CN114859512B - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN114859512B
CN114859512B CN202210522923.8A CN202210522923A CN114859512B CN 114859512 B CN114859512 B CN 114859512B CN 202210522923 A CN202210522923 A CN 202210522923A CN 114859512 B CN114859512 B CN 114859512B
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China
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lens
optical imaging
image side
spacer
spacer element
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CN114859512A (en
Inventor
王泽光
丁先翠
丁仁
朱佳栋
李辉
黄林
戴付建
赵烈烽
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Priority to CN202210522923.8A priority Critical patent/CN114859512B/en
Publication of CN114859512A publication Critical patent/CN114859512A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The application discloses an optical imaging lens, which comprises a lens group, wherein the optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens from an object side to an image side along an optical axis; a plurality of spacing elements, at least one spacing element of the plurality of spacing elements is arranged between any two adjacent lenses of the first lens to the eighth lens; and a lens barrel for accommodating the lens group and the spacer member; wherein the first lens has negative optical power; the focal power of at least four lenses from the second lens to the eighth lens is positive, and the object side surfaces of at least two lenses from the first lens to the eighth lens are concave surfaces; the plurality of spacing elements includes a third spacing element disposed between the third lens and the fourth lens and at least partially contacting an image side surface of the third lens; the effective focal length f of the optical imaging lens, the maximum half field angle Semi-FOV of the optical imaging lens and the minimum inner diameter d3 of the third spacer element satisfy: 5.0< f×Tan (Semi-FOV)/d 3 is not more than 10.

Description

Optical imaging lens
Technical Field
The present application relates to the field of optical elements, and in particular, to an optical imaging lens.
Background
In recent years, with the rapid development of smart phones, the trend of using mobile phone photographing to replace a traditional camera is more and more obvious, and the mass is more and more favored for mobile phones with high-quality photographing function. The pictures shot by the wide-angle lens can stand out the central main body and the foreground, have a wide background, can shoot more sceneries in a smaller environment, is beneficial to enhancing the infectivity of the pictures, and enables a photographer to have an immersive sensation. However, the requirement on the thickness ratio of the first lens is higher for the lens with a large view field, and meanwhile, the imaging quality of the lens is seriously affected by the existence of stray light phenomenon and deviation of assembly stability; meanwhile, the large-view-field lens also faces the problem that the thickness of the mobile phone is heavy due to the fact that the outer diameter of the lens is large and the length of the lens is long. Therefore, how to reasonably arrange the lenses and the spacing pieces, and the inner diameter, the outer diameter and the thickness of the spacing pieces so that the lens has a large visual field, and meanwhile, the outer diameter is small and ultrathin, and the problems of effectively improving stray light and optimizing the assembly stability of the lens are to be solved in the field of lenses.
Disclosure of Invention
The present application provides such an optical imaging lens, the optical imaging lens includes: the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens in sequence from an object side to an image side along an optical axis; a plurality of spacing elements, at least one spacing element of the plurality of spacing elements is arranged between any two adjacent lenses of the first lens to the eighth lens; and a lens barrel for accommodating the lens group and the plurality of spacer elements; wherein the first lens has negative optical power; the focal power of at least four lenses from the second lens to the eighth lens is positive, and the object side surfaces of at least two lenses from the first lens to the eighth lens are concave surfaces; the plurality of spacing elements includes a third spacing element disposed between the third lens and the fourth lens and at least partially contacting an image side surface of the third lens; the effective focal length f of the optical imaging lens, the maximum half field angle Semi-FOV of the optical imaging lens and the minimum inner diameter d3 of the third spacer element satisfy: 5.0< f×Tan (Semi-FOV)/d 3 is not more than 10.
In one embodiment, edge regions of at least two adjacent lenses of the fourth lens to the sixth lens are partially abutted against each other.
In one embodiment, the fifth lens has negative power and the eighth lens has negative power.
In one embodiment, the object side and image side surfaces of at least three lenses in the lens group are each convex at the paraxial region.
In one embodiment, at most three lenses in the lens group have an abbe number of less than 40.
In one embodiment, the maximum half field angle Semi-FOV of the optical imaging lens, the effective focal length f of the optical imaging lens, the outer diameter D0m of the image side surface of the barrel, and the inner diameter D0s of the object side surface of the barrel satisfy: 2.0< tan (Semi-FOV)/((D0 m-D0 s)/f) <5.5.
In one embodiment, the effective focal length f of the optical imaging lens, the entrance pupil diameter EPD of the optical imaging lens, the inner diameter d0m of the image side surface of the lens barrel, and the minimum inner diameter d3 of the third spacer element satisfy: 10< (d 0m-d 3)/EPD× (d 0 m/f) <20.
In one embodiment, the inner diameter d0s of the object side surface of the lens barrel, the inner diameter d0m of the image side surface of the lens barrel, the entrance pupil diameter EPD of the optical imaging lens, and the maximum length L of the lens barrel satisfy: d0s/EPD×L/(d 0m-d0 s) <11.0.
In one embodiment, the plurality of spacer elements further comprises: a sixth spacer element located between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens, and a seventh spacer element located between the seventh lens and the eighth lens and at least partially in contact with the image side surface of the seventh lens, wherein a center thickness CT6 of the sixth lens on the optical axis, a center thickness CT7 of the seventh lens on the optical axis, a maximum thickness CP6 of the sixth spacer element, a maximum thickness CP7 of the seventh spacer element satisfy: 15< CT6/CP6+CT7/CP7 is less than or equal to 90.
In one embodiment, the plurality of spacer elements further comprises: a sixth spacer element located between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens and a seventh spacer element located between the seventh lens and the eighth lens and at least partially in contact with the image side surface of the seventh lens, wherein an effective focal length f6 of the sixth lens, an effective focal length f7 of the seventh lens, a maximum thickness CP6 of the sixth spacer element, a maximum thickness CP7 of the seventh spacer element, a distance EP67 along the optical axis from the image side surface of the sixth spacer element to the object side surface of the seventh spacer element satisfy: 2.0< |f6+f7|/(CP6+EP 67+CP7) <16.
In one embodiment, the plurality of spacer elements further comprises: a sixth spacing element located between the sixth lens and the seventh lens and at least partially contacting an image side surface of the sixth lens, and a seventh spacing element located between the seventh lens and the eighth lens and at least partially contacting an image side surface of the seventh lens, wherein a center thickness CT6 of the sixth lens on the optical axis, a center thickness CT7 of the seventh lens on the optical axis, and a distance EP67 along the optical axis between the image side surface of the sixth spacing element and the object side surface of the seventh spacing element satisfy: 1.0< (CT6+CT7)/EP 67<3.5.
In one embodiment, the plurality of spacer elements further comprises: the distance EP23 between the image side of the second spacing element and the object side of the third spacing element along the optical axis and the distance EP34 between the image side of the third spacing element and the object side of the fourth spacing element along the optical axis satisfy: 15< f3/EP23+f4/EP 34.ltoreq.31.
In one embodiment, the plurality of spacer elements further comprises: the distance EP23 between the image side surface of the second spacing element and the object side surface of the third spacing element along the optical axis and the distance EP34 between the image side surface of the third spacing element and the object side surface of the fourth spacing element along the optical axis satisfy: 0< |CT3-EP23|/|CT4-EP34| <2.5.
In one embodiment, the minimum inner diameter d3 of the third spacer element, the maximum thickness CP3 of the third spacer element, the distance EP34 between the image side surface of the third spacer element and the object side surface of the fourth spacer element along the optical axis, and the center thickness CT4 of the fourth lens on the optical axis satisfy: 10< d3/|CP3+EP34-CT 4|is less than or equal to 45.
In one embodiment, the plurality of spacer elements further comprises: a first spacer element, a second spacer element, a fourth spacer element, a fifth spacer element, a sixth spacer element and a seventh spacer element, wherein the first spacer element is located between the first lens and the second lens and is at least partially in contact with the image side of the first lens, the second spacer element is located between the second lens and the third lens and is at least partially in contact with the image side of the second lens, the fourth spacer element is located between the fourth lens and the fifth lens and is at least partially in contact with the image side of the fourth lens, the fifth spacer element is located between the fifth lens and the sixth lens and is at least partially in contact with the image side of the fifth lens, the sixth spacer element is located between the sixth lens and the seventh lens and is at least partially in contact with the image side of the sixth lens, the seventh spacer element is located between the seventh lens and the eighth lens and is at least partially in contact with the image side of the seventh lens, wherein the outer diameter D7m of the image side of the seventh spacer element, the sum Σdim of the outer diameters of the image sides of the first spacer element to the image side of the sixth spacer element satisfies: 1.2< D7 m/(ΣDim/6) <1.8.
