Optical lens

Abstract

The utility model discloses an optical lens. The utility model relates to a zoom lens, which sequentially comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with negative focal power, a sixth lens with positive focal power and a seventh lens with negative focal power from an object side to an image side along an optical axis, the first lens has positive focal power, the eighth lens has positive focal power, the ninth lens has positive focal power, the tenth lens has negative focal power, and the eleventh lens has positive focal power.

Description

Technical Field

[0001] The present application relates to the field of optical devices, and in particular to an eleven-element optical lens. Background Art

[0002] In recent years, with the continuous advancement of science and technology, optical lenses have been widely used in the security field, and higher requirements have been placed on optical lenses used in the security field. For example, optical lenses must have high imaging quality.

[0003] However, while meeting high imaging quality requirements, the aperture of existing optical lenses is often small, which affects the shooting effect of the optical lenses in dark environments at night or on rainy days, thereby limiting the application of optical lenses in the security field. Utility Model Content

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

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

[0006] According to an exemplary embodiment of the present application, the object-side surface of the first lens is convex, and the image-side surface is concave.

[0007] According to an exemplary embodiment of the present application, the object-side surface of the second lens is convex, and the image-side surface is concave.

[0008] According to an exemplary embodiment of the present application, the object-side surface of the third lens is convex, and the image-side surface is convex.

[0009] According to an exemplary embodiment of the present application, the object-side surface of the fourth lens is concave, and the image-side surface is concave.

[0010] According to an exemplary embodiment of the present application, the object-side surface of the fifth lens is concave, and the image-side surface is concave.

[0011] According to an exemplary embodiment of the present application, the object-side surface of the sixth lens is a convex surface, and the image-side surface is a convex surface.

[0012] According to an exemplary embodiment of the present application, the object-side surface of the seventh lens is convex, and the image-side surface is concave.

[0013] According to an exemplary embodiment of the present application, the object-side surface of the eighth lens is a convex surface.

[0014] According to an exemplary embodiment of the present application, the object-side surface of the ninth lens is a convex surface, and the image-side surface is a convex surface.

[0015] According to an exemplary embodiment of the present application, the object-side surface of the tenth lens is a concave surface, and the image-side surface is a concave surface.

[0016] According to an exemplary embodiment of the present application, the object-side surface of the eleventh lens is convex, and the image-side surface is concave.

[0017] According to an exemplary embodiment of the present application, the effective focal length F1 of the first lens and the entire focal length F of the optical lens group satisfy: 1.7≤F1 / F≤3.0.

[0018] According to an exemplary embodiment of the present application, the effective focal length F2 of the second lens and the entire focal length F of the optical lens group satisfy: -2.8≤F2 / F≤-2.0.

[0019] According to an exemplary embodiment of the present application, the refractive index Nd1 of the first lens and the refractive index Nd2 of the second lens satisfy: 0.3≤|Nd1-Nd2|≤0.6; and the chromatic aberration coefficient Vd1 of the first lens and the chromatic aberration coefficient Vd2 of the second lens satisfy: 65≤|Vd1-Vd2|≤75.

[0020] According to an exemplary embodiment of the present application, the effective focal length F3 of the third lens and the entire focal length F of the optical lens group satisfy: 0.4≤F3 / F≤0.8.

[0021] According to an exemplary embodiment of the present application, the effective focal length F4 of the fourth lens and the entire focal length F of the optical lens group satisfy: -0.6≤F4 / F≤-0.3.

[0022] According to an exemplary embodiment of the present application, the combined focal length F34 of the third lens and the fourth lens and the entire group focal length F of the optical lens satisfy: -6.1≤F34 / F≤-3.6.

[0023] According to an exemplary embodiment of the present application, the effective focal length F5 of the fifth lens and the entire focal length F of the optical lens group satisfy: -1.1≤F5 / F≤-0.7.

[0024] According to an exemplary embodiment of the present application, the effective focal length F6 of the sixth lens and the entire focal length F of the optical lens group satisfy: 0.6≤F6 / F≤1.0.

[0025] According to an exemplary embodiment of the present application, the combined focal length F56 of the fifth lens and the sixth lens and the entire group focal length F of the optical lens satisfy: 1.7≤F56 / F≤4.5.

[0026] According to an exemplary embodiment of the present application, the refractive index Nd5 of the fifth lens and the refractive index Nd6 of the sixth lens satisfy: 0.1≤|Nd5-Nd6|≤0.3; and the dispersion coefficient Vd5 of the fifth lens and the dispersion coefficient Vd6 of the sixth lens satisfy: 4.1≤|Vd5-Vd6|≤5.9.

[0027] According to an exemplary embodiment of the present application, the effective focal length F7 of the seventh lens and the entire focal length F of the optical lens group satisfy: -1.2≤F7 / F≤-0.5.

[0028] According to an exemplary embodiment of the present application, the effective focal length F8 of the eighth lens and the entire focal length F of the optical lens group satisfy: 0.3≤F8 / F≤0.7.

[0029] According to an exemplary embodiment of the present application, the combined focal length F78 of the seventh lens and the eighth lens and the entire group focal length F of the optical lens satisfy: 0.9≤F78 / F≤2.3.

