Optical lens

Abstract

The invention discloses an optical lens, which sequentially comprises a first lens with negative focal power from an object side to an image side along an optical axis, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power and a fifth lens with negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens has positive focal power; the fourth lens has positive or negative focal power; the fifth lens has positive or negative focal power; the sixth lens has positive or negative focal power; the seventh lens has positive focal power; the eighth lens has negative focal power; the ninth lens has positive focal power; the tenth lens has positive focal power; the eleventh lens has positive focal power, the object side surface of the eleventh lens is a convex surface, and the image side surface of the eleventh lens is a concave surface; the positive and negative focal powers of the fifth lens and the sixth lens are opposite; the number of the lenses with focal power in the optical lens is eleven.

Description

Technical Field

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

[0002] With the continuous upgrading and development of Internet technology, video lenses are widely used in shooting fields such as video conferencing, online teaching, and webcasting, and people's requirements for video lenses are getting higher and higher.

[0003] However, the existing video lenses generally have the following technical problems: 1) The existing lenses are relatively large in size and long in total length, and mostly use glass lenses, which cannot meet the requirements of consumers for portability; 2) The chip sizes that the existing lenses can match are relatively small, and higher image resolution and a wider field of view cannot be obtained; 3) The distortion of the existing lenses is generally large, and high-quality, real and accurate images and videos cannot be provided; 4) When the existing lenses ensure a large field of view, the imaging clarity is poor, and various aberrations are also large, thus affecting the overall quality of the image. Summary of the Invention

[0004] This application provides an optical lens, which sequentially includes, from the object side to the image side along the optical axis: a first lens with a negative optical power, whose object side is convex and image side is concave; a second lens with a negative optical power, whose object side is convex and image side is concave; a third lens with a positive optical power; a fourth lens with a positive or negative optical power; a fifth lens with a positive or negative optical power; a sixth lens with a positive or negative optical power; a seventh lens with a positive optical power; an eighth lens with a negative optical power; a ninth lens with a positive optical power; a tenth lens with a positive optical power; and an eleventh lens with a positive optical power, whose object side is convex and image side is concave; the positive and negative optical powers of the fifth lens and the sixth lens of this optical lens are opposite.

[0005] According to an exemplary embodiment of this application, the object side of the third lens of this optical lens is convex and the image side is concave; the object side of the fourth lens is concave and the image side is convex; the object side of the fifth lens is convex, flat or concave, and the image side is convex or concave; the object side of the sixth lens is convex or concave, and the image side is convex; the object side of the seventh lens is convex or concave, and the image side is convex; the object side of the eighth lens is concave, and the image side is convex or concave; the object side of the ninth lens is convex, and the image side is convex or concave; the object side of the tenth lens is concave, and the image side is convex.

[0006] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions: -2.95 ≤ f12 / f ≤ -2.11, -2.2 ≤ f2 / f ≤ -1.3, 1.06 ≤ (R21 + R22) / (R21 - R22) ≤ 1.65, where f12 is the combined effective focal length of the first lens and the second lens, f2 is the effective focal length of the second lens, f is the total effective focal length of the optical lens, R21 is the radius of curvature of the object side surface of the second lens, and R22 is the radius of curvature of the image side surface of the second lens.

[0007] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions: 0.80 ≤ D31 / R31 ≤ 1.56, 0.58 ≤ R41 / R42 ≤ 1.32, where D31 is the maximum optical aperture of the object side surface of the third lens, R31 is the radius of curvature of the object side surface of the third lens, R41 is the radius of curvature of the object side surface of the fourth lens, and R42 is the radius of curvature of the image side surface of the fourth lens.

[0008] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions: -3.44 ≤ f5 / f ≤ 1.19, -2.72 ≤ f6 / f ≤ 1.83, -2.90 ≤ f5 / f6 ≤ -0.40, where f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, and f is the total effective focal length of the optical lens.

[0009] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions: 1.42 ≤ f7 / f ≤ 2.75, -2.58 ≤ f8 / f ≤ -0.84, -1.92 ≤ f7 / f8 ≤ -0.88, where f7 is the effective focal length of the seventh lens, f8 is the effective focal length of the eighth lens, and f is the total effective focal length of the optical lens.

[0010] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions: 1.90 ≤ fB / f ≤ 3.28, -3.07 ≤ fa / fb ≤ -1.04, where fB is the combined effective focal length of the ninth lens to the eleventh lens, fa is the combined effective focal length of the first lens to the fourth lens, fb is the combined effective focal length of the fifth lens to the eleventh lens, and f is the total effective focal length of the optical lens.

[0011] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions: 2.87 ≤ |Vd5 - Vd6| ≤ 25, 0.26 ≤ |Nd8 - Nd7| ≤ 0.56, 50.30 ≤ |Vd7 - Vd8| ≤ 84.83, where Vd5 is the Abbe number of the fifth lens, Vd6 is the Abbe number of the sixth lens, Nd8 is the refractive index of the eighth lens, Nd7 is the refractive index of the seventh lens, Vd7 is the Abbe number of the seventh lens, and Vd8 is the Abbe number of the eighth lens.

[0012] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions: 6.22 ≤ TTL / f ≤ 8.53, 2.85° / mm 2 ≤ FOV / (H*f) ≤ 3.63° / mm 2 where TTL is the overall optical length of the optical lens, f is the total effective focal length of the optical lens, FOV is the full field of view angle of the optical lens, and H is the full image height of the optical lens.

[0013] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions: -2.69 ≤ f12 / f ≤ -2.35, -2.00 ≤ f2 / f ≤ -1.43, 1.18 ≤ (R21 + R22) / (R21 - R22) ≤ 1.50, 0.89 ≤ D31 / R31 ≤ 1.42, 0.64 ≤ R41 / R42 ≤ 1.21, -3.17 ≤ f5 / f ≤ 1.09, -2.48 ≤ f6 / f ≤ 1.67, -2.65 ≤ f5 / f6 ≤ -0.44, 1.57 ≤ f7 / f ≤ 2.50, -2.36 ≤ f8 / f ≤ -0.93, -1.75 ≤ f7 / f8 ≤ -0.98, 2.10 ≤ fB / f ≤ 2.99, -2.80 ≤ fa / fb ≤ -1.15, 3.19 ≤ |Vd5 - Vd6| ≤ 22.73, 0.28 ≤ |Nd8 - Nd7| ≤ 0.51, 55.89 ≤ |Vd7 - Vd8| ≤ 77.12, 6.90 ≤ TTL / f ≤ 7.77, 3.16° / mm 2 ≤ FOV / (H*f) ≤ 3.31° / mm 2, where f12 is the combined effective focal length of the first lens and the second lens, f2 is the effective focal length of the second lens, f is the total effective focal length of the optical lens, R21 is the curvature radius of the object side surface of the second lens, R22 is the curvature radius of the image side surface of the second lens, D31 is the maximum optical aperture of the object side surface of the third lens, R31 is the curvature radius of the object side surface of the third lens, R41 is the curvature radius of the object side surface of the fourth lens, R42 is the curvature radius of the image side surface of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, f8 is the effective focal length of the eighth lens, fB is the combined effective focal length of the ninth lens to the eleventh lens, fa is the combined effective focal length of the first lens to the fourth lens, fb is the combined effective focal length of the fifth lens to the eleventh lens, Vd5 is the Abbe number of the fifth lens, Vd6 is the Abbe number of the sixth lens, Nd8 is the refractive index of the eighth lens, Nd7 is the refractive index of the seventh lens, Vd7 is the Abbe number of the seventh lens, Vd8 is the Abbe number of the eighth lens, TTL is the total optical length of the optical lens, FOV is the full field of view angle of the optical lens, and H is the full image height of the optical lens.