The first lens of the optical imaging lens has negative focal power, the focal power of at least four lenses from the second lens to the eighth lens is positive, the object side surfaces of at least two lenses are concave surfaces, the focal power of the lens group is reasonably distributed, aberration can be well corrected, and meanwhile, the size of the whole lens group is shortened to achieve the purposes of ultra-thin and ultra-wide angle; at least one interval element is arranged between any two adjacent lenses from the first lens to the eighth lens, so that the self strength of the optical imaging lens can be improved, and stray light can be reduced; the effective focal length of the optical imaging lens, the maximum half field angle of the optical imaging lens and the minimum inner diameter of the third interval element are controlled within a reasonable range, so that the brightness degree of imaging of the lens can be effectively controlled, and high-quality imaging quality can be obtained. Therefore, the optical imaging lens has at least one beneficial effect of higher imaging quality, less parasitic light, good system stability and the like.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:
FIG. 1 is a schematic diagram showing a structural layout and some parameters of an optical imaging lens according to the present application;
Fig. 2 shows a schematic configuration diagram of a lens group of an optical imaging lens according to embodiment 1 of the present application;
fig. 3A to 3C show schematic structural views of three optical imaging lenses according to embodiment 1 of the present application;
fig. 4A to 4B show an on-axis chromatic aberration curve and an astigmatism curve of the optical imaging lens according to embodiment 1 of the present application, respectively;
fig. 5 shows a schematic configuration diagram of a lens group of an optical imaging lens according to embodiment 2 of the present application;
fig. 6A to 6C show schematic structural views of three optical imaging lenses according to embodiment 2 of the present application;
fig. 7A to 7B show an on-axis chromatic aberration curve and an astigmatism curve of the optical imaging lens according to embodiment 2 of the present application, respectively;
fig. 8 shows a schematic configuration diagram of a lens group of an optical imaging lens according to embodiment 3 of the present application;
fig. 9A to 9C show schematic structural views of three optical imaging lenses according to embodiment 3 of the present application; and
fig. 10A to 10B show an on-axis chromatic aberration curve and an astigmatism curve of the optical imaging lens according to embodiment 3 of the present application, respectively.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed description are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
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 feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape 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 figures are merely examples and are not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is referred to as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify 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. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the present application, use of "may" means "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
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 will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The following examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements may be made without departing from the concept of the present invention, which are all within the scope of the present invention, for example, the lens group, the lens barrel, and the spacer element in the embodiments of the present application may be arbitrarily combined, and the lens group in one embodiment is not limited to be combined with the lens barrel, the spacer element, and the like in the embodiment. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. Wherein fig. 1 shows a schematic diagram of a structural layout and a part of parameters of an optical imaging lens according to the present application. It will be appreciated by those skilled in the art that some parameters commonly used in the art, such as the center thickness CT6 of the sixth lens on the optical axis, are not shown in fig. 1, and fig. 1 illustrates only a part of the parameters of one optical imaging lens of the present application for better understanding of the present invention.
The features, principles, and other aspects of the present application are described in detail below.
An optical imaging lens according to an exemplary embodiment of the present application may include a lens group, a plurality of spacer elements, and a barrel for accommodating the lens group and the spacer elements. The lens assembly may further include, in order from an object side to an image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens having optical power. Any two adjacent lenses from the first lens to the eighth lens can have a spacing distance therebetween. At least one spacing element may be disposed between any adjacent two of the first to eighth lenses.
In an exemplary embodiment, the plurality of spacer elements may include a first spacer element, a second spacer element, a fourth spacer element, a fifth spacer element, a sixth spacer element, and a seventh spacer element, wherein the first spacer element is positioned between the first lens and the second lens and is at least partially in contact with an image side of the first lens, the second spacer element is positioned between the second lens and the third lens and is at least partially in contact with an image side of the second lens, the third spacer element is positioned between the third lens and the fourth lens and is at least partially in contact with an image side of the third lens, the fourth spacer element is positioned between the fourth lens and the fifth lens and is at least partially in contact with an image side of the fourth lens, the fifth spacer element is positioned between the fifth lens and the sixth lens and is at least partially in contact with an image side of the fifth lens, the sixth spacer element is positioned between the sixth lens and the seventh lens and is at least partially in contact with an image side of the sixth lens, and the seventh spacer element is positioned between the seventh lens and is at least partially in contact with an image side of the eighth lens. The optical imaging lens is internally provided with a plurality of spacing elements, which is beneficial to improving the self strength of the optical imaging lens and reducing stray light.
In an exemplary embodiment, the first lens may have negative optical power; the second lens may have positive or negative optical power; the third lens may have positive or negative optical power; the fourth lens may have positive or negative optical power; the fifth lens may have negative optical power; the sixth lens may have positive or negative optical power; the seventh lens may have positive or negative optical power; the eighth lens may have negative optical power. The positive and negative focal power of each lens of the optical imaging lens is reasonably distributed, so that the low-order aberration of the optical imaging lens can be effectively balanced and controlled, the sensitivity of tolerance can be reduced, meanwhile, the size of the whole lens group is shortened to achieve the purposes of ultra-thin and ultra-wide angle, and the miniaturization of the optical imaging lens is maintained.
In an exemplary embodiment, the optical power of at least four lenses of the second to eighth lenses is positive, and the object side surface of at least two lenses of the first to eighth lenses is concave.
In an exemplary embodiment, edge regions of at least two adjacent lenses of the fourth lens to the sixth lens may partially bear against each other. And the edge areas of the fourth lens to the sixth lens are controlled to bear, so that the assembly deformation is reduced, the assembly stability is improved, and the influence sensitivity of the air interval on the lens is reduced.
In an exemplary embodiment, the object side and the image side of at least three lenses of the lens group are both convex at the paraxial region. The method is beneficial to reducing the air gap, reducing the using amount of the thick spacer ring, reducing the quality deterioration problem caused by the assembly deformation of the thick spacer ring, and improving the assembly stability of the optical imaging lens.
In an exemplary embodiment, at most three lenses in the lens group have abbe numbers less than 40. The smaller the refractive index of the medium is, the lighter the dispersion is, the larger the Abbe number is, the Abbe number influences imaging definition, the higher the Abbe number in the lens group is, the better the imaging quality is, and the Abbe number of the lens is reasonably controlled to obtain better imaging quality.