[0030] According to an exemplary embodiment of the present application, the refractive index Nd7 of the seventh lens and the refractive index Nd8 of the eighth lens satisfy: 0≤|Nd7-Nd8|≤0.2; and the dispersion coefficient Vd7 of the seventh lens and the dispersion coefficient Vd8 of the eighth lens satisfy: 5.5≤|Vd7-Vd8|≤6.0.

[0031] According to an exemplary embodiment of the present application, the effective focal length F9 of the ninth lens and the entire focal length F of the optical lens group satisfy: 0.3≤F9 / F≤0.8.

[0032] According to an exemplary embodiment of the present application, the effective focal length F10 of the tenth lens and the entire focal length F of the optical lens group satisfy: -0.5≤F10 / F≤-0.2.

[0033] According to an exemplary embodiment of the present application, the combined focal length F910 of the ninth lens and the tenth lens and the entire group focal length F of the optical lens satisfy: -4.1≤F910 / F≤-1.1.

[0034] According to an exemplary embodiment of the present application, the effective focal length F11 of the eleventh lens and the entire focal length F of the optical lens group satisfy: 1.5≤F11 / F≤1.9.

[0035] According to an exemplary embodiment of the present application, a center thickness CT5 of the fifth lens on the optical axis and a center thickness CT6 of the sixth lens on the optical axis satisfy: 0.1≤CT5 / CT6≤0.3.

[0036] According to an exemplary embodiment of the present application, a center thickness CT7 of the seventh lens on the optical axis and a center thickness CT8 of the eighth lens on the optical axis satisfy: 0.1≤CT7 / CT8≤0.3.

[0037] According to an exemplary embodiment of the present application, the maximum light-clearing full aperture D1 of the first lens and the total optical length TTL of the optical lens satisfy: 0.1≤D1 / TTL≤0.5.

[0038] According to an exemplary embodiment of the present application, the entire group focal length F of the optical lens and the total optical length TTL of the optical lens satisfy: 2.4≤TTL / F≤2.9.

[0039] According to an exemplary embodiment of the present application, the back focal length BFL of the optical lens and the total optical length TTL of the optical lens satisfy: 0≤BFL / TTL≤0.3.

[0040] The present application adopts eleven lenses, and by reasonably allocating the optical focal length and surface shape of each lens, the optical lens can achieve at least one of the beneficial effects of miniaturization, large aperture, large target surface, high resolution, and low distortion. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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 the drawings:

[0042] Figure 1 A schematic structural diagram of an optical lens according to Embodiment 1 of the present application is shown;

[0043] Figure 2 A schematic structural diagram of an optical lens according to Embodiment 2 of the present application is shown;

[0044] Figure 3 A schematic structural diagram of an optical lens according to Embodiment 3 of the present application is shown; and

[0045] Figure 4 A schematic structural diagram of an optical lens according to Example 4 of the present application is shown. DETAILED DESCRIPTION

[0046] In order to better understand the present application, various aspects of the present application are described in detail with reference to the accompanying 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.

[0047] In the 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 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 for illustration only and are not drawn strictly to scale.

[0048] 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 object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0049] It should also be understood that the terms "include", "comprising", "having", "including" 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. It should be noted that in this specification, the expressions first, second, third, etc. are only used to distinguish one feature from another, and do not represent any limitation on the features.

[0050] Unless otherwise defined, all terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. Terms should be interpreted as having the same meaning as they have 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.

[0051] 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.

[0052] The optical lens according to an exemplary embodiment of the present application may include 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 eleven lenses are arranged in sequence from the object side to the image side along the optical axis.

[0053] In an exemplary embodiment, the first lens may have a positive optical power. The first lens is designed as a positive lens, which is conducive to collecting object-side light into the system, and can also deflect the light entering the system, reducing the incident angle of the light entering the rear lens, thereby compensating for the aberration caused by the edge field of view. In one example, the object side surface of the first lens may be convex, and the image side surface may be concave.

[0054] In an exemplary embodiment, the second lens may have a negative optical power. The second lens is designed as a negative lens, which is beneficial to balance the positive optical power of the first lens, and deflect the light emitted from the second lens so that the light enters the rear lens more smoothly, which is beneficial to the propagation of the light in the rear lens. In one example, the object side surface of the second lens may be a convex surface, and the image side surface may be a concave surface.

[0055] In an exemplary embodiment, the first lens and the second lens may be cemented to form a cemented lens. The first lens having positive power and the second lens having negative power are cemented to each other, which can well correct chromatic aberration and effectively reduce tolerance sensitivity.

[0056] In an exemplary embodiment, the third lens may have positive power. The third lens is designed as a positive lens, which is conducive to the convergence of light and allows the light to enter the rear system better, which is convenient for optimizing aberrations. In one example, the object side surface of the third lens may be convex, and the image side surface may be convex.

[0057] In an exemplary embodiment, the fourth lens may have a negative optical power. The fourth lens is designed as a negative lens, which is conducive to diverging the light emitted from the third lens and correcting the chromatic aberration generated by the third lens. In one example, the object side surface of the fourth lens may be a concave surface, and the image side surface may be a concave surface.

[0058] In an exemplary embodiment, the third lens and the fourth lens may be cemented to form a cemented lens. The third lens with positive power and the fourth lens with negative power are cemented to each other, which is not only beneficial to the optimization of aberrations, but also beneficial to the correction of chromatic aberrations.