[0014] By reasonably setting the number of lenses (e.g., eleven) of the optical lens of the present application, and reasonably distributing the optical power of each lens and optimizing the surface shape of each lens, the optical lens provided by the present application simultaneously satisfies the characteristics of miniaturization (TTL≤27.5mm), large target surface (matching 1 / 1.8" chip), large field of view angle (FOV≥103°), low distortion (absolute value of optical distortion |DIS|≤3%), and high resolution of 20MP. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objectives, and advantages of the present application will become more apparent:

[0016] Figure 1 is a schematic structural diagram of the optical lens according to Embodiment 1 of the present application;

[0017] Figure 2 is a schematic structural diagram of the optical lens according to Embodiment 2 of the present application;

[0018] Figure 3 is a schematic structural diagram of the optical lens according to Embodiment 3 of the present application;

[0019] Figure 4 is a schematic structural diagram of the optical lens according to Embodiment 4 of the present application;

[0020] Figure 5 is a schematic structural diagram of the optical lens according to Embodiment 5 of the present application;

[0021] Figure 6Schematic diagram of the structure of the optical lens according to Embodiment 6 of the present application;

[0022] Figure 7 Schematic diagram of the structure of the optical lens according to Embodiment 7 of the present application;

[0023] Figure 8 Schematic diagram of the structure of the optical lens according to Embodiment 8 of the present application. Detailed implementation manners

[0024] To better understand the present application, more detailed descriptions of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of the exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0025] It should be noted that in this specification, the expressions such as 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 teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0026] In the drawings, for the sake of clarity, the thickness, size and shape of the lenses have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn to an exact scale.

[0027] In this document, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object being photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

[0028] It should also be understood that the terms "comprising", "having", "including", etc., when used in this specification, mean 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 their combinations. In addition, when an expression such as "at least one of..." appears after a list of listed features, it modifies the entire list of listed features rather than individual elements in the list. In addition, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0029] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0030] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments may be combined with each other. The following will detail this application with reference to the drawings and in combination with the embodiments.

[0031] According to an exemplary embodiment of the present application, an optical lens may sequentially include eleven lenses with optical power along the optical axis from the object side to the image side, 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.

[0032] In the exemplary embodiment, the first lens of the optical lens has a negative optical power. The object side surface of the first lens is convex, and the image side surface is concave. Such a setting can effectively converge the incident light with a large field of view into the optical system, effectively expanding the field of view.

[0033] In the exemplary embodiment, the second lens of the optical lens has a negative optical power. The object side surface of the second lens is convex, and the image side surface is concave. Such a setting is beneficial to controlling the trend of light, enabling the light to transition smoothly, effectively correcting the generation of aberration and spherical aberration, and improving the resolution of the lens; at the same time, it is beneficial to converging the light with a large field of view, and by effectively controlling the trend of light, it helps to reduce the optical apertures of the third lens and the fourth lens behind.

[0034] In the exemplary embodiment, the third lens of the optical lens has a positive optical power. The object side surface of the third lens is convex, and the image side surface is concave. Such a setting can be beneficial to compensating for the astigmatism generated by the light passing through the first lens and the second lens, and improving the resolution performance of the lens.

[0035] In the exemplary embodiment, the fourth lens of the optical lens has a positive or negative optical power. The object side surface of the fourth lens is concave, and the image side surface is convex. At the same time, the fourth lens is a plastic aspherical lens. Such a setting can effectively correct the high-order aberration generated by the light passing through the lenses in front of the fourth lens, reduce the aberration correction pressure of the optical system of the lenses behind the fourth lens, and is beneficial to achieving high image quality of the lens.

[0036] In an exemplary embodiment, the fifth lens of the optical lens has a positive or negative optical power, and the sixth lens has a positive or negative optical power. When the optical power of the fifth lens is positive, its object side is convex and its image side is convex; when the optical power of the fifth lens is negative, its object side is concave or flat and its image side is concave. When the optical power of the sixth lens is positive, its object side is convex and its image side is convex; when the optical power of the sixth lens is negative, its object side is concave and its image side is convex. Such an arrangement can effectively correct spherical aberration through the combination of positive and negative lenses, and at the same time can also reduce the incident angle of light on the object sides of the fifth and sixth lenses, thereby effectively reducing the tolerance sensitivity and improving the production yield of the optical lens; it can also effectively correct axial chromatic aberration and improve the quality of the lens.

[0037] In an exemplary embodiment, since the curvature radius value of the object side of the fifth lens is relatively large, it is easy for the convex, flat, and concave surfaces to change or be finely adjusted with each other, and generally has a small impact on the overall technical effect of the optical system. Those skilled in the art can use the surface with a relatively large curvature radius as an optimized boundary condition. Obviously, no creative effort is required.

[0038] In an exemplary embodiment, the fifth lens and the sixth lens of the optical lens can form a doublet lens group.

[0039] In an exemplary embodiment, the seventh lens of the optical lens has a positive optical power, and the eighth lens has a negative optical power. The object side of the seventh lens is convex or concave, and the image side is convex. The object side of the eighth lens is concave, and the image side is convex or concave. Such an arrangement can effectively control the trend of light through the combination of positive and negative lenses, make the light transition smoothly, effectively reduce the tolerance sensitivity of the lens, and improve the production yield of the lens; at the same time, it also helps to correct the lateral chromatic aberration of the optical system and improve the lens quality.

[0040] In an exemplary embodiment, the seventh lens and the eighth lens of the optical lens can form a doublet lens group.

[0041] In an exemplary embodiment, the seventh lens can be made of a glass lens material with a high Abbe number, and the eighth lens can be made of a lens material with a low Abbe number. Through the combination of lens materials with high and low Abbe numbers, it helps to correct the lateral chromatic aberration of the optical system and improve the quality of the lens.

[0042] In an exemplary embodiment, the ninth lens of the optical lens has a positive optical power. The object side of the ninth lens is convex, and the image side is convex or concave. Such an arrangement is beneficial to controlling the trend of light, making the light transfer smoothly, and is beneficial to achieving a large target surface; at the same time, it can also effectively reduce the tolerance sensitivity between the lenses and improve the yield.

[0043] In an exemplary embodiment, the tenth lens of the optical lens has a positive optical power. The object side of the tenth lens is concave, and the image side is convex; at the same time, both the object side and the image side of the tenth lens include at least one inflection point. Such a setting is beneficial to correcting distortion and realizing the characteristic of low distortion of the lens; at the same time, it can also effectively balance the aberration of the edge field of view of the optical system, ensuring high image quality of the edge field of view under the condition of meeting low distortion. In addition, it can also effectively control the trend of light, further elevate the light, which is beneficial to matching the CRA of the chip and helps to realize the large target surface of the lens.

[0044] In an exemplary embodiment, the eleventh lens of the optical lens has a positive optical power. The object side of the eleventh lens is convex, and the image side is concave; at the same time, both the object side and the image side of the eleventh lens include at least one inflection point. Such a setting is beneficial to correcting distortion and realizing the characteristic of low distortion of the lens; at the same time, it can also effectively balance the aberration of the edge field of view of the optical system, ensuring high image quality of the edge field of view under the condition of meeting low distortion. In addition, it can also effectively control the trend of light, making the light transition smoothly to the image plane, which is beneficial to matching the CRA of the chip and helps to realize the large target surface of the lens.

[0045] In an exemplary embodiment, the optical lens satisfies: -2.95 ≤ f12 / f ≤ -2.11, where f12 is the combined effective focal length of the first lens and the second lens, and f is the total effective focal length of the optical lens. By reasonably controlling the ratio of the combined effective focal length of the first lens and the second lens to the total effective focal length of the optical lens, it helps to converge the light of the large field of view to enter the optical system smoothly, expand the field of view angle, and at the same time reduce the generation of aberration and spherical aberration of the optical system, improving the resolution quality of the lens. Exemplarily, the optical lens may also satisfy: -2.69 ≤ f12 / f ≤ -2.35.

[0046] In an exemplary embodiment, the optical lens satisfies: -2.2 ≤ f2 / f ≤ -1.3, where f2 is the effective focal length of the second lens, and f is the total effective focal length of the optical lens. By reasonably controlling the ratio of the effective focal length of the second lens to the total effective focal length of the optical lens, it effectively controls the smooth transmission of light, reduces the generation of aberration and spherical aberration of the optical system, and improves the resolution quality of the lens. Exemplarily, the optical lens may also satisfy: -2.00 ≤ f2 / f ≤ -1.43.