In an exemplary embodiment, the optical imaging lens according to the present application further includes a stop located between the third lens and the fourth lens. More specifically, the diaphragm is disposed on the image side of the third lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 5.0< f×tan (Semi-FOV)/d 3 is less than or equal to 10, where f is the effective focal length of the optical imaging lens, semi-FOV is the maximum half field angle of the optical imaging lens, d3 is the minimum inner diameter of the third spacer element, and d3 can be referred to in FIG. 1. More specifically, f, semi-FOV, and d3 may further satisfy: 6.41< f.times.tan (Semi-FOV)/d 3 is less than or equal to 9.60. The third interval element plays a role in intercepting redundant light for the diaphragm hole, and meanwhile, the design can avoid generation of feather stray light, satisfies 5.0< f multiplied by Tan (Semi-FOV)/d 3 less than or equal to 10, and is beneficial to effectively controlling the brightness degree of lens imaging, so that the imaging quality is high.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.0< tan (Semi-FOV)/((D0 m-D0 s)/f) <5.5, where Semi-FOV is the maximum half field angle of the optical imaging lens, f is the effective focal length of the optical imaging lens, D0m is the outer diameter of the image side of the barrel, D0s is the inner diameter of the object side of the barrel, and D0m and D0s can refer to fig. 1. More specifically, semi-FOV, f, D0m, and D0s may further satisfy: 2.35< tan (Semi-FOV)/((D0 m-D0 s)/f) <5.30. Satisfies 2.0< tan (Semi-FOV)/((D0 m-D0 s)/f) <5.5, is favorable for obtaining a large field angle, ensures wider photographing range, is favorable for controlling the outer diameter size of the whole lens, achieves the aim of ultra-wide angle of the small lens, and reduces the weight of the whole optical imaging lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 10< (d 0m-d 3)/epd× (d 0 m/f) <20, wherein d0m is the inner diameter of the image side surface of the lens barrel, d3 is the minimum inner diameter of the third spacing element, EPD is the entrance pupil diameter of the optical imaging lens, f is the effective focal length of the optical imaging lens, and d0m and d3 can be referred to fig. 1. More specifically, d0m, d3, f, and EPD may further satisfy: 13.03< (d 0m-d 3)/EPD× (d 0 m/f) <18.02. Satisfying 10< (d 0m-d 3)/EPD x (d 0 m/f) <20, being favorable to effectively promoting light convergence, promoting relative illuminance, thereby promoting the imaging performance of the optical imaging lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 8.0.ltoreq.d0s/EPD.times.L/(d 0m-d0 s) <11.0, where d0s is the inner diameter of the object side surface of the lens barrel, d0m is the inner diameter of the image side surface of the lens barrel, EPD is the entrance pupil diameter of the optical imaging lens, L is the maximum length of the lens barrel, and more specifically L is the maximum length of the lens barrel in the optical axis direction, d0s, d0m and L can refer to FIG. 1. More specifically, CT5, CT6, CT7, T56, and T67 may further satisfy: d0s/EPD×L/(d 0m-d0 s) <10.61 of 8.18. Ltoreq.d0 s. Satisfies d0s/EPD×L/(d 0m-d0 s) <11.0, and is beneficial to minimizing the diameter of the lens on the basis of satisfying imaging, thereby improving imaging quality and reducing the weight of the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 15< CT6/CP6+CT7/CP7.ltoreq.90, wherein CT6 is the center thickness of the sixth lens on the optical axis, CT7 is the center thickness of the seventh lens on the optical axis, CP6 is the maximum thickness of the sixth spacer element, and CP7 is the maximum thickness of the seventh spacer element. More specifically, CT6, CP6, CT7, and CP7 may further satisfy: 17.37< CT6/CP6+CT7/CP7.ltoreq.89.51. Satisfying 15< CT6/CP6+CT7/CP7 is less than or equal to 90, is favorable to reducing the air interval of sixth lens and seventh lens on the optical axis and the center thickness of sixth interval element, seventh interval element, makes the structure sensitivity of camera lens to sixth interval element, seventh interval element reduce to reduce the influence degree of air gap clearance to camera lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.0< |f6+f7|/(CP6+EP 67+CP7) <16, wherein f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, CP6 is the maximum thickness of the sixth spacing element, CP7 is the maximum thickness of the seventh spacing element, and EP67 is the distance between the image side surface of the sixth spacing element and the object side surface of the seventh spacing element along the optical axis. More specifically, f6, f7, CP6, EP67 and CP7 may further satisfy: 2.51< |f6+f7|/(CP6+EP 67+CP7) <15.27. Satisfying 2.0< |f6+f7|/(CP6+EP 67+CP7) <16, is favorable to reducing the stray light intensity of the sixth spacing element and the seventh spacing element and reducing the angle of stray light generation, and makes the imaging quality of the optical imaging lens better.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0< (CT 6+ CT 7)/EP 67<3.5, wherein CT6 is a center thickness of the sixth lens element on the optical axis, CT7 is a center thickness of the seventh lens element on the optical axis, and EP67 is a distance between an image side surface of the sixth spacer element to an object side surface of the seventh spacer element along the optical axis. More specifically, CT6, CT7 and EP67 may further satisfy: 1.27< (CT6+CT7)/EP 67<3.36. Satisfies 1.0< (CT 6+CT7)/EP 67<3.5, is favorable for effectively controlling the uniformity of the seventh lens, enhances the structural stability of the seventh lens, and reduces the field curvature sensitivity, thereby reducing the influence degree of air gap change on the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 15< f3/EP23+f4/EP 34.ltoreq.31, where f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, EP23 is the distance between the image side surface of the second spacer element and the object side surface of the third spacer element along the optical axis, EP34 is the distance between the image side surface of the third spacer element and the object side surface of the fourth spacer element along the optical axis, and EP34 can refer to fig. 1. More specifically, f3, EP23, f4 and EP34 further satisfy: 17.30< f3/EP23+f4/EP 34.ltoreq.30.57. Satisfying 15< f3/EP23+f4/EP34 < 31, is favorable for reducing the field sensitivity of the second spacing element and the fourth spacing element, and reduces the structural sensitivity of the lens to the second spacing element and the fourth spacing element, thereby reducing the influence degree of the air gap clearance on the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0< |CT3-EP23|/|CT4-EP34| <2.5, wherein CT3 is the center thickness of the third lens element on the optical axis, CT4 is the center thickness of the fourth lens element on the optical axis, EP23 is the distance from the image side of the second spacing element to the object side of the third spacing element along the optical axis, EP34 is the distance from the image side of the third spacing element to the object side of the fourth spacing element along the optical axis, and EP34 can refer to FIG. 1. More specifically, CT3, EP23, CT4 and EP34 may further satisfy: 0.11< |CT3-EP23|/|CT4-EP34| <2.18. Satisfies 0< |CT3-EP23|/|CT4-EP34| <2.5, is favorable for reducing the center thickness of the third lens and the fourth lens, can effectively control the thickness ratio of the third lens and the fourth lens, enhances the structural stability of the two lenses, and reduces the field curvature sensitivity.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 10< d3/|CP3+EP34-CT 4|is less than or equal to 45, wherein d3 is the minimum inner diameter of the third spacer element, CP3 is the maximum thickness of the third spacer element, EP34 is the distance between the image side surface of the third spacer element and the object side surface of the fourth spacer element along the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, and d3, CP3 and EP34 can refer to FIG. 1. More specifically, d3, CP3, EP34 and CT4 may further satisfy: 12.63< d3/|CP3+EP34-CT4| is less than or equal to 44.75. Satisfying 10< d3/|CP3+EP34-CT 4|is less than or equal to 45, being favorable to reasonable management and control of third interval element parameters, avoiding generation of feather stray light, simultaneously improving field curvature stability and overall structural strength through controlling air interval, and obtaining better reliability performance.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.2< D7 m/(Σdim/6) <1.8, where D7m is the outer diameter of the image side surface of the seventh spacer element, D7m can refer to fig. 1, Σdim is the sum of the outer diameters of the image side surfaces of the first to sixth spacer elements. More specifically, D7m and Σdim may further satisfy: 1.28< D7 m/(ΣDim/6) <1.65. Satisfying 1.2< D7 m/(ΣDim/6) <1.8, being beneficial to reasonably controlling the parameters of the seventh spacing element, avoiding the generation of bright-fork parasitic light and improving the imaging quality.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: the Semi-FOV is more than 70 degrees, wherein the Semi-FOV is the maximum half field angle of the optical imaging lens. More specifically, the Semi-FOV may be, for example, in the range of 74.4 ° to 79.5 °, which is advantageous for achieving characteristics such as a large image plane.
In an exemplary embodiment, the effective focal length f of the optical imaging lens may be, for example, in the range of 3.44mm to 3.67mm, the effective focal length f1 of the first lens may be, for example, in the range of-5.65 mm to-5.45 mm, the effective focal length f2 of the second lens may be, for example, in the range of 18.41mm to 28.88mm, the effective focal length f3 of the third lens may be, for example, in the range of 6.56mm to 6.89mm, the effective focal length f4 of the fourth lens may be, for example, in the range of 4.13mm to 4.59mm, the effective focal length f5 of the fifth lens may be, for example, in the range of-6.69 mm to-3.98 mm, the effective focal length f6 of the sixth lens may be, for example, in the range of 3.40mm to 9.76mm, the effective focal length f7 of the seventh lens may be, for example, in the range of-7.65 mm to 3.14mm, and the effective focal length f8 of the eighth lens may be, for example, in the range of-6.80 mm to-2.80 mm. The F-number Fno of the optical imaging lens may be, for example, in the range of 2.16 to 2.24.