[0059] In an exemplary embodiment, the fifth lens may have a negative optical power. The fifth lens is designed as a negative lens, which is conducive to increasing the aperture of the optical lens and realizing a large aperture of the optical lens, while also being able to correct aberrations such as field curvature and spherical aberration generated by the first lens, the second lens, the third lens, and the fourth lens. In one example, the object side surface of the fifth lens may be a concave surface, and the image side surface may be a concave surface.

[0060] In an exemplary embodiment, the sixth lens may have positive power. The sixth lens is designed as a positive lens, which is conducive to correcting the field curvature generated by the fifth lens, and can also correct the distortion generated by the third lens and the fourth lens. In one example, the object side surface of the sixth lens may be convex, and the image side surface may be convex.

[0061] In an exemplary embodiment, the fifth lens and the sixth lens may be cemented to form a cemented lens. The fifth lens with negative power and the sixth lens with positive power are cemented to each other, which is not only beneficial to the correction of chromatic aberration, but also beneficial to reducing tolerance sensitivity.

[0062] In an exemplary embodiment, the seventh lens may have a negative optical power. The seventh lens is designed as a negative lens, which is conducive to collecting the light emitted from the sixth lens in the system. In one example, the object side surface of the seventh lens may be convex, and the image side surface may be concave.

[0063] In an exemplary embodiment, the eighth lens may have positive optical power. The eighth lens is designed as a positive lens, which is conducive to the convergence of light and can also correct aberrations such as spherical aberration. In one example, the object side surface of the eighth lens may be a convex surface.

[0064] In an exemplary embodiment, the seventh lens and the eighth lens may be cemented to form a cemented lens. The seventh lens with negative power and the eighth lens with positive power are cemented to each other, which is not only beneficial to the optimization of aberrations, but also beneficial to reducing tolerance sensitivity.

[0065] In an exemplary embodiment, the ninth lens may have positive optical power. The ninth lens is designed as a positive lens, which is conducive to re-converging the light emitted from the eighth lens, thereby correcting the additional spherical aberration, coma and other aberrations of the optical lens. In one example, the object side surface of the ninth lens may be convex, and the image side surface may be convex.

[0066] In an exemplary embodiment, the tenth lens may have a negative optical power. The tenth lens is designed as a negative lens, which is conducive to diverging the light emitted from the ninth lens, so that the chief ray angle (CRA) of the optical lens is within a reasonable range, thereby achieving large target surface imaging of the optical lens. In one example, the object side surface of the tenth lens may be a concave surface, and the image side surface may be a concave surface.

[0067] In an exemplary embodiment, the ninth lens and the tenth lens may be cemented to form a cemented lens. The ninth lens having positive refractive power and the tenth lens having negative refractive power are cemented to correct additional aberrations of the optical lens.

[0068] In an exemplary embodiment, the eleventh lens may have positive power. The eleventh lens is designed as a positive lens, which can compensate for the excessive negative power of the front lens and is also conducive to correcting distortion, thereby meeting the imaging requirements of low distortion. In one example, the object side surface of the eleventh lens may be convex and the image side surface may be concave.

[0069] In exemplary embodiments, any one of the first to eleventh lenses may be a spherical lens.

[0070] In an exemplary embodiment, the optical lens may further include a stop disposed between the second lens and the third lens.

[0071] In an exemplary embodiment, the effective focal length F1 of the first lens and the focal length F of the entire optical lens group can satisfy: 1.7≤F1 / F≤3.0. Reasonable configuration of the effective focal length of the first lens can effectively collect the object light into the system while ensuring the processability of the first lens, and realize the deflection of the light, which is conducive to reducing the aberration of the edge field of view.

[0072] In an exemplary embodiment, the effective focal length F2 of the second lens and the focal length F of the entire optical lens group can satisfy: -2.8≤F2 / F≤-2.0. Reasonable configuration of the effective focal length of the second lens can make the second lens have an appropriate negative focal power, which is beneficial to compensate for the excessive positive focal power of the first lens, and is beneficial to the propagation of light, reducing the difficulty of chromatic aberration correction.

[0073] In an exemplary embodiment, the refractive index Nd1 of the first lens and the refractive index Nd2 of the second lens may satisfy: 0.3≤|Nd1-Nd2|≤0.6; and the dispersion coefficient Vd1 of the first lens and the dispersion coefficient Vd2 of the second lens may satisfy: 65≤|Vd1-Vd2|≤75. Reasonable configuration of the materials of the first lens and the second lens, and optimization of the dispersion coefficients of the first lens and the second lens can effectively correct the chromatic aberration of the optical lens, thereby improving the resolution of the optical lens.

[0074] In an exemplary embodiment, the effective focal length F3 of the third lens and the focal length F of the entire optical lens group can satisfy: 0.4≤F3 / F≤0.8. Reasonable configuration of the effective focal length of the third lens is conducive to the convergence of light. At the same time, since the third lens is arranged behind the aperture, it is more conducive to the optimization of aberrations.

[0075] In an exemplary embodiment, the effective focal length F4 of the fourth lens and the focal length F of the entire optical lens group can satisfy: -0.6≤F4 / F≤-0.3. Reasonable configuration of the effective focal length of the fourth lens can make the fourth lens have an appropriate negative focal power, which is conducive to correcting the chromatic aberration generated by the third lens.

