CN107643586B - Image pickup lens group - Google Patents

Image pickup lens group Download PDF

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CN107643586B
CN107643586B CN201711105103.4A CN201711105103A CN107643586B CN 107643586 B CN107643586 B CN 107643586B CN 201711105103 A CN201711105103 A CN 201711105103A CN 107643586 B CN107643586 B CN 107643586B
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lens
lens group
image
imaging
image pickup
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CN107643586A (en
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宋博
闻人建科
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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/CN2018/100479 priority patent/WO2019091170A1/en
Priority to US16/843,626 priority patent/US11460671B2/en
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Abstract

The application discloses a group of lens of making a video recording, this lens group includes in proper order along the optical axis from object side to image side: a first lens having positive optical power, the image side surface of which is concave; a second lens having optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens with positive focal power, the object side surface of which is a concave surface; a seventh lens having optical power; and the object side surface of the eighth lens with negative focal power is a concave surface. The total effective focal length f of the image pickup lens group and the entrance pupil diameter EPD of the image pickup lens group meet f/EPD less than or equal to 2.0.

Description

Image pickup lens group
Technical Field
The present application relates to a photographing lens assembly, and more particularly, to a photographing lens assembly having a large field of view and a large aperture, including eight lenses.
Background
With the improvement of the performance and the reduction of the size of common photosensitive elements such as a photosensitive coupling element (CCD) or a Complementary Metal Oxide Semiconductor (CMOS), the number of pixels and the size of pixels of the photosensitive element are increased and reduced, so that higher requirements are placed on the high imaging quality and miniaturization of the matched imaging lens group.
The reduction in the pixel size means that the light throughput of the imaging system will be smaller for the same exposure time. However, the image sensor and the environmental background have certain system noise, and there is a certain requirement for the light flux of the imaging system. The imaging system can obtain better imaging quality only when the effective light entering amount is large enough. Generally, an eight-chip optical imaging system can effectively correct aberration for large light incoming amount, but the total optical length of the imaging system is not satisfactory due to the large number of lenses, and the requirement of thinning portable electronic products such as smart phones cannot be met.
Therefore, the application provides an eight-piece optical imaging system which is applicable to portable electronic products, has ultrathin large aperture and good imaging quality.
Disclosure of Invention
The present application provides an imaging lens group, e.g., a large aperture lens, applicable to portable electronic products that at least addresses or partially addresses at least one of the above-mentioned shortcomings in the art.
In one aspect, the present application provides an image pickup lens group including, in order from an object side to an image side along an optical axis: a first lens having positive optical power, the image-side surface of which may be concave; a second lens having optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens with positive focal power, the object side of which can be a concave surface; a seventh lens having optical power; the object side surface of the eighth lens with negative focal power can be concave. The total effective focal length f of the image pickup lens group and the entrance pupil diameter EPD of the image pickup lens group can meet the requirement that f/EPD is less than or equal to 2.0.
In one embodiment, the total optical length TTL of the image capturing lens assembly and half of the diagonal length ImgH of the effective pixel area on the imaging surface of the image capturing lens assembly can satisfy TTL/ImgH less than or equal to 1.6.
In one embodiment, the full field angle FOV of the imaging lens group may satisfy 75 ° < FOV < 85 °.
In one embodiment, the image capturing lens assembly may further include a stop, which may be disposed between the second lens and the third lens.
In one embodiment, the effective focal length f2 of the second lens and the total effective focal length f of the image capturing lens assembly may satisfy-10 < f2/f < 25.
In one embodiment, the effective focal length f4 of the fourth lens and the total effective focal length f of the image capturing lens assembly may satisfy-45 < f4/f < 25.
In one embodiment, the effective focal length f7 of the seventh lens and the total effective focal length f of the image capturing lens assembly may satisfy-30 < f7/f < 50.
In one embodiment, the radius of curvature R11 of the object-side surface of the sixth lens and the radius of curvature R12 of the image-side surface of the sixth lens may satisfy 4 < R11/R12 < 10.
In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis can satisfy 2 < CT1/CT2 < 6.
In one embodiment, the total optical length TTL of the imaging lens group, half of the diagonal length of the effective pixel area on the imaging surface of the imaging lens group, the total effective focal length f of the imaging lens group, and the entrance pupil diameter EPD of the imaging lens group may satisfy 0.5 < (TTL/ImgH)/(f/EPD) +.1.5.
In one embodiment, the effective focal length f7 of the seventh lens and the effective focal length f8 of the eighth lens may satisfy-65 < f7/f8 < 45.
In one embodiment, the effective focal length f7 of the seventh lens and the radius of curvature R6 of the image-side surface of the third lens may satisfy-25 < f7/R6 < 20.
In another aspect, the present application provides an image pickup lens group including, in order from an object side to an image side along an optical axis: a first lens having positive optical power, the image-side surface of which may be concave; a second lens having optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens with positive focal power, the object side of which can be a concave surface; a seventh lens having optical power; the object side surface of the eighth lens with negative focal power can be concave. The center thickness CT1 of the first lens on the optical axis and the center thickness CT2 of the second lens on the optical axis can satisfy the condition that CT1/CT2 is more than 2 and less than 6.
In still another aspect, the present application further provides an imaging lens group including, in order from an object side to an image side along an optical axis: a first lens having positive optical power, the image-side surface of which may be concave; a second lens having optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens with positive focal power, the object side of which can be a concave surface; a seventh lens having optical power; the object side surface of the eighth lens with negative focal power can be concave. The curvature radius R11 of the object side surface of the sixth lens element and the curvature radius R12 of the image side surface of the sixth lens element may satisfy 4 < R11/R12 < 10.
In still another aspect, the present application further provides an imaging lens group including, in order from an object side to an image side along an optical axis: a first lens having positive optical power, the image-side surface of which may be concave; a second lens having optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens with positive focal power, the object side of which can be a concave surface; a seventh lens having optical power; the object side surface of the eighth lens with negative focal power can be concave. The image capturing lens assembly may further include a diaphragm, and the diaphragm may be disposed between the second lens and the third lens.
The imaging lens group has at least one beneficial effect of ultra-thin miniaturization, large aperture, good processability, high imaging quality and the like 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 a plurality of (e.g., eight) lenses.
Drawings
Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic configuration diagram of an image pickup lens group according to embodiment 1 of the present application;
fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 1;
fig. 3 shows a schematic configuration diagram of an image pickup lens group according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 2;
fig. 5 shows a schematic configuration diagram of an image pickup lens group according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 3;
Fig. 7 shows a schematic configuration diagram of an image pickup lens group according to embodiment 4 of the present application;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 4;
fig. 9 shows a schematic configuration diagram of an image pickup lens group according to embodiment 5 of the present application;
fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 5;
fig. 11 shows a schematic configuration diagram of an image pickup lens group according to embodiment 6 of the present application;
fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 6;
fig. 13 shows a schematic configuration diagram of an image pickup lens group according to embodiment 7 of the present application;
fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 7;
fig. 15 shows a schematic configuration diagram of an image pickup lens group according to embodiment 8 of the present application;
fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 8;
Fig. 17 shows a schematic configuration diagram of an image pickup lens group according to embodiment 9 of the present application;
fig. 18A to 18D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 9;
fig. 19 shows a schematic structural view of an image pickup lens group according to embodiment 10 of the present application;
fig. 20A to 20D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 10;
fig. 21 shows a schematic configuration diagram of an image pickup lens group according to embodiment 11 of the present application;
fig. 22A to 22D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 11;
fig. 23 shows a schematic configuration diagram of an image pickup lens group according to embodiment 12 of the present application;
fig. 24A to 24D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 12.
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 surface, and the surface of each lens closest to the imaging surface is referred to as the image side surface.
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 present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The features, principles, and other aspects of the present application are described in detail below.
The image pickup lens group according to the present exemplary embodiment includes, for example, eight lenses having optical power, that is, 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 order from the object side to the image side along the optical axis.
In an exemplary embodiment, the first lens may have positive optical power, and an image side surface thereof may be concave; the second lens has positive optical power or negative optical power; the third lens has positive optical power or negative optical power; the fourth lens has positive focal power or negative focal power; the fifth lens has positive optical power or negative optical power; the sixth lens may have positive optical power, and an object side surface thereof may be a concave surface; the seventh lens has positive optical power or negative optical power; the eighth lens element may have negative refractive power and a concave object-side surface.
In an exemplary embodiment, the object side surface of the first lens may be convex.
In an exemplary embodiment, the object-side surface of the second lens may be convex and the image-side surface may be concave.
In an exemplary embodiment, at least one of the object side surface and the image side surface of the third lens may be convex, for example, the image side surface of the third lens may be convex.
