Optical imaging lens

Abstract

The utility model provides an optical imaging lens. The optical imaging lens comprises a lens barrel, a lens group and a spacing element group, and the lens group is composed of six lenses which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens with negative focal power in sequence; the spacing element group comprises a first spacing element, a second spacing element, a third spacing element, a fourth spacing element and a fifth spacing element; the requirement of 3.2 lt is met; f < no > * tan (Semi-FOV) < lt >; 3.5); the requirement of 0.5 lt is met; cT1 / CT2lt; 0.75% by weight; the requirement of-11.5 lt is met; (EP12-f2) / (EP01-f1) lt; and 2.6. According to the utility model, the problem that the reflection stray light in the front-end lens is serious due to the fact that a six-piece optical imaging lens in the prior art meets the wide-angle requirement is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical imaging equipment technical field, specifically, relate to a kind of optical imaging lens. BACKGROUND

[0002] With the development of technology, wide-angle lens is attracting market attention due to its ability to provide a wider field of view. With the advancement of optical design and manufacturing technology, six-piece wide-angle lenses not only improve imaging quality and field of view, but also adapt to various shooting environments. However, in the design of existing six-piece wide-angle lenses, the size of the front lens is usually controlled, which can easily result in a large size difference of the front lens, leading to an increase in internal reflection stray light and a decrease in edge image quality.

[0003] That is, the six-piece optical imaging lens in the prior art has the problem of severe internal reflection stray light of the front lens to meet the wide-angle requirement. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide an optical imaging lens to solve the problem of severe internal reflection stray light of the front lens to meet the wide-angle requirement in the six-piece optical imaging lens in the prior art.

[0005] In order to achieve the above object, according to one aspect of the present application, an optical imaging lens is provided, comprising a lens barrel and a lens group and a spacer element group arranged in the lens barrel, the lens group is composed of six lenses, the six lenses are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens with negative optical power from the object side to the image side, there is an air gap between the adjacent two lenses among the first lens to the sixth lens; the spacer element group comprises a first spacer element arranged between the first lens and the second lens and in contact with the image side surface part of the first lens, a second spacer element arranged between the second lens and the third lens and in contact with the image side surface part of the second lens, a third spacer element arranged between the third lens and the fourth lens and in contact with the image side surface part of the third lens, a fourth spacer element arranged between the fourth lens and the fifth lens and in contact with the image side surface part of the fourth lens, and a fifth spacer element arranged between the fifth lens and the sixth lens and in contact with the image side surface part of the fifth lens; the maximum half field angle Semi-FOV of the optical imaging lens and the numerical aperture fno of the optical imaging lens satisfy: 3.2<fno*tan(Semi-FOV)<3.5; the central thickness CT1 of the first lens and the central thickness CT2 of the second lens satisfy: 0.5<CT1 / CT2<0.75; the axial distance EP12 from the image side surface of the first spacer element to the object side surface of the second spacer element, the axial distance EP01 from the object side surface of the lens barrel to the object side surface of the first spacer element, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -11.5<(EP12-f2) / (EP01-f1)<2.6.

[0006] According to another aspect of the utility model, provide a kind of optical imaging lens, including lens barrel and the lens group and spacer element group being arranged in lens barrel, lens group is made of six lenses, six lenses are sequentially from object side to image side as the first lens with negative optical power, the second lens with optical power, the third lens with positive optical power, the fourth lens with optical power, the fifth lens with optical power and the sixth lens with negative optical power, there is air gap between adjacent two lenses in first lens to sixth lens;Spacer element group includes the first spacer element being placed between first lens and second lens and with the image side surface portion of first lens contact, the second spacer element being placed between second lens and third lens and with the image side surface portion of second lens contact, the third spacer element being placed between third lens and fourth lens and with the image side surface portion of third lens contact, the fourth spacer element being placed between fourth lens and fifth lens and with the image side surface portion of fourth lens contact and the fifth spacer element being placed between fifth lens and sixth lens and with the image side surface portion of fifth lens contact;Between the maximum half field angle Semi-FOV of optical imaging lens and the numerical aperture fno of optical imaging lens, it satisfies: 3.2 < fno x tan (Semi-FOV) < 3.5;Between the center thickness CT1 of first lens and the center thickness CT2 of second lens, it satisfies: 0.5 < CT1 / CT2 < 0.75;Between the center thickness CP3 of third spacer element, the center thickness CP4 of fourth spacer element, the axial distance T34 from the image side of third lens to the object side of fourth lens and the axial distance T45 from the image side of fourth lens to the object side of fifth lens, it satisfies: 0.3 < (T34+T45) / (CP3+CP4) < 4.5.

[0007] According to the utility model discloses another aspect provides a kind of optical imaging lens, including lens barrel and the lens group and spacer element group being arranged in lens barrel, lens group is made of six lenses, six lenses are sequentially from object side to image side as the first lens with negative optical power, the second lens with optical power, the third lens with positive optical power, the fourth lens with optical power, the fifth lens with optical power and the sixth lens with negative optical power, there is air gap between adjacent two lenses in the first lens to the sixth lens;Spacer element group includes the first spacer element being placed between the first lens and the second lens and with the image side surface portion of the first lens contact, the second spacer element being placed between the second lens and the third lens and with the image side surface portion of the second lens contact, the third spacer element being placed between the third lens and the fourth lens and with the image side surface portion of the third lens contact, the fourth spacer element being placed between the fourth lens and the fifth lens and with the image side surface portion of the fourth lens contact and the fifth spacer element being placed between the fifth lens and the sixth lens and with the image side surface portion of the fifth lens contact;The inner diameter d0m of the image side surface of lens barrel and the entrance pupil diameter EPD of optical imaging lens satisfy: 2.3 < d0m / EPD < 3.6;The inner diameter d0m of the image side surface of lens barrel, the inner diameter d5m of the image side surface of the fifth spacer element and the effective focal length f6 of the sixth lens satisfy: -0.2 < (d0m-d5m) / f6 < 0.1.

[0008] Further, the axial distance EP01 of the object side surface of lens barrel to the object side surface of the first spacer element, the effective radius DT11 of the object side surface of the first lens and the effective radius DT12 of the image side surface of the first lens satisfy: 0.75 < (DT11-DT12) / EP01 < 0.95.

[0009] Further, the maximum axial height L of the object side surface of lens barrel to the image side surface of lens barrel and the axial distance EP03 of the object side surface of lens barrel to the object side surface of the third spacer element satisfy: 0.55 < EP03 / L < 0.7.

[0010] Further, the inner diameter d0m of the image side surface of lens barrel and the inner diameter d0s of the object side surface of lens barrel satisfy: 2 < d0s / d0m < 3.2.

[0011] Further, the axial distance EP12 of the image side surface of the first spacer element to the object side surface of the second spacer element and the center thickness CT2 of the second lens satisfy: 1 < EP12 / CT2 < 1.4.

[0012] Further, a central thickness CP3 of the third spacer element, a central thickness CP4 of the fourth spacer element, an on-axis distance T34 from an image side surface of the third lens to an object side surface of the fourth lens, and an on-axis distance T45 from the image side surface of the fourth lens to an object side surface of the fifth lens satisfy: 0.3 < (T34 + T45) / (CP3 + CP4) < 4.5.

