Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises a lens barrel and a lens set assembled in the lens barrel. The lens set comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence from an object side to an image side along an optical axis. The first lens to the sixth lens are all in contact with the inner wall of the lens barrel. The first lens and the fourth lens both have negative refractive power. The object side surface and the image side surface of the third lens are both convex. A first spacing element is arranged between the first lens and the second lens. A second spacing element is arranged between the second lens and the third lens. And 2.5 < d1s / d2s + T12 / CT1 < 5.5, wherein d1s is the inner diameter of the object side of the first spacing element, d2s is the inner diameter of the object side of the second spacing element, T12 is the air spacing of the first lens and the second lens on the optical axis, and CT1 is the center thickness of the first lens on the optical axis.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical elements, and in particular to an optical imaging lens comprising six lenses. BACKGROUND

[0002] In recent years, with the rapid development of technology, mobile and portable electronic devices such as smart phones have been rapidly popularized. The trend of smart phones and other electronic devices towards high performance and high quality is increasingly evident, which forces users to have higher and higher requirements for optical imaging lenses applied to the above-mentioned smart phones and other electronic devices. For optical imaging lenses on smart phones, wide-angle lenses with a large field of view are more popular with users, but wide-angle lenses are prone to multi-angle stray light. Wide-angle lenses generally have large front lenses and an overall convex shape. Due to the requirement of miniaturization, the proportion of the non-effective lens part of the front lens is small, and the design of the lens barrel requires high stability.

[0003] Therefore, how to provide an optical imaging lens to reduce the stray light of the optical imaging lens and improve the optical stability to meet the imaging quality requirements of the imaging lens is a problem to be solved for current optical imaging lens products. SUMMARY

[0004] The present application provides an optical imaging lens that can at least solve or partially solve at least one of the above-mentioned disadvantages in the prior art.

[0005] An aspect of the present application provides an optical imaging lens, which comprises a lens barrel and a lens group assembled in the lens barrel. The lens group comprises, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens to the sixth lens are all in contact with the inner wall of the lens barrel. The first lens and the fourth lens both have negative refractive power. The object side surface and the image side surface of the third lens are both convex. A first spacer element is arranged between the first lens and the second lens. A second spacer element is arranged between the second lens and the third lens. And 2.5 < d1s / d2s + T12 / CT1 < 5.5, wherein d1s is the inner diameter of the first spacer element close to the object side, d2s is the inner diameter of the second spacer element close to the object side, T12 is the air gap of the first lens and the second lens on the optical axis, and CT1 is the center thickness of the first lens on the optical axis.

[0006] According to an example embodiment of the present application, the outer diameter D0s of the end of the lens barrel close to the object side, the outer diameter D0M of the end of the lens barrel close to the image side, the maximum length L of the lens barrel, and the total effective focal length f of the lens group satisfy: 2mm -1 <(D0s+D0M) / (L×f)<3mm -1 .

[0007] According to an example embodiment of the present application, a third spacer element is arranged between the third lens and the fourth lens, and the inner diameter d3s of the third spacer element close to the object side, the outer diameter D3s of the third spacer element close to the object side, the central thickness CT3 of the third lens on the optical axis, and the radius of curvature R5 of the object side surface of the third lens satisfy: 0.2mm -1 <(D3s-d3s) / |CT3xR5|<3mm -1 .

[0008] According to an example embodiment of the present application, a fourth spacer element is arranged between the fourth lens and the fifth lens, and the distance EP34 between the third spacer element and the fourth spacer element and the central thickness CT4 of the fourth lens on the optical axis satisfy: 1.7<EP34 / CT4<2.3.

[0009] According to an example embodiment of the present application, the central thickness CT3 of the third lens on the optical axis, the radius of curvature R6 of the image side surface of the third lens, the outer diameter D2s of the second spacer element close to the object side, and the inner diameter d3s of the third spacer element close to the object side satisfy: 0<|CT3 / R6|x(D2s / d3s)<1.5.

[0010] According to an example embodiment of the present application, a fifth spacer element and a sixth spacer element are arranged between the fifth lens and the sixth lens, and the radius of curvature R10 of the image side surface of the fifth lens, the central thickness CT6 of the sixth lens on the optical axis, the inner diameter d6m of the sixth spacer element close to the image side, and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy: 0<|R10 / CT6|-d6m / DT61<0.8.

[0011] According to an example embodiment of the present application, the air interval T12 of the first lens and the second lens on the optical axis, the distance EP01 of the object side end surface of the lens barrel and the first spacer element on the optical axis, the maximum effective radius DT21 of the object side surface of the second lens, and the inner diameter d1s of the first spacer element close to the object side satisfy: 2<T12 / EP01+d1s / DT21<5.5.

[0012] According to an example embodiment of the present application, the minimum opening inner diameter ds of the lens barrel close to the object side, the air interval T12 of the first lens and the second lens on the optical axis, the outer diameter D0M of the end portion of the lens barrel close to the image side, the distance TD of the object side surface of the first lens to the image side surface of the sixth lens on the optical axis, and the aperture number fno of the optical imaging lens satisfy: 6<ds / T12+D0M / (TDxfno)<12.

[0013] According to an example embodiment of the present application, the outer diameter D1s of the first spacer element close to the object side, the inner diameter d1s of the first spacer element close to the object side, the inner diameter d2s of the second spacer element close to the object side, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, and the air gap T12 of the first lens and the second lens on the optical axis satisfy: 1 < D1s / (CT1+T12+CT2)-d1s / d2s < 3.5.

[0014] According to an example embodiment of the present application, the outer diameter Dns of the nth spacer element close to the object side in all the spacer elements and the central thickness CTn of the nth lens on the optical axis in all the lenses satisfy: 5 < Dns / CTn < 20, where n≤3.

[0015] Another aspect of the present application provides an optical imaging lens, which includes a lens barrel and a lens group assembled in the lens barrel, the lens group sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side along an optical axis, and any two adjacent lenses among the first lens to the sixth lens have an air gap; a first spacer element is arranged between the first lens and the second lens; a second spacer element is arranged between the second lens and the third lens; a third spacer element is arranged between the third lens and the fourth lens; and 5 < Dns / CTn < 20, where Dns is an outer diameter of the nth spacer element close to the object side in all the spacer elements, CTn is a central thickness of the nth lens on the optical axis in all the lenses, and n≤3.

[0016] According to an example embodiment of the present application, the first lens and the sixth lens have the same sign of focal power.