In an exemplary embodiment, the image side surface of the sixth lens may be convex.
In an exemplary embodiment, the object-side surface of the seventh lens may be concave, and the image-side surface may be convex.
In an exemplary embodiment, the photographing lens assembly of the present application may satisfy the conditional expression f/EPD +.2.0, where f is the total effective focal length of the photographing lens assembly and EPD is the entrance pupil diameter of the photographing lens assembly. More specifically, f and EPD may further satisfy 1.35.ltoreq.f/EPD.ltoreq.1.98. The light entering quantity of the image pickup lens group is reasonably controlled, and the low-order aberration of the imaging system can be effectively balanced.
In an exemplary embodiment, the imaging lens group of the present application may satisfy the condition that TTL/ImgH is less than or equal to 1.6, where TTL is an optical total length of the imaging lens group (i.e., a distance between a center of an object side surface of the first lens and an imaging surface of the imaging lens group on an optical axis), and ImgH is a half of a diagonal length of an effective pixel area on the imaging surface. More specifically, TTL and ImgH can further satisfy 1.24.ltoreq.TTL/ImgH.ltoreq.1.58. By reasonably controlling the ratio of TTL and ImgH, the miniaturization characteristic of the imaging system is ensured.
In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional 75 ° < FOV < 85 °, where FOV is the full field angle of the imaging lens group. More specifically, the FOV may further satisfy 77.5.ltoreq.FOV.ltoreq.82.6. By controlling the full field angle FOV, the imaging range of the imaging system can be effectively controlled.
In an exemplary embodiment, the image capturing lens assembly of the present application may satisfy the conditional expression-10 < f2/f < 25, where f2 is an effective focal length of the second lens and f is a total effective focal length of the image capturing lens assembly. More specifically, f2 and f may further satisfy-10 < f2/f < 23, for example, -9.64.ltoreq.f2/f.ltoreq.22.31. By reasonably controlling the focal power range of the second lens, the imaging system generates reasonable spherical aberration so as to balance the low-order aberration of the imaging system.
In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional expression-45 < f4/f < 25, where f4 is an effective focal length of the fourth lens element, and f is a total effective focal length of the imaging lens group. More specifically, f4 and f may further satisfy-44 < f4/f < 23, e.g., -43.38.ltoreq.f4/f.ltoreq.22.03. By reasonably controlling the focal power range of the fourth lens, the coma of the imaging system can be effectively controlled.
In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional expression-30 < f7/f < 50, where f7 is an effective focal length of the seventh lens, and f is a total effective focal length of the imaging lens group. More specifically, f7 and f may further satisfy-24 < f7/f < 42, for example, -23.66.ltoreq.f7/f.ltoreq. 41.98. By reasonably controlling the focal power range of the seventh lens, the curvature of field of the imaging system can be effectively controlled.
In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional expression 4 < R11/R12 < 10, where R11 is a radius of curvature of an object side surface of the sixth lens element, and R12 is a radius of curvature of an image side surface of the sixth lens element. More specifically, R11 and R12 may further satisfy 4.85.ltoreq.R11/R12.ltoreq.9.94. The bending direction and the bending degree of the sixth lens are reasonably controlled, so that the field curvature of the imaging system can be effectively controlled, and the imaging quality of the imaging system is improved.
In an exemplary embodiment, the imaging lens group of the present application may satisfy the condition of 2 < CT1/CT2 < 6, where CT1 is a central thickness of the first lens element on the optical axis, and CT2 is a central thickness of the second lens element on the optical axis. More specifically, CT1 and CT2 may further satisfy 2.47.ltoreq.CT1/CT 2.ltoreq.5.12. The ratio of the center thicknesses of the first lens and the second lens is reasonably controlled, so that the imaging system can obtain good processability.
In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional expression of 0.5 < (TTL/ImgH)/(f/EPD) +.1.5, where TTL is the optical total length of the imaging lens group, imgH is half of the diagonal length of the effective pixel area on the imaging surface, f is the total effective focal length of the imaging lens group, and EPD is the entrance pupil diameter of the imaging lens group. More specifically, TTL, imgH, f and EPD can further satisfy 0.72.ltoreq.TTL/ImgH)/(f/EPD.ltoreq.1.15. By controlling the ratio of TTL, imgH, f and EPD, the imaging system is ensured to have the characteristics of ultra-thin and large aperture.
In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional expression-65 < f7/f8 < 45, where f7 is an effective focal length of the seventh lens and f8 is an effective focal length of the eighth lens. More specifically, f7 and f8 may further satisfy-63 < f7/f8 < 43, e.g., -60.82.ltoreq.f7/f 8.ltoreq.42.78. The effective focal length ratio of the seventh lens and the eighth lens is reasonably controlled, so that the astigmatic quantity of the system can be effectively controlled within a reasonable range.
In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional expression-25 < f7/R6 < 20, where f7 is an effective focal length of the seventh lens element, and R6 is a radius of curvature of an image side surface of the third lens element. More specifically, f7 and R6 may further satisfy-24 < f7/R6 < 17, for example, -23.90.ltoreq.f7/R6.ltoreq.16.39.
In an exemplary embodiment, the image capturing lens assembly may further include a diaphragm disposed between the second lens and the third lens to improve an imaging quality of the lens assembly.
Optionally, the image pickup lens group 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 image pickup lens group according to the above-described embodiment of the present application may employ a plurality of lenses, for example, eight lenses described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like, the volume of the lens group can be effectively reduced, the sensitivity of the lens group can be reduced, and the processability of the lens group can be improved, so that the camera lens group is more beneficial to production and processing and can be suitable for portable electronic products. Meanwhile, the imaging lens group configured as described above has advantageous effects such as ultra-thin, large aperture, high imaging quality, and the like.
In the embodiments of the present application, the mirror surface of each lens is an aspherical mirror surface. 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.
However, it will be appreciated by those skilled in the art that the number of lenses making up the imaging lens group can be varied to achieve the various results and advantages described in this specification without departing from the technical solutions claimed herein. For example, although eight lenses are described as an example in the embodiment, the image pickup lens group is not limited to include eight lenses. The camera lens group may also include other numbers of lenses, if desired.
Specific examples of the image pickup lens group applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An image pickup lens group according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic configuration diagram of an image pickup lens group according to embodiment 1 of the present application.
As shown in fig. 1, an image pickup lens group according to an exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave; the second lens element E2 has negative 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 concave, and an image-side surface S6 thereof is convex; the fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave; the fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex; the sixth lens element E6 with positive refractive power has a concave object-side surface S11 and a convex image-side surface S12; the seventh lens element E7 with negative refractive power has a concave object-side surface S13 and a convex image-side surface S14; the eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Optionally, the image pickup lens group in the present embodiment further includes a stop STO disposed between the second lens E2 and the third lens E3.
Table 1 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the imaging lens group of example 1, wherein the units of the radii of curvature and the thicknesses are millimeters (mm).
