Optical lens

Abstract

The present application discloses an optical lens, comprising a lens barrel, a lens group accommodated in the lens barrel and a plurality of spacing elements, wherein the lens group comprises a first lens to a sixth lens arranged in sequence from an object side to an image side along an optical axis; the plurality of spacing elements comprise a second spacing element located between the second lens and the third lens and abutting against the image side surface of the second lens, and a third spacing element located between the third lens and the fourth lens and abutting against the image side surface of the third lens. The relationship between the outer diameters D3m and D2m of the image side surfaces of the third spacing element and the second spacing element and the on-axis distance TD from the object side surface of the first lens to the image side surface of the sixth lens satisfies (D3m-D2m) / TD < 0.4; the relationship between the curvature radii R5 and R4 of the object side surface of the third lens and the image side surface of the second lens satisfies 1.3 < (R5+R4) / (R5-R4) < 1.7; the relationship between the effective focal length f2 of the second lens satisfies -1.9 < f2 / (D3m+D2m) < -1.2; the relationship among the inner diameters d3m and d2m of the image side surfaces of the third spacing element and the second spacing element, the dispersion coefficient V2 of the second lens and the on-axis spacing T23 between the second lens and the third lens satisfies 22 < (d3m-d2m)×V2 / T23 < 29.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to an optical lens. Background Technology

[0002] With the rapid development of the smartphone industry, people have increasingly stringent requirements for the image quality of mobile phone lenses, especially for the main camera of high-end flagship models. Mobile phone imaging lenses are trending towards larger image sensors, wider angles, and ultra-thin designs, which poses greater challenges to optical system design. At the same time, with the advancement of image sensor technologies such as CCD and CMOS in modules, the number of pixels on the chip has increased while the size of each pixel has decreased, placing increasingly higher demands on optical systems to meet high imaging performance requirements.

[0003] For a six-element rear main camera lens assembly that meets the requirements of a large image sensor and wide angle, stray light from the edges of the first, second, and third lenses is prone to occur. Restrictions on the radial shape and size of the lenses can lead to a decrease in lens sensitivity, which is detrimental to field curvature adjustment, and the image quality of the lens needs further improvement. Therefore, it is hoped that by rationally arranging the lenses and appropriately placing spacing elements between them, the above-mentioned technical problems can be solved, and the image quality of the lens can be improved. Summary of the Invention

[0004] The present application provides an optical lens, which may include a lens barrel, a lens group accommodated in the lens barrel, and a plurality of spacing elements. The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in order from the object side to the image side along the optical axis. The plurality of spacing elements comprise: a second spacing element located between the second lens and the third lens and abutting against the image side surface of the second lens; and a third spacing element located between the third lens and the fourth lens and abutting against the image side surface of the third lens. The outer diameter D3m of the image side surface of the third spacing element, the outer diameter D2m of the image side surface of the second spacing element, and the distance TD on the optical axis from the object side surface of the first lens to the image side surface of the sixth lens can satisfy: (D3m-D2m) / TD<0.4; the curvature radius R5 of the object side surface of the third lens and the curvature radius R4 of the image side surface of the second lens can satisfy: 1.3<(R5+R4) / (R5-R4)<1.7; the effective focal length f2 of the second lens, the outer diameter D3m of the image side surface of the third spacing element, and the outer diameter D2m of the image side surface of the second spacing element can satisfy: -1.9<f2 / (D3m+D2m)<-1.2; and the inner diameter d3m of the image side surface of the third spacing element, the inner diameter d2m of the image side surface of the second spacing element, the dispersion coefficient V2 of the second lens, and the distance T23 on the optical axis from the image side surface of the second lens to the object side surface of the third lens can satisfy: 22<(d3m-d2m)×V2 / T23<29.

[0005] In one embodiment, the plurality of spacing elements may further comprise: a first spacing element located between the first lens and the second lens and abutting against the image side surface of the first lens; the distance EP12 on the optical axis from the image side surface of the first spacing element to the object side surface of the second spacing element and the distance T12 on the optical axis from the image side surface of the first lens to the object side surface of the second lens can satisfy: 2.5<EP12 / T12<3.5.

[0006] In one embodiment, the plurality of spacing elements may further comprise: a fourth spacing element located between the fourth lens and the fifth lens and abutting against the image side surface of the fourth lens; and a fifth spacing element located between the fifth lens and the sixth lens and abutting against the image side surface of the fifth lens; the maximum thickness CP5 of the fifth spacing element along the optical axis direction, the distance EP45 on the optical axis from the image side surface of the fourth spacing element to the object side surface of the fifth spacing element, and the center thickness CT4 of the fourth lens on the optical axis can satisfy: 1.2<(CP5+EP45) / CT4<4.

[0007] In one embodiment, the plurality of spacers may further include: a fifth spacer, located between the fifth lens and the sixth lens, and abutting against the image side of the fifth lens; the inner diameter d5m of the image side of the fifth spacer, the inner diameter d5s of the object side of the fifth spacer, and the effective focal length f5 of the fifth lens may satisfy: 1.6 < (d5m + d5s) / f5 < 2.

[0008] In one embodiment, the plurality of spacers may further include: a fourth spacer, located between the fourth lens and the fifth lens, and abutting against the image-side surface of the fourth lens; the distance EP34 from the image-side surface of the third spacer to the object-side surface of the fourth spacer on the optical axis and the effective focal length f4 of the fourth lens and the effective focal length f3 of the third lens may satisfy: 0.01 <EP34 / (f4+f3)<0.03。

[0009] In one embodiment, the maximum thickness CP2 of the second spacer element along the optical axis, the distance T34 from the image-side surface of the third lens to the object-side surface of the fourth lens along the optical axis, and the maximum thickness CP3 of the third spacer element along the optical axis can satisfy: 31.5 <T23 / CP2+T34 / CP3<34.6。

[0010] In one embodiment, the plurality of spacer elements may further include: a fourth spacer element located between the fourth lens and the fifth lens, and abutting against the image-side surface of the fourth lens; the center thickness CT4 of the fourth lens on the optical axis, the refractive index N4 of the fourth lens, and the maximum thickness CP4 of the fourth spacer element along the optical axis direction may satisfy: 15.5. <CT4×N4 / CP4<30.5。

[0011] In one embodiment, the plurality of spacers may further include: a fifth spacer, located between the fifth lens and the sixth lens, and abutting against the image-side surface of the fifth lens; the outer diameter D5m of the image-side surface of the fifth spacer, the inner diameter d5m of the image-side surface of the fifth spacer, and the distance T45 from the image-side surface of the fourth lens to the object-side surface of the fifth lens on the optical axis may satisfy: 1.2 < (D5m - d5m) / T45 < 4.5.

[0012] In one embodiment, the curvature radius R10 of the image side surface of the fifth lens and the curvature radius R9 of the object side surface of the fifth lens may satisfy: 4.8<(R10-R9) / (R10+R9)<5.1; and the plurality of spacing elements may further comprise: a fifth spacing element located between the fifth lens and the sixth lens and abutting against the image side surface of the fifth lens; the outer diameter D5m of the image side surface of the fifth spacing element and the inner diameter d5m of the image side surface of the fifth spacing element may satisfy: 1<D5m / d5m<1.5.

[0013] In one embodiment, the plurality of spacing elements may further comprise: a fourth spacing element located between the fourth lens and the fifth lens and abutting against the image side surface of the fourth lens; and a fifth spacing element located between the fifth lens and the sixth lens and abutting against the image side surface of the fifth lens; the combined focal length f45 of the fourth lens and the fifth lens and the distance EP45 on the optical axis from the image side surface of the fourth spacing element to the object side surface of the fifth spacing element may satisfy: 11.0<f45 / EP45<23.0; and the maximum thickness CP5 of the fifth spacing element along the optical axis direction and the maximum thickness CP4 of the fourth spacing element along the optical axis direction may satisfy: 0.8<CP5 / CP4<22.2.

[0014] In one embodiment, the plurality of spacing elements may further comprise: a sixth spacing element located on the image side of the sixth lens and abutting against the image side surface of the sixth lens; the inner diameter d6m of the image side surface of the sixth spacing element, the inner diameter d6s of the object side surface of the sixth spacing element and the effective focal length f6 of the sixth lens may satisfy: |(d6m-d6s) / f6|<0.1.

[0015] In one embodiment, the plurality of spacing elements may further comprise: a fifth spacing element located between the fifth lens and the sixth lens and abutting against the image side surface of the fifth lens; and a fifth auxiliary spacing element located between the fifth spacing element and the sixth lens.

[0016] The optical lens provided by the present application comprises a lens barrel, a six-piece imaging lens group arranged in the lens barrel and a plurality of spacing elements. The first to sixth lenses are arranged sequentially from the object side to the image side along the optical axis, wherein a second spacing element abutting against the image side surface of the second lens is arranged between the second lens and the third lens, and a third spacing element abutting against the image side surface of the third lens is arranged between the third lens and the fourth lens. By controlling that the outer diameters D2m and D3m of the image side surfaces of the second spacing element and the third spacing element, the on-axis distance TD from the object side surface of the first lens to the image side surface of the sixth lens, and the effective focal length f2 of the second lens respectively satisfy the conditional expressions (D3m-D2m) / TD < 0.4 and -1.9 < f2 / (D3m+D2m) < -1.2, marginal light can be effectively blocked, and generation of stray light can be avoided. On the premise of satisfying the above two conditional expressions, in order to ameliorate the problem of lens sensitivity degradation caused by the restrictions on the radial shape and size of the lens, the curvature radius R4 of the image side surface of the second lens and the curvature radius R5 of the object side surface of the third lens are controlled to satisfy the conditional expression 1.3 < (R5+R4) / (R5-R4) < 1.7, and the inner diameters d2m and d3m of the image side surfaces of the second spacing element and the third spacing element, the dispersion coefficient V2 of the second lens, and the on-axis spacing T23 between the second lens and the third lens are controlled to satisfy the conditional expression 22 < (d3m-d2m)×V2 / T23 < 29, which can correspondingly improve the sensitivity performance of the lens, facilitate the adjustment of field curvature, and help improve imaging quality.