In an exemplary embodiment, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface. The application provides an optical imaging lens with the characteristics of miniaturization, large image surface, large aperture, high imaging quality and the like. The optical imaging lens according to the above embodiment of the present application may employ a plurality of lenses, for example, the above eight lenses. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like of each lens, incident light rays can be effectively converged, the optical total length of the imaging lens is reduced, and the processability of the imaging lens is improved, so that the optical imaging lens is more beneficial to production and processing.
In the embodiments of the present application, at least one of the mirrors of each lens is an aspherical mirror, that is, at least one of the object side surface of the first lens to the image side surface of the eighth lens is an aspherical mirror. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality. Optionally, at least one of an object side surface and an image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens is an aspherical mirror surface. Optionally, the object side and the image side of each of the first, second, third, fourth, fifth, sixth and seventh lenses are aspheric mirrors, and the object side and the image side of the eighth lens are spherical mirrors.
Specific examples of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.
Example 1
The optical imaging lenses 1001, 1002, and 1003 according to embodiment 1 of the present application are described below with reference to fig. 2 to 4B. Fig. 2 shows a schematic configuration diagram of a lens group 100 of optical imaging lenses 1001, 1002, and 1003 according to embodiment 1 of the present application. Fig. 3A to 3C show schematic structural diagrams of optical imaging lenses 1001, 1002, and 1003 according to embodiment 1 of the present application.
As shown in fig. 3A to 3C, the optical imaging lenses 1001, 1002, and 1003 each include a lens group 100, a lens barrel, and a plurality of spacer elements.
As shown in fig. 2, the lens assembly 100 sequentially includes, from an object side to an image side, a first lens element E1, a second lens element E2, a third lens element E3, a stop STO, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, an eighth lens element E8, a filter E9 and an image plane S19.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. The eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
As shown in fig. 3A, the plurality of spacer elements of the optical imaging lens 1001 includes a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, a sixth spacer element P6, and a seventh spacer element P7. Wherein the first spacer element P1 is disposed between the first lens element E1 and the second lens element E2 and is at least partially in contact with the image side of the first lens element E1, the second spacer element P2 is disposed between the second lens element E2 and the third lens element E3 and is at least partially in contact with the image side of the second lens element E2, the third spacer element P3 is disposed between the third lens element E3 and the fourth lens element E4 and is at least partially in contact with the image side of the third lens element E3, the fourth spacer element P4 is disposed between the fourth lens element E4 and the fifth lens element E5 and is at least partially in contact with the image side of the fourth lens element E4, the fifth spacer element P5 is disposed between the fifth lens element E5 and the sixth lens element E6 and is at least partially in contact with the image side of the fifth lens element E5, the sixth spacer element P6 is disposed between the sixth lens element E6 and the seventh lens element E7 and is at least partially in contact with the image side of the sixth lens element E6 and the seventh lens element E7 is disposed between the seventh lens element E7 and the eighth lens element E8 and is at least partially in contact with the image side of the seventh lens element E7. In the optical imaging lens 1001, the first, second, third, fourth, fifth, sixth, and seventh spacer elements P1, P2, P3, P4, P5, P6, and P7 are spacers. The spacer elements P1 to P7 can block the entry of external excessive light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 1001 can be enhanced.
As shown in fig. 3B, the plurality of spacer elements of the optical imaging lens 1002 include a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, a sixth spacer element P6, and a seventh spacer element P7. The position distribution of the spacing elements P1 to P7 of the optical imaging lens 1002 is the same as the position distribution of the spacing elements P1 to P7 of the optical imaging lens 1001 in fig. 3A, and will not be described again. In the optical imaging lens 1002, the first, second, fourth, fifth, sixth, and seventh spacer elements P1, P2, P4, P5, P6, and P7 are spacers, and the third spacer element P3 is a spacer ring. The spacer elements P1 to P7 can block the entry of external excessive light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 1002 can be enhanced.
As shown in fig. 3C, the plurality of spacer elements of the optical imaging lens 1003 includes a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, a sixth spacer element P6, a seventh spacer element P7, and a seventh sub-spacer element P7b. The position distribution of the spacing elements P1 to P6 of the optical imaging lens 1003 is the same as the position distribution of the spacing elements P1 to P6 of the optical imaging lens 1001 in fig. 3A, and will not be described again. The seventh spacing element P7 and the seventh sub-spacing element P7b are arranged between the seventh lens E7 and the eighth lens E8, wherein the seventh spacing element P7 is at least partially in contact with the image side of the seventh lens E7 and the seventh sub-spacing element P7b is arranged at the image side of the seventh spacing element P7 and is at least partially in contact with the object side of the eighth lens E8. In the optical imaging lens 1003, the first, second, fourth, fifth, sixth, and seventh spacer elements P1, P2, P4, P5, P6, and P7b are spacers, and the third and seventh spacer elements P3 and P7 are spacers. The spacer elements P1 to P7b can block the entry of external excessive light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 1003 can be enhanced.
In this example, the effective focal length F of the optical imaging lenses 1001, 1002, and 1003 is 3.45mm, the maximum half field angle Semi-FOV of the optical imaging lenses 1001, 1002, and 1003 is 74.5 °, and the F-number Fno of the optical imaging lenses 1001, 1002, and 1003 is 2.17.
Table 1 shows basic parameter tables of the lens group 100 of the optical imaging lenses 1001, 1002, and 1003 of embodiment 1, in which the units of radius of curvature, thickness/distance, and effective focal length are all millimeters (mm).
TABLE 1
In embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:
wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the aspherical i-th order. Tables 2-1 and 2-2 show that each of the aspherical mirrors used in example 1 can be usedHigher order term coefficients A for surfaces S1-S14 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 。
Face number A4 A6 A8 A10 A12 A14 A16
S1 8.1507E-02 -6.4965E-02 4.9773E-02 -2.9970E-02 1.3378E-02 -4.3625E-03 1.0222E-03
S2 1.0896E-01 -8.0531E-03 -2.3230E-01 8.0589E-01 -1.5990E+00 2.1718E+00 -2.1094E+00
S3 -7.5218E-03 7.7319E-02 -2.5452E-01 7.5506E-01 -1.4459E+00 1.8522E+00 -1.6290E+00
S4 4.4477E-02 3.5595E-02 -1.7778E-01 1.5146E+00 -6.6516E+00 1.8294E+01 -3.4038E+01
S5 1.8043E-02 5.0756E-02 -3.2505E-01 1.4685E+00 -4.6600E+00 1.0683E+01 -1.8207E+01
S6 -1.5961E-02 -1.3520E-02 8.6550E-02 -5.5791E-01 2.3252E+00 -6.6463E+00 1.3484E+01
S7 6.7081E-03 -1.4586E-01 1.6120E+00 -1.1261E+01 5.1907E+01 -1.6563E+02 3.7610E+02
S8 -9.2084E-03 -4.2278E-02 2.7559E-01 -1.2729E+00 3.6479E+00 -6.2982E+00 5.2657E+00
S9 -1.0906E-01 2.5549E-01 -6.0719E-01 1.2009E+00 -2.3828E+00 4.7460E+00 -7.9238E+00
S10 -3.7959E-01 1.0820E+00 -2.0041E+00 2.2548E+00 -1.0980E+00 -8.7034E-01 2.1835E+00
S11 -3.7631E-01 1.1233E+00 -2.2306E+00 3.0719E+00 -3.0495E+00 2.2342E+00 -1.2233E+00
S12 1.1150E-01 -1.7143E-01 9.6533E-02 2.4120E-02 -9.8225E-02 9.9352E-02 -6.1809E-02
S13 1.3471E-01 -1.8781E-01 1.4573E-01 -6.8248E-02 1.2014E-02 7.0478E-03 -6.3899E-03
S14 8.2383E-02 -3.2183E-02 1.2784E-02 -3.2071E-03 4.5204E-04 -5.2351E-04 4.5236E-04
TABLE 2-1
Face number A18 A20 A22 A24 A26 A28 A30
S1 -1.6640E-04 1.7350E-05 -8.6157E-07 -3.2087E-08 7.8860E-09 -4.7728E-10 1.0591E-11
S2 1.4836E+00 -7.5366E-01 2.7235E-01 -6.7820E-02 1.0967E-02 -1.0238E-03 4.1026E-05
S3 9.8247E-01 -3.9317E-01 9.3912E-02 -8.1186E-03 -1.9232E-03 5.9534E-04 -4.8712E-05
S4 4.4315E+01 -4.0852E+01 2.6538E+01 -1.1873E+01 3.4803E+00 -6.0132E-01 4.6404E-02
S5 2.3367E+01 -2.2538E+01 1.6058E+01 -8.1653E+00 2.7903E+00 -5.7174E-01 5.2884E-02
S6 -1.9805E+01 2.1175E+01 -1.6326E+01 8.8338E+00 -3.1761E+00 6.7971E-01 -6.5341E-02
S7 -6.1636E+02 7.3079E+02 -6.2069E+02 3.6792E+02 -1.4444E+02 3.3722E+01 -3.5419E+00
S8 2.0711E+00 -1.1251E+01 1.4450E+01 -1.0307E+01 4.3936E+00 -1.0504E+00 1.0877E-01
S9 9.9467E+00 -9.0402E+00 5.8320E+00 -2.5979E+00 7.5875E-01 -1.3060E-01 1.0032E-02
S10 -2.1384E+00 1.3062E+00 -5.3850E-01 1.5066E-01 -2.7538E-02 2.9751E-03 -1.4437E-04
S11 5.0223E-01 -1.5375E-01 3.4540E-02 -5.5221E-03 5.9404E-04 -3.8508E-05 1.1358E-06
S12 2.6586E-02 -8.1461E-03 1.7764E-03 -2.6937E-04 2.6978E-05 -1.6026E-06 4.2709E-08
S13 2.5986E-03 -6.7132E-04 1.1765E-04 -1.4009E-05 1.0896E-06 -5.0054E-08 1.0314E-09
S14 -1.8611E-04 4.4626E-05 -6.7796E-06 6.6622E-07 -4.1247E-08 1.4673E-09 -2.2894E-11
TABLE 2-2
Table 3 shows the structural parameter tables of the lens barrels and spacing elements of the optical imaging lenses 1001, 1002, and 1003 of embodiment 1, and each parameter in table 3 is in millimeters (mm).