Figure BDA0001464220080000101
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 to the eighth lens element E8 are aspheric. In the present embodiment, the surface shape x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:
Figure BDA0001464220080000102
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 the conic coefficient (given in table 1); ai is the correction coefficient of the aspherical i-th order. Table 2 below shows the higher order coefficients A that can be used for each of the aspherical mirrors S1-S16 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 8.5886E-04 -2.1473E-03 1.8965E-03 1.0452E-03 -3.6155E-03 3.3201E-03 -1.5200E-03 3.4732E-04 -3.2747E-05
S2 -2.7810E-02 6.2108E-02 -8.0208E-02 7.0162E-02 -4.1483E-02 1.5522E-02 -3.3211E-03 3.2489E-04 -5.6616E-06
S3 -1.0570E-01 3.4738E-02 1.5408E-01 -5.0365E-01 8.0426E-01 -7.5885E-01 4.2875E-01 -1.3341E-01 1.7497E-02
S4 -8.0862E-02 -3.8579E-02 5.3233E-01 -2.0010E+00 4.5366E+00 -6.4322E+00 5.5937E+00 -2.7232E+00 5.7107E-01
S5 -1.0700E-03 -2.6583E-01 1.2946E+00 -4.2862E+00 8.9748E+00 -1.1970E+01 9.8617E+00 -4.5690E+00 9.1139E-01
S6 6.2762E-02 -7.0295E-01 2.2976E+00 -5.0095E+00 7.4323E+00 -7.3943E+00 4.7367E+00 -1.7685E+00 2.9293E-01
S7 1.9345E-01 -1.3529E+00 3.7316E+00 -6.8347E+00 8.3223E+00 -6.5672E+00 3.1981E+00 -8.6153E-01 9.6898E-02
S8 3.0481E-01 -1.4390E+00 3.4010E+00 -5.3002E+00 5.4408E+00 -3.6611E+00 1.5619E+00 -3.8453E-01 4.2181E-02
S9 2.1927E-01 -8.7917E-01 1.8829E+00 -2.4579E+00 2.0451E+00 -1.0965E+00 3.6886E-01 -7.0942E-02 5.9445E-03
S10 2.6143E-03 -1.6573E-01 2.5351E-01 -1.5797E-01 3.3891E-02 1.2797E-02 -9.5076E-03 2.1968E-03 -1.9202E-04
S11 4.8603E-02 -1.0400E-01 8.2001E-02 -2.6670E-02 -3.9947E-02 5.6194E-02 -3.0262E-02 7.7042E-03 -7.6013E-04
S12 7.3830E-02 -2.1772E-01 3.1788E-01 -3.0583E-01 1.8183E-01 -6.5203E-02 1.3743E-02 -1.5668E-03 7.4415E-05
S13 2.2371E-01 -4.7305E-01 5.2207E-01 -4.1151E-01 2.1024E-01 -6.5364E-02 1.1890E-02 -1.1580E-03 4.6189E-05
S14 2.7156E-01 -3.5241E-01 2.5669E-01 -1.3345E-01 4.9502E-02 -1.2429E-02 1.9704E-03 -1.7618E-04 6.7386E-06
S15 1.1571E-02 -7.9185E-02 7.7459E-02 -3.6334E-02 9.9240E-03 -1.6523E-03 1.6508E-04 -9.0767E-06 2.1014E-07
S16 -7.3146E-02 2.1674E-02 -3.6900E-03 8.7609E-04 -3.4110E-04 8.2677E-05 -1.0693E-05 7.0730E-07 -1.9052E-08
TABLE 2
Table 3 gives the effective focal lengths f1 to f8 of the respective lenses in embodiment 1, the total effective focal length f of the imaging lens group, the total optical length TTL of the imaging lens group (i.e., the distance on the optical axis from the center of the object side surface S1 of the first lens E1 to the imaging surface S17), half the diagonal length ImgH of the effective pixel area on the imaging surface S17, and the maximum half field angle FOV of the imaging lens group.
f1(mm) 4.50 f7(mm) -46.83
f2(mm) -10.53 f8(mm) -2.35
f3(mm) 12.59 f(mm) 4.53
f4(mm) -61.19 TTL(mm) 5.50
f5(mm) 40.12 ImgH(mm) 3.77
f6(mm) 3.42 FOV(°) 78.6
TABLE 3 Table 3
The imaging lens group in embodiment 1 satisfies:
f/epd=1.71, where f is the total effective focal length of the imaging lens group, EPD is the entrance pupil diameter of the imaging lens group;
TTL/imgh=1.46, where TTL is the optical total length of the imaging lens group, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface S17;
f2/f= -2.32, where f2 is the effective focal length of the second lens E2, and f is the total effective focal length of the imaging lens group;
f4/f= -13.50, where f4 is the effective focal length of the fourth lens E4, and f is the total effective focal length of the imaging lens group;
f7/f= -10.33, where f7 is the effective focal length of the seventh lens E7, and f is the total effective focal length of the imaging lens group;
r11/r12=7.75, where R11 is a radius of curvature of the object-side surface S11 of the sixth lens element E6, and R12 is a radius of curvature of the image-side surface S12 of the sixth lens element E6;
CT1/CT2 = 4.53, wherein CT1 is the center thickness of the first lens element E1 on the optical axis, and CT2 is the center thickness of the second lens element E2 on the optical axis;
(TTL/ImgH)/(f/EPD) =0.85, wherein TTL is the total optical length of the image capturing lens group, imgH is half of the diagonal length of the effective pixel area on the imaging surface S17, f is the total effective focal length of the image capturing lens group, and EPD is the entrance pupil diameter of the image capturing lens group;
f7/f8=19.92, where f7 is the effective focal length of the seventh lens E7 and f8 is the effective focal length of the eighth lens E8;
f7/r6=6.81, where f7 is the effective focal length of the seventh lens E7 and R6 is the radius of curvature of the image-side surface S6 of the third lens E3.
Fig. 2A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 1, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens group. Fig. 2B shows an astigmatism curve of the imaging lens group of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows a distortion curve of the image pickup lens group of embodiment 1, which represents distortion magnitude values in the case of different angles of view. Fig. 2D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 1, which represents a deviation of different image heights on the imaging plane after light passes through the lens group. As can be seen from fig. 2A to 2D, the imaging lens group provided in embodiment 1 can achieve good imaging quality.
Example 2
An image pickup lens group 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 portions similar to embodiment 1 will be omitted for brevity. Fig. 3 shows a schematic configuration diagram of an image pickup lens group according to embodiment 2 of the present application.
As shown in fig. 3, the image pickup lens group according to the exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave; the second lens element E2 has negative 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 concave, 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 positive 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 with positive refractive power has a concave object-side surface S11 and a convex image-side surface S12; the seventh lens element E7 with negative refractive power has a concave object-side surface S13 and a convex image-side surface S14; the eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Optionally, the image pickup lens group in the present embodiment further includes a stop STO disposed between the second lens E2 and the third lens E3.
Table 4 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the imaging lens group of example 2, in which the units of the radii of curvature and the thicknesses are millimeters (mm). Table 5 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 6 shows the effective focal lengths f1 to f8 of the respective lenses in embodiment 2, the total effective focal length f of the imaging lens group, the total optical length TTL of the imaging lens group, half the diagonal length ImgH of the effective pixel region on the imaging surface S17, and the maximum half field angle FOV of the imaging lens group.
Figure BDA0001464220080000141
TABLE 4 Table 4
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.2955E-03 -4.0303E-03 5.0713E-03 -1.5162E-03 -2.9843E-03 3.7938E-03 -1.9269E-03 4.6549E-04 -4.5487E-05
S2 -2.7204E-02 5.9210E-02 -7.3851E-02 6.1954E-02 -3.4337E-02 1.1336E-02 -1.7820E-03 8.2376E-06 2.1874E-05
S3 -1.0630E-01 3.3132E-02 1.4412E-01 -4.4025E-01 6.6736E-01 -6.0158E-01 3.2552E-01 -9.6928E-02 1.2119E-02
S4 -7.7572E-02 -6.1847E-02 5.9983E-01 -2.0940E+00 4.5736E+00 -6.3531E+00 5.4566E+00 -2.6343E+00 5.4903E-01
S5 7.5542E-03 -3.1809E-01 1.4814E+00 -4.6569E+00 9.3142E+00 -1.1927E+01 9.4805E+00 -4.2580E+00 8.2727E-01
S6 6.3017E-02 -7.2623E-01 2.4088E+00 -5.3047E+00 7.9219E+00 -7.9111E+00 5.0735E+00 -1.8914E+00 3.1205E-01
S7 1.9192E-01 -1.3488E+00 3.7286E+00 -6.8547E+00 8.3850E+00 -6.6532E+00 3.2628E+00 -8.8779E-01 1.0139E-01
S8 3.0504E-01 -1.4336E+00 3.3847E+00 -5.2849E+00 5.4494E+00 -3.6912E+00 1.5876E+00 -3.9432E-01 4.3658E-02
S9 2.2399E-01 -9.0582E-01 1.9519E+00 -2.5588E+00 2.1371E+00 -1.1513E+00 3.9048E-01 -7.6193E-02 6.5418E-03
S10 1.4899E-03 -1.6062E-01 2.3594E-01 -1.1465E-01 -2.9012E-02 6.5053E-02 -3.4189E-02 8.3831E-03 -8.3023E-04
S11 4.4031E-02 -9.1718E-02 6.1222E-02 -3.2334E-03 -5.6587E-02 6.3047E-02 -3.1607E-02 7.7277E-03 -7.3889E-04
S12 7.4221E-02 -2.1427E-01 3.0770E-01 -2.9345E-01 1.7322E-01 -6.1514E-02 1.2776E-02 -1.4242E-03 6.5330E-05
S13 2.2395E-01 -4.7080E-01 5.1804E-01 -4.1026E-01 2.1193E-01 -6.6990E-02 1.2480E-02 -1.2583E-03 5.2890E-05
S14 2.7276E-01 -3.5611E-01 2.6034E-01 -1.3585E-01 5.0567E-02 -1.2743E-02 2.0289E-03 -1.8238E-04 7.0252E-06
S15 1.1468E-02 -8.1706E-02 8.1395E-02 -3.9003E-02 1.0916E-02 -1.8670E-03 1.9206E-04 -1.0895E-05 2.6081E-07
S16 -7.2480E-02 2.1938E-02 -3.6893E-03 8.0384E-04 -3.1144E-04 7.7140E-05 -1.0152E-05 6.8082E-07 -1.8538E-08
TABLE 5
Figure BDA0001464220080000142
Figure BDA0001464220080000151
TABLE 6
Fig. 4A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 2, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens group. Fig. 4B shows an astigmatism curve of the imaging lens group of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the image pickup lens group of embodiment 2, which represents distortion magnitude values in the case of different angles of view. Fig. 4D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 2, which represents a deviation of different image heights on the imaging plane after light passes through the lens group. As can be seen from fig. 4A to 4D, the imaging lens group provided in embodiment 2 can achieve good imaging quality.
