CN109031620B - Optical imaging lens group - Google Patents

Optical imaging lens group Download PDF

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Publication number
CN109031620B
CN109031620B CN201811000731.0A CN201811000731A CN109031620B CN 109031620 B CN109031620 B CN 109031620B CN 201811000731 A CN201811000731 A CN 201811000731A CN 109031620 B CN109031620 B CN 109031620B
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lens
optical imaging
image
optical
satisfy
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CN109031620A (en
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杨健
计云兵
周鑫
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Priority to PCT/CN2019/096318 priority patent/WO2020042799A1/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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

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

The application discloses an optical imaging lens group, this lens group includes along the optical axis from the thing side to the image side in proper order: 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. The first lens has positive focal power, and the object side surface of the first lens is a convex surface; the fifth lens has negative focal power, and the image side surface of the fifth lens is a concave surface; the object side surface of the sixth lens is a concave surface; the object side surface of the seventh lens is a convex surface; the eighth lens has positive focal power; and an air space is arranged between any two adjacent lenses of the first lens to the eighth lens.

Description

Optical imaging lens group
Technical Field
The present application relates to an optical imaging lens assembly, and more particularly, to an optical imaging lens assembly including eight lenses.
Background
In recent years, with the rapid update of portable electronic products such as mobile phones and tablet computers, the requirements of the market for product-side imaging lenses are increasingly diversified. At present, in addition to the miniaturization of the imaging lens to be suitable for the portable electronic products, the imaging lens is required to have the features of high pixel, high resolution, long focal length, and the like to meet the imaging requirements of various fields.
In addition, with the continuous progress of semiconductor technology, large-area array and small-pixel electric coupling devices (CCD) are coming out, and the development is going to be larger in area array and smaller in pixel. This means that the optical imaging lens set used in the optical imaging lens set is also developed to have higher pixels and better imaging quality. Meanwhile, in order to meet the commercialization demand, the optical imaging lens group also has corresponding requirements in terms of miniaturization, low processing cost and the like.
Disclosure of Invention
The present application provides an optical imaging lens assembly, such as a telephoto lens, suitable for portable electronic products, which at least solves or partially solves at least one of the above-mentioned disadvantages of the prior art.
In one aspect, the present application provides an optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprising: 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. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the fifth lens can have negative focal power, and the image side surface of the fifth lens can be concave; the object side surface of the sixth lens can be a concave surface; the object side surface of the seventh lens element can be convex; the eighth lens may have a positive optical power; and any two adjacent lenses of the first lens to the eighth lens can have an air space therebetween.
In one embodiment, a central thickness CT1 of the first lens on the optical axis, an air interval T12 of the first lens and the second lens on the optical axis, an air interval T23 of the second lens and the third lens on the optical axis, an air interval T34 of the third lens and the fourth lens on the optical axis, and an air interval T45 of the fourth lens and the fifth lens on the optical axis satisfy 0.5 < (T12+ T23+ T34+ T45)/CT1 < 1.5.
In one embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens can satisfy 2.5 < f2/f1 < 5.
In one embodiment, the radius of curvature R2 of the image-side surface of the first lens and the effective focal length f5 of the fifth lens satisfy-4 < R2/f5 < -3.
In one embodiment, a radius of curvature R13 of the object-side surface of the seventh lens and a radius of curvature R14 of the image-side surface of the seventh lens may satisfy 2 < R13/R14 < 3.
In one embodiment, the total effective focal length f of the optical imaging lens group and the radius of curvature R10 of the image side surface of the fifth lens element satisfy 1.8 < f/R10 < 2.5.
In one embodiment, an air interval T67 of the sixth lens and the seventh lens on the optical axis and an air interval T12 of the first lens and the second lens on the optical axis may satisfy 1.5 < T67/T12/10 < 2.5.
In one embodiment, the maximum effective half caliber DT52 of the image side surface of the fifth lens and the maximum effective half caliber DT82 of the image side surface of the eighth lens satisfy 2 < DT82/DT52 < 3.
In one embodiment, the maximum half field angle HFOV of the optical imaging lens set can satisfy HFOV ≦ 30.
In one embodiment, the combined focal length f78 of the seventh and eighth lenses and the combined focal length f12345 of the first, second, third, fourth, and fifth lenses may satisfy-3.5 < f78/f12345 < -1.
In another aspect, the present application provides an optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprising: 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. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the fifth lens can have negative focal power, and the image side surface of the fifth lens can be concave; the object side surface of the sixth lens can be a concave surface; the object side surface of the seventh lens element can be convex; the eighth lens may have a positive optical power; and the effective focal length f1 of the first lens and the effective focal length f2 of the second lens can satisfy 2.5 < f2/f1 < 5.
In another aspect, the present application provides an optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprising: 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. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the fifth lens can have negative focal power, and the image side surface of the fifth lens can be concave; the object side surface of the sixth lens can be a concave surface; the object side surface of the seventh lens element can be convex; the eighth lens may have a positive optical power; and the curvature radius R2 of the image side surface of the first lens and the effective focal length f5 of the fifth lens can satisfy-4 < R2/f5 < -3.
In another aspect, the present application provides an optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprising: 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. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the fifth lens can have negative focal power, and the image side surface of the fifth lens can be concave; the object side surface of the sixth lens can be a concave surface; the object side surface of the seventh lens element can be convex; the eighth lens may have a positive optical power; and a combined focal length f78 of the seventh lens and the eighth lens and a combined focal length f12345 of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens may satisfy-3.5 < f78/f12345 < -1.
In another aspect, the present application provides an optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprising: 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. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the fifth lens can have negative focal power, and the image side surface of the fifth lens can be concave; the object side surface of the sixth lens can be a concave surface; the object side surface of the seventh lens element can be convex; the eighth lens may have a positive optical power; and the curvature radius R13 of the object side surface of the seventh lens and the curvature radius R14 of the image side surface of the seventh lens can satisfy 2 < R13/R14 < 3.
In another aspect, the present application provides an optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprising: 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. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the fifth lens can have negative focal power, and the image side surface of the fifth lens can be concave; the object side surface of the sixth lens can be a concave surface; the object side surface of the seventh lens element can be convex; the eighth lens may have a positive optical power; and the total effective focal length f of the optical imaging lens group and the curvature radius R10 of the image side surface of the fifth lens element can satisfy 1.8 < f/R10 < 2.5.
In another aspect, the present application provides an optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprising: 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. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the fifth lens can have negative focal power, and the image side surface of the fifth lens can be concave; the object side surface of the sixth lens can be a concave surface; the object side surface of the seventh lens element can be convex; the eighth lens may have a positive optical power; and an air interval T67 of the sixth lens and the seventh lens on the optical axis and an air interval T12 of the first lens and the second lens on the optical axis may satisfy 1.5 < T67/T12/10 < 2.5.
In another aspect, the present application provides an optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprising: 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. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the fifth lens can have negative focal power, and the image side surface of the fifth lens can be concave; the object side surface of the sixth lens can be a concave surface; the object side surface of the seventh lens element can be convex; the eighth lens may have a positive optical power; and the maximum effective half-aperture DT52 of the image side surface of the fifth lens and the maximum effective half-aperture DT82 of the image side surface of the eighth lens can satisfy 2 < DT82/DT52 < 3.