[0013] Further, an on-axis distance EP34 from an image side surface of the third spacer element to an object side surface of the fourth spacer element, and an on-axis distance EP45 from an image side surface of the fourth spacer element to an object side surface of the fifth spacer element satisfy: 0.8 < EP34 / EP45 < 1.4.

[0014] Further, an inner diameter d4s of the object side surface of the fourth spacer element and an effective focal length f4 of the fourth lens satisfy: -0.7 < d4s / f4 < 1.25; and an inner diameter d5s of the object side surface of the fifth spacer element and an effective focal length f5 of the fifth lens satisfy: -0.65 < d5s / f5 < 1.35.

[0015] Further, the sixth lens has a negative refractive power, and an inner diameter d5m of the image side surface of the fifth spacer element and an effective focal length f6 of the sixth lens satisfy: -3.6 < f6 / d5m < -1.1.

[0016] Further, an inner diameter d4m of the image side surface of the fourth spacer element and a curvature radius R9 of the object side surface of the fifth lens satisfy: -2 < d4m / R9 < 1.25; and an inner diameter d5s of the object side surface of the fifth spacer element and a curvature radius R10 of the image side surface of the fifth lens satisfy: -1.45 ≤ d5s / R10 < -1.2.

[0017] Further, an outer diameter D0m of the image side surface of the lens barrel, an inner diameter d0m of the image side surface of the lens barrel, and an effective radius DT62 of the image side surface of the sixth lens satisfy: 1 < (D0m - d0m) / DT62 ≤ 2.1.

[0018] Further, a maximum axial height L from the object side surface of the lens barrel to the image side surface of the lens barrel and an entrance pupil diameter EPD of the optical imaging lens satisfy: 7.7 < L / EPD < 9.5.

[0019] The technical scheme of the utility model discloses, the optical imaging lens of the application is composed of a lens barrel and six lenses and multiple interval elements arranged in the lens barrel, by arranging the positions of the six lenses and the interval elements reasonably and setting the optical imaging lens to meet 3.2 < fno x tan (Semi-FOV) < 3.5 and 0.5 < CT1 / CT2 < 0.75, it is favorable to realize the wide-angle characteristic, guarantee that the optical imaging lens can obtain a larger field angle, and simultaneously have the characteristics of a large aperture, simultaneously control the central thickness of the first lens to be much smaller than the central thickness of the second lens, and the edge thickness of the second lens is relatively thick, so that the edge light of the ultra-wide-angle is easy to produce internal reflection stray light at the edge position of the first lens and the second lens when entering the second lens through the first lens, and the increase of the stray light leads to the decline of the edge image quality. Therefore, the application is favorable to guarantee that the shape of the first lens and the second lens is as gentle as possible, is favorable to control the edge thickness of the first lens and the second lens in a reasonable range, reduces the internal reflection stray light at the front end lens, and is favorable to improve the edge image quality. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings accompanying the specification of the application form a part of the application and serve to further provide a further understanding of the application, the illustrative embodiments of the application and the explanations thereof serve to explain the application without constituting an improper limitation of the application. In the drawings:

[0021] Figure 1 The size marking diagram of the optical imaging lens of one optional embodiment of the application is shown;

[0022] Figure 2 The structure schematic diagram of the optical imaging lens of embodiment 1-1 of the application is shown;

[0023] Figure 3 The structure schematic diagram of the optical imaging lens of embodiment 1-2 of the application is shown;

[0024] Figure 4 The structure schematic diagram of the optical imaging lens of embodiment 1-3 of the application is shown;

[0025] Figures 5 to 7 The on-axis chromatic aberration curve, the astigmatism curve and the distortion curve of the optical imaging lens of the embodiment of the application are shown respectively;

[0026] Figure 8 The structure schematic diagram of the optical imaging lens of embodiment 2-1 of the application is shown;

[0027] Figure 9 The structure schematic diagram of the optical imaging lens of embodiment 2-2 of the application is shown;

[0028] Figure 10 A structure schematic view of the optical imaging lens of the embodiment 2-3 of the present application is shown;

[0029] Figures 11 to 13 An on-axis chromatic aberration curve, an astigmatism curve and a distortion curve of the optical imaging lens of the embodiment two of the present application are shown respectively;

[0030] Figure 14 A structure schematic view of the optical imaging lens of the embodiment 3-1 of the present application is shown;

[0031] Figure 15 A structure schematic view of the optical imaging lens of the embodiment 3-2 of the present application is shown;

[0032] Figure 16 A structure schematic view of the optical imaging lens of the embodiment 3-3 of the present application is shown;

[0033] Figures 17 to 19 An on-axis chromatic aberration curve, an astigmatism curve and a distortion curve of the optical imaging lens of the embodiment three of the present application are shown respectively;

[0034] Figure 20 A stray light energy diagram of an optical imaging lens of one optional embodiment of the present application is shown when fno x tan (Semi-FOV) = 3.24, CT1 / CT2 = 0.51 and (EP12-f2) / (EP01-f1) = -6.10 are met;

[0035] Figure 21 A stray light energy diagram of an optical imaging lens of one optional example is shown when fno x tan (Semi-FOV) = 3.24, CT1 / CT2 = 0.51 and (EP12-f2) / (EP01-f1) = -13 are met;

[0036] Figure 22 A stray light energy diagram of an optical imaging lens of another optional example is shown when fno x tan (Semi-FOV) = 3.24, CT1 / CT2 = 0.51 and (EP12-f2) / (EP01-f1) = 3 are met.

[0037] Among them, the above drawings include the following reference signs:

[0038] P0, lens barrel; E1, first lens; S1, object side surface of the first lens; S2, image side surface of the first lens; E2, second lens; S3, object side surface of the second lens; S4, image side surface of the second lens; E3, third lens; S5, object side surface of the third lens; S6, image side surface of the third lens; E4, fourth lens; S7, object side surface of the fourth lens; S8, image side surface of the fourth lens; E5, fifth lens; S9, object side surface of the fifth lens; S10, image side surface of the fifth lens; E6, sixth lens; S11, object side surface of the sixth lens; S12, image side surface of the sixth lens; P1, first spacer element; P2, second spacer element; P3, third spacer element; P4, fourth spacer element; P5, fifth spacer element. DETAILED DESCRIPTION

[0039] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0041] In the present application, unless otherwise specified, the orientation words such as "upper, lower, top, bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves. Similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

[0042] It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0043] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for the convenience of explanation. Specifically, the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn strictly to scale.

[0044] In this text, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The determination of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in this field, and the positive or negative of the R value (R refers to the radius of curvature in the paraxial region, usually the R value on the lens database (lens data) in optical software) is used to judge the convexity and concavity. Taking 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; taking 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. In this application, the left side is the object side and the right side is the image side.

[0045] In order to solve the problem that the six-piece optical imaging lens in the prior art has serious internal reflection stray light in the front lens due to meeting the wide-angle requirement, the present utility model provides an optical imaging lens.

