CN211348830U - Optical imaging lens group - Google Patents

Optical imaging lens group Download PDF

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CN211348830U
CN211348830U CN201922345397.9U CN201922345397U CN211348830U CN 211348830 U CN211348830 U CN 211348830U CN 201922345397 U CN201922345397 U CN 201922345397U CN 211348830 U CN211348830 U CN 211348830U
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lens
optical imaging
lens group
image
imaging lens
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周楹
刘子维
陈念
徐武超
张凯元
戴付建
赵烈烽
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Abstract

The application discloses an optical imaging lens assembly, which comprises, in order from an object side to an image side along an optical axis: a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power, wherein: at least one mirror surface of the object side surface of the first lens to the image side surface of the seventh lens is a non-rotationally symmetric aspheric surface; the optical imaging lens group has a first direction and a second direction perpendicular to each other on a plane perpendicular to the optical axis, a part of optical parameters in the first direction being different from the part of optical parameters in the second direction; and in the first direction, one half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group satisfies: ImgH > 5 mm.

Description

Optical imaging lens group
Technical Field
The application relates to the field of optical elements, in particular to an optical imaging lens group.
Background
The imaging quality of the lens of the portable electronic product such as the mobile phone, the size of the image plane and the like are important indexes for measuring the performance of the portable electronic product such as the mobile phone.
Currently, the rear camera of many mobile phones is generally configured for three shots: a main camera lens, a wide-angle lens and a telephoto lens. Under the cooperation of the three cameras, the ultra-clear shooting function can be realized by combining a later-stage image processing algorithm. However, due to the large field of view of the wide-angle lens, the distortion of the external field of view of a general wide-angle lens is usually large, and the peripheral field of view is usually about 25%, which provides difficulty for later algorithm correction. In fact, the problem of peripheral field distortion of not only wide-angle lenses but also other lenses is widely existed.
At present, most lenses of portable electronic products such as mobile phones have rotationally symmetrical spherical surfaces. Such a mirror surface has a high degree of freedom in the meridian plane, and can correct axial aberrations, but cannot correct off-axis aberrations, thereby limiting further improvement in image quality.
SUMMERY OF THE UTILITY MODEL
An aspect of the present application provides an optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprising: the lens comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens.
In one embodiment, at least one mirror surface of the object side surface of the first lens to the image side surface of the seventh lens is a non-rotationally symmetric aspheric surface.
In one embodiment, the optical imaging lens group has a first direction and a second direction perpendicular to each other on a plane perpendicular to the optical axis, and a part of optical parameters in the first direction is different from a part of optical parameters in the second direction.
In one embodiment, in the first direction, ImgH, which is half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group, may satisfy: ImgH > 5 mm.
In one embodiment, in the first direction, half of a Semi-FOV of a maximum field angle of the optical imaging lens group may satisfy: Semi-FOV > 50.
In one embodiment, in the first direction, a distance TTL between an object side surface of the first lens and an imaging surface of the optical imaging lens group on an optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens group may satisfy: TTL/ImgH is less than 1.6.
In one embodiment, the effective focal length fy of the first direction and the effective focal length f3 of the third lens satisfy: 0.5 < fy/f3 < 1.5.
In one embodiment, the effective focal length fx of the second direction and the effective focal length f7 of the seventh lens may satisfy: -1.5 < f7/fx < -0.5.
In one embodiment, in the first direction, the central thickness CT3 of the third lens on the optical axis and the edge thickness ET3 of the third lens may satisfy: 0.3 < ET3/CT3 < 0.8.
In one embodiment, in the first direction, the central thickness CT7 of the seventh lens on the optical axis and the edge thickness ET7 of the seventh lens may satisfy: 0.3 < CT7/ET7 < 0.8.
In one embodiment, in the first direction, a distance SAG61 on the optical axis from an intersection point of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of the object-side surface of the sixth lens to a distance SAG62 on the optical axis from an intersection point of an image-side surface of the sixth lens and the optical axis to an effective radius vertex of the image-side surface of the sixth lens may satisfy: 0.2 < SAG61/SAG62 < 0.7.
In one embodiment, the effective focal length f2 of the second lens, the effective focal length f4 of the fourth lens, and the effective focal length f6 of the sixth lens may satisfy: 0.2 < (f6-f4)/f2 < 1.0.
In one embodiment, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R2 of the image-side surface of the first lens, and the effective focal length f1 of the first lens may satisfy: 0.1 < (R2-R1)/f1 < 0.6.
In one embodiment, in the first direction, a radius of curvature R3 of the object-side surface of the second lens, a radius of curvature R4 of the image-side surface of the second lens, a radius of curvature R13 of the object-side surface of the seventh lens, and a radius of curvature R14 of the image-side surface of the seventh lens may satisfy: 0.2 < (R13+ R14)/(R3+ R4) < 0.7.
In one embodiment, in the first direction, a radius of curvature R6 of an image-side surface of the third lens, a radius of curvature R11 of an object-side surface of the sixth lens, and a radius of curvature R12 of the image-side surface of the sixth lens may satisfy: 0.2 < R6/(R11+ R12) < 0.7.
In one embodiment, in the first direction, the central thickness CT1 of the first lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis may satisfy: 0.4 < CT4/CT1 < 1.0.
In one embodiment, in the first direction, a center thickness CT2 of the second lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, and a center thickness CT6 of the sixth lens on the optical axis may satisfy: 0.5 < (CT2+ CT5)/CT6 < 1.0.
In one embodiment, the first lens has a negative optical power and its image-side surface is convex.
In one embodiment, the sixth lens element has a positive optical power and has a concave object-side surface and a convex image-side surface.
In one embodiment, the seventh lens element has a negative optical power, and the object side surface is convex and the image side surface is concave.
With the above configuration, the optical imaging lens group according to the present application can have at least one advantageous effect of a large image plane, ultra-thin, free-form surface, high imaging quality, and the like. For example, the free-form surface is a non-rotationally symmetrical spherical surface, has high degrees of freedom in both a meridian plane and a sagittal plane, and can maximally correct off-axis and on-axis aberrations, thereby improving the imaging quality of lenses of portable electronic products such as mobile phones. And, the free-form surface can make the distortion of the whole field of view of the lens less. In addition, the free-form surface has more design freedom than a common aspheric surface, thereby providing more space for design. The large image surface means higher resolution for the optical imaging lens group of portable electronic products such as mobile phones.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 shows a schematic structural view of an optical imaging lens group according to embodiment 1 of the present application;
fig. 2 schematically illustrates a case where the RMS spot diameter of the optical imaging lens group of embodiment 1 is within the first quadrant;
fig. 3 shows a schematic structural view of an optical imaging lens group according to embodiment 2 of the present application;
fig. 4 schematically illustrates a case where the RMS spot diameter of the optical imaging lens group of embodiment 2 is within the first quadrant;
fig. 5 is a schematic view showing a structure of an optical imaging lens group according to embodiment 3 of the present application;
fig. 6 schematically illustrates a case where the RMS spot diameter of the optical imaging lens group of embodiment 3 is within the first quadrant;
fig. 7 is a schematic view showing a structure of an optical imaging lens group according to embodiment 4 of the present application;
fig. 8 schematically illustrates a case where the RMS spot diameter of the optical imaging lens group of embodiment 4 is within the first quadrant;
fig. 9 is a schematic view showing a structure of an optical imaging lens group according to embodiment 5 of the present application;
fig. 10 schematically illustrates a case where the RMS spot diameter of the optical imaging lens group of embodiment 5 is within the first quadrant;
fig. 11 is a schematic view showing a structure of an optical imaging lens group according to embodiment 6 of the present application;
fig. 12 schematically illustrates a case where the RMS spot diameter of the optical imaging lens group of embodiment 6 is within the first quadrant;
fig. 13 is a schematic view showing a structure of an optical imaging lens group according to embodiment 7 of the present application;
fig. 14 schematically illustrates a case where the RMS spot diameter of the optical imaging lens group of embodiment 7 is within the first quadrant;
fig. 15 is a schematic view showing a structure of an optical imaging lens group according to embodiment 8 of the present application;
fig. 16 schematically illustrates a case where the RMS spot diameter of the optical imaging lens group of embodiment 8 is in the first quadrant;
fig. 17 is a schematic view showing a structure of an optical imaging lens group according to embodiment 9 of the present application;
fig. 18 schematically shows a case where the RMS spot diameter of the optical imaging lens group of embodiment 9 is in the first quadrant.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In a specific embodiment, the first direction may also be referred to as a Y-axis direction, and the second direction may also be referred to as an X-axis direction.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The features, principles, and other aspects of the present application are described in detail below.
The optical imaging lens group according to an exemplary embodiment of the present application may include seven lenses having optical power, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, respectively. The seven lenses are arranged along the optical axis in sequence from the object side to the image side. Any adjacent two lenses of the first lens to the seventh lens may have a spacing distance therebetween.