This application has adopted eight lens, through the focal power of each lens of rational distribution, face type, the center thickness of each lens and the epaxial interval between each lens etc for above-mentioned optical imaging lens group has at least one beneficial effect such as heavy-calibre, long focus, high imaging quality and miniaturization.
Drawings
Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic structural diagram of an optical imaging lens assembly according to embodiment 1 of the present application;
fig. 2A to 2D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens assembly of example 1;
FIG. 3 is a schematic structural diagram of an optical imaging lens assembly according to embodiment 2 of the present application;
fig. 4A to 4D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens assembly of example 2;
FIG. 5 is a schematic diagram showing the structure of an optical imaging lens assembly according to embodiment 3 of the present application;
FIGS. 6A to 6D are a plot of axial chromatic aberration, astigmatism, distortion and chromatic aberration of magnification of the optical imaging lens assembly of example 3;
FIG. 7 is a schematic diagram showing the structure of an optical imaging lens assembly according to embodiment 4 of the present application;
figures 8A-8D show the on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the chromatic aberration of magnification curve, respectively, of the optical imaging lens assembly of example 4;
FIG. 9 is a schematic diagram showing the structure of an optical imaging lens assembly according to embodiment 5 of the present application;
10A-10D show axial chromatic aberration, astigmatism, distortion and magnification chromatic aberration curves, respectively, of an optical imaging lens assembly of example 5;
FIG. 11 is a schematic diagram showing the structure of an optical imaging lens assembly according to embodiment 6 of the present application;
12A-12D show axial chromatic aberration, astigmatism, distortion and chromatic aberration of the optical imaging lens assembly of example 6;
FIG. 13 is a schematic diagram showing the structure of an optical imaging lens assembly according to embodiment 7 of the present application;
14A-14D show axial chromatic aberration, astigmatism, distortion and chromatic aberration of the optical imaging lens assembly of example 7;
FIG. 15 is a schematic diagram showing the structure of an optical imaging lens assembly according to embodiment 8 of the present application;
fig. 16A to 16D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens assembly of example 8.
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 the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present 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 this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and 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, it means that 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 called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" 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. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "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 the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The features, principles, and other aspects of the present application are described in detail below.
In order to achieve clearer imaging in telephoto shooting, an optical imaging lens set with a longer focal length must be used, and the total length of the optical imaging lens set must be controlled in order to meet the commercial demand for miniaturization and low cost.
The aspheric surface can remarkably improve image quality, reduce aberration, and is beneficial to reducing the number of lenses so as to realize the miniaturization of the lens group. Therefore, the use of aspheric lenses is an important means to alleviate the conflict between the telephoto and the total optical length of the lens set. The existing optical imaging lens group has an all-glass structure, an all-plastic structure and a glass-plastic mixed structure, and with the occurrence of precision machining, the industrial production of the aspheric surface can be realized. The precision machining technology not only comprises the direct grinding aspheric surface machining of the glass material, but also comprises the die-casting aspheric surface machining of the glass material and the injection molding aspheric surface machining of the plastic material. Compared with glass materials, plastic materials are lower in cost and easier to process, and are easier to realize commercial application.
The optical imaging lens group according to an exemplary embodiment of the present application may include, for example, eight lenses having optical powers, i.e., 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. The eight lenses are arranged in sequence from an object side to an image side along an optical axis, and an air space is formed between every two adjacent lenses.
In an exemplary embodiment, the first lens may have a positive optical power, and the object-side surface thereof may be convex; the second lens has positive focal power or negative focal power; the third lens has positive focal power or negative focal power; the fourth lens has positive focal power or negative focal power; the fifth lens can have negative focal power, and the image side surface of the fifth lens can be concave; the sixth lens has positive focal power or negative focal power, and the object side surface of the sixth lens can be a concave surface; the seventh lens has positive focal power or negative focal power, and the object side surface of the seventh lens can be a convex surface; and the eighth lens may have a positive optical power. The focal power and the surface type of each lens are reasonably arranged to form an eight-piece type long focal structure and realize large aperture and high imaging quality.
In an exemplary embodiment, the image side surface of the first lens may be concave.
In an exemplary embodiment, the second lens may have a positive optical power, and the object-side surface thereof may be convex.
In an exemplary embodiment, an image side surface of the sixth lens may be convex.
In an exemplary embodiment, the seventh lens may have a negative optical power, and the image-side surface thereof may be concave.
In an exemplary embodiment, the object side surface of the eighth lens may be a concave surface.
In an exemplary embodiment, the optical imaging lens assembly of the present application may satisfy the conditional expression HFOV ≦ 30 °, wherein HFOV is the maximum half field angle of the optical imaging lens assembly. More specifically, the HFOV further satisfies HFOV ≦ 25, for example, 22 ≦ HFOV ≦ 23. When the half field angle of the optical imaging lens group is less than 30 degrees, the refraction of the incident light ray on the first lens can be more relaxed, the excessive increase of aberration can be prevented, and the image quality can be improved.
In an exemplary embodiment, the optical imaging lens assembly of the present application may satisfy the conditional expression 0.5 < (T12+ T23+ T34+ T45)/CT1 x 5 < 1.5, where CT1 is a central thickness of the first lens on the optical axis, T12 is an air space between the first lens and the second lens on the optical axis, T23 is an air space between the second lens and the third lens on the optical axis, T34 is an air space between the third lens and the fourth lens on the optical axis, and T45 is an air space between the fourth lens and the fifth lens on the optical axis. More specifically, T12, T23, T34, T45 and CT1 further satisfy 0.74 ≦ (T12+ T23+ T34+ T45)/CT1 ≦ 5 ≦ 1.33. When the conditional expression 0.5 < (T12+ T23+ T34+ T45)/CT1 x 5 < 1.5 is satisfied, the optical total length and the processing difficulty of the optical imaging lens set are balanced. When the value of (T12+ T23+ T34+ T45)/CT1 × 5 is too large, the total optical length of the lens set is too long; when the value of (T12+ T23+ T34+ T45)/CT1 × 5 is too small, the difficulty of processing the lens assembly is increased, which is not favorable for assembly.
In an exemplary embodiment, the optical imaging lens set of the present application may satisfy the conditional expression 2.5 < f2/f1 < 5, where f1 is the effective focal length of the first lens element, and f2 is the effective focal length of the second lens element. More specifically, f1 and f2 can further satisfy 2.98. ltoreq. f2/f 1. ltoreq.4.47. The first lens bears larger focal power, and the second lens bears smaller focal power, so that the chromatic aberration is improved, the total optical length of the lens group is reduced, the back focal length is increased and the like.
In an exemplary embodiment, the optical imaging lens group of the application can satisfy the conditional expression-4 < R2/f5 < -3, wherein R2 is the curvature radius of the image side surface of the first lens, and f5 is the effective focal length of the fifth lens. More specifically, R2 and f5 further satisfy-3.73. ltoreq. R2/f 5. ltoreq.3.01. The conditional expression of-4 < R2/f5 < -3 is satisfied, the field curvature and the distortion of the lens group are improved, and the processing difficulty of the fifth lens is reasonably controlled.