[0046] As Figures 1 to 22 shown, in an optional embodiment of the present application, the optical imaging lens includes a lens barrel and a lens group and a spacer element group disposed in the lens barrel. The lens group is composed of six lenses. The six lenses are, in order from the object side to the image side, a first lens with a negative optical power, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. There is an air gap between adjacent two of the first lens to the sixth lens; the spacer element group includes a first spacer element disposed between the first lens and the second lens and partially contacting the image side surface of the first lens, a second spacer element disposed between the second lens and the third lens and partially contacting the image side surface of the second lens, a third spacer element disposed between the third lens and the fourth lens and partially contacting the image side surface of the third lens, a fourth spacer element disposed between the fourth lens and the fifth lens and partially contacting the image side surface of the fourth lens, and a fifth spacer element disposed between the fifth lens and the sixth lens and partially contacting the image side surface of the fifth lens; the maximum half field angle Semi-FOV of the optical imaging lens and the numerical aperture fno of the optical imaging lens satisfy: 3.2 < fno × tan(Semi-FOV) < 3.5; the central thickness CT1 of the first lens and the central thickness CT2 of the second lens satisfy: 0.5 < CT1 / CT2 < 0.75; the axial distance EP12 from the image side surface of the first spacer element to the object side surface of the second spacer element, the axial distance EP01 from the object side surface of the lens barrel to the object side surface of the first spacer element, and the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -11.5 < (EP12 - f2) / (EP01 - f1) < 2.6.

[0047] The optical imaging lens of the present application is composed of a lens barrel and six lenses and a plurality of spacer elements arranged in the lens barrel. By reasonably arranging the positions of the six lenses and the spacer elements, and setting the optical imaging lens to satisfy 3.2 < fno x tan(Semi-FOV) < 3.5 and 0.5 < CT1 / CT2 < 0.75, the wide-angle characteristic is realized, the optical imaging lens can obtain a larger field of view angle, and has the characteristics of a large aperture. At the same time, the center thickness of the first lens is controlled to be much smaller than the center thickness of the second lens, and the edge thickness of the second lens is relatively thick. When the edge light of the ultra-wide angle passes through the first lens and enters the second lens, internal reflection stray light is easily generated at the edge position of the first lens and the second lens. The increase of the stray light leads to the decline of the edge image quality. Therefore, by limiting -11.5 < (EP12-f2) / (EP01-f1) < 2.6, the shape of the first lens and the second lens is as flat as possible, the edge thickness of the first lens and the second lens is controlled in a reasonable range, the internal reflection stray light at the front end of the lens is reduced, and the edge image quality is improved.

[0048] In addition, referring to Table 1, Figures 20 to 22 shown below, under the premise that the optical imaging lens satisfies fno x tan(Semi-FOV) = 3.24 and CT1 / CT2 = 0.51, Figure 20 the stray light energy diagram when the optical imaging lens satisfies (EP12-f2) / (EP01-f1) = -6.10 is shown, Figure 21 the stray light energy diagram when the optical imaging lens satisfies (EP12-f2) / (EP01-f1) = -13 is shown, Figure 22 the stray light energy diagram when the optical imaging lens satisfies (EP12-f2) / (EP01-f1) = 3 is shown.

[0049] from Figures 20 to 22It can be seen that when (EP12-f2) / (EP01-f1)=-6.10, the stray light energy is 0.03, which is in the threshold range, and the performance is better, which meets the design requirements. When (EP12-f2) / (EP01-f1)=-13, EP01 and EP12 are too small, the stray light energy is 0.08, which exceeds the threshold 0.05, and the performance is poor, which does not meet the design requirements. When (EP12-f2) / (EP01-f1)=3, EP01 and EP12 are too large, the stray light energy is 0.11, which exceeds the threshold 0.05, and the performance is poor, which does not meet the design requirements. It can be seen that when (EP12-f2) / (EP01-f1) is in the range of-11.5 to 2.6, the stray light energy of the optical imaging lens is the lowest. Therefore, by restricting-11.5<(EP12-f2) / (EP01-f1)<2.6, the shape of the first lens and the second lens is controlled to be as gentle as possible, which is beneficial to control the edge thickness of the first lens and the second lens in a reasonable range, reduce the internal reflection stray light at the front end of the lens, reduce the stray light energy, and improve the edge image quality.

[0050] Table 1

[0051] Example One Example Two Example Three (EP12-f2) / (EP01-f1) -13 -6.10 3 Stray light energy map Figure 21 Figure 20 Figure 22

[0052] In the embodiment, the axial distance EP01 from the object side surface of the lens barrel to the object side surface of the first spacer element, the effective radius DT11 of the object side surface of the first lens, and the effective radius DT12 of the image side surface of the first lens satisfy: 0.75<(DT11-DT12) / EP01<0.95. By controlling EP01 in a reasonable range, the total axial length of the optical imaging lens can be effectively reduced, and the convex situation of the object side surface of the first lens can be avoided; by controlling the effective radius of the first lens in a reasonable range, the forming difficulty of the first lens can be reduced, and the forming stability can be improved; by controlling the relationship between EP01 and the effective radius of the first lens, the size of the large end of the optical imaging lens can be controlled, which helps to improve the assembly stability of the front end of the optical imaging lens and improve the imaging quality.

[0053] In the embodiment, the maximum axial height L from the object side surface of the lens barrel to the image side surface of the lens barrel and the axial distance EP03 from the object side surface of the lens barrel to the object side surface of the third spacer element satisfy: 0.55<EP03 / L<0.7. By controlling the size ratio of the front end part of the optical imaging lens, the total axial length of the optical imaging lens can be better controlled, and the overall size of the optical imaging lens can be as small as possible; at the same time, the proportion of the center thickness of the first lens and the second lens and the gap can be ensured, so that the axial air gap of the first lens and the second lens can be effectively controlled in a reasonable range, the field curvature sensitivity can be reduced, and the assembly stability can be improved.

[0054] In the embodiment, the inner diameter d0m of the object side surface of the lens barrel and the inner diameter d0s of the image side surface of the lens barrel satisfy: 2 < d0s / d0m < 3.2. By controlling the ratio of the inner diameter of the object side surface of the lens barrel and the inner diameter of the image side surface of the lens barrel, the optical imaging lens can have a larger light flux, meet the requirement of a large field of view, and solve the problem of poor imaging quality of the edge field of view due to insufficient light; meanwhile, the light can be better converged on the imaging surface, and the imaging quality is improved.

[0055] In the embodiment, the axial distance EP12 from the image side surface of the first spacer element to the object side surface of the second spacer element and the center thickness CT2 of the second lens satisfy: 1 < EP12 / CT2 < 1.4. By controlling EP12 and CT2, the molding difficulty of the lens can be controlled, and the closer the ratio is to 1, the easier the lens is to mold; by controlling the above formula, the thickness uniformity of the second lens can be ensured, the molding difficulty of the second lens is reduced, the processing yield of the lens is improved, and the overall cost of the optical imaging lens is reduced.

[0056] In the embodiment, the center thickness CP3 of the third spacer element, the center thickness CP4 of the fourth spacer element, the axial distance T34 from the image side surface of the third lens to the object side surface of the fourth lens, and the axial distance T45 from the image side surface of the fourth lens to the object side surface of the fifth lens satisfy: 0.3 < (T34+T45) / (CP3+CP4) < 4.5. By controlling the center thickness of the spacer element and the air gap of the third lens and the fourth lens on the optical axis, the profile of the image side surface of the third lens and the object side surface of the fourth lens can be determined, which affects the optimization and improvement degree of the internal reflection stray light of the lens. By controlling the relationship through the above formula, the internal reflection stray light of the third lens and the fourth lens can be well controlled, and the imaging quality is improved.

