and its image side S4 is a concave surface.

[0102] The third lens L3 has a positive optical power, its object side S4 is a convex surface, and its image side S5 is a convex surface.

[0103] The fourth lens L4 has a positive optical power, its object side S6 is a convex surface, and its image side S7 is a convex surface.

[0104] The fifth lens L5 has a positive optical power, its object side S8 is a convex surface, and its image side S9 is a concave surface.

[0105] The sixth lens L6 has a negative optical power, its object side S9 is a convex surface, and its image side S10 is a concave surface.

[0106] The seventh lens L7 has a negative optical power, its object side S12 is concave, and its image side S13 is concave.

[0107] The eighth lens L8 has a positive optical power, its object side S13 is convex, and its image side S14 is convex.

[0108] The ninth lens L9 has a positive optical power, its object side S15 is convex, and its image side S16 is convex.

[0109] The tenth lens L10 has a negative optical power, its object side S16 is concave, and its image side S17 is convex.

[0110] The eleventh lens L11 has a positive optical power, its object side S18 is convex, and its image side S19 is concave.

[0111] The shape of the object side or image side of each of the above lenses indicates the paraxial region of the lens surface.

[0112] The second lens L2 and the third lens L3 form a cemented lens, the fifth lens L5 and the sixth lens L6 form a cemented lens, the seventh lens L7 and the eighth lens L8 form a cemented lens, and the ninth lens L9 and the tenth lens L10 form a cemented lens.

[0113] The optical lens further includes a diaphragm STO (surface S11), and the diaphragm STO can be disposed between the sixth lens L6 and the seventh lens L7, and exemplarily, at a position closer to the sixth lens L6.

[0114] The f-number FNO of this optical lens is 1.21.

[0115] This optical lens may further include a filter (not shown) having an object side and an image side and / or a protective glass GLASS having an object side S20 and an image side S21. The filter can be used to correct color deviation, and the protective glass GLASS can be used to protect the image sensing chip located at the imaging surface IMAGE. The light from the object sequentially passes through the surfaces S1 to S21 and finally forms an image on the imaging surface IMAGE.

[0116] Table 2 shows the radius of curvature, thickness / distance, refractive index, and Abbe number of each lens of the optical lens of Example 2, where the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0117]

[0118]

[0119] Table 2

[0120] In Embodiment 2, all eleven lenses in the optical lens are spherical lenses. By reasonably setting the surface shapes and parameters of each lens, and through the cooperation of each lens, the optical lens of the present application has the characteristics of a large aperture, a large target surface, and high clarity, is suitable for shooting under different light and temperature conditions, effectively optimizes and balances chromatic aberration, and weakens ghost images.

[0121] Example 3

[0122] Figure 3 The structural schematic diagram of the optical lens according to Embodiment 3 of the present application is shown. 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, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, and an eleventh lens L11 along the optical axis from the object side to the image side.

[0123] The first lens L1 has a negative optical power, its object side surface S1 is a convex surface, and its image side surface S2 is a concave surface.

[0124] The second lens L2 has a negative optical power, its object side surface S3 is a concave surface, and its image side surface S4 is a concave surface.

[0125] The third lens L3 has a positive optical power, its object side surface S4 is a convex surface, and its image side surface S5 is a convex surface.

[0126] The fourth lens L4 has a positive optical power, its object side surface S6 is a convex surface, and its image side surface S7 is a convex surface.

[0127] The fifth lens L5 has a positive optical power, its object side surface S8 is a convex surface, and its image side surface S9 is a concave surface.

[0128] The sixth lens L6 has a negative optical power, its object side surface S9 is a convex surface, and its image side surface S10 is a concave surface.

[0129] The seventh lens L7 has a negative optical power, its object side surface S12 is a concave surface, and its image side surface S13 is a concave surface.

[0130] The eighth lens L8 has a positive optical power, its object side surface S13 is a convex surface, and its image side surface S14 is a convex surface.

[0131] The ninth lens L9 has a positive optical power, its object side surface S15 is a convex surface, and its image side surface S16 is a convex surface.

[0132] The tenth lens L10 has a negative optical power, its object side surface S16 is a concave surface, and its image side surface S17 is a convex surface.

[0133] The eleventh lens L11 has a positive optical power, its object side surface S18 is a convex surface, and its image side surface S19 is a concave surface.

[0134] The shape of the object side or the image side of each of the above lenses indicates the paraxial region of the lens surface.