[0017] In addition, the design scheme of the six-piece optical lens provided by the present application can satisfy the requirements of large image plane and large wide angle, and meanwhile, by reasonably controlling the positions of the fifth lens and the fourth spacing element located between the fourth lens and the fifth lens, the design is carried out with fewer degrees of freedom to reduce production cost and mitigate problems concerning lens reliability. The lens scheme provided by the present application integrates the requirements of processability of the lens structure and optical parameters, and can form an optical lens design scheme with a head diameter of, for example, φ6.6 mm and a maximum outer diameter of, for example, φ9.6 mm on the premise of satisfying stable lens assembly, which can well meet the application requirements of main cameras in next-generation high-end smart phones. Description of Drawings

[0018] Other features, objects and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments with reference to the accompanying drawings. In the drawings:

[0019] Figure 1 it shows a schematic diagram of the structure and partial parameters of the optical lens according to an exemplary embodiment of the present application;

[0020] Figure 2 it shows a data table of tangential field curvature sensitivity and sagittal field curvature sensitivity of each lens included in the optical lens according to an exemplary embodiment of the present application when the values of the relevant conditional expressions satisfy the range defined by the present application;

[0021] Figure 3 A data table showing the field curvature sensitivity in the T direction and the field curvature sensitivity in the S direction of an optical lens according to an exemplary embodiment of this application when the values ​​of the relevant conditional expressions are less than the range defined in this application;

[0022] Figure 4 A data table showing the field curvature sensitivity in the T direction and the field curvature sensitivity in the S direction of an optical lens according to an exemplary embodiment of this application when the values ​​of the relevant conditional expressions are greater than the range defined in this application;

[0023] Figure 5 , Figure 6 and Figure 7 Schematic diagrams of the optical lenses according to Embodiments 1, 2 and 3 of this application are shown respectively;

[0024] Figure 8 , Figure 9 and Figure 10 The on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the optical lenses of Embodiments 1, 2, and 3 are shown respectively.

[0025] Figure 11 , Figure 12 and Figure 13 Schematic diagrams of the optical lenses according to Embodiments 4, 5 and 6 of this application are shown respectively;

[0026] Figure 14 , Figure 15 and Figure 16 The on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the optical lenses of Examples 4, 5, and 6 are shown respectively.

[0027] Figure 17 , Figure 18 and Figure 19 Schematic diagrams of the optical lenses according to Embodiments 7, 8, and 9 of this application are shown respectively; and

[0028] Figure 20 , Figure 21 and Figure 22 The on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the optical lenses of Examples 7, 8, and 9 are shown respectively. Detailed Implementation

[0029] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

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

[0031] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0032] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to methods commonly used in the art, such as using the sign of the R value (R refers to the radius of curvature of the paraxial region) to determine concavity or convexity. In this paper, the surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens. For the object-side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the image-side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0033] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0034] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by a person of ordinary skill in the art to which the present application pertains. It should also be understood that terms (including terms defined in commonly used dictionaries) shall be interpreted to have meanings consistent with their meanings in the context of the related art, and shall not be interpreted in an idealized or overly formal sense, unless otherwise explicitly defined herein.

[0035] It should be noted that the embodiments and the features in the embodiments of the present application can be combined with each other without conflict. The following embodiments only illustrate several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Hereinafter, the present application will be described in detail with reference to the accompanying drawings and in combination with the embodiments.

[0036] The features, principles, and other aspects of the present application are described in detail below.

[0037] An optical lens according to an exemplary embodiment of the present application may include a lens barrel, a lens group accommodated in the lens barrel, and a plurality of spacing elements. The lens group may be a six-piece lens group, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially arranged along an optical axis from an object side to an image side.

[0038] In an exemplary embodiment, the plurality of spacing elements in the optical lens may include a second spacing element located between the second lens and the third lens and abutting against an image-side surface of the second lens, and a third spacing element located between the third lens and the fourth lens and abutting against an image-side surface of the third lens.

[0039] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional expressions (D3m-D2m) / TD<0.4, 1.3<(R5+R4) / (R5-R4)<1.7, -1.9<f2 / (D3m+D2m)<-1.2, and 22<(d3m-d2m)×V2 / T23<29, wherein D3m is an outer diameter of an image-side surface of the third spacing element, D2m is an outer diameter of an image-side surface of the second spacing element, TD is a distance on the optical axis from an object-side surface of the first lens to an image-side surface of the sixth lens, R5 is a curvature radius of an object-side surface of the third lens, R4 is a curvature radius of an image-side surface of the second lens, f2 is an effective focal length of the second lens, d3m is an inner diameter of the image-side surface of the third spacing element, d2m is an inner diameter of the image-side surface of the second spacing element, V2 is an Abbe number of the second lens, and T23 is a distance on the optical axis from the image-side surface of the second lens to the object-side surface of the third lens.

[0040] The optical lens according to the exemplary embodiment of the present application includes a lens barrel, a six-piece imaging lens group arranged in the lens barrel and a plurality of spacer elements. The first to sixth lenses are sequentially arranged along the optical axis from the object side to the image side, wherein a second spacer element abutting against the image side surface of the second lens is arranged between the second lens and the third lens, and a third spacer element abutting against the image side surface of the third lens is arranged between the third lens and the fourth lens. By controlling the outer diameters D2m and D3m of the image side surfaces of the second spacer element and the third spacer element, the on-axis distance TD from the object side surface of the first lens to the image side surface of the sixth lens, and the effective focal length f2 of the second lens to respectively satisfy the conditional expressions (D3m-D2m) / TD<0.4 and -1.9<f2 / (D3m+D2m)<-1.2, edge light can be effectively blocked and stray light generation can be avoided. On the premise of satisfying the above two conditional expressions, in order to improve the problem of reduced lens sensitivity caused by the limitation of the radial shape and size of the lens, controlling the curvature radius R4 of the image side surface of the second lens and the curvature radius R5 of the object side surface of the third lens to satisfy the conditional expression 1.3<(R5+R4) / (R5-R4)<1.7, and controlling the inner diameters d2m and d3m of the image side surfaces of the second spacer element and the third spacer element, the dispersion coefficient V2 of the second lens, and the on-axis spacing T23 between the second and third lenses to satisfy the conditional expression 22<(d3m-d2m)×V2 / T23<29, can correspondingly improve the sensitivity performance of the lens, facilitate the adjustment of field curvature, and help improve imaging quality.

[0041] Figure 2 shows a data table of field curvature sensitivity in the T direction (meridional direction) and S direction (sagittal direction) of each lens L1 to L6 (the first lens to the sixth lens) when the optical lens according to the exemplary embodiment of the present application satisfies the conditional expressions (R5+R4) / (R5-R4)=1.5 and (d3m-d2m)×V2 / T23=25, that is, R4 and R5 fall within the range defined by the above conditional expression 1.3<(R5+R4) / (R5-R4)<1.7, and d3m, d2m, V2 and T23 fall within the range defined by the above conditional expression 22<(d3m-d2m)×V2 / T23<29.

[0042] Figure 3 shows a data table of field curvature sensitivity in the T direction (meridional direction) and S direction (sagittal direction) of each lens L1 to L6 (the first lens to the sixth lens) when the optical lens according to the exemplary embodiment of the present application satisfies the conditional expressions (R5+R4) / (R5-R4)=0.5 and (d3m-d2m)×V2 / T23=15, that is, the values of these two conditional expressions are respectively smaller than the ranges defined by 1.3<(R5+R4) / (R5-R4)<1.7 and 22<(d3m-d2m)×V2 / T23<29 in the present application.

[0043] Figure 4 A table showing the field curvature sensitivity in the T direction (meridian direction) and S direction (sagittal direction) of an optical lens according to an exemplary embodiment of this application is provided, when the values ​​of the two conditional expressions (R5+R4) / (R5-R4) = 2.5 and (d3m-d2m)×V2 / T23 = 35, that is, when the values ​​of these two conditional expressions are greater than the ranges of 1.3 < (R5+R4) / (R5-R4) < 1.7 and 22 < (d3m-d2m)×V2 / T23 < 29 as defined in this application.