[0057] In the embodiment, the axial distance EP34 from the image side surface of the third spacer element to the object side surface of the fourth spacer element and the axial distance EP45 from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element satisfy: 0.8 < EP34 / EP45 < 1.4. By controlling the axial distance from the image side surface of the third spacer element to the object side surface of the fourth spacer element and the axial distance from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element within a reasonable range, the thickness of the lens and the spacer element can be controlled to ensure the assembly stability; by the above formula, the edge thickness of the lens and the thickness of the spacer element are uniform, which is beneficial to improve the assembly stability.

[0058] In the embodiment, the inner diameter d4s of the object side surface of the fourth spacer element and the effective focal length f4 of the fourth lens satisfy: -0.7 < d4s / f4 < 1.25; the inner diameter d5s of the object side surface of the fifth spacer element and the effective focal length f5 of the fifth lens satisfy: -0.65 < d5s / f5 < 1.35. By controlling the two conditional expressions, the inner diameter of the spacer element and the effective focal length of the lens are ensured to be within a reasonable range, which can improve the molding process of the lens and ensure the assembly stability; by the above formula, the molding process of the fourth lens and the fifth lens can be improved, and the assembly stability can be improved.

[0059] In the embodiment, the sixth lens has a negative refractive power, the inner diameter d5m of the image side surface of the fifth spacer element and the effective focal length f6 of the sixth lens satisfy: -3.6 < f6 / d5m < -1.1. By controlling the inner diameter of the image side surface of the fifth spacer element and the effective focal length of the sixth lens within a reasonable range, it can be ensured that the fifth spacer element can effectively intercept stray light passing through the fifth lens without affecting the effective light passing through, and the possibility of invalid light passing through the sixth lens is minimized, the imaging quality is ensured, and the yield of stray light of the optical imaging lens is improved.

[0060] In the embodiment, the inner diameter d4m of the image side surface of the fourth spacer element and the radius of curvature R9 of the object side surface of the fifth lens satisfy: -2 < d4m / R9 < 1.25; the inner diameter d5s of the object side surface of the fifth spacer element and the radius of curvature R10 of the image side surface of the fifth lens satisfy: -1.45 ≤ d5s / R10 ≤ -1.2. By controlling the inner diameter of the spacer element and the radius of curvature of the lens within a reasonable range, it can be ensured that the spacer element can intercept stray light as much as possible without affecting the effective light passing through, and the imaging quality is improved; by the above formula, it can be ensured that the fourth spacer element and the fifth spacer element can effectively intercept stray light and ensure the imaging quality.

[0061] In the embodiment, the outer diameter D0m of the image side surface of the lens barrel, the inner diameter d0m of the image side surface of the lens barrel, and the effective radius DT62 of the image side surface of the sixth lens satisfy: 1 < (D0m-d0m) / DT62 ≤ 2.1. By the above formula, the thickness of the image side surface of the lens barrel can be controlled within a reasonable range, the molding difficulty is reduced, and the molding yield of the lens barrel is improved; at the same time, the size of the image side surface of the lens barrel can be controlled within a reasonable range, and the module assembly requirement is met.

[0062] In the embodiment, the maximum axial height L from the object side surface of the lens barrel to the image side surface of the lens barrel and the entrance pupil diameter EPD of the optical imaging lens satisfy: 7.7 < L / EPD < 9.5. By controlling the relationship between the maximum axial height from the object side surface of the lens barrel to the image side surface of the lens barrel and the entrance pupil diameter of the optical imaging lens within a reasonable range, the light flux of the first lens can be effectively controlled, the stray light generated by the first lens can be improved, and the yield of the optical imaging lens can be improved.

[0063] In the embodiment, the third lens has positive refractive power. The image side surface of the first lens is concave; the image side surface of the second lens is concave; the image side surface of the third lens is convex; the object side surface of the fourth lens is convex; the image side surface of the fifth lens is convex; and the image side surface of the sixth lens is concave. By reasonably constraining the refractive power and surface shape of each lens, the light path can be reasonably constrained, the light transition can be ensured to be smooth, the aberration can be corrected, and the imaging quality can be ensured.

[0064] Optionally, the optical imaging lens in the embodiment of the present application can be simulated by software and / or tools such as ZEMAX, CODEV, etc. In the process of simulation by software and / or tools such as the above, the surface shape of each lens can be simulated according to the surface shape provided by the software and / or tools used, and appropriate adjustment can be made.

[0065] In addition, in another optional embodiment of the present application, an optical imaging lens is also provided, comprising a lens barrel, a lens set and a spacer element set arranged in the lens barrel, the lens set is composed of six lenses, the six lenses are sequentially a first lens with negative refractive power, a second lens with refractive power, a third lens with positive refractive power, a fourth lens with refractive power, a fifth lens with refractive power and a sixth lens with negative refractive power from the object side to the image side, and there is an air gap between any two adjacent lenses among the first lens to the sixth lens; the spacer element set comprises a first spacer element arranged between the first lens and the second lens and in contact with the image side surface of the first lens, a second spacer element arranged between the second lens and the third lens and in contact with the image side surface of the second lens, a third spacer element arranged between the third lens and the fourth lens and in contact with the image side surface of the third lens, a fourth spacer element arranged between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens, and a fifth spacer element arranged between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens; the maximum half field angle Semi-FOV of the optical imaging lens and the numerical aperture fno of the optical imaging lens satisfy: 3.2 < fno x tan(Semi-FOV) < 3.5; the center thickness CT1 of the first lens and the center thickness CT2 of the second lens satisfy: 0.5 < CT1 / CT2 < 0.75; the center thickness CP3 of the third spacer element, the center thickness CP4 of the fourth spacer element, the axial distance T34 from the image side surface of the third lens to the object side surface of the fourth lens and the axial distance T45 from the image side surface of the fourth lens to the object side surface of the fifth lens satisfy: 0.3 < (T34+T45) / (CP3+CP4) < 4.5.

[0066] The optical imaging lens of the present application is composed of a lens barrel and six lenses and a plurality of spacer elements arranged in the lens barrel. By reasonably arranging the optical power of the six lenses, the positions of the spacer elements, and setting the optical imaging lens to satisfy 3.2 < fno x tan(Semi-FOV) < 3.5 and 0.5 < CT1 / CT2 < 0.75, the wide-angle characteristic is facilitated to be realized, the optical imaging lens can obtain a larger field of view angle, and meanwhile has the characteristic of a large aperture. Meanwhile, the central thickness of the first lens is controlled to be much smaller than the central thickness of the second lens, and the edge thickness of the second lens is relatively thick. Therefore, when the edge light of the ultra-wide angle passes through the first lens and enters the second lens, it is easy to produce internal reflection stray light at the edge position of the first lens and the second lens. The increase of the stray light leads to the decline of the edge image quality. Therefore, the present application is limited by 0.3 < (T34+T45) / (CP3+CP4) < 4.5. By controlling the central thickness of the spacer element and the air gap of the third lens and the fourth lens on the optical axis, the profile of the image side surface of the third lens and the object side surface of the fourth lens can be determined. This feature will affect the optimization and improvement degree of the internal reflection stray light of the lens. By controlling the relationship between the two through the above formula, the internal reflection stray light of the third lens and the fourth lens can be well controlled, and the imaging quality is improved.

