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, a fifth lens and a sixth lens from an object side to an image side along an optical axis, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the object side surface of the third lens is a convex surface; the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the sixth lens has positive focal power; the seventh lens has negative focal power; the eighth lens has positive focal power; the ninth lens has positive focal power; and a tenth lens having a negative focal power.

Description

Technical Field

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

[0002] For a telephoto lens, its usage scenario is to observe the details of an object, and the object side field of view is small, so it needs to have a longer focal length; in addition, to be compatible with more usage environments with insufficient lighting, such as night scenes, dusk, rainy days, etc., the telephoto lens needs to meet the requirement of a large aperture; to meet the needs of night observation, the telephoto lens needs to meet the requirement of infrared confocality; and to meet the need to distinguish tiny details, the telephoto lens also needs to meet the requirement of high image quality.

[0003] The existing telephoto lenses have the following problems: 1) It is difficult to achieve a large aperture; 2) It is difficult to correct chromatic aberration and it is difficult to achieve infrared confocality; 3) It is difficult to achieve both a large aperture and high image quality. Therefore, the market is in urgent need of an optical lens that can achieve at least one of the following characteristics: long focal length, large aperture, infrared confocality, and high image quality. Utility Model Content

[0004] The present application provides an optical lens, which comprises a first lens with positive optical power; a second lens with negative optical power, whose object side surface is concave and whose image side surface is convex; a third lens with optical power, whose object side surface is convex; a fourth lens with optical power, whose image side surface is convex; a fifth lens with negative optical power, whose object side surface is convex and whose image side surface is concave; a sixth lens with positive optical power; a seventh lens with negative optical power; an eighth lens with positive optical power; a ninth lens with positive optical power; and a tenth lens with negative optical power.

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

[0006] In one embodiment, the maximum full aperture Dmax of the optical lens and the total optical length TTL of the optical lens satisfy: 0.3≤Dmax / TTL≤0.6.

[0007] In one embodiment, the total optical length TTL of the optical lens and the total focal length F of the optical lens satisfy: 1.6≤TTL / F≤2.3.

[0008] In one embodiment, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: 1.1≤F / ENPD≤1.4.

[0009] In one embodiment, the back focus BFL of the optical lens and the total optical length TTL of the optical lens satisfy: 0.1≤BFL / TTL≤0.3.

[0010] In one embodiment, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy: 2.0≤F1 / F≤4.3.

[0011] In one embodiment, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy: -2.7≤F2 / F≤-1.6.

[0012] In one embodiment, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy: -3.3≤F3 / F≤1.0.

[0013] In one embodiment, the focal length F4 of the fourth lens and the total focal length F of the optical lens satisfy: -2.3≤F4 / F≤1.2.

[0014] In one embodiment, the focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy: -1.2≤F5 / F≤-0.6.

[0015] In one embodiment, the focal length F6 of the sixth lens and the total focal length F of the optical lens satisfy: 0.4≤F6 / F≤0.7.

[0016] In one embodiment, the focal length F7 of the seventh lens and the total focal length F of the optical lens satisfy: -1.0≤F7 / F≤-0.3.

[0017] In one embodiment, the focal length F8 of the eighth lens and the total focal length F of the optical lens satisfy: 0.5≤F8 / F≤1.1.

[0018] In one embodiment, the focal length F9 of the ninth lens and the total focal length F of the optical lens satisfy: 0.2≤F9 / F≤1.1.

[0019] In one embodiment, the focal length F10 of the tenth lens and the total focal length F of the optical lens satisfy: -0.8≤F10 / F≤-0.1.

[0020] In one embodiment, the combined focal length F34 of the third lens and the fourth lens and the total focal length F of the optical lens satisfy: 0.8≤F34 / F≤1.3.

[0021] In one embodiment, the combined focal length F567 of the fifth lens, the sixth lens, and the seventh lens and the total focal length F of the optical lens satisfy: -3.5≤F567 / F≤-0.4.

[0022] In one embodiment, the combined focal length F34 of the third lens and the fourth lens and the combined focal length F567 of the fifth lens, the sixth lens and the seventh lens satisfy: -1.9≤F34 / F567≤-0.1.

[0023] In one embodiment, the combined focal length FI of the first lens to the seventh lens and the total focal length F of the optical lens satisfy: 1.7≤FI / F≤9.3.

[0024] In one embodiment, the combined focal length FII of the eighth lens to the tenth lens and the total focal length F of the optical lens satisfy: 0.4≤FII / F≤2.0.

[0025] In one embodiment, the Abbe number VD6 of the sixth lens satisfies: 90≤VD6≤100.

[0026] In one embodiment, the refractive index ND9 of the ninth lens satisfies: 1.7≤ND9≤2.2.

[0027] In one embodiment, the optical lens further includes an eleventh lens located between the tenth lens and the imaging plane of the optical lens, wherein the eleventh lens has positive optical power.

[0028] In one embodiment, the object-side surface of the eleventh lens is convex, and the image-side surface is concave.

[0029] In one embodiment, the focal length F11 of the eleventh lens and the total focal length F of the optical lens satisfy: 1.8≤F11 / F≤3.7.

[0030] In one embodiment, the combined focal length FII' of the eighth lens to the eleventh lens and the total focal length F of the optical lens satisfy: 0.4≤FII' / F≤2.0.

[0031] The optical lens provided in the present application has at least one beneficial effect such as long focal length, large aperture, infrared confocality, and high image quality by optimizing the shape of each lens, the optical focal length, and the reasonable setting of related parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings, in which:

[0033] Figure 1 A schematic diagram showing the structure of an optical lens according to Embodiment 1 of the present application;

[0034] Figure 2 A schematic diagram showing the structure of an optical lens according to Embodiment 2 of the present application;

[0035] Figure 3A schematic diagram showing the structure of an optical lens according to Embodiment 3 of the present application;

[0036] Figure 4 A schematic diagram showing the structure of an optical lens according to Embodiment 4 of the present application;

[0037] Figure 5 A schematic diagram showing the structure of an optical lens according to Example 5 of the present application. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numbers refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0039] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0040] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0041] In this article, 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 subject 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.