In an exemplary embodiment, at least one mirror surface of the object side surface of the first lens to the image side surface of the seventh lens is a non-rotationally symmetric aspheric surface. The application of the free-form surface ensures that the distortion of the whole field of view of the optical imaging lens group is smaller; in addition, the free-form surface has more design freedom degrees compared with the common aspheric surface, and provides a larger space for design.
In an exemplary embodiment, the optical imaging lens group has an X-axis direction and a Y-axis direction perpendicular to each other on a plane perpendicular to the optical axis, and a part of optical parameters in the Y-axis direction is different from a part of optical parameters in the X-axis direction.
In an exemplary embodiment, the first lens may have a negative optical power, and the image side surface thereof may be convex.
In an exemplary embodiment, the sixth lens element may have a positive optical power, and the object-side surface thereof may be concave and the image-side surface thereof may be convex.
In an exemplary embodiment, the seventh lens element may have a negative optical power, and the object-side surface thereof may be convex and the image-side surface thereof may be concave.
Through rational distribution face type and focal power, can effectively reduce the tolerance sensitivity of system to can guarantee the rationality of formation of image lens group lens structure, thereby can realize surpassing clearly the function of shooing.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: ImgH > 5mm, wherein ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group in the Y-axis direction. More specifically, ImgH further satisfies: ImgH > 5.3 mm. The requirement that ImgH is larger than 5mm is met, and the realization of an ultra-large image surface of the photographic lens structure is facilitated.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: the Semi-FOV is more than 50 degrees, wherein the Semi-FOV is half of the maximum field angle of the optical imaging lens group in the Y-axis direction. More specifically, the Semi-FOV further satisfies: Semi-FOV > 55 deg. The Semi-FOV is more than 50 degrees, the system can be ensured to have a large field angle, and the ultra-wide-angle shooting function is facilitated.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: TTL/ImgH < 1.6, wherein, TTL is the distance between the object side surface of the first lens and the imaging surface of the optical imaging lens group in the Y-axis direction, and ImgH is half of the length of the diagonal line of the effective pixel area on the imaging surface of the optical imaging lens group in the Y-axis direction. More specifically, TTL and ImgH may further satisfy: TTL/ImgH is less than 1.5. The requirements that TTL/ImgH is less than 1.6 are met, the ultra-large image plane and the ultra-thinness of the photographic lens structure are facilitated to be realized, the ultra-large image plane of the lens is ensured, and the total length of a system can be shortened to realize the ultra-thin structure of the lens.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.5 < fy/f3 < 1.5, where fy is the effective focal length in the Y-axis direction and f3 is the effective focal length of the third lens. More specifically, fy and f3 further satisfy: fy/f3 is more than 0.8 and less than 1.2. The requirement that fy/f3 is more than 0.5 and less than 1.5 is met, the convergence of light on the object side surface at the third lens is facilitated, the aperture of the third lens is reduced, and therefore the ultra-thinning can be achieved while the structure of the photographic lens is guaranteed to have an ultra-large image surface.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: -1.5 < f7/fx < -0.5, wherein fx is the effective focal length in the X-axis direction and f7 is the effective focal length of the seventh lens. More specifically, f7 and fx further satisfy: -1.2 < f7/fx < -0.7. Satisfy-1.5 < f7/fx < -0.5, be favorable to the light of object side face to assemble at seventh lens, reduce the aperture of seventh lens to be favorable to guaranteeing that photographic lens's structure has the super large image plane, can realize the ultra-thinization.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.3 < ET3/CT3 < 0.8, wherein CT3 is the central thickness of the third lens in the Y-axis direction on the optical axis, and ET3 is the edge thickness of the third lens in the Y-axis direction. More specifically, ET3 and CT3 further satisfy: 0.4 < ET3/CT3 < 0.6. The condition of 0.3 < ET3/CT3 < 0.8 is satisfied, which is beneficial to the processing and molding of the lens.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.3 < CT7/ET7 < 0.8, wherein CT7 is the central thickness of the seventh lens in the Y-axis direction on the optical axis, ET7 is the edge thickness ET7 of the seventh lens in the Y-axis direction. More specifically, CT7 and ET7 further satisfy: 0.4 < CT7/ET7 < 0.6. The requirement of 0.3 < CT7/ET7 < 0.8 is satisfied, which is beneficial to the processing and molding of the lens.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.2 < SAG61/SAG62 < 0.7, wherein SAG61 is a distance on the optical axis from the intersection point of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens in the Y-axis direction, and SAG62 is a distance on the optical axis from the intersection point of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens in the Y-axis direction. More specifically, SAG61 and SAG62 further may satisfy: 0.4 < SAG61/SAG62 < 0.6. The requirements of 0.2 < SAG61/SAG62 < 0.7 are met, and the manufacturing and forming of the sixth lens and the enlargement of the image plane are facilitated.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.2 < (f6-f4)/f2 < 1.0, wherein f2 is the effective focal length of the second lens, f4 is the effective focal length of the fourth lens, and f6 is the effective focal length of the sixth lens. More specifically, f6, f4, and f2 may further satisfy: 0.2 < (f6-f4)/f2 < 0.7. The requirement of 0.2 < (f6-f4)/f2 < 1.0 can avoid the second lens from bending too much, and is beneficial to processing and molding.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.1 < (R2-R1)/f1 < 0.6, wherein R1 is the radius of curvature of the object-side surface of the first lens, R2 is the radius of curvature of the image-side surface of the first lens, and f1 is the effective focal length of the first lens. Satisfies 0.1 < (R2-R1)/f1 < 0.6, can avoid the first lens from bending too much, and is beneficial to processing and molding.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.2 < (R13+ R14)/(R3+ R4) < 0.7, wherein R3 is a radius of curvature of an object-side surface of the second lens in the Y-axis direction, R4 is a radius of curvature of an image-side surface of the second lens in the Y-axis direction, R13 is a radius of curvature of an object-side surface of the seventh lens in the Y-axis direction, and R14 is a radius of curvature of an image-side surface of the seventh lens in the Y-axis direction. More specifically, R13, R14, R3 and R4 may further satisfy: 0.3 < (R13+ R14)/(R3+ R4) < 0.5. Satisfy 0.2 < (R13+ R14)/(R3+ R4) < 0.7, be favorable to rationally distributing the on-axis spatial position of second lens and seventh lens.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.2 < R6/(R11+ R12) < 0.7, where R6 is a radius of curvature of an image-side surface of the third lens in the Y-axis direction, R11 is a radius of curvature of an object-side surface of the sixth lens in the Y-axis direction, and R12 is a radius of curvature of an image-side surface of the sixth lens in the Y-axis direction. The requirement that R6/(R11+ R12) < 0.2 is met, the sixth lens can be prevented from being bent too much, and the processing and molding are facilitated.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.4 < CT4/CT1 < 1.0, where CT1 is the central thickness of the first lens in the Y-axis direction on the optical axis, and CT4 is the central thickness of the fourth lens in the Y-axis direction on the optical axis. More specifically, CT4 and CT1 further satisfy: 0.4 < CT4/CT1 < 0.7. The optical power of the first lens and the optical power of the fourth lens can be reasonably distributed and the aberration can be effectively corrected when the requirement that CT4/CT1 is more than 0.4 and less than 1.0 is met.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.5 < (CT2+ CT5)/CT6 < 1.0, wherein CT2 is a central thickness of the second lens in the Y-axis direction on the optical axis, CT5 is a central thickness of the fifth lens in the Y-axis direction on the optical axis, and CT6 is a central thickness of the sixth lens in the Y-axis direction on the optical axis. Satisfies 0.5 < (CT2+ CT5)/CT6 < 1.0, and is favorable for realizing the ultra-thinning of the whole lens group.
In an exemplary embodiment, an optical imaging lens group according to the present application further includes a stop disposed between the second lens and the third lens. Optionally, the optical imaging lens group may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on an imaging surface.
The application provides an optical imaging lens group with characteristics of large image surface, super wide angle, ultra-thin and the like, and an aspheric surface and a free-form surface are adopted. The optical imaging lens group according to the above-described embodiment of the present application may employ a plurality of lenses, for example, seven lenses as described above. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the optical imaging lens group can be effectively reduced, the processability of the optical imaging lens group can be improved, and the optical imaging lens group is more favorable for production and processing.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the seventh lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated in imaging can be eliminated as much as possible, and the imaging quality is further improved. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, fifth, sixth, and seventh lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses constituting the optical imaging lens group can be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although seven lenses are exemplified in the embodiment, the optical imaging lens group is not limited to include seven lenses. The optical imaging lens group may also include other numbers of lenses, if desired.