[0067] Of course, other parameter formulas in the above embodiments can also be included in the present embodiment, which will not be described one by one here.

[0068] In addition, in another optional embodiment of the present application, an optical imaging lens is also provided. The optical imaging lens comprises a lens barrel and a lens group and a spacer element group arranged in the lens barrel. The lens group is composed of six lenses. The six lenses are sequentially a first lens with negative optical power, a second lens with optical power, a third lens with positive optical power, a fourth lens with optical power, a fifth lens with optical power, and a sixth lens with negative optical power from the object side to the image side. There is an air gap between any two adjacent lenses among the first lens to the sixth lens. The spacer element group comprises a first spacer element arranged between the first lens and the second lens and partially in contact with the image side surface of the first lens, a second spacer element arranged between the second lens and the third lens and partially in contact with the image side surface of the second lens, a third spacer element arranged between the third lens and the fourth lens and partially in contact with the image side surface of the third lens, a fourth spacer element arranged between the fourth lens and the fifth lens and partially in contact with the image side surface of the fourth lens, and a fifth spacer element arranged between the fifth lens and the sixth lens and partially in contact with the image side surface of the fifth lens. The inner diameter d0m of the image side surface of the lens barrel and the entrance pupil diameter EPD of the optical imaging lens satisfy: 2.3 < d0m / EPD < 3.6. The inner diameter d0m of the image side surface of the lens barrel, the inner diameter d5m of the image side surface of the fifth spacer element, and the effective focal length f6 of the sixth lens satisfy: -0.2 < (d0m-d5m) / f6 < 0.1.

[0069] The optical imaging lens of the present application is composed of a lens barrel and six lenses and a plurality of spacer elements arranged in the lens barrel. By reasonably arranging the optical power of the six lenses, the positions of the spacer elements, and setting the optical imaging lens to satisfy 2.3 < d0m / EPD < 3.6 and -0.2 < (d0m-d5m) / f6 < 0.1, it is beneficial to control the inner diameter of the image side surface of the lens barrel and the inner diameter of the image side surface of the fifth spacer element under the premise of realizing wide-angle characteristics and ensuring the amount of light, so as to ensure that the fifth spacer element can intercept the tail stray light, thereby ensuring the imaging quality.

[0070] Of course, other parameter formulas in the above embodiments can also be included in the present embodiment, which will not be described one by one here.

[0071] Optionally, the optical imaging lens described above can also include a protective glass for protecting the photosensitive element located on the imaging surface.

[0072] The optical imaging lens in the present application can adopt a plurality of lenses, for example, the six lenses described above. In the present application, at least one of the lens surfaces of each lens is a non-spherical lens surface. The characteristic of the aspherical lens is that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens which has a constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has better curvature radius characteristics, has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0073] However, those skilled in the art should understand that the number of lenses constituting the optical imaging lens can be changed without departing from the technical solutions claimed by the present application, to obtain the various results and advantages described in the present specification. For example, although six lenses are described as an example in the embodiments, the optical imaging lens is not limited to including six lenses. If necessary, the optical imaging lens can also include other numbers of lenses.

[0074] Figure 1 The size annotation diagram of one optical imaging lens of the present application is shown, Figure 1 The parameters d0s, d4m, d4s, d5s, d5m, d0m, D0m, EP01, EP03, EP12, EP34, EP45, CP3, CP4, L, etc. are marked in the figure, so that the meaning of the parameters can be clearly and intuitively understood. In order to facilitate the description of the optical imaging lens and the specific lens surface, these parameters will not be embodied in the figure when specific embodiments are described later.

[0075] The specific lens surface and parameter examples of the optical imaging lens applicable to the above embodiments will be further described below with reference to the drawings.

[0076] It should be noted that there are three examples of Example 1-1, Example 1-2, and Example 1-3 in the following Example One, three examples of Example 2-1, Example 2-2, and Example 2-3 in Example Two, and three examples of Example 3-1, Example 3-2, and Example 3-3 in Example Three. The curvature radius, center thickness, and other parameters of the first lens to the sixth lens of the optical imaging lens in the three examples in the same example are the same, but the thickness, inner diameter, and outer diameter of the lens barrel, the first spacing element to the fifth spacing element are different. Or, the main structure for imaging is the same, and the auxiliary structure for imaging is different.

[0077] It should be noted that any one of the following Examples One to Three is applicable to all embodiments of the present application.

[0078] Example One

[0079] As shown in Figures 2 to 7 , the optical imaging lens of Example One is described. Figure 2 shows a structural schematic diagram of the optical imaging lens of Example 1-1, Figure 3 shows a structural schematic diagram of the optical imaging lens of Example 1-2, Figure 4 shows a structural schematic diagram of the optical imaging lens of Example 1-3.

[0080] As shown in Figures 2 to 4 , the optical imaging lens includes a lens barrel P0 and a first lens E1, a first spacing element P1, a second lens E2, a second spacing element P2, a third lens E3, a third spacing element P3, a third auxiliary spacing element P3b, a fourth lens E4, a fourth spacing element P4, a fifth lens E5, a fifth spacing element P5, a fifth auxiliary spacing element P5b, and a sixth lens E6 arranged in the lens barrel P0 along the optical axis from the object side to the image side.

[0081] As shown in Figure 2As shown in FIG. 1A, it is a structure schematic diagram of the optical imaging lens of embodiment 1-1. In this example, the object side and image side of the first spacer element P1 are partially in contact with the image side S2 of the first lens and the object side S3 of the second lens respectively. The object side and image side of the second spacer element P2 are partially in contact with the image side S4 of the second lens and the object side S5 of the third lens respectively. The object side and image side of the third spacer element P3 are partially in contact with the image side S6 of the third lens and the object side of the third auxiliary spacer element P3b respectively, and the image side of the third auxiliary spacer element P3b is partially in contact with the object side S7 of the fourth lens. The object side and image side of the fourth spacer element P4 are partially in contact with the image side S8 of the fourth lens and the object side S9 of the fifth lens respectively. The object side and image side of the fifth spacer element P5 are partially in contact with the image side S10 of the fifth lens and the object side of the fifth auxiliary spacer element P5b respectively, and the image side of the fifth auxiliary spacer element P5b is partially in contact with the object side S11 of the sixth lens.

[0082] As shown in FIG. 1B, it is a structure schematic diagram of the optical imaging lens of embodiment 1-2. In this example, the abutting contact mode of each spacer element is the same as that of embodiment 1-1, and the related description in embodiment 1-1 can be referred to, which will not be repeated here. Figure 3 As shown in FIG. 1C, it is a structure schematic diagram of the optical imaging lens of embodiment 1-3. In this example, the abutting contact mode of each spacer element is the same as that of embodiment 1-1, and the related description in embodiment 1-1 can be referred to, which will not be repeated here.

[0083] As shown in FIG. 1B, it is a structure schematic diagram of the optical imaging lens of embodiment 1-2. In this example, the abutting contact mode of each spacer element is the same as that of embodiment 1-1, and the related description in embodiment 1-1 can be referred to, which will not be repeated here. Figure 4 As shown in FIG. 1C, it is a structure schematic diagram of the optical imaging lens of embodiment 1-3. In this example, the abutting contact mode of each spacer element is the same as that of embodiment 1-1, and the related description in embodiment 1-1 can be referred to, which will not be repeated here.