[0042] It should also be understood that the terms "comprises", "including", "having", "includes" 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. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0043] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] The features, principles and other aspects of the present application are described in detail below.

[0046] In an exemplary embodiment, the optical lens includes, for example, ten lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens, which are arranged in sequence from the object side to the image side along the optical axis.

[0047] In an exemplary embodiment, the optical lens includes, for example, eleven lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens. The eleven lenses are arranged in sequence from the object side to the image side along the optical axis.

[0048] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the image side of the last lens. When the optical lens includes ten lenses with optical power, the last lens is the tenth lens, and when the optical lens includes eleven lenses with optical power, the last lens is the eleventh lens. Optionally, the photosensitive element disposed on the image side of the last lens may be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0049] In an exemplary embodiment, an aperture for limiting the light beam may be provided between the first lens and the second lens to further improve the imaging quality of the optical lens. The aperture is conducive to converging the light entering the optical lens, reducing the aperture of the optical lens, and reducing the assembly sensitivity of the system. In an embodiment of the present application, the aperture may be provided near the image side of the first lens. However, it should be noted that the position of the aperture disclosed herein is only an example and not a limitation; in alternative embodiments, the aperture may also be provided at other positions according to actual needs.

[0050] In an exemplary embodiment, the third lens and the fourth lens may form a doublet lens, wherein the image side surface of the third lens is glued together with the object side surface of the fourth lens. The third lens has negative optical power, and the fourth lens has positive optical power, or the third lens has positive optical power, and the fourth lens has negative optical power. The third lens or the fourth lens with positive optical power in the doublet lens may be made of a material with a larger Abbe number, which is beneficial to reduce the generation of chromatic aberration and achieve high image quality; a material with large abnormal dispersion may also be selected, which is beneficial to correct chromatic aberration and achieve infrared defocus. The third lens or the fourth lens has a large positive optical power and a large aperture, which is beneficial to correct the axial chromatic aberration of a large aperture and achieve a large aperture; the third lens and the fourth lens correct their own aberrations by matching materials and optical power, which is beneficial to reduce tolerance sensitivity.

[0051] In an exemplary embodiment, the fifth lens, the sixth lens and the seventh lens may form a triplet lens, wherein the image side surface of the fifth lens is glued together with the object side surface of the sixth lens, and the image side surface of the sixth lens is glued together with the object side surface of the seventh lens. The fifth lens may have a negative optical power, the sixth lens may have a positive optical power, and the seventh lens may have a negative optical power. Among them, the sixth lens with a positive optical power may be selected from a material with a larger Abbe number, which is conducive to reducing the generation of chromatic aberration and achieving high image quality; a material with large abnormal dispersion may also be selected, which is conducive to correcting chromatic aberration and achieving infrared defocusing. The curvature of the object side surface of the fifth lens and the image side surface of the seventh lens are similar. The triplet lens composed of the fifth lens, the sixth lens and the seventh lens is in a meniscus shape as a whole, and the optical power is small, which is conducive to reducing the generation of spherical aberration; the fifth lens, the sixth lens and the seventh lens correct their own aberrations through the combination of materials and optical power, which is conducive to reducing tolerance sensitivity.

[0052] In an exemplary embodiment, the ninth lens and the tenth lens may form a doublet lens, and the image side surface of the ninth lens is glued together with the object side surface of the tenth lens. The ninth lens may have positive optical power, and the tenth lens may have negative optical power. The doublet lens composed of the ninth lens and the tenth lens is close to the image plane and far away from the aperture, which is conducive to correcting the residual off-axis aberration; the curvature of the object side surface of the ninth lens and the image side surface of the tenth lens is similar, and the doublet lens composed of the ninth lens and the tenth lens is in a meniscus shape as a whole, and the optical power is small, which is conducive to reducing the generation of spherical aberration; the ninth lens and the tenth lens correct their own aberrations through the combination of materials and optical power, which is conducive to reducing tolerance sensitivity.

[0053] In an exemplary embodiment, the first lens may have positive optical power and bear the main optical power of the system. Light can be collected through the first lens, so that the outgoing light of the first lens is close to the optical axis, reducing the aperture of the rear lens, which is conducive to miniaturization.

[0054] In an exemplary embodiment, the image side surface of the first lens is convex, and the image side surface is concave. The first lens is a convex-concave meniscus shape, so that the light is bent toward the image surface along the trend, which is conducive to reducing the deflection angle of the light, reducing the incident angle of the axial light, reducing the generation of spherical aberration, and is conducive to achieving high image quality.

[0055] In an exemplary embodiment, the first lens may be made of a material with a large anomalous dispersion value, which is conducive to achieving wide-spectrum apochromatism and infrared confocality; the first lens may be made of a high-refractive-index material, which is conducive to increasing the positive focal power of the first lens, reducing the surface curvature, and reducing the generation of aberrations, thereby facilitating the realization of high image quality.

[0056] In an exemplary embodiment, the second lens may have negative power. On the one hand, the second lens with negative power may introduce positive spherical aberration to balance the negative spherical aberration generated by the first lens and the fourth lens; on the other hand, the second lens with negative power may smooth the angle of the outgoing light, which is beneficial to increase the light height of the third lens and the fourth lens, correct the axial chromatic aberration, and is beneficial to achieve high image quality.

[0057] In an exemplary embodiment, the object side surface of the second lens is a concave surface, and the image side surface is a convex surface. The object side surface of the second lens is a concave surface, which bears the main negative optical power, so that the light emitted from the object side surface of the second lens is in a beam expansion state, and the light is smoothly entered into the image side surface of the second lens, reducing the generation of spherical aberration of the image side surface of the second lens, which is conducive to achieving high image quality.

[0058] In an exemplary embodiment, the third lens may have negative optical power, and its object side surface is convex, which is beneficial to reduce the incident angle of axial light and reduce the generation of spherical aberration, thereby facilitating the realization of high image quality.

[0059] In an exemplary embodiment, the third lens may have negative optical power and a convex-concave meniscus shape, which is curved toward the image plane, which is beneficial for correcting its own spherical aberration and reducing the generation of spherical aberration, thereby facilitating the realization of high image quality.