In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the conditional expression-3.5 < f78/f12345 < -1, where f78 is the combined focal length of the seventh lens and the eighth lens, and f12345 is the combined focal length of the first lens, the second lens, the third lens, the fourth lens and the fifth lens. More specifically, f78 and f12345 further satisfy-3.17. ltoreq. f78/f 12345. ltoreq. 1.38. The first five lenses share the main focal power, and the seventh lens and the eighth lens are matched to improve the chromatic aberration of the lens group and improve the image definition.
In an exemplary embodiment, the optical imaging lens group of the application can satisfy the conditional expression 2 < R13/R14 < 3, wherein R13 is a radius of curvature of an object side surface of the seventh lens element, and R14 is a radius of curvature of an image side surface of the seventh lens element. More specifically, R13 and R14 may further satisfy 2.12. ltoreq. R13/R14. ltoreq.2.99. The conditional expression 2 < R13/R14 < 3 is satisfied, the seventh lens can be prevented from being bent too much, the processing difficulty can be reduced, and the field curvature of the lens group can be reasonably controlled.
In an exemplary embodiment, the optical imaging lens assembly of the present application may satisfy the conditional expression 1.8 < f/R10 < 2.5, where f is the total effective focal length of the optical imaging lens assembly, and R10 is the radius of curvature of the image-side surface of the fifth lens element. More specifically, f and R10 further satisfy 1.94. ltoreq. f/R10. ltoreq.2.46. The ratio range of f and R10 is reasonably controlled, the angle of the main ray is favorably regulated and controlled, and the CRA of the matched chip is further favorably realized.
In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the conditional expression 1.5 < T67/T12/10 < 2.5, where T67 is an air space between the sixth lens and the seventh lens on the optical axis, and T12 is an air space between the first lens and the second lens on the optical axis. More specifically, T67 and T12 can further satisfy 1.90. ltoreq. T67/T12/10. ltoreq.2.35. When the ratio of T67 to T12 is too large, assembly of the lens set is not facilitated; when the ratio of T67 to T12 is too small, the total optical length of the lens assembly is too long, which is not suitable for miniaturization. The reasonable control of the ratio of T67 to T12 is beneficial to balancing the assembly difficulty and the total optical length of the lens set.
In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the conditional expression 2 < DT82/DT52 < 3, where DT52 is the maximum effective half aperture of the image-side surface of the fifth lens element, and DT82 is the maximum effective half aperture of the image-side surface of the eighth lens element. More specifically, DT82 and DT52 may further satisfy 2.18 ≦ DT82/DT52 ≦ 2.73. When the ratio of DT82 to DT52 is too large, assembly of the lens set is not facilitated; when the ratio of DT82 to DT52 is too small, it is not favorable to correct off-axis aberration, and high image quality cannot be achieved. The reasonable control of the ratio of DT82 to DT52 helps balance the assembly difficulty and the imaging quality of the lens set.
In an exemplary embodiment, the optical imaging lens group may further include a diaphragm to improve the imaging quality of the lens. The diaphragm may be disposed at any position between the object side and the image side as necessary.
Optionally, the optical imaging lens group may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.
The optical imaging lens assembly according to the above embodiments of the present application may employ a plurality of lenses, such as the eight lenses described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the machinability of the lens can be improved, so that the optical imaging lens group is more beneficial to production and processing and can be suitable for portable electronic products. The optical imaging lens group with the configuration also has the advantages of long focal length, large caliber, high imaging quality and the like.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric 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 better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.
However, it will be appreciated by those skilled in the art that the number of lenses comprising the set of optical imaging lenses can be varied to achieve the various results and advantages described herein without departing from the claimed technology. For example, although eight lenses are exemplified in the embodiment, the optical imaging lens group is not limited to include eight lenses. The optical imaging lens assembly can also include other numbers of lenses, if desired.
Specific examples of the optical imaging lens group applicable to the above embodiments are further described below with reference to the drawings.
Example 1
An optical imaging lens set according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 is a schematic structural diagram of an optical imaging lens assembly according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens assembly according to the present exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
Table 1 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens element of the optical imaging lens group of example 1, wherein the radius of curvature and the thickness are both in millimeters (mm).
Figure BDA0001782895760000111
TABLE 1
As can be seen from table 1, the object-side surface and the image-side surface of any one of the first lens element E1 through the eighth lens element E8 are aspheric. In the present embodiment, the profile x of each aspheric lens can be defined using, but not limited to, the following aspheric formula:
Figure BDA0001782895760000121
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S16 used in example 14、A6、A8、A10、A12、A14And A16。
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -6.9224E-03 2.0244E-03 -2.8525E-03 -5.0851E-04 6.6609E-04 -4.7478E-04 7.6751E-05
S2 6.8498E-02 3.4741E-03 -7.1297E-02 6.1839E-02 -2.2045E-02 3.3507E-03 -1.6131E-04
S3 7.5167E-02 -1.5422E-03 -6.5954E-02 5.6667E-02 -1.6915E-02 1.5851E-03 0.0000E+00
S4 -4.0586E-02 1.9484E-01 -3.5959E-01 3.3302E-01 -1.6586E-01 4.2595E-02 -4.4255E-03
S5 -4.1439E-02 2.3757E-01 -4.9045E-01 4.9355E-01 -2.6394E-01 7.2481E-02 -8.0840E-03
S6 3.6477E-02 -1.0779E-02 -1.3159E-01 2.1961E-01 -1.5765E-01 5.4545E-02 -7.4555E-03
S7 5.1890E-02 -1.7011E-02 7.8256E-05 -1.1032E-02 9.6395E-03 0.0000E+00 0.0000E+00
S8 -7.9465E-03 9.7574E-02 -2.1539E-01 1.7739E-01 -5.1844E-02 8.6922E-04 0.0000E+00
S9 1.4424E-02 -7.2246E-02 9.4352E-02 -2.4741E-02 -1.0131E-02 0.0000E+00 0.0000E+00
S10 6.8880E-02 -1.7018E-01 3.9269E-01 -3.1764E-01 1.2761E-01 0.0000E+00 0.0000E+00
S11 -5.6461E-02 -1.1523E-01 8.8655E-02 -2.4684E-02 3.0035E-02 -4.7455E-02 0.0000E+00
S12 -1.5775E-02 -3.9619E-02 -2.8767E-03 1.1599E-01 -1.0360E-01 2.7102E-02 0.0000E+00
S13 -1.4250E-01 6.5572E-02 -4.1466E-02 2.7747E-02 -1.0997E-02 2.1581E-03 -1.5796E-04
S14 -2.0090E-01 1.1755E-01 -7.5366E-02 3.3728E-02 -9.9217E-03 1.6586E-03 -1.1923E-04
S15 -6.7893E-02 4.1882E-02 -2.0194E-02 6.5601E-03 -1.4638E-03 2.0397E-04 -1.2695E-05
S16 -7.0480E-02 3.2017E-02 -1.5093E-02 5.5478E-03 -1.3122E-03 1.7130E-04 -9.2240E-06
TABLE 2
Table 3 shows ImgH, which is half the diagonal length of the effective pixel region on the image forming surface S19, the distance TTL on the optical axis from the object side surface S1 of the first lens element E1 to the image forming surface S19, the maximum half field angle HFOV, the total effective focal length f of the optical imaging lens group, and the effective focal lengths f1 to f8 of the respective lens elements in example 1.