[0084] In summary, the structure parameters of the optical imaging lens of embodiment one under embodiment 1-1, embodiment 1-2, embodiment 1-3 are shown in Table 2. (unit: mm)

[0085] Table 2

[0086] Data / Examples 1-1 1-2 1-3 d4s 1.931 1.942 1.965 d4m 1.931 1.942 1.965 d5s 2.256 2.354 2.353 d5m 2.308 2.377 2.414 d0s 5.493 5.393 5.493 d0m 2.633 2.633 1.733 D0m 4.099 4.000 4.095 EP01 1.258 1.240 1.327 EP12 1.623 1.627 1.615 CP3 0.352 0.372 0.333 EP34 0.394 0.376 0.390 CP4 0.018 0.016 0.028 EP45 0.448 0.445 0.423 L 5.760 5.725 5.857 EP03 3.244 3.207 3.333

[0087] In embodiment one, the object side S1 of the first lens is concave, and the image side S2 of the first lens is concave. The object side S3 of the second lens is convex, and the image side S4 of the second lens is concave. The object side S5 of the third lens is concave, and the image side S6 of the third lens is convex. The object side S7 of the fourth lens is convex, and the image side S8 of the fourth lens is convex. The object side S9 of the fifth lens is concave, and the image side S10 of the fifth lens is convex. The object side S11 of the sixth lens is convex, and the image side S12 of the sixth lens is concave.

[0088] In the embodiment one, the effective focal length f1 of the first lens is -1.931 mm, the effective focal length f2 of the second lens is 20.972 mm, the effective focal length f3 of the third lens is 3.590 mm, the effective focal length f4 of the fourth lens is 1.607 mm, the effective focal length f5 of the fifth lens is -3.785 mm, and the effective focal length f6 of the sixth lens is -7.982 mm.

[0089] Table 3 shows the basic structure parameter table of the optical imaging lens of the embodiment one, wherein the units of the radius of curvature, the thickness / distance are millimeters (mm).

[0090] Table 3

[0091]

[0092]

[0093] In the embodiment one, the object side and the image side of the first lens E1 to the sixth lens E6 are aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0094]

[0095] wherein x is the distance from the vertex of the aspherical surface when the aspherical surface is at a height of h along the optical axis, h is the height of the aspherical surface, c is the paraxial curvature of the aspherical surface, c = 1 / R, i.e., the paraxial curvature c is the inverse of the radius of curvature R in Table 1 above, k is the conic coefficient, and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 4 below shows the high-order coefficient A4, A6, A8, A10, A12, A14, A16, A18, A20 which can be used for each aspherical surface S1-S12 in the embodiment one.

[0096] Table 4

[0097]

[0098]

[0099] Figure 5 The axial chromatic aberration curve of the optical imaging lens of the embodiment one is shown, which represents the convergence point deviation of light rays of different wavelengths after passing through the imaging lens. Figure 6 The astigmatism curve of the optical imaging lens of the embodiment one is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 7 The distortion curve of the optical imaging lens of the embodiment one is shown, which represents the distortion size value corresponding to different field angles.

[0100] According to Figures 5 to 7 It can be seen that the optical imaging lens given in the embodiment one can achieve good imaging quality.

[0101] Embodiment Two

[0102] As shown in Table 2, optical imaging lenses of embodiment two are described. Figures 8 to 13 Figure 8 A structure diagram of the optical imaging lens of embodiment 2-1 is shown in Table 2. Figure 9 A structure diagram of the optical imaging lens of embodiment 2-2 is shown in Table 2. Figure 10 A structure diagram of the optical imaging lens of embodiment 2-3 is shown in Table 2.

[0103] As shown in Table 2, optical imaging lenses of embodiment two are described. Figures 8 to 10 The optical imaging lens comprises a lens barrel P0 and, arranged in the lens barrel P0 in sequence from the object side to the image side along the optical axis, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, and a sixth lens E6.

[0104] As shown in Table 2, optical imaging lenses of embodiment two are described. Figure 8 A structure diagram of the optical imaging lens of embodiment 2-1 is shown in Table 2. In this example, the object side surface and the image side surface of the first spacer P1 are partially in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens respectively. The object side surface and the image side surface of the second spacer P2 are partially in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens respectively. The object side surface and the image side surface of the third spacer P3 are partially in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens respectively. The object side surface and the image side surface of the fourth spacer P4 are partially in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens respectively. The object side surface and the image side surface of the fifth spacer P5 are partially in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens respectively.

[0105] As shown in Table 2, optical imaging lenses of embodiment two are described. Figure 9 A structure diagram of the optical imaging lens of embodiment 2-2 is shown in Table 2. In this example, the abutting contact modes of the spacers are the same as those of embodiment 2-1, and reference can be made to the related description in embodiment 2-1, which will not be described herein.

[0106] As shown in Table 2, optical imaging lenses of embodiment two are described. Figure 10 A structure diagram of the optical imaging lens of embodiment 2-3 is shown in Table 2. In this example, the abutting contact modes of the spacers are the same as those of embodiment 2-1, and reference can be made to the related description in embodiment 2-1, which will not be described herein.

[0107] In summary, the structure parameters of the optical imaging lenses of embodiment two in embodiments 2-1, 2-2, and 2-3 are shown in Table 5. (unit: mm)

[0108] Table 5 ​

[0109]

[0110]

[0111] In embodiment two, the object side S1 of the first lens is convex, the image side S2 of the first lens is concave. The object side S3 of the second lens is concave, the image side S4 of the second lens is concave. The object side S5 of the third lens is convex, the image side S6 of the third lens is convex. The object side S7 of the fourth lens is convex, the image side S8 of the fourth lens is convex. The object side S9 of the fifth lens is convex, the image side S10 of the fifth lens is convex. The object side S11 of the sixth lens is concave, the image side S12 of the sixth lens is concave.

[0112] In embodiment two, the effective focal length f1 of the first lens is -1.591 mm, the effective focal length f2 of the second lens is -5.613 mm, the effective focal length f3 of the third lens is 1.533 mm, the effective focal length f4 of the fourth lens is 3.692 mm, the effective focal length f5 of the fifth lens is 1.977 mm, the effective focal length f6 of the sixth lens is -1.709 mm.

[0113] Table 6 shows the basic structure parameter table of the optical imaging lens of embodiment two, wherein the units of the radius of curvature, thickness / distance are millimeters mm.

[0114] Table 6

[0115]

[0116]

[0117] The following table 7 gives the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22 which can be used for each aspherical surface S1-S12 in embodiment two.