Specific examples of the optical imaging lens group applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An optical imaging lens group according to embodiment 1 of the present application is described below with reference to fig. 1 to 2. Fig. 1 shows a schematic structural diagram of an optical imaging lens group according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The object-side surface S13 and the image-side surface S14 of the seventh lens element E7 are aspheric. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 1 shows a basic parameter table of the optical imaging lens group of embodiment 1, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
Figure BDA0002333392150000081
TABLE 1
In the present example, the effective focal length fx of the optical imaging lens group in the X-axis direction is 3.66mm, the effective focal length fy of the optical imaging lens group in the Y-axis direction is 3.66mm, the total length TTL of the optical imaging lens group (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 of the optical imaging lens group) is 7.50mm, half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the optical imaging lens group is 5.35mm, half Smei-FOV of the maximum field angle of the optical imaging lens group is 55.2 °, and the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.34.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the sixth lens E6 are both rotationally symmetric aspheric surfaces, and the surface shape x of each rotationally symmetric aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
Figure BDA0002333392150000082
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S12 used in example 14、A6、A8、A10、A12、A14、A16、A18And A20。
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.4343E-01 -1.9786E-01 1.1200E-03 -2.2832E-03 -1.6714E-02 5.8298E-03 -3.5375E-03 5.0634E-04 -2.2853E-04
S2 6.7994E-01 -1.4620E-01 1.8302E-02 -3.7182E-05 2.1649E-03 -8.2373E-04 2.4523E-04 2.2816E-05 5.9392E-05
S3 -3.4481E-02 -9.7601E-03 3.9096E-03 9.7064E-04 8.6802E-05 -2.9232E-05 2.9962E-05 2.3089E-05 1.6465E-05
S4 -5.6370E-02 -7.1286E-03 -1.3388E-04 1.4112E-05 5.8646E-06 3.0731E-07 9.7718E-06 9.6183E-06 5.1629E-06
S5 -2.9447E-02 -1.5717E-03 8.5676E-04 3.4750E-04 7.1234E-05 -8.8832E-06 -1.0295E-05 -1.5820E-06 -2.7308E-07
S6 -1.3138E-01 5.4050E-03 3.6118E-03 2.4391E-03 9.4353E-04 1.7083E-04 -4.1179E-05 -6.1212E-05 -1.1650E-05
S7 -2.1239E-01 5.0477E-03 3.2841E-03 -2.9927E-03 -2.4818E-03 -1.1116E-03 -3.1669E-04 -6.9427E-05 4.9454E-06
S8 -2.1151E-01 2.8735E-03 3.3414E-04 -4.6314E-03 -2.3357E-03 -4.9497E-04 2.2137E-04 2.8088E-04 1.1827E-04
S9 -3.8004E-01 1.3226E-01 -2.9212E-02 -2.3057E-05 1.9986E-03 -1.1495E-03 -3.5912E-05 6.8461E-04 3.3207E-04
S10 -5.8636E-01 3.7613E-02 -1.8315E-02 -1.1505E-02 -2.6036E-03 3.0774E-03 2.8961E-03 1.1739E-03 2.2407E-04
S11 -3.2540E-02 -5.0452E-02 -1.2862E-02 -4.1868E-03 -2.9362E-03 -1.3180E-03 -2.4124E-04 6.2139E-05 9.5364E-05
S12 5.2942E-01 1.0051E-01 -3.2140E-03 -2.0388E-02 2.6498E-03 -3.3586E-03 -5.7362E-03 -3.2942E-03 -5.5881E-04
TABLE 2
In embodiment 1, the object-side surface S13 and the image-side surface S14 of the seventh lens element E7 are non-rotationally symmetric aspheric surfaces (i.e., AAS surfaces), and the surface type of the non-rotationally symmetric aspheric surfaces can be defined by, but is not limited to, the following non-rotationally symmetric aspheric surface formula:
Figure BDA0002333392150000091
wherein Z is a rise of a plane parallel to the Z-axis direction; c is the curvature of the vertex; k is a conic coefficient;
Figure BDA0002333392150000092
r is the radius value; ZPjIs the jth Zernike polynomial; cj+1Is ZPjThe coefficient of (a); the Zernike terms range from ZP1 to ZP66, which correspond to SCO coefficients of C2 to C67. In the AAS surface coefficients of example 1, tables 3-1 to 3-3, the numerical values of the nonzero coefficients among the higher-order Zernike coefficients C2-C67 of each non-rotationally symmetric aspherical surface are given, and the SCO coefficients not given are all 0.
AAS noodle C2 C5 C6 C12 C13 C14 C23
S13 -1.4576E+00 -3.3272E-02 -1.3373E+00 -3.8696E-02 -3.3339E-02 8.6224E-02 -4.5687E-02
S14 -1.4673E+00 6.2015E-02 -1.9336E+00 5.7246E-02 6.5770E-02 -1.7785E-01 -1.1234E-01
TABLE 3-1
AAS noodle C24 C25 C26 C38 C39 C40 C41
S13 -2.2265E-02 -2.0360E-02 2.3210E-02 -1.7251E-02 -1.4860E-02 -8.4395E-03 -7.4541E-03
S14 5.4355E-02 3.8951E-02 -8.1579E-03 -2.1761E-02 -3.5880E-02 2.4068E-02 1.2970E-02
TABLE 3-2
Figure BDA0002333392150000093
Figure BDA0002333392150000101
Tables 3 to 3
Fig. 2 shows the size of the RMS spot diameter of the optical imaging lens group of embodiment 1 at different image height positions in the first quadrant. In FIG. 2, the minimum RMS spot diameter is 0.0010914mm, the maximum RMS spot diameter is 0.02783mm, the mean RMS spot diameter is 0.0036392mm, and the standard deviation of the RMS spot diameter is 0.0026793 mm. As can be seen from fig. 2, the optical imaging lens group according to embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens group according to embodiment 2 of the present application is described below with reference to fig. 3 to 4. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic structural view of an optical imaging lens group according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The object-side surface S13 and the image-side surface S14 of the seventh lens element E7 are aspheric. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In the present example, the effective focal length fx of the optical imaging lens group in the X-axis direction is 3.59mm, the effective focal length fy of the optical imaging lens group in the Y-axis direction is 3.59mm, the total length TTL of the optical imaging lens group is 7.80mm, half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the optical imaging lens group is 5.35mm, half Smei-FOV of the maximum field angle of the optical imaging lens group is 56.2 °, and the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.34.
Table 4 shows a basic parameter table of the optical imaging lens group of embodiment 2, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 5-1 and 5-2 show the high-order coefficient A of each rotationally symmetric aspherical mirror surface that can be used in example 24、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each rotationally symmetric aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1. Tables 6-1 to 6-3 show the numerical values of non-zero coefficients among the high-order Zernike coefficients C2-C67 of the non-rotationally symmetric aspherical surfaces S13 and S14 that can be used in example 2, and the SCO coefficients that are not given are all 0. Wherein the non-rotationally symmetric aspherical surface type can be defined by the formula (2) given in the above-described embodiment 1.
