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 positive refractive power; a fourth lens with positive refractive power; a fifth lens with positive refractive power; a sixth lens with negative refractive power; a seventh lens with negative refractive power; an eighth lens with positive refractive power; a ninth lens with positive refractive power; a tenth lens with negative refractive power; and an eleventh lens with positive refractive power; wherein 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.

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 continuous advancement of existing image processing algorithms and AI technology, the types of prime lenses have become more diversified in recent years and are widely used in various fields such as intelligent transportation.

[0003] However, some existing optical lenses have small target surfaces, making it impossible to accommodate chips of larger sizes; others have low resolution, resulting in low image sharpness and severely impacting image quality; still others have poor light transmission, failing to meet the requirements for shooting in low-light environments; and some have significant optical distortion, making post-processing identification difficult. Therefore, existing optical lenses suffer from at least the following problems: small target surface, low resolution, poor light transmission, and significant optical distortion. Summary of the Invention

[0004] This 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 this application provides an optical lens comprising, along the optical axis from the object side to the image side, the following in sequence: a first lens having negative optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having positive optical power; a fifth lens having positive optical power; a sixth lens having negative optical power; a seventh lens having negative optical power; an eighth lens having positive optical power; a ninth lens having positive optical power; a tenth lens having negative optical power; and an eleventh lens having positive optical power; wherein the combined focal length F23 of the second and third lenses satisfies the following condition with respect to the effective focal length F of the optical lens: -3.7 ≤ F23 / F ≤ -2.6.

[0006] According to an exemplary embodiment of this 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 this 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 this 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.

[0009] According to an exemplary embodiment of this 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.

[0010] According to an exemplary embodiment of this 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.

[0011] According to an exemplary embodiment of this 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.

[0012] According to an exemplary embodiment of this 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.

[0013] According to an exemplary embodiment of this application, the combined focal length F78 of the seventh lens and the eighth lens satisfies the following condition with respect to the effective focal length F of the optical lens: -3.9 ≤ F78 / F ≤ -2.4.

[0014] According to an exemplary embodiment of this 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.

[0015] According to an exemplary embodiment of this application, the combined focal length F910 of the ninth lens and the tenth lens satisfies the effective focal length F of the optical lens: 1.3≤F910 / F≤1.8.

[0016] According to an exemplary embodiment of this 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.

[0017] According to an exemplary embodiment of this application, the optical lens further includes an aperture stop, and the lens located on the object side of the aperture stop constitutes a lens group with 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.

[0018] According to an exemplary embodiment of this application, the maximum half-image height IH of the optical lens and the distance TTL from the object side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0 < IH / TTL ≤ 0.1.

[0019] According to an exemplary embodiment of this application, the maximum half-image height IH of the optical lens and the full aperture D1 of the first lens satisfy the following condition: 0.3≤IH / D1≤0.5.

[0020] According to an exemplary embodiment of this application, the Abbe number VD1 of the first lens satisfies: VD1≥65.

[0021] According to an exemplary embodiment of this application, the Abbe number VD5 of the fifth lens satisfies: VD5≥35.

[0022] According to an exemplary embodiment of this application, the Abbe number VD8 of the eighth lens satisfies: VD8≥80. Attached Figure Description

[0023] 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:

[0024] Figure 1 This is a schematic diagram of the structure of an optical lens according to Embodiment 1 of this application;

[0025] Figure 2 This is a schematic diagram of the structure of an optical lens according to Embodiment 2 of this application;

[0026] Figure 3 This is a schematic diagram of the structure of an optical lens according to Embodiment 3 of this application; and

[0027] Figure 4 This is a schematic diagram of the structure of an optical lens according to Embodiment 4 of this application. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other. The following embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application.

[0035] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] 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 sequentially along the optical axis from the object side to the image side. Any adjacent lenses among the first to eleventh lenses may have a spacing distance, which may be an air gap.

[0037] 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 may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0038] In an exemplary embodiment, the optical lens further includes an aperture stop for limiting the light beam to further improve the image quality of the optical lens. Exemplarily, the aperture stop may be positioned between adjacent lenses and / or on the object side or image side of any of these lenses. It should be noted that the position of the aperture stop is merely an example and not a limitation; in alternative embodiments, the aperture stop may be positioned at other locations as needed.

[0039] In an exemplary embodiment, the first lens has negative optical power, and the object side is convex while the image side is concave, which is beneficial for further diverging light and effectively improving the illumination of the optical system.