[0118] Table 7

[0119] Face number A4 A6 A8 A10 A12 S1 6.2789E-02 -4.8867E-02 2.9838E-02 -1.2274E-02 3.2456E-03 S2 1.0113E-01 -2.7001E-02 -6.9259E-02 2.0378E-01 -2.3110E-01 S3 -2.6467E-01 -1.4330E-01 -5.2572E-01 1.4064E+00 -2.3712E+00 S4 -6.7525E-02 5.3461E-02 -1.1058E-02 -6.2151E-03 3.1421E-02 S5 -1.8253E-15 6.7161E-14 -9.7058E-13 6.9595E-12 -2.6484E-11 S6 1.7961E-01 4.0151E-01 -4.8213E+00 2.8053E+01 -9.5788E+01 S7 -1.3791E-01 5.6677E-02 -3.9872E-01 8.1431E-01 -7.1680E-01 S8 -1.4200E-02 -3.0401E-02 2.7599E-04 1.9052E-02 -1.3202E-02 S9 1.9583E-01 -2.0701E-01 1.9027E-01 -1.1420E-01 3.8424E-02 S10 1.8436E-01 -1.8937E-03 3.8040E-02 -1.2061E-01 1.5982E-01 S11 -4.0061E-01 5.8724E-01 -7.9034E-01 5.8586E-01 -2.0918E-01 S12 -3.3406E-01 4.5318E-01 -4.9614E-01 3.6255E-01 -1.5633E-01 Face number A14 A16 A18 A20 A22 S1 -4.9130E-04 3.2383E-05 2.9360E-08 0.0000E+00 0.0000E+00 S2 1.3765E-01 -4.2373E-02 1.1451E-02 -4.1330E-03 0.0000E+00 S3 2.5898E-02 2.1551E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -4.7979E-02 1.8804E-02 0.0000E+00 0.0000E+00 0.0000E+00 S5 5.1546E-11 -4.0598E-11 0.0000E+00 0.0000E+00 0.0000E+00 S6 2.0479E+02 -2.7633E+02 2.2880E+02 -1.0618E+02 2.1181E+01 S7 3.2744E-01 -6.0475E-02 -2.0297E-03 0.0000E+00 0.0000E+00 S8 3.8876E-03 -4.0344E-04 -7.1214E-06 0.0000E+00 0.0000E+00 S9 -6.1460E-03 2.9529E-04 2.3337E-06 0.0000E+00 0.0000E+00 S10 -1.5659E-01 1.0976E-01 -4.2275E-02 6.7064E-03 0.0000E+00 S11 2.4772E-02 1.8601E-03 0.0000E+00 0.0000E+00 0.0000E+00 S12 3.5411E-02 -3.5112E-03 4.0746E-04 -1.1944E-04 0.0000E+00

[0120] Figure 11 The axial chromatic aberration curve of the optical imaging lens of embodiment two is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the imaging lens. Figure 12 The astigmatism curve of the optical imaging lens of embodiment two is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 13 The distortion curve of the optical imaging lens of embodiment two is shown, which represents the distortion size value corresponding to different field angles.

[0121] According to Figures 11 to 13It can be seen that the optical imaging lens provided in Embodiment Two can achieve good imaging quality.

[0122] Embodiment Three

[0123] As shown in Figures 14 to 19 , an optical imaging lens of Embodiment Three is described. Figure 14 A structural schematic diagram of the optical imaging lens of Embodiment 3-1 is shown, Figure 15 A structural schematic diagram of the optical imaging lens of Embodiment 3-2 is shown, Figure 16 A structural schematic diagram of the optical imaging lens of Embodiment 3-3 is shown.

[0124] As shown in Figures 14 to 16 , the optical imaging lens includes a lens barrel P0 and, arranged in the lens barrel P0 in order from the object side to the image side along the optical axis, a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a second auxiliary spacer element P2b, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, and a sixth lens E6.

[0125] As shown in Figure 14 , a structural schematic diagram of the optical imaging lens of Embodiment 3-1 is shown. In this example, the object side surface and the image side surface of the first spacer element P1 are partially in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens, respectively. The object side surface and the image side surface of the second spacer element P2 are partially in contact with the image side surface S4 of the second lens and the object side surface of the second auxiliary spacer element P2b, respectively, and the image side surface of the second auxiliary spacer element P2b is partially in contact with the object side surface S5 of the third lens. The object side surface and the image side surface of the third spacer element P3 are partially in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, respectively. The object side surface and the image side surface of the fourth spacer element P4 are partially in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens, respectively. The object side surface and the image side surface of the fifth spacer element P5 are partially in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens, respectively.

[0126] As shown in Figure 15 , a structural schematic diagram of the optical imaging lens of Embodiment 3-2 is shown. In this example, the abutting contact modes of the spacer elements are the same as those in Embodiment 3-1, and reference can be made to the related description in Embodiment 3-1, which will not be repeated here.

[0127] As shown in Figure 16 , a structural schematic diagram of the optical imaging lens of Embodiment 3-3 is shown. In this example, the abutting contact modes of the spacer elements are the same as those in Embodiment 3-1, and reference can be made to the related description in Embodiment 3-1, which will not be repeated here.

[0128] In summary, the optical imaging lens of Example Three has the structure parameters shown in Table 8 under the structures of Example 3-1, Example 3-2, and Example 3-3. (unit: mm)

[0129] Table 8

[0130] Data / Examples 3-1 3-2 3-3 d4s 2.042 2.042 2.021 d4m 2.042 2.042 2.021 d5s 1.996 2.035 2.044 d5m 1.996 2.035 2.044 d0s 4.941 5.041 5.141 d0m 2.291 2.441 2.490 D0m 3.528 3.575 3.696 EP01 1.252 1.272 1.240 EP12 0.829 0.811 0.829 CP3 0.018 0.016 0.022 EP34 0.754 0.785 0.751 CP4 0.018 0.016 0.022 EP45 0.576 0.574 0.553 L 5.481 5.562 5.530 EP03 3.270 3.252 3.714

[0131] In Example Three, the object side S1 of the first lens is a concave surface, and the image side S2 of the first lens is a concave surface. The object side S3 of the second lens is a concave surface, and the image side S4 of the second lens is a convex surface. The object side S5 of the third lens is a convex surface, and the image side S6 of the third lens is a convex surface. The object side S7 of the fourth lens is a convex surface, and the image side S8 of the fourth lens is a concave surface. The object side S9 of the fifth lens is a convex surface, and the image side S10 of the fifth lens is a convex surface. The object side S11 of the sixth lens is a convex surface, and the image side S12 of the sixth lens is a concave surface.

[0132] In Example Three, the effective focal length f1 of the first lens is -1.801 mm, the effective focal length f2 of the second lens is 35.548 mm, the effective focal length f3 of the third lens is 1.889 mm, the effective focal length f4 of the fourth lens is -2.995 mm, the effective focal length f5 of the fifth lens is 1.562 mm, and the effective focal length f6 of the sixth lens is -3.726 mm.

[0133] Table 9 shows the basic structure parameter table of the optical imaging lens of Example Three, wherein the units of the curvature radius, thickness / distance are all millimeters mm.

[0134] Table 9

[0135]

[0136] The following Table 10 gives the high-order term coefficients A4, A6, A8, A10, A12, A14, A16 of the aspherical surfaces S1-S12 that can be used in Example Three.

[0137] Table 10

[0138]

[0139]

[0140] Figure 17 The on-axis chromatic aberration curve of the optical imaging lens of Example Three is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the imaging lens. Figure 18 The astigmatism curve of the optical imaging lens of Example Three is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 19The distortion curves of the optical imaging lens of embodiment three are shown, which represent the distortion size values corresponding to different field angles.

[0141] According to Figures 17 to 19 It can be known that the optical imaging lens given by embodiment three can achieve good imaging quality.

[0142] In summary, embodiments one to three respectively satisfy the relationships shown in table 11.