[0076] In an exemplary embodiment, the combined focal length F34 of the third lens and the fourth lens and the entire group focal length F of the optical lens can satisfy: -6.1≤F34 / F≤-3.6. Reasonable configuration of the combined focal length of the third lens and the fourth lens is conducive to correcting the chromatic aberration generated by the third lens, and can also compensate for the additional aberration generated by the front lens.

[0077] In an exemplary embodiment, the effective focal length F5 of the fifth lens and the focal length F of the entire optical lens group can satisfy: -1.1≤F5 / F≤-0.7. Reasonable configuration of the effective focal length of the fifth lens is conducive to expanding the width of the light beam and realizing a large aperture of the optical lens, while also being able to correct aberrations such as field curvature and spherical aberration generated by the first lens, the second lens, the third lens, and the fourth lens.

[0078] In an exemplary embodiment, the effective focal length F6 of the sixth lens and the focal length F of the entire optical lens group can satisfy: 0.6≤F6 / F≤1.0. Reasonable configuration of the effective focal length of the sixth lens can make the sixth lens have an appropriate positive focal power, which is conducive to correcting aberrations such as spherical aberration and chromatic aberration generated by the fifth lens.

[0079] In an exemplary embodiment, the combined focal length F56 of the fifth lens and the sixth lens and the entire group focal length F of the optical lens can satisfy: 1.7≤F56 / F≤4.5. Reasonable configuration of the combined focal length of the fifth lens and the sixth lens can effectively correct the chromatic aberration of the optical lens and reduce the tolerance sensitivity of the optical lens.

[0080] In an exemplary embodiment, the refractive index Nd5 of the fifth lens and the refractive index Nd6 of the sixth lens may satisfy: 0.1≤|Nd5-Nd6|≤0.3; and the dispersion coefficient Vd5 of the fifth lens and the dispersion coefficient Vd6 of the sixth lens may satisfy: 4.1≤|Vd5-Vd6|≤5.9. Reasonable configuration of the materials of the fifth lens and the sixth lens and optimization of the dispersion coefficients of the fifth lens and the sixth lens can effectively correct the chromatic aberration of the optical lens and reduce the tolerance sensitivity of the optical lens.

[0081] In an exemplary embodiment, the effective focal length F7 of the seventh lens and the focal length F of the entire optical lens group can satisfy: -1.2≤F7 / F≤-0.5. Reasonable configuration of the effective focal length of the seventh lens is conducive to light tracing and can better collect the light emitted from the sixth lens in the rear system.

[0082] In an exemplary embodiment, the effective focal length F8 of the eighth lens and the focal length F of the entire optical lens group can satisfy: 0.3≤F8 / F≤0.7. Reasonable configuration of the effective focal length of the eighth lens is conducive to the convergence of light, and can also well compensate for the axial chromatic aberration generated by the seventh lens and the additional aberration generated by the front lens.

[0083] In an exemplary embodiment, the combined focal length F78 of the seventh lens and the eighth lens and the entire group focal length F of the optical lens can satisfy: 0.9≤F78 / F≤2.3. Reasonable configuration of the combined focal length of the seventh lens and the eighth lens can effectively correct the aberration of the optical lens and reduce the tolerance sensitivity of the optical lens.

[0084] In an exemplary embodiment, the refractive index Nd7 of the seventh lens and the refractive index Nd8 of the eighth lens may satisfy: 0≤|Nd7-Nd8|≤0.2; and the dispersion coefficient Vd7 of the seventh lens and the dispersion coefficient Vd8 of the eighth lens may satisfy: 5.5≤|Vd7-Vd8|≤6.0. Reasonable configuration of the materials of the seventh lens and the eighth lens and optimization of the dispersion coefficients of the seventh lens and the eighth lens are conducive to correcting the aberration of the optical lens and also can eliminate the aberration generated by the seventh lens and the eighth lens.

[0085] In an exemplary embodiment, the effective focal length F9 of the ninth lens and the focal length F of the entire optical lens group may satisfy: 0.3≤F9 / F≤0.8. Reasonable configuration of the effective focal length of the ninth lens is conducive to re-converging the light emitted from the eighth lens and correcting the additional spherical aberration, coma and other aberrations of the optical lens.

[0086] In an exemplary embodiment, the effective focal length F10 of the tenth lens and the focal length F of the entire optical lens group can satisfy: -0.5≤F10 / F≤-0.2. Reasonable configuration of the effective focal length of the tenth lens is conducive to the divergence of light, thereby effectively controlling the CRA value of the optical lens and realizing large-surface imaging of the optical lens.

[0087] In an exemplary embodiment, the combined focal length F910 of the ninth lens and the tenth lens and the entire group focal length F of the optical lens may satisfy: -4.1≤F910 / F≤-1.1. Reasonable configuration of the combined focal length of the ninth lens and the tenth lens is conducive to correcting the additional aberration of the optical lens.

[0088] In an exemplary embodiment, the effective focal length F11 of the eleventh lens and the focal length F of the entire optical lens group may satisfy: 1.5≤F11 / F≤1.9. Reasonable configuration of the effective focal length of the eleventh lens can make the eleventh lens have an appropriate positive focal power, and compensate for the excessive negative focal power at the front end, ensuring that the focal power of the optical lens tends to be balanced, and at the same time, it is also conducive to correcting distortion and meeting the imaging requirements of low distortion.