Structural parameters Optical imaging lens 1001 Optical imaging lens 1002 Optical imaging lens 1003
D1m 6.7000 6.7000 6.7000
D2m 6.8000 6.8000 6.8000
D3m 6.9000 6.6724 6.6293
d3 1.9350 1.9357 1.9357
D4m 7.0000 7.0000 7.1000
D5m 7.1000 7.1000 7.2000
D6m 7.6930 7.6930 7.3000
D7m 9.8000 9.8000 8.9814
d0s 7.0763 7.0819 7.0875
d0m 10.9393 10.4214 10.4214
D0m 12.3391 11.2000 11.2000
EP23 0.6630 0.4666 0.5766
CP3 0.0180 0.2942 0.3842
EP34 0.5976 0.5178 0.4178
CP6 0.0180 0.0180 0.0180
EP67 0.8256 0.8256 0.4815
CP7 0.0180 0.0180 0.3441
L 7.6000 7.6000 7.6000
TABLE 3 Table 3
Fig. 4A shows on-axis chromatic aberration curves of the optical imaging lenses 1001, 1002, and 1003 of embodiment 1, which represent the convergent focus deviation of light rays of different wavelengths after passing through the lenses. Fig. 4B shows astigmatism curves of the optical imaging lenses 1001, 1002, and 1003 of embodiment 1, which represent meridional image plane curvature and sagittal image plane curvature. As can be seen from fig. 4A to 4B, the optical imaging lenses 1001, 1002, and 1003 given in embodiment 1 can achieve good imaging quality.
Example 2
The optical imaging lenses 2001, 2002, and 2003 according to embodiment 2 of the present application are described below with reference to fig. 5 to 7B. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. Fig. 5 shows a schematic configuration diagram of a lens group 200 of optical imaging lenses 2001, 2002, and 2003 according to embodiment 2 of the present application. Fig. 6A to 6C show schematic structural diagrams of optical imaging lenses 2001, 2002, and 2003 according to embodiment 2 of the present application.
As shown in fig. 6A to 6C, the optical imaging lenses 2001, 2002, and 2003 each include a lens group 200, a lens barrel, and a plurality of spacer elements.
As shown in fig. 5, the lens assembly 200 includes, in order from an object side to an image side, a first lens element E1, a second lens element E2, a third lens element E3, a stop STO, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, an eighth lens element E8, a filter E9 and an image plane S19.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has negative refractive power, wherein an object-side surface S15 thereof is convex and an image-side surface S16 thereof is concave. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
As shown in fig. 6A, the plurality of spacer elements of the optical imaging lens 2001 include a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, a sixth spacer element P6, and a seventh spacer element P7. Wherein the first spacer element P1 is disposed between the first lens element E1 and the second lens element E2 and is at least partially in contact with the image side of the first lens element E1, the second spacer element P2 is disposed between the second lens element E2 and the third lens element E3 and is at least partially in contact with the image side of the second lens element E2, the third spacer element P3 is disposed between the third lens element E3 and the fourth lens element E4 and is at least partially in contact with the image side of the third lens element E3, the fourth spacer element P4 is disposed between the fourth lens element E4 and the fifth lens element E5 and is at least partially in contact with the image side of the fourth lens element E4, the fifth spacer element P5 is disposed between the fifth lens element E5 and the sixth lens element E6 and is at least partially in contact with the image side of the fifth lens element E5, the sixth spacer element P6 is disposed between the sixth lens element E6 and the seventh lens element E7 and is at least partially in contact with the image side of the sixth lens element E6 and the seventh lens element E7 is disposed between the seventh lens element E7 and the eighth lens element E8 and is at least partially in contact with the image side of the seventh lens element E7. In the optical imaging lens 2001, the first, second, fourth, fifth, sixth, and seventh spacer elements P1, P2, P4, P5, P6, and P7 are spacers, and the third spacer element P3 is a spacer ring. The above-mentioned spacer elements P1 to P7 can block the entry of external excessive light, make the lens and the lens barrel better bear against, and enhance the structural stability of the optical imaging lens 2001.
As shown in fig. 6B, the plurality of spacer elements of the optical imaging lens 2002 include a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, a sixth spacer element P6, and a seventh spacer element P7. The position distribution of the interval elements P1 to P7 of the optical imaging lens 2002 is the same as the position distribution of the interval elements P1 to P7 of the optical imaging lens 2001 in fig. 6A, and will not be described again. In the optical imaging lens 2002, the first, second, fifth, sixth, and seventh spacer elements P1, P2, P5, P6, and P7 are spacers, and the third and fourth spacer elements P3 and P4 are spacers. The spacer elements P1 to P7 can block the entry of external excessive light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 2002 can be enhanced.
As shown in fig. 6C, the plurality of spacer elements of the optical imaging lens 2003 include a first spacer element P1, a second spacer element P2, a third spacer element P3, a third sub-spacer element P3b, a third sub-spacer element P3C, a fourth spacer element P4, a fourth sub-spacer element P4b, a fifth spacer element P5, a sixth spacer element P6, and a seventh spacer element P7. The position distribution of the spacing elements P1, P2, P5, P6 and P7 of the optical imaging lens 2003 is the same as the position distribution of the spacing elements P1, P2, P5, P6 and P7 of the optical imaging lens 2001 in fig. 6A, and will not be described again. A third spacing element P3, a third sub-spacing element P3b, a third sub-spacing element P3c are arranged between the third lens E3 and the fourth lens E4, wherein the third spacing element P3 is at least partially in contact with the image side of the third lens E3, the third sub-spacing element P3b is arranged between the third spacing element P3 and the third sub-spacing element P3c, and the third sub-spacing element P3c is at least partially in contact with the object side of the fourth lens E4; the fourth spacer element P4 and the fourth sub-spacer element P4b are disposed between the fourth lens element E4 and the fifth lens element E5, wherein the fourth spacer element P4 is at least partially in contact with the image side of the fourth lens element E4, and the fourth sub-spacer element P4b is disposed at the image side of the fourth spacer element P4 and is at least partially in contact with the object side of the fifth lens element E5. In the optical imaging lens 2003, the first, second, third, fourth, fifth, and seventh spacer elements P1, P2, P3c, P4, P5, and P7 are spacers, and the third, fourth, and sixth spacer elements P3b, P4b, and P6 are spacers. The above-mentioned spacer elements P1 to P7 can block the entry of external excessive light, make the lens and the lens barrel better bear against, and enhance the structural stability of the optical imaging lens 2003.