[0044] In the above Figure 2 , Figure 3 and Figure 4 The table shows the sensitivity of the center thickness of the first to sixth lenses to the field curvature in the T and S directions. The "Center Thickness" row for each lens includes two values: "+3μm" and "-3μm," representing the fluctuation of the actual center thickness of the lens compared to its design value. The first column of the table, from 0.1F to 1.0F, represents different fields of view. Comparison shows that when the two conditional expressions (R5+R4) / (R5-R4) and (d3m-d2m)×V2 / T23 satisfy the ranges defined by 1.3 < (R5+R4) / (R5-R4) < 1.7 and 22 < (d3m-d2m)×V2 / T23 < 29, respectively, the sensitivity performance of each lens is relatively good. This is manifested in the fact that, corresponding to different fields of view from near the center to near the edge, the sensitivity values ​​of each lens in the T and S directions change relatively uniformly, with relatively low fluctuations. When the two conditional expressions (R5+R4) / (R5-R4) and (d3m-d2m)×V2 / T23 do not satisfy the ranges defined by 1.3<(R5+R4) / (R5-R4)<1.7 and 22<(d3m-d2m)×V2 / T23<29, for example, when they are greater than or less than these ranges, the sensitivity performance of each lens decreases. This is manifested as follows: corresponding to different fields of view from near the center to near the edge, the sensitivity values ​​of each lens in the T and S directions change relatively largely, and the fluctuation is relatively high.

[0045] Taking the field curvature sensitivity in the T direction of the second lens L2 as an example, when the values ​​of the two conditional expressions (R5+R4) / (R5-R4) and (d3m-d2m)×V2 / T23 both meet the above-mentioned limits, the center thickness fluctuation of the second lens L2 is "+3μm" and "-3μm". The corresponding field curvature sensitivity values ​​in the T direction for the 0.1F field of view are -0.46 and -0.49, respectively, and the corresponding field curvature sensitivity values ​​in the T direction for the 1.0F field of view are 7.47 and -8.78, respectively. The numerical changes are relatively small. When the values ​​of both conditional expressions (R5+R4) / (R5-R4) and (d3m-d2m)×V2 / T23 are less than the ranges specified above, the center thickness fluctuation of the second lens L2 is "+3μm" and "-3μm". The corresponding field curvature sensitivity values ​​in the T direction of the 0.1F field of view are 0.43 and 0.18, respectively, and the corresponding field curvature sensitivity values ​​in the T direction of the 1.0F field of view are 19.48 and -19.52, respectively. The values ​​change relatively greatly. When the values ​​of both conditional expressions (R5+R4) / (R5-R4) and (d3m-d2m)×V2 / T23 are greater than the aforementioned limits, the center thickness fluctuation of the second lens L2 is "+3μm" and "-3μm", corresponding to field curvature sensitivity values ​​in the T direction at a 0.1F field of view of 0.64 and 0.44, respectively, and corresponding to field curvature sensitivity values ​​in the T direction at a 1.0F field of view of 23.15 and -24.26, respectively, showing relatively large numerical variations. It can be seen that when the conditions 1.3<(R5+R4) / (R5-R4)<1.7 and 22<(d3m-d2m)×V2 / T23<29 are met, the lens sensitivity performance is significantly improved.

[0046] In an exemplary embodiment, the plurality of spacer elements in the optical lens may further include a first spacer element located between the first lens and the second lens and abutting against the image side of the first lens.

[0047] In an exemplary embodiment, the plurality of spacer elements in the optical lens may further include a fourth spacer element located between the fourth lens and the fifth lens and abutting against the image side of the fourth lens.

[0048] In an exemplary embodiment, the plurality of spacer elements in the optical lens may further include a fifth spacer element located between the fifth lens and the sixth lens and abutting against the image side of the fifth lens.

[0049] In an exemplary embodiment, the plurality of spacers in the optical lens may further include a fifth auxiliary spacer located between the fifth spacer and the sixth lens.

[0050] In an exemplary embodiment, the plurality of spacer elements in the optical lens may further include a sixth spacer element located on the image side of the sixth lens and abutting against the image side surface of the sixth lens.

[0051] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional expression 2.5<EP12 / T12<3.5, wherein EP12 is the distance on the optical axis from the image side surface of the first spacer element to the object side surface of the second spacer element, and T12 is the distance on the optical axis from the image side surface of the first lens to the object side surface of the second lens. Controlling the ratio of the distance on the optical axis from the image side surface of the first spacer element to the object side surface of the second spacer element to the distance on the optical axis from the image side surface of the first lens to the object side surface of the second lens within this range helps ensure the thickness and position of the spacer element, so that field curvature can be effectively adjusted by adjusting the thickness of the spacer element at the position sensitive to field curvature, and the performance yield is improved; and the center thickness of the lenses on the optical axis can be reasonably controlled to prevent interference between the effective diameter surfaces of adjacent lenses in the optical axis direction after assembly, thereby avoiding lens appearance problems and abnormal performance problems.

[0052] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional expression 1.2<(CP5+EP45) / CT4<4, wherein CP5 is the maximum thickness of the fifth spacer element along the optical axis direction, EP45 is the distance on the optical axis from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element, and CT4 is the center thickness of the fourth lens on the optical axis. Controlling the ratio of the sum of the maximum thickness of the fifth spacer element along the optical axis direction and the distance on the optical axis from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element to the center thickness of the fourth lens on the optical axis within this range can reasonably control the edge thickness of the fourth lens and the center thickness of the lens on the optical axis, thereby ensuring good processing feasibility of the lens, effectively guaranteeing the accuracy of the bearing position between lenses after assembly, and making the optical parameters of the lens meet the design requirements; in addition, it can also prevent interference between the effective diameter surfaces of adjacent lenses in the optical axis direction after assembly, avoid lens appearance problems and abnormal performance problems, and improve the yield of appearance and performance.

[0053] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional expression 1.6<(d5m+d5s) / f5<2, wherein d5m is the inner diameter of the image side surface of the fifth spacer element, d5s is the inner diameter of the object side surface of the fifth spacer element, and f5 is the effective focal length of the fifth lens. Controlling the ratio of the sum of the inner diameter of the image side surface of the fifth spacer element and the inner diameter of the object side surface of the fifth spacer element to the effective focal length of the fifth lens within this range can effectively block the stray light optical path and reflection area, reduce the internal reflection stray light in the fifth lens, improve the lens performance and stray light state, and enhance the imaging quality of the lens.

[0054] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional expression 0.01<EP34 / (f4+f3)<0.03, wherein EP34 is the distance on the optical axis from the image side surface of the third spacing element to the object side surface of the fourth spacing element, f4 is the effective focal length of the fourth lens, and f3 is the effective focal length of the third lens. Controlling the ratio of the distance on the optical axis from the image side surface of the third spacing element to the object side surface of the fourth spacing element to the sum of the effective focal length of the fourth lens and the effective focal length of the third lens within this range helps control the edge thickness of the fourth lens and reduces the molding difficulty of the fourth lens; meanwhile, it is beneficial to ensure normal imaging of the optical lens.

[0055] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional expression 31.5<T23 / CP2+T34 / CP3<34.6, wherein T23 is the distance on the optical axis from the image side surface of the second lens to the object side surface of the third lens, CP2 is the maximum thickness of the second spacing element along the optical axis direction, T34 is the distance on the optical axis from the image side surface of the third lens to the object side surface of the fourth lens, and CP3 is the maximum thickness of the third spacing element along the optical axis direction. Controlling the sum of the ratio of the distance on the optical axis from the image side surface of the second lens to the object side surface of the third lens to the maximum thickness of the second spacing element along the optical axis direction, and the ratio of the distance on the optical axis from the image side surface of the third lens to the object side surface of the fourth lens to the maximum thickness of the third spacing element along the optical axis direction within this range can effectively control the edge thickness of the third lens, so that the lens can meet the processing and molding requirements; meanwhile, it can also effectively reduce optical distortion, lower the thickness sensitivity of the lens, and correct field curvature.

[0056] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional expression 15.5<CT4×N4 / CP4<30.5, wherein CT4 is the center thickness of the fourth lens on the optical axis, N4 is the refractive index of the fourth lens, and CP4 is the maximum thickness of the fourth spacing element along the optical axis direction. By controlling the center thickness of the fourth lens on the optical axis, the refractive index of the fourth lens and the maximum thickness of the fourth spacing element along the optical axis direction to satisfy the conditional expression 15.5<CT4×N4 / CP4<30.5, the ratio of the center thickness of the fourth lens to the thickness of the fourth spacing element is reasonably controlled, so that the lens is easy to be injection molded, the processability of the imaging system is improved, and meanwhile it is beneficial to ensure good imaging quality; and it can reduce the thickness sensitivity of the lens and correct field curvature.

[0057] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional expression 1.2<(D5m-d5m) / T45<4.5, wherein D5m is the outer diameter of the image-side surface of the fifth spacer element, d5m is the inner diameter of the image-side surface of the fifth spacer element, and T45 is the distance on the optical axis from the image-side surface of the fourth lens to the object-side surface of the fifth lens. By controlling the ratio of the difference between the outer diameter of the image-side surface of the fifth spacer element and the inner diameter of the image-side surface of the fifth spacer element to the distance on the optical axis from the image-side surface of the fourth lens to the object-side surface of the fifth lens within this range, it can be ensured that the fifth spacer element and the object-side surface of the sixth lens have a large contact area, which is beneficial to the assembly stability of the lens; meanwhile, the thickness of the fourth spacer element can be reasonably controlled, which is beneficial to improving the consistency of field curvature of the lens.