[0089] In an exemplary embodiment, the center thickness CT5 of the fifth lens on the optical axis and the center thickness CT6 of the sixth lens on the optical axis may satisfy: 0.1≤CT5 / CT6≤0.3. Reasonable configuration of the center thickness ratio of the fifth lens and the sixth lens can reduce the sensitivity caused by thickness during processing, correct aberrations such as field curvature, and improve the imaging quality of the optical lens.

[0090] In an exemplary embodiment, the center thickness CT7 of the seventh lens on the optical axis and the center thickness CT8 of the eighth lens on the optical axis may satisfy: 0.1≤CT7 / CT8≤0.3. Reasonable configuration of the center thickness ratio of the seventh lens and the eighth lens can reduce the sensitivity caused by thickness during processing, correct aberrations such as field curvature, and improve the imaging quality of the optical lens.

[0091] In an exemplary embodiment, the maximum aperture D1 of the first lens and the total optical length TTL of the optical lens can satisfy: 0.1≤D1 / TTL≤0.5. Reasonable configuration of the ratio of the maximum aperture D1 of the first lens to the total optical length of the optical lens is conducive to miniaturization of the optical lens.

[0092] In an exemplary embodiment, the entire focal length F of the optical lens and the total optical length TTL of the optical lens may satisfy: 2.4≤TTL / F≤2.9. Reasonable configuration of the ratio of the entire focal length of the optical lens to the total optical length of the optical lens can shorten the total optical length of the optical lens and avoid the problem of poor overall performance of the optical lens caused by too small a value of TTL / F.

[0093] In an exemplary embodiment, the back focal length BFL of the optical lens and the total optical length TTL of the optical lens may satisfy: 0≤BFL / TTL≤0.3. Reasonable configuration of the ratio of the back focal length of the optical lens to the total optical length of the optical lens can enable the optical lens to have an appropriate back focal length, thereby avoiding the problem of incompatibility between the optical lens and the back-end chip due to too small a back focal length, thereby affecting the imaging quality of the optical lens.

[0094] In an exemplary embodiment, the chief light angle CRA of the optical lens can satisfy: CRA≤11.3°. Reasonable configuration of the chief light angle of the optical lens can make the optical lens adaptable to a variety of chips with large target surfaces, ensure that the optical lens has a wider application prospect, and enhance the market competitiveness of the optical lens.

[0095] In an exemplary embodiment, the aperture number FNO of the optical lens may satisfy: FNO≤1.3. In one example, FNO≤1.1. Reasonable configuration of the aperture number of the optical lens can enable the optical lens to have sufficient light transmission, ensuring that the optical lens achieves a good night vision effect.

[0096] In an exemplary embodiment, the imaging target surface of the optical lens can reach 1 / 1.8", thereby ensuring that the optical lens meets the imaging requirements of a large target surface.

[0097] In an exemplary embodiment, the distortion value of the optical lens is in the range of -6% to -2%, ensuring that the optical lens achieves low distortion.

[0098] The optical lens according to the above-mentioned embodiment of the present application may adopt multiple lenses, for example, the eleven lenses mentioned above, and by reasonably allocating optical parameters such as the focal length, surface shape, center thickness of each lens, and axial spacing between each lens, it is possible to achieve at least one of miniaturization, large aperture, large target surface, high resolution, and low distortion of the optical lens.

[0099] Those skilled in the art should understand that the total optical length TTL of the optical lens used above refers to the axial distance from the object side of the first lens to the imaging surface. The back focal length BFL of the optical lens refers to the axial distance from the image side of the eleventh lens to the imaging surface.

[0100] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification.

[0101] Specific embodiments of the optical lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0102] Example 1

[0103] The following reference Figure 1 An optical lens according to Example 1 of the present application is described.

[0104] like Figure 1 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10 and an eleventh lens L11 in order from the object side to the imaging surface IMG along the optical axis. The aperture STO is arranged between the second lens L2 and the third lens L3. The first lens L1 and the second lens L2 are cemented to form a cemented lens. The third lens L3 and the fourth lens L4 are cemented to form a cemented lens. The fifth lens L5 and the sixth lens L6 are cemented to form a cemented lens. The seventh lens L7 and the eighth lens L8 are cemented to form a cemented lens. The ninth lens L9 and the tenth lens L10 are cemented to form a cemented lens.

[0105] The first lens L1 has positive refractive power, and its object-side surface S1 is convex and its image-side surface is concave.

[0106] The second lens L2 has negative refractive power, an object-side surface S2 thereof is convex, and an image-side surface S3 thereof is concave.

[0107] The third lens L3 has positive refractive power, and its object-side surface S4 is convex and its image-side surface is convex.

[0108] The fourth lens L4 has negative refractive power, and its object-side surface S5 is concave, and its image-side surface S6 is concave.

[0109] The fifth lens L5 has negative refractive power, and its object-side surface S7 is concave and its image-side surface is concave.

[0110] The sixth lens L6 has positive refractive power, and its object-side surface S8 is convex and its image-side surface S9 is convex.

[0111] The seventh lens L7 has negative refractive power, and its object-side surface S10 is convex and its image-side surface is concave.