[0047] In an exemplary embodiment, the optical lens satisfies: 1.06 ≤ (R21 + R22) / (R21 - R22) ≤ 1.65, where R21 is the radius of curvature of the object side surface of the second lens, and R22 is the radius of curvature of the image side surface of the second lens. By reasonably configuring the radii of curvature of the object side surface and the image side surface of the second lens, the change in the lens shape of the second lens is effectively constrained, the trend of light is effectively controlled, the light is further converged, and it helps to reduce the optical apertures of the third lens and the fourth lens. Exemplarily, the optical lens may further satisfy: 1.18 ≤ (R21 + R22) / (R21 - R22) ≤ 1.50.

[0048] In an exemplary embodiment, the optical lens satisfies: 0.80 ≤ D31 / R31 ≤ 1.56, where D31 is the maximum optical aperture of the object side surface of the third lens, and R31 is the radius of curvature of the object side surface of the third lens. By reasonably configuring the ratio of the maximum optical aperture of the object side surface of the third lens to the radius of curvature of the object side surface of the third lens, the trend of light is effectively controlled, which is beneficial to compensating for the astigmatism generated when light passes through the first lens and the second lens, and improving the resolution performance of the lens. Exemplarily, the optical lens may further satisfy: 0.89 ≤ D31 / R31 ≤ 1.42.

[0049] In an exemplary embodiment, the optical lens satisfies: 0.58 ≤ R41 / R42 ≤ 1.32, where R41 is the radius of curvature of the object side surface of the fourth lens, and R42 is the radius of curvature of the image side surface of the fourth lens. By reasonably allocating the radii of curvature of the object side surface and the image side surface of the fourth lens, the change in the lens shape of the fourth lens is effectively constrained, the trend of light can be controlled, the light is ensured to be transmitted smoothly when passing through the aperture, the high-order aberration generated when the light passes through the first lens to the aperture is effectively corrected, the aberration correction pressure at the rear of the optical system is reduced, and the resolution performance of the lens is improved. Exemplarily, the optical lens may further satisfy: 0.64 ≤ R41 / R42 ≤ 1.21.

[0050] In an exemplary embodiment, the optical lens satisfies: -3.44 ≤ f5 / f ≤ 1.19, where f5 is the effective focal length of the fifth lens, and f is the total effective focal length of the optical lens. By reasonably configuring the ratio of the effective focal length of the fifth lens to the total effective focal length of the optical lens, the trend of light is effectively controlled, which helps to reduce the incident angle of the light on the object side surface of the fifth lens after passing through the aperture, is beneficial to correcting spherical aberration, and improving the resolution performance of the lens. Exemplarily, the optical lens may further satisfy: -3.17 ≤ f5 / f ≤ 1.09.

[0051] In an exemplary embodiment, the optical lens satisfies: -2.72 ≤ f6 / f ≤ 1.83, where f6 is the effective focal length of the sixth lens and f is the total effective focal length of the optical lens. By reasonably configuring the ratio of the effective focal length of the sixth lens to the total effective focal length of the optical lens, the trend of light is effectively controlled, enabling the light to transition smoothly, which helps reduce the tolerance sensitivity and improve the production yield of the lens; in addition, it can also effectively correct the axial chromatic aberration and improve the lens quality. Exemplarily, the optical lens may also satisfy: -2.48 ≤ f6 / f ≤ 1.67.

[0052] In an exemplary embodiment, the optical lens satisfies: -2.90 ≤ f5 / f6 ≤ -0.40, where f5 is the effective focal length of the fifth lens and f6 is the effective focal length of the sixth lens. By reasonably setting the ratio of the effective focal lengths of the fifth lens and the sixth lens, the positive and negative lenses are paired to effectively correct spherical aberration and chromatic aberration, improving the resolution performance of the lens; at the same time, it can reduce the incident angle of light on the object sides of the fifth lens and the sixth lens, enabling the light to be transmitted smoothly, thereby effectively reducing the tolerance sensitivity of the fifth lens and the sixth lens and improving the production yield; in addition, it can also effectively correct the axial chromatic aberration and improve the lens quality. Exemplarily, the optical lens may also satisfy: -2.65 ≤ f5 / f6 ≤ -0.44.

[0053] In an exemplary embodiment, the optical lens satisfies: 1.42 ≤ f7 / f ≤ 2.75, where f7 is the effective focal length of the seventh lens and f is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the seventh lens to the total effective focal length of the optical lens, it is beneficial to control the trend of light, effectively raising the transmission height of the light, which helps the optical lens achieve a large target surface. Exemplarily, the optical lens may also satisfy: 1.57 ≤ f7 / f ≤ 2.50.

[0054] In an exemplary embodiment, the optical lens satisfies: -2.58 ≤ f8 / f ≤ -0.84, where f8 is the effective focal length of the eighth lens and f is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the eighth lens to the total effective focal length of the optical lens, the trend of light is effectively controlled, enabling the light to transition smoothly, effectively reducing the tolerance sensitivity of the lens and improving the production yield of the lens; at the same time, it also helps correct the lateral chromatic aberration of the optical system and improve the lens quality. Exemplarily, the optical lens may also satisfy: -2.36 ≤ f8 / f ≤ -0.93.

[0055] In an exemplary embodiment, the optical lens satisfies: -1.92 ≤ f7 / f8 ≤ -0.88, where f7 is the effective focal length of the seventh lens and f8 is the effective focal length of the eighth lens. By reasonably allocating the ratio of the effective focal lengths of the seventh lens and the eighth lens, and through the mutual cooperation of positive and negative lenses, the trend of light is effectively controlled, enabling the light to transition smoothly, which is beneficial to balancing the aberrations of the optical system and improving the lens resolution; at the same time, the tolerance sensitivity between the seventh lens and the eighth lens can be effectively reduced, and the production yield of the lens can be improved. More specifically, f7 and f8 can further satisfy -1.75 ≤ f7 / f8 ≤ -0.98.

[0056] In an exemplary embodiment, the optical lens satisfies: 1.90 ≤ fB / f ≤ 3.28, where fB is the combined effective focal length of the ninth lens to the eleventh lens, and f is the total effective focal length of the optical lens. By reasonably controlling the ratio of the combined effective focal length of the ninth lens to the eleventh lens to the total effective focal length of the optical lens, it helps to correct distortion and achieve the low-distortion characteristic of the lens; at the same time, the trend of light is effectively controlled, raising the transmission height of the light, and achieving a large image circle of the lens. Exemplarily, the optical lens can further satisfy: 2.10 ≤ fB / f ≤ 2.99.

[0057] In an exemplary embodiment, the optical lens satisfies: -3.07 ≤ fa / fb ≤ -1.04, where fa is the combined effective focal length of the first lens to the fourth lens, and fb is the combined effective focal length of the fifth lens to the eleventh lens. By reasonably matching the ratio of the combined effective focal length of the first lens to the fourth lens and the combined effective focal length of the fifth lens to the eleventh lens, it helps to correct distortion and achieve the low-distortion characteristic of the lens; at the same time, it helps to balance various aberrations and spherical aberration of the optical system and improve the resolution performance of the lens. Exemplarily, the optical lens can further satisfy: -2.80 ≤ fa / fb ≤ -1.15.

[0058] In an exemplary embodiment, the optical lens satisfies at least one of the following conditional expressions: 2.87 ≤ |Vd5 - Vd6| ≤ 25, 50.30 ≤ |Vd7 - Vd8| ≤ 84.83, where Vd5 is the Abbe number of the fifth lens, Vd6 is the Abbe number of the sixth lens, Vd7 is the Abbe number of the seventh lens, and Vd8 is the Abbe number of the eighth lens. By reasonably setting the Abbe numbers of the fifth lens, the sixth lens, the seventh lens, and the eighth lens, the axial chromatic aberration is effectively corrected, and the resolution performance of the lens is improved. Exemplarily, the optical lens can further satisfy: 3.19 ≤ |Vd5 - Vd6| ≤ 22.73, 55.89 ≤ |Vd7 - Vd8| ≤ 77.12.