Figure BDA0001782895760000122
Figure BDA0001782895760000131
TABLE 3
The optical imaging lens group in the embodiment 1 satisfies the following conditions:
(T12+ T23+ T34+ T45)/CT1 × 5 ═ 1.28, where CT1 is the central thickness of the first lens E1 on the optical axis, T12 is the air space between the first lens E1 and the second lens E2 on the optical axis, T23 is the air space between the second lens E2 and the third lens E3 on the optical axis, T34 is the air space between the third lens E3 and the fourth lens E4 on the optical axis, and T45 is the air space between the fourth lens E4 and the fifth lens E5 on the optical axis;
f2/f1 is 3.29, wherein f1 is the effective focal length of the first lens E1, and f2 is the effective focal length of the second lens E2;
r2/f5 is-3.01, where R2 is the radius of curvature of the image-side surface S2 of the first lens E1, and f5 is the effective focal length of the fifth lens E5;
f78/f12345 is-2.99, where f78 is the combined focal length of the seventh lens E7 and the eighth lens E8, and f12345 is the combined focal length of the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5;
R13/R14 is 2.99, where R13 is the radius of curvature of the object-side surface S13 of the seventh lens E7, and R14 is the radius of curvature of the image-side surface S14 of the seventh lens E7;
f/R10 is 2.07, where f is the total effective focal length of the optical imaging lens group, and R10 is the radius of curvature of the image-side surface S10 of the fifth lens element E5;
T67/T12/10 is 2.00, where T67 is an air space on the optical axis of the sixth lens E6 and the seventh lens E7, and T12 is an air space on the optical axis of the first lens E1 and the second lens E2;
DT82/DT52 is 2.66, where DT52 is the maximum effective half-aperture of the image-side surface S10 of the fifth lens E5, and DT82 is the maximum effective half-aperture of the image-side surface S16 of the eighth lens E8.
Fig. 2A shows an axial chromatic aberration curve of the optical imaging lens assembly of example 1, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. FIG. 2B shows the astigmatism curves for the optical imaging lens assembly of example 1 representing meridional and sagittal field curvatures. FIG. 2C is a distortion curve for the optical imaging lens assembly of example 1 showing the distortion magnitude for different image heights. Fig. 2D shows a chromatic aberration of magnification curve of the optical imaging lens assembly of embodiment 1, which represents the deviation of different image heights of light rays on the imaging surface after passing through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens assembly of embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens set according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. FIG. 3 is a schematic structural diagram of an optical imaging lens assembly according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens assembly according to the present exemplary embodiment of the present application, in order from an object side to an image side, comprises: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
Table 4 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens element of the optical imaging lens group of example 2, wherein the radius of curvature and the thickness are both in millimeters (mm).
Figure BDA0001782895760000141
Figure BDA0001782895760000151
TABLE 4
As is clear from table 4, in example 2, both the object-side surface and the image-side surface of any one of the first lens element E1 through the eighth lens element E8 are aspheric. Table 5 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -6.6698E-03 1.7806E-03 -2.0060E-03 -1.5364E-03 1.2572E-03 -6.3874E-04 9.5044E-05
S2 6.9143E-02 2.4482E-03 -6.9717E-02 6.0001E-02 -2.0848E-02 2.9668E-03 -1.1399E-04
S3 7.5245E-02 -3.2143E-03 -6.3015E-02 5.4418E-02 -1.6077E-02 1.4629E-03 0.0000E+00
S4 -4.1655E-02 1.9937E-01 -3.6557E-01 3.3691E-01 -1.6734E-01 4.2935E-02 -4.4619E-03
S5 -4.4025E-02 2.5250E-01 -5.2336E-01 5.2889E-01 -2.8412E-01 7.8400E-02 -8.7849E-03
S6 3.6347E-02 -1.5927E-03 -1.6221E-01 2.6252E-01 -1.8792E-01 6.5158E-02 -8.9310E-03
S7 5.2557E-02 -2.0415E-02 1.9555E-03 -1.0728E-02 9.3350E-03 0.0000E+00 0.0000E+00
S8 -3.5407E-03 8.2619E-02 -2.0351E-01 1.7929E-01 -5.3260E-02 -5.8735E-04 0.0000E+00
S9 1.7706E-02 -8.2195E-02 9.8282E-02 -1.5298E-02 -1.7019E-02 0.0000E+00 0.0000E+00
S10 6.6249E-02 -1.6546E-01 3.7629E-01 -2.9242E-01 1.0934E-01 0.0000E+00 0.0000E+00
S11 -5.8518E-02 -1.2233E-01 1.3982E-01 -1.5878E-01 1.9911E-01 -1.3000E-01 0.0000E+00
S12 -2.1047E-02 -3.4558E-02 -5.4277E-03 1.1424E-01 -9.6238E-02 2.3054E-02 0.0000E+00
S13 -1.4769E-01 6.2366E-02 -3.6387E-02 2.2930E-02 -8.2943E-03 1.4732E-03 -9.9832E-05
S14 -2.0176E-01 1.1450E-01 -7.3630E-02 3.3268E-02 -9.9508E-03 1.7062E-03 -1.2657E-04
S15 -6.6932E-02 4.1113E-02 -2.0034E-02 6.4681E-03 -1.3741E-03 1.7795E-04 -1.0371E-05
S16 -7.0940E-02 3.1009E-02 -1.4053E-02 4.9606E-03 -1.1083E-03 1.3591E-04 -6.9125E-06
TABLE 5
Table 6 shows ImgH, which is half the diagonal length of the effective pixel region on the image forming surface S19, the axial distance TTL from the object side surface S1 of the first lens element E1 to the image forming surface S19, the maximum half field angle HFOV, the total effective focal length f of the optical imaging lens group, and the effective focal lengths f1 to f8 of the respective lens elements in example 2.
ImgH(mm) 2.55 f3(mm) 365.29
TTL(mm) 5.75 f4(mm) 608.36
HFOV(°) 23.0 f5(mm) -4.14
f(mm) 5.88 f6(mm) -35.82
f1(mm) 3.76 f7(mm) -6.28
f2(mm) 12.38 f8(mm) 11.16
TABLE 6
Fig. 4A shows an axial chromatic aberration curve of the optical imaging lens assembly of example 2, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. FIG. 4B shows the astigmatism curves of the optical imaging lens assembly of example 2, which represent meridional field curvature and sagittal field curvature. FIG. 4C is a distortion curve of the optical imaging lens assembly of example 2 showing the distortion magnitude corresponding to different image heights. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens assembly of embodiment 2, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens assembly of embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens set according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. FIG. 5 is a schematic structural diagram of an optical imaging lens assembly according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens assembly according to the present exemplary embodiment of the present application, in order from an object side to an image side, comprises: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
Table 7 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens element of the optical imaging lens group of example 3, wherein the radius of curvature and the thickness are both in millimeters (mm).