[0040] In an exemplary embodiment, the second lens has negative optical power and the object side is concave, and the image side is concave, which can further reduce light deflection.

[0041] In an exemplary embodiment, the third lens has positive optical power and the object side and image side are both convex. When used in conjunction with the second lens, which has negative optical power, it can effectively correct chromatic aberration.

[0042] In an exemplary embodiment, the fourth lens has positive optical power and is convex on both the object side and the image side, which can effectively control the incident height of light and reduce tolerance sensitivity.

[0043] In an exemplary embodiment, the fifth lens has positive optical power, and the object side is convex, while the image side is either convex or concave.

[0044] In an exemplary embodiment, the sixth lens has negative optical power, and the object side is convex or concave, while the image side is concave. When used in conjunction with the fifth lens, which has positive optical power, it can effectively correct chromatic aberration or aberration of the system, improve imaging quality, and play a good balancing role in the high and low temperatures of the optical system.

[0045] In an exemplary embodiment, the seventh lens has negative optical power and the object side and image side are concave, which allows light rays passing through the seventh lens to be raised and smoothly enter the imaging surface, which is beneficial for achieving a large target surface.

[0046] In an exemplary embodiment, the eighth lens has positive optical power and is convex on both the object side and the image side. When used in conjunction with the seventh lens, which has negative optical power, it can further elevate the light rays so that they can smoothly enter the imaging surface. At the same time, it can effectively correct the chromatic aberration of the system and play a good balancing role in the high and low temperatures of the optical system.

[0047] In an exemplary embodiment, the ninth lens has positive optical power, and its object side and image side are both convex, which allows the elevated light rays to enter the imaging surface smoothly, reduces the system tolerance sensitivity, and plays a good balancing role in the high and low temperatures of the optical system.

[0048] In an exemplary embodiment, the tenth lens has negative optical power, and its object side is concave while its image side is convex. When cemented with the ninth lens, which has positive optical power, it can effectively correct system chromatic aberration and improve image quality.

[0049] In an exemplary embodiment, the eleventh lens has positive optical power, and its paraxial region has a convex object side and a concave image side, which can effectively collect light and allow light to reach the imaging surface smoothly.

[0050] 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 allocating the focal length value of the first lens, it is beneficial to allow light to enter the optical system in order to achieve a large target surface.

[0051] In an exemplary embodiment, the combined focal length F23 of the second and third lenses satisfies the effective focal length F of the optical lens: -3.7≤F23 / F≤-2.6. By reasonably allocating the combined focal length values ​​of the second and third lenses, the second and third lenses are matched to eliminate chromatic aberration, reduce spherical aberration, and improve resolution.

[0052] 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 allocating the focal length value of the fourth lens, it is beneficial to allow more light to enter the optical system smoothly, so as to achieve a large aperture and a large target surface.

[0053] 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 positive optical power. By reasonably allocating the focal length value of the fifth lens, it is beneficial to eliminate chromatic aberration, reduce spherical aberration, and improve resolution.

[0054] 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 positive optical power and works in conjunction with the sixth lens. By reasonably allocating the focal length values ​​of the fifth and sixth lenses, it is beneficial to eliminate chromatic aberration and improve resolution.

[0055] 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 negative optical power, and when used in conjunction with the eighth lens, the reasonable allocation of the focal length value of the seventh lens helps to eliminate chromatic aberration, reduce spherical aberration, and improve resolution.

[0056] 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.

[0057] In an exemplary embodiment, the combined focal length F78 of the seventh and eighth lenses satisfies the effective focal length F of the optical lens: -3.9≤F78 / F≤-2.4. The eighth lens has positive optical power, which allows the light rays passing through the seventh lens to be raised and smoothly enter the imaging surface, which is beneficial for achieving a large target surface. In conjunction with the seventh lens, by reasonably allocating the combined focal length values ​​of the seventh and eighth lenses, it is beneficial for correcting chromatic aberration and improving resolution.

[0058] 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 positive optical power. By reasonably allocating the focal length value of the ninth lens, the light rays passing through the seventh and eighth lenses are raised and smoothly enter the imaging surface, which is beneficial to achieving a large target surface and reducing the system tolerance sensitivity.

[0059] In an exemplary embodiment, the combined focal length F910 of the ninth and tenth lenses satisfies the effective focal length F of the optical lens: 1.3≤F910 / F≤1.8. The ninth lens has positive optical power, and in conjunction with the tenth lens, by reasonably allocating the combined focal length values ​​of the ninth and tenth lenses, the light rays passing through the seventh and eighth lenses are raised and smoothly enter the imaging surface, which is beneficial for achieving a large target surface, while reducing the system tolerance sensitivity and playing a good balancing role in the high and low temperatures of the optical system.