[0060] In an exemplary embodiment, the third lens and the fourth lens may form a doublet lens, wherein the image side surface of the third lens is cemented together with the object side surface of the fourth lens. The third lens has negative optical power in the doublet lens, and cooperates with the fourth lens to achieve correction of apochromatism and spherical aberration, which is conducive to achieving high image quality.

[0061] In an exemplary embodiment, the third lens may have positive optical power, and its object side surface is convex, which is beneficial to reduce the incident angle of axial light and reduce the generation of spherical aberration, thereby facilitating the realization of high image quality.

[0062] In an exemplary embodiment, the third lens may have positive optical power, and its object side surface and image side surface are both convex, that is, the object side surface and the image side surface share the optical power, reducing the surface curvature and the generation of aberrations, which is conducive to achieving high image quality.

[0063] In an exemplary embodiment, the third lens may be made of a material with a high Abbe number, which can reduce the generation of chromatic aberration and facilitate the realization of high image quality.

[0064] In an exemplary embodiment, the third lens may be made of a material with large anomalous dispersion, which is beneficial for achieving wide-spectrum apochromatism and infrared confocality.

[0065] In an exemplary embodiment, the third lens and the fourth lens may form a doublet lens, wherein the image side surface of the third lens is cemented together with the object side surface of the fourth lens. The third lens has positive power in the doublet lens, and cooperates with the fourth lens to correct apochromatic aberration and spherical aberration, which is conducive to achieving high image quality.

[0066] In an exemplary embodiment, the fourth lens may have positive refractive power, and its object side surface is convex, which can reduce the incident angle of the axial light and reduce the generation of spherical aberration, which is conducive to achieving high image quality;

[0067] In an exemplary embodiment, the fourth lens may have positive optical power, and its object side surface and image side surface are both convex, that is, the object side surface and the image side surface share the optical power, reducing the surface curvature and reducing the generation of aberrations, which is conducive to achieving high image quality.

[0068] In an exemplary embodiment, the fourth lens may be made of a material with a high Abbe number, which can reduce the generation of chromatic aberration and facilitate the realization of high image quality.

[0069] In an exemplary embodiment, the fourth lens may be made of a material with large anomalous dispersion, which is beneficial for achieving wide-spectrum apochromatism and infrared confocality.

[0070] In an exemplary embodiment, the third lens and the fourth lens may form a doublet lens, wherein the image side surface of the third lens is cemented together with the object side surface of the fourth lens. The fourth lens has positive power in the doublet lens, and cooperates with the third lens to correct apochromatic aberration and spherical aberration, which is conducive to achieving high image quality.

[0071] In an exemplary embodiment, the fourth lens may have negative optical power and introduce positive spherical aberration to balance the negative spherical aberration generated by the first lens and the third lens, which is beneficial to achieving high image quality.

[0072] In an exemplary embodiment, the third lens and the fourth lens may form a doublet lens, wherein the image side surface of the third lens is cemented together with the object side surface of the fourth lens. The fourth lens has negative optical power in the doublet lens, and cooperates with the third lens to correct apochromatic aberration and spherical aberration, which is conducive to achieving high image quality.

[0073] In an exemplary embodiment, the fifth lens may have negative optical power, with a convex object side and a concave image side. Such a configuration of the fifth lens can reduce the incident angle of the axial light, reduce the generation of spherical aberration, and facilitate the realization of high image quality.

[0074] In an exemplary embodiment, the fifth lens, the sixth lens, and the seventh lens may form a triplet lens, wherein the image side surface of the fifth lens is cemented with the object side surface of the sixth lens, and the image side surface of the sixth lens is cemented with the object side surface of the seventh lens. The fifth lens has negative power in the triplet lens, and cooperates with the sixth lens and the seventh lens to achieve correction of apochromatism and spherical aberration, which is conducive to achieving high image quality.

[0075] In an exemplary embodiment, the sixth lens may have positive refractive power, and its object-side surface and image-side surface are both convex, which share the optical power, reduce the surface curvature, reduce the generation of aberrations, and are conducive to achieving high image quality.

[0076] In an exemplary embodiment, the object side surface of the sixth lens is a convex surface, which can reduce the incident angle of the axial light and reduce the generation of spherical aberration, which is conducive to achieving high image quality.

[0077] In an exemplary embodiment, the sixth lens may be made of a material with a high Abbe number to reduce the generation of chromatic aberration, which is beneficial to achieving high image quality.

[0078] In an exemplary embodiment, the sixth lens may be made of a material with large anomalous dispersion, which is beneficial for achieving wide-spectrum apochromatism and infrared confocality.

[0079] In an exemplary embodiment, the fifth lens, the sixth lens, and the seventh lens may form a triplet lens, wherein the image side surface of the fifth lens is cemented with the object side surface of the sixth lens, and the image side surface of the sixth lens is cemented with the object side surface of the seventh lens. The sixth lens has positive power in the triplet lens, and cooperates with the fifth lens and the seventh lens to achieve correction of apochromatism and spherical aberration, which is conducive to achieving high image quality.

[0080] In an exemplary embodiment, the seventh lens may have negative optical power, and its object-side surface and image-side surface are both concave, which share the optical power, reduce the surface curvature, reduce the generation of aberrations, and facilitate achieving high image quality.

[0081] In an exemplary embodiment, the image-side surface of the seventh lens element may be a concave surface, which can reduce the incident angle of axial light and reduce the generation of spherical aberration, thereby facilitating the realization of high image quality.

[0082] In an exemplary embodiment, the image-side surface of the seventh lens element may be a convex surface, which generates positive spherical aberration, and is beneficial for correcting system aberrations and achieving high image quality.

[0083] In an exemplary embodiment, the seventh lens may be made of a high refractive index material to increase the negative optical power and reduce the surface curvature, which is beneficial to reduce the generation of aberrations and achieve high image quality.

[0084] In an exemplary embodiment, the fifth lens, the sixth lens, and the seventh lens may form a triplet lens, wherein the image side surface of the fifth lens is cemented with the object side surface of the sixth lens, and the image side surface of the sixth lens is cemented with the object side surface of the seventh lens. The seventh lens has negative power in the triplet lens, and cooperates with the fifth lens and the sixth lens to achieve correction of apochromatism and spherical aberration, which is conducive to achieving high image quality.