In the present example, the effective focal length F of the optical imaging lenses 2001, 2002, and 2003 is 3.66mm, the maximum half field angle Semi-FOV of the optical imaging lenses 2001, 2002, and 2003 is 79.4 °, and the F-number Fno of the optical imaging lenses 2001, 2002, and 2003 is 2.23.
Table 4 shows basic parameter tables of the lens group 200 of the optical imaging lenses 2001, 2002, and 2003 of embodiment 2, in which the units of the radius of curvature, thickness/distance, and effective focal length are all millimeters (mm). Tables 5-1 and 5-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface profiles can be defined by the formula (1) given in example 1 above.
TABLE 4 Table 4
Face number A4 A6 A8 A10 A12 A14 A16
S1 2.2273E-01 -2.3661E-01 2.2585E-01 -1.7325E-01 1.0327E-01 -4.7031E-02 1.6235E-02
S2 2.4174E-01 -3.0260E-01 2.1868E-01 1.8741E-02 -3.0156E-01 4.3995E-01 -3.6937E-01
S3 5.1477E-02 -1.2796E-01 2.2925E-01 -3.7418E-01 5.6718E-01 -7.7448E-01 8.5650E-01
S4 9.2976E-02 -2.7325E-01 2.6003E+00 -1.4668E+01 5.6142E+01 -1.5030E+02 2.8740E+02
S5 2.6186E-02 -2.2564E-01 3.2975E+00 -2.5647E+01 1.2510E+02 -4.1201E+02 9.5295E+02
S6 1.7372E-02 -7.5006E-02 1.4550E+00 -1.4332E+01 8.0364E+01 -2.9225E+02 7.3104E+02
S7 3.2292E-02 1.5614E-02 -3.0413E-01 1.4561E+00 -4.4158E+00 9.1105E+00 -1.3133E+01
S8 -3.6605E-03 -8.6256E-02 5.3040E-01 -2.1784E+00 5.9549E+00 -1.1298E+01 1.5304E+01
S9 5.8832E-02 1.6176E-02 -2.8166E-01 1.0332E+00 -2.4674E+00 4.1386E+00 -4.9097E+00
S10 2.7229E-02 7.6551E-02 -1.9597E-01 2.7849E-01 -3.3064E-01 3.6615E-01 -3.3219E-01
S11 -3.1769E-02 1.0344E-01 -1.8502E-01 2.1026E-01 -1.7813E-01 1.2277E-01 -6.9401E-02
S12 3.0758E-02 1.8760E-03 -5.1270E-02 1.2547E-01 -1.8362E-01 1.7823E-01 -1.2022E-01
S13 -9.0612E-02 4.7333E-02 -2.9273E-02 1.8281E-02 -1.7604E-02 1.5580E-02 -9.5917E-03
S14 -1.4628E-01 9.6890E-02 -6.0335E-02 2.8095E-02 -9.8092E-03 2.6315E-03 -5.4764E-04
TABLE 5-1
Face number A18 A20 A22 A24 A26 A28 A30
S1 -4.2189E-03 8.1700E-04 -1.1582E-04 1.1652E-05 -7.8688E-07 3.1975E-08 -5.9083E-10
S2 2.0467E-01 -7.6728E-02 1.9040E-02 -2.8916E-03 2.1024E-04 1.9905E-06 -9.4360E-07
S3 -7.1931E-01 4.4540E-01 -1.9860E-01 6.1706E-02 -1.2638E-02 1.5304E-03 -8.2896E-05
S4 -3.9700E+02 3.9663E+02 -2.8360E+02 1.4135E+02 -4.6593E+01 9.1174E+00 -8.0088E-01
S5 -1.5791E+03 1.8851E+03 -1.6079E+03 9.5565E+02 -3.7570E+02 8.7742E+01 -9.2078E+00
S6 -1.2940E+03 1.6366E+03 -1.4702E+03 9.1593E+02 -3.7596E+02 9.1344E+01 -9.9359E+00
S7 1.3388E+01 -9.6468E+00 4.8433E+00 -1.6377E+00 3.4887E-01 -4.0855E-02 1.8565E-03
S8 -1.5005E+01 1.0669E+01 -5.4423E+00 1.9393E+00 -4.5776E-01 6.4228E-02 -4.0495E-03
S9 4.1465E+00 -2.4984E+00 1.0651E+00 -3.1367E-01 6.0658E-02 -6.9273E-03 3.5392E-04
S10 2.2189E-01 -1.0509E-01 3.4736E-02 -7.8304E-03 1.1477E-03 -9.8634E-05 3.7724E-06
S11 3.0913E-02 -1.0377E-02 2.5328E-03 -4.3351E-04 4.9294E-05 -3.3509E-06 1.0334E-07
S12 5.7675E-02 -1.9805E-02 4.8256E-03 -8.1302E-04 8.9889E-05 -5.8568E-06 1.7016E-07
S13 4.0476E-03 -1.1877E-03 2.4235E-04 -3.3706E-05 3.0434E-06 -1.6065E-07 3.7590E-09
S14 8.7817E-05 -1.0655E-05 9.5243E-07 -6.0400E-08 2.5596E-09 -6.4794E-11 7.3935E-13
TABLE 5-2
Table 6 shows the structural parameter tables of the lens barrels and the spacer elements of the optical imaging lenses 2001, 2002, and 2003 of embodiment 2, and each parameter in table 6 has a unit of millimeter (mm).
TABLE 6
Fig. 7A shows on-axis chromatic aberration curves of the optical imaging lenses 2001, 2002, and 2003 of embodiment 2, which represent the convergent focus deviation of light rays of different wavelengths after passing through the lenses. Fig. 7B shows astigmatism curves of the optical imaging lenses 2001, 2002, and 2003 of embodiment 2, which represent meridional image plane curvature and sagittal image plane curvature. As can be seen from fig. 7A to 7B, the optical imaging lenses 2001, 2002, and 2003 given in embodiment 2 can achieve good imaging quality.
Example 3
The optical imaging lenses 3001, 3002, and 3003 according to embodiment 3 of the present application are described below with reference to fig. 8 to 10B. Fig. 8 shows a schematic configuration diagram of a lens group 300 of optical imaging lenses 3001, 3002, and 3003 according to embodiment 3 of the present application. Fig. 9A to 9C show schematic structural diagrams of optical imaging lenses 3001, 3002, and 3003 according to embodiment 3 of the present application.
As shown in fig. 9A to 9C, the optical imaging lenses 3001, 3002, and 3003 each include a lens group 300, a lens barrel, and a plurality of spacer elements.
As shown in fig. 8, the lens assembly 300 sequentially includes, from an object side to an image side, a first lens element E1, a second lens element E2, a third lens element E3, a stop STO, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, an eighth lens element E8, a filter E9 and an image plane S19.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has negative refractive power, wherein an object-side surface S15 thereof is convex and an image-side surface S16 thereof is concave. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
As shown in fig. 9A, the plurality of spacer elements of the optical imaging lens 3001 includes a first spacer element P1, a second spacer element P2, a third spacer element P3, a third sub-spacer element P3b, a fourth spacer element P4, a fifth spacer element P5, a sixth spacer element P6, and a seventh spacer element P7. Wherein the first spacing element P1 is arranged between the first lens E1 and the second lens E2 and is at least partially in contact with the image side of the first lens E1, the second spacing element P2 is arranged between the second lens E2 and the third lens E3 and is at least partially in contact with the image side of the second lens E2, the third spacing element P3 and the third sub-spacing element P3b are arranged between the third lens E3 and the fourth lens E4, and the third spacing element P3 is at least partially in contact with the image side of the third lens E3, the third sub-spacing element P3b is at least partially in contact with the object side of the fourth lens E4, the fourth spacing element P4 is arranged between the fourth lens E4 and the fifth lens E5 and is at least partially in contact with the image side of the fourth lens E4, the fifth spacing element P5 is arranged between the fifth lens E5 and the sixth lens E6 and is at least partially in contact with the image side of the fifth lens E5, the sixth spacing element P6 is arranged between the sixth lens E6 and the seventh lens E7 and is at least partially in contact with the image side of the seventh lens E7 and the seventh lens E7 is arranged between the seventh spacing element P4 and the seventh lens E7 is at least partially in contact with the image side of the seventh lens E7. In the optical imaging lens 3001, the first, second, third, fourth, fifth, sixth, and seventh spacer elements P1, P2, P3, P4, P5, P6, and P7 are spacers, and the third sub-spacer element P3b is a spacer ring. The spacer elements P1 to P7 can block the entry of external excessive light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 3001 can be enhanced.