Figure BDA0001782895760000171
TABLE 7
As is clear from table 7, in example 3, both the object-side surface and the image-side surface of any one of the first lens element E1 through the eighth lens element E8 are aspheric. Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -8.1993E-03 7.2816E-03 -1.2812E-02 9.5899E-03 -4.9626E-03 1.1948E-03 -1.2320E-04
S2 6.9325E-02 -6.8106E-03 -5.0177E-02 4.2665E-02 -1.3424E-02 1.4882E-03 -1.0784E-05
S3 7.3036E-02 -5.3016E-03 -5.1348E-02 4.2783E-02 -1.1368E-02 7.7212E-04 0.0000E+00
S4 -3.9175E-02 1.7092E-01 -2.9773E-01 2.6306E-01 -1.2573E-01 3.1058E-02 -3.1160E-03
S5 -3.4887E-02 1.8496E-01 -3.6309E-01 3.4736E-01 -1.7648E-01 4.6004E-02 -4.8640E-03
S6 4.0532E-02 -3.6939E-02 -6.0900E-02 1.2336E-01 -8.7208E-02 2.8483E-02 -3.6353E-03
S7 5.3257E-02 -2.1701E-02 -1.2481E-02 9.0680E-03 1.3346E-03 0.0000E+00 0.0000E+00
S8 -1.1172E-02 1.2352E-01 -2.7300E-01 2.4261E-01 -8.7888E-02 8.5453E-03 0.0000E+00
S9 -2.6885E-03 1.1433E-02 -1.9684E-02 3.9519E-02 -2.0717E-02 0.0000E+00 0.0000E+00
S10 5.2555E-02 -1.1245E-01 3.2497E-01 -3.0896E-01 1.3898E-01 0.0000E+00 0.0000E+00
S11 -7.2548E-02 -9.5108E-02 6.0967E-02 -1.2165E-02 1.7641E-02 -4.0371E-02 0.0000E+00
S12 -2.9913E-02 -3.7161E-02 1.8896E-02 5.6634E-02 -5.1206E-02 1.2106E-02 0.0000E+00
S13 -1.7077E-01 7.5384E-02 -4.4189E-02 2.6247E-02 -9.4503E-03 1.8677E-03 -1.6018E-04
S14 -2.1921E-01 1.2574E-01 -8.1135E-02 3.6474E-02 -1.0913E-02 1.8762E-03 -1.3956E-04
S15 -6.6250E-02 4.5806E-02 -2.3984E-02 7.9522E-03 -1.6244E-03 1.9161E-04 -1.0046E-05
S16 -7.4083E-02 3.3370E-02 -1.4470E-02 4.7233E-03 -9.5027E-04 1.0396E-04 -4.7622E-06
TABLE 8
Table 9 shows ImgH, the axial distance TTL, the maximum half field angle HFOV, the total effective focal length f of the optical imaging lens group and the effective focal lengths f1 to f8 of the respective lenses, which are half the diagonal length of the effective pixel region on the image forming surface S19 in example 3, from the object side surface S1 of the first lens E1 to the image forming surface S19.
ImgH(mm) 2.55 f3(mm) 128.24
TTL(mm) 5.75 f4(mm) 82.85
HFOV(°) 23.0 f5(mm) -3.98
f(mm) 5.87 f6(mm) -37.66
f1(mm) 3.73 f7(mm) -6.55
f2(mm) 14.22 f8(mm) 11.98
TABLE 9
Fig. 6A shows the on-axis chromatic aberration curve of the optical imaging lens assembly of example 3, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. FIG. 6B shows the astigmatism curves of the optical imaging lens assembly of example 3, which represent meridional field curvature and sagittal field curvature. FIG. 6C is a distortion curve for the optical imaging lens assembly of example 3 showing the distortion magnitude for different image heights. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging lens assembly of embodiment 3, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens assembly of embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens set according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. FIG. 7 is a schematic structural diagram of an optical imaging lens assembly according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens assembly according to the present exemplary embodiment of the present application, in order from an object side to an image side, comprises: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
Table 10 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens element of the optical imaging lens group of example 4, wherein the radius of curvature and the thickness are both in millimeters (mm).
Figure BDA0001782895760000191
Figure BDA0001782895760000201
Watch 10
As is clear from table 10, in example 4, both the object-side surface and the image-side surface of any one of the first lens element E1 through the eighth lens element E8 are aspheric. Table 11 shows high-order term coefficients that can be used for each aspherical mirror surface in embodiment 4, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -6.4303E-03 2.1887E-03 -2.2227E-03 -1.4453E-03 1.1312E-03 -5.5297E-04 7.8500E-05
S2 6.8956E-02 7.1645E-03 -8.0250E-02 7.0351E-02 -2.6145E-02 4.3530E-03 -2.6123E-04
S3 7.3694E-02 5.6836E-04 -7.0662E-02 6.2377E-02 -1.9832E-02 2.1089E-03 0.0000E+00
S4 -4.0412E-02 1.8429E-01 -3.2228E-01 2.8512E-01 -1.3690E-01 3.4202E-02 -3.4798E-03
S5 -4.2576E-02 2.4633E-01 -5.0918E-01 5.0795E-01 -2.6773E-01 7.2305E-02 -7.9367E-03
S6 3.5779E-02 1.6127E-02 -2.2271E-01 3.5043E-01 -2.5095E-01 8.7210E-02 -1.1926E-02
S7 5.6666E-02 -3.3473E-02 2.0463E-02 -2.4328E-02 1.3263E-02 0.0000E+00 0.0000E+00
S8 -4.1340E-04 6.5074E-02 -1.3995E-01 9.5534E-02 -4.5898E-03 -1.0753E-02 0.0000E+00
S9 8.7218E-03 -4.6869E-02 5.4638E-02 8.0638E-03 -2.2896E-02 0.0000E+00 0.0000E+00
S10 5.6675E-02 -1.1999E-01 2.9568E-01 -2.2740E-01 8.2326E-02 0.0000E+00 0.0000E+00
S11 -6.2491E-02 -1.3008E-01 1.8456E-01 -2.2039E-01 2.1370E-01 -1.0775E-01 0.0000E+00
S12 -3.0107E-02 -4.5836E-02 3.1363E-02 4.9253E-02 -4.6196E-02 9.9104E-03 0.0000E+00
S13 -1.5905E-01 6.2675E-02 -3.7187E-02 2.4640E-02 -9.2290E-03 1.7383E-03 -1.3047E-04
S14 -2.0908E-01 1.1491E-01 -7.3035E-02 3.2742E-02 -9.7743E-03 1.6722E-03 -1.2449E-04
S15 -6.3336E-02 3.9656E-02 -1.9597E-02 6.3589E-03 -1.3331E-03 1.6643E-04 -9.2397E-06
S16 -6.8485E-02 2.9391E-02 -1.3191E-02 4.6382E-03 -1.0263E-03 1.2378E-04 -6.1811E-06
TABLE 11
Table 12 shows ImgH, which is half the diagonal length of the effective pixel region on the image forming surface S19, the axial distance TTL from the object side surface S1 of the first lens element E1 to the image forming surface S19, the maximum half field angle HFOV, the total effective focal length f of the optical imaging lens group, and the effective focal lengths f1 to f8 of the respective lens elements in example 4.