[0058] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional expression 4.8<(R10-R9) / (R10+R9)<5.1 and 1<D5m / d5m<1.5, wherein R10 is the radius of curvature of the image-side surface of the fifth lens, R9 is the radius of curvature of the object-side surface of the fifth lens, D5m is the outer diameter of the image-side surface of the fifth spacer element, and d5m is the inner diameter of the image-side surface of the fifth spacer element. By controlling the radii of curvature of the object-side surface and the image-side surface of the fifth lens to satisfy the conditional expression 4.8<(R10-R9) / (R10+R9)<5.1, and controlling the outer diameter of the image-side surface of the fifth spacer element and the inner diameter of the image-side surface of the fifth spacer element to satisfy the conditional expression 1<D5m / d5m<1.5, the inner and outer diameters of the image-side surface of the fifth spacer element can be reasonably controlled, which can effectively block excess light at the edge and avoid the generation of stray light; reasonable control of the radii of curvature of the object-side surface and the image-side surface of the fifth lens can determine whether the fifth lens is a concave lens or a convex lens, which jointly affects the structure of subsequent lenses. Meanwhile, reasonable control of the profile of the fifth lens is also beneficial for reducing the generation of stray ghost images, helping to improve the internal reflection stray light of the fifth lens and improving the imaging quality of the lens.

[0059] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional expression 11.0<f45 / EP45<23.0 and the conditional expression 0.8<CP5 / CP4<22.2, wherein f45 is the combined focal length of the fourth lens and the fifth lens, EP45 is the distance on the optical axis from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element, CP5 is the maximum thickness of the fifth spacer element along the optical axis direction, and CP4 is the maximum thickness of the fourth spacer element along the optical axis direction. By controlling the ratio of the combined focal length of the fourth lens and the fifth lens to the distance on the optical axis from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element within this range, and controlling the ratio of the maximum thickness of the fifth spacer element along the optical axis direction to the maximum thickness of the fourth spacer element along the optical axis direction within this range, the consistency of the field curvature of the lens can be effectively improved, the field curvature of the imaging lens can be controlled, problems such as stray light and light leakage can be prevented, which is beneficial to improving imaging quality and ensuring a good imaging effect.

[0060] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional expression |(d6m-d6s) / f6|<0.1, wherein d6m is the inner diameter of the image side surface of the sixth spacer element, d6s is the inner diameter of the object side surface of the sixth spacer element, and f6 is the effective focal length of the sixth lens. By controlling the inner diameter of the image side surface of the sixth spacer element, the inner diameter of the object side surface of the sixth spacer element and the effective focal length of the sixth lens to satisfy the conditional expression |(d6m-d6s) / f6|<0.1, edge light can be effectively blocked, stray light generated by excess light can be avoided, and the imaging quality of the lens can be improved; meanwhile, the arrangement of the sixth spacer element can also effectively increase the pushing force and reliability of the lens, and improve the assembly stability of the lens, thereby improving the performance yield.

[0061] In an exemplary embodiment, the optical lens of the present application may include at least one stop. The stop can constrain the optical path and control the light intensity. The stop can be arranged at an appropriate position of the optical lens, for example, the stop can be arranged between the object side and the first lens.

[0062] In an exemplary embodiment, optionally, the above optical lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0063] The optical lens according to the above embodiments of the present application includes a lens barrel, a six-piece imaging lens group disposed in the lens barrel, and a plurality of spacer elements. The first to sixth lenses are arranged in sequence along the optical axis from the object side to the image side. A second spacer element abutting against the image side surface of the second lens is disposed between the second lens and the third lens, and a third spacer element abutting against the image side surface of the third lens is disposed between the third lens and the fourth lens. Through this arrangement of the lens, and by controlling that the outer diameters D2m and D3m of the image side surfaces of the second spacer element and the third spacer element, the on-axis distance TD from the object side surface of the first lens to the image side surface of the sixth lens, and the effective focal length f2 of the second lens satisfy the conditional expressions (D3m-D2m) / TD < 0.4 and -1.9 < f2 / (D3m+D2m) < -1.2 respectively, marginal light rays can be effectively blocked and stray light can be avoided. On the premise of satisfying the above two conditional expressions, in order to improve the problem of lens sensitivity degradation caused by the limitation of the radial shape and size of the lens, controlling that the curvature radius R4 of the image side surface of the second lens and the curvature radius R5 of the object side surface of the third lens satisfy the conditional expression 1.3 < (R5+R4) / (R5-R4) < 1.7, and controlling that the inner diameters d2m and d3m of the image side surfaces of the second spacer element and the third spacer element, the Abbe number V2 of the second lens, and the on-axis spacing T23 between the second lens and the third lens satisfy the conditional expression 22 < (d3m-d2m)×V2 / T23 < 29, can correspondingly improve the sensitivity performance of the lens, facilitate the adjustment of field curvature, and help improve the imaging quality.

[0064] In addition, while satisfying the requirements of large image surface and wide angle, the design of the six-piece optical lens according to the above embodiments of the present application, by reasonably controlling the positions of the fifth lens and the fourth spacer element located between the fourth lens and the fifth lens, adopts fewer degrees of freedom for design to reduce production cost and improve lens reliability; meanwhile, the lens solution provided by the present application combines the processability of the lens structure and the requirements of optical parameters, and can form an optical lens design solution with a head diameter of, for example, φ6.6mm and a maximum outer diameter of, for example, φ9.6mm on the premise of satisfying the stability of lens assembly, which can better meet the application requirements of main cameras on next-generation high-end smartphones.

[0065] In the embodiments of the present application, one or more of the mirror surfaces of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may be aspheric mirror surfaces. Aspheric lenses have better curvature radius characteristics, and have the advantages of improving distortion aberration and improving astigmatism aberration. After adopting aspheric lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving imaging quality.

[0066] However, it should be understood by those skilled in the art that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens and the number of spacer elements can be changed to obtain various results and advantages described in this specification, which is not specifically limited in the present application. For example, although the description has been made by taking six lenses as an example in the embodiment, the optical lens is not limited to including six lenses. If necessary, the optical lens may further include other numbers of lenses. For another example, according to requirements, the optical lens may also include other numbers of spacer elements different from those described in the above embodiments.

[0067] On the other hand, the optical lens according to the exemplary embodiment of the present application may include a lens barrel, a six-piece imaging lens group disposed in the lens barrel, and a plurality of spacer elements, wherein the first to sixth lenses are arranged sequentially along the optical axis from the object side to the image side. A second spacer element abutting against the image side surface of the second lens is disposed between the second lens and the third lens, and a third spacer element abutting against the image side surface of the third lens is disposed between the third lens and the fourth lens. With this arrangement of the lens, and by controlling the distance EP12 on the optical axis from the image side surface of the first spacer element to the object side surface of the second spacer element and the distance T12 on the optical axis from the image side surface of the first lens to the object side surface of the second lens to satisfy the conditional expression 2.5 < EP12 / T12 < 3.5, it is helpful to ensure the thickness and position of the spacer elements, so that the field curvature can be effectively adjusted by adjusting the thickness of the spacer element at the field curvature sensitive position, and the performance yield can be improved; moreover, the central thickness of the lenses on the optical axis can be reasonably controlled to prevent interference between the effective diameter surfaces of adjacent lenses in the optical axis direction after assembly, and avoid lens appearance problems and abnormal performance problems.

[0068] In yet another aspect, the optical lens according to the exemplary embodiment of the present application may include a lens barrel, a six-piece imaging lens group disposed in the lens barrel, and a plurality of spacer elements, wherein the first to sixth lenses are arranged sequentially along the optical axis from the object side to the image side. A second spacer element abutting against the image side surface of the second lens is disposed between the second lens and the third lens, and a third spacer element abutting against the image side surface of the third lens is disposed between the third lens and the fourth lens. With this arrangement of the lens, and by controlling the distance EP34 on the optical axis from the image side surface of the third spacer element to the object side surface of the fourth spacer element, and the effective focal lengths f4 and f3 of the fourth lens and the third lens to satisfy the conditional expression 0.01 < EP34 / (f4+f3) < 0.03, it is helpful to control the edge thickness of the fourth lens and reduce the molding difficulty of the fourth lens; meanwhile, it is beneficial to ensure the normal imaging of the optical lens.

[0069] In another aspect, an optical lens according to an exemplary embodiment of the present application may include a lens barrel, a six-piece imaging lens group disposed in the lens barrel, and a plurality of spacing elements. The first to sixth lenses are arranged in sequence along the optical axis from the object side to the image side, wherein a second spacing element abutting against the image side surface of the second lens is disposed between the second lens and the third lens, and a third spacing element abutting against the image side surface of the third lens is disposed between the third lens and the fourth lens. Through this arrangement of the lens, by controlling the combined focal length f45 of the fourth lens and the fifth lens and the distance EP45 on the optical axis from the image side surface of the fourth spacing element to the object side surface of the fifth spacing element, the condition 11.0<f45 / EP45<23.0 is satisfied, and by controlling the maximum thicknesses CP5 and CP4 of the fifth and fourth spacing elements along the optical axis direction, the condition 0.8<CP5 / CP4<22.2 is satisfied, which can effectively improve the consistency of the field curvature of the lens, control the field curvature of the imaging lens, prevent problems such as stray light and light leakage, help improve the imaging quality and ensure a good imaging effect.

[0070] Hereinafter, specific embodiments of the optical lens applicable to the above embodiments are further described with reference to the accompanying drawings.

[0071] Example 1

[0072] Hereinafter, with reference to Figure 5 the optical lens according to Embodiment 1 of the present application will be described.

[0073] As shown in Figure 5 , in this embodiment, the optical lens includes a lens barrel P0, and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 accommodated in the lens barrel P0 and arranged in sequence along the optical axis from the object side to the image side.