As shown in fig. 9B, the plurality of spacer elements of the optical imaging lens 3002 includes a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, a sixth spacer element P6, and a seventh spacer element P7. The position distribution of the interval elements P1 to P7 of the optical imaging lens 3002 is the same as the position distribution of the interval elements P1 to P7 of the optical imaging lens 3001 in fig. 9A, and will not be described again. In the optical imaging lens 3002, the first, second, fourth, fifth, sixth, and seventh spacer elements P1, P2, P4, P5, P6, and P7 are spacers, and the third spacer element P3 is a spacer ring. The spacer elements P1 to P7 can block the entry of external excessive light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 3002 can be enhanced.
As shown in fig. 9C, the plurality of spacer elements of the optical imaging lens 3003 includes a first spacer element P1, a second spacer element P2, a third spacer element P3, a third sub-spacer element P3b, a fourth spacer element P4, a fifth spacer element P5, a sixth spacer element P6, and a seventh spacer element P7. The position distribution of the interval elements P1 to P7 of the optical imaging lens 3003 is the same as the position distribution of the interval elements P1 to P7 of the optical imaging lens 3001 in fig. 9A, and will not be described again. In the optical imaging lens 3003, the first, second, third, fourth, fifth, and seventh spacer elements P1, P2, P3, P4, P5, and P7 are spacers, and the third and sixth sub-spacer elements P3b and P6 are spacers. The spacer elements P1 to P7 can block the entry of external excessive light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 3003 can be enhanced.
In this example, the effective focal length F of the optical imaging lenses 3001, 3002, and 3003 is 3.66mm, the maximum half field angle Semi-FOV of the optical imaging lenses 2001, 2002, and 2003 is 76.4 °, and the F-number Fno of the optical imaging lenses 2001, 2002, and 2003 is 2.19.
Table 7 shows basic parameter tables of the lens groups 300 of the optical imaging lenses 3001, 3002, and 3003 of embodiment 3, in which the units of the radius of curvature, thickness/distance, and effective focal length are all millimeters (mm). Tables 8-1 and 8-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface profiles can be defined by the formula (1) given in example 1 above.
TABLE 7
Face number A4 A6 A8 A10 A12 A14 A16
S1 2.1957E-01 -2.2565E-01 2.0954E-01 -1.5731E-01 9.2103E-02 -4.1277E-02 1.4030E-02
S2 2.3818E-01 -2.9171E-01 2.3752E-01 -8.7541E-02 -8.4371E-02 1.6645E-01 -1.3360E-01
S3 4.6121E-02 -1.1649E-01 2.2236E-01 -4.0912E-01 6.9296E-01 -1.0075E+00 1.1468E+00
S4 8.6192E-02 -2.1726E-01 2.0470E+00 -1.1273E+01 4.2549E+01 -1.1311E+02 2.1570E+02
S5 2.8559E-02 -2.6913E-01 3.6502E+00 -2.7303E+01 1.2977E+02 -4.1913E+02 9.5392E+02
S6 1.3357E-02 -1.7601E-02 7.2343E-01 -8.7610E+00 5.3137E+01 -2.0191E+02 5.2072E+02
S7 2.8926E-02 4.3342E-02 -5.0133E-01 2.3825E+00 -7.3125E+00 1.5367E+01 -2.2711E+01
S8 -3.3569E-03 -1.0135E-01 6.1359E-01 -2.4619E+00 6.5871E+00 -1.2251E+01 1.6290E+01
S9 4.9521E-02 1.3584E-02 -2.4715E-01 9.1750E-01 -2.2409E+00 3.8512E+00 -4.6623E+00
S10 2.1044E-02 9.6494E-02 -2.2185E-01 2.6230E-01 -2.3611E-01 2.2347E-01 -2.0611E-01
S11 -3.4396E-02 1.3282E-01 -2.5089E-01 2.9277E-01 -2.4687E-01 1.6482E-01 -8.9946E-02
S12 2.9587E-02 8.6581E-03 -5.2803E-02 1.0555E-01 -1.3948E-01 1.2758E-01 -8.2919E-02
S13 -1.0408E-01 6.5862E-02 -4.9612E-02 3.3989E-02 -2.5928E-02 1.8191E-02 -9.7163E-03
S14 -1.5558E-01 1.0647E-01 -6.7009E-02 3.0876E-02 -1.0442E-02 2.6663E-03 -5.2399E-04
TABLE 8-1
TABLE 8-2
Table 9 shows the structural parameter tables of the lens barrels and the spacer elements of the optical imaging lenses 3001, 3002, and 3003 of embodiment 3, and each parameter in table 9 has a unit of millimeter (mm).
Structural parameters Optical imaging lens 3001 Optical imaging lens 3002 Optical imaging lens 3003
D1m 5.8000 5.8000 5.8000
D2m 5.9000 5.9000 5.9000
D3m 5.0235 5.8321 5.0235
d3 2.0784 2.0784 2.0784
D4m 5.2235 5.2235 5.2235
D5m 6.6000 6.6000 5.4825
D6m 7.7000 7.7000 6.6307
D7m 9.3000 9.3000 9.3000
d0s 6.5230 6.5230 6.5230
d0m 10.0270 10.0270 10.0270
D0m 10.6000 10.6000 10.6000
EP23 0.3579 0.3579 0.3579
CP3 0.0180 0.4103 0.0180
EP34 0.8909 0.4985 0.8909
CP6 0.0180 0.0180 0.3095
EP67 1.1634 1.1634 1.1634
CP7 0.0200 0.0200 0.0200
L 7.3500 7.3500 7.3500
TABLE 9
Fig. 10A shows on-axis chromatic aberration curves of the optical imaging lenses 3001, 3002, and 3003 of embodiment 3, which represent convergent focus deviations of light rays of different wavelengths after passing through the lenses. Fig. 10B shows astigmatism curves of the optical imaging lenses 3001, 3002, and 3003 of embodiment 3, which represent meridional image surface curvature and sagittal image surface curvature. As can be seen from fig. 10A to 10B, the optical imaging lenses 3001, 3002, and 3003 given in embodiment 3 can achieve good imaging quality.
In summary, the optical imaging lenses 1001, 1002, and 1003 of embodiment 1, the optical imaging lenses 2001, 2002, and 2003 of embodiment 2, and the optical imaging lenses 3001, 3002, and 3003 of embodiment 3 satisfy the relationships shown in table 10, respectively.