Figure BDA0002333392150000111
TABLE 4
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.9384E-01 -2.3313E-01 -3.3260E-03 -8.4294E-04 -2.5185E-02 1.0643E-02 -6.8150E-03 1.6773E-03 -6.7407E-04
S2 7.2467E-01 -1.4314E-01 9.1996E-03 -1.1700E-03 2.7401E-03 -4.7760E-04 6.9881E-05 -3.4525E-05 5.4714E-05
S3 -2.8059E-02 -8.7741E-03 3.6588E-03 1.1171E-03 1.6566E-04 -2.7248E-05 4.2054E-07 5.0542E-06 5.4854E-06
S4 -5.4480E-02 -8.3250E-03 -1.0114E-03 -3.0422E-04 -1.2745E-04 -5.8573E-05 -2.4171E-05 -7.5293E-06 -2.6234E-06
S5 -2.6059E-02 -1.2243E-03 7.2673E-04 2.9396E-04 6.5222E-05 -3.7780E-06 -8.1160E-06 -2.8042E-06 -1.3682E-06
S6 -7.5007E-02 -1.9225E-03 4.7133E-03 1.9839E-03 1.0772E-03 2.4801E-04 5.3040E-05 -1.9691E-05 -1.8042E-06
S7 -1.6731E-01 -6.9987E-04 9.1150E-03 -4.9174E-04 -4.7825E-04 -5.5463E-04 -7.7170E-05 -2.8668E-05 1.5655E-05
S8 -2.3747E-01 1.3907E-02 5.5926E-03 -1.4586E-03 -1.0523E-03 -5.0799E-04 -2.4307E-05 5.4245E-06 2.6900E-05
S9 -3.9170E-01 1.1874E-01 -1.4382E-02 -3.7547E-03 4.2995E-04 3.8405E-04 -4.1451E-05 -9.7431E-07 9.1174E-06
S10 -5.7756E-01 4.1527E-02 -3.6098E-03 -5.4712E-03 -3.6775E-03 1.8457E-04 7.7269E-04 4.5056E-04 8.4911E-05
S11 -1.2426E-01 -7.4883E-02 -1.8127E-02 -7.2086E-03 -4.2543E-03 -2.4864E-03 -2.2141E-04 1.3404E-06 1.2552E-04
S12 4.1982E-01 -3.3931E-03 3.0112E-02 -1.7671E-02 4.3635E-03 -4.4607E-04 6.8178E-04 -2.5026E-04 5.0720E-05
TABLE 5-1
Figure BDA0002333392150000112
Figure BDA0002333392150000121
TABLE 5-2
AAS noodle C2 C5 C6 C12 C13 C14 C23
S13 -1.2131E+00 1.5447E-02 -1.2508E+00 1.1466E-02 1.7428E-02 1.1317E-02 -1.8523E-04
S14 -1.2729E+00 -9.3938E-03 -1.3928E+00 -1.0939E-02 -5.5875E-03 -1.1014E-01 -8.7347E-03
TABLE 6-1
AAS noodle C24 C25 C26 C38 C39 C40 C41
S13 9.5398E-03 1.3380E-02 3.8353E-02 1.6285E-04 -9.8213E-05 5.3111E-03 6.4020E-03
S14 -1.8627E-03 7.7188E-04 -2.3572E-02 2.5275E-03 -3.3822E-03 2.4586E-03 2.7481E-03
TABLE 6-2
AAS noodle C42 C57 C58 C59 C60 C61 C62
S13 7.4359E-03 -5.9119E-03 -1.2014E-03 5.1481E-04 1.4449E-03 1.3151E-03 7.5575E-04
S14 3.7153E-04 -1.3505E-02 -2.2916E-04 8.9462E-04 1.4233E-03 8.6436E-04 3.6656E-03
Tables 6 to 3
Fig. 4 shows the size of the RMS spot diameter of the optical imaging lens group of embodiment 2 at different image height positions in the first quadrant. In FIG. 4, the minimum RMS spot diameter is 0.00067433mm, the maximum RMS spot diameter is 0.020447mm, the mean RMS spot diameter is 0.0024699mm, and the standard deviation of the RMS spot diameter is 0.0020876 mm. As can be seen from fig. 4, the optical imaging lens group according to embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens group according to embodiment 3 of the present application is described below with reference to fig. 5 to 6. Fig. 5 shows a schematic structural view of an optical imaging lens group according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The object-side surface S13 and the image-side surface S14 of the seventh lens element E7 are aspheric. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In the present example, the effective focal length fx of the optical imaging lens group in the X-axis direction is 3.68mm, the effective focal length fy of the optical imaging lens group in the Y-axis direction is 3.68mm, the total length TTL of the optical imaging lens group is 7.79mm, half ImgH of the diagonal length of the effective pixel region on the imaging surface S17 of the optical imaging lens group is 5.35mm, half Smei-FOV of the maximum field angle of the optical imaging lens group is 55.2 °, and the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.34.
Table 7 shows a basic parameter table of the optical imaging lens group of embodiment 3, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 8-1 and 8-2 show the high-order coefficient A of each rotationally symmetric aspherical mirror surface usable in example 34、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each rotationally symmetric aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1. Tables 9-1 to 9-3 show the numerical values of nonzero coefficients among the high-order Zernike coefficients C2-C67 of the non-rotationally symmetric aspherical surfaces S13 and S14 that can be used in example 3, and the SCO coefficients that are not given are all 0. Wherein the non-rotationally symmetric aspherical surface type can be defined by the formula (2) given in the above-described embodiment 1.
Figure BDA0002333392150000131
TABLE 7
Figure BDA0002333392150000132
Figure BDA0002333392150000141
TABLE 8-1
Flour mark A22 A24 A26 A28 A30
S1 -7.3336E-06 3.5819E-06 -1.6273E-06 6.5637E-07 -1.9069E-07
S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S8 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S9 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S11 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S12 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
TABLE 8-2
AAS noodle C2 C5 C6 C12 C13 C14 C23
S13 -1.3784E+00 -1.8607E-02 -1.2910E+00 -2.8358E-02 -1.9248E-02 6.4666E-02 -2.3082E-02
S14 -1.1709E+00 1.5400E-02 -1.4762E+00 -1.2147E-02 1.4436E-02 -1.0235E-01 -2.4185E-02
TABLE 9-1
AAS noodle C24 C25 C26 C38 C39 C40 C41
S13 -1.7139E-02 -1.1964E-02 2.2452E-02 -1.1310E-02 -8.5611E-03 -5.9593E-03 -4.5499E-03
S14 -7.7043E-03 7.5250E-03 -1.9561E-02 -1.3370E-02 -6.7667E-03 -2.3191E-03 2.0517E-03
TABLE 9-2
AAS noodle C42 C57 C58 C59 C60 C61 C62
S13 -2.7286E-03 -6.7729E-03 -2.8161E-03 -1.2483E-03 -1.0173E-03 -8.7899E-04 -1.9606E-03
S14 8.5246E-03 -2.2375E-02 -2.8338E-03 5.8701E-04 -2.8033E-04 1.5095E-04 3.2969E-03
Tables 9 to 3
Fig. 6 shows the size of the RMS spot diameter at different image height positions in the first quadrant for the optical imaging lens group of embodiment 3. In FIG. 6, the minimum RMS spot diameter is 0.00078564mm, the maximum RMS spot diameter is 0.0081965mm, the mean RMS spot diameter is 0.0026705mm, and the standard deviation of the RMS spot diameter is 0.0011167 mm. As can be seen from fig. 6, the optical imaging lens group provided in embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens group according to embodiment 4 of the present application is described below with reference to fig. 7 to 8. Fig. 7 shows a schematic structural diagram of an optical imaging lens group according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The object-side surface S13 and the image-side surface S14 of the seventh lens element E7 are aspheric. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In the present example, the effective focal length fx of the optical imaging lens group in the X-axis direction is 3.57mm, the effective focal length fy of the optical imaging lens group in the Y-axis direction is 3.57mm, the total length TTL of the optical imaging lens group is 7.80mm, half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the optical imaging lens group is 5.35mm, half Smei-FOV of the maximum field angle of the optical imaging lens group is 56.1 °, and the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.34.
Table 10 shows a basic parameter table of the optical imaging lens group of embodiment 4, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 11-1 and 11-2 show the coefficients A of the higher-order terms which can be used for each rotationally symmetric aspherical mirror surface in example 44、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each rotationally symmetric aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1. Tables 12-1 to 12-3 show the numerical values of nonzero coefficients among the high-order Zernike coefficients C2 to C67, which are useful for the non-rotationally symmetric aspherical surfaces S13 and S14 in example 4, and the SCO coefficients not given are all 0. Wherein the non-rotationally symmetric aspherical surface type can be defined by the formula (2) given in the above-described embodiment 1.