[0074] In this embodiment, the optical lens further includes a plurality of spacing elements: a first spacing element P1 located between the first lens E1 and the second lens E2 and abutting against the image side surface of the first lens E1; a second spacing element P2 located between the second lens E2 and the third lens E3 and abutting against the image side surface of the second lens E2; a third spacing element P3 located between the third lens E3 and the fourth lens E4 and abutting against the image side surface of the third lens E3; a fourth spacing element P4 located between the fourth lens E4 and the fifth lens E5 and abutting against the image side surface of the fourth lens E4; a fifth spacing element P5 and a fifth auxiliary spacing element P5b located between the fifth lens E5 and the sixth lens E6, wherein the fifth spacing element P5 abuts against the image side surface of the fifth lens E5, and the fifth auxiliary spacing element P5b is located between the fifth spacing element P5 and the sixth lens E6; and a sixth spacing element P6 located on the image side of the sixth lens and abutting against the image side surface of the sixth lens.

[0075] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave.

[0076] Table 1 shows the basic parameters of the optical lens of Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0077]

[0078]

[0079] Table 1

[0080] In Embodiment 1, the object-side surface and image-side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0081]

[0082] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., 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 i-th order correction coefficient of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order coefficients A4, A6, A8, A14, A15, A16, A17, A18, A19 ... 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0083] A4 2.96E-03 -5.45E-02 -8.94E-03 3.39E-02 -8.80E-02 -1.74E-01 A6 -3.70E-03 -1.26E-03 1.50E-02 1.26E-02 -9.24E-03 -1.11E-02 A8 -2.50E-03 -9.50E-04 7.69E-04 1.28E-03 -1.19E-03 -3.52E-04 A10 -9.77E-04 -1.24E-04 5.74E-04 7.12E-04 4.11E-04 2.16E-03 A12 -3.24E-04 7.98E-06 1.67E-04 2.73E-04 2.41E-04 6.63E-04 A14 -7.35E-05 -1.09E-05 -7.85E-07 1.10E-04 1.85E-04 4.70E-04 A16 -1.70E-05 -6.59E-06 8.09E-06 3.78E-05 8.34E-05 2.25E-04 A18 -2.57E-06 -8.13E-07 -1.22E-06 2.54E-05 4.45E-05 1.16E-04 A20 2.69E-06 7.81E-07 -9.73E-07 4.94E-06 1.54E-05 3.47E-05 A22 1.67E-06 2.76E-06 -5.99E-06 9.68E-06 6.23E-06 3.67E-06 A24 4.64E-06 1.84E-06 -1.94E-06 5.15E-06 3.16E-06 -3.15E-06 A26 -2.45E-07 3.22E-06 1.81E-06 4.69E-06 1.36E-06 -3.03E-06 A28 -3.07E-08 4.26E-07 4.74E-06 -2.50E-06 2.45E-08 -7.23E-07 A30 -4.39E-07 -5.26E-07 4.01E-07 -8.38E-07 -1.14E-06 -2.19E-06

[0084] Table 2-1

[0085]

[0086]

[0087] Table 2-2

[0088] Example 2

[0089] The following is for reference Figure 6 Describes an optical lens according to Embodiment 2 of this application.

[0090] like Figure 6 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0. The optical lens also includes multiple spacer elements: a first spacer element P1, located between the first lens E1 and the second lens E2 and abutting against the image-side surface of the first lens E1; a second spacer element P2, located between the second lens E2 and the third lens E3 and abutting against the image-side surface of the second lens E2; a third spacer element P3, located between the third lens E3 and the fourth lens E4 and abutting against the image-side surface of the third lens E3; a fourth spacer element P4, located between the fourth lens E4 and the fifth lens E5 and abutting against the image-side surface of the fourth lens E4; a fifth spacer element P5 and a fifth auxiliary spacer element P5b, located between the fifth lens E5 and the sixth lens E6, wherein the fifth spacer element P5 abuts against the image-side surface of the fifth lens E5, and the fifth auxiliary spacer element P5b is located between the fifth spacer element P5 and the sixth lens E6; and a sixth spacer element P6, located on the image-side surface of the sixth lens and abutting against the image-side surface of the sixth lens.

[0091] The structure of the optical lens in this embodiment is the same as that of the optical lens in Embodiment 1. That is, the basic parameter table of the optical lens in this embodiment is the same as that in Table 1, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 2-1 and 2-2.

[0092] The difference between this embodiment and Embodiment 1 lies in the structural dimensions of some spacer elements and the spacing of some spacer elements along the optical axis. For example, the parameters such as the inner diameter d3m of the image side of the third spacer element P3, the outer diameter D3m of the image side of the third spacer element P3, the inner diameter d5s of the object side of the fifth spacer element P5, the inner diameter d6s of the object side of the sixth spacer element P6, the inner diameter d6m of the image side of the sixth spacer element P6, the distance EP34 between the image side of the third spacer element P3 and the object side of the fourth spacer element P4 along the optical axis, and the maximum thickness CP5 of the fifth spacer element P5 along the optical axis are different.

[0093] The parameters described in this embodiment and Embodiment 1, as well as the following parameters: the inner diameter d2m of the image-side surface of the second spacer P2, the outer diameter D2m of the image-side surface of the second spacer P2, the inner diameter d5m of the image-side surface of the fifth spacer P5, the outer diameter D5m of the image-side surface of the fifth spacer P5, the distance EP12 between the image-side surface of the first spacer P1 and the object-side surface of the second spacer P2 along the optical axis, the maximum thickness CP2 of the second spacer P2 along the optical axis, the maximum thickness CP3 of the third spacer P3 along the optical axis, the maximum thickness CP4 of the fourth spacer P4 along the optical axis, and the distance EP45 between the image-side surface of the fourth spacer and the object-side surface of the fifth spacer, are shown in Table 7. Furthermore, the schematic diagram of the above parameters in the optical lens structure is shown below. Figure 1 As shown.

[0094] Example 3

[0095] The following is for reference Figure 7 The optical lens according to Embodiment 3 of this application is described.

[0096] like Figure 7 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0. The optical lens also includes multiple spacer elements: a first spacer element P1, located between the first lens E1 and the second lens E2 and abutting against the image-side surface of the first lens E1; a second spacer element P2, located between the second lens E2 and the third lens E3 and abutting against the image-side surface of the second lens E2; a third spacer element P3, located between the third lens E3 and the fourth lens E4 and abutting against the image-side surface of the third lens E3; a fourth spacer element P4, located between the fourth lens E4 and the fifth lens E5 and abutting against the image-side surface of the fourth lens E4; a fifth spacer element P5 and a fifth auxiliary spacer element P5b, located between the fifth lens E5 and the sixth lens E6, wherein the fifth spacer element P5 abuts against the image-side surface of the fifth lens E5, and the fifth auxiliary spacer element P5b is located between the fifth spacer element P5 and the sixth lens E6; and a sixth spacer element P6, located on the image-side surface of the sixth lens and abutting against the image-side surface of the sixth lens.

[0097] The structure of the optical lens in this embodiment is the same as that of the optical lens in Embodiment 1. That is, the basic parameter table of the optical lens in this embodiment is the same as that in Table 1, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 2-1 and 2-2.

[0098] The difference between this embodiment and Embodiment 1 lies in the structural dimensions of some spacer elements and the spacing of some spacer elements along the optical axis. For example, the parameters such as the inner diameter d5s of the object side of the fifth spacer element P5, the inner diameter d5m of the image side of the fifth spacer element P5, the outer diameter D5m of the image side of the fifth spacer element P5, the inner diameter d6s of the object side of the sixth spacer element P6, the inner diameter d6m of the image side of the sixth spacer element P6, the distance EP34 between the image side of the third spacer element P3 and the object side of the fourth spacer element P4 on the optical axis, the distance EP45 between the image side of the fourth spacer element and the object side of the fifth spacer element on the optical axis, and the maximum thickness CP5 of the fifth spacer element P5 along the optical axis are different.

[0099] The parameters described in this embodiment and Embodiment 1, as well as the following parameters: the inner diameter d2m of the image-side surface of the second spacer P2, the outer diameter D2m of the image-side surface of the second spacer P2, the inner diameter d3m of the image-side surface of the third spacer P3, the outer diameter D3m of the image-side surface of the third spacer P3, the distance EP12 between the image-side surface of the first spacer P1 and the object-side surface of the second spacer P2 along the optical axis, the maximum thickness CP2 of the second spacer P2 along the optical axis, the maximum thickness CP3 of the third spacer P3 along the optical axis, and the maximum thickness CP4 of the fourth spacer P4 along the optical axis, are shown in Table 7. Furthermore, the schematic diagram of the above parameters in the optical lens structure is shown below. Figure 1 As shown.

[0100] Figure 8 The on-axis chromatic aberration curves of the optical lenses of Embodiments 1, 2 and 3 are shown, which represent the deviation of light of different wavelengths from the convergence focal point after passing through the lens. Figure 9 The astigmatism curves of the optical lenses of Embodiments 1, 2 and 3 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 10 The distortion curves of the optical lenses of Embodiments 1, 2, and 3 are shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 8 to 10 It can be seen that the optical lenses given in Examples 1, 2 and 3 can achieve good imaging quality.

[0101] Example 4

[0102] The following is for reference Figure 11 The optical lens according to Embodiment 4 of this application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted.

[0103] like Figure 11As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0.