[0017] The optical imaging lens provided by the present application adopts a plurality of lenses, for example, the first lens to the sixth lens. Since the field of view of the ultra-wide-angle lens is large, the overall shape of the front lens is convex outward to the object side. Therefore, by reasonably controlling the mutual relationship between the inner diameter of the first spacer element close to the object side, the inner diameter of the second spacer element close to the object side, the air gap of the first lens and the second lens on the optical axis, and the central thickness of the first lens on the optical axis, the incident light rays can converge from the first lens to the second lens. The air gap of the first lens and the second lens on the optical axis leaves a large margin, which is conducive to improving the assembly stability of the first lens and the second lens. The first spacer element and the second spacer element are attached to the edge of the chief ray in the incident light rays, so that the first spacer element and the second spacer element effectively block stray light without affecting the above-mentioned chief ray, thereby improving the imaging quality of the optical imaging lens. BRIEF DESCRIPTION OF DRAWINGS

[0018] Other features, objects, and advantages of the application will become more apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings:

[0019] Figure 1 A structure schematic diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0020] Figures 2A-2B Axial chromatic aberration curves and astigmatism curves of the optical imaging lens of Embodiment 1 are shown respectively;

[0021] Figure 3 A structure schematic diagram of an optical imaging lens according to Embodiment 2 of the present application is shown;

[0022] Figures 4A-4B Axial chromatic aberration curves and astigmatism curves of the optical imaging lens of Embodiment 2 are shown respectively;

[0023] Figure 5 A structure schematic diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0024] Figures 6A-6B Axial chromatic aberration curves and astigmatism curves of the optical imaging lens of Embodiment 3 are shown respectively;

[0025] Figure 7 A structure schematic diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0026] Figures 8A-8B Axial chromatic aberration curves and astigmatism curves of the optical imaging lens of Embodiment 4 are shown respectively;

[0027] Figure 9 A structure schematic diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0028] Figures 10A-10B Axial chromatic aberration curves and astigmatism curves of the optical imaging lens of Embodiment 5 are shown respectively;

[0029] Figure 11 A structure schematic diagram of an optical imaging lens according to Embodiment 6 of the present application is shown;

[0030] Figures 12A-12B Axial chromatic aberration curves and astigmatism curves of the optical imaging lens of Embodiment 6 are shown respectively;

[0031] Figure 13 A size definition schematic diagram of an optical imaging lens according to the present embodiment is shown. DETAILED DESCRIPTION

[0032] For a better understanding of the present application, various aspects of the present application will be presented in more detail by reference to the attached drawings. It should be understood that these detailed description is merely a description of exemplary embodiments of the present application and is not intended in any way to limit the scope of the present application. Throughout the specification, like drawing reference numerals refer to like elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] It should be noted that the terms first, second, third, fourth, fifth, sixth and the like in the description merely denote different instances, and do not imply any limitation on the features. Thus, a first lens discussed below can also be termed as a second lens or a third lens or a fourth lens or a fifth lens or a sixth lens without departing from the teachings of the present application.

[0034] In the drawings, the thickness, size, and shape of the lenses have been exaggerated slightly for the sake of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0035] In this context, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is referred to as the object side surface of the lens, and the surface of each lens closest to the image plane is referred to as the image side surface of the lens.

[0036] It should also be understood that the use of the terms "include", "includes", "including", "has", "have", "having", "comprises", "comprising", or "contains" or "containing" when used in this specification, specifies the presence of stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or groups thereof. In addition, when describing the embodiments of the present application, the use of "may" indicates that "one or more embodiments of the present application". Also, the term "exemplary" is intended to refer to an example or illustration.

[0037] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that the terms should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0038] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0039] The features, principles and other aspects of the present application will be described in detail below.

[0040] The optical imaging lens according to the exemplary embodiments of the present application comprises a lens barrel and a lens group assembled in the lens barrel, and the lens group can comprise six lenses with optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The six lenses are arranged in order along an optical axis from an object side to an image side. The first lens to the sixth lens in the lens group are all in contact with the inner wall of the lens barrel, and the inner diameter of the lens barrel increases from the object side to the image side. In the first lens to the sixth lens, there can be an air gap between any two adjacent lenses.

[0041] In the exemplary embodiments, the first lens has negative optical power; the second lens has positive optical power; the third lens has positive optical power; the fourth lens has negative optical power; the fifth lens has positive optical power; and the sixth lens has negative optical power. Reasonable matching of the optical power and surface shape of each lens in the optical system can effectively balance the low-order aberration of the optical system and reduce the tolerance sensitivity.

[0042] In the exemplary embodiments, the object side surface of the second lens can be a convex surface.

[0043] In the exemplary embodiments, the object side surface of the third lens can be a convex surface, and the image side surface can be a convex surface.

[0044] In the exemplary embodiments, the image side surface of the fourth lens can be a convex surface, and the image side surface can be a concave surface.

[0045] In the exemplary embodiments, the object side surface of the fifth lens can be a convex surface, and the image side surface can be a convex surface.

[0046] In the exemplary embodiments, the image side surface of the sixth lens can be a convex surface, and the image side surface can be a concave surface.

[0047] In the exemplary embodiments, half of the maximum field of view angle Semi-FOV of the optical imaging lens satisfies Semi-FOV≥54°. Since the optical imaging lens has a large field of view angle, the first lens is configured to be convex outward to the object side, which can be used to converge the incident light after passing through the first lens; the second lens is relatively flat, which is conducive to the molding of the second lens and the smooth passing of the incident light. The air gap T12 of the first lens and the second lens on the optical axis satisfies T12≥0.3mm, which can leave a large margin for the air gap of the first lens and the second lens on the optical axis, and is conducive to improving the assembly stability of the first lens and the second lens.

[0048] In the example embodiment, the inner diameter dls of the first spacer element near the object side and the inner diameter d2s of the second spacer element near the object side satisfy: 1 < dls / d2s < 1.8. Reasonably controlling the mutual relationship between the inner diameter dls of the first spacer element near the object side and the inner diameter d2s of the second spacer element near the object side can enable the first spacer element and the second spacer element to adhere to the edge of the chief ray in the incident light, and enable the first spacer element and the second spacer element to effectively shield the generated stray light without affecting the chief ray.

[0049] In the example embodiment, the inner diameter dls of the first spacer element near the object side, the inner diameter d2s of the second spacer element near the object side, the air interval T12 of the first lens and the second lens on the optical axis, and the central thickness CT1 of the first lens on the optical axis satisfy: 2.5 < dls / d2s + T12 / CT1 < 5.5. In the example, 2.9 < dls / d2s + T12 / CT1 < 5.2. Reasonably controlling the mutual relationship between the inner diameter dls of the first spacer element near the object side, the inner diameter d2s of the second spacer element near the object side, the air interval T12 of the first lens and the second lens on the optical axis, and the central thickness CT1 of the first lens on the optical axis can enable the incident light to converge from the first lens to the second lens, the air interval T12 of the first lens and the second lens on the optical axis leaves a large margin, which is conducive to improving the assembly stability of the first lens and the second lens, and the first spacer element and the second spacer element adhere to the edge of the chief ray in the incident light, so that the first spacer element and the second spacer element effectively shield the generated stray light without affecting the chief ray.

[0050] In the example embodiment, the outer diameter D0s of the end of the lens barrel near the object side, the outer diameter D0M of the end of the lens barrel near the image side, the maximum length L of the lens barrel, and the total effective focal length f of the lens group satisfy: 2mm -1 <(D0s+D0M) / (L×f)<3mm -1 In the example, 2.2mm -1 <(D0s+D0M) / (L×f)≤2.9mm -1Reasonably controlling the mutual relationship among the outer diameter of the end of the lens barrel close to the object side, the outer diameter of the end of the lens barrel close to the image side, the maximum length of the lens barrel, and the total effective focal length of the lens group can make the outer diameter of the end of the lens barrel close to the object side and the outer diameter of the end of the lens barrel close to the image side as close as possible, so as to facilitate the molding of the lens barrel, while the maximum length of the lens barrel is coordinated with the design of the incident light rays of the optical imaging lens, to ensure that the lens barrel has sufficient thickness at the abutting position with the first lens without blocking the incident light rays, and to improve the assembly stability of the optical imaging lens. In an example, the outer diameter D0s of the end of the lens barrel close to the object side and the outer diameter D0M of the end of the lens barrel close to the image side satisfy: 1 < D0M / D0s < 1.1.