Figure BDA0002333392150000151
Figure BDA0002333392150000161
Watch 10
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.6885E-01 -2.1713E-01 -2.1387E-02 4.4639E-03 -2.7875E-02 1.0825E-02 -7.0060E-03 1.4833E-03 -5.6673E-04
S2 7.6953E-01 -1.6616E-01 2.6416E-02 -2.4581E-03 2.5612E-03 -6.0132E-04 3.8514E-04 -3.1405E-05 4.3499E-05
S3 -3.1243E-02 -7.6015E-03 4.2909E-03 7.6399E-04 5.8058E-05 -5.0827E-05 -7.5332E-06 -5.9719E-06 -1.1697E-06
S4 -4.7140E-02 -5.8495E-03 -2.8361E-04 -6.7583E-06 4.6707E-05 3.1682E-05 2.1962E-05 9.1735E-06 2.0308E-06
S5 -1.1014E-02 -3.2812E-04 2.1663E-04 5.6749E-05 1.2249E-05 -2.3714E-06 6.3281E-07 -1.7613E-06 -1.1678E-06
S6 -9.2965E-02 2.4879E-03 6.0245E-04 7.2288E-04 2.7172E-04 8.8699E-05 4.2249E-05 1.2624E-05 6.4777E-06
S7 -1.8961E-01 9.8939E-03 9.2713E-03 7.6193E-04 -2.0013E-04 -3.1840E-04 7.6146E-05 4.9802E-05 2.5412E-05
S8 -1.1484E-01 9.3998E-03 1.5088E-02 -2.5720E-03 3.3862E-04 -8.0949E-04 2.6117E-04 6.0281E-06 6.2468E-05
S9 -3.5950E-01 1.0818E-01 -1.0568E-02 -1.6806E-03 2.3238E-03 -9.3053E-04 -1.9664E-04 6.8344E-05 8.3256E-05
S10 -5.7772E-01 4.9643E-02 -1.0555E-02 -5.0989E-03 -9.9216E-04 1.5354E-03 6.5313E-04 1.4965E-04 -5.8757E-05
S11 -1.3846E-01 -3.8016E-02 -1.3290E-03 3.4564E-03 -3.7984E-04 -7.3296E-04 -1.2320E-04 -2.8225E-05 4.9168E-05
S12 4.5111E-01 -1.9139E-02 4.7953E-02 -1.4432E-02 6.6988E-03 -2.1554E-03 4.2210E-04 -2.9262E-04 2.4387E-04
TABLE 11-1
Flour mark A22 A24 A26 A28 A30
S1 -2.9185E-05 1.5916E-05 -8.3920E-06 4.1561E-06 -1.5560E-06
S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S8 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S9 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S11 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S12 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
TABLE 11-2
AAS noodle C2 C5 C6 C12 C13 C14 C23
S13 -1.1875E+00 1.1703E-02 -1.1999E+00 2.5690E-03 1.3990E-02 3.6463E-02 -2.1202E-03
S14 -1.4369E+00 -2.2496E-02 -1.5755E+00 -4.3409E-02 -1.0697E-02 -1.0894E-01 -2.5667E-02
TABLE 12-1
Figure BDA0002333392150000162
Figure BDA0002333392150000171
TABLE 12-2
AAS noodle C42 C57 C58 C59 C60 C61 C62
S13 4.2288E-03 -5.2543E-03 -1.5551E-03 5.2083E-04 1.5421E-03 1.4317E-03 1.8680E-03
S14 9.2202E-03 -2.1164E-02 -2.8075E-03 2.7088E-03 2.2970E-03 2.1136E-03 6.0940E-03
Tables 12 to 3
Fig. 8 shows the size of the RMS spot diameter at different image height positions in the first quadrant for the optical imaging lens group of example 4. In FIG. 8, the minimum RMS spot diameter is 0.00079631mm, the maximum RMS spot diameter is 0.015739mm, the mean RMS spot diameter is 0.0029288mm, and the standard deviation of the RMS spot diameter is 0.0018128 mm. As can be seen from fig. 8, the optical imaging lens group according to embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens group according to embodiment 5 of the present application is described below with reference to fig. 9 to 10. Fig. 9 shows a schematic structural view of an optical imaging lens group according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The object-side surface S13 and the image-side surface S14 of the seventh lens element E7 are aspheric. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In the present example, the effective focal length fx of the optical imaging lens group in the X-axis direction is 3.57mm, the effective focal length fy of the optical imaging lens group in the Y-axis direction is 3.57mm, the total length TTL of the optical imaging lens group is 7.80mm, half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the optical imaging lens group is 5.35mm, half Smei-FOV of the maximum field angle of the optical imaging lens group is 56.1 °, and the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.34.
Table 13 shows a basic parameter table of the optical imaging lens group of example 5, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 14-1 and 14-2 show the high-order coefficient A of each rotationally symmetric aspherical mirror surface usable in example 54、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each rotationally symmetric aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1. Tables 15-1 to 15-3 show the numerical values of nonzero coefficients among the high-order Zernike coefficients C2 to C67 of the non-rotationally symmetric aspherical surfaces S13 and S14 that can be used in example 5, and the SCO coefficients that are not given are all 0. Wherein the non-rotationally symmetrical aspherical surface shape can be obtained as given in example 1 aboveAnd (2) defining.
Figure BDA0002333392150000181
Watch 13
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -3.3062E-01 -1.7415E-01 -9.9542E-02 6.1603E-02 -5.7210E-02 1.9748E-02 -7.9819E-03 5.0654E-04 3.2047E-04
S2 7.8387E-01 -1.8421E-01 2.7822E-02 2.4577E-03 2.5920E-03 -6.8192E-04 5.4865E-04 1.2897E-04 2.5492E-05
S3 -3.7967E-02 -1.0047E-02 3.7231E-03 8.4455E-04 1.9449E-05 -5.7232E-05 -6.4036E-06 -1.9354E-06 2.7439E-07
S4 -5.2414E-02 -7.3119E-03 -5.8721E-04 -1.8472E-04 -7.9076E-05 -3.5049E-05 -1.0482E-05 -3.1028E-06 -1.8150E-06
S5 -1.7389E-02 -8.2867E-04 6.3475E-04 2.1067E-04 3.4437E-05 -6.5161E-06 -2.5771E-06 -1.2101E-06 -2.6365E-06
S6 -7.5246E-02 -7.6301E-04 2.2660E-03 1.1830E-03 5.5394E-04 1.2954E-04 3.0924E-05 -1.4741E-05 -8.4531E-07
S7 -2.1495E-01 -8.7848E-05 6.4631E-03 2.2809E-04 -5.2573E-04 -4.9966E-04 -9.3472E-05 -2.6693E-05 1.1616E-05
S8 -2.1283E-01 2.2426E-02 8.5752E-03 -7.0625E-04 -4.7492E-04 -4.8521E-04 5.6948E-05 2.4526E-05 4.9952E-05
S9 -3.1287E-01 1.2123E-01 -8.1983E-03 -4.2334E-03 1.7919E-03 -4.0266E-04 -2.7031E-04 4.1281E-05 9.7215E-05
S10 -6.2704E-01 3.6920E-02 1.3882E-03 -8.0192E-03 -3.9680E-03 3.7339E-04 1.3865E-03 6.9835E-04 1.6931E-04
S11 -8.0329E-02 -6.9387E-02 6.3746E-03 -4.1334E-03 -3.9441E-03 -2.3142E-03 -2.1442E-04 -1.1944E-05 1.2762E-04
S12 4.6167E-01 2.5389E-02 2.9087E-02 -1.6225E-02 2.4306E-03 7.2798E-04 1.0320E-03 -9.4803E-05 -6.6078E-05
TABLE 14-1
Figure BDA0002333392150000182
Figure BDA0002333392150000191
TABLE 14-2
AAS noodle C2 C5 C6 C12 C13 C14 C23
S13 -1.3069E+00 -7.9724E-03 -1.2869E+00 -1.4776E-02 -7.0963E-03 4.9975E-02 -1.1842E-02
S14 -1.3466E+00 -1.6904E-02 -1.5518E+00 -2.4573E-02 -8.3997E-03 -1.0181E-01 -1.3811E-02
TABLE 15-1
AAS noodle C24 C25 C26 C38 C39 C40 C41
S13 -7.6493E-03 -2.8982E-03 3.3256E-02 -5.4240E-03 -4.4370E-03 -1.6746E-03 -2.4747E-04
S14 -9.4506E-03 1.1572E-03 -2.4665E-02 -3.5291E-04 -2.4093E-03 8.6404E-05 3.2877E-03
TABLE 15-2
AAS noodle C42 C57 C58 C59 C60 C61 C62
S13 -3.0479E-03 -5.7240E-03 -2.1124E-03 -3.0437E-04 9.2535E-06 1.3162E-04 6.2651E-04
S14 6.8525E-03 -1.7754E-02 -1.3470E-03 2.7123E-03 9.0718E-04 1.2536E-03 5.3052E-03
Tables 15-3
Fig. 10 shows the size of the RMS spot diameter at different image height positions in the first quadrant for the optical imaging lens group of example 5. In FIG. 10, the minimum RMS spot diameter is 0.00083815mm, the maximum RMS spot diameter is 0.015581mm, the mean RMS spot diameter is 0.0029757mm, and the standard deviation of the RMS spot diameter is 0.001979 mm. As can be seen from fig. 10, the optical imaging lens group according to embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens group according to embodiment 6 of the present application is described below with reference to fig. 11 to 12. Fig. 11 shows a schematic structural view of an optical imaging lens group according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The object-side surface S13 and the image-side surface S14 of the seventh lens element E7 are aspheric. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In the present example, the effective focal length fx of the optical imaging lens group in the X-axis direction is 3.55mm, the effective focal length fy of the optical imaging lens group in the Y-axis direction is 3.55mm, the total length TTL of the optical imaging lens group is 7.78mm, half ImgH of the diagonal length of the effective pixel region on the imaging surface S17 of the optical imaging lens group is 5.35mm, half Smei-FOV of the maximum field angle of the optical imaging lens group is 56.2 °, and the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.34.
Table 16 shows a basic parameter table of the optical imaging lens group of example 6, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 17-1 and 17-2 show the high-order coefficient A of each rotationally symmetric aspherical mirror surface usable in example 64、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each rotationally symmetric aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1. Tables 18-1 to 18-3 show the numerical values of nonzero coefficients among the high-order Zernike coefficients C2 to C67 of the non-rotationally symmetric aspherical surfaces S13 and S14 that can be used in example 6, and the SCO coefficients that are not given are all 0. Wherein the non-rotationally symmetric aspherical surface type can be defined by the formula (2) given in the above-described embodiment 1.