[0059] In an exemplary embodiment, the optical lens satisfies: 0.26 ≤ |Nd8 - Nd7| ≤ 0.56, where Nd8 is the refractive index of the eighth lens and Nd7 is the refractive index of the seventh lens. By reasonably setting the refractive indices of the seventh lens and the eighth lens, the trend of light is effectively controlled, enabling the light to transition smoothly, effectively reducing the tolerance sensitivity of the lens, and improving the production yield of the lens. At the same time, various aberrations are effectively balanced, and the resolution performance of the lens is improved. Exemplarily, the optical lens may also satisfy: 0.28 ≤ |Nd8 - Nd7| ≤ 0.51.

[0060] In an exemplary embodiment, the optical lens satisfies: 6.22 ≤ TTL / f ≤ 8.53, where TTL is the overall optical length of the optical lens and f is the total effective focal length of the optical lens. When the focal length value of a certain optical system is given, by controlling the overall optical length of the optical system, a smaller overall optical length of the optical system is beneficial for achieving a small volume. Exemplarily, the optical lens may also satisfy 6.90 ≤ TTL / f ≤ 7.77.

[0061] In an exemplary embodiment, the optical lens satisfies: 2.85° / mm 2 ≤ FOV / (H*f) ≤ 3.63° / mm 2 , where f is the total effective focal length of the optical lens, FOV is the full field of view angle of the optical lens, and H is the full image height of the optical lens. Reasonably setting the maximum full field of view angle, full image height, and total effective focal length of the optical lens helps to correct the distortion of the optical system and achieve the low distortion characteristic of the lens. At the same time, when the focal length value of a certain optical system is given, the characteristics of a large target surface and a large field of view angle of the lens can be achieved. Exemplarily, the optical lens may also satisfy 3.16° / mm 2 ≤ FOV / (H*f) ≤ 3.31° / mm 2 .

[0062] In an exemplary embodiment, by adopting a combination of spherical lenses and aspherical lenses in the present application, it is beneficial to reduce the processing difficulty of the lenses. At the same time, through material combination, an athermal design can be achieved. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on reflecting the imaging quality, the number of aspherical lenses can be increased, and even all lenses can be aspherical lenses. The characteristic of an aspherical lens is that the curvature continuously changes from the center to the periphery of the lens. Different from a spherical lens with a constant curvature from the center to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After adopting an aspherical lens, it is possible to eliminate the aberrations that occur during imaging as much as possible, thereby improving the imaging quality of the lens. Exemplarily, among the first lens to the eleventh lens in the present application, the second lens, the third lens, the fourth lens, the ninth lens, the tenth lens, and the eleventh lens are all aspherical lenses, and the remaining lenses are all spherical lenses.

[0063] Those skilled in the art should understand that the temperature coefficient of refractive index dn / dt and the abnormal dispersion of plastics are relatively large. A reasonable combination of an appropriate amount of plastic materials is beneficial to the balance between high and low temperatures, but too many plastic lenses are not conducive to the system stability. The optical lenses made of glass can suppress the shift of the back focal length of the optical lens with temperature changes to improve the system stability; at the same time, using glass materials can avoid the problem that the imaging of the lens is blurred due to the high and low temperature changes in the use environment, which affects the normal use of the lens. Using glass materials is beneficial to the athermalization of the lens. In addition, using glass materials can also better correct the chromatic aberration of the system, improve the resolution of the lens, and at the same time reduce the generation of ghost images. As an example, in this application, the second lens, the third lens, the fourth lens, the ninth lens, the tenth lens, and the eleventh lens are made of plastic materials, and the rest of the lenses are made of glass materials. Such a setting can enable the optical lens to have a wide temperature range and can maintain stable optical performance within a certain range.

[0064] In an exemplary embodiment, the total optical length TTL of the optical lens of this application can satisfy: TTL≤27.5mm. The total optical length is short and the structure is compact, which can realize the miniaturization of the lens.

[0065] In an exemplary embodiment, the image height H corresponding to the maximum field of view angle of the optical lens of this application can satisfy: H≥8.9mm. Further, H can satisfy: 8.9mm≤H≤9.0mm, which can be adapted to a 1 / 1.8” chip and can realize a large target surface of the lens.

[0066] In an exemplary embodiment, the field of view angle FOV of the optical lens of this application satisfies: FOV≥103°, which can ensure that the optical lens has the characteristics of a large field of view angle and a wide field of vision.

[0067] The optical lens of this application may further include a diaphragm for restricting the light beam. The diaphragm is beneficial to converging the light rays entering the optical lens, reducing the maximum light passing aperture of the optical lens, and reducing the assembly sensitivity of the optical system to further improve the imaging quality of the optical lens. It should be noted that the diaphragm can be set at any position between or on one side of any lenses according to actual needs. Exemplarily, the diaphragm is set between the fourth lens and the fifth lens.

[0068] The optical lens of this application has excellent resolution. When the spatial frequency is 250lp / mm, the MTF values of the central field of view are all above 0.46, and the MTF values of the entire field of view are all above 0.2, which can be combined with a camera to achieve the high-resolution characteristic of 20MP.

[0069] Optionally, in other alternative exemplary embodiments, the above optical lens can further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0070] However, those skilled in the art should understand that, without departing from the technical solutions claimed in this application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification. For example, although eleven lenses are described as an example in the embodiments, the optical lens is not limited to including eleven lenses. If necessary, the optical lens may also include other numbers of lenses.

[0071] Specific embodiments of the optical lens applicable to the above embodiments will be further described below with reference to the accompanying drawings.

[0072] Embodiment 1

[0073] Figure 1 A schematic structural diagram of the optical lens according to Embodiment 1 of this application is shown. As Figure 1 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, and an eleventh lens L11 along the optical axis from the object side to the image side.

[0074] The first lens L1 has a negative optical power, its object side surface S1 is convex, and its image side surface S2 is concave.

[0075] The second lens L2 has a negative optical power, its object side surface S3 is convex, and its image side surface S4 is concave.

[0076] The third lens L3 has a positive optical power, its object side surface S5 is convex, and its image side surface S6 is concave.

[0077] The fourth lens L4 has a positive optical power, its object side surface S7 is concave, and its image side surface S8 is convex.

[0078] The fifth lens L5 has a negative optical power, its object side surface S10 is flat, and its image side surface S11 is concave.

[0079] The sixth lens L6 has a positive optical power, its object side surface S11 is convex, and its image side surface S12 is convex.

[0080] The seventh lens L7 has a positive optical power, its object side surface S13 is convex, and its image side surface S14 is convex.

[0081] The eighth lens L8 has a negative optical power, its object side surface S14 is concave, and its image side surface S15 is concave.

[0082] The ninth lens L9 has a positive optical power, its object side surface S16 is convex, and its image side surface S17 is concave.

[0083] The tenth lens L10 has a positive focal power, its object side S18 is concave, and its image side S19 is convex.

[0084] The eleventh lens L11 has a positive focal power, its object side S20 is convex, and its image side S21 is concave.

[0085] Among them, the fifth lens L5 and the sixth lens L6 form a doublet lens, and the seventh lens L7 and the eighth lens L8 form a doublet lens.

[0086] The optical lens further includes a diaphragm STO, and the diaphragm STO can be disposed between the fourth lens L4 and the fifth lens L5.

[0087] The optical lens may further include a filter (not shown) having an object side and an image side and / or a protective glass CG having an object side S22 and an image side S23. The filter can be used to correct color deviation, and the protective glass CG can be used to protect the image sensing chip located at the imaging surface. The light from the object sequentially passes through the surfaces S1 to S23 and finally forms an image on the imaging surface IMG. It should be noted that the surfaces S1 to S23 are not shown in Figure 1 not shown.

[0088] Table 1 shows the basic parameter table of the optical lens of Embodiment 1, where the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0089] Table 1

[0090]

[0091] In Embodiment 1, the object sides and the image sides of the second lens, the third lens, the fourth lens, the ninth lens, the tenth lens, and the eleventh lens are all aspherical surfaces, and the surface shapes of the aspherical lenses can be defined by, but not limited to, the following aspherical formula:

[0092]

[0093] where x is the sagitta of the distance from the vertex of the aspherical surface when the aspherical surface is at a position with a height of h along the optical axis direction; c is the paraxial curvature of the aspherical surface, c = 1 / R (that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the conic coefficient k and the high-order term coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each aspherical mirror surface in Embodiment 1.