[0051] In an example embodiment, a third spacer element is arranged between the third lens and the fourth lens. Wherein, the inner diameter d3s of the third spacer element close to the object side, the outer diameter D3s of the third spacer element close to the object side, the central thickness CT3 of the third lens on the optical axis, and the curvature radius R5 of the object side surface of the third lens satisfy: 0.2 mm -1 <(D3s-d3s) / |CT3×R5|<3mm -1 In an example, 0.5 mm -1 <(D3s-d3s) / |CT3×R5|<2.9mm -1 The incident light rays converge between the second lens and the third lens, and then pass through the fourth lens, the fifth lens, and the sixth lens to the image side in a divergent manner. Reasonably controlling the inner diameter of the third spacer element close to the object side and the outer diameter of the third spacer element close to the object side can effectively block the generated stray light without affecting the chief ray in the incident light rays; reasonably controlling the central thickness of the third lens on the optical axis and the curvature radius of the object side surface of the third lens can ensure that the chief ray in the incident light rays passes through the third lens according to a predetermined path, and the face shape of the third lens is crucial for the imaging of the optical imaging lens, and reasonably controlling the face shape of the third lens can improve the imaging quality of the optical imaging lens.

[0052] In an example embodiment, a fourth spacer element is arranged between the fourth lens and the fifth lens. Wherein, the distance EP34 between the third spacer element and the fourth spacer element and the central thickness CT4 of the fourth lens on the optical axis satisfy: 1.7 < EP34 / CT4 < 2.3. In an example, 1.9 < EP34 / CT4 ≤ 2.15. Reasonably controlling the mutual relationship between the distance between the third spacer element and the fourth spacer element and the central thickness of the fourth lens on the optical axis can control the edge thickness of the fourth lens and the uniformity of the overall thickness of the fourth lens, which is conducive to the molding of the fourth lens and improves the assembly stability and imaging quality of the optical imaging lens.

[0053] In the example embodiments, the inner diameter d2s of the second spacer element close to the object side, the inner diameter d3s of the third spacer element close to the object side, the outer diameter D3s of the third spacer element close to the object side, the maximum effective radius DT32 of the image side surface of the third lens, and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy: 8.3 < D3s / DT42 + (d2s + d3s) / DT32 < 11.2. In the examples, 9 < D3s / DT42 + (d2s + d3s) / DT32 < 11.2. Reasonably controlling the mutual relationship between the inner diameter of the second spacer element close to the object side, the inner diameter of the third spacer element close to the object side, the outer diameter of the third spacer element close to the object side, the maximum effective radius of the image side surface of the third lens, and the maximum effective radius of the image side surface of the fourth lens can ensure that the second spacer element and the third spacer element effectively block stray light, and make the second spacer element and the third spacer element as close as possible to the edge of the chief ray, and the third spacer element close to the maximum effective radius of the image side surface of the third lens, so as to improve the imaging quality of the optical imaging lens. At the same time, since the outer diameter of the lens barrel increases from the object side to the image side, by controlling the ratio of the outer diameter of the third spacer element close to the object side to the maximum effective radius of the image side surface of the fourth lens, the uniformity of the lens barrel can be ensured, which is beneficial to improving the assembly stability of the optical imaging lens.

[0054] In the example embodiments, the central thickness CT3 of the third lens on the optical axis, the curvature radius R6 of the image side surface of the third lens, the outer diameter D2s of the second spacer element close to the object side, and the inner diameter d3s of the third spacer element close to the object side satisfy: 0 < |CT3 / R6| x (D2s / d3s) < 1.5. In the examples, 0.3 < |CT3 / R6| x (D2s / d3s) < 1.25. Reasonably controlling the mutual relationship between the central thickness of the third lens on the optical axis, the curvature radius of the image side surface of the third lens, the outer diameter of the second spacer element close to the object side, and the inner diameter of the third spacer element close to the object side can ensure that the incident light rays show a converging trend when passing through the second lens and a diverging trend when passing through the third lens; by controlling the ratio of the central thickness of the third lens on the optical axis to the curvature radius of the image side surface of the third lens, the reasonableness of the trend of the incident light rays when passing through the third lens can be ensured; by controlling the outer diameter of the second spacer element close to the object side and the inner diameter of the third spacer element close to the object side, the second spacer element and the third spacer element can effectively block stray light, and the imaging quality of the optical imaging lens is improved.

[0055] In the example embodiment, a fifth spacer element and a sixth spacer element are arranged between the fifth lens and the sixth lens. The radius of curvature R10 of the image side surface of the fifth lens, the central thickness CT6 of the sixth lens on the optical axis, the inner diameter d6m of the sixth spacer element close to the image side, and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy: 0<|R10 / CT6|-d6m / DT61<0.8. In the example, 0.1<|R10 / CT6|-d6m / DT61<0.7. Reasonably controlling the mutual relationship among the radius of curvature of the image side surface of the fifth lens, the central thickness of the sixth lens on the optical axis, the inner diameter of the sixth spacer element close to the image side, and the maximum effective radius of the object side surface of the sixth lens can effectively control the distance of the fifth lens and the sixth lens on the optical axis, and make the radius of curvature of the image side surface of the fifth lens larger, the central thickness of the sixth lens on the optical axis smaller, add the thickened fifth spacer element between the fifth lens and the sixth lens and cooperate with the two lenses, and control the inner diameter of the sixth spacer element close to the image side to block stray light, thereby improving the imaging quality of the optical imaging lens.

[0056] In the example embodiment, the air interval T12 of the first lens and the second lens on the optical axis, the distance EP01 of the object side end surface of the lens barrel and the first spacer element on the optical axis, the maximum effective radius DT21 of the object side surface of the second lens, and the inner diameter d1s of the first spacer element close to the object side satisfy: 2<T12 / EP01+d1s / DT21<5.5. Reasonably controlling the mutual relationship among the air interval of the first lens and the second lens on the optical axis, the distance of the object side end surface of the lens barrel and the first spacer element on the optical axis, the maximum effective radius of the object side surface of the second lens, and the inner diameter of the first spacer element close to the object side can ensure that the incident light converges between the second lens and the third lens through the first lens, the first lens is convex to the object side, the second lens is relatively flat, and the air interval of the first lens and the second lens on the optical axis is larger to ensure that the incident light converges smoothly. At the same time, the inner diameter of the first spacer element close to the object side is close to the maximum effective radius of the object side surface of the second lens, which can effectively block stray light and improve the imaging quality of the optical imaging lens.