[0104] In this embodiment, the optical lens further includes a plurality of spacer elements: a first spacer element P1, located between the first lens E1 and the second lens E2 and abutting against the image-side surface of the first lens E1; a second spacer element P2, located between the second lens E2 and the third lens E3 and abutting against the image-side surface of the second lens E2; a third spacer element P3, located between the third lens E3 and the fourth lens E4 and abutting against the image-side surface of the third lens E3; a fourth spacer element P4, located between the fourth lens E4 and the fifth lens E5 and abutting against the image-side surface of the fourth lens E4; a fifth spacer element P5 and a fifth auxiliary spacer element P5b, located between the fifth lens E5 and the sixth lens E6, wherein the fifth spacer element P5 abuts against the image-side surface of the fifth lens E5, and the fifth auxiliary spacer element P5b is located between the fifth spacer element P5 and the sixth lens E6; and a sixth spacer element P6, located on the image-side surface of the sixth lens and abutting against the image-side surface of the sixth lens.

[0105] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave.

[0106] Table 3 shows the basic parameters of the optical lens of Example 4, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 4-1 and 4-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S12 in Example 4. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0107]

[0108] Table 3

[0109] A4 4.16E-03 -5.49E-02 -9.86E-03 3.40E-02 -8.92E-02 -1.74E-01 A6 -4.04E-03 -1.35E-03 1.43E-02 1.21E-02 -9.57E-03 -1.11E-02 A8 -2.73E-03 -1.15E-03 8.88E-04 1.40E-03 -1.19E-03 -3.13E-04 A10 -1.18E-03 -5.13E-05 6.98E-04 7.46E-04 3.08E-04 1.98E-03 A12 -3.72E-04 4.30E-05 2.06E-04 2.65E-04 1.76E-04 4.71E-04 A14 -1.06E-04 1.25E-05 2.42E-05 1.08E-04 1.30E-04 3.88E-04 A16 -9.64E-06 -1.30E-06 1.28E-05 3.75E-05 5.87E-05 1.74E-04 A18 -2.77E-06 8.62E-07 2.04E-10 2.43E-05 2.83E-05 1.06E-04 A20 4.26E-06 -3.91E-06 -7.81E-07 3.36E-06 1.04E-05 2.92E-05 A22 -7.40E-07 -1.13E-06 -5.27E-06 4.12E-06 2.71E-06 8.93E-06 A24 3.25E-06 -1.29E-06 -2.80E-06 5.73E-07 1.96E-06 -1.70E-06 A26 3.19E-08 1.35E-06 -1.55E-06 4.02E-06 -1.28E-08 -3.35E-08 A28 2.06E-06 -1.36E-07 2.52E-06 -1.69E-08 4.30E-07 -1.80E-06 A30 -1.06E-06 -1.45E-08 5.12E-07 1.07E-06 -1.16E-07 -1.21E-07

[0110] Table 4-1

[0111]

[0112]

[0113] Table 4-2

[0114] Example 5

[0115] The following is for reference Figure 12 The optical lens according to Embodiment 5 of this application is described.

[0116] like Figure 12 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0. The optical lens also includes multiple spacer elements: a first spacer element P1, located between the first lens E1 and the second lens E2 and abutting against the image-side surface of the first lens E1; a second spacer element P2, located between the second lens E2 and the third lens E3 and abutting against the image-side surface of the second lens E2; a third spacer element P3, located between the third lens E3 and the fourth lens E4 and abutting against the image-side surface of the third lens E3; a fourth spacer element P4, located between the fourth lens E4 and the fifth lens E5 and abutting against the image-side surface of the fourth lens E4; a fifth spacer element P5 and a fifth auxiliary spacer element P5b, located between the fifth lens E5 and the sixth lens E6, wherein the fifth spacer element P5 abuts against the image-side surface of the fifth lens E5, and the fifth auxiliary spacer element P5b is located between the fifth spacer element P5 and the sixth lens E6; and a sixth spacer element P6, located on the image-side surface of the sixth lens and abutting against the image-side surface of the sixth lens.

[0117] The structure of the optical lens in this embodiment is the same as that of the optical lens in embodiment 4. That is, the basic parameter table of the optical lens in this embodiment is the same as that in Table 3, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 4-1 and 4-2.

[0118] The difference between this embodiment and embodiment 4 lies in the structural dimensions of some spacer elements and the spacing of some spacer elements along the optical axis. For example, the parameters such as the inner diameter d2m of the image side of the second spacer element P2, the outer diameter D2m of the image side of the second spacer element P2, the inner diameter d3m of the image side of the third spacer element P3, the outer diameter D3m of the image side of the third spacer element P3, the distance EP34 between the image side of the third spacer element P3 and the object side of the fourth spacer element P4 along the optical axis, the maximum thickness CP4 of the fourth spacer element P4 along the optical axis, and the distance EP45 between the image side of the fourth spacer element and the object side of the fifth spacer element along the optical axis are different.

[0119] The parameters described above in this embodiment and Embodiment 4, as well as the following parameters: the inner diameter d5s of the object-side surface of the fifth spacer element P5, the inner diameter d5m of the image-side surface of the fifth spacer element P5, the outer diameter D5m of the image-side surface of the fifth spacer element P5, the inner diameter d6s of the object-side surface of the sixth spacer element P6, the inner diameter d6m of the image-side surface of the sixth spacer element P6, the distance EP12 on the optical axis from the image-side surface of the first spacer element P1 to the object-side surface of the second spacer element P2, the maximum thickness CP2 of the second spacer element P2 along the optical axis, the maximum thickness CP3 of the third spacer element P3 along the optical axis, and the maximum thickness CP5 of the fifth spacer element P5 along the optical axis, are shown in Table 7. Furthermore, the schematic diagram of the above parameters in the optical lens structure is shown below. Figure 1 As shown.

[0120] Example 6

[0121] The following is for reference Figure 13 The optical lens according to Embodiment 6 of this application is described.

[0122] like Figure 13As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0. The optical lens also includes multiple spacer elements: a first spacer element P1, located between the first lens E1 and the second lens E2 and abutting against the image-side surface of the first lens E1; a second spacer element P2, located between the second lens E2 and the third lens E3 and abutting against the image-side surface of the second lens E2; a third spacer element P3, located between the third lens E3 and the fourth lens E4 and abutting against the image-side surface of the third lens E3; a fourth spacer element P4, located between the fourth lens E4 and the fifth lens E5 and abutting against the image-side surface of the fourth lens E4; a fifth spacer element P5 and a fifth auxiliary spacer element P5b, located between the fifth lens E5 and the sixth lens E6, wherein the fifth spacer element P5 abuts against the image-side surface of the fifth lens E5, and the fifth auxiliary spacer element P5b is located between the fifth spacer element P5 and the sixth lens E6; and a sixth spacer element P6, located on the image-side surface of the sixth lens and abutting against the image-side surface of the sixth lens.

[0123] The structure of the optical lens in this embodiment is the same as that of the optical lens in embodiment 4. That is, the basic parameter table of the optical lens in this embodiment is the same as that in Table 3, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 4-1 and 4-2.

[0124] The difference between this embodiment and embodiment 4 lies in the structural dimensions of some spacer elements and the spacing of some spacer elements along the optical axis. For example, the outer diameter D2m of the image side of the second spacer element P2, the inner diameter d3m of the image side of the third spacer element P3, the outer diameter D3m of the image side of the third spacer element P3, the inner diameter d6s of the object side of the sixth spacer element P6, the inner diameter d6m of the image side of the sixth spacer element P6, the distance EP34 between the image side of the third spacer element P3 and the object side of the fourth spacer element P4 along the optical axis, and the maximum thickness CP4 of the fourth spacer element P4 along the optical axis are different.

[0125] The parameters described above in this embodiment and Embodiment 4, as well as the following parameters: the inner diameter d2m of the image-side surface of the second spacer P2, the inner diameter d5s of the object-side surface of the fifth spacer P5, the inner diameter d5m of the image-side surface of the fifth spacer P5, the outer diameter D5m of the image-side surface of the fifth spacer P5, the distance EP12 between the image-side surface of the first spacer P1 and the object-side surface of the second spacer P2 along the optical axis, the maximum thickness CP2 of the second spacer P2 along the optical axis, the maximum thickness CP3 of the third spacer P3 along the optical axis, the distance EP45 between the image-side surface of the fourth spacer and the object-side surface of the fifth spacer P5 along the optical axis, and the maximum thickness CP5 of the fifth spacer P5 along the optical axis, are shown in Table 7. Furthermore, the schematic diagram of the above parameters in the optical lens structure is shown below. Figure 1 As shown.

[0126] Figure 14 The on-axis chromatic aberration curves of the optical lenses of Embodiments 4, 5 and 6 are shown, which represent the deviation of light of different wavelengths from the convergence focal point after passing through the lens. Figure 15 The astigmatism curves of the optical lenses of Embodiments 4, 5 and 6 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 16 The distortion curves of the optical lenses of Embodiments 4, 5, and 6 are shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 14 to 16 It can be seen that the optical lenses given in Examples 4, 5 and 6 can achieve good imaging quality.

[0127] Example 7

[0128] The following is for reference Figure 17 The optical lens according to Embodiment 7 of this application is described.

[0129] like Figure 17 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0.