Conditional/optical imaging lens 1001 1002 1003 2001 2002 2003 3001 3002 3003
f×Tan(Semi-FOV)/d3 6.42 6.42 6.42 9.55 9.55 9.59 7.29 7.29 7.29
Tan(Semi-FOV)/((D0m-d0s)/f) 2.36 3.02 3.02 5.29 5.29 4.49 3.72 3.72 3.72
(d0m-d3)/EPD×(d0m/f) 18.01 16.17 16.17 13.59 13.59 14.03 13.04 13.04 13.04
d0s/EPD×L/(d0m-d0s) 8.77 10.15 10.18 10.60 10.60 10.14 8.19 8.19 8.19
CT6/CP6+CT7/CP7 89.50 89.50 27.80 84.53 84.53 17.38 87.29 87.29 21.68
|f6+f7|/(CP6+EP67+CP7) 14.94 14.94 15.26 2.88 2.88 2.52 3.51 3.51 2.82
(CT6+CT7)/EP67 1.95 1.95 3.35 1.28 1.28 1.41 1.38 1.38 1.38
f3/EP23+f4/EP34 17.31 22.74 21.84 26.76 30.56 24.57 23.88 27.92 23.88
|CT3-EP23|/|CT4-EP34| 0.92 0.99 0.12 0.48 0.31 2.17 2.06 0.46 2.06
d3/|CP3+EP34-CT4| 44.74 12.64 13.52 20.82 32.94 38.32 23.19 23.19 23.19
D7m/(∑Dim/6) 1.39 1.40 1.29 1.47 1.48 1.54 1.54 1.51 1.64
Table 10
The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but also covers other technical solutions which may be formed by any combination of the features described above or their equivalents without departing from the inventive concept. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims (14)

1. An optical imaging lens, comprising:
the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens in sequence from an object side to an image side along an optical axis;
a plurality of spacer elements, at least one spacer element of the plurality of spacer elements being provided between any adjacent two lenses of the first to eighth lenses; and
A lens barrel for accommodating the lens group and the plurality of spacer elements;
wherein,
the number of lenses having optical power in the optical imaging lens is eight;
the first lens has negative optical power;
the focal power of at least four lenses from the second lens to the eighth lens is positive, and the object side surfaces of at least two lenses from the first lens to the eighth lens are concave surfaces;
the plurality of spacing elements includes a third spacing element disposed between the third lens and the fourth lens and at least partially in contact with an image side surface of the third lens;
the effective focal length f of the optical imaging lens, the maximum half field angle Semi-FOV of the optical imaging lens and the minimum inner diameter d3 of the third spacer element satisfy: 5.0< f×tan (Semi-FOV)/d 3 is less than or equal to 10; and
the inner diameter d0s of the object side surface of the lens barrel, the inner diameter d0m of the image side surface of the lens barrel, the entrance pupil diameter EPD of the optical imaging lens and the maximum length L of the lens barrel satisfy: d0s/EPD×L/(d 0m-d0 s) <11.0.
2. The optical imaging lens according to claim 1, wherein edge regions of at least two adjacent lenses of the fourth lens to the sixth lens are partially held against each other.
3. The optical imaging lens according to claim 1, wherein the fifth lens has negative power and the eighth lens has negative power.
4. The optical imaging lens of claim 1 wherein the object side and image side of at least three lenses of the lens group are convex at the paraxial region.
5. The optical imaging lens according to claim 1, wherein abbe numbers of at most three lenses in the lens group are less than 40.
6. The optical imaging lens according to any one of claims 1 to 5, wherein a maximum half field angle Semi-FOV of the optical imaging lens, an effective focal length f of the optical imaging lens, an outer diameter D0m of an image side surface of the lens barrel, and an inner diameter D0s of an object side surface of the lens barrel satisfy: 2.0< tan (Semi-FOV)/((D0 m-D0 s)/f) <5.5.
7. The optical imaging lens according to any one of claims 1 to 5, wherein an effective focal length f of the optical imaging lens, an entrance pupil diameter EPD of the optical imaging lens, an inner diameter d0m of an image side surface of the lens barrel, and a minimum inner diameter d3 of the third spacer element satisfy: 10< (d 0m-d 3)/EPD× (d 0 m/f) <20.
8. The optical imaging lens of any of claims 1-5, wherein the plurality of spacer elements further comprises: a sixth spacing element located between and at least partially contacting the image side of the sixth lens and a seventh spacing element located between and at least partially contacting the image side of the seventh lens, wherein,
A center thickness CT6 of the sixth lens on the optical axis, a center thickness CT7 of the seventh lens on the optical axis, a maximum thickness CP6 of the sixth spacer element, a maximum thickness CP7 of the seventh spacer element satisfy: 15< CT6/CP6+CT7/CP7 is less than or equal to 90.
9. The optical imaging lens of any of claims 1-5, wherein the plurality of spacer elements further comprises: a sixth spacing element located between and at least partially contacting the image side of the sixth lens and a seventh spacing element located between and at least partially contacting the image side of the seventh lens, wherein,
the effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens, the maximum thickness CP6 of the sixth spacing element, the maximum thickness CP7 of the seventh spacing element, and the distance EP67 between the image side surface of the sixth spacing element and the object side surface of the seventh spacing element along the optical axis satisfy: 2.0< |f6+f7|/(CP6+EP 67+CP7) <16.
10. The optical imaging lens of any of claims 1-5, wherein the plurality of spacer elements further comprises: a sixth spacing element located between and at least partially contacting the image side of the sixth lens and a seventh spacing element located between and at least partially contacting the image side of the seventh lens, wherein,
The center thickness CT6 of the sixth lens element on the optical axis, the center thickness CT7 of the seventh lens element on the optical axis, and the distance EP67 between the image side surface of the sixth spacer element and the object side surface of the seventh spacer element along the optical axis satisfy: 1.0< (CT6+CT7)/EP 67<3.5.
11. The optical imaging lens of any of claims 1-5, wherein the plurality of spacer elements further comprises: a second spacing element located between the second lens and the third lens and at least partially in contact with the image side of the second lens, and a fourth spacing element located between the fourth lens and the fifth lens and at least partially in contact with the image side of the fourth lens, wherein,
the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the distance EP23 from the image side surface of the second spacing element to the object side surface of the third spacing element along the optical axis, and the distance EP34 from the image side surface of the third spacing element to the object side surface of the fourth spacing element along the optical axis satisfy: 15< f3/EP23+f4/EP 34.ltoreq.31.
12. The optical imaging lens of any of claims 1-5, wherein the plurality of spacer elements further comprises: a second spacing element located between the second lens and the third lens and at least partially in contact with the image side of the second lens, and a fourth spacing element located between the fourth lens and the fifth lens and at least partially in contact with the image side of the fourth lens, wherein,
The center thickness CT3 of the third lens element on the optical axis, the center thickness CT4 of the fourth lens element on the optical axis, the distance EP23 from the image side surface of the second spacer element to the object side surface of the third spacer element along the optical axis, and the distance EP34 from the image side surface of the third spacer element to the object side surface of the fourth spacer element along the optical axis satisfy: 0< |CT3-EP23|/|CT4-EP34| <2.5.
13. The optical imaging lens of any of claims 1-5, wherein the plurality of spacer elements further comprises: a fourth spacing element located between the fourth lens and the fifth lens and at least partially in contact with an image side of the fourth lens, wherein,
the minimum inner diameter d3 of the third spacing element, the maximum thickness CP3 of the third spacing element, the distance EP34 from the image side surface of the third spacing element to the object side surface of the fourth spacing element along the optical axis, and the center thickness CT4 of the fourth lens on the optical axis satisfy: 10< d3/|CP3+EP34-CT 4|is less than or equal to 45.
14. The optical imaging lens of any of claims 1-5, wherein the plurality of spacer elements further comprises: a first spacer element, a second spacer element, a fourth spacer element, a fifth spacer element, a sixth spacer element and a seventh spacer element, wherein the first spacer element is located between the first lens and the second lens and is at least partially in contact with the image side of the first lens, the second spacer element is located between the second lens and the third lens and is at least partially in contact with the image side of the second lens, the fourth spacer element is located between the fourth lens and the fifth lens and is at least partially in contact with the image side of the fourth lens, the fifth spacer element is located between the fifth lens and the sixth lens and is at least partially in contact with the image side of the fifth lens, the sixth spacer element is located between the sixth lens and the seventh lens and is at least partially in contact with the image side of the sixth lens, the seventh spacer element is located between the seventh lens and the eighth lens and is at least partially in contact with the image side of the seventh lens,
The sum Σdim of the outer diameters D7m of the image sides of the seventh spacing element, the outer diameters of the image sides of the first to sixth spacing elements satisfies: 1.2< D7 m/(ΣDim/6) <1.8.
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CN112485895A (en) * 2020-12-14 2021-03-12 浙江舜宇光学有限公司 Optical imaging lens group
JP2021182081A (en) * 2020-05-19 2021-11-25 ＯＦＩＬＭ．Ｊａｐａｎ株式会社 Imaging lens, imaging apparatus and information terminal
CN114257713A (en) * 2020-09-24 2022-03-29 江西晶超光学有限公司 Optical lens, camera module and electronic equipment

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109116520A (en) * 2018-10-22 2019-01-01 浙江舜宇光学有限公司 Optical imaging lens
CN110646925A (en) * 2019-11-13 2020-01-03 浙江舜宇光学有限公司 Optical imaging lens
JP2021182081A (en) * 2020-05-19 2021-11-25 ＯＦＩＬＭ．Ｊａｐａｎ株式会社 Imaging lens, imaging apparatus and information terminal
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