Example 3
An image pickup lens group according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic configuration diagram of an image pickup lens group according to embodiment 3 of the present application.
As shown in fig. 5, the image pickup lens group according to the exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave; the second lens element E2 has negative 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 concave, 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 concave, 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 with positive refractive power has a concave object-side surface S11 and a convex image-side surface S12; the seventh lens element E7 with negative refractive power has a concave object-side surface S13 and a convex image-side surface S14; the eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Optionally, the image pickup lens group in the present embodiment further includes a stop STO disposed between the second lens E2 and the third lens E3.
Table 7 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the imaging lens group of example 3, in which the units of the radii of curvature and the thicknesses are millimeters (mm). Table 8 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 9 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 3, a total effective focal length f of the imaging lens group, an optical total length TTL of the imaging lens group, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle FOV of the imaging lens group.
Figure BDA0001464220080000161
TABLE 7
Figure BDA0001464220080000162
Figure BDA0001464220080000171
TABLE 8
f1(mm) 4.44 f7(mm) -97.22
f2(mm) -9.97 f8(mm) -2.27
f3(mm) 12.08 f(mm) 4.53
f4(mm) 37.74 TTL(mm) 4.64
f5(mm) -100.02 ImgH(mm) 3.73
f6(mm) 3.48 FOV(°) 78.4
TABLE 9
Fig. 6A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 3, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens group. Fig. 6B shows an astigmatism curve of the imaging lens group of embodiment 3, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the image pickup lens group of embodiment 3, which represents distortion magnitude values in the case of different angles of view. Fig. 6D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 3, which represents a deviation of different image heights on the imaging plane after light passes through the lens group. As can be seen from fig. 6A to 6D, the imaging lens group according to embodiment 3 can achieve good imaging quality.
Example 4
An image pickup lens group according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic configuration diagram of an image pickup lens group according to embodiment 4 of the present application.
As shown in fig. 7, the image pickup lens group according to the exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave; the second lens element E2 has negative 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 concave, and an image-side surface S6 thereof is convex; the fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave; the fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex; the sixth lens element E6 with positive refractive power has a concave object-side surface S11 and a convex image-side surface S12; the seventh lens element E7 with positive refractive power has a concave object-side surface S13 and a convex image-side surface S14; the eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Optionally, the image pickup lens group in the present embodiment further includes a stop STO disposed between the second lens E2 and the third lens E3.
Table 10 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the imaging lens group of example 4, in which the units of the radii of curvature and the thicknesses are millimeters (mm). Table 11 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 4, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 12 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 4, a total effective focal length f of the imaging lens group, an optical total length TTL of the imaging lens group, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle FOV of the imaging lens group.
Figure BDA0001464220080000181
Figure BDA0001464220080000191
Table 10
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 9.5371E-04 -3.1817E-03 4.3482E-03 -1.8532E-03 -1.8125E-03 2.8103E-03 -1.5189E-03 3.7870E-04 -3.7750E-05
S2 -2.7604E-02 6.4584E-02 -8.9819E-02 8.6017E-02 -5.6051E-02 2.3525E-02 -5.9395E-03 7.9656E-04 -4.1791E-05
S3 -1.0698E-01 4.1594E-02 1.2792E-01 -4.4246E-01 7.1504E-01 -6.7504E-01 3.7914E-01 -1.1663E-01 1.5038E-02
S4 -8.4503E-02 -1.4209E-02 4.4744E-01 -1.8347E+00 4.3666E+00 -6.3808E+00 5.6559E+00 -2.7865E+00 5.8850E-01
S5 -8.0220E-03 -1.8936E-01 9.0778E-01 -3.1362E+00 6.8267E+00 -9.4272E+00 8.0091E+00 -3.8101E+00 7.7751E-01
S6 6.2941E-02 -7.0197E-01 2.2907E+00 -4.9836E+00 7.3712E+00 -7.3053E+00 4.6586E+00 -1.7303E+00 2.8488E-01
S7 1.9265E-01 -1.3516E+00 3.7328E+00 -6.8414E+00 8.3325E+00 -6.5767E+00 3.2043E+00 -8.6423E-01 9.7443E-02
S8 3.0478E-01 -1.4387E+00 3.4005E+00 -5.3010E+00 5.4441E+00 -3.6665E+00 1.5665E+00 -3.8664E-01 4.2595E-02
S9 2.1887E-01 -8.7984E-01 1.8852E+00 -2.4621E+00 2.0510E+00 -1.1020E+00 3.7207E-01 -7.1980E-02 6.0863E-03
S10 2.9566E-03 -1.6388E-01 2.5016E-01 -1.5332E-01 2.7830E-02 1.8162E-02 -1.2281E-02 2.9564E-03 -2.7701E-04
S11 4.6423E-02 -9.6819E-02 7.2316E-02 -1.8905E-02 -4.3921E-02 5.7477E-02 -3.0445E-02 7.6784E-03 -7.5093E-04
S12 7.6714E-02 -2.2576E-01 3.2799E-01 -3.1634E-01 1.9043E-01 -6.9810E-02 1.5219E-02 -1.8226E-03 9.2852E-05
S13 2.1520E-01 -4.5862E-01 5.0773E-01 -4.0313E-01 2.0817E-01 -6.5743E-02 1.2243E-02 -1.2346E-03 5.1888E-05
S14 2.8096E-01 -3.6248E-01 2.6604E-01 -1.3968E-01 5.2393E-02 -1.3311E-02 2.1366E-03 -1.9366E-04 7.5267E-06
S15 2.1290E-02 -1.0170E-01 9.8207E-02 -4.6731E-02 1.3069E-02 -2.2406E-03 2.3169E-04 -1.3267E-05 3.2257E-07
S16 -7.5294E-02 2.3261E-02 -3.9773E-03 6.8605E-04 -2.2951E-04 5.6583E-05 -7.4708E-06 5.0095E-07 -1.3679E-08
TABLE 11
f1(mm) 4.44 f7(mm) 100.03
f2(mm) -9.96 f8(mm) -2.26
f3(mm) 12.55 f(mm) 4.52
f4(mm) -150.97 TTL(mm) 5.50
f5(mm) 58.38 ImgH(mm) 3.75
f6(mm) 3.61 FOV(°) 78.2
Table 12
Fig. 8A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 4, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens group. Fig. 8B shows an astigmatism curve of the imaging lens group of embodiment 4, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8C shows a distortion curve of the image pickup lens group of embodiment 4, which represents distortion magnitude values in the case of different angles of view. Fig. 8D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 4, which represents a deviation of different image heights on the imaging plane after light passes through the lens group. As can be seen from fig. 8A to 8D, the imaging lens group provided in embodiment 4 can achieve good imaging quality.
Example 5
An image pickup lens group according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic configuration diagram of an image pickup lens group according to embodiment 5 of the present application.
As shown in fig. 9, the image pickup lens group according to the exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave; the second lens element E2 has negative 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 concave, and an image-side surface S6 thereof is convex; the fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave; the fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex; the sixth lens element E6 with positive refractive power has a concave object-side surface S11 and a convex image-side surface S12; the seventh lens element E7 with negative refractive power has a concave object-side surface S13 and a convex image-side surface S14; the eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Optionally, the image pickup lens group in the present embodiment further includes a stop STO disposed between the second lens E2 and the third lens E3.
Table 13 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the imaging lens group of example 5, in which the units of the radii of curvature and the thicknesses are millimeters (mm). Table 14 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 5, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 15 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 5, a total effective focal length f of the imaging lens group, an optical total length TTL of the imaging lens group, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle FOV of the imaging lens group.