[0085] In an exemplary embodiment, the eighth lens may have positive refractive power, and its object-side surface and image-side surface are both convex, which share the optical power, reduce the surface curvature, reduce the generation of aberrations, and are conducive to achieving high image quality.

[0086] In an exemplary embodiment, the image-side surface of the eighth lens may be a concave surface, which reduces the incident angle of axial light and reduces the generation of spherical aberration, thereby facilitating the realization of high image quality.

[0087] In an exemplary embodiment, the eighth lens may be made of a high refractive index material to increase the positive optical power, reduce the surface curvature, and reduce the generation of aberrations, which is conducive to achieving high image quality.

[0088] In an exemplary embodiment, the ninth lens element may have positive refractive power, and its object-side surface and image-side surface are both convex, which share the refractive power, reduce the surface curvature, reduce the generation of aberrations, and facilitate achieving high image quality.

[0089] In an exemplary embodiment, the image-side surface of the ninth lens element may be a concave surface, so as to reduce the incident angle of the axial light and reduce the generation of spherical aberration, thereby facilitating the realization of high image quality.

[0090] In an exemplary embodiment, the ninth lens element may be made of a high refractive index material to increase the positive optical power, reduce the surface curvature, and reduce the generation of aberrations, which is conducive to achieving high image quality.

[0091] In an exemplary embodiment, the ninth lens and the tenth lens may form a cemented lens, wherein the image side surface of the ninth lens is cemented with the object side surface of the tenth lens. The ninth lens has positive power in the double cemented lens, and cooperates with the tenth lens to correct off-axis chromatic aberration, which is conducive to achieving high image quality.

[0092] In an exemplary embodiment, the tenth lens may have negative optical power, and its object-side surface and image-side surface are both concave, which share the optical power, reduce the surface curvature, reduce the generation of aberrations, and facilitate achieving high image quality.

[0093] In an exemplary embodiment, the image-side surface of the tenth lens is a concave surface, which can reduce the incident angle of the axial light and reduce the generation of spherical aberration, thereby facilitating the realization of high image quality.

[0094] In an exemplary embodiment, the ninth lens and the tenth lens may form a cemented lens, wherein the image side surface of the ninth lens is cemented with the object side surface of the tenth lens. The tenth lens has negative optical power in the double cemented lens, and cooperates with the ninth lens to correct off-axis chromatic aberration, which is conducive to achieving high image quality.

[0095] In an exemplary embodiment, the eleventh lens may have positive power and a convex-concave meniscus shape that is curved toward the image plane, which can correct its own spherical aberration and reduce the generation of spherical aberration, thereby facilitating the realization of high image quality.

[0096] In an exemplary embodiment, the eleventh lens is in a convex-concave meniscus shape, has different optical powers on-axis and off-axis, corrects the off-axis residual field curvature, and is conducive to achieving high image quality.

[0097] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.3≤Dmax / TTL≤0.6, where Dmax is the maximum clear aperture of the optical lens, and TTL is the total optical length of the optical lens (i.e., the axial distance from the object side of the first lens to the imaging surface of the optical lens). When 0.3≤Dmax / TTL≤0.6 is satisfied, under a certain total optical length, the maximum clear aperture of the optical lens is controlled to be smaller, which is conducive to miniaturization.

[0098] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.6≤TTL / F≤2.3, where TTL is the total optical length of the optical lens, and F is the total focal length of the optical lens. When 1.6≤TTL / F≤2.3 is satisfied, under a certain total focal length, the total optical length is controlled to be smaller, which is conducive to miniaturization.

[0099] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.1≤F / ENPD≤1.4, where F is the total focal length of the optical lens and ENPD is the entrance pupil diameter of the optical lens. When 1.1≤F / ENPD≤1.4 is satisfied, the optical lens has a smaller aperture value by controlling the size of the entrance pupil diameter, which is conducive to achieving a large aperture.

[0100] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.1≤BFL / TTL≤0.3, where BFL is the back focus of the optical lens (i.e., the on-axis distance from the image side of the last lens in the optical lens to the imaging surface of the optical lens), and TTL is the total optical length of the optical lens. Satisfying 0.1≤BFL / TTL≤0.3 is beneficial to the assembly of the optical lens by controlling the length of the optical back focus while achieving miniaturization.

[0101] In an exemplary embodiment, the optical lens according to the present application may satisfy: 2.0≤F1 / F≤4.3, where F1 is the focal length of the first lens and F is the total focal length of the optical lens. Satisfying 2.0≤F1 / F≤4.3, by reasonably allocating the focal length value of the first lens and collecting light, the outgoing light of the first lens is brought closer to the optical axis, reducing the aperture of the rear lens, and facilitating miniaturization.

[0102] In an exemplary embodiment, the optical lens according to the present application may satisfy: -2.7≤F2 / F≤-1.6, where F2 is the focal length of the second lens and F is the total focal length of the optical lens. Satisfying -2.7≤F2 / F≤-1.6, by reasonably allocating the focal length value of the second lens, the second lens generates positive spherical aberration to balance the negative spherical aberration generated by the first lens and the fourth lens, which is conducive to achieving high image quality; in addition, the second lens has a negative optical power, which can smooth the angle of the emitted light and increase the light height of the third lens and the fourth lens, which is conducive to correcting the axial chromatic aberration and achieving high image quality.

[0103] In an exemplary embodiment, the optical lens according to the present application may satisfy: -3.3≤F3 / F≤1.0, where F3 is the focal length of the third lens and F is the total focal length of the optical lens. Satisfying -3.3≤F3 / F≤1.0, by reasonably allocating the focal length value of the third lens and cooperating with the fourth lens to achieve correction of apochromatism and spherical aberration, is conducive to achieving high image quality.

[0104] In an exemplary embodiment, the optical lens according to the present application may satisfy: -2.3≤F4 / F≤1.2, where F4 is the focal length of the fourth lens and F is the total focal length of the optical lens. Satisfying -2.3≤F4 / F≤1.2, by reasonably allocating the focal length value of the fourth lens and cooperating with the third lens to achieve correction of apochromatism and spherical aberration, is conducive to achieving high image quality.