[0060] 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 positive optical power, and by reasonably allocating the focal length value of the eleventh lens, light can be effectively collected.

[0061] In an exemplary embodiment, the optical lens further includes an aperture stop, and the lenses located on the object side of the aperture stop constitute a lens group with 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. By reasonably allocating the focal length values ​​of the lens group, system chromatic aberration can be effectively corrected and image quality improved. As an example, the aperture stop can be positioned between the sixth lens and the seventh lens.

[0062] In an exemplary embodiment, the maximum half-image height IH of the optical lens and the distance TTL from the object side 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 half-image height and total length of the optical lens, it is beneficial to achieve miniaturization of the optical lens.

[0063] In an exemplary embodiment, the distance TTL between the object side of the first lens and the imaging surface of the optical lens on the optical axis satisfies: TTL≤95mm, which enables the optical lens to have a small size.

[0064] In an exemplary embodiment, the maximum half-image height IH of the optical lens and the full aperture D1 of the first lens satisfy the condition: 0.3≤IH / D1≤0.5. By reasonably controlling the half-image height of the optical lens and the full aperture of the first lens, it is beneficial to achieve miniaturization of the optical lens.

[0065] 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 it can play a good balancing role in the high and low temperatures of the optical lens. As an example, the Abbe number VD1 of the first lens can satisfy: 85≥VD1≥65.

[0066] 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.

[0067] 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 it can play a good balancing role in the high and low temperatures of the optical lens. As an example, the Abbe number VD8 of the eighth lens can satisfy: 95 ≥ VD8 ≥ 80.

[0068] In an exemplary embodiment, the aperture number FNO of the optical lens of this application is ≤1.25. By controlling the aperture number, a large aperture is effectively achieved, improving the light transmission performance of the optical lens. As an example, the aperture number FNO of the optical lens can satisfy 1.15≤FNO≤1.25.

[0069] In an exemplary embodiment, the maximum holographic height of the optical lens of this application can reach 17.6 mm, and the illuminance is ≥40%, effectively realizing a large target area and high illuminance for the optical lens.

[0070] In an exemplary embodiment, the optical distortion of the optical lens of this application is between -10% and 0%. Low distortion of the optical lens can be achieved through the design of the overall structure of the optical lens of this application.

[0071] In an exemplary embodiment, the optical lens of this application has high-definition imaging quality and high resolution for visible light in the wavelength range of 435–656 nm.

[0072] In an exemplary embodiment, the optical lens of this application may, as needed, include a filter and / or protective glass disposed between the eleventh lens and the imaging surface. The filter can filter light of different wavelengths, and the protective glass can prevent damage to the image-side elements (e.g., chips) of the optical lens.

[0073] The optical lens of this application may employ multiple lenses, such as eleven. 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 are described as an example in the embodiments, the optical lens is not limited to including eleven lenses. If necessary, the optical lens may also include other numbers of lenses. It should also be noted that the multiple lenses used in the optical lens of this application can be spherical lenses or aspherical lenses. For example, all eleven lenses may be spherical lenses.

[0074] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0075] Example 1

[0076] Figure 1 A schematic diagram of the optical lens of Embodiment 1 of this application is shown. Figure 1 As shown, the optical lens includes, in sequence from the object side to the image side, 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.

[0077] The first lens L1 has negative optical power, with its object side S1 being convex and its image side S2 being concave.

[0078] The second lens L2 has negative optical power, and its object side S3 is concave, as is its image side S4.

[0079] The third lens L3 has positive optical power, and its object side S4 is convex, while its image side S5 is convex.

[0080] The fourth lens L4 has positive optical power, and its object side S6 is convex, and its image side S7 is convex.

[0081] The fifth lens L5 has positive optical power, with its object side S8 being convex and its image side S9 being concave.

[0082] The sixth lens L6 has negative optical power, with its object side S9 being convex and its image side S10 being concave.

[0083] The seventh lens L7 has negative optical power, and its object side S12 is concave, and its image side S13 is concave.

[0084] The eighth lens L8 has positive optical power, and its object side S13 is convex, and its image side S14 is convex.

[0085] The ninth lens L9 has positive optical power, and its object side S15 is convex, and its image side S16 is convex.

[0086] The tenth lens L10 has negative optical power, with its object side S16 being concave and its image side S17 being convex.