Figure BDA0001464220080000211
TABLE 13
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -5.9655E-04 4.3365E-03 -1.7058E-02 3.1307E-02 -3.1808E-02 1.9121E-02 -6.7539E-03 1.2934E-03 -1.0491E-04
S2 -3.3357E-02 7.6078E-02 -1.0436E-01 1.0034E-01 -6.6726E-02 2.9133E-02 -7.8845E-03 1.1927E-03 -7.7332E-05
S3 -1.0372E-01 3.9535E-02 1.2940E-01 -4.4164E-01 6.9309E-01 -6.2900E-01 3.3752E-01 -9.8903E-02 1.2144E-02
S4 -7.2823E-02 -4.6095E-02 5.6512E-01 -2.1784E+00 4.9177E+00 -6.7856E+00 5.6508E+00 -2.6061E+00 5.1321E-01
S5 -4.5950E-04 -2.7272E-01 1.2739E+00 -3.9833E+00 7.8692E+00 -9.8756E+00 7.6409E+00 -3.3202E+00 6.2018E-01
S6 6.2325E-02 -6.8315E-01 2.1912E+00 -4.6816E+00 6.8169E+00 -6.6394E+00 4.1361E+00 -1.4883E+00 2.3519E-01
S7 1.9491E-01 -1.3534E+00 3.7322E+00 -6.8567E+00 8.4074E+00 -6.7145E+00 3.3313E+00 -9.2329E-01 1.0842E-01
S8 3.0384E-01 -1.4410E+00 3.4041E+00 -5.3026E+00 5.4416E+00 -3.6585E+00 1.5574E+00 -3.8159E-01 4.1463E-02
S9 2.1863E-01 -8.7699E-01 1.8773E+00 -2.4501E+00 2.0381E+00 -1.0924E+00 3.6744E-01 -7.0696E-02 5.9310E-03
S10 3.2345E-03 -1.6557E-01 2.4793E-01 -1.5147E-01 3.0532E-02 1.3589E-02 -9.6206E-03 2.2436E-03 -2.0292E-04
S11 5.3398E-02 -1.2180E-01 1.1339E-01 -6.2046E-02 -1.3682E-02 4.3620E-02 -2.6556E-02 7.0942E-03 -7.1664E-04
S12 7.3342E-02 -2.1264E-01 3.1098E-01 -2.9885E-01 1.7771E-01 -6.4147E-02 1.3746E-02 -1.6155E-03 8.0611E-05
S13 2.2685E-01 -4.7835E-01 5.3230E-01 -4.2494E-01 2.2036E-01 -6.9870E-02 1.3072E-02 -1.3275E-03 5.6462E-05
S14 2.7142E-01 -3.5191E-01 2.5558E-01 -1.3232E-01 4.8872E-02 -1.2223E-02 1.9307E-03 -1.7200E-04 6.5524E-06
S15 1.2419E-02 -8.5358E-02 8.5394E-02 -4.1013E-02 1.1450E-02 -1.9471E-03 1.9882E-04 -1.1195E-05 2.6634E-07
S16 -7.7602E-02 2.4645E-02 -5.2011E-03 1.5461E-03 -5.5990E-04 1.2846E-04 -1.6407E-05 1.0948E-06 -3.0027E-08
TABLE 14
f1(mm) 4.84 f7(mm) -46.16
f2(mm) -13.87 f8(mm) -2.35
f3(mm) 12.86 f(mm) 4.49
f4(mm) -194.71 TTL(mm) 5.50
f5(mm) 60.21 ImgH(mm) 3.77
f6(mm) 3.39 FOV(°) 79.3
TABLE 15
Fig. 10A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 5, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens group. Fig. 10B shows an astigmatism curve of the imaging lens group of embodiment 5, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 10C shows a distortion curve of the image pickup lens group of embodiment 5, which represents distortion magnitude values in the case of different angles of view. Fig. 10D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 5, which represents a deviation of different image heights on the imaging plane after light passes through the lens group. As can be seen from fig. 10A to 10D, the imaging lens group provided in embodiment 5 can achieve good imaging quality.
Example 6
An image pickup lens group according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic configuration diagram of an image pickup lens group according to embodiment 6 of the present application.
As shown in fig. 11, the image pickup lens group according to the exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave; the second lens element E2 has negative 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 concave, and an image-side surface S6 thereof is convex; the fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave; the fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave; the sixth lens element E6 with positive refractive power has a concave object-side surface S11 and a convex image-side surface S12; the seventh lens element E7 with negative refractive power has a concave object-side surface S13 and a convex image-side surface S14; the eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Optionally, the image pickup lens group in the present embodiment further includes a stop STO disposed between the second lens E2 and the third lens E3.
Table 16 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the imaging lens group of example 6, in which the units of the radii of curvature and the thicknesses are millimeters (mm). Table 17 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 6, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 18 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 6, a total effective focal length f of the imaging lens group, an optical total length TTL of the imaging lens group, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle FOV of the imaging lens group.
Figure BDA0001464220080000231
Table 16
Figure BDA0001464220080000232
Figure BDA0001464220080000241
TABLE 17
f1(mm) 4.56 f7(mm) -58.84
f2(mm) -12.13 f8(mm) -2.38
f3(mm) 13.48 f(mm) 4.46
f4(mm) -27.75 TTL(mm) 5.50
f5(mm) 23.85 ImgH(mm) 3.77
f6(mm) 3.38 FOV(°) 79.5
TABLE 18
Fig. 12A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 6, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens group. Fig. 12B shows an astigmatism curve of the imaging lens group of embodiment 6, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 12C shows a distortion curve of the image pickup lens group of embodiment 6, which represents distortion magnitude values in the case of different angles of view. Fig. 12D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 6, which represents a deviation of different image heights on the imaging plane after light passes through the lens group. As can be seen from fig. 12A to 12D, the image pickup lens group given in embodiment 6 can achieve good imaging quality.
Example 7
An image pickup lens group according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 shows a schematic configuration diagram of an image pickup lens group according to embodiment 7 of the present application.
As shown in fig. 13, the image pickup lens group according to the exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave; the second lens element E2 has negative 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 concave, and an image-side surface S6 thereof is convex; the fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave; the fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave; the sixth lens element E6 with positive refractive power has a concave object-side surface S11 and a convex image-side surface S12; the seventh lens element E7 with negative refractive power has a concave object-side surface S13 and a convex image-side surface S14; the eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Optionally, the image pickup lens group in the present embodiment further includes a stop STO disposed between the second lens E2 and the third lens E3.
Table 19 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the imaging lens group of example 7, in which the units of the radii of curvature and the thicknesses are millimeters (mm). Table 20 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 7, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 21 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 7, a total effective focal length f of the imaging lens group, an optical total length TTL of the imaging lens group, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle FOV of the imaging lens group.
Figure BDA0001464220080000251
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Figure BDA0001464220080000261
TABLE 19
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 6.5400E-03 -1.6727E-02 3.5854E-02 -5.0862E-02 4.6677E-02 -2.6974E-02 9.4548E-03 -1.8175E-03 1.4408E-04
S2 -5.0085E-02 1.1672E-01 -1.5133E-01 1.3418E-01 -8.1803E-02 3.3385E-02 -8.7439E-03 1.3350E-03 -9.0947E-05
S3 -7.4827E-02 3.7887E-02 -2.6713E-02 4.2004E-02 -7.0994E-02 7.0488E-02 -3.8444E-02 1.1008E-02 -1.2983E-03
S4 -2.9573E-02 -7.6737E-02 1.6332E-01 -2.1996E-01 2.3411E-01 -2.0396E-01 1.3382E-01 -5.3315E-02 9.3625E-03
S5 -6.1997E-03 -8.4195E-02 2.3586E-01 -5.3356E-01 7.4776E-01 -6.4636E-01 3.3665E-01 -9.6735E-02 1.1722E-02
S6 1.5393E-01 -9.8286E-01 2.6308E+00 -4.5434E+00 5.2393E+00 -3.9877E+00 1.9189E+00 -5.2830E-01 6.3405E-02
S7 1.7406E-01 -1.1283E+00 2.7362E+00 -4.3218E+00 4.5720E+00 -3.1924E+00 1.4092E+00 -3.5403E-01 3.8338E-02
S8 1.7761E-01 -7.6274E-01 1.5010E+00 -1.9243E+00 1.5679E+00 -8.0645E-01 2.5835E-01 -4.7891E-02 4.0901E-03
S9 1.4871E-01 -4.9931E-01 9.5909E-01 -1.0998E+00 7.3768E-01 -2.8359E-01 5.7947E-02 -4.7283E-03 -5.5753E-05
S10 -3.8847E-02 5.3279E-02 -1.6260E-01 3.2378E-01 -3.4528E-01 2.0805E-01 -7.1905E-02 1.3475E-02 -1.0749E-03
S11 -1.8797E-03 7.6391E-03 -3.5534E-02 3.3444E-02 -4.0511E-02 3.7505E-02 -1.9271E-02 4.9620E-03 -4.9691E-04
S12 6.8107E-02 -1.4657E-01 1.4969E-01 -1.1205E-01 5.0912E-02 -1.1427E-02 5.3579E-04 2.2506E-04 -2.9721E-05
S13 2.3114E-01 -3.7251E-01 2.6909E-01 -1.3289E-01 3.9072E-02 -3.8174E-03 -9.2643E-04 2.7027E-04 -1.9553E-05
S14 2.8890E-01 -3.6405E-01 2.3776E-01 -1.0393E-01 3.0973E-02 -6.0953E-03 7.4686E-04 -5.0690E-05 1.4194E-06
S15 6.7164E-02 -1.8462E-01 1.5580E-01 -7.0447E-02 1.9642E-02 -3.4926E-03 3.8743E-04 -2.4490E-05 6.7366E-07
S16 -8.7622E-02 1.8052E-02 6.7305E-04 -2.8729E-04 -2.4356E-04 9.7119E-05 -1.5020E-05 1.1188E-06 -3.3553E-08
Table 20
f1(mm) 5.49 f7(mm) -44.89
f2(mm) -24.14 f8(mm) -2.53
f3(mm) 12.62 f(mm) 4.35
f4(mm) -10.71 TTL(mm) 5.50
f5(mm) 10.90 ImgH(mm) 3.55
f6(mm) 3.32 FOV(°) 77.5
Table 21
Fig. 14A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 7, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens group. Fig. 14B shows an astigmatism curve of the imaging lens group of embodiment 7, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 14C shows a distortion curve of the image pickup lens group of embodiment 7, which represents distortion magnitude values in the case of different angles of view. Fig. 14D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 7, which represents a deviation of different image heights on the imaging plane after light passes through the lens group. As can be seen from fig. 14A to 14D, the image pickup lens group provided in embodiment 7 can achieve good imaging quality.