[0105] In an exemplary embodiment, the optical lens according to the present application may satisfy: -1.2≤F5 / F≤-0.6, where F5 is the focal length of the fifth lens and F is the total focal length of the optical lens. Satisfying -1.2≤F5 / F≤-0.6, by reasonably allocating the focal length value of the fifth lens, the fifth lens has a negative focal power in the triplet lens composed of the fifth lens, the sixth lens and the seventh lens, and cooperates with the sixth lens and the seventh lens to achieve correction of apochromatism and spherical aberration, which is conducive to achieving high image quality.

[0106] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.4≤F6 / F≤0.7, where F6 is the focal length of the sixth lens and F is the total focal length of the optical lens. Satisfying 0.4≤F6 / F≤0.7, by reasonably allocating the focal length value of the sixth lens, the sixth lens has positive focal power in the triplet lens consisting of the fifth lens, the sixth lens and the seventh lens, and the sixth lens may be made of a material with large anomalous dispersion, and the system may be apochromatized, which is conducive to achieving infrared confocality.

[0107] In an exemplary embodiment, the optical lens according to the present application may satisfy: -1.0≤F7 / F≤-0.3, where F7 is the focal length of the seventh lens and F is the total focal length of the optical lens. Satisfying -1.0≤F7 / F≤-0.3, by reasonably allocating the focal length value of the seventh lens, the seventh lens has a negative focal power in the triplet lens composed of the fifth lens, the sixth lens and the seventh lens, and cooperates with the fifth lens and the sixth lens to achieve correction of apochromatism and spherical aberration, which is conducive to achieving high image quality.

[0108] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.5≤F8 / F≤1.1, where F8 is the focal length of the eighth lens and F is the total focal length of the optical lens. Satisfying 0.5≤F8 / F≤1.1, by reasonably allocating the focal length value of the eighth lens, selecting a high refractive index material, increasing the positive focal power, and reducing the surface curvature, it is beneficial to reduce the generation of aberrations and achieve high image quality.

[0109] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.2≤F9 / F≤1.1, where F9 is the focal length of the ninth lens and F is the total focal length of the optical lens. Satisfying 0.2≤F9 / F≤1.1, by reasonably allocating the focal length value of the ninth lens, the ninth lens has positive focal power in the doublet lens composed of the ninth lens and the tenth lens, and cooperates with the tenth lens to correct the residual chromatic aberration of the system, which is conducive to achieving high image quality.

[0110] In an exemplary embodiment, the optical lens according to the present application may satisfy: -0.8≤F10 / F≤-0.1, where F10 is the focal length of the tenth lens and F is the total focal length of the optical lens. Satisfying -0.8≤F10 / F≤-0.1, by reasonably allocating the focal length value of the tenth lens, the tenth lens has a negative focal power in the doublet lens composed of the ninth lens and the tenth lens, and cooperates with the ninth lens to correct the off-axis chromatic aberration, which is conducive to achieving high image quality.

[0111] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.8≤F11 / F≤3.7, where F11 is the focal length of the eleventh lens and F is the total focal length of the optical lens. Satisfying 1.8≤F11 / F≤3.7, by reasonably allocating the focal length value of the eleventh lens, the eleventh lens has positive focal power, generates negative spherical aberration, corrects the residual spherical aberration of the system, and is conducive to achieving high image quality.

[0112] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.8≤F34 / F≤1.3, where F34 is the combined focal length of the third lens and the fourth lens, and F is the total focal length of the optical lens. Satisfying 0.8≤F34 / F≤1.3, by reasonably allocating the combined focal length of the third lens and the fourth lens, while correcting the self-chromatic aberration, the absolute value of the optical power is small, the generation of high-order aberrations is reduced, and it is conducive to achieving high image quality.

[0113] In an exemplary embodiment, the optical lens according to the present application may satisfy: -3.5≤F567 / F≤-0.4, where F567 is the combined focal length of the fifth lens, the sixth lens, and the seventh lens, and F is the total focal length of the optical lens. Satisfying -3.5≤F567 / F≤-0.4, by reasonably allocating the combined focal length of the fifth lens, the sixth lens, and the seventh lens, while correcting the self-chromatic aberration, the absolute value of the optical power is small, the generation of high-order aberrations is reduced, and it is conducive to achieving high image quality.

[0114] In an exemplary embodiment, the optical lens according to the present application may satisfy: -1.9≤F34 / F567≤-0.1, wherein F34 is the combined focal length of the third lens and the fourth lens, and F567 is the combined focal length of the fifth lens, the sixth lens, and the seventh lens. -1.9≤F34 / F567≤-0.1 is satisfied, and by reasonably allocating the combined focal length of the third lens and the fourth lens and the combined focal length of the fifth lens, the sixth lens, and the seventh lens, F34 is positive and F567 is negative, and the spherical aberrations generated by the two complement each other, which is conducive to achieving high image quality.

[0115] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.7≤FI / F≤9.3, where FI is the combined focal length of the first lens to the seventh lens, and F is the total focal length of the optical lens. Satisfying 1.7≤FI / F≤9.3, by reasonably allocating the combined focal length of the first lens to the seventh lens, sharing the focal power of the front lens group, balancing the system aberration, is conducive to achieving high image quality.

[0116] In an exemplary embodiment, the optical lens according to the present application includes ten lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens, and the optical lens can satisfy: 0.4≤FⅡ / F≤2.0, wherein FⅡ is the combined focal length of the eighth lens to the tenth lens, and F is the total focal length of the optical lens. Satisfying 0.4≤FⅡ / F≤2.0, by reasonably allocating the combined focal length of the eighth lens to the tenth lens, sharing the optical power of the rear lens group, balancing the system aberration, is conducive to achieving high image quality.

[0117] In an exemplary embodiment, the optical lens includes eleven lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens and an eleventh lens, and the optical lens can satisfy: 0.4≤FⅡ' / F≤2.0, wherein FⅡ' is the combined focal length of the eighth lens to the eleventh lens, and F is the total focal length of the optical lens. Satisfying 0.4≤FⅡ' / F≤2.0, by reasonably allocating the combined focal length of the eighth lens to the eleventh lens, sharing the optical power of the rear lens group, balancing the system aberration, is conducive to achieving high image quality.