[0087] The eleventh lens L11 has positive optical power, with its object-side surface S18 being convex and its image-side surface S19 being concave.

[0088] The shapes of the object-side or image-side surfaces of the lenses described above all indicate the paraxial region of the lens surface.

[0089] 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.

[0090] The optical lens also includes an aperture stop STO (plane S11), which can be positioned between the sixth lens L6 and the seventh lens L7, exemplarily closer to the sixth lens L6.

[0091] The aperture number (FNO) of this optical lens is 1.21.

[0092] The optical lens may also include a filter (not shown) having an object-side side and an image-side side, and / or a protective glass having an object-side side S20 and an image-side side S21. The filter can be used to correct color deviation, and the protective glass can be used to protect the image sensor chip located at the imaging surface IMAGE. Light from the object passes sequentially through each surface S1 to S21 and is finally imaged on the imaging surface IMAGE.

[0093] Table 1 shows the radius of curvature, thickness / distance, refractive index, and Abbe number of each lens in the optical lens of Example 1, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0094]

[0095] Table 1

[0096] In Embodiment 1, all eleven lenses in the optical lens are spherical lenses. By rationally setting the surface shape and parameters of each lens, and through the cooperation of each lens, the optical lens of this application has the characteristics of large aperture, large target surface, and high sharpness, making it suitable for shooting under different lighting and temperature conditions. At the same time, it effectively optimizes and balances chromatic aberration and reduces ghosting.

[0097] Example 2

[0098] Figure 2 A schematic diagram of the optical lens structure of Embodiment 2 of this application is shown. Figure 2 As shown, the optical lens includes, in sequence from the object side to the image side, 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.

[0099] The first lens L1 has negative optical power, with its object side S1 being convex and its image side S2 being concave.

[0100] The second lens L2 has negative optical power, and its object side S3 is concave, as is its image side S4.

[0101] The third lens L3 has positive optical power, and its object side S4 is convex, while its image side S5 is convex.

[0102] The fourth lens L4 has positive optical power, and its object side S6 is convex, and its image side S7 is convex.

[0103] The fifth lens L5 has positive optical power, with its object side S8 being convex and its image side S9 being concave.

[0104] The sixth lens L6 has negative optical power, with its object side S9 being convex and its image side S10 being concave.

[0105] The seventh lens L7 has negative optical power, and its object side S12 is concave, and its image side S13 is concave.

[0106] The eighth lens L8 has positive optical power, and its object side S13 is convex, and its image side S14 is convex.

[0107] The ninth lens L9 has positive optical power, and its object side S15 is convex, and its image side S16 is convex.

[0108] The tenth lens L10 has negative optical power, with its object side S16 being concave and its image side S17 being convex.

[0109] The eleventh lens L11 has positive optical power, with its object-side surface S18 being convex and its image-side surface S19 being concave.

[0110] The shapes of the object-side or image-side surfaces of the lenses described above all indicate the paraxial region of the lens surface.

[0111] 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.

[0112] The optical lens also includes an aperture stop STO (plane S11), which can be positioned between the sixth lens L6 and the seventh lens L7, exemplarily closer to the seventh lens L7.

[0113] The aperture number (FNO) of this optical lens is 1.21.

[0114] The optical lens may also include a filter (not shown) having an object-side side and an image-side side, and / or a protective glass having an object-side side S20 and an image-side side S21. The filter can be used to correct color deviation, and the protective glass can be used to protect the image sensor chip located at the imaging surface IMAGE. Light from the object passes sequentially through each surface S1 to S21 and is finally imaged on the imaging surface IMAGE.

[0115] Table 2 shows the radius of curvature, thickness / distance, refractive index, and Abbe number of each lens in the optical lens of Example 2, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0116]

[0117]

[0118] Table 2

[0119] In Embodiment 2, all eleven lenses in the optical lens are spherical lenses. By rationally setting the surface shape and parameters of each lens, and through the cooperation of each lens, the optical lens of this application has the characteristics of large aperture, large target surface, and high sharpness, making it suitable for shooting under different lighting and temperature conditions. At the same time, it effectively optimizes and balances chromatic aberration and reduces ghosting.

[0120] Example 3

[0121] Figure 3 A schematic diagram of the optical lens of Embodiment 3 of this application is shown. Figure 3 As shown, the optical lens includes, in sequence from the object side to the image side, 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.

[0122] The first lens L1 has negative optical power, with its object side S1 being convex and its image side S2 being concave.