[0094] Table 2

[0095] Face number k A4 A6 A8 A10 A12 A14 A16 S3 0.00 1.25E-03 -2.41E-05 7.85E-07 -1.07E-08 8.59E-11 5.75E-13 0.00E+00 S4 -0.61 2.28E-04 9.38E-05 -3.01E-06 2.37E-07 1.21E-08 -1.99E-09 0.00E+00 S5 0.46 9.54E-04 2.35E-04 -1.89E-05 1.74E-06 -1.38E-07 -3.14E-09 0.00E+00 S6 4.20 5.52E-03 6.11E-04 -7.61E-05 3.08E-05 -5.25E-06 2.37E-08 0.00E+00 S7 -0.96 -4.32E-04 -5.85E-05 1.66E-05 -1.24E-05 1.25E-06 -4.59E-08 0.00E+00 S8 -0.13 6.85E-04 -6.88E-04 3.82E-04 -1.12E-04 1.64E-05 -8.96E-07 0.00E+00 S16 0.00 -1.50E-03 1.57E-04 3.33E-06 -2.08E-06 1.29E-07 -1.74E-09 0.00E+00 S17 0.00 -2.97E-03 3.41E-04 -2.75E-05 5.59E-07 3.07E-08 -5.79E-10 0.00E+00 S18 0.68 1.11E-02 -5.81E-04 1.75E-05 -8.61E-08 3.68E-08 -1.83E-09 0.00E+00 S19 -0.29 8.76E-03 3.01E-04 -4.54E-05 2.18E-06 -2.10E-08 -9.26E-11 0.00E+00 S20 -0.20 -1.04E-02 1.03E-04 3.45E-05 -3.71E-06 6.37E-08 2.86E-09 0.00E+00 S21 -0.24 -1.53E-02 8.64E-04 -3.68E-05 5.20E-07 6.99E-09 -7.69E-11 0.00E+00

[0096] When the spatial frequency of the optical lens of Embodiment 1 is 250 lp / mm, the MTF values within the entire field of view are all above 0.2, and the MTF value of the central field of view is above 0.53, indicating that the optical lens has good imaging quality and good detail resolution ability; and the absolute value of its optical distortion |DIS| ≤ |-2.89%|, indicating that the optical lens has low distortion characteristics.

[0097] Embodiment 2

[0098] Figure 2 Fig. shows a schematic structural diagram of the optical lens of Embodiment 2 of the present application.

[0099] As Figure 2 shown, compared with Embodiment 1, the main differences of Embodiment 2 of the present application are: the object side surface S10 of the fifth lens L5 is concave; the image side surface S15 of the eighth lens L8 is convex; the optical parameters such as the radius of curvature of each lens surface, the lens thickness, and the distance between lenses are different.

[0100] Table 3 shows the basic parameter table of the optical lens of Embodiment 2, where the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0101] Table 3

[0102]

[0103]

[0104] In Embodiment 2, the object side surfaces and image side surfaces of the second lens, the third lens, the fourth lens, the ninth lens, the tenth lens, and the eleventh lens are all aspherical surfaces, and the surface types of each aspherical lens can be defined by, but are not limited to, the formula (1) given in Embodiment 1 above. Table 4 below gives the conic coefficients k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each aspherical mirror surface in Embodiment 2.

[0105] Table 4

[0106] Face number k A4 A6 A8 A10 A12 A14 A16 S3 0.00 1.10E-03 -8.71E-06 4.38E-07 -1.11E-08 1.74E-10 0.00E+00 0.00E+00 S4 -1.34 -1.30E-03 1.84E-04 -4.08E-06 1.19E-07 -7.01E-09 0.00E+00 0.00E+00 S5 -1.03 -3.76E-04 3.01E-04 -1.96E-05 2.18E-06 -1.41E-07 0.00E+00 0.00E+00 S6 1.62 5.14E-03 8.98E-04 -6.45E-05 4.14E-05 -4.88E-06 0.00E+00 0.00E+00 S7 -3.55 1.41E-04 4.09E-05 -1.29E-05 -2.04E-06 5.00E-07 0.00E+00 0.00E+00 S8 0.30 5.41E-04 -1.60E-04 6.23E-05 -1.34E-05 1.21E-06 0.00E+00 0.00E+00 S16 0.00 -2.48E-03 1.84E-04 1.02E-05 -1.07E-06 3.21E-08 0.00E+00 0.00E+00 S17 0.00 -4.06E-03 4.28E-04 -2.10E-05 3.23E-07 2.09E-08 0.00E+00 0.00E+00 S18 -10.25 1.21E-02 -5.86E-04 1.51E-05 -1.62E-07 2.54E-09 0.00E+00 0.00E+00 S19 -2.54 9.46E-03 2.81E-04 -5.01E-05 1.97E-06 -1.80E-08 0.00E+00 0.00E+00 S20 0.07 -8.11E-03 2.39E-04 1.08E-05 -2.60E-06 9.62E-08 0.00E+00 0.00E+00 S21 1.02 -9.07E-03 6.06E-04 -3.21E-05 7.19E-07 -3.19E-09 0.00E+00 0.00E+00

[0107] When the spatial frequency of the optical lens of Embodiment 2 is 250 lp / mm, the MTF values within the entire field of view are all above 0.2, and the MTF value of the central field of view is above 0.46, indicating that the optical lens has good imaging quality and good detail resolution ability; and the absolute value of its optical distortion |DIS| ≤ |-2.94%|, indicating that the optical lens has low distortion characteristics.

[0108] Embodiment 3

[0109] Figure 3 Fig. shows a schematic structural diagram of the optical lens of Embodiment 3 of the present application.

[0110] As Figure 3 shown, compared with Embodiment 1, the main differences in Embodiment 3 of the present application are as follows: the object side S13 of the seventh lens L7 is a concave surface; the image side S15 of the eighth lens L8 is a convex surface; the image side S17 of the ninth lens L9 is a convex surface; and the optical parameters such as the radius of curvature of each lens surface, the lens thickness, and the distance between lenses are different.

[0111] Table 5 shows the basic parameter table of the optical lens in Embodiment 3, where the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0112] Table 5

[0113]

[0114] In Embodiment 3, the object sides and image sides of the second lens, the third lens, the fourth lens, the ninth lens, the tenth lens, and the eleventh lens are all aspherical surfaces, and the surface profiles of each aspherical lens can be defined by, but are not limited to, the formula (1) given in Embodiment 1 above. Table 6 below gives the conic coefficients k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each aspherical mirror surface in Embodiment 3.

[0115] Table 6

[0116]

[0117]

[0118] For the optical lens in Embodiment 3, when the spatial frequency is 250 lp / mm, the MTF values within the entire field of view are all above 0.27, and the MTF value in the central field of view is above 0.53, indicating that the optical lens has good imaging quality and good detail resolution ability; and the absolute value of its optical distortion |DIS| ≤ |-2.83%|, indicating that the optical lens has low distortion characteristics.

[0119] Embodiment 4

[0120] Figure 4 shows a schematic structural diagram of the optical lens in Embodiment 4 of the present application.

[0121] As Figure 4 shown, compared with Embodiment 1, the main differences in Embodiment 4 of the present application are as follows: the object side S13 of the seventh lens L7 is a concave surface; the image side S17 of the ninth lens L9 is a convex surface; and the optical parameters such as the radius of curvature of each lens surface, the lens thickness, and the distance between lenses are different.

[0122] Table 7 shows the basic parameter table of the optical lens in Embodiment 4, where the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0123] Table 7

[0124]

[0125]

[0126] In Embodiment 4, the object side and the image side of the second lens, the third lens, the fourth lens, the ninth lens, the tenth lens, and the eleventh lens are both aspherical surfaces. The surface profiles of the respective aspherical lenses can be defined by, but are not limited to, the formula (1) given in Embodiment 1 above. Table 8 below gives the conic coefficient k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for the respective aspherical surfaces in Embodiment 4.