[0057] In the example embodiment, the minimum opening inner diameter ds of the barrel near the object side, the air interval T12 of the first lens and the second lens on the optical axis, the outer diameter D0M of the end of the barrel near the image side, the distance TD of the object side surface of the first lens to the image side surface of the sixth lens on the optical axis, and the aperture number fno of the optical imaging lens satisfy: 6 < ds / T12 + D0M / (TD x fno) < 12. Reasonably controlling the mutual relationship between the minimum opening inner diameter of the barrel near the object side, the air interval of the first lens and the second lens on the optical axis, the outer diameter of the end of the barrel near the image side, the distance of the object side surface of the first lens to the image side surface of the sixth lens on the optical axis, and the aperture number of the optical imaging lens can ensure the rationality of the overall structure of the optical imaging lens, the distance of the object side surface of the first lens to the image side surface of the sixth lens on the optical axis is determined by the entire light path, and controlling the ratio of D0M to TD x fno can ensure the length-height ratio of the optical imaging lens and the rationality of the wall thickness of the barrel, thereby improving the forming rationality and assembly stability of the optical imaging lens.

[0058] In the example embodiment, the outer diameter D1s of the first spacer element near the object side, the inner diameter d1s of the first spacer element near the object side, the inner diameter d2s of the second spacer element near the object side, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, and the air interval T12 of the first lens and the second lens on the optical axis satisfy: 1 < D1s / (CT1 + T12 + CT2) - d1s / d2s < 3.5. Reasonably controlling the mutual relationship between the outer diameter of the first spacer element near the object side, the inner diameter of the first spacer element near the object side, the inner diameter of the second spacer element near the object side, the central thickness of the first lens on the optical axis, the central thickness of the second lens on the optical axis, and the air interval of the first lens and the second lens on the optical axis can effectively control the effective radius of curvature of the first lens, the second lens and the third lens, reasonably distribute the refractive power, improve the performance upper limit of the optical imaging lens, and ensure the wall thickness of each spacer element, thereby improving the uniformity of the spacer element and the overall structural strength. At the same time, it is beneficial to control the size of the spacer element, effectively block stray light, and improve the imaging quality of the optical imaging lens.

[0059] In the example embodiments, the outer diameter Dns of the nth interval element close to the object side in all interval elements and the center thickness CTn of the nth lens on the optical axis in all lenses satisfy: 5 < Dns / CTn < 20, n≤3. That is, 5 < D1s / CT1 < 20, 5 < D2s / CT2 < 20, 5 < D3s / CT3 < 20, where D1s is the outer diameter of the first interval element close to the object side, D2s is the outer diameter of the second interval element close to the object side, D3s is the outer diameter of the third interval element close to the object side, CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, and CT3 is the center thickness of the third lens on the optical axis. Reasonably controlling the mutual relationship between the outer diameter of the nth interval element close to the object side in all interval elements and the center thickness of the nth lens on the optical axis in all lenses can effectively control the ratio of the outer diameter to the center thickness of the lens and control the ratio to be between 5 and 20, ensuring the feasibility of forming the lens and avoiding the occurrence of gas trapping and welding marks. Controlling the ratio to be greater than 5 mainly ensures that the space inside the optical imaging lens is appropriate and has sufficient support, thereby improving the assembly stability of the optical imaging lens; controlling the ratio to be less than 20 mainly limits the length of the optical imaging lens, which is beneficial to lens demolding.

[0060] In the example embodiments, the optical imaging lens can further include a diaphragm to improve the relative luminance of the optical imaging lens. The diaphragm can be arranged at a suitable position according to actual needs. For example, the diaphragm can be arranged between the second lens and the third lens. Optionally, the optical imaging lens can further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive elements on the imaging surface.

[0061] The present application provides an optical imaging lens with a large field of view, which can reduce stray light and maintain good optical performance. The optical imaging lens according to the above embodiments of the present application can use multiple lenses, for example, six lenses as described above. By reasonably allocating the optical power, surface type, radius of curvature, center thickness, etc. of each lens, the incident light can be effectively converged between the second lens and the third lens, then transmitted in a diverging manner to the image side through the fourth lens, the fifth lens and the sixth lens, thereby reducing the total optical length of the optical imaging lens and improving the processability of the optical imaging lens, making the optical imaging lens more conducive to production and processing. At the same time, by controlling the inner diameter and outer diameter of each interval element close to the object side, stray light can be effectively blocked, and the imaging quality of the optical imaging lens can be improved.

[0062] In an exemplary embodiment, at least one of the mirror surfaces of the lenses is an aspherical mirror surface, i.e., at least one of the mirror surfaces of the object side surface of the first lens to the image side surface of the sixth lens is an aspherical mirror surface. The aspherical lens is characterized in that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens having a constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has a better curvature radius characteristic, having the advantages of improving the distortion aberration and improving the astigmatism aberration. After the aspherical lens is adopted, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Alternatively, at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens is an aspherical mirror surface. Alternatively, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are aspherical mirror surfaces.

[0063] However, those skilled in the art will understand that the number of lenses constituting the optical imaging lens can be changed without departing from the technical solutions claimed in 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.

[0064] The specific embodiments of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0065] Example 1

[0066] The following refers to Figures 1-2B The optical imaging lens according to Embodiment 1 of the present application is described below. Figure 1 is a structural schematic diagram showing the optical imaging lens according to Embodiment 1 of the present application.

[0067] As Figure 1 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side, a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a stop STO, 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, a sixth spacer element P6, a sixth lens E6, a filter, and an imaging surface S15.

[0068] The first lens E1 has negative focal power, the object side surface S1 is a concave surface, and the image side surface S2 is a concave surface. The second lens E2 has positive focal power, the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface. The third lens E3 has positive focal power, the object side surface S5 is a convex surface, and the image side surface S6 is a convex surface. The fourth lens E4 has negative focal power, the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface. The fifth lens E5 has positive focal power, the object side surface S9 is a convex surface, and the image side surface S10 is a convex surface. The sixth lens E6 has negative focal power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter has an object side surface S13 and an image side surface S14. Light from an object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0069] Table 1 shows the basic parameter table of the optical imaging lens of Example 1, wherein the units of the radius of curvature, the thickness and the focal length are all millimeters (mm).

[0070]

[0071] Table 1

[0072] In this embodiment, the total effective focal length of the optical imaging lens f = 1.05 mm, the maximum length of the lens barrel L = 3.36 mm, the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 TTL = 3.66 mm, half of the diagonal length of the effective pixel area on the imaging surface S15 ImgH = 1.91 mm, half of the maximum field of view angle of the optical imaging lens Semi-FOV = 62.32°, and the F number Fno = 2.38.