ImgH(mm) 2.55 f3(mm) 528.18
TTL(mm) 5.75 f4(mm) 376.15
HFOV(°) 23.0 f5(mm) -4.12
f(mm) 5.89 f6(mm) -33.56
f1(mm) 3.72 f7(mm) -6.36
f2(mm) 12.59 f8(mm) 11.00
TABLE 12
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens assembly of example 4, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. FIG. 8B shows the astigmatism curves for the optical imaging lens assembly of example 4 representing meridional and sagittal field curvatures. FIG. 8C is a distortion curve for the optical imaging lens assembly of example 4 showing the distortion magnitude for different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens assembly of embodiment 4, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens assembly of embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens set according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. FIG. 9 is a schematic diagram showing the structure of an optical imaging lens assembly according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens assembly according to the present exemplary embodiment of the present application, in order from an object side to an image side, comprises: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
Table 13 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens element of the optical imaging lens group of example 5, wherein the radius of curvature and the thickness are both in millimeters (mm).
Figure BDA0001782895760000221
Watch 13
As is clear from table 13, in example 5, both the object-side surface and the image-side surface of any one of the first lens element E1 through the eighth lens element E8 are aspheric. Table 14 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -8.0236E-03 6.1708E-03 -9.9100E-03 6.4680E-03 -3.1385E-03 6.6575E-04 -6.2373E-05
S2 6.9061E-02 -7.0393E-03 -4.9102E-02 4.0409E-02 -1.1546E-02 8.0376E-04 8.2982E-05
S3 7.4532E-02 -9.2175E-03 -4.8710E-02 4.2134E-02 -1.1511E-02 8.6286E-04 0.0000E+00
S4 -3.5569E-02 1.4698E-01 -2.3616E-01 1.9909E-01 -9.2489E-02 2.2448E-02 -2.2278E-03
S5 -3.6460E-02 1.8270E-01 -3.3043E-01 3.0141E-01 -1.4852E-01 3.7804E-02 -3.9017E-03
S6 3.8231E-02 -2.4509E-02 -8.2184E-02 1.4502E-01 -1.0040E-01 3.2682E-02 -4.1524E-03
S7 4.5192E-02 -1.9567E-02 -1.0307E-03 9.5413E-04 2.2694E-03 0.0000E+00 0.0000E+00
S8 1.1913E-02 2.1329E-02 -1.1378E-01 1.4643E-01 -8.0009E-02 1.6351E-02 0.0000E+00
S9 3.5445E-02 -1.7799E-01 2.7411E-01 -1.6932E-01 3.6957E-02 0.0000E+00 0.0000E+00
S10 6.0055E-02 -2.0772E-01 4.6661E-01 -4.0717E-01 1.6042E-01 0.0000E+00 0.0000E+00
S11 -6.0527E-02 -1.0665E-01 5.4684E-02 -3.3346E-02 9.0005E-02 -9.1171E-02 0.0000E+00
S12 -2.3077E-02 -3.3791E-02 -1.7963E-02 1.1244E-01 -8.3824E-02 1.8942E-02 0.0000E+00
S13 -1.8415E-01 7.6563E-02 -3.9060E-02 1.6035E-02 -1.3622E-03 -7.9951E-04 1.5015E-04
S14 -2.3611E-01 1.4114E-01 -9.6042E-02 4.5407E-02 -1.4508E-02 2.7561E-03 -2.3332E-04
S15 -7.2531E-02 5.4724E-02 -2.8415E-02 8.6279E-03 -1.4829E-03 1.3741E-04 -5.5838E-06
S16 -8.2697E-02 4.0895E-02 -1.8836E-02 6.6413E-03 -1.4628E-03 1.7469E-04 -8.6243E-06
TABLE 14
Table 15 shows ImgH, the axial distance TTL, the maximum half field angle HFOV, the total effective focal length f of the optical imaging lens group and the effective focal lengths f1 to f8 of the respective lenses, which is half the diagonal length of the effective pixel region at the image forming surface S19 in example 5, from the object side surface S1 of the first lens E1 to the image forming surface S19.
ImgH(mm) 2.55 f3(mm) -432.41
TTL(mm) 5.75 f4(mm) -818.91
HFOV(°) 23.0 f5(mm) -4.09
f(mm) 5.87 f6(mm) -73.20
f1(mm) 3.73 f7(mm) -6.58
f2(mm) 12.49 f8(mm) 13.76
Watch 15
Fig. 10A shows the on-axis chromatic aberration curve of the optical imaging lens assembly of example 5, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. FIG. 10B shows the astigmatism curves of the optical imaging lens assembly of example 5, which represent meridional field curvature and sagittal field curvature. FIG. 10C is a distortion curve for the optical imaging lens assembly of example 5 showing the distortion magnitude for different image heights. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging lens assembly of embodiment 5, which represents the deviation of different image heights of light rays on the imaging surface after passing through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens assembly of embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens set according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. FIG. 11 is a schematic structural diagram of an optical imaging lens assembly according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens assembly according to the present exemplary embodiment of the present application, in order from an object side to an image side, comprises: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
Table 16 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens element of the set of optical imaging lenses of example 6, wherein the radius of curvature and the thickness are both in millimeters (mm).
Figure BDA0001782895760000241
Figure BDA0001782895760000251
TABLE 16
As is clear from table 16, in example 6, both the object-side surface and the image-side surface of any one of the first lens element E1 through the eighth lens element E8 are aspheric. Table 17 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -8.7847E-03 9.1849E-03 -1.3655E-02 9.4015E-03 -4.4441E-03 1.0134E-03 -1.0271E-04
S2 6.8678E-02 -7.4027E-03 -4.6860E-02 3.7534E-02 -9.9806E-03 4.3883E-04 1.0972E-04
S3 7.4150E-02 -1.2701E-02 -4.3279E-02 3.9127E-02 -1.1090E-02 9.3336E-04 0.0000E+00
S4 -3.1439E-02 1.2807E-01 -1.9526E-01 1.5723E-01 -7.0322E-02 1.6561E-02 -1.6069E-03
S5 -3.4064E-02 1.6472E-01 -2.9290E-01 2.5781E-01 -1.2114E-01 2.9181E-02 -2.8402E-03
S6 3.8052E-02 -2.0002E-02 -8.6107E-02 1.4350E-01 -9.5145E-02 2.9541E-02 -3.5620E-03
S7 3.3109E-02 1.7338E-03 -2.6209E-02 1.6104E-02 -1.6215E-03 0.0000E+00 0.0000E+00
S8 1.8941E-02 -7.8765E-03 -6.6258E-02 1.1780E-01 -7.8850E-02 1.9226E-02 0.0000E+00
S9 4.0434E-02 -2.1801E-01 3.5948E-01 -2.4198E-01 5.8824E-02 0.0000E+00 0.0000E+00
S10 3.8538E-02 -2.0573E-01 4.8489E-01 -4.2578E-01 1.5475E-01 0.0000E+00 0.0000E+00
S11 -6.5546E-02 -7.6426E-02 -3.9299E-03 6.9749E-02 9.4687E-03 -6.8538E-02 0.0000E+00
S12 -2.5739E-02 -1.4385E-02 -5.5421E-02 1.7304E-01 -1.2954E-01 3.1086E-02 0.0000E+00
S13 -1.8969E-01 5.8221E-02 -1.4404E-02 -5.1847E-03 1.1250E-02 -4.7576E-03 6.2635E-04
S14 -2.4341E-01 1.4177E-01 -9.7433E-02 4.7042E-02 -1.5668E-02 3.1905E-03 -2.9484E-04
S15 -8.9531E-02 7.9605E-02 -4.6067E-02 1.5884E-02 -3.1875E-03 3.4864E-04 -1.6267E-05
S16 -1.0573E-01 6.0862E-02 -3.1392E-02 1.2016E-02 -2.8063E-03 3.4804E-04 -1.7531E-05
TABLE 17
Table 18 shows ImgH, which is half the diagonal length of the effective pixel region on the image forming surface S19, the axial distance TTL from the object side surface S1 of the first lens element E1 to the image forming surface S19, the maximum half field angle HFOV, the total effective focal length f of the optical imaging lens group, and the effective focal lengths f1 to f8 of the respective lens elements in example 6.