[0118] In an exemplary embodiment, the optical lens according to the present application may satisfy: 90≤VD6≤100, where VD6 is the Abbe number of the sixth lens. When 90≤VD6≤100 is satisfied, the Abbe number of the sixth lens is reasonably set to reduce the generation of dispersion, reduce the difficulty of chromatic aberration correction of the system, and facilitate the realization of infrared confocal.

[0119] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.7≤ND9≤2.2, where ND9 is the refractive index of the ninth lens. Satisfying 1.7≤ND9≤2.2, by reasonably setting the refractive index of the ninth lens, increasing the positive focal power of the ninth lens, reducing the surface curvature, and reducing the generation of aberrations, is conducive to achieving high image quality.

[0120] In an exemplary embodiment, the aperture number Fno of the optical lens of the present application can reach 1.2.

[0121] In an exemplary embodiment, the total focal length F of the optical lens of the present application can reach 50 mm.

[0122] The optical lens provided in the present application helps to reduce the defocusing amount of the infrared spectrum relative to the visible spectrum by reasonably controlling the refractive index and Abbe number of each lens, thereby realizing the infrared confocal function of the lens.

[0123] In an exemplary embodiment, as needed, the optical lens of the present application may further include a filter and / or protective glass disposed between the last lens and the imaging surface to filter light with different wavelengths and prevent damage to the image-side element (e.g., chip) of the optical lens.

[0124] In an exemplary embodiment, each lens of the optical lens may be a spherical lens or an aspherical lens. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on imaging quality, the number of aspherical lenses can be increased, or even all lenses use aspherical lenses. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality of the lens. Optionally, the object side and image side of each lens in the optical lens are spherical mirror surfaces.

[0125] The optical lens according to the above-mentioned embodiment of the present application achieves at least one beneficial effect of long focal length, large aperture, infrared confocality and high image quality through reasonable setting of each lens shape, optical focal length and related parameters.

[0126] However, it should be understood by those skilled in the art that, without departing from the technical solution 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 ten or eleven lenses are described as examples in the embodiments, the optical lens is not limited to ten or eleven lenses. If necessary, the optical lens may also include other numbers of lenses. The following further describes specific embodiments of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0127] Example 1

[0128] The following reference Figure 1 An optical lens according to Embodiment 1 of the present application is described. Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present application is shown.

[0129] like Figure 1 As shown, the optical lens includes, from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10 and an eleventh lens L11.

[0130] The first lens L1 has positive refractive power, an object-side surface S1 of which is convex, and an image-side surface S2 of which is concave.

[0131] The second lens L2 has negative refractive power, and its object-side surface S4 is concave, and its image-side surface S5 is convex.

[0132] The third lens L3 has negative refractive power, and its object-side surface S6 is convex, and its image-side surface S7 is concave.

[0133] The fourth lens L4 has positive refractive power, and its object-side surface S7 is convex, and its image-side surface S8 is convex.

[0134] The fifth lens L5 has negative refractive power, and its object-side surface S9 is convex, and its image-side surface S10 is concave.

[0135] The sixth lens L6 has positive refractive power, and its object-side surface S10 is convex, and its image-side surface S11 is convex.

[0136] The seventh lens L7 has negative refractive power, and its object-side surface S11 is concave, and its image-side surface S12 is concave.

[0137] The eighth lens L8 has positive refractive power, and its object-side surface S13 is convex, and its image-side surface S14 is convex.

[0138] The ninth lens L9 has positive refractive power, and its object-side surface S15 is convex, and its image-side surface S16 is convex.

[0139] The tenth lens L10 has negative refractive power, and its object-side surface S16 is a concave surface, and its image-side surface S17 is a concave surface.

[0140] The eleventh lens L11 has positive refractive power, and its object-side surface S18 is convex, and its image-side surface S19 is concave.

[0141] The third lens L3 and the fourth lens L4 form a doublet lens, the fifth lens L5, the sixth lens L6 and the seventh lens L7 form a triplet lens, and the ninth lens L9 and the tenth lens L10 form a doublet lens.

[0142] The optical lens further includes a stop STO disposed between the first lens L1 and the second lens L2.

[0143] Optionally, the optical lens may further include a filter CG having an object side surface S20 and an image side surface S21 and / or a protective glass (not shown) having an object side surface and an image side surface. The filter CG and / or the protective glass may be used to correct color deviation, and the filter CG and / or the protective glass may also be used to protect an image sensor chip located at the imaging surface IMA. Light from the object sequentially passes through each surface S1 to S21 and is finally imaged on the imaging surface IMA.

[0144] Table 1 shows the radius of curvature, thickness / distance, refractive index and Abbe number of each lens of the optical lens of Example 1, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0145]

[0146]

[0147] Table 1

[0148] Example 2

[0149] The following reference Figure 2 The optical lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 2 A schematic structural diagram of an optical lens according to Embodiment 2 of the present application is shown.

[0150] like Figure 2 As shown, the optical lens includes, from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10 and an eleventh lens L11.

[0151] The first lens L1 has positive refractive power, an object-side surface S1 of which is convex, and an image-side surface S2 of which is concave.

[0152] The second lens L2 has negative refractive power, and its object-side surface S4 is concave, and its image-side surface S5 is convex.

[0153] The third lens L3 has negative refractive power, and its object-side surface S6 is convex, and its image-side surface S7 is concave.

[0154] The fourth lens L4 has positive refractive power, and its object-side surface S7 is convex, and its image-side surface S8 is convex.

[0155] The fifth lens L5 has negative refractive power, and its object-side surface S9 is convex, and its image-side surface S10 is concave.

[0156] The sixth lens L6 has positive refractive power, and its object-side surface S10 is convex, and its image-side surface S11 is convex.

[0157] The seventh lens L7 has negative refractive power, and its object-side surface S11 is concave, and its image-side surface S12 is concave.

[0158] The eighth lens L8 has positive refractive power, and its object-side surface S13 is convex, and its image-side surface S14 is convex.

[0159] The ninth lens L9 has positive refractive power, and its object-side surface S15 is convex, and its image-side surface S16 is convex.

[0160] The tenth lens L10 has negative refractive power, and its object-side surface S16 is a concave surface, and its image-side surface S17 is a concave surface.