[0073] In Example 1, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces, and the surface type x of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0074]

[0075] wherein, x is the sag of the aspherical surface at a height 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 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 2 below shows the high-order term coefficients A4, A6, A8, A10 and A12 that can be used for each aspherical surface S1-S12 in Example 1. 10 12 14 16 18 20

[0076] ​​​​​​ Face Number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 6.7286E-01 -1.1962E-01 3.3497E-02 -1.0330E-02 3.4088E-03 -1.4505E-03 4.1143E-04 -1.2201E-04 2.8718E-05 S2 2.4430E-01 -8.3040E-02 -3.2975E-04 1.4644E-03 1.5102E-03 -1.8647E-04 -2.7651E-04 5.8412E-05 5.3310E-06 S3 -3.2552E-02 -5.0762E-03 1.9976E-03 1.4380E-04 -5.8995E-05 -2.8576E-05 1.1119E-05 -4.8680E-06 1.1029E-06 S4 -2.0983E-03 8.8850E-04 5.3027E-04 5.9017E-05 5.7745E-06 3.1614E-06 -3.3708E-06 -2.9815E-06 -1.7458E-06 S5 -1.1935E-03 -3.7621E-04 -6.0586E-05 -1.1202E-06 -2.3859E-07 2.0160E-06 -5.2207E-07 2.1625E-07 -3.3971E-08 S6 -5.9193E-02 -2.1435E-03 -1.1561E-03 -5.8181E-06 -4.7255E-05 1.5091E-05 -5.4964E-06 8.6286E-06 6.0626E-07 S7 -1.3613E-01 -4.4167E-04 -1.4846E-03 4.3354E-04 1.2959E-04 9.2593E-05 5.8410E-07 1.9156E-06 -2.3585E-06 S8 -1.9803E-01 2.2428E-02 -2.7481E-03 1.5600E-03 -1.6454E-04 1.4302E-04 -5.3720E-05 -4.8448E-06 7.6881E-07 S9 -7.5572E-02 3.0204E-03 -1.5324E-03 1.3694E-03 -3.4294E-04 2.2745E-04 -3.8423E-05 -3.4471E-05 8.7899E-06 S10 1.0856E-01 -4.9030E-02 1.7000E-02 -3.3231E-03 1.5074E-03 -1.4480E-03 3.7158E-04 3.2808E-05 -1.3223E-05 S11 -6.2937E-01 5.3677E-02 2.6143E-02 -5.3881E-04 -3.6716E-03 -1.7940E-03 1.0945E-03 2.0367E-04 -1.1682E-04 S12 -7.8932E-01 1.0020E-01 -1.5939E-02 1.0179E-02 -3.3600E-03 -8.3674E-04 -1.7389E-04 -8.2400E-05 1.5706E-04

[0077] Table 2

[0078] Figure 2A An on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the convergence point deviation of light rays of different wavelengths after passing through the lens. Figure 2B An astigmatism curve of the optical imaging lens of Embodiment 1 is shown, which represents the meridional image surface curvature and sagittal image surface curvature corresponding to different field angles. According to the astigmatism curve, the optical imaging lens of Embodiment 1 has a good astigmatism performance. Figures 2A-2B It can be seen that the optical imaging lens of Embodiment 1 can achieve good imaging quality.

[0079] Example 2

[0080] The optical imaging lens according to Embodiment 2 of the present application is described below with reference to the accompanying drawings. Figures 3-4B An on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the convergence point deviation of light rays of different wavelengths after passing through the lens. Figure 3 An astigmatism curve of the optical imaging lens of Embodiment 2 is shown, which represents the meridional image surface curvature and sagittal image surface curvature corresponding to different field angles. According to the astigmatism curve, the optical imaging lens of Embodiment 2 has a good astigmatism performance.

[0081] As shown in Figure 3 the optical imaging lens sequentially includes, along the optical axis from the object side to the image side, a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a stop STO, 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, a sixth spacer element P6, a sixth lens E6, a filter, and an imaging surface S15.

[0082] The first lens E1 has a negative refractive power, the object side surface S1 is a concave surface, and the image side surface S2 is a concave surface. The second lens E2 has a positive refractive power, the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface. The third lens E3 has a positive refractive power, the object side surface S5 is a convex surface, and the image side surface S6 is a convex surface. The fourth lens E4 has a negative refractive power, the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface. The fifth lens E5 has a positive refractive power, the object side surface S9 is a convex surface, and the image side surface S10 is a convex surface. The sixth lens E6 has a negative refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter has an object side surface S13 and an image side surface S14. Light from an object sequentially passes through each surface S1 to S14 and is finally imaged on the imaging surface S15.

[0083] In this embodiment, the total effective focal length of the optical imaging lens f = 1.05 mm, the maximum length of the lens barrel L = 3.36 mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 = 3.66 mm, half of the diagonal length of the effective pixel area on the imaging surface S15 ImgH = 1.91 mm, half of the maximum field angle of the optical imaging lens Semi-FOV = 62.32°, and the F-number Fno = 2.38.

[0084] Table 3 shows the basic parameters of the optical imaging lens of Example 2, where the units for radius of curvature, thickness, and focal length are millimeters (mm).

[0085]

[0086] Table 3

[0087] In Example 2, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 4 below shows the higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical mirror S1-S12 in Example 2. 10 A 12 A 14 A 16 A 18 and A 20 .

[0088]

[0089]

[0090] Table 4

[0091] Figure 4A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 4B The astigmatism curves of the optical imaging lens of Embodiment 2 are shown, representing the meridional and sagittal image plane curvatures corresponding to different field of view angles. According to... Figures 4A-4B It can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality.

[0092] Example 3

[0093] The following is for reference Figures 5-6B Describes an optical imaging lens according to Embodiment 3 of this application. Figure 5 A schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application is shown.

[0094] like Figure 5 As shown, the optical imaging lens includes, in sequence along the optical axis from the object side to the image side: a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, an aperture stop STO, 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, a sixth spacer element P6, a sixth lens E6, a filter, and an imaging surface S15.

[0095] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive 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 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. The filter has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0096] In this embodiment, the total effective focal length of the optical imaging lens is f = 1.20 mm, the maximum length of the lens barrel is L = 3.28 mm, the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 is TTL = 4.16 mm, half the diagonal length of the effective pixel area on the imaging surface S15 is ImgH = 1.91 mm, half the maximum field of view of the optical imaging lens is Semi-FOV = 57.39°, and the aperture number is Fno = 2.38.

[0097] Table 5 shows the basic parameters of the optical imaging lens of Example 3, where the units for radius of curvature, thickness, and focal length are millimeters (mm).

[0098]

[0099]

[0100] Table 5

[0101] In Example 3, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 6 below shows the higher-order coefficients A4, A6, A8, and A6 that can be used for each of the aspherical mirrors S1-S12 in Example 3. 10 A 12 A 14 A 16 A 18 and A 20 .