[0112] The eighth lens L8 has positive refractive power, and its object-side surface S11 is convex, and its image-side surface S12 is convex.

[0113] The ninth lens L9 has positive refractive power, and its object-side surface S13 is convex and its image-side surface is convex.

[0114] The tenth lens L10 has negative refractive power, and its object-side surface S14 is a concave surface, and its image-side surface S15 is a concave surface.

[0115] The eleventh lens L11 has positive refractive power, and its object-side surface S16 is convex, and its image-side surface S17 is concave.

[0116] A filter CG may also be provided between the eleventh lens L11 and the imaging surface IMG. The filter CG has an object side surface S18 and an image side surface S19. Light from the object passes through each surface S1 to S19 in sequence and is finally imaged on the imaging surface IMG. It should be noted that the surfaces S1 to S19 are Figure 1 Not shown.

[0117] Table 1 shows the basic parameters of the optical lens of Example 1, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm). The aperture number FNO of the optical lens is 1.1. The distortion value of the optical lens is -2.43%.

[0118]

[0119]

[0120] Table 1

[0121] Example 2

[0122] The following reference Figure 2 An optical lens according to Example 2 of the present application is described.

[0123] like Figure 2As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10 and an eleventh lens L11 in order from the object side to the imaging surface IMG along the optical axis. The aperture STO is arranged between the second lens L2 and the third lens L3. The first lens L1 and the second lens L2 are cemented to form a cemented lens. The third lens L3 and the fourth lens L4 are cemented to form a cemented lens. The fifth lens L5 and the sixth lens L6 are cemented to form a cemented lens. The seventh lens L7 and the eighth lens L8 are cemented to form a cemented lens. The ninth lens L9 and the tenth lens L10 are cemented to form a cemented lens.

[0124] The first lens L1 has positive refractive power, and its object-side surface S1 is convex and its image-side surface is concave.

[0125] The second lens L2 has negative refractive power, an object-side surface S2 thereof is convex, and an image-side surface S3 thereof is concave.

[0126] The third lens L3 has positive refractive power, and its object-side surface S4 is convex and its image-side surface is convex.

[0127] The fourth lens L4 has negative refractive power, and its object-side surface S5 is concave, and its image-side surface S6 is concave.

[0128] The fifth lens L5 has negative refractive power, and its object-side surface S7 is concave and its image-side surface is concave.

[0129] The sixth lens L6 has positive refractive power, and its object-side surface S8 is convex and its image-side surface S9 is convex.

[0130] The seventh lens L7 has negative refractive power, and its object-side surface S10 is convex and its image-side surface is concave.

[0131] The eighth lens L8 has positive refractive power, and its object-side surface S11 is convex, and its image-side surface S12 is convex.

[0132] The ninth lens L9 has positive refractive power, and its object-side surface S13 is convex and its image-side surface is convex.

[0133] The tenth lens L10 has negative refractive power, and its object-side surface S14 is a concave surface, and its image-side surface S15 is a concave surface.

[0134] The eleventh lens L11 has positive refractive power, and its object-side surface S16 is convex, and its image-side surface S17 is concave.

[0135] A filter CG may also be provided between the eleventh lens L11 and the imaging surface IMG. The filter CG has an object side surface S18 and an image side surface S19. Light from the object passes through each surface S1 to S19 in sequence and is finally imaged on the imaging surface IMG. It should be noted that the surfaces S1 to S19 are Figure 2 Not shown.

[0136] Table 2 shows the basic parameters of the optical lens of Example 2, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm). The aperture number FNO of the optical lens is 1.1. The distortion value of the optical lens is -2.27%.

[0137]

[0138]

[0139] Table 2

[0140] Example 3

[0141] The following reference Figure 3 An optical lens according to Example 3 of the present application is described.

[0142] like Figure 3 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10 and an eleventh lens L11 in order from the object side to the imaging surface IMG along the optical axis. The aperture STO is arranged between the second lens L2 and the third lens L3. The first lens L1 and the second lens L2 are cemented to form a cemented lens. The third lens L3 and the fourth lens L4 are cemented to form a cemented lens. The fifth lens L5 and the sixth lens L6 are cemented to form a cemented lens. The seventh lens L7 and the eighth lens L8 are cemented to form a cemented lens. The ninth lens L9 and the tenth lens L10 are cemented to form a cemented lens.

[0143] The first lens L1 has positive refractive power, and its object-side surface S1 is convex and its image-side surface is concave.

[0144] The second lens L2 has negative refractive power, an object-side surface S2 thereof is convex, and an image-side surface S3 thereof is concave.

[0145] The third lens L3 has positive refractive power, and its object-side surface S4 is convex and its image-side surface is convex.

[0146] The fourth lens L4 has negative refractive power, and its object-side surface S5 is concave, and its image-side surface S6 is concave.

[0147] The fifth lens L5 has negative refractive power, and its object-side surface S7 is concave and its image-side surface is concave.

[0148] The sixth lens L6 has positive refractive power, and its object-side surface S8 is convex and its image-side surface S9 is convex.

[0149] The seventh lens L7 has negative refractive power, and its object-side surface S10 is convex and its image-side surface is concave.

[0150] The eighth lens L8 has positive refractive power, and its object-side surface S11 is convex, and its image-side surface S12 is convex.