[0127] Table 8

[0128] Face number k A4 A6 A8 A10 A12 A14 A16 S3 0.00 1.85E-03 -4.20E-05 1.03E-06 3.76E-09 -4.69E-10 8.54E-12 0.00E+00 S4 -0.52 5.20E-04 2.17E-04 5.80E-07 -1.60E-06 2.44E-07 -1.52E-08 0.00E+00 S5 0.82 9.42E-04 5.66E-04 -5.39E-05 5.27E-06 -2.97E-07 -1.35E-08 5.62E-11 S6 2.32 7.83E-03 7.83E-04 6.23E-05 -5.56E-06 -3.88E-06 6.76E-07 -1.05E-07 S7 -1.45 -6.80E-04 6.02E-05 -9.86E-05 -2.45E-06 3.21E-06 2.34E-07 -8.69E-08 S8 -2.51 6.67E-04 -1.08E-03 1.03E-03 -3.95E-04 7.57E-05 -3.55E-06 -3.20E-07 S16 0.00 -3.89E-03 -1.00E-04 4.98E-05 -5.35E-06 4.75E-07 -1.84E-08 -3.86E-11 S17 0.00 -2.62E-03 2.17E-04 -3.92E-05 3.31E-06 -1.78E-09 -8.99E-09 2.40E-10 S18 -0.39 1.83E-02 -9.23E-04 2.85E-05 2.88E-08 -7.12E-09 -2.81E-09 1.00E-10 S19 -0.85 7.98E-03 6.11E-04 -5.66E-05 1.79E-06 9.71E-10 -2.48E-09 6.34E-11 S20 -0.15 -1.15E-02 3.35E-04 2.08E-05 -3.15E-06 1.08E-07 4.11E-09 -2.88E-10 S21 -0.29 -1.39E-02 7.59E-04 -2.76E-05 1.66E-07 2.10E-08 -2.61E-10 -2.33E-11

[0129] For the optical lens of this Embodiment 4, when the spatial frequency is 250 lp / mm, the MTF values within the entire field of view are all above 0.25, and the MTF value of the central field of view is above 0.49, indicating that the optical lens has good imaging quality and good detail resolution ability; and the absolute value of its optical distortion |DIS| ≤ |-2.95%|, indicating that this optical lens has the characteristic of low distortion.

[0130] Embodiment 5

[0131] Figure 5 The structural schematic diagram of the optical lens of Embodiment 5 of the present application is shown.

[0132] As Figure 5 shown, compared with Embodiment 1, the main differences in Embodiment 5 of the present application are: the fourth lens L4 has a negative optical power; the image side S15 of the eighth lens L8 is a convex surface; the image side S17 of the ninth lens L9 is a convex surface; and the optical parameters such as the curvature radius of each lens surface, the lens thickness, and the distance between lenses are different.

[0133] Table 9 shows the basic parameter table of the optical lens of Embodiment 5, where the units of the curvature radius and the thickness / distance are both millimeters (mm).

[0134] Table 9

[0135]

[0136]

[0137] In Embodiment 5, the object side and the image side of the second lens, the third lens, the fourth lens, the ninth lens, the tenth lens, and the eleventh lens are both aspherical surfaces. The surface profiles of the aspherical lenses can be defined by, but not limited to, the formula (1) given in Embodiment 1 above. Table 10 below gives the conic coefficients k and the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for the aspherical surfaces in Embodiment 5.

[0138] Table 10

[0139] Face number k A4 A6 A8 A10 A12 A14 A16 S3 0.00 1.14E-03 -2.44E-05 6.60E-07 -1.32E-08 1.72E-10 -8.48E-13 0.00E+00 S4 -0.88 9.08E-04 3.01E-05 4.82E-06 -5.80E-07 2.95E-08 -6.99E-10 0.00E+00 S5 0.79 1.44E-03 2.33E-04 -2.59E-05 2.39E-06 -8.09E-08 -8.25E-09 -3.07E-10 S6 0.95 7.23E-03 6.62E-04 -3.28E-05 2.39E-05 -4.82E-06 9.51E-07 -1.38E-07 S7 -4.65 -2.95E-04 -2.89E-04 1.31E-04 -3.74E-05 3.73E-06 2.09E-07 -5.06E-08 S8 -1.32 5.12E-04 -1.45E-03 9.66E-04 -3.06E-04 2.85E-05 5.80E-06 -1.04E-06 S16 0.00 -2.08E-03 -3.12E-04 6.35E-05 -5.23E-06 1.35E-07 8.69E-09 -6.50E-10 S17 0.00 -9.97E-04 1.92E-04 -2.92E-05 2.14E-06 -2.50E-08 -6.71E-09 2.34E-10 S18 -0.38 1.59E-02 -6.76E-04 2.01E-05 -2.80E-07 3.57E-09 -5.73E-10 -6.34E-13 S19 -0.61 8.04E-03 3.32E-04 -3.64E-05 1.77E-06 -1.24E-08 -3.30E-09 8.39E-11 S20 0.33 -1.11E-02 2.09E-04 2.86E-05 -2.56E-06 4.66E-08 1.84E-09 -8.91E-11 S21 -0.54 -1.34E-02 6.90E-04 -1.74E-05 -2.20E-07 1.22E-08 1.55E-10 -1.22E-11

[0140] For the optical lens of Embodiment 5, when the spatial frequency is 250 lp / mm, the MTF values within the entire field of view are all above 0.27, and the MTF value of the central field of view is above 0.54, indicating that the optical lens has good imaging quality and good detail resolution ability; and the absolute value of its optical distortion |DIS| ≤ |-2.93%|, indicating that the optical lens has low distortion characteristics.

[0141] Embodiment 6

[0142] Figure 6 The structural schematic diagram of the optical lens of Embodiment 6 of the present application is shown. As Figure 6 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, and an eleventh lens L11 along the optical axis from the object side to the image side.

[0143] The first lens L1 has a negative optical power. Its object side S1 is a convex surface, and its image side S2 is a concave surface.

[0144] The second lens L2 has a negative optical power. Its object side S3 is a convex surface, and its image side S4 is a concave surface.

[0145] The third lens L3 has a positive optical power. Its object side S5 is a convex surface, and its image side S6 is a concave surface.

[0146] The fourth lens L4 has a positive optical power. Its object side S7 is a concave surface, and its image side S8 is a convex surface.

[0147] The fifth lens L5 has a negative optical power. Its object side S10 is a concave surface, and its image side S11 is a concave surface.

[0148] The sixth lens L6 has a positive optical power. Its object side S11 is a convex surface, and its image side S12 is a convex surface.

[0149] The seventh lens L7 has a positive optical power. Its object side S13 is a convex surface, and its image side S14 is a convex surface.

[0150] The eighth lens L8 has a negative focal power, its object side S15 is concave, and its image side S16 is concave.

[0151] The ninth lens L9 has a positive focal power, its object side S17 is convex, and its image side S18 is convex.

[0152] The tenth lens L10 has a positive focal power, its object side S19 is concave, and its image side S20 is convex.

[0153] The eleventh lens L11 has a positive focal power, its object side S21 is convex, and its image side S22 is concave.

[0154] Among them, the fifth lens L5 and the sixth lens L6 form a doublet lens.

[0155] The optical lens further includes a stop STO, and the stop STO can be disposed between the fourth lens L4 and the fifth lens L5.

[0156] The optical lens may further include a filter (not shown) having an object side and an image side and / or a protective glass CG having an object side S23 and an image side S24. The filter can be used to correct color deviation, and the protective glass CG can be used to protect the image sensing chip located at the imaging surface. The light from the object sequentially passes through the surfaces S1 to S24 and finally forms an image on the imaging surface IMG. It should be noted that the surfaces S1 to S24 are not shown in Figure 6 it.

[0157] Table 11 shows the basic parameter table of the optical lens of Embodiment 6, where the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0158] Table 11

[0159]

[0160]

[0161] In Embodiment 6, the object sides and the image sides of the second lens, the third lens, the fourth lens, the ninth lens, the tenth lens, and the eleventh lens are all aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by, but not limited to, the formula (1) given in Embodiment 1 above. Table 12 below gives the conic coefficients k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for the aspherical surfaces in Embodiment 6.