[0102] Face Number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 5.5130E-01 -9.8779E-02 3.1959E-02 -4.7148E-03 3.7871E-03 -1.0264E-03 3.8808E-04 -1.6643E-04 4.6818E-05 S2 2.1954E-01 -8.0884E-02 -1.1383E-02 -2.3004E-03 1.6143E-03 1.1074E-04 -3.1322E-04 -2.3303E-04 -9.6238E-05 S3 -3.1076E-02 -4.9550E-04 1.8444E-03 8.1558E-05 -1.3767E-04 -2.3993E-05 1.2924E-05 5.4742E-06 -5.9060E-07 S4 -6.8147E-03 4.9508E-04 3.7296E-04 -1.0432E-06 -6.2217E-06 -5.6186E-06 1.5899E-06 -1.1934E-06 4.4238E-07 S5 -1.7807E-03 -4.2682E-04 -4.8957E-05 -6.3891E-06 -1.1617E-06 -1.4399E-07 5.0069E-07 -2.6684E-07 3.6093E-08 S6 -5.6535E-02 -1.5746E-03 -6.9007E-04 -5.0799E-05 -3.6770E-05 -1.3823E-06 -2.2068E-06 1.4565E-07 -2.9372E-07 S7 -1.2007E-01 1.1490E-03 -5.6948E-04 2.8539E-04 -2.1136E-05 3.1064E-05 -7.5996E-06 3.5963E-06 -1.4681E-06 S8 -1.8595E-01 2.1374E-02 -2.6371E-03 1.0640E-03 -2.7965E-04 1.2064E-04 -5.1423E-05 1.4074E-05 -7.5276E-06 S9 -5.1676E-02 7.4869E-03 -2.1865E-03 1.1801E-03 -2.9572E-04 1.4683E-04 -3.3027E-05 7.0543E-06 -2.1556E-06 S10 8.4777E-02 -4.3971E-02 1.6746E-02 -3.1930E-03 2.4770E-03 -5.6603E-04 4.3519E-04 -6.0143E-05 1.9058E-05 S11 -4.1870E-01 3.3391E-02 6.7654E-03 1.3420E-03 -4.9844E-04 -5.8825E-04 6.0753E-04 -3.1694E-04 5.8834E-05 S12 -6.3861E-01 1.0050E-01 -2.3580E-02 1.2075E-02 -4.7238E-03 2.0138E-03 -1.0534E-03 3.6530E-05 3.5178E-05

[0103] Table 6

[0104] Figure 6A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 6BThe astigmatism curves of the optical imaging lens of Example 3 are shown, representing the meridional and sagittal image plane curvatures corresponding to different field of view angles. According to... Figures 6A-6B It can be seen that the optical imaging lens given in Example 3 can achieve good imaging quality.

[0105] Example 4

[0106] The following is for reference Figures 7-8B The optical imaging lens according to Embodiment 4 of this application is described. Figure 7 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown.

[0107] like Figure 7 As shown, the optical imaging lens includes, in sequence along the optical axis from the object side to the image side: a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, an aperture stop STO, 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, a sixth spacer element P6, a sixth lens E6, a filter, and an imaging surface S15.

[0108] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive 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 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. The filter has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0109] In this embodiment, the total effective focal length of the optical imaging lens is f = 1.20 mm, the maximum length of the lens barrel is L = 3.28 mm, the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 is TTL = 4.16 mm, half the diagonal length of the effective pixel area on the imaging surface S15 is ImgH = 1.91 mm, half the maximum field of view of the optical imaging lens is Semi-FOV = 57.39°, and the aperture number is Fno = 2.38.

[0110] Table 7 shows the basic parameters of the optical imaging lens of Example 4, where the units for radius of curvature, thickness, and focal length are millimeters (mm).

[0111]

[0112] Table 7

[0113] In Example 4, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 8 below shows the higher-order coefficients A4, A6, A8, and A6 that can be used for each of the aspherical mirrors S1-S12 in Example 4. 10 A 12 A 14 A 16 A 18 and A 20 .

[0114]

[0115]

[0116] Table 8

[0117] Figure 8A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 8B The astigmatism curves of the optical imaging lens of Example 4 are shown, representing the meridional and sagittal image plane curvatures corresponding to different field of view angles. According to... Figures 8A-8B It can be seen that the optical imaging lens given in Example 4 can achieve good imaging quality.

[0118] Example 5

[0119] The following is for reference Figures 9-10B Describes an optical imaging lens according to Embodiment 5 of this application. Figure 9 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown.

[0120] like Figure 9 As shown, the optical imaging lens includes, in sequence along the optical axis from the object side to the image side: a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, an aperture stop STO, 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, a sixth spacer element P6, a sixth lens E6, a filter, and an imaging surface S15.

[0121] The first lens E1 has negative focal power, with a concave object side surface S1 and a convex image side surface S2. The second lens E2 has positive focal power, with a convex object side surface S3 and a convex image side surface S4. The third lens E3 has positive focal power, with a convex object side surface S5 and a convex image side surface S6. The fourth lens E4 has negative focal power, with a convex object side surface S7 and a concave image side surface S8. The fifth lens E5 has positive focal power, with a convex object side surface S9 and a convex image side surface S10. The sixth lens E6 has negative focal power, with a convex object side surface S11 and a concave image side surface S12. The filter has an object side surface S13 and an image side surface S14. Light from an object passes through the surfaces S1-S14 in sequence and is ultimately imaged on the image plane S15.

[0122] In this embodiment, the total effective focal length of the optical imaging lens f = 1.35 mm, the maximum length of the lens barrel L = 3.26 mm, the distance on the optical axis from the object side surface S1 of the first lens E1 to the image plane S15 TTL = 3.61 mm, half the diagonal length of the effective pixel area on the image plane S15 ImgH = 1.91 mm, half the maximum field of view angle of the optical imaging lens Semi-FOV = 54.78°, and the F-number Fno = 2.38.

[0123] Table 9 shows the basic parameter table of the optical imaging lens of embodiment 5, wherein the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).

[0124]

[0125]

[0126] Table 9

[0127] In embodiment 5, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. The following table 10 gives the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30, A32, A34, A36, A38, A40, A42, A44, A46, A48, A50, A52, A54, A56, A58, A60, A62, A64, A66, A68, A70, A72, A74, A76, A78, A80, A82, A84, A86, A88, A90, A92, A94, A96, A98, and A100 of the aspherical surfaces S1-S12 that can be used in embodiment 5. 10 12 14 16 18 20 .

[0128] Face Number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 7.4947E-01 -1.2256E-01 5.0381E-02 1.4464E-03 2.9074E-03 -2.0334E-03 3.5098E-04 -3.6362E-05 9.9061E-05 S2 2.7250E-01 -6.7409E-02 2.2033E-03 2.1912E-03 1.1118E-03 -4.7672E-04 -1.3199E-04 4.5953E-05 1.3117E-05 S3 -2.5439E-02 -3.5576E-03 1.0991E-03 7.7120E-05 3.6337E-05 -2.2527E-05 3.1008E-06 -6.7006E-06 2.2629E-06 S4 -2.2001E-03 7.1620E-04 1.4028E-04 7.9848E-06 1.8884E-06 2.5464E-06 4.6090E-07 1.4025E-07 -6.0233E-07 S5 -1.0359E-03 -4.3357E-04 -6.2983E-05 -3.9405E-06 -4.4095E-06 1.1858E-06 -1.2613E-06 8.4312E-07 -1.9537E-07 S6 -5.5849E-02 -3.0791E-03 -1.0521E-03 -1.9539E-04 -5.9491E-05 -1.0617E-05 1.9626E-07 -2.6513E-06 -1.5692E-07 S7 -1.1876E-01 1.0556E-03 -1.1510E-03 1.1859E-05 -1.1032E-04 2.1391E-05 -1.1186E-05 8.2859E-06 -1.1333E-06 S8 -1.9049E-01 1.8199E-02 -3.8701E-03 9.2180E-04 -2.9252E-04 1.1797E-04 -6.4080E-05 1.7298E-05 -1.5307E-05 S9 -3.4685E-02 6.2882E-03 -3.9907E-03 1.8355E-03 -1.5600E-05 1.9022E-04 -6.0885E-05 1.3557E-05 -1.5287E-05 S10 1.1426E-01 -2.4176E-02 1.4443E-02 -6.3181E-04 5.4354E-03 1.3755E-03 8.5742E-04 7.2792E-05 7.6807E-05 S11 -6.5253E-01 -8.9801E-03 7.4158E-03 8.4112E-03 6.6088E-03 1.0915E-03 7.1456E-04 1.7360E-04 2.3737E-04 S12 -8.6639E-01 8.2117E-02 -4.0648E-02 1.1771E-02 -2.7673E-03 6.0903E-04 -3.1432E-04 1.3047E-04 -4.5207E-05