Figure BDA0002333392150000201
TABLE 16
Figure BDA0002333392150000202
Figure BDA0002333392150000211
TABLE 17-1
Flour mark A22 A24 A26 A28 A30
S1 -5.0813E-05 2.6949E-05 -1.3511E-05 6.1526E-06 -2.0574E-06
S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S8 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S9 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S11 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S12 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
TABLE 17-2
AAS noodle C2 C5 C6 C12 C13 C14 C23
S13 -1.3354E+00 -2.9289E-02 -1.2897E+00 -4.1724E-02 -2.8218E-02 7.1228E-02 -3.1462E-02
S14 -1.3859E+00 -2.1555E-03 -1.4931E+00 -1.5039E-02 7.5858E-04 -9.4212E-02 1.4861E-03
TABLE 18-1
AAS noodle C24 C25 C26 C38 C39 C40 C41
S13 -2.3055E-02 -1.4285E-02 2.7231E-02 -1.3319E-02 -1.1940E-02 -6.1553E-03 -3.2662E-03
S14 -9.1447E-03 3.1689E-03 -1.6711E-02 1.0756E-02 4.5384E-04 -2.0017E-03 3.4107E-03
TABLE 18-2
AAS noodle C42 C57 C58 C59 C60 C61 C62
S13 -9.3124E-03 -1.1031E-02 -3.8161E-03 -1.6506E-03 -3.3940E-04 -2.4326E-04 8.7589E-04
S14 3.2513E-03 -2.6105E-02 9.5589E-04 1.5648E-03 4.5372E-04 1.0415E-03 4.1916E-03
TABLE 18-3
Fig. 12 shows the size of the RMS spot diameter at different image height positions in the first quadrant for the optical imaging lens group of example 6. In FIG. 12, the minimum RMS spot diameter is 0.00093778mm, the maximum RMS spot diameter is 0.012802mm, the mean RMS spot diameter is 0.0030389mm, and the standard deviation of the RMS spot diameter is 0.0016825 mm. As can be seen from fig. 12, the optical imaging lens group according to embodiment 6 can achieve good imaging quality.
Example 7
An optical imaging lens group according to embodiment 7 of the present application is described below with reference to fig. 13 to 14. Fig. 13 shows a schematic structural view of an optical imaging lens group according to embodiment 7 of the present application.
As shown in fig. 13, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The object-side surface S11 and the image-side surface S12 of the sixth lens element E6 are aspheric. The object-side surface S13 and the image-side surface S14 of the seventh lens element E7 are aspheric. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In the present example, the effective focal length fx of the optical imaging lens group in the X-axis direction is 3.48mm, the effective focal length fy of the optical imaging lens group in the Y-axis direction is 3.49mm, the total length TTL of the optical imaging lens group is 7.45mm, half ImgH of the diagonal length of the effective pixel region on the imaging surface S17 of the optical imaging lens group is 5.35mm, half Smei-FOV of the maximum field angle of the optical imaging lens group is 56.7 °, and the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.48.
Table 19 shows a basic parameter table of the optical imaging lens group of example 7, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 20 shows the high-order coefficient A of each rotationally symmetric aspherical mirror surface used in example 74、A6、A8、A10、A12、A14、A16、A18And A20Wherein each rotationally symmetric aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1. Tables 21-1 to 21-3 show the numerical values of nonzero coefficients among the higher-order Zernike coefficients C2 to C67, which are usable for the non-rotationally symmetric aspherical surfaces S11 to S14 in example 7, and the SCO coefficients not given are all 0. Wherein the non-rotationally symmetric aspherical surface type can be defined by the formula (2) given in the above-described embodiment 1.
Figure BDA0002333392150000221
Figure BDA0002333392150000231
Watch 19
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.1587E+00 -1.3907E-01 2.4405E-02 -9.2359E-03 3.7362E-03 2.5369E-04 8.4649E-04 1.3440E-04 7.6202E-05
S2 6.8076E-01 -1.7769E-01 4.0400E-02 4.6415E-03 3.6601E-03 1.3095E-03 3.5269E-03 1.4891E-03 4.0534E-04
S3 -2.1516E-02 -1.5527E-02 4.2552E-03 9.5896E-04 1.8693E-04 -1.1515E-04 -1.9849E-05 -6.5572E-06 -2.9191E-06
S4 -4.9811E-02 -4.1824E-03 1.6942E-03 1.5418E-03 1.1175E-03 6.4396E-04 3.4516E-04 1.3031E-04 3.6113E-05
S5 -2.2289E-02 -6.8647E-04 3.6217E-04 -4.1818E-04 -6.0451E-04 -4.2262E-04 -2.1227E-04 -7.9744E-05 -2.1040E-05
S6 -1.0565E-01 8.2281E-03 7.6295E-03 4.3551E-03 1.5534E-03 4.0336E-04 4.5613E-05 -1.0498E-05 -1.6051E-06
S7 -2.1826E-01 3.8264E-02 6.1984E-03 -4.8302E-03 -4.8410E-03 -2.3867E-04 7.8284E-04 5.0880E-04 1.1118E-04
S8 -2.7231E-01 6.8243E-02 -3.0838E-03 3.8638E-03 -3.3385E-03 -8.2516E-05 -3.2740E-04 6.0905E-05 -4.0144E-06
S9 -5.4783E-01 1.5224E-01 -3.2511E-02 -1.8053E-03 3.6823E-04 1.3115E-03 -5.1100E-04 1.6311E-04 7.2754E-05
S10 -4.7939E-01 7.2216E-02 -2.4420E-02 -1.1431E-02 6.2817E-03 1.3577E-03 -3.0892E-03 -2.2214E-03 -5.3767E-04
Watch 20
AAS noodle C2 C5 C6 C12 C13 C14 C23
S11 -2.7052E-02 4.3354E-03 -1.6475E-02 2.7405E-03 2.2564E-03 -1.9974E-02 -2.3882E-03
S12 3.4789E-01 6.2605E-03 5.3286E-01 8.4674E-03 8.1174E-04 1.9329E-01 2.7462E-03
S13 -1.4208E+00 -4.1883E-02 -1.3376E+00 -6.5362E-02 -3.7772E-02 1.3082E-01 -3.3991E-02
S14 -1.6135E+00 5.8780E-02 -1.9139E+00 2.5310E-02 6.1101E-02 -1.4927E-01 1.2989E-01
TABLE 21-1
AAS noodle C24 C25 C26 C38 C39 C40 C41
S11 1.2660E-04 -9.8383E-04 -3.0194E-03 -1.4290E-03 -1.5284E-03 -1.3581E-04 -9.8152E-04
S12 3.1041E-03 -3.5375E-03 2.1359E-02 1.3592E-03 5.6911E-04 1.3783E-03 -2.6364E-03
S13 -2.5478E-02 -1.8407E-02 5.5329E-02 -3.0892E-03 -7.8267E-03 -2.7022E-03 -3.9994E-03
S14 3.0554E-02 3.9921E-02 -1.5001E-02 1.2979E-01 5.0715E-02 1.9363E-02 1.7200E-02
TABLE 21-2
AAS noodle C42 C57 C58 C59 C60 C61 C62
S11 1.6607E-03 1.4033E-03 -1.0573E-03 -4.6457E-04 -5.1960E-05 -4.4200E-04 -3.1046E-04
S12 -1.5217E-02 2.6656E-03 -7.0342E-04 1.5789E-04 3.5895E-04 -1.0626E-03 -1.1434E-02
S13 -3.0289E-02 3.5439E-03 -2.0125E-03 5.2692E-05 9.6007E-04 -5.1314E-05 -5.8188E-03
S14 2.0738E-02 3.0274E-02 1.6461E-02 9.9003E-03 5.8599E-03 3.8602E-03 5.4270E-03
Tables 21 to 3
Fig. 14 shows the size of the RMS spot diameter at different image height positions in the first quadrant for the optical imaging lens group of example 7. In FIG. 14, the minimum RMS spot diameter is 0.00074801mm, the maximum RMS spot diameter is 0.010104mm, the mean RMS spot diameter is 0.002244mm, and the standard deviation of the RMS spot diameter is 0.0010071 mm. As can be seen from fig. 14, the optical imaging lens group according to embodiment 7 can achieve good imaging quality.
Example 8
An optical imaging lens group according to embodiment 8 of the present application is described below with reference to fig. 15 to 16. Fig. 15 shows a schematic structural view of an optical imaging lens group according to embodiment 8 of the present application.
As shown in fig. 15, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The object-side surface S5 and the image-side surface S6 of the third lens element E3 are aspheric. The object-side surface S13 and the image-side surface S14 of the seventh lens element E7 are aspheric. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In the present example, the effective focal length fx of the optical imaging lens group in the X-axis direction is 3.44mm, the effective focal length fy of the optical imaging lens group in the Y-axis direction is 3.44mm, the total length TTL of the optical imaging lens group is 7.38mm, half ImgH of the diagonal length of the effective pixel region on the imaging surface S17 of the optical imaging lens group is 5.35mm, half Smei-FOV of the maximum field angle of the optical imaging lens group is 57.5 °, and the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.48.