[0151] The ninth lens L9 has positive refractive power, and its object-side surface S13 is convex and its image-side surface is convex.

[0152] The tenth lens L10 has negative refractive power, and its object-side surface S14 is a concave surface, and its image-side surface S15 is a concave surface.

[0153] The eleventh lens L11 has positive refractive power, and its object-side surface S16 is convex, and its image-side surface S17 is concave.

[0154] A filter CG may also be provided between the eleventh lens L11 and the imaging surface IMG. The filter CG has an object side surface S18 and an image side surface S19. Light from the object passes through each surface S1 to S19 in sequence and is finally imaged on the imaging surface IMG. It should be noted that the surfaces S1 to S19 are Figure 3 Not shown.

[0155] Table 3 shows the basic parameters of the optical lens of Example 3, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm). The aperture number FNO of the optical lens is 1.1. The distortion value of the optical lens is -2.56%.

[0156]

[0157] Table 3

[0158] Example 4

[0159] The following reference Figure 4 An optical lens according to Example 4 of the present application is described.

[0160] like Figure 4As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10 and an eleventh lens L11 in order from the object side to the imaging surface IMG along the optical axis. The aperture STO is arranged between the second lens L2 and the third lens L3. The first lens L1 and the second lens L2 are cemented to form a cemented lens. The third lens L3 and the fourth lens L4 are cemented to form a cemented lens. The fifth lens L5 and the sixth lens L6 are cemented to form a cemented lens. The seventh lens L7 and the eighth lens L8 are cemented to form a cemented lens. The ninth lens L9 and the tenth lens L10 are cemented to form a cemented lens.

[0161] The first lens L1 has positive refractive power, and its object-side surface S1 is convex and its image-side surface is concave.

[0162] The second lens L2 has negative refractive power, an object-side surface S2 thereof is convex, and an image-side surface S3 thereof is concave.

[0163] The third lens L3 has positive refractive power, and its object-side surface S4 is convex and its image-side surface is convex.

[0164] The fourth lens L4 has negative refractive power, and its object-side surface S5 is concave, and its image-side surface S6 is concave.

[0165] The fifth lens L5 has negative refractive power, and its object-side surface S7 is concave and its image-side surface is concave.

[0166] The sixth lens L6 has positive refractive power, and its object-side surface S8 is convex and its image-side surface S9 is convex.

[0167] The seventh lens L7 has negative refractive power, and its object-side surface S10 is convex and its image-side surface is concave.

[0168] The eighth lens L8 has positive refractive power, and its object-side surface S11 is convex, and its image-side surface S12 is concave.

[0169] The ninth lens L9 has positive refractive power, and its object-side surface S13 is convex and its image-side surface is convex.

[0170] The tenth lens L10 has negative refractive power, and its object-side surface S14 is a concave surface, and its image-side surface S15 is a concave surface.

[0171] The eleventh lens L11 has positive refractive power, and its object-side surface S16 is convex, and its image-side surface S17 is concave.

[0172] A filter CG may also be provided between the eleventh lens L11 and the imaging surface IMG. The filter CG has an object side surface S18 and an image side surface S19. Light from the object passes through each surface S1 to S19 in sequence and is finally imaged on the imaging surface IMG. It should be noted that the surfaces S1 to S19 are Figure 4 Not shown.

[0173] Table 4 shows the basic parameters of the optical lens of Example 4, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm). The aperture number FNO of the optical lens is 1.1. The distortion value of the optical lens is -5.21%.

[0174]

[0175] Table 4

[0176] In summary, the conditional expressions in Examples 1 to 4 satisfy the relationship shown in Table 5.

[0177]

[0178]

[0179] Table 5

[0180] The present application also provides an imaging device, whose electronic photosensitive element may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS), and the imaging device is equipped with the optical lens described above.

[0181] 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 utility model 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 the technical features with similar functions disclosed in the present application (but not limited to) by each other.

Claims

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

3. The optical lens according to claim 1, characterized in that: The object side surface of the second lens is convex, and the image side surface is concave.

4. The optical lens according to claim 1, characterized in that: The object side surface of the third lens is convex, and the image side surface is convex.

5. The optical lens according to claim 1, characterized in that: The object side surface of the fourth lens is concave, and the image side surface is concave.

6. The optical lens according to claim 1, characterized in that: The object side surface of the fifth lens is concave, and the image side surface is concave.

7. The optical lens according to claim 1, characterized in that: The object-side surface of the sixth lens is convex, and the image-side surface is convex.

8. The optical lens according to claim 1, characterized in that: The object side surface of the seventh lens is convex, and the image side surface is concave.

9. The optical lens according to claim 1, characterized in that: The object side surface of the eighth lens is a convex surface.

10. The optical lens according to claim 1, characterized in that: The object side surface of the ninth lens is convex, and the image side surface is convex.

11. The optical lens according to claim 1, characterized in that: The object side surface of the tenth lens is a concave surface, and the image side surface is a concave surface.

12. The optical lens according to claim 1, characterized in that: The object side surface of the eleventh lens is convex, and the image side surface is concave.

13. The optical lens according to any one of claims 1 to 12, characterized in that: The effective focal length F1 of the first lens and the entire focal length F of the optical lens group satisfy: 1.7≤F1 / F≤3.

0.