[0130] In this embodiment, the optical lens further includes a plurality of spacer elements: a first spacer element P1, located between the first lens E1 and the second lens E2 and abutting against the image-side surface of the first lens E1; a second spacer element P2, located between the second lens E2 and the third lens E3 and abutting against the image-side surface of the second lens E2; a third spacer element P3, located between the third lens E3 and the fourth lens E4 and abutting against the image-side surface of the third lens E3; a fourth spacer element P4, located between the fourth lens E4 and the fifth lens E5 and abutting against the image-side surface of the fourth lens E4; a fifth spacer element P5 and a fifth auxiliary spacer element P5b, located between the fifth lens E5 and the sixth lens E6, wherein the fifth spacer element P5 abuts against the image-side surface of the fifth lens E5, and the fifth auxiliary spacer element P5b is located between the fifth spacer element P5 and the sixth lens E6; and a sixth spacer element P6, located on the image-side surface of the sixth lens and abutting against the image-side surface of the sixth lens.

[0131] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave.

[0132] Table 5 shows the basic parameters of the optical lens of Example 7, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 6-1 and 6-2 show the conic surface constants and higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S12 in Example 7. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0133] Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0134]

[0135] Table 5

[0136] Conic surface constant 2.66E-02 -1.55E-01 1.85E+01 2.31E+00 -9.90E+01 9.90E+01 A4 4.65E-03 -5.48E-02 -9.12E-03 3.46E-02 -9.10E-02 -1.75E-01 A6 -3.41E-03 -2.96E-04 1.47E-02 1.28E-02 -8.56E-03 -1.15E-02 A8 -2.37E-03 -1.33E-03 2.78E-04 1.20E-03 -9.94E-04 -1.18E-04 A10 -1.06E-03 -9.93E-05 6.67E-04 7.90E-04 1.86E-04 1.89E-03 A12 -3.32E-04 2.26E-05 1.81E-04 3.10E-04 3.22E-04 7.52E-04 A14 -1.08E-04 6.47E-07 1.55E-05 1.34E-04 1.36E-04 5.51E-04 A16 -1.30E-05 -1.31E-06 1.14E-05 5.85E-05 1.23E-04 3.14E-04 A18 -1.09E-05 -8.09E-07 4.84E-08 3.27E-05 3.18E-05 1.90E-04 A20 2.32E-06 -3.09E-06 3.09E-07 8.37E-06 3.58E-05 6.97E-05 A22 -2.20E-06 -4.96E-09 -4.48E-06 5.85E-06 2.90E-06 2.41E-05 A24 4.48E-06 -1.11E-06 -3.68E-06 3.31E-06 1.35E-05 -2.84E-07 A26 6.11E-07 -4.06E-08 -1.89E-06 6.16E-06 -1.49E-06 -6.82E-07 A28 2.31E-06 -1.44E-06 2.61E-06 1.81E-06 3.96E-06 -5.52E-06 A30 -1.63E-06 -5.92E-07 9.14E-07 8.67E-07 -3.32E-06 1.21E-06

[0137] Table 6-1

[0138]

[0139]

[0140] Table 6-2

[0141] Example 8

[0142] The following is for reference Figure 18 The optical lens according to Embodiment 8 of this application is described.

[0143] like Figure 18 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0. The optical lens also includes multiple spacer elements: a first spacer element P1, located between the first lens E1 and the second lens E2 and abutting against the image-side surface of the first lens E1; a second spacer element P2, located between the second lens E2 and the third lens E3 and abutting against the image-side surface of the second lens E2; a third spacer element P3, located between the third lens E3 and the fourth lens E4 and abutting against the image-side surface of the third lens E3; a fourth spacer element P4, located between the fourth lens E4 and the fifth lens E5 and abutting against the image-side surface of the fourth lens E4; a fifth spacer element P5 and a fifth auxiliary spacer element P5b, located between the fifth lens E5 and the sixth lens E6, wherein the fifth spacer element P5 abuts against the image-side surface of the fifth lens E5, and the fifth auxiliary spacer element P5b is located between the fifth spacer element P5 and the sixth lens E6; and a sixth spacer element P6, located on the image-side surface of the sixth lens and abutting against the image-side surface of the sixth lens.

[0144] The structure of the optical lens in this embodiment is the same as that of the optical lens in embodiment 7. That is, the basic parameter table of the optical lens in this embodiment is the same as that in Table 5, and the table of conic surface constants and higher-order coefficients of the aspherical mirror is the same as that in Tables 6-1 and 6-2.

[0145] The difference between this embodiment and embodiment 7 lies in the structural dimensions of some spacer elements and the spacing of some spacer elements along the optical axis. For example, the outer diameter D2m of the image side of the second spacer element P2, the inner diameter d6s of the object side of the sixth spacer element P6, the inner diameter d6m of the image side of the sixth spacer element P6, the maximum thickness CP4 of the fourth spacer element P4 along the optical axis, and the distance EP45 between the image side of the fourth spacer element and the object side of the fifth spacer element on the optical axis are different.

[0146] The parameters described above in this embodiment and Embodiment 4, as well as the following parameters: the inner diameter d2m of the image-side surface of the second spacer P2, the inner diameter d3m of the image-side surface of the third spacer P3, the outer diameter D3m of the image-side surface of the third spacer P3, the inner diameter d5s of the object-side surface of the fifth spacer P5, the inner diameter d5m of the image-side surface of the fifth spacer P5, the outer diameter D5m of the image-side surface of the fifth spacer P5, the distance EP12 between the image-side surface of the first spacer P1 and the object-side surface of the second spacer P2 on the optical axis, the maximum thickness CP2 of the second spacer P2 along the optical axis, the maximum thickness CP3 of the third spacer P3 along the optical axis, the distance EP34 between the image-side surface of the third spacer P3 and the object-side surface of the fourth spacer P4 on the optical axis, and the maximum thickness CP5 of the fifth spacer P5 along the optical axis, are shown in Table 7. Furthermore, the schematic diagram of the above parameters in the optical lens structure is shown below. Figure 1 As shown.

[0147] Example 9

[0148] The following is for reference Figure 19 The optical lens according to Embodiment 9 of this application is described.

[0149] like Figure 19 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0. The optical lens also includes multiple spacer elements: a first spacer element P1, located between the first lens E1 and the second lens E2 and abutting against the image-side surface of the first lens E1; a second spacer element P2, located between the second lens E2 and the third lens E3 and abutting against the image-side surface of the second lens E2; a third spacer element P3, located between the third lens E3 and the fourth lens E4 and abutting against the image-side surface of the third lens E3; a fourth spacer element P4, located between the fourth lens E4 and the fifth lens E5 and abutting against the image-side surface of the fourth lens E4; a fifth spacer element P5 and a fifth auxiliary spacer element P5b, located between the fifth lens E5 and the sixth lens E6, wherein the fifth spacer element P5 abuts against the image-side surface of the fifth lens E5, and the fifth auxiliary spacer element P5b is located between the fifth spacer element P5 and the sixth lens E6; and a sixth spacer element P6, located on the image-side surface of the sixth lens and abutting against the image-side surface of the sixth lens.

[0150] The structure of the optical lens in this embodiment is the same as that of the optical lens in embodiment 7. That is, the basic parameter table of the optical lens in this embodiment is the same as that in Table 5, and the table of conic surface constants and higher-order coefficients of the aspherical mirror is the same as that in Tables 6-1 and 6-2.

[0151] The difference between this embodiment and embodiment 7 lies in the structural dimensions of some spacer elements and the spacing of some spacer elements along the optical axis. For example, the outer diameter D2m of the image side of the second spacer element P2, the inner diameter d5s of the object side of the fifth spacer element P5, the outer diameter D5m of the image side of the fifth spacer element P5, the inner diameter d6s of the object side of the sixth spacer element P6, the inner diameter d6m of the image side of the sixth spacer element P6, the distance EP34 between the image side of the third spacer element P3 and the object side of the fourth spacer element P4 along the optical axis, the maximum thickness CP4 of the fourth spacer element P4 along the optical axis, the distance EP45 between the image side of the fourth spacer element and the object side of the fifth spacer element along the optical axis, and the maximum thickness CP5 of the fifth spacer element P5 along the optical axis are different.

[0152] The parameters described above in this embodiment and Embodiment 7, as well as the following parameters: the inner diameter d2m of the image-side surface of the second spacer P2, the inner diameter d3m of the image-side surface of the third spacer P3, the outer diameter D3m of the image-side surface of the third spacer P3, the inner diameter d5m of the image-side surface of the fifth spacer P5, the distance EP12 between the image-side surface of the first spacer P1 and the object-side surface of the second spacer P2 along the optical axis, the maximum thickness CP2 of the second spacer P2 along the optical axis, and the maximum thickness CP3 of the third spacer P3 along the optical axis, are shown in Table 7. Furthermore, the schematic diagram of the above parameters in the optical lens structure is shown below. Figure 1 As shown.

[0153] Figure 20 The on-axis chromatic aberration curves of the optical lenses of Embodiments 7, 8 and 9 are shown, which represent the deviation of light of different wavelengths from the convergence focal point after passing through the lens. Figure 21 The astigmatism curves of the optical lenses of Embodiments 7, 8 and 9 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 22 The distortion curves of the optical lenses of Embodiments 7, 8, and 9 are shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 20 to 22 It can be seen that the optical lenses given in Examples 7, 8 and 9 can achieve good imaging quality.

[0154]

[0155]

[0156] Table 7

[0157] Furthermore, in Examples 1 to 9, the effective focal length f of the optical lens, the effective focal length values ​​f1 to f6 of each lens, the combined focal length f45 of the fourth and fifth lenses, the distance TD on the optical axis from the object side of the first lens to the image side of the sixth lens, and half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical lens are shown in Table 8.