Table 22 shows a basic parameter table of the optical imaging lens group of embodiment 8, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 23 shows the high-order coefficient A of each rotationally symmetric aspherical mirror surface used in example 84、A6、A8、A10、A12、A14、A16、A18And A20Wherein each rotationally symmetric aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1. Tables 24-1 to 24-3 show non-rotationally symmetric aspherical surfaces S5, S6, S13 and S14 which can be used in example 8The values of the non-zero coefficients of the high-order Zernike coefficients C2-C67, which are not given, are all 0. Wherein the non-rotationally symmetric aspherical surface type can be defined by the formula (2) given in the above-described embodiment 1.
Figure BDA0002333392150000251
TABLE 22
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.1731E+00 -1.4601E-01 2.1983E-02 -1.1569E-02 2.8630E-03 1.8765E-06 8.6724E-04 1.5827E-04 9.8830E-05
S2 6.8582E-01 -1.8272E-01 4.1272E-02 6.8477E-03 3.1822E-03 4.7338E-04 3.3577E-03 1.7039E-03 5.2827E-04
S3 -1.9342E-02 -1.5453E-02 4.1532E-03 1.0654E-03 2.6721E-04 -8.3325E-05 -2.1513E-05 -1.6318E-05 -5.0846E-06
S4 -5.0248E-02 -4.1088E-03 1.4386E-03 1.4325E-03 1.0136E-03 5.7771E-04 2.9659E-04 1.0724E-04 2.8766E-05
S7 -2.2172E-01 3.0170E-02 3.0087E-03 -4.6021E-03 -4.0233E-03 3.5622E-04 6.1507E-04 2.8569E-04 1.9800E-05
S8 -3.0126E-01 7.6906E-02 -7.1610E-03 5.1832E-03 -3.7799E-03 5.9292E-04 -3.3554E-04 6.4856E-05 -2.9536E-05
S9 -6.1188E-01 1.5601E-01 -3.3964E-02 2.6814E-04 -7.8356E-05 1.6153E-03 -6.6605E-04 1.3504E-04 1.1513E-04
S10 -4.8197E-01 7.9596E-02 -2.0076E-02 -1.8384E-02 6.7445E-03 2.4237E-03 -2.5477E-03 -2.4100E-03 -4.7202E-04
S11 -1.9637E-02 -2.3763E-02 1.1201E-02 -3.5280E-03 3.0759E-03 1.3124E-03 1.2233E-03 2.0537E-04 6.2674E-05
S12 1.0180E+00 4.2771E-02 -4.9856E-03 -2.6102E-02 7.5908E-03 1.7482E-03 -7.2891E-04 -6.7021E-04 -1.1320E-05
TABLE 23
AAS noodle C2 C5 C6 C12 C13 C14 C23
S5 -1.5875E-02 6.3232E-04 -1.0988E-02 1.6104E-04 3.5553E-04 -4.0542E-03 -3.7751E-06
S6 -4.4071E-02 1.3367E-03 -5.3616E-02 -1.2701E-03 7.1576E-04 -1.2354E-02 -7.4004E-04
S13 -1.4304E+00 -6.2115E-02 -1.3627E+00 -6.9101E-02 -5.4898E-02 1.3752E-01 -3.1502E-02
S14 -1.6269E+00 -9.4678E-03 -1.9000E+00 9.6156E-03 1.1043E-02 -1.5994E-01 9.7685E-02
TABLE 24-1
AAS noodle C24 C25 C26 C38 C39 C40 C41
S5 1.6313E-04 1.4644E-04 2.7289E-04 2.0981E-05 -9.6432E-06 9.1231E-05 5.3725E-05
S6 -7.9575E-04 2.9735E-04 7.5585E-03 1.1614E-04 -3.6440E-04 -3.4228E-04 8.6667E-05
S13 -3.3894E-02 -2.8176E-02 4.4575E-02 3.7075E-03 -1.2846E-02 -8.7562E-03 -8.2891E-03
S14 1.0523E-02 2.1413E-02 -1.5128E-02 1.1768E-01 1.9566E-02 7.5014E-03 1.3245E-02
TABLE 24-2
AAS noodle C42 C57 C58 C59 C60 C61 C62
S5 3.4036E-04 2.3107E-05 -1.6000E-05 4.0862E-06 3.0284E-05 1.3051E-05 5.7011E-05
S6 3.5239E-03 -9.2113E-05 2.7817E-05 -8.3749E-05 -6.6322E-05 1.0425E-05 7.9186E-04
S13 -2.9554E-02 1.6822E-02 -3.3667E-03 -1.8756E-03 -7.8381E-04 -1.0544E-03 1.2891E-03
S14 2.2422E-02 6.0031E-02 4.1203E-03 2.4464E-03 2.6136E-03 3.2772E-03 8.7145E-03
TABLE 24-3
Fig. 16 shows the size of the RMS spot diameter at different image height positions in the first quadrant for the optical imaging lens group of example 8. In FIG. 16, the minimum RMS spot diameter is 0.00078009mm, the maximum RMS spot diameter is 0.0066518mm, the mean RMS spot diameter is 0.0020925mm, and the standard deviation of the RMS spot diameter is 0.0008688 mm. As can be seen from fig. 16, the optical imaging lens group according to embodiment 8 can achieve good imaging quality.
Example 9
An optical imaging lens group according to embodiment 9 of the present application is described below with reference to fig. 17 to 18. Fig. 17 shows a schematic structural view of an optical imaging lens group according to embodiment 9 of the present application.
As shown in fig. 17, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image plane S17.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The object-side surface S9 and the image-side surface S10 of the fifth lens element E5 are aspheric. The object-side surface S13 and the image-side surface S14 of the seventh lens element E7 are aspheric. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In the present example, the effective focal length fx of the optical imaging lens group in the X-axis direction is 3.48mm, the effective focal length fy of the optical imaging lens group in the Y-axis direction is 3.48mm, the total length TTL of the optical imaging lens group is 7.45mm, half ImgH of the diagonal length of the effective pixel region on the imaging surface S17 of the optical imaging lens group is 5.35mm, half Smei-FOV of the maximum field angle of the optical imaging lens group is 57.2 °, and the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.48.
Table 25 shows a basic parameter table of the optical imaging lens group of example 9, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 26 shows the high-order coefficient A of each rotationally symmetric aspherical mirror surface used in example 94、A6、A8、A10、A12、A14、A16、A18And A20Wherein each rotationally symmetric aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1. Tables 27-1 to 27-3 show the numerical values of nonzero coefficients among the high-order Zernike coefficients C2 to C67 of the non-rotationally symmetric aspherical surfaces S9, S10, S13 and S14 that can be used in example 9, and the SCO coefficients that are not given are all 0. Wherein the non-rotationally symmetric aspherical surface type can be defined by the formula (2) given in the above-described embodiment 1.
Figure BDA0002333392150000271
TABLE 25
Figure BDA0002333392150000272
Figure BDA0002333392150000281
Watch 26
AAS noodle C2 C5 C6 C12 C13 C14 C23
S9 -2.1733E-01 2.5735E-03 -2.2846E-01 -2.9415E-04 3.7321E-04 1.0823E-02 -1.9389E-03
S10 -1.4158E-01 2.7316E-03 -2.1510E-01 5.7160E-04 -7.1156E-04 -2.9334E-02 8.0516E-05
S13 -1.4048E+00 -4.7954E-02 -1.3327E+00 -5.3372E-02 -3.9489E-02 1.4195E-01 -3.0121E-02
S14 -1.6285E+00 2.1744E-02 -1.9478E+00 4.3880E-02 4.9910E-02 -1.7964E-01 8.8704E-02
TABLE 27-1
AAS noodle C24 C25 C26 C38 C39 C40 C41
S9 -2.5600E-04 -3.7893E-05 2.2264E-02 -9.8438E-04 -8.4962E-04 7.8876E-05 2.1337E-04
S10 7.6599E-04 -9.0952E-04 5.0341E-03 -3.8051E-04 3.5955E-04 8.7466E-04 -1.1532E-04
S13 -2.3742E-02 -1.6986E-02 4.8605E-02 6.1531E-04 -9.2410E-03 -4.3795E-03 -2.7562E-03
S14 3.9520E-02 5.1669E-02 7.9105E-03 1.2279E-01 1.7607E-02 2.1782E-02 2.7861E-02
TABLE 27-2
AAS noodle C42 C57 C58 C59 C60 C61 C62
S9 -1.1646E-02 7.0309E-04 -3.7707E-04 -1.9143E-04 7.5307E-05 1.3136E-04 -1.0847E-03
S10 -1.7351E-02 1.1137E-03 -2.6548E-04 2.5441E-04 3.4590E-04 6.5738E-05 -7.2452E-03
S13 -2.7915E-02 1.2787E-02 -2.5076E-03 -3.1030E-04 2.4366E-04 3.8594E-04 8.8407E-04
S14 3.5863E-02 6.3900E-02 4.0459E-03 3.4392E-03 6.1298E-03 6.9028E-03 1.4416E-02
Tables 27-3
Fig. 18 shows the size of the RMS spot diameter at different image height positions in the first quadrant for the optical imaging lens group of example 9. In FIG. 18, the minimum RMS spot diameter is 0.00073748mm, the maximum RMS spot diameter is 0.0068903mm, the mean RMS spot diameter is 0.0020563mm, and the standard deviation of the RMS spot diameter is 0.00091036 mm. As can be seen from fig. 4, the optical imaging lens group according to embodiment 2 can achieve good imaging quality.