ImgH(mm) 2.55 f3(mm) 77.10
TTL(mm) 5.75 f4(mm) -621.61
HFOV(°) 23.0 f5(mm) -3.89
f(mm) 5.85 f6(mm) 932.34
f1(mm) 3.77 f7(mm) -6.83
f2(mm) 13.58 f8(mm) 20.53
Watch 18
Fig. 12A shows the on-axis chromatic aberration curve of the optical imaging lens assembly of example 6, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. FIG. 12B is an astigmatism curve representing meridional field curvature and sagittal field curvature for the optical imaging lens assembly of example 6. FIG. 12C is a distortion curve for the optical imaging lens assembly of example 6 showing the distortion magnitude for different image heights. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens assembly of example 6, which represents the deviation of different image heights on the image plane after the light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens assembly of embodiment 6 can achieve good imaging quality.
Example 7
An optical imaging lens set according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. FIG. 13 is a schematic diagram showing the structure of an optical imaging lens assembly according to embodiment 7 of the present application.
As shown in fig. 13, the optical imaging lens assembly according to the present exemplary embodiment of the present application, in order from an object side to an image side, comprises: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
Table 19 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens element of the optical imaging lens group of example 7, wherein the radius of curvature and the thickness are both in millimeters (mm).
Figure BDA0001782895760000271
Watch 19
As is clear from table 19, in example 7, both the object-side surface and the image-side surface of any one of the first lens element E1 through the eighth lens element E8 are aspheric. Table 20 shows high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0001782895760000272
Figure BDA0001782895760000281
Watch 20
Table 21 shows ImgH, which is half the diagonal length of the effective pixel region on the image forming surface S19, the distance TTL on the optical axis from the object side surface S1 of the first lens element E1 to the image forming surface S19, the maximum half field angle HFOV, the total effective focal length f of the optical imaging lens group, and the effective focal lengths f1 to f8 of the respective lens elements in example 7.
ImgH(mm) 2.55 f3(mm) 37.79
TTL(mm) 5.75 f4(mm) -205.93
HFOV(°) 23.0 f5(mm) -4.49
f(mm) 5.83 f6(mm) 287.11
f1(mm) 3.81 f7(mm) -6.81
f2(mm) 17.05 f8(mm) 438.88
TABLE 21
Fig. 14A shows the on-axis chromatic aberration curve of the optical imaging lens assembly of example 7, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. FIG. 14B shows the astigmatism curves of the optical imaging lens assembly of example 7 representing meridional field curvature and sagittal field curvature. FIG. 14C is a distortion curve for the optical imaging lens assembly of example 7 showing the distortion magnitude for different image heights. Fig. 14D shows a chromatic aberration of magnification curve of the optical imaging lens assembly of embodiment 7, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens assembly of embodiment 7 can achieve good imaging quality.
Example 8
An optical imaging lens set according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. FIG. 15 is a schematic structural diagram of an optical imaging lens assembly according to embodiment 8 of the present application.
As shown in fig. 15, the optical imaging lens assembly according to the present exemplary embodiment of the present application, in order from an object side to an image side, comprises: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
Table 22 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens element of the optical imaging lens assembly of example 8, wherein the radius of curvature and the thickness are both in millimeters (mm).
Figure BDA0001782895760000291
Figure BDA0001782895760000301
TABLE 22
As can be seen from table 22, in example 8, both the object-side surface and the image-side surface of any one of the first lens element E1 through the eighth lens element E8 are aspheric. Table 23 shows high-order term coefficients that can be used for each aspherical mirror surface in embodiment 8, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -7.0014E-03 2.5343E-03 -3.1791E-03 -7.0778E-04 8.7490E-04 -4.8526E-04 6.2102E-05
S2 7.2813E-02 -7.7099E-03 -5.7886E-02 5.3121E-02 -1.8872E-02 2.8007E-03 -1.4193E-04
S3 7.6704E-02 -1.0457E-02 -5.0159E-02 4.3945E-02 -1.1916E-02 8.0025E-04 0.0000E+00
S4 -5.1910E-02 2.3630E-01 -4.2032E-01 3.8135E-01 -1.8807E-01 4.8073E-02 -4.9922E-03
S5 -4.5162E-02 2.7156E-01 -5.8346E-01 6.0907E-01 -3.3726E-01 9.5750E-02 -1.1047E-02
S6 4.8389E-02 -3.4067E-02 -1.4377E-01 2.8440E-01 -2.2215E-01 8.1721E-02 -1.1765E-02
S7 5.0314E-02 -3.5138E-03 -2.4923E-02 -8.3731E-04 1.0527E-02 0.0000E+00 0.0000E+00
S8 -9.3422E-03 1.4821E-01 -3.9072E-01 4.0231E-01 -1.6977E-01 2.0843E-02 0.0000E+00
S9 1.7223E-02 -8.6977E-02 9.9560E-02 1.0328E-02 -3.7978E-02 0.0000E+00 0.0000E+00
S10 5.6054E-02 -1.8954E-01 4.8962E-01 -3.9007E-01 1.2983E-01 0.0000E+00 0.0000E+00
S11 -7.3781E-02 -1.8906E-01 3.0817E-01 -3.5315E-01 3.8572E-01 -2.3718E-01 0.0000E+00
S12 -1.0518E-02 -8.1453E-02 6.2650E-02 1.2013E-01 -1.4272E-01 4.0910E-02 0.0000E+00
S13 -1.2428E-01 -1.3846E-02 3.1731E-02 -8.9971E-03 1.1035E-03 -2.5375E-04 5.0650E-05
S14 -1.9250E-01 7.3546E-02 -3.9604E-02 1.6711E-02 -5.0767E-03 9.3667E-04 -8.1948E-05
S15 -8.7790E-02 7.8130E-02 -4.9793E-02 1.8376E-02 -3.8479E-03 4.3529E-04 -2.1077E-05
S16 -1.1563E-01 6.3478E-02 -2.9561E-02 9.2864E-03 -1.7935E-03 2.0149E-04 -1.0284E-05
TABLE 23
Table 24 shows ImgH, the axial distance TTL, the maximum half field angle HFOV, the total effective focal length f of the optical imaging lens group and the effective focal lengths f1 to f8 of the respective lenses, which is half the diagonal length of the effective pixel region at the image forming surface S19 in example 8, from the object side surface S1 of the first lens E1 to the image forming surface S19.