[0158] f(mm) 4.88 4.88 4.88 4.88 4.88 4.88 4.88 4.88 4.88 f1(mm) 4.51 4.51 4.51 4.44 4.44 4.44 4.42 4.42 4.42 f2 (mm) -13.85 -13.85 -13.85 -13.32 -13.32 -13.32 -13.30 -13.30 -13.30 f3 (mm) 76.00 76.00 76.00 63.42 63.42 63.42 53.88 53.88 53.88 f4 (mm) -35.06 -35.06 -35.06 -30.48 -30.48 -30.48 -28.07 -28.07 -28.07 f5 (mm) 6.76 6.76 6.76 6.77 6.77 6.77 6.85 6.85 6.85 f6 (mm) -5.40 -5.40 -5.40 -5.36 -5.36 -5.36 -5.50 -5.50 -5.50 f45 (mm) 8.24 8.24 8.24 8.51 8.51 8.51 8.73 8.73 8.73 TD(mm) 4.29 4.29 4.29 4.35 4.35 4.35 4.33 4.33 4.33 ImgH(mm) 4.60 4.60 4.60 4.60 4.60 4.60 4.60 4.60 4.60

[0159] Table 8

[0160] Examples 1 to 9 respectively satisfy the conditions shown in Table 9.

[0161] (D3m-D2m) / TD 0.309 0.021 0.309 0.294 0.005 0.012 0.307 0.330 0.023 (R5+R4) / (R5-R4) 1.517 1.517 1.517 1.646 1.646 1.646 1.347 1.347 1.347 f2 / (D3m+D2m) -1.560 -1.814 -1.560 -1.493 -1.746 -1.753 -1.435 -1.451 -1.267 (d3m-d2m)×V2 / T23 27.636 28.195 27.636 25.834 22.525 24.267 22.596 22.596 22.596 EP12 / T12 2.992 2.992 2.992 3.253 3.253 3.253 3.323 3.323 3.323 (CP5+EP45) / CT4 2.342 2.377 2.515 1.428 1.418 1.428 3.750 3.729 3.925 (d5m+d5s) / f5 1.900 1.888 1.703 1.622 1.622 1.622 1.877 1.877 1.868 EP34 / (f4+f3) 0.016 0.016 0.015 0.019 0.020 0.020 0.014 0.014 0.013 T23 / CP2+T34 / CP3 31.669 31.669 31.669 33.249 33.249 33.249 34.530 34.530 34.530 CT4×N4 / CP4 30.154 30.154 30.154 21.480 24.872 24.872 25.121 21.696 15.910 (D5m-d5m) / T45 1.251 1.251 3.619 4.238 4.238 4.238 1.266 1.266 1.461 D5m / d5m 1.092 1.092 1.327 1.403 1.403 1.403 1.092 1.092 1.106 (R10-R9) / (R10+R9) 4.811 4.811 4.811 4.989 4.989 4.989 5.047 5.047 5.047 f45 / EP45 22.708 22.708 22.099 22.226 22.401 22.226 12.092 12.193 11.766 CP5 / CP4 19.688 20.313 22.188 1.000 1.158 1.158 18.526 16.000 12.733 |(d6m-d6s) / f6| 0.077 0.077 0.077 0.078 0.078 0.078 0.076 0.000 0.000

[0162] Table 9

[0163] This application also provides an imaging device equipped with an electronic photosensitive element for imaging. The electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) device. The imaging device can be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical lens described above.

[0164] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of protection involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the concept of this application. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens, comprising a lens barrel and a lens group and a plurality of spacer elements housed within the lens barrel, characterized in that, The lens group includes 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 positive optical power, and a sixth lens with negative optical power, arranged sequentially from the object side to the image side along the optical axis. The object-side surfaces of the first lens, the second lens, and the sixth lens are all convex, and the image-side surfaces are all concave. The object-side surface of the third lens is convex; the object-side surface of the fifth lens is convex, and both the image-side surfaces are convex. The plurality of spacers include: a second spacer located between the second lens and the third lens and abutting against the image-side surface of the second lens; a third spacer located between the third lens and the fourth lens and abutting against the image-side surface of the third lens; and a fifth spacer located between the fifth lens and the sixth lens and abutting against the image-side surface of the fifth lens. The optical lens has six lenses with optical power. The optical lens satisfies: 0.005≤(D3m-D2m) / TD≤0.330; 1.3<(R5+R4) / (R5-R4)≤1.646; -1.814≤f2 / (D3m+D2m)≤-1.267; and 22.525≤(d3m-d2m)×V2 / T23≤28.195; 1.6 < (d5m + d5s) / f5 ≤ 1.900; Wherein, D3m is the outer diameter of the image-side surface of the third spacer element, D2m is the outer diameter of the image-side surface of the second spacer element, TD is the distance from the object-side surface of the first lens to the image-side surface of the sixth lens on the optical axis, R5 is the radius of curvature of the object-side surface of the third lens, R4 is the radius of curvature of the image-side surface of the second lens, f2 is the effective focal length of the second lens, d3m is the inner diameter of the image-side surface of the third spacer element, d2m is the inner diameter of the image-side surface of the second spacer element, V2 is the dispersion coefficient of the second lens, T23 is the distance from the image-side surface of the second lens to the object-side surface of the third lens on the optical axis, d5m is the inner diameter of the image-side surface of the fifth spacer element, d5s is the inner diameter of the object-side surface of the fifth spacer element, and f5 is the effective focal length of the fifth lens.

2. The optical lens according to claim 1, characterized in that, The plurality of spacers further includes: a first spacer, located between the first lens and the second lens, and abutting against the image side of the first lens; The distance EP12 from the image side of the first spacer element to the object side of the second spacer element on the optical axis and the distance T12 from the image side of the first lens to the object side of the second lens on the optical axis satisfy the following: 2.992≤EP12 / T12≤3.

323.

3. The optical lens according to claim 1, characterized in that, The plurality of spacers further includes: a fourth spacer, located between the fourth lens and the fifth lens, and abutting against the image side of the fourth lens; The maximum thickness CP5 of the fifth spacer element along the optical axis, the distance EP45 from the image side of the fourth spacer element to the object side of the fifth spacer element on the optical axis, and the center thickness CT4 of the fourth lens on the optical axis satisfy the following: 1.418≤(CP5+EP45) / CT4≤3.

925.

4. The optical lens according to claim 1, characterized in that, The plurality of spacers further includes: a fourth spacer, located between the fourth lens and the fifth lens, and abutting against the image side of the fourth lens; The distance EP34 between the image-side surface of the third spacer element and the object-side surface of the fourth spacer element on the optical axis satisfies the following conditions: the effective focal length f4 of the fourth lens and the effective focal length f3 of the third lens. 0.01 <EP34 / (f4+f3)<0.03。 5. The optical lens according to claim 1, characterized in that, The maximum thickness CP2 of the second spacer element along the optical axis, the distance T34 from the image side of the third lens to the object side of the fourth lens along the optical axis, and the maximum thickness CP3 of the third spacer element along the optical axis satisfy the following: 31.669≤T23 / CP2+T34 / CP3≤34.

530.

6. The optical lens according to claim 1, characterized in that, The plurality of spacers further includes: a fourth spacer, located between the fourth lens and the fifth lens, and abutting against the image side of the fourth lens; The center thickness CT4 of the fourth lens on the optical axis, the refractive index N4 of the fourth lens, and the maximum thickness CP4 of the fourth spacer element along the optical axis satisfy the following: 15.910≤CT4×N4 / CP4≤30.

154.

7. The optical lens according to claim 1, characterized in that, The outer diameter D5m of the image-side surface of the fifth spacer element, the inner diameter d5m of the image-side surface of the fifth spacer element, and the distance T45 from the image-side surface of the fourth lens to the object-side surface of the fifth lens on the optical axis satisfy the following: 1.251≤(D5m-d5m) / T45≤4.

238.

8. The optical lens according to claim 1, characterized in that, The radius of curvature R10 of the image-side surface of the fifth lens and the radius of curvature R9 of the object-side surface of the fifth lens satisfy the following: 4.8 < (R10 - R9) / (R10 + R9) ≤ 5.047; and The outer diameter D5m of the image-side surface of the fifth spacer element and the inner diameter d5m of the image-side surface of the fifth spacer element satisfy the following: 1.092≤D5m / d5m≤1.

403.

9. The optical lens according to claim 1, characterized in that, The plurality of spacers further includes: a fourth spacer, located between the fourth lens and the fifth lens, and abutting against the image side of the fourth lens; The combined focal length f45 of the fourth lens and the fifth lens and the distance EP45 from the image side of the fourth spacer to the object side of the fifth spacer on the optical axis satisfy the following: 11.766≤f45 / EP45≤22.708; and The maximum thickness CP5 of the fifth spacer element along the optical axis direction and the maximum thickness CP4 of the fourth spacer element along the optical axis direction satisfy the following: 1.000≤CP5 / CP4<22.

2.

10. The optical lens according to claim 1, characterized in that, The plurality of spacers further includes: a sixth spacer, located on the image side of the sixth lens and abutting against the image side of the sixth lens; The inner diameter d6m of the image side of the sixth spacer element, the inner diameter d6s of the object side of the sixth spacer element, and the effective focal length f6 of the sixth lens satisfy the following: |(d6m-d6s) / f6|<0.

1.

11. The optical lens according to claim 1, characterized in that, The plurality of spacer elements also include: A fifth auxiliary spacer element is located between the fifth spacer element and the sixth lens.

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