[0143] Table 11

[0144] Conditional / Examples 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 fno x tan (Semi-FOV) 3.24 3.24 3.24 3.39 3.39 3.39 3.44 3.44 3.44 CT1 / CT2 0.51 0.51 0.51 0.71 0.71 0.71 0.62 0.62 0.62 (EP12-f2) / (EP01-f1) -6.07 -6.10 -5.94 2.51 2.55 2.50 -11.37 -11.30 -11.42 (DT11-DT12) / EP01 0.82 0.84 0.78 0.90 0.92 0.88 0.87 0.85 0.87 EP03 / L 0.56 0.56 0.57 0.62 0.61 0.61 0.60 0.58 0.67 d0s / d0m 2.09 2.05 3.17 2.77 2.71 2.63 2.16 2.07 2.06 EP12 / CT2 1.35 1.36 1.35 1.16 1.20 1.20 1.02 1.00 1.02 (T34+T45) / (CP3+CP4) 0.37 0.36 0.38 1.67 1.88 1.36 3.84 4.32 3.14 EP34 / EP45 0.88 0.84 0.92 0.90 0.90 0.90 1.31 1.37 1.36 d4s / f4 1.20 1.21 1.22 0.38 0.39 0.38 -0.68 -0.68 -0.67 d5s / f5 -0.60 -0.62 -0.62 0.72 0.72 0.73 1.28 1.30 1.31 f6 / d5m -3.46 -3.36 -3.31 -1.20 -1.20 -1.18 -1.87 -1.83 -1.82 d4m / R9 -1.95 -1.96 -1.99 0.12 0.13 0.12 1.22 1.22 1.21 d5s / R10 -1.27 -1.33 -1.32 -1.21 -1.21 -1.23 -1.41 -1.44 -1.45 (D0m-d0m) / DT62 1.31 1.22 2.10 1.85 1.88 1.88 1.19 1.09 1.16 L / EPD 7.83 7.78 7.96 9.02 9.13 9.41 7.75 7.87 7.82 d0m / EPD 3.58 3.58 2.35 3.27 3.41 3.59 3.24 3.45 3.52 (d0m-d5m) / f6 -0.04 -0.03 0.09 -0.10 -0.14 -0.18 -0.08 -0.11 -0.12

[0145] Table 12 shows the effective focal length and the like of each lens of the optical imaging lens of embodiments one to three.

[0146] Table 12

[0147]

[0148]

[0149] The present application also provides an imaging device, and the electronic photosensitive element thereof can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a separate imaging equipment such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0150] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0151] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, they indicate the presence of the features, steps, operations, devices, components and / or combinations thereof.

[0152] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0153] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An optical imaging lens, characterized in that, The optical imaging lens comprises a lens barrel, a lens group and a spacer element group arranged in the lens barrel, The lens group is composed of six lenses, which are, in order from the object side to the image side, a first lens with negative refractive power, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, and there is an air gap between adjacent two of the first to sixth lenses; The spacer element group comprises a first spacer element arranged between the first lens and the second lens and in contact with the image side surface portion of the first lens, a second spacer element arranged between the second lens and the third lens and in contact with the image side surface portion of the second lens, a third spacer element arranged between the third lens and the fourth lens and in contact with the image side surface portion of the third lens, a fourth spacer element arranged between the fourth lens and the fifth lens and in contact with the image side surface portion of the fourth lens, and a fifth spacer element arranged between the fifth lens and the sixth lens and in contact with the image side surface portion of the fifth lens; The maximum half field angle Semi-FOV of the optical imaging lens and the numerical aperture fno of the optical imaging lens satisfy: 3.2 < fno x tan (Semi-FOV) < 3.5; the central thickness CT1 of the first lens and the central thickness CT2 of the second lens satisfy: 0.5 < CT1 / CT2 < 0.75; the on-axis distance EP12 from the image side surface of the first spacer element to the object side surface of the second spacer element, the on-axis distance EP01 from the object side surface of the lens barrel to the object side surface of the first spacer element, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -11.5 < (EP12-f2) / (EP01-f1) < 2.

6. 2.The optical imaging lens according to claim 1, wherein, The on-axis distance EP01 from the object side surface of the lens barrel to the object side surface of the first spacer element, the effective radius DT11 of the object side surface of the first lens and the effective radius DT12 of the image side surface of the first lens satisfy: 0.75 < (DT11-DT12) / EP01 < 0.

95. 3.The optical imaging lens according to claim 1, wherein, The maximum axial height L from the object side surface of the lens barrel to the image side surface of the lens barrel and the on-axis distance EP03 from the object side surface of the lens barrel to the object side surface of the third spacer element satisfy: 0.55 < EP03 / L < 0.

7. 4.The optical imaging lens according to claim 1, wherein, The inner diameter d0m of the image side surface of the lens barrel and the inner diameter d0s of the object side surface of the lens barrel satisfy: 2 < d0s / d0m < 3.

2.

5. The optical imaging lens according to claim 1, characterized in that, The on-axis distance EP12 from the image side surface of the first spacer element to the object side surface of the second spacer element and the central thickness CT2 of the second lens satisfy: 1 < EP12 / CT2 < 1.

4. 6.The optical imaging lens according to claim 1, wherein, A center thickness CP3 of the third spacer element, a center thickness CP4 of the fourth spacer element, an on-axis distance T34 from an image side surface of the third lens to an object side surface of the fourth lens, and an on-axis distance T45 from an image side surface of the fourth lens to an object side surface of the fifth lens satisfy: 0.3 < (T34 + T45) / (CP3 + CP4) < 4.

5. 7.The optical imaging lens according to claim 1, wherein, An on-axis distance EP34 from an image side surface of the third spacer element to an object side surface of the fourth spacer element, and an on-axis distance EP45 from an image side surface of the fourth spacer element to an object side surface of the fifth spacer element satisfy: 0.8 < EP34 / EP45 < 1.

4. 8.The optical imaging lens according to claim 1, wherein, An inner diameter d4s of the object side surface of the fourth spacer element and an effective focal length f4 of the fourth lens satisfy: -0.7 < d4s / f4 < 1.25; and an inner diameter d5s of the object side surface of the fifth spacer element and an effective focal length f5 of the fifth lens satisfy: -0.65 < d5s / f5 < 1.

35. 9.The optical imaging lens according to claim 1, wherein, The sixth lens has negative refractive power, an inner diameter d5m of the image side surface of the fifth spacer element and an effective focal length f6 of the sixth lens satisfy: -3.6 < f6 / d5m < -1.

1. 10.The optical imaging lens according to claim 1, wherein, An inner diameter d4m of the image side surface of the fourth spacer element and a radius of curvature R9 of the object side surface of the fifth lens satisfy: -2 < d4m / R9 < 1.25; and an inner diameter d5s of the object side surface of the fifth spacer element and a radius of curvature R10 of the image side surface of the fifth lens satisfy: -1.45 ≤ d5s / R10 < -1.

2. 11.The optical imaging lens according to claim 1, wherein, An outer diameter D0m of the image side surface of the lens barrel, an inner diameter d0m of the image side surface of the lens barrel, and an effective radius DT62 of the image side surface of the sixth lens satisfy: 1 < (D0m - d0m) / DT62 ≤ 2.

1. 12.The optical imaging lens according to claim 1, wherein, A maximum axial height L from an object side surface of the lens barrel to an image side surface of the lens barrel and an entrance pupil diameter EPD of the optical imaging lens satisfy: 7.7 < L / EPD < 9.5.

Images