[0135] The second lens L2 and the third lens L3 form a cemented lens, the fifth lens L5 and the sixth lens L6 form a cemented lens, the seventh lens L7 and the eighth lens L8 form a cemented lens, and the ninth lens L9 and the tenth lens L10 form a cemented lens.

[0136] The optical lens further includes a diaphragm STO (surface S11), and the diaphragm STO can be disposed between the sixth lens L6 and the seventh lens L7, and exemplarily, at a position closer to the seventh lens L7.

[0137] The f-number FNO of this optical lens is 1.21.

[0138] This optical lens may further include a filter (not shown) having an object side and an image side and / or a protective glass GLASS having an object side S20 and an image side S21. The filter can be used to correct color deviation, and the protective glass GLASS can be used to protect the image sensing chip located at the imaging surface IMAGE. The light from the object sequentially passes through the surfaces S1 to S21 and finally forms an image on the imaging surface IMAGE.

[0139] Table 3 shows the curvature radii, thicknesses / distances, refractive indices, and Abbe numbers of the lenses of the optical lens of Example 3, where the units of the curvature radii and thicknesses / distances are both millimeters (mm).

[0140]

[0141] Table 3

[0142] In Example 3, the eleven lenses in the optical lens are all spherical lenses. By reasonably setting the surface shapes and parameters of the lenses and through the cooperation of the lenses, the optical lens of the present application has the characteristics of a large aperture, a large target surface, and high clarity, is suitable for shooting under different light and temperature conditions, effectively optimizes and balances chromatic aberration, and weakens ghost images.

[0143] Example 4

[0144] Figure 4 shows a schematic structural diagram of the optical lens of Embodiment 4 of the present application. As Figure 4 shown, the optical lens 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, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, and an eleventh lens L11 along the optical axis from the object side to the image side.

[0145] The first lens L1 has a negative optical power, its object side S1 is convex, and its image side S2 is concave.

[0146] The second lens L2 has a negative optical power, its object side S3 is concave, and its image side S4 is concave.

[0147] The third lens L3 has a positive optical power, its object side S4 is convex, and its image side S5 is convex.

[0148] The fourth lens L4 has a positive optical power, its object side S6 is convex, and its image side S7 is convex.

[0149] The fifth lens L5 has a positive optical power, its object side S8 is convex, and its image side S9 is concave.

[0150] The sixth lens L6 has a negative optical power, its object side S9 is convex, and its image side S10 is concave.

[0151] The seventh lens L7 has a negative optical power, its object side S12 is concave, and its image side S13 is concave.

[0152] The eighth lens L8 has a positive optical power, its object side S13 is convex, and its image side S14 is convex.

[0153] The ninth lens L9 has a positive optical power, its object side S15 is convex, and its image side S16 is convex.

[0154] The tenth lens L10 has a negative optical power, its object side S16 is concave, and its image side S17 is convex.

[0155] The eleventh lens L11 has a positive optical power, its object side S18 is convex, and its image side S19 is concave.

[0156] The shape of the object side or the image side of each of the above lenses indicates the paraxial region of the lens surface.

[0157] The second lens L2 and the third lens L3 form a cemented lens, the fifth lens L5 and the sixth lens L6 form a cemented lens, the seventh lens L7 and the eighth lens L8 form a cemented lens, and the ninth lens L9 and the tenth lens L10 form a cemented lens.

[0158] The optical lens further includes a diaphragm STO (surface S11), and the diaphragm STO can be disposed between the sixth lens L6 and the seventh lens L7, and exemplarily, at a position closer to the seventh lens L7.

[0159] The f-number FNO of this optical lens is 1.21.

[0160] The optical lens may further include a filter (not shown) having an object side and an image side and / or a protective glass GLASS having an object side S20 and an image side S21. The filter can be used to correct color deviation, and the protective glass GLASS can be used to protect the image sensing chip located at the imaging surface IMAGE. Light from an object sequentially passes through each surface S1 to S21 and finally forms an image on the imaging surface IMAGE.

[0161] Table 4 shows the radius of curvature, thickness / distance, refractive index, and Abbe number of each lens of the optical lens of Example 4, where the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0162]

[0163]

[0164] Table 4

[0165] In Example 4, the eleven lenses in the optical lens are all spherical lenses. By reasonably setting the surface shapes and parameters of each lens and through the cooperation of each lens, the optical lens of the present application has the characteristics of a large aperture, a large target surface, and high clarity, is suitable for shooting under different light and temperature conditions, effectively optimizes and balances chromatic aberration, and weakens ghost images.

[0166] In summary, Examples 1 to 4 respectively satisfy the relationships shown in Table 5 below.