Example 8
An image pickup lens group according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic configuration diagram of an image pickup lens group according to embodiment 8 of the present application.
As shown in fig. 15, the image pickup lens group according to the exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave; the second lens element E2 has negative 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 negative refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave; the fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave; the sixth lens element E6 with positive refractive power has a concave object-side surface S11 and a convex image-side surface S12; the seventh lens element E7 with negative refractive power has a concave object-side surface S13 and a convex image-side surface S14; the eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. Light from the object sequentially passes through the surfaces S1 to S16 and finally imaged on an imaging surface S17.
Optionally, the image pickup lens group in the present embodiment further includes a stop STO disposed between the second lens E2 and the third lens E3.
Table 22 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the imaging lens group of example 8, in which the units of the radii of curvature and the thicknesses are millimeters (mm). Table 23 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 8, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 24 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 8, a total effective focal length f of the imaging lens group, an optical total length TTL of the imaging lens group, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle FOV of the imaging lens group.
Figure BDA0001464220080000281
Table 22
Figure BDA0001464220080000282
Figure BDA0001464220080000291
Table 23
f1(mm) 5.87 f7(mm) -97.92
f2(mm) -24.48 f8(mm) -2.63
f3(mm) 11.16 f(mm) 4.14
f4(mm) -8.42 TTL(mm) 5.45
f5(mm) 8.65 ImgH(mm) 3.44
f6(mm) 3.27 FOV(°) 78.4
Table 24
Fig. 16A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 8, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens group. Fig. 16B shows an astigmatism curve of the imaging lens group of embodiment 8, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 16C shows a distortion curve of the image pickup lens group of embodiment 8, which represents distortion magnitude values in the case of different angles of view. Fig. 16D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 8, which represents a deviation of different image heights on the imaging plane after light passes through the lens group. As can be seen from fig. 16A to 16D, the image pickup lens group given in embodiment 8 can achieve good imaging quality.
Example 9
An image pickup lens group according to embodiment 9 of the present application is described below with reference to fig. 17 to 18D. Fig. 17 shows a schematic configuration diagram of an image pickup lens group according to embodiment 9 of the present application.
As shown in fig. 17, the image pickup lens group according to the exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave; the second lens element E2 has negative 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 negative refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave; the fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave; the sixth lens element E6 with positive refractive power has a concave object-side surface S11 and a convex image-side surface S12; the seventh lens element E7 with positive refractive power has a concave object-side surface S13 and a convex image-side surface S14; the eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Optionally, the image pickup lens group in the present embodiment further includes a stop STO disposed between the second lens E2 and the third lens E3.
Table 25 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the imaging lens group of example 9, in which the units of the radii of curvature and the thicknesses are millimeters (mm). Table 26 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 9, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 27 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 9, a total effective focal length f of the imaging lens group, an optical total length TTL of the imaging lens group, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle FOV of the imaging lens group.
Figure BDA0001464220080000301
Figure BDA0001464220080000311
Table 25
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.1744E-02 -1.9888E-02 3.7203E-02 -5.4181E-02 5.2462E-02 -3.1715E-02 1.1485E-02 -2.2488E-03 1.7846E-04
S2 -5.9188E-02 1.5138E-01 -1.9929E-01 1.7487E-01 -1.0212E-01 3.7091E-02 -7.5485E-03 6.5225E-04 1.8126E-06
S3 -7.8302E-02 6.5293E-02 -9.0976E-02 1.4679E-01 -1.9309E-01 1.5584E-01 -7.3716E-02 1.9258E-02 -2.1637E-03
S4 -1.5024E-02 -1.9634E-01 6.0759E-01 -1.2269E+00 1.6635E+00 -1.5015E+00 8.5800E-01 -2.7820E-01 3.8975E-02
S5 1.5390E-02 -1.7212E-01 5.8129E-01 -1.4079E+00 2.1608E+00 -2.0864E+00 1.2248E+00 -3.9829E-01 5.5017E-02
S6 1.4337E-01 -7.1698E-01 1.5908E+00 -2.3373E+00 2.3649E+00 -1.6408E+00 7.4729E-01 -2.0069E-01 2.3989E-02
S7 9.2800E-02 -5.8667E-01 1.0600E+00 -1.1609E+00 7.5827E-01 -2.6120E-01 2.7102E-02 9.0109E-03 -2.2167E-03
S8 1.5549E-01 -5.5891E-01 9.4076E-01 -1.0984E+00 8.6182E-01 -4.6816E-01 1.8372E-01 -4.7891E-02 6.0094E-03
S9 7.0956E-02 -6.3793E-02 -1.4140E-01 5.3551E-01 -7.8454E-01 6.0719E-01 -2.6061E-01 5.9021E-02 -5.5343E-03
S10 -3.5478E-02 1.3032E-01 -3.7496E-01 6.4297E-01 -6.5645E-01 4.0340E-01 -1.4802E-01 3.0106E-02 -2.6149E-03
S11 -4.7776E-02 1.6641E-01 -3.4933E-01 4.0046E-01 -3.1290E-01 1.7053E-01 -6.0599E-02 1.2248E-02 -1.0426E-03
S12 1.0432E-01 -2.3244E-01 2.1920E-01 -1.3764E-01 5.1965E-02 -7.3890E-03 -1.6635E-03 7.4403E-04 -7.7260E-05
S13 3.3907E-01 -5.2625E-01 3.8498E-01 -1.7198E-01 3.4892E-02 3.5847E-03 -3.2056E-03 5.7492E-04 -3.5072E-05
S14 3.3959E-01 -4.3985E-01 2.9580E-01 -1.3689E-01 4.4838E-02 -1.0101E-02 1.4780E-03 -1.2537E-04 4.6357E-06
S15 7.2662E-02 -2.7268E-01 2.5475E-01 -1.2305E-01 3.5913E-02 -6.6026E-03 7.5134E-04 -4.8466E-05 1.3553E-06
S16 -9.9448E-02 2.9300E-03 2.5877E-02 -1.3995E-02 3.7806E-03 -6.1092E-04 6.0017E-05 -3.3191E-06 7.9393E-08
Table 26
f1(mm) 7.10 f7(mm) 161.30
f2(mm) -37.03 f8(mm) -2.65
f3(mm) 9.10 f(mm) 3.84
f4(mm) -7.58 TTL(mm) 5.32
f5(mm) 8.24 ImgH(mm) 3.44
f6(mm) 3.13 FOV(°) 82.6
Table 27
Fig. 18A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 9, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens group. Fig. 18B shows an astigmatism curve of the imaging lens group of embodiment 9, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 18C shows a distortion curve of the image pickup lens group of embodiment 9, which represents distortion magnitude values in the case of different angles of view. Fig. 18D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 9, which represents a deviation of different image heights on the imaging plane after light passes through the lens group. As can be seen from fig. 18A to 18D, the image pickup lens group given in embodiment 9 can achieve good imaging quality.
Example 10
An image pickup lens group according to embodiment 10 of the present application is described below with reference to fig. 19 to 20D. Fig. 19 shows a schematic configuration diagram of an image pickup lens group according to embodiment 10 of the present application.