Figure BDA0001782895760000302
Figure BDA0001782895760000311
Watch 24
Fig. 16A shows the on-axis chromatic aberration curve of the optical imaging lens assembly of example 8, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. FIG. 16B is an astigmatism curve representing meridional field curvature and sagittal field curvature for the optical imaging lens assembly of example 8. FIG. 16C is a distortion curve for the optical imaging lens assembly of example 8 showing the distortion magnitude for different image heights. Fig. 16D shows a chromatic aberration of magnification curve of the optical imaging lens assembly of embodiment 8, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. As can be seen from fig. 16A to 16D, the optical imaging lens assembly of embodiment 8 can achieve good imaging quality.
In summary, examples 1 to 8 satisfy the relationships shown in table 25, respectively.
Conditional expression (A) example 1 2 3 4 5 6 7 8
HFOV(°) 23.0 23.0 23.0 23.0 23.0 23.0 23.0 22.0
(T12+T23+T34+T45)/CT1*5 1.28 1.27 1.16 1.29 1.14 1.09 0.74 1.33
f2/f1 3.29 3.30 3.81 3.38 3.35 3.60 4.47 2.98
R2/f5 -3.01 -3.14 -3.58 -3.46 -3.54 -3.73 -3.21 -3.09
f78/f12345 -2.99 -3.04 -3.08 -3.17 -2.61 -2.04 -1.38 -2.68
R13/R14 2.99 2.77 2.45 2.58 2.33 2.17 2.12 2.80
f/R10 2.07 2.14 2.03 2.16 2.14 2.25 1.94 2.46
T67/T12/10 2.00 2.00 1.94 1.90 2.05 2.04 1.98 2.35
DT82/DT52 2.66 2.67 2.60 2.67 2.54 2.46 2.18 2.73
TABLE 25
The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens set described above.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (15)

1. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, 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 having optical power,
the first lens has positive focal power, and the object side surface of the first lens is a convex surface;
the fifth lens has negative focal power, and the image side surface of the fifth lens is a concave surface;
the object side surface of the sixth lens is a concave surface;
the object side surface of the seventh lens is a convex surface;
the eighth lens has positive optical power;
any two adjacent lenses of the first lens to the eighth lens are provided with air intervals;
an air interval T67 of the sixth lens and the seventh lens on the optical axis and an air interval T12 of the first lens and the second lens on the optical axis satisfy 1.5 < T67/T12/10 < 2.5; and
0.5＜(T12+T23+T34+T45)/CT1*5＜1.5，
wherein CT1 is the central thickness of the first lens on the optical axis,
t23 is an air space on the optical axis of the second lens and the third lens,
t34 is an air space on the optical axis between the third lens and the fourth lens, an
T45 is an air space on the optical axis between the fourth lens and the fifth lens.
2. The set of optical imaging lenses of claim 1, wherein the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy 2.5 < f2/f1 < 5.
3. The set of optical imaging lenses of claim 1, wherein the radius of curvature R2 of the image-side surface of the first lens element and the effective focal length f5 of the fifth lens element satisfy-4 < R2/f5 < -3.
4. The set of optical imaging lenses of claim 1, wherein a radius of curvature R13 of the object-side surface of the seventh lens element and a radius of curvature R14 of the image-side surface of the seventh lens element satisfy 2 < R13/R14 < 3.
5. The set of optical imaging lenses of claim 1, wherein the total effective focal length f of the set of optical imaging lenses and the radius of curvature of the image-side surface of the fifth lens element, R10, satisfy 1.8 < f/R10 < 2.5.
6. The set of optical imaging lenses of claim 1, wherein the maximum effective half aperture ratio DT52 of the image-side surface of the fifth lens element and DT82 of the image-side surface of the eighth lens element satisfy 2 < DT82/DT52 < 3.
7. The set of optical imaging lenses according to one of claims 1 to 6, characterized in that the maximum half field angle HFOV of the set of optical imaging lenses satisfies HFOV ≦ 30 °.
8. The set of optical imaging lenses of any one of claims 1 to 6, wherein a combined focal length f78 of the seventh lens element and the eighth lens element and a combined focal length f12345 of the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element satisfy-3.5 < f78/f12345 < -1.
9. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, 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 having optical power,
the first lens has positive focal power, and the object side surface of the first lens is a convex surface;
the fifth lens has negative focal power, and the image side surface of the fifth lens is a concave surface;
the object side surface of the sixth lens is a concave surface;
the object side surface of the seventh lens is a convex surface;
the eighth lens has positive optical power;
at least one mirror surface from the object side surface of the first lens to the image side surface of the eighth lens is an aspheric mirror surface;
the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy 2.5 < f2/f1 < 5;
an air interval T67 of the sixth lens and the seventh lens on the optical axis and an air interval T12 of the first lens and the second lens on the optical axis satisfy 1.5 < T67/T12/10 < 2.5; and
0.5＜(T12+T23+T34+T45)/CT1*5＜1.5，
wherein CT1 is the central thickness of the first lens on the optical axis,
t23 is an air space on the optical axis of the second lens and the third lens,
t34 is an air space on the optical axis between the third lens and the fourth lens, an
T45 is an air space on the optical axis between the fourth lens and the fifth lens.
10. The set of optical imaging lenses of claim 9, wherein the radius of curvature R2 of the image-side surface of the first lens element and the effective focal length f5 of the fifth lens element satisfy-4 < R2/f5 < -3.
11. The set of optical imaging lenses of claim 9, wherein the total effective focal length f of the set of optical imaging lenses and the radius of curvature R10 of the image-side surface of the fifth lens element satisfy 1.8 < f/R10 < 2.5.
12. The set of optical imaging lenses of claim 9, wherein a radius of curvature R13 of the object-side surface of the seventh lens element and a radius of curvature R14 of the image-side surface of the seventh lens element satisfy 2 < R13/R14 < 3.
13. The set of optical imaging lenses of claim 9, wherein the maximum effective half aperture ratio DT52 of the image-side surface of the fifth lens element and DT82 of the image-side surface of the eighth lens element satisfy 2 < DT82/DT52 < 3.
14. The set of optical imaging lenses of claim 9, wherein a combined focal length f78 of the seventh lens and the eighth lens and a combined focal length f12345 of the first lens, the second lens, the third lens, the fourth lens and the fifth lens satisfy-3.5 < f78/f12345 < -1.
15. The set of optical imaging optics according to one of claims 9 to 14, characterized in that the maximum half field angle HFOV of the set of optical imaging optics satisfies HFOV ≦ 30 °.
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