14. The optical lens according to any one of claims 1 to 12, characterized in that: The effective focal length F2 of the second lens and the entire focal length F of the optical lens group satisfy: -2.8≤F2 / F≤-2.

0.

15. The optical lens according to any one of claims 1 to 12, characterized in that: The refractive index Nd1 of the first lens and the refractive index Nd2 of the second lens satisfy: 0.3≤|Nd1-Nd2|≤0.6; and the chromatic aberration coefficient Vd1 of the first lens and the chromatic aberration coefficient Vd2 of the second lens satisfy: 65≤|Vd1-Vd2|≤75.

16. The optical lens according to any one of claims 1 to 12, characterized in that: The effective focal length F3 of the third lens and the entire focal length F of the optical lens group satisfy: 0.4≤F3 / F≤0.

8.

17. The optical lens according to any one of claims 1 to 12, characterized in that: The effective focal length F4 of the fourth lens and the entire focal length F of the optical lens group satisfy: -0.6≤F4 / F≤-0.

3.

18. The optical lens according to any one of claims 1 to 12, characterized in that: The combined focal length F34 of the third lens and the fourth lens and the entire group focal length F of the optical lens satisfy: -6.1≤F34 / F≤-3.

6.

19. The optical lens according to any one of claims 1 to 12, characterized in that: The effective focal length F5 of the fifth lens and the entire focal length F of the optical lens group satisfy: -1.1≤F5 / F≤-0.

7.

20. The optical lens according to any one of claims 1 to 12, characterized in that: The effective focal length F6 of the sixth lens and the entire focal length F of the optical lens group satisfy: 0.6≤F6 / F≤1.

0.

21. The optical lens according to any one of claims 1 to 12, characterized in that: The combined focal length F56 of the fifth lens and the sixth lens and the entire group focal length F of the optical lens satisfy the following: 1.7≤F56 / F≤4.

5.

22. The optical lens according to any one of claims 1 to 12, characterized in that: A refractive index Nd5 of the fifth lens and a refractive index Nd6 of the sixth lens satisfy: 0.1≤|Nd5-Nd6|≤0.3; and an dispersion coefficient Vd5 of the fifth lens and an dispersion coefficient Vd6 of the sixth lens satisfy: 4.1≤|Vd5-Vd6|≤5.

9.

23. The optical lens according to any one of claims 1 to 12, characterized in that: The effective focal length F7 of the seventh lens and the entire focal length F of the optical lens group satisfy: -1.2≤F7 / F≤-0.

5.

24. The optical lens according to any one of claims 1 to 12, characterized in that: The effective focal length F8 of the eighth lens and the entire focal length F of the optical lens group satisfy: 0.3≤F8 / F≤0.

7.

25. The optical lens according to any one of claims 1 to 12, characterized in that: The combined focal length F78 of the seventh lens and the eighth lens and the entire group focal length F of the optical lens satisfy the following: 0.9≤F78 / F≤2.

3.

26. The optical lens according to any one of claims 1 to 12, characterized in that: A refractive index Nd7 of the seventh lens and a refractive index Nd8 of the eighth lens satisfy: 0≤|Nd7-Nd8|≤0.2; and an aberration coefficient Vd7 of the seventh lens and an aberration coefficient Vd8 of the eighth lens satisfy: 5.5≤|Vd7-Vd8|≤6.

0.

27. The optical lens according to any one of claims 1 to 12, characterized in that: The effective focal length F9 of the ninth lens and the entire focal length F of the optical lens group satisfy: 0.3≤F9 / F≤0.

8.

28. The optical lens according to any one of claims 1 to 12, characterized in that: The effective focal length F10 of the tenth lens and the entire focal length F of the optical lens group satisfy: -0.5≤F10 / F≤-0.

2.

29. The optical lens according to any one of claims 1 to 12, characterized in that: The combined focal length F910 of the ninth lens and the tenth lens and the entire group focal length F of the optical lens satisfy the following: -4.1≤F910 / F≤-1.

1.

30. The optical lens according to any one of claims 1 to 12, characterized in that: The effective focal length F11 of the eleventh lens and the entire focal length F of the optical lens group satisfy: 1.5≤F11 / F≤1.

9.

31. The optical lens according to any one of claims 1 to 12, characterized in that: A center thickness CT5 of the fifth lens on the optical axis and a center thickness CT6 of the sixth lens on the optical axis satisfy: 0.1≤CT5 / CT6≤0.

3.

32. The optical lens according to any one of claims 1 to 12, characterized in that: A center thickness CT7 of the seventh lens on the optical axis and a center thickness CT8 of the eighth lens on the optical axis satisfy: 0.1≤CT7 / CT8≤0.

3.

33. The optical lens according to any one of claims 1 to 12, characterized in that: The maximum full aperture D1 of the first lens and the total optical length TTL of the optical lens satisfy the following conditions: 0.1≤D1 / TTL≤0.

5.

34. The optical lens according to any one of claims 1 to 12, characterized in that: The entire focal length F of the optical lens and the total optical length TTL of the optical lens satisfy: 2.4≤TTL / F≤2.

9.

35. The optical lens according to any one of claims 1 to 12, characterized in that: The back focal length BFL of the optical lens and the total optical length TTL of the optical lens satisfy: 0≤BFL / TTL≤0.3.

Images