[0123] The second lens L2 has negative optical power, and its object side S3 is concave, as is its image side S4.

[0124] The third lens L3 has positive optical power, and its object side S4 is convex, while its image side S5 is convex.

[0125] The fourth lens L4 has positive optical power, and its object side S6 is convex, and its image side S7 is convex.

[0126] The fifth lens L5 has positive optical power, with its object side S8 being convex and its image side S9 being concave.

[0127] The sixth lens L6 has negative optical power, with its object side S9 being convex and its image side S10 being concave.

[0128] The seventh lens L7 has negative optical power, and its object side S12 is concave, and its image side S13 is concave.

[0129] The eighth lens L8 has positive optical power, and its object side S13 is convex, and its image side S14 is convex.

[0130] The ninth lens L9 has positive optical power, and its object side S15 is convex, and its image side S16 is convex.

[0131] The tenth lens L10 has negative optical power, with its object side S16 being concave and its image side S17 being convex.

[0132] The eleventh lens L11 has positive optical power, with its object-side surface S18 being convex and its image-side surface S19 being concave.

[0133] The shapes of the object-side or image-side surfaces of the lenses described above all indicate the paraxial region of the lens surface.

[0134] 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.

[0135] The optical lens also includes an aperture stop STO (plane S11), which can be positioned between the sixth lens L6 and the seventh lens L7, exemplarily closer to the seventh lens L7.

[0136] The aperture number (FNO) of this optical lens is 1.21.

[0137] The optical lens may also include a filter (not shown) having an object-side side and an image-side side, and / or a protective glass having an object-side side S20 and an image-side side S21. The filter can be used to correct color deviation, and the protective glass can be used to protect the image sensor chip located at the imaging surface IMAGE. Light from the object passes sequentially through each surface S1 to S21 and is finally imaged on the imaging surface IMAGE.

[0138] Table 3 shows the radius of curvature, thickness / distance, refractive index, and Abbe number of each lens in the optical lens of Example 3, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0139]

[0140] Table 3

[0141] In Example 3, all eleven lenses in the optical lens are spherical lenses. By rationally setting the surface shape and parameters of each lens, and through the cooperation of each lens, the optical lens of this application has the characteristics of large aperture, large target surface, and high sharpness, making it suitable for shooting under different lighting and temperature conditions. At the same time, it effectively optimizes and balances chromatic aberration and reduces ghosting.

[0142] Example 4

[0143] Figure 4 A schematic diagram of the optical lens of Embodiment 4 of this application is shown. Figure 4 As shown, the optical lens includes, in sequence from the object side to the image side, 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.

[0144] The first lens L1 has negative optical power, with its object side S1 being convex and its image side S2 being concave.

[0145] The second lens L2 has negative optical power, and its object side S3 is concave, as is its image side S4.

[0146] The third lens L3 has positive optical power, and its object side S4 is convex, while its image side S5 is convex.

[0147] The fourth lens L4 has positive optical power, and its object side S6 is convex, and its image side S7 is convex.

[0148] The fifth lens L5 has positive optical power, with its object side S8 being convex and its image side S9 being concave.

[0149] The sixth lens L6 has negative optical power, with its object side S9 being convex and its image side S10 being concave.

[0150] The seventh lens L7 has negative optical power, and its object side S12 is concave, and its image side S13 is concave.

[0151] The eighth lens L8 has positive optical power, and its object side S13 is convex, and its image side S14 is convex.

[0152] The ninth lens L9 has positive optical power, and its object side S15 is convex, and its image side S16 is convex.

[0153] The tenth lens L10 has negative optical power, with its object side S16 being concave and its image side S17 being convex.

[0154] The eleventh lens L11 has positive optical power, with its object-side surface S18 being convex and its image-side surface S19 being concave.

[0155] The shapes of the object-side or image-side surfaces of the lenses described above all indicate the paraxial region of the lens surface.

[0156] 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.

[0157] The optical lens also includes an aperture stop STO (plane S11), which can be positioned between the sixth lens L6 and the seventh lens L7, exemplarily closer to the seventh lens L7.

[0158] The aperture number of this optical lens is FNO 1.25.

[0159] The optical lens may also include a filter (not shown) having an object-side side and an image-side side, and / or a protective glass having an object-side side S20 and an image-side side S21. The filter can be used to correct color deviation, and the protective glass can be used to protect the image sensor chip located at the imaging surface IMAGE. Light from the object passes sequentially through each surface S1 to S21 and is finally imaged on the imaging surface IMAGE.