[0129] Table 10

[0130] Figure 10A The on-axis chromatic aberration curve of the optical imaging lens of embodiment 5 is shown, which represents the deviation of the converging focal points of light rays of different wavelengths after passing through the lens. Figure 10B ​​​​​Astigmatism curves of the optical imaging lens of Embodiment 5 are shown, which represent the meridional image surface curvature and sagittal image surface curvature corresponding to different field angles. According to Figures 10A-10B It can be known that the optical imaging lens given in Embodiment 5 can achieve good imaging quality.

[0131] Example 6

[0132] The following refers to Figures 11-12B An optical imaging lens according to Embodiment 6 of the present application is described. Figure 11 A structural schematic diagram of the optical imaging lens according to Embodiment 6 of the present application is shown.

[0133] As Figure 11 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a stop STO, 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, a sixth spacer element P6, a sixth lens E6, a filter, and an imaging surface S15.

[0134] The first lens E1 has negative refractive power, the object side surface S1 thereof is a concave surface, and the image side surface S2 thereof is a convex surface. The second lens E2 has positive refractive power, the object side surface S3 thereof is a convex surface, and the image side surface S4 thereof is a convex surface. The third lens E3 has positive refractive power, the object side surface S5 thereof is a convex surface, and the image side surface S6 thereof is a convex surface. The fourth lens E4 has negative refractive power, the object side surface S7 thereof is a convex surface, and the image side surface S8 thereof is a concave surface. The fifth lens E5 has positive refractive power, the object side surface S9 thereof is a convex surface, and the image side surface S10 thereof is a convex surface. The sixth lens E6 has negative refractive power, the object side surface S11 thereof is a convex surface, and the image side surface S12 thereof is a concave surface. The filter has an object side surface S13 and an image side surface S14. Light from an object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0135] In the present embodiment, the total effective focal length of the optical imaging lens f = 1.35 mm, the maximum length of the lens barrel L = 3.26 mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 3.61 mm, the half of the diagonal length of the effective pixel area on the imaging surface S15 ImgH = 1.91 mm, the half of the maximum field angle of the optical imaging lens Semi-FOV = 54.78°, and the F-number Fno = 2.38.

[0136] Table 11 shows the basic parameter table of the optical imaging lens of Embodiment 6, wherein the units of the curvature radius, the thickness, and the focal length are all millimeters (mm).

[0137]

[0138] Table 11

[0139] In Example 6, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 12 below shows the higher-order coefficients A4, A6, A8, and A6 that can be used for each of the aspherical mirrors S1-S12 in Example 6. 10 A 12 A 14 A 16 A 18 and A 20 .

[0140]

[0141]

[0142] Table 12

[0143] Figure 12A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 6 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 12B The astigmatism curves of the optical imaging lens of Embodiment 6 are shown, representing the meridional and sagittal image plane curvatures corresponding to different field of view angles. According to... Figures 12A-12B It can be seen that the optical imaging lens given in Example 6 can achieve good imaging quality.

[0144] The basic data in Examples 1 to 6 also satisfy the relationships shown in Table 13.

[0145] Base Data / Example 1 2 3 4 5 6 d1s 1.30 1.56 1.22 2.00 1.44 2.00 D1s 3.65 2.67 3.40 3.40 3.60 3.60 d2s 0.74 1.54 0.72 1.40 0.90 1.40 d3s 0.92 1.52 0.90 1.40 0.88 1.80 D3s 3.85 2.90 3.60 2.50 3.80 2.56 d6s 2.32 2.51 1.90 2.40 2.16 2.40 ds 2.40 2.40 2.15 2.15 2.33 2.33 D0s 4.87 4.87 4.65 4.65 4.81 4.81 D0M 5.34 5.34 5.10 5.10 5.26 5.26 EP01 0.25 0.25 0.35 0.35 2.78 0.30 EP34 0.42 0.45 0.39 0.43 0.39 0.40

[0146] Table 13

[0147] in, Figure 13 This is a schematic diagram defining the dimensions of an optical imaging lens. The basic data ds, d1s, d2s, d3s, d6s, D0s, D1s, D3s, D0M, EP01, and EP34 in the above embodiments are all based on... Figure 13 The dimensions shown were obtained by measurement.

[0148] In summary, the conditional expressions in Examples 1 to 6 satisfy the relationships shown in Table 14.

[0149]

[0150]

[0151] Table 14

[0152] The application also provides an imaging device, the electronic photosensitive element of which can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a separate imaging apparatus 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.

[0153] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used. Those skilled in the art should understand that the scope of the present application is not limited to the technical solutions formed by the specific combinations of the technical features described above, and should also cover other technical solutions formed by any combinations of the technical features described above or their equivalent features without departing from the concept. For example, the technical solutions formed by the mutual replacement of the above-described features and the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. An optical imaging lens, characterized in that, The lens includes a lens barrel and a lens assembly assembled within the lens barrel. The lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in sequence along the optical axis from the object side to the image side. The first lens to the sixth lens all abut against the inner wall of the lens barrel. The first lens has negative optical power; The second lens has positive optical power and its object-side surface is convex. The third lens has positive optical power, and both its object-side and image-side surfaces are convex. The fourth lens has negative optical power, and its object side is convex while its image side is concave. The fifth lens has positive optical power, and both its object-side and image-side surfaces are convex. The sixth lens has negative optical power, and its object side is convex while its image side is concave. A first spacer element is provided between the first lens and the second lens; A second spacer element is provided between the second lens and the third lens; The optical imaging lens contains six lenses with optical power; and 2.97≤d1s / d2s+T12 / CT1≤5.15,1 <d1s / d2s<1.8, Wherein, d1s is the inner diameter of the first spacer element near the object side, d2s is the inner diameter of the second spacer element near the object side, T12 is the air gap between the first lens and the second lens on the optical axis, and CT1 is the center thickness of the first lens on the optical axis.