[0161] The eleventh lens L11 has positive refractive power, and its object-side surface S18 is convex, and its image-side surface S19 is concave.

[0162] The third lens L3 and the fourth lens L4 form a doublet lens, the fifth lens L5, the sixth lens L6 and the seventh lens L7 form a triplet lens, and the ninth lens L9 and the tenth lens L10 form a doublet lens.

[0163] The optical lens further includes a stop STO disposed between the first lens L1 and the second lens L2.

[0164] Optionally, the optical lens may further include a filter CG having an object side surface S20 and an image side surface S21 and / or a protective glass (not shown) having an object side surface and an image side surface. The filter CG and / or the protective glass may be used to correct color deviation, and the filter CG and / or the protective glass may also be used to protect an image sensor chip located at the imaging surface IMA. Light from the object sequentially passes through each surface S1 to S21 and is finally imaged on the imaging surface IMA.

[0165] Table 2 shows the radius of curvature, thickness / distance, refractive index and Abbe number of each lens of the optical lens of Example 2, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0166]

[0167] Table 2

[0168] Example 3

[0169] The following reference Figure 3 An optical lens according to Example 3 of the present application is described. Figure 3 A schematic structural diagram of an optical lens according to Example 3 of the present application is shown.

[0170] like Figure 3 As shown, the optical lens includes, from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10 and an eleventh lens L11.

[0171] The first lens L1 has positive refractive power, an object-side surface S1 of which is convex, and an image-side surface S2 of which is concave.

[0172] The second lens L2 has negative refractive power, and its object-side surface S4 is concave, and its image-side surface S5 is convex.

[0173] The third lens L3 has negative refractive power, and its object-side surface S6 is convex, and its image-side surface S7 is concave.

[0174] The fourth lens L4 has positive refractive power, and its object-side surface S7 is convex, and its image-side surface S8 is convex.

[0175] The fifth lens L5 has negative refractive power, and its object-side surface S9 is convex, and its image-side surface S10 is concave.

[0176] The sixth lens L6 has positive refractive power, and its object-side surface S10 is convex, and its image-side surface S11 is convex.

[0177] The seventh lens L7 has negative refractive power, and its object-side surface S11 is concave, and its image-side surface S12 is concave.

[0178] The eighth lens L8 has positive refractive power, and its object-side surface S13 is convex, and its image-side surface S14 is convex.

[0179] The ninth lens L9 has positive refractive power, and its object-side surface S15 is convex, and its image-side surface S16 is convex.

[0180] The tenth lens L10 has negative refractive power, and its object-side surface S16 is a concave surface, and its image-side surface S17 is a concave surface.

[0181] The eleventh lens L11 has positive refractive power, and its object-side surface S18 is convex, and its image-side surface S19 is concave.

[0182] The third lens L3 and the fourth lens L4 form a doublet lens, the fifth lens L5, the sixth lens L6 and the seventh lens L7 form a triplet lens, and the ninth lens L9 and the tenth lens L10 form a doublet lens.

[0183] The optical lens further includes a stop STO disposed between the first lens L1 and the second lens L2.

[0184] Optionally, the optical lens may further include a filter CG having an object side surface S20 and an image side surface S21 and / or a protective glass (not shown) having an object side surface and an image side surface. The filter CG and / or the protective glass may be used to correct color deviation, and the filter CG and / or the protective glass may also be used to protect an image sensor chip located at the imaging surface IMA. Light from the object sequentially passes through each surface S1 to S21 and is finally imaged on the imaging surface IMA.

[0185] Table 3 shows the radius of curvature, thickness / distance, refractive index and Abbe number of each lens of the optical lens of Example 3, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0186]

[0187]

[0188] Table 3

[0189] Example 4

[0190] The following reference Figure 4 An optical lens according to Example 4 of the present application is described. Figure 4 A schematic structural diagram of an optical lens according to Example 4 of the present application is shown.

[0191] like Figure 4 As shown, the optical lens includes, from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9 and a tenth lens L10.

[0192] The first lens L1 has positive refractive power, an object-side surface S1 of which is convex, and an image-side surface S2 of which is concave.

[0193] The second lens L2 has negative refractive power, and its object-side surface S4 is concave, and its image-side surface S5 is convex.

[0194] The third lens L3 has positive refractive power, and its object-side surface S6 is convex, and its image-side surface S7 is convex.

[0195] The fourth lens L4 has negative refractive power, and its object-side surface S7 is concave, and its image-side surface S8 is convex.

[0196] The fifth lens L5 has negative refractive power, and its object-side surface S9 is convex, and its image-side surface S10 is concave.

[0197] The sixth lens L6 has positive refractive power, and its object-side surface S10 is convex, and its image-side surface S11 is convex.

[0198] The seventh lens L7 has negative refractive power, and its object-side surface S11 is concave, and its image-side surface S12 is concave.

[0199] The eighth lens L8 has positive refractive power, and its object-side surface S13 is convex, and its image-side surface S14 is convex.

[0200] The ninth lens L9 has positive refractive power, and its object-side surface S15 is convex, and its image-side surface S16 is concave.

[0201] The tenth lens L10 has negative refractive power, and its object-side surface S16 is convex, and its image-side surface S17 is concave.

[0202] The third lens L3 and the fourth lens L4 form a doublet lens, the fifth lens L5, the sixth lens L6 and the seventh lens L7 form a triplet lens, and the ninth lens L9 and the tenth lens L10 form a doublet lens.

[0203] The optical lens further includes a stop STO disposed between the first lens L1 and the second lens L2.

[0204] Optionally, the optical lens may further include a filter CG having an object side surface S18 and an image side surface S19 and / or a protective glass (not shown) having an object side surface and an image side surface. The filter CG and / or the protective glass may be used to correct color deviation, and the filter CG and / or the protective glass may also be used to protect an image sensor chip located at the imaging surface IMA. Light from the object sequentially passes through each surface S1 to S19 and is finally imaged on the imaging surface IMA.

[0205] Table 4 shows the radius of curvature, thickness / distance, refractive index and Abbe number of each lens of the optical lens of Example 4, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0206]

[0207]

[0208] Table 4

[0209] Example 5

[0210] The following reference Figure 5 An optical lens according to Example 5 of the present application is described. Figure 5 A schematic structural diagram of an optical lens according to Example 5 of the present application is shown.