[0167]

[0168]

[0169] Table 5

[0170] The above description is only the preferred embodiments of the present application and the description of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features having similar functions disclosed in the present application.

Claims

1. An optical lens, characterized in that: Along the optical axis from the object side to the image side, they include: a first lens having negative optical power; a second lens having negative optical power; The third lens has positive power, and its object side surface is convex and its image side surface is convex; a fourth lens having positive refractive power; a fifth lens having positive refractive power; a sixth lens having negative optical power; a seventh lens having negative optical power; an eighth lens having positive refractive power; a ninth lens having positive refractive power; a tenth lens element having negative optical power, whose object-side surface is concave and whose image-side surface is convex; and The eleventh lens has positive refractive power, and its object-side surface is convex and its image-side surface is concave.

2. The optical lens according to claim 1, characterized in that: The effective focal length F1 of the first lens and the effective focal length F of the optical lens satisfy: -2.2≤F1 / F≤-1.

7.

3. The optical lens according to claim 1, characterized in that: The combined focal length F23 of the second lens and the third lens and the effective focal length F of the optical lens satisfy: -3.7≤F23 / F≤-2.

6.

4. The optical lens according to claim 1, characterized in that: The effective focal length F4 of the fourth lens and the effective focal length F of the optical lens satisfy: 1.4≤F4 / F≤1.

9.

5. The optical lens according to claim 1, characterized in that: The effective focal length F5 of the fifth lens and the effective focal length F of the optical lens satisfy: 1.1≤F5 / F≤1.

7.

6. The optical lens according to claim 1, characterized in that: The effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens satisfy: -1.5≤F5 / F6≤-1.

0.

7. The optical lens according to claim 1, characterized in that: The effective focal length F7 of the seventh lens and the effective focal length F of the optical lens satisfy: -0.9≤F7 / F≤-0.

7.

8. The optical lens according to claim 1, characterized in that: The effective focal length F8 of the eighth lens and the effective focal length F of the optical lens satisfy: 1.2≤F8 / F≤1.

4.

9. The optical lens according to claim 1, characterized in that: The combined focal length F78 of the seventh lens and the eighth lens and the effective focal length F of the optical lens satisfy the following condition: -3.9≤F78 / F≤-2.

4.

10. The optical lens according to claim 1, characterized in that: The effective focal length F9 of the ninth lens and the effective focal length F of the optical lens satisfy: 1≤F9 / F≤1.

2.

11. The optical lens according to claim 1, characterized in that: The combined focal length F910 of the ninth lens and the tenth lens and the effective focal length F of the optical lens satisfy the following: 1.3≤F910 / F≤1.

8.

12. The optical lens according to claim 1, characterized in that: The effective focal length F11 of the eleventh lens and the effective focal length F of the optical lens satisfy: 2.9≤F11 / F≤3.

9.

13. The optical lens according to any one of claims 1 to 12, characterized in that: The optical lens further comprises an aperture, and the lens located on the object side of the aperture constitutes a lens group with positive focal power, and the combined focal length FA of the lens group and the effective focal length F of the optical lens satisfy: 4.0≤FA / F≤7.

4.

14. The optical lens according to any one of claims 1 to 12, characterized in that: The maximum half image height IH of the optical lens and the distance TTL from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0<IH / TTL≤0.

1.

15. The optical lens according to any one of claims 1 to 12, characterized in that: The maximum half image height IH of the optical lens and the full aperture D1 of the first lens satisfy: 0.3≤IH / D1≤0.

5.

16. The optical lens according to any one of claims 1 to 12, characterized in that: The Abbe number VD1 of the first lens satisfies: VD1≥65.

17. The optical lens according to any one of claims 1 to 12, characterized in that: The Abbe number VD5 of the fifth lens satisfies: VD5≥35.

18. The optical lens according to any one of claims 1 to 12, characterized in that: The Abbe number VD8 of the eighth lens satisfies: VD8≥80.

19. The optical lens according to any one of claims 1 to 12, characterized in that: The object side surface of the first lens is convex, and the image side surface is concave; The object side surface of the second lens is concave, and the image side surface is concave; The object side surface of the fourth lens is convex, and the image side surface is convex; The object side surface of the fifth lens is a convex surface; The image side surface of the sixth lens is a concave surface; The object side surface of the seventh lens is concave, and the image side surface is concave; The object side surface of the eighth lens is convex, and the image side surface is convex; The object side surface of the ninth lens is convex, and the image side surface is convex.

Images