As shown in fig. 19, the image pickup lens group according to the exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, 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 concave, and an image-side surface S6 thereof is convex; the fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave; the fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex; the sixth lens element E6 with positive refractive power has a concave object-side surface S11 and a convex image-side surface S12; the seventh lens element E7 with negative refractive power has a concave object-side surface S13 and a convex image-side surface S14; the eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Optionally, the image pickup lens group in the present embodiment further includes a stop STO disposed between the second lens E2 and the third lens E3.
Table 28 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the imaging lens group of example 10, in which the units of the radii of curvature and the thicknesses are millimeters (mm). Table 29 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 10, where each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 30 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 10, a total effective focal length f of the imaging lens group, an optical total length TTL of the imaging lens group, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle FOV of the imaging lens group.
Figure BDA0001464220080000321
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Figure BDA0001464220080000331
Table 28
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 3.3490E-03 -1.8975E-02 4.8288E-02 -7.1079E-02 6.4955E-02 -3.7161E-02 1.2934E-02 -2.5186E-03 2.1075E-04
S2 -2.2112E-02 2.6682E-02 -1.3968E-02 3.0379E-03 -1.9430E-03 2.8701E-03 -1.8230E-03 5.5065E-04 -6.8511E-05
S3 -1.3148E-01 1.3939E-01 -1.9207E-01 2.4951E-01 -2.3558E-01 1.5255E-01 -6.5103E-02 1.9194E-02 -3.4181E-03
S4 -7.6492E-02 9.4342E-02 -4.4730E-01 1.4755E+00 -2.9530E+00 3.7254E+00 -2.8654E+00 1.2284E+00 -2.2172E-01
S5 -1.0978E-02 -2.1028E-01 1.0060E+00 -3.2253E+00 6.5228E+00 -8.3896E+00 6.6807E+00 -3.0016E+00 5.8249E-01
S6 6.0813E-02 -6.8049E-01 2.1648E+00 -4.6282E+00 6.7594E+00 -6.5986E+00 4.1286E+00 -1.5021E+00 2.4259E-01
S7 1.9943E-01 -1.3797E+00 3.7490E+00 -6.7991E+00 8.2170E+00 -6.4144E+00 3.0615E+00 -7.9394E-01 8.2985E-02
S8 2.9754E-01 -1.3995E+00 3.2739E+00 -5.0213E+00 5.0568E+00 -3.3187E+00 1.3671E+00 -3.1986E-01 3.2605E-02
S9 2.0467E-01 -8.0886E-01 1.7449E+00 -2.3244E+00 2.0071E+00 -1.1405E+00 4.1610E-01 -8.8762E-02 8.4134E-03
S10 -1.1395E-03 -1.2859E-01 1.6142E-01 -6.5531E-02 7.7685E-03 -1.5645E-02 2.0540E-02 -8.9237E-03 1.3177E-03
S11 3.9514E-02 -1.0637E-01 1.0319E-01 -9.5311E-02 6.3693E-02 -2.7052E-02 7.3729E-03 -1.4152E-03 1.6620E-04
S12 6.0843E-02 -1.6018E-01 1.9649E-01 -1.6326E-01 8.2918E-02 -2.3772E-02 3.4381E-03 -1.6401E-04 -6.1042E-06
S13 1.8072E-01 -3.5537E-01 3.3637E-01 -2.1392E-01 7.8408E-02 -1.1963E-02 -8.8430E-04 5.0439E-04 -4.4587E-05
S14 2.3995E-01 -2.9180E-01 1.9866E-01 -9.6315E-02 3.3402E-02 -7.8555E-03 1.1688E-03 -9.8361E-05 3.5503E-06
S15 1.6458E-02 -6.0754E-02 4.9329E-02 -1.9708E-02 4.6188E-03 -6.6260E-04 5.7212E-05 -2.7288E-06 5.5144E-08
S16 -5.8665E-02 1.5719E-02 -3.0401E-03 8.1089E-04 -2.4196E-04 4.6047E-05 -4.9599E-06 2.8235E-07 -6.6700E-09
Table 29
Figure BDA0001464220080000332
Figure BDA0001464220080000341
Table 30
Fig. 20A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 10, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens group. Fig. 20B shows an astigmatism curve of the imaging lens group of embodiment 10, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 20C shows a distortion curve of the image pickup lens group of embodiment 10, which represents distortion magnitude values in the case of different angles of view. Fig. 20D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 10, which represents a deviation of different image heights on the imaging plane after light passes through the lens group. As can be seen from fig. 20A to 20D, the image pickup lens group according to embodiment 10 can achieve good imaging quality.
Example 11
An image pickup lens group according to embodiment 11 of the present application is described below with reference to fig. 21 to 22D. Fig. 21 shows a schematic configuration diagram of an image pickup lens group according to embodiment 11 of the present application.
As shown in fig. 21, the image pickup lens group according to the exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave; the second lens element E2 has negative 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 negative refractive power, wherein an object-side surface S5 thereof is concave, 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 concave; the fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex; the sixth lens element E6 with positive refractive power has a concave object-side surface S11 and a convex image-side surface S12; the seventh lens element E7 with negative refractive power has a concave object-side surface S13 and a convex image-side surface S14; the eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Optionally, the image pickup lens group in the present embodiment further includes a stop STO disposed between the second lens E2 and the third lens E3.
Table 31 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the imaging lens group of example 11, in which the units of the radii of curvature and the thicknesses are millimeters (mm). Table 32 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 11, where each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 33 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 11, a total effective focal length f of the imaging lens group, an optical total length TTL of the imaging lens group, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle FOV of the imaging lens group.
Figure BDA0001464220080000351
Table 31
Figure BDA0001464220080000352
Figure BDA0001464220080000361
Table 32
f1(mm) 4.28 f7(mm) -53.21
f2(mm) -15.93 f8(mm) -2.24
f3(mm) -100.02 f(mm) 4.61
f4(mm) 72.04 TTL(mm) 5.50
f5(mm) 21.40 ImgH(mm) 3.77
f6(mm) 3.44 FOV(°) 77.8
Table 33
Fig. 22A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 11, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens group. Fig. 22B shows an astigmatism curve of the imaging lens group of embodiment 11, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 22C shows a distortion curve of the image pickup lens group of embodiment 11, which represents distortion magnitude values in the case of different angles of view. Fig. 22D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 11, which represents a deviation of different image heights on the imaging plane after light passes through the lens group. As can be seen from fig. 22A to 22D, the image pickup lens group given in embodiment 11 can achieve good imaging quality.
Example 12
An image pickup lens group according to embodiment 12 of the present application is described below with reference to fig. 23 to 24D. Fig. 23 shows a schematic configuration diagram of an image pickup lens group according to embodiment 12 of the present application.
As shown in fig. 23, the image pickup lens group according to the exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave; the second lens element E2 has negative 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 concave, and an image-side surface S6 thereof is convex; the fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave; the fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex; the sixth lens element E6 with positive refractive power has a concave object-side surface S11 and a convex image-side surface S12; the seventh lens element E7 with negative refractive power has a concave object-side surface S13 and a convex image-side surface S14; the eighth lens element E8 has negative refractive power, wherein an object-side surface S15 thereof is concave and an image-side surface S16 thereof is convex. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Optionally, the image pickup lens group in the present embodiment further includes a stop STO disposed between the second lens E2 and the third lens E3.
Table 34 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the imaging lens group of example 12, in which the units of the radii of curvature and the thicknesses are millimeters (mm). Table 35 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 12, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 36 shows effective focal lengths f1 to f8 of the respective lenses in embodiment 12, a total effective focal length f of the imaging lens group, an optical total length TTL of the imaging lens group, a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17, and a maximum half field angle FOV of the imaging lens group.