[0211] like Figure 5 As shown, the optical lens includes, from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9 and a tenth lens L10.

[0212] The first lens L1 has positive refractive power, an object-side surface S1 of which is convex, and an image-side surface S2 of which is concave.

[0213] The second lens L2 has negative refractive power, and its object-side surface S4 is concave, and its image-side surface S5 is convex.

[0214] The third lens L3 has positive refractive power, and its object-side surface S6 is convex, and its image-side surface S7 is convex.

[0215] The fourth lens L4 has negative refractive power, and its object-side surface S7 is concave, and its image-side surface S8 is convex.

[0216] The fifth lens L5 has negative refractive power, and its object-side surface S9 is convex, and its image-side surface S10 is concave.

[0217] The sixth lens L6 has positive refractive power, and its object-side surface S10 is convex, and its image-side surface S11 is convex.

[0218] The seventh lens L7 has negative refractive power, and its object-side surface S11 is concave, and its image-side surface S12 is convex.

[0219] The eighth lens L8 has positive refractive power, and its object-side surface S13 is convex, and its image-side surface S14 is convex.

[0220] The ninth lens L9 has positive refractive power, and its object-side surface S15 is convex, and its image-side surface S16 is concave.

[0221] The tenth lens L10 has negative refractive power, and its object-side surface S16 is convex, and its image-side surface S17 is concave.

[0222] The third lens L3 and the fourth lens L4 form a doublet lens, the fifth lens L5, the sixth lens L6 and the seventh lens L7 form a triplet lens, and the ninth lens L9 and the tenth lens L10 form a doublet lens.

[0223] The optical lens further includes a stop STO disposed between the first lens L1 and the second lens L2.

[0224] Optionally, the optical lens may further include a filter CG having an object side surface S18 and an image side surface S19 and / or a protective glass (not shown) having an object side surface and an image side surface. The filter CG and / or the protective glass may be used to correct color deviation, and the filter CG and / or the protective glass may also be used to protect an image sensor chip located at the imaging surface IMA. Light from the object sequentially passes through each surface S1 to S19 and is finally imaged on the imaging surface IMA.

[0225] Table 5 shows the radius of curvature, thickness / distance, refractive index and Abbe number of each lens of the optical lens of Example 5, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0226]

[0227] Table 5

[0228] In summary, Examples 1 to 5 respectively satisfy the relationship shown in Table 6 below.

[0229]

[0230]

[0231] Table 6

[0232] The present application also provides an electronic device, which may include an optical lens according to the above-mentioned embodiment of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be an independent electronic device such as a detection distance camera, or an imaging module integrated in a device such as a detection distance device. In addition, the electronic device may also be an independent imaging device such as a vehicle-mounted camera, or an imaging module integrated in a driving assistance system such as a vehicle-mounted camera.

[0233] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a 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 above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

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

2. The optical lens according to claim 1, 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 sixth lens is convex, and the image side surface is convex; The object side surface of the seventh lens is a concave surface; 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 a convex surface; and The image side surface of the tenth lens is a concave surface.

3. The optical lens according to claim 1, characterized in that: The optical lens satisfies any one of the following conditions: 0.3≤Dmax / TTL≤0.6, 1.6≤TTL / F≤2.3, 1.1≤F / ENPD≤1.4, 0.1≤BFL / TTL≤0.3, Wherein, Dmax is the maximum full aperture of the optical lens, TTL is the total optical length of the optical lens, F is the total focal length of the optical lens, ENPD is the entrance pupil diameter of the optical lens, and BFL is the back focus of the optical lens.

4. The optical lens according to any one of claims 1 to 3, characterized in that: The optical lens satisfies any one of the following conditions: 2.0≤F1 / F≤4.3,-2.7≤F2 / F≤-1.6,-3.3≤F3 / F≤1.0,-2.3≤F4 / F≤1.2,-1.2≤F5 / F≤-0.6,0.4≤F6 / F≤0.7,-1.0≤F7 / F≤-0.3,0.5≤F8 / F≤1.1,0.2≤F9 / F≤1.1,-0.8≤F10 / F≤-0.1, Among them, F1 is the focal length of the first lens, F is the total focal length of the optical lens, F2 is the focal length of the second lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, F5 is the focal length of the fifth lens, F6 is the focal length of the sixth lens, F7 is the focal length of the seventh lens, F8 is the focal length of the eighth lens, F9 is the focal length of the ninth lens, and F10 is the focal length of the tenth lens.

5. The optical lens according to any one of claims 1 to 3, characterized in that: The optical lens satisfies any one of the following conditions: 0.8≤F34 / F≤1.3, -3.5≤F567 / F≤-0.4, -1.9≤F34 / F567≤-0.1, 1.7≤FⅠ / F≤9.3, 0.4≤FⅡ / F≤2.0, Among them, F34 is the combined focal length of the third lens and the fourth lens, F is the total focal length of the optical lens, F567 is the combined focal length of the fifth lens, the sixth lens and the seventh lens, FⅠ is the combined focal length of the first lens to the seventh lens, and FⅡ is the combined focal length of the eighth lens to the tenth lens.

6. The optical lens according to any one of claims 1 to 3, characterized in that: The optical lens satisfies any one of the following conditions: 90≤VD6≤100,1.7≤ND9≤2.2, Wherein, VD6 is the Abbe number of the sixth lens, and ND9 is the refractive index of the ninth lens.

7. The optical lens according to any one of claims 1 to 3, characterized in that: The optical lens further includes an eleventh lens located between the tenth lens and the imaging surface of the optical lens, wherein the eleventh lens has positive optical power.

8. The optical lens according to claim 7, characterized in that: The object side surface of the eleventh lens is convex, and the image side surface is concave.

9. The optical lens according to claim 7, characterized in that: The focal length F11 of the eleventh lens and the total focal length F of the optical lens satisfy the following: 1.8≤F11 / F≤3.

7.

10. The optical lens according to claim 7, characterized in that: The combined focal length FII' of the eighth lens to the eleventh lens and the total focal length F of the optical lens satisfy the following: 0.4≤FII' / F≤2.0.

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