[0160] Table 4 shows the radius of curvature, thickness / distance, refractive index, and Abbe number of each lens in the optical lens of Example 4, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0161]

[0162]

[0163] Table 4

[0164] In Example 4, all eleven lenses in the optical lens are spherical lenses. By rationally setting the surface shape and parameters of each lens, and through the cooperation of each lens, the optical lens of this application has the characteristics of large aperture, large target surface, and high sharpness, making it suitable for shooting under different lighting and temperature conditions. At the same time, it effectively optimizes and balances chromatic aberration and reduces ghosting.

[0165] In summary, Examples 1 to 4 satisfy the relationships shown in Table 5 below.

[0166]

[0167]

[0168] Table 5

[0169] 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, includes: a first lens with negative refractive power; a second lens with negative refractive power; a third lens with positive refractive power; a fourth lens with positive refractive power; a fifth lens with positive refractive power; a sixth lens with negative refractive power; a seventh lens with negative refractive power; an eighth lens with positive refractive power; a ninth lens with positive refractive power; a tenth lens with negative refractive power; and an eleventh lens with positive refractive power; The optical lens has eleven lenses with refractive power; Wherein, 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.

2. The optical lens of claim 1, wherein, 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 of claim 1, wherein, 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.

4. The optical lens of claim 1, wherein, 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.

5. The optical lens of claim 1, wherein, 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.

6. The optical lens of claim 1, wherein, 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.

7. The optical lens of claim 1, wherein, 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.

8. The optical lens of claim 1, wherein, 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.

9. The optical lens of claim 1, wherein, 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.

10. The optical lens of claim 1, wherein, 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.

11. The optical lens of claim 1, wherein, 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.

12. The optical lens of any of claims 1-11, wherein, The optical lens further comprises a stop, the lenses located on the object side of the stop constitute a lens group with positive refractive 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.

13. The optical lens of any of claims 1-11, wherein, The maximum half 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 14. The optical lens of any of claims 1-11, wherein, 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.

15. The optical lens of any of claims 1-11, wherein, The Abbe number VD1 of the first lens satisfies: VD1≥65.

16. The optical lens of any of claims 1-11, wherein, The Abbe number VD5 of the fifth lens satisfies: VD5≥35.

17. The optical lens of any of claims 1-11, wherein, The Abbe number VD8 of the eighth lens satisfies: VD8≥80.

18. The optical lens according to any one of claims 1-11, wherein, 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 a concave surface, and the image side surface is a concave surface; The object side surface of the third lens is a convex surface, and the image side surface is a convex surface The object side surface of the fourth lens is a convex surface, and the image side surface is a convex surface; 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 a concave surface, and the image side surface is a concave surface; The object side surface of the eighth lens is a convex surface, and the image side surface is a convex surface; The object side surface of the ninth lens is a convex surface, and the image side surface is a convex surface; The object side surface of the tenth lens is a concave surface, and the image side surface is a convex surface; The object side surface of the eleventh lens is a convex surface, and the image side surface is a concave surface.

19. The optical lens of any of claims 1-11, wherein, The optical lens satisfies at least one of the following conditions: -3.32≤F23 / F≤-3.15; -1.94≤F1 / F≤-1.86; 1.57≤F4 / F≤1.64; 1.43≤F5 / F≤1.56; -1.33≤F5 / F6≤-1.29; -0.84≤F7 / F≤-0.79; 1.22≤F8 / F≤1.35; -3.35≤F78 / F≤-2.63; 1.06≤F9 / F≤1.15; 1.44≤F910 / F≤1.57; 3.22≤F11 / F≤3.57; 4.39≤FA / F≤5.29; 0<IH / TTL≤0.09; 0.37≤IH / D1≤0.39; 65≤VD1≤85; 35≤VD5≤50; 80≤VD8≤95; Wherein, F1 is the effective focal length of the first lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, F78 is the combined focal length of the seventh lens and the eighth lens, F9 is the effective focal length of the ninth lens, F910 is the combined focal length of the ninth lens and the tenth lens, F11 is the effective focal length of the eleventh lens, IH is the maximum half image height of the optical lens, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, D1 is the full aperture of the first lens, VD1 is the Abbe number of the first lens, VD5 is the Abbe number of the fifth lens, VD8 is the Abbe number of the eighth lens, and the optical lens further comprises a diaphragm, the lens located on the object side of the diaphragm constitutes a lens group with positive focal power, and FA is the combined focal length of the lens group.

Images