2. The optical imaging lens according to claim 1, characterized in that, The outer diameter D0s of the end of the lens barrel near the object side, the outer diameter D0M of the end of the lens barrel near the image side, the maximum length L of the lens barrel, and the total effective focal length f of the lens group satisfy the following: 2.29mm -1 ≤(D0s+D0M) / (L×f)≤2.90mm -1 。 3. The optical imaging lens according to claim 1, characterized in that, A third spacer element is provided between the third lens and the fourth lens. The inner diameter d3s of the third spacer element near the object side, the outer diameter D3s of the third spacer element near the object side, the center thickness CT3 of the third lens on the optical axis, and the radius of curvature R5 of the object side surface of the third lens satisfy the following: 0.28mm -1 ≤(D3s-d3s) / |CT3×R5|≤2.85mm -1 。 4. The optical imaging lens according to claim 3, characterized in that, A fourth spacer element is disposed between the fourth lens and the fifth lens, and the distance EP34 between the third spacer element and the fourth spacer element satisfies the following condition: 1.9 < EP34 / CT4 ≤ 2.

15.

5. The optical imaging lens according to claim 3, characterized in that, The center thickness CT3 of the third lens on the optical axis, the radius of curvature R6 of the image-side surface of the third lens, the outer diameter D2s of the second spacer element near the object side, and the inner diameter d3s of the third spacer element near the object side satisfy the following: 0.3<|CT3 / R6|×(D2s / d3s)<1.

25.

6. The optical imaging lens according to claim 1, characterized in that, A fifth spacer element and a sixth spacer element are disposed between the fifth lens and the sixth lens. The radius of curvature R10 of the image side of the fifth lens, the center thickness CT6 of the sixth lens on the optical axis, the inner diameter d6m of the sixth spacer element near the image side, and the maximum effective radius DT61 of the object side of the sixth lens satisfy the following: 0.10≤|R10 / CT6|-d6m / DT61<0.

7.

7. The optical imaging lens according to claim 1, characterized in that, The air gap T12 between the first lens and the second lens on the optical axis, the distance EP01 between the object-side end face of the lens barrel and the first spacer element on the optical axis, the maximum effective radius DT21 of the object-side surface of the second lens, and the inner diameter d1s of the first spacer element near the object side satisfy the following: 2.31≤T12 / EP01+d1s / DT21≤5.

42.

8. The optical imaging lens according to claim 1, characterized in that, The minimum inner diameter ds of the lens barrel near the object side, the air gap T12 between the first and second lenses on the optical axis, the outer diameter D0M of the end of the lens barrel near the image side, and the distance TD between the object side of the first lens and the image side of the sixth lens on the optical axis satisfy the following conditions with the aperture number fno of the optical imaging lens: 6.52≤ds / T12+D0M / (TD×fno)≤11.

58.

9. The optical imaging lens according to claim 8, characterized in that, The outer diameter D1s of the first spacer element near the object side, the inner diameter d1s of the first spacer element near the object side, the inner diameter d2s of the second spacer element near the object side, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the air gap T12 of the first lens and the second lens on the optical axis satisfy the following: 1.28≤D1s / (CT1+T12+CT2)-d1s / d2s≤3.

30.

10. The optical imaging lens according to any one of claims 3 to 5, characterized in that, The outer diameter Dns of the nth spacer closest to the object side and the center thickness CTn of the nth lens on the optical axis satisfy the following: 6.35≤Dns / CTn≤17.34, where n≤3.

11. An optical imaging lens, characterized in that, The lens includes a lens barrel and a lens group assembled within the lens barrel. The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in sequence along the optical axis from the object side to the image side. An air gap exists between any two adjacent lenses from the first lens to the sixth lens. The first lens has negative optical power; The second lens has positive optical power and its object-side surface is convex. The third lens has positive optical power, and both its object-side and image-side surfaces are convex. The fourth lens has negative optical power, and its object side is convex while its image side is concave. The fifth lens has positive optical power, and both its object-side and image-side surfaces are convex. The sixth lens has negative optical power, and its object side is convex while its image side is concave. A first spacer element is provided between the first lens and the second lens; A second spacer element is provided between the second lens and the third lens; A third spacer element is provided between the third lens and the fourth lens; The optical imaging lens contains six lenses with optical power; and 6.35≤Dns / CTn≤17.34, 1 <d1s / d2s<1.8, Wherein, Dns is the outer diameter of the nth spacer element near the object side, CTn is the center thickness of the nth lens on the optical axis, n≤3, d1s is the inner diameter of the first spacer element near the object side, and d2s is the inner diameter of the second spacer element near the object side.

12. The optical imaging lens according to claim 11, characterized in that, The outer diameter D0s of the end of the lens barrel near the object side, the outer diameter D0M of the end of the lens barrel near the image side, the maximum length L of the lens barrel, and the total effective focal length f of the lens group satisfy the following: 2.29mm -1 ≤(D0s+D0M) / (L×f)≤2.90mm -1 。 13. The optical imaging lens according to claim 11, characterized in that, The inner diameter d3s of the third spacer element near the object side, the outer diameter D3s of the third spacer element near the object side, the center thickness CT3 of the third lens on the optical axis, and the radius of curvature R5 of the object side surface of the third lens satisfy the following: 0.28mm -1 ≤(D3s-d3s) / |CT3×R5|≤2.85mm -1 。 14. The optical imaging lens according to claim 11, characterized in that, A fourth spacer element is disposed between the fourth lens and the fifth lens, and the distance EP34 between the third spacer element and the fourth spacer element satisfies the following condition: 1.9 < EP34 / CT4 ≤ 2.

15.

15. The optical imaging lens according to claim 11, characterized in that, The center thickness CT3 of the third lens on the optical axis, the radius of curvature R6 of the image-side surface of the third lens, the outer diameter D2s of the second spacer element near the object side, and the inner diameter d3s of the third spacer element near the object side satisfy the following: 0.3<|CT3 / R6|×(D2s / d3s)<1.

25.

16. The optical imaging lens according to claim 11, characterized in that, A fifth spacer element and a sixth spacer element are disposed between the fifth lens and the sixth lens. The radius of curvature R10 of the image side of the fifth lens, the center thickness CT6 of the sixth lens on the optical axis, the inner diameter d6m of the sixth spacer element near the image side, and the maximum effective radius DT61 of the object side of the sixth lens satisfy the following: 0.10≤|R10 / CT6|-d6m / DT61<0.

7.

17. The optical imaging lens according to claim 11, characterized in that, The air gap T12 between the first lens and the second lens on the optical axis, the distance EP01 between the object-side end face of the lens barrel and the first spacer element on the optical axis, the maximum effective radius DT21 of the object-side surface of the second lens, and the inner diameter d1s of the first spacer element near the object side satisfy the following: 2.31≤T12 / EP01+d1s / DT21≤5.

42.

18. The optical imaging lens according to claim 11, characterized in that, The minimum inner diameter ds of the lens barrel near the object side, the air gap T12 between the first and second lenses on the optical axis, the outer diameter D0M of the end of the lens barrel near the image side, and the distance TD between the object side of the first lens and the image side of the sixth lens on the optical axis satisfy the following conditions with the aperture number fno of the optical imaging lens: 6.52≤ds / T12+D0M / (TD×fno)≤11.

58.

19. The optical imaging lens according to claim 18, characterized in that, The outer diameter D1s of the first spacer element near the object side, the inner diameter d1s of the first spacer element near the object side, the inner diameter d2s of the second spacer element near the object side, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the air gap T12 of the first lens and the second lens on the optical axis satisfy the following: 1.28≤D1s / (CT1+T12+CT2)-d1s / d2s≤3.30.

Images