[0162] Table 12

[0163] Face number k A4 A6 A8 A10 A12 A14 A16 S3 0.00 1.19E-03 -2.42E-05 6.33E-07 -1.30E-08 1.80E-10 -9.71E-13 0.00E+00 S4 -0.87 8.40E-04 4.31E-05 4.19E-06 -5.77E-07 2.96E-08 -6.79E-10 0.00E+00 S5 0.36 6.09E-04 2.24E-04 -2.23E-05 1.89E-06 -3.39E-08 -6.01E-09 -5.49E-10 S6 -0.76 5.94E-03 6.65E-04 -4.73E-05 2.37E-05 -4.62E-06 9.51E-07 -1.38E-07 S7 -1.81 -1.19E-03 -2.51E-04 1.18E-04 -3.91E-05 3.73E-06 2.09E-07 -5.06E-08 S8 1.77 3.60E-04 -1.40E-03 9.56E-04 -3.06E-04 2.84E-05 5.80E-06 -1.04E-06 S17 0.00 -3.87E-03 -5.83E-04 6.98E-05 -5.44E-06 3.03E-07 4.88E-09 -1.03E-09 S18 0.00 -4.20E-04 1.48E-04 -3.61E-05 3.34E-06 -2.12E-08 -8.93E-09 2.80E-10 S19 -0.76 1.68E-02 -6.77E-04 1.59E-05 -5.01E-07 2.20E-08 3.44E-10 -7.14E-11 S20 -0.53 8.85E-03 2.35E-04 -3.71E-05 2.12E-06 -1.26E-08 -4.23E-09 1.03E-10 S21 0.04 -1.15E-02 1.40E-04 3.87E-05 -2.93E-06 4.35E-08 2.56E-09 -9.55E-11 S22 -0.59 -1.49E-02 7.67E-04 -2.16E-05 -1.07E-07 1.19E-08 2.07E-10 -1.59E-11

[0164] When the spatial frequency of the optical lens of this Embodiment 6 is 250 lp / mm, the MTF values within the entire field of view are all above 0.24, and the MTF value of the central field of view is above 0.53, indicating that the optical lens has good imaging quality and good detail resolution ability; and the absolute value of its optical distortion |DIS| ≤ |-2.93%|, indicating that this optical lens has low distortion characteristics.

[0165] Embodiment 7

[0166] Figure 7 The structural schematic diagram of the optical lens of Embodiment 7 of this application is shown.

[0167] As Figure 7 shown, compared with Embodiment 1 of this application, the main differences in Embodiment 7 are: the fourth lens L4 has a negative optical power; the fifth lens L5 has a positive optical power, its object side S10 is a convex surface, and its image side S11 is a convex surface; the sixth lens L6 has a negative optical power, its object side S11 is a concave surface; the image side S15 of the eighth lens L8 is a convex surface; the image side S17 of the ninth lens L9 is a convex surface; the optical parameters such as the radius of curvature of each lens surface, the lens thickness, and the distance between lenses are different.

[0168] Table 13 shows the basic parameter table of the optical lens of Embodiment 7, where the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0169] Table 13

[0170]

[0171] In Embodiment 7, the object sides and image sides of the second lens, the third lens, the fourth lens, the ninth lens, the tenth lens, and the eleventh lens are all aspherical surfaces, and the surface profiles of each aspherical lens can be defined by, but are not limited to, the formula (1) given in Embodiment 1 above. Table 14 below gives the conic coefficient k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each aspherical mirror surface in Embodiment 7.

[0172] Table 14

[0173] Face number k A4 A6 A8 A10 A12 A14 A16 S3 0.00 1.02E-03 -1.94E-05 6.24E-07 -1.36E-08 1.81E-10 -8.38E-13 0.00E+00 S4 -0.81 4.04E-04 3.36E-05 4.76E-06 -5.18E-07 3.14E-08 -8.87E-10 0.00E+00 S5 0.34 8.79E-04 1.78E-04 -1.59E-05 1.39E-06 -1.47E-09 -1.13E-08 -3.77E-10 S6 0.18 6.52E-03 4.92E-04 9.65E-06 1.82E-05 -4.82E-06 9.51E-07 -1.38E-07 S7 -4.83 -1.19E-03 -1.82E-04 1.33E-04 -3.63E-05 3.73E-06 2.09E-07 -5.06E-08 S8 -8.04 -5.15E-04 -1.34E-03 9.59E-04 -3.06E-04 2.85E-05 5.80E-06 -1.04E-06 S16 0.00 -2.84E-03 -3.12E-04 6.00E-05 -3.87E-06 -3.10E-08 1.21E-08 -1.67E-10 S17 0.00 -5.61E-04 1.69E-04 -2.87E-05 2.24E-06 -9.03E-08 -3.01E-09 3.06E-10 S18 -0.11 1.49E-02 -6.28E-04 1.88E-05 -5.04E-07 1.29E-08 -1.55E-10 -2.31E-11 S19 -0.53 7.88E-03 2.54E-04 -3.38E-05 1.94E-06 -1.93E-08 -4.13E-09 1.25E-10 S20 -0.01 -1.01E-02 1.94E-04 2.69E-05 -2.72E-06 5.89E-08 2.75E-09 -1.24E-10 S21 -0.63 -1.33E-02 7.29E-04 -2.22E-05 -1.02E-07 1.53E-08 5.00E-11 -1.17E-11

[0174] When the spatial frequency of the optical lens of this Embodiment 7 is 250 lp / mm, the MTF values within the entire field of view are all above 0.25, and the MTF value of the central field of view is above 0.53, indicating that the optical lens has good imaging quality and good detail resolution ability; and the absolute value of its optical distortion |DIS| ≤ |-2.91%|, indicating that this optical lens has low distortion characteristics.

[0175] Embodiment 8

[0176] Figure 8 Fig. 1 shows a schematic structural diagram of the optical lens according to Embodiment 8 of the present application.

[0177] As Figure 8 shown, compared with Embodiment 1, the main differences of Embodiment 8 of the present application are as follows: the image side surface S17 of the ninth lens L9 is a convex surface; the optical parameters such as the curvature radius of each lens surface, the lens thickness, and the distance between lenses are different.

[0178] Table 15 shows the basic parameter table of the optical lens of Embodiment 8, where the units of the curvature radius and the thickness / distance are both millimeters (mm).

[0179] Table 15

[0180]

[0181]

[0182] In Embodiment 8, the object side and the image side of the second lens, the third lens, the fourth lens, the ninth lens, the tenth lens, and the eleventh lens are both aspherical surfaces. The surface profiles of the aspherical lenses can be defined by, but not limited to, the formula (1) given in Embodiment 1 above. Table 16 below gives the conic coefficients k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each aspherical mirror surface in Embodiment 8.

[0183] Table 16

[0184] Face number k A4 A6 A8 A10 A12 A14 A16 S3 0.00 1.02E-03 -1.93E-05 5.97E-07 -1.37E-08 1.87E-10 -8.81E-13 0.00E+00 S4 -0.46 -1.27E-04 3.65E-05 4.99E-06 -5.40E-07 2.89E-08 -9.38E-10 0.00E+00 S5 0.25 9.04E-04 2.77E-04 -2.93E-05 2.95E-06 -9.07E-08 -1.26E-08 -3.07E-10 S6 -0.07 6.57E-03 7.06E-04 -1.54E-05 2.30E-05 -4.82E-06 9.51E-07 -1.38E-07 S7 -1.61 -4.50E-04 -1.86E-04 1.11E-04 -3.51E-05 3.73E-06 2.09E-07 -5.06E-08 S8 -0.45 2.33E-04 -1.46E-03 9.62E-04 -3.08E-04 2.85E-05 5.80E-06 -1.04E-06 S16 0.00 -1.41E-03 -2.07E-04 6.26E-05 -5.81E-06 1.13E-07 1.37E-08 -6.50E-10 S17 0.00 6.57E-04 2.77E-04 -3.57E-05 2.16E-06 -2.74E-08 -6.51E-09 3.18E-10 S18 -0.12 1.49E-02 -6.39E-04 2.01E-05 -3.86E-07 4.44E-09 7.62E-11 -2.37E-11 S19 -0.34 7.29E-03 3.07E-04 -3.22E-05 1.80E-06 -1.69E-08 -3.75E-09 1.07E-10 S20 0.66 -1.19E-02 2.81E-04 2.40E-05 -2.65E-06 5.34E-08 1.96E-09 -1.10E-10 S21 -0.73 -1.37E-02 6.94E-04 -1.89E-05 -8.86E-08 9.73E-09 -2.56E-12 -6.27E-12

[0185] For the optical lens of Embodiment 8, when the spatial frequency is 250 lp / mm, the MTF values within the entire field of view are all above 0.27, and the MTF value of the central field of view is above 0.53, indicating that the optical lens has good imaging quality and good detail resolution ability; and the absolute value of its optical distortion |DIS| ≤ |-2.86%|, indicating that the optical lens has the characteristic of low distortion.