Figure BDA0001464220080000371
Figure BDA0001464220080000381
Watch 34
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 2.1900E-05 5.7036E-03 -1.2398E-02 1.5688E-02 -1.2846E-02 6.6033E-03 -2.0723E-03 3.5456E-04 -2.4609E-05
S2 2.5736E-02 -7.1904E-02 1.0461E-01 -1.0083E-01 6.4824E-02 -2.7428E-02 7.3099E-03 -1.1020E-03 7.0935E-05
S3 4.0233E-03 -1.2999E-01 1.8248E-01 -1.6610E-01 1.9993E-01 -2.8472E-01 2.6926E-01 -1.3372E-01 2.6276E-02
S4 2.6648E-03 -1.7368E-01 8.2638E-01 -3.3442E+00 9.0883E+00 -1.5060E+01 1.4692E+01 -7.6935E+00 1.6575E+00
S5 4.4922E-02 -1.5435E-01 3.0077E-01 -5.4617E-01 5.8684E-01 -1.4562E-01 -2.7819E-01 2.4572E-01 -5.9804E-02
S6 1.0266E-01 -4.6409E-01 1.4415E+00 -4.4743E+00 1.0865E+01 -1.7491E+01 1.7242E+01 -9.3676E+00 2.1300E+00
S7 6.3688E-02 -3.3433E-01 6.2083E-01 -9.1508E-01 1.0361E+00 -7.4968E-01 3.1776E-01 -7.1996E-02 6.7473E-03
S8 1.2637E-01 -4.1427E-01 7.2566E-01 -9.4070E-01 8.3794E-01 -4.7016E-01 1.5690E-01 -2.8393E-02 2.1441E-03
S9 -4.8798E-03 -1.0123E-02 7.5315E-02 -1.0076E-01 5.8658E-02 -1.4800E-02 3.1034E-04 5.2318E-04 -6.7874E-05
S10 -4.2233E-02 -1.0273E-05 2.7655E-02 -4.7199E-02 7.7800E-02 -7.7481E-02 4.0514E-02 -1.0408E-02 1.0405E-03
S11 1.9879E-02 -6.0799E-02 1.0027E-01 -1.2833E-01 9.8888E-02 -4.4876E-02 1.1882E-02 -1.6992E-03 1.0112E-04
S12 1.7212E-02 -3.2340E-02 5.5607E-02 -7.0610E-02 4.7653E-02 -1.7275E-02 3.4152E-03 -3.4633E-04 1.4010E-05
S13 -2.9266E-02 1.2706E-01 -1.3414E-01 6.9423E-02 -2.3344E-02 5.5824E-03 -8.9720E-04 8.3471E-05 -3.3101E-06
S14 -9.9691E-02 2.4593E-01 -2.2328E-01 1.1228E-01 -3.5013E-02 6.9231E-03 -8.4933E-04 5.9929E-05 -1.9041E-06
S15 -3.3555E-02 1.2156E-01 -1.4417E-01 9.4123E-02 -3.6292E-02 8.5065E-03 -1.1938E-03 9.2560E-05 -3.0614E-06
S16 3.7267E-02 -4.5457E-02 2.0142E-02 -5.2170E-03 8.6805E-04 -9.4588E-05 6.5274E-06 -2.5651E-07 4.3018E-09
Table 35
f1(mm) 4.62 f7(mm) -20.03
f2(mm) -7.96 f8(mm) -3.07
f3(mm) 20.76 f(mm) 4.35
f4(mm) -20.93 TTL(mm) 5.50
f5(mm) 7.42 ImgH(mm) 3.88
f6(mm) 5.10 FOV(°) 81.6
Table 36
Fig. 24A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 12, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens group. Fig. 24B shows an astigmatism curve of the imaging lens group of embodiment 12, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 24C shows a distortion curve of the image pickup lens group of embodiment 12, which represents distortion magnitude values in the case of different angles of view. Fig. 24D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 12, which represents a deviation of different image heights on the imaging plane after light passes through the lens group. As can be seen from fig. 24A to 24D, the image pickup lens group provided in embodiment 12 can achieve good imaging quality.
In summary, examples 1 to 12 each satisfy the relationship shown in table 37 below.
Figure BDA0001464220080000391
Table 37
The present application also provides an image pickup apparatus, in which the electron photosensitive element may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The image pickup apparatus may be a stand-alone image pickup device such as a digital camera, or may be an image pickup module integrated on a mobile electronic device such as a cellular phone, a tablet computer, or the like. The imaging device is equipped with the above-described image pickup lens group.
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 it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the invention. 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 (21)

1. The imaging lens assembly includes, in order from an object side to an image side along an optical axis:
The first lens with positive focal power has a convex object side surface and a concave image side surface;
a second lens having optical power;
a third lens having optical power;
a fourth lens having optical power;
a fifth lens having optical power;
a sixth lens with positive focal power, the object side surface of which is a concave surface;
a seventh lens having optical power;
an eighth lens with negative focal power, the object side surface of which is a concave surface;
wherein the number of lenses of the image pickup lens group having optical power is eight,
the total effective focal length f of the image pickup lens group and the entrance pupil diameter EPD of the image pickup lens group satisfy f/EPD less than or equal to 2.0,
the total optical length TTL of the image pickup lens group and half of the diagonal length ImgH of the effective pixel area on the imaging surface of the image pickup lens group satisfy TTL/ImgH less than or equal to 1.6, and
the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy the conditions of 2 < CT1/CT2 < 6.
2. The imaging lens group according to claim 1, wherein a full field angle FOV of the imaging lens group satisfies 75 ° < FOV < 85 °.
3. The imaging lens set according to claim 1, further comprising a diaphragm disposed between the second lens and the third lens.
4. A camera lens group according to any one of claims 1 to 3, wherein the effective focal length f2 of the second lens satisfies-10 < f2/f < 25.
5. A camera lens group according to any one of claims 1 to 3, wherein the effective focal length f4 of the fourth lens satisfies-45 < f4/f < 25.
6. A camera lens group according to any one of claims 1 to 3, wherein the effective focal length f7 of the seventh lens satisfies-30 < f7/f < 50.
7. The image pickup lens group according to any one of claims 1 to 3, wherein a radius of curvature R11 of an object side surface of the sixth lens and a radius of curvature R12 of an image side surface of the sixth lens satisfy 4 < R11/R12 < 10.
8. A photographic lens group according to claim 2 or 3, characterized in that 0.5 < (TTL/ImgH)/(f/EPD) +.1.5 is satisfied.
9. A camera lens group according to any one of claims 1 to 3, wherein the effective focal length f7 of the seventh lens and the effective focal length f8 of the eighth lens satisfy-65 < f7/f8 < 45.
10. A camera lens group according to any one of claims 1 to 3, wherein the effective focal length f7 of the seventh lens and the radius of curvature R6 of the image side of the third lens satisfy-25 < f7/R6 < 20.
11. The imaging lens assembly includes, in order from an object side to an image side along an optical axis:
the first lens with positive focal power has a convex object side surface and a concave image side surface;
a second lens having optical power;
a third lens having optical power;
a fourth lens having optical power;
a fifth lens having optical power;
a sixth lens with positive focal power, the object side surface of which is a concave surface;
a seventh lens having optical power;
an eighth lens with negative focal power, the object side surface of which is a concave surface;
wherein the number of lenses of the image pickup lens group having optical power is eight,
the center thickness CT1 of the first lens and the center thickness CT2 of the second lens satisfy the conditions of 2 < CT1/CT2 < 6, and
the total optical length TTL of the image pickup lens group and half of the diagonal line length ImgH of an effective pixel area on an imaging surface of the image pickup lens group meet the condition that TTL/ImgH is less than or equal to 1.6.
12. The imaging lens assembly of claim 11, wherein an effective focal length f2 of said second lens and a total effective focal length f of said imaging lens assembly satisfy-10 < f2/f < 25.
13. The imaging lens assembly of claim 11, wherein an effective focal length f4 of said fourth lens and a total effective focal length f of said imaging lens assembly satisfy-45 < f4/f < 25.
14. The imaging lens set according to claim 11, wherein an effective focal length f7 of the seventh lens and a total effective focal length f of the imaging lens set satisfy-30 < f7/f < 50.
15. The imaging lens system according to claim 11, wherein an effective focal length f7 of the seventh lens and an effective focal length f8 of the eighth lens satisfy-65 < f7/f8 < 45.
16. The imaging lens system according to claim 11, wherein an effective focal length f7 of said seventh lens element and a radius of curvature R6 of an image side surface of said third lens element satisfy-25 < f7/R6 < 20.
17. The image capturing lens assembly of claim 11, wherein a radius of curvature R11 of an object side of the sixth lens and a radius of curvature R12 of an image side of the sixth lens satisfy 4 < R11/R12 < 10.
18. The imaging lens group according to any one of claims 11 to 17, wherein a full field angle FOV of the imaging lens group satisfies 75 ° < FOV < 85 °.
19. The imaging lens set according to any one of claims 11 to 17, further comprising a stop disposed between the second lens and the third lens.
20. The image pickup lens group according to any one of claims 11 to 17, wherein 0.5 < (TTL/ImgH)/(f/EPD) +.1.5 is satisfied,
wherein TTL is an optical total length of the image capturing lens assembly, imgH is a half of a diagonal length of an effective pixel region on an imaging surface of the image capturing lens assembly, f is a total effective focal length of the image capturing lens assembly, and EPD is an entrance pupil diameter of the image capturing lens assembly.
21. The imaging lens assembly of claim 20, wherein f/EPD is 2.0 or less.
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