[0186] In summary, the optical lenses in Embodiments 1 to 8 respectively satisfy the relationships shown in Table 17. Among them, in Table 17, the parameters Vd5, Vd6, Nd7, Nd8, Vd7, Vd8, and FNO have no unit, the unit of FOV is degree (°), and the units of the remaining parameters are millimeters (mm).

[0187] Table 17

[0188] Conditional expression / Embodiment 1 2 3 4 5 6 7 8 f 3.65 3.61 3.59 3.62 3.55 3.56 3.54 3.56 FNO 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 FOV 103.31 103.94 104.11 103.64 104.82 104.68 104.86 104.50 f12 / f -2.659 -2.688 -2.540 -2.350 -2.608 -2.629 -2.654 -2.422 f2 / f -1.585 -1.642 -1.820 -1.437 -1.971 -2.000 -1.992 -1.900 (R21 + R22) / (R21 - R22) 1.497 1.278 1.228 1.273 1.232 1.181 1.236 1.216 D31 / R31 0.891 1.415 0.940 0.893 0.952 1.166 1.094 1.066 R41 / R42 1.161 1.094 1.202 0.981 0.715 1.183 0.649 1.012 f5 / f -2.975 -2.280 -2.812 -2.488 -2.459 -2.271 1.087 -3.127 f6 / f 1.313 1.141 1.065 0.956 1.116 1.665 -2.472 1.305 f5 / f6 -2.267 -1.997 -2.642 -2.603 -2.204 -1.364 -0.440 -2.396 f7 / f 1.774 1.579 2.499 1.633 1.789 2.310 1.696 2.087 f8 / f -1.042 -1.171 -1.441 -0.934 -1.371 -2.351 -1.299 -1.422 f7 / f8 -1.702 -1.349 -1.735 -1.749 -1.305 -0.983 -1.306 -1.468 fB / f 2.107 2.641 2.688 2.202 2.987 2.503 2.458 2.574 fa / fb -2.108 -1.555 -1.858 -1.745 -1.342 -2.793 -1.159 -1.859 |Vd5 - Vd6| 3.190 19.550 9.040 9.660 11.140 19.650 22.730 18.060 |Nd8 - Nd7| 0.287 0.350 0.371 0.288 0.350 0.509 0.350 0.311 |Vd7 - Vd8| 55.890 57.800 72.400 55.890 57.830 77.120 57.830 58.910 TTL / F 7.542 7.628 7.660 6.906 7.753 7.733 7.762 7.718 FOV / (H * f) 3.162 3.218 3.237 3.195 3.298 3.285 3.303 3.273

[0189] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

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

2. 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 concave; The object side surface of the fourth lens is concave, and the image side surface is convex; The object side surface of the fifth lens is convex, flat or concave, and the image side surface is convex or concave; The object side surface of the sixth lens is convex or concave, and the image side surface is convex; The object side surface of the seventh lens is convex or concave, and the image side surface is convex; The object side surface of the eighth lens is a concave surface, and the image side surface is a convex surface or a concave surface; The object side surface of the ninth lens is a convex surface, and the image side surface is a convex surface or a concave surface; The object side surface of the tenth lens is concave, and the image side surface is convex.

3. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: -2.95≤f12 / f≤-2.11, -2.2≤f2 / f≤-1.3, 1.06≤(R21+R22) / (R21-R22)≤1.65, Among them, f12 is the combined effective focal length of the first lens and the second lens, f2 is the effective focal length of the second lens, f is the total effective focal length of the optical lens, R21 is the curvature radius of the object side of the second lens, and R22 is the curvature radius of the image side of the second lens.

4. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: 0.80≤D31 / R31≤1.56, 0.58≤R41 / R42≤1.32, Among them, D31 is the maximum optical aperture of the object side of the third lens, R31 is the curvature radius of the object side of the third lens, R41 is the curvature radius of the object side of the fourth lens, and R42 is the curvature radius of the image side of the fourth lens.

5. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: -3.44≤f5 / f≤1.19, -2.72≤f6 / f≤1.83, -2.90≤f5 / f6≤-0.40, Among them, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, and f is the total effective focal length of the optical lens.

6. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: 1.42≤f7 / f≤2.75, -2.58≤f8 / f≤-0.84, -1.92≤f7 / f8≤-0.88, Among them, f7 is the effective focal length of the seventh lens, f8 is the effective focal length of the eighth lens, and f is the total effective focal length of the optical lens.

7. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: 1.90≤fB / f≤3.28,-3.07≤fa / fb≤-1.04, Wherein, fB is the combined effective focal length of the ninth lens to the eleventh lens, fa is the combined effective focal length of the first lens to the fourth lens, fb is the combined effective focal length of the fifth lens to the eleventh lens, and f is the total effective focal length of the optical lens.

8. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: 2.87≤|Vd5-Vd6|≤25, 0.26≤|Nd8-Nd7|≤0.56, 50.30≤|Vd7-Vd8|≤84.83, Among them, Vd5 is the Abbe number of the fifth lens, Vd6 is the Abbe number of the sixth lens, Nd8 is the refractive index of the eighth lens, Nd7 is the refractive index of the seventh lens, Vd7 is the Abbe number of the seventh lens, and Vd8 is the Abbe number of the eighth lens.

9. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: 6.22≤TTL / f≤8.53,2.85° / mm 2 ≤FOV / (H*f)≤3.63° / mm 2 , Wherein, TTL is the total optical length of the optical lens, f is the total effective focal length of the optical lens, FOV is the full field of view of the optical lens, and H is the full image height of the optical lens.

10. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: -2.69≤f12 / f≤-2.35,-2.00≤f2 / f≤-1.43,1.18≤(R21+R22) / (R21-R22)≤1.50,0.89≤D31 / R31≤1.42,0.64≤R41 / R42≤1.21,-3.17≤f5 / f≤1.09,-2.48≤f6 / f≤1.67,-2.65≤f5 / f6≤-0.44,1.57≤f7 / f≤2.50,-2.36≤f8 / f≤-0.93,-1.75≤f7 / f8≤-0.98,2.10≤fB / f≤2.99,-2.80≤fa / fb≤-1.15,3.19≤|Vd5-Vd6|≤22.73,0.28≤|Nd8-Nd7|≤0.51,55.89≤|Vd7-Vd8|≤77.12,6.90≤TTL / f≤7.77,3.16° / mm 2 ≤FOV / (H*f)≤3.31° / mm 2 , Wherein, f12 is the combined effective focal length of the first lens and the second lens, f2 is the effective focal length of the second lens, f is the total effective focal length of the optical lens, R21 is the radius of curvature of the object side of the second lens, R22 is the radius of curvature of the image side of the second lens, D31 is the maximum optical aperture of the object side of the third lens, R31 is the radius of curvature of the object side of the third lens, R41 is the radius of curvature of the object side of the fourth lens, R42 is the radius of curvature of the image side of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f8 is the effective focal length of the fifth lens. is the effective focal length of the eighth lens, fB is the combined effective focal length of the ninth lens to the eleventh lens, fa is the combined effective focal length of the first lens to the fourth lens, fb is the combined effective focal length of the fifth lens to the eleventh lens, Vd5 is the Abbe number of the fifth lens, Vd6 is the Abbe number of the sixth lens, Nd8 is the refractive index of the eighth lens, Nd7 is the refractive index of the seventh lens, Vd7 is the Abbe number of the seventh lens, Vd8 is the Abbe number of the eighth lens, TTL is the total optical length of the optical lens, FOV is the full field of view of the optical lens, and H is the full image height of the optical lens.

Images