In summary, examples 1 to 9 each satisfy the relationship shown in table 28.
Figure BDA0002333392150000282
Figure BDA0002333392150000291
Watch 28
The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens group described above.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (33)

1. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises: a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power,
wherein:
at least one mirror surface of the object side surface of the first lens to the image side surface of the seventh lens is a non-rotationally symmetric aspheric surface;
the optical imaging lens group has a first direction and a second direction perpendicular to each other on a plane perpendicular to the optical axis, a part of optical parameters in the first direction being different from the part of optical parameters in the second direction; and
in the first direction, one half ImgH of a diagonal length of an effective pixel area on an imaging surface of the optical imaging lens group satisfies: ImgH > 5 mm.
2. The optical imaging lens group of claim 1 wherein, in the first direction, half of the Semi-FOV of the maximum field angle of the optical imaging lens group satisfies: Semi-FOV > 50.
3. The optical imaging lens group of claim 1, wherein in the first direction, a distance TTL between an object side surface of the first lens and an imaging surface of the optical imaging lens group on the optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens group satisfy: TTL/ImgH is less than 1.6.
4. The optical imaging lens group of claim 1, wherein the effective focal length fy in the first direction and the effective focal length f3 of the third lens satisfy: 0.5 < fy/f3 < 1.5.
5. The optical imaging lens group of claim 1, wherein the effective focal length fx of the second direction and the effective focal length f7 of the seventh lens satisfy: -1.5 < f7/fx < -0.5.
6. The optical imaging lens group of claim 1 wherein, in the first direction, a center thickness CT3 of the third lens on the optical axis and an edge thickness ET3 of the third lens satisfy: 0.3 < ET3/CT3 < 0.8.
7. The optical imaging lens group of claim 1 wherein, in the first direction, a center thickness CT7 of the seventh lens on the optical axis and an edge thickness ET7 of the seventh lens satisfy: 0.3 < CT7/ET7 < 0.8.
8. The optical imaging lens group of claim 1, wherein, in the first direction, a distance SAG61 on the optical axis from an intersection point of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of the object-side surface of the sixth lens to a distance SAG62 on the optical axis from an intersection point of an image-side surface of the sixth lens and the optical axis to an effective radius vertex of the image-side surface of the sixth lens satisfies: 0.2 < SAG61/SAG62 < 0.7.
9. The optical imaging lens group of claim 1, wherein the effective focal length f2 of the second lens, the effective focal length f4 of the fourth lens, and the effective focal length f6 of the sixth lens satisfy: 0.2 < (f6-f4)/f2 < 1.0.
10. The optical imaging lens group of claim 1, wherein the radius of curvature of the object-side surface of the first lens, R1, the radius of curvature of the image-side surface of the first lens, R2, and the effective focal length of the first lens, f1, satisfy: 0.1 < (R2-R1)/f1 < 0.6.
11. The optical imaging lens group of claim 1, wherein in the first direction, a radius of curvature R3 of an object-side surface of the second lens, a radius of curvature R4 of an image-side surface of the second lens, a radius of curvature R13 of an object-side surface of the seventh lens, and a radius of curvature R14 of an image-side surface of the seventh lens satisfy: 0.2 < (R13+ R14)/(R3+ R4) < 0.7.
12. The optical imaging lens group of claim 1, wherein in the first direction, a radius of curvature R6 of an image-side surface of the third lens, 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: 0.2 < R6/(R11+ R12) < 0.7.
13. The optical imaging lens group of claim 1 wherein, in the first direction, a center thickness CT1 of the first lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy: 0.4 < CT4/CT1 < 1.0.
14. The optical imaging lens group of claim 1, wherein, in the first direction, a center thickness CT2 of the second lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, and a center thickness CT6 of the sixth lens on the optical axis satisfy: 0.5 < (CT2+ CT5)/CT6 < 1.0.
15. The optical imaging lens group of any of claims 1-14, wherein the first lens has a negative optical power and its image side surface is convex.
16. The optical imaging lens group of any of claims 1-14, wherein the sixth lens element has a positive optical power and has a concave object-side surface and a convex image-side surface.
17. The optical imaging lens group of any of claims 1-14, wherein the seventh lens element has a negative optical power and has a convex object-side surface and a concave image-side surface.
18. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises: a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power,
wherein:
at least one mirror surface of the object side surface of the first lens to the image side surface of the seventh lens is a non-rotationally symmetric aspheric surface;
the optical imaging lens group has a first direction and a second direction perpendicular to each other on a plane perpendicular to the optical axis, a part of optical parameters in the first direction being different from the part of optical parameters in the second direction; and
an effective focal length f2 of the second lens, an effective focal length f4 of the fourth lens, and an effective focal length f6 of the sixth lens satisfy: 0.2 < (f6-f4)/f2 < 1.0.
19. The optical imaging lens group of claim 18 wherein, in the first direction, half of the Semi-FOV of the maximum field angle of the optical imaging lens group satisfies: Semi-FOV > 50.
20. The optical imaging lens group of claim 18, wherein in the first direction, a distance TTL between an object side surface of the first lens and an imaging surface of the optical imaging lens group on the optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens group satisfy: TTL/ImgH is less than 1.6.
21. The optical imaging lens group of claim 18, wherein the effective focal length fy in the first direction and the effective focal length f3 of the third lens satisfy: 0.5 < fy/f3 < 1.5.
22. The optical imaging lens group of claim 18, wherein the effective focal length fx of the second direction and the effective focal length f7 of the seventh lens satisfy: -1.5 < f7/fx < -0.5.
23. The optical imaging lens group of claim 18 wherein, in the first direction, a center thickness CT3 of the third lens on the optical axis and an edge thickness ET3 of the third lens satisfy: 0.3 < ET3/CT3 < 0.8.
24. The optical imaging lens group of claim 18 wherein, in the first direction, a center thickness CT7 of the seventh lens on the optical axis and an edge thickness ET7 of the seventh lens satisfy: 0.3 < CT7/ET7 < 0.8.
25. The optical imaging lens group of claim 18 wherein, in the first direction, a distance SAG61 on the optical axis from an intersection point of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of the object-side surface of the sixth lens to a distance SAG62 on the optical axis from an intersection point of an image-side surface of the sixth lens and the optical axis to an effective radius vertex of the image-side surface of the sixth lens satisfies: 0.2 < SAG61/SAG62 < 0.7.
26. The optical imaging lens group of claim 18, wherein the radius of curvature of the object-side surface of the first lens, R1, the radius of curvature of the image-side surface of the first lens, R2, and the effective focal length of the first lens, f1, satisfy: 0.1 < (R2-R1)/f1 < 0.6.
27. The optical imaging lens group of claim 18 wherein, in the first direction, a radius of curvature R3 of an object-side surface of the second lens, a radius of curvature R4 of an image-side surface of the second lens, a radius of curvature R13 of an object-side surface of the seventh lens, and a radius of curvature R14 of an image-side surface of the seventh lens satisfy: 0.2 < (R13+ R14)/(R3+ R4) < 0.7.
28. The optical imaging lens group of claim 18 wherein, in the first direction, a radius of curvature R6 of an image-side surface of the third lens, 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: 0.2 < R6/(R11+ R12) < 0.7.
29. The optical imaging lens group of claim 18 wherein, in the first direction, a center thickness CT1 of the first lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy: 0.4 < CT4/CT1 < 1.0.
30. The optical imaging lens group of claim 18 wherein, in the first direction, a center thickness CT2 of the second lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, and a center thickness CT6 of the sixth lens on the optical axis satisfy: 0.5 < (CT2+ CT5)/CT6 < 1.0.
31. The optical imaging lens group of any of claims 18-30, wherein the first lens has a negative optical power and its image side surface is convex.
32. The optical imaging lens group of any of claims 18-30, wherein the sixth lens element has positive optical power and has a concave object-side surface and a convex image-side surface.
33. The optical imaging lens group of any of claims 18-30, wherein the seventh lens element has a negative optical power and has a convex object-side surface and a concave image-side surface.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110927933A (en) * 2019-12-24 2020-03-27 浙江舜宇光学有限公司 Optical imaging lens group
CN113484997A (en) * 2021-09-08 2021-10-08 江西晶超光学有限公司 Optical lens, camera module and electronic equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110927933A (en) * 2019-12-24 2020-03-27 浙江舜宇光学有限公司 Optical imaging lens group
CN110927933B (en) * 2019-12-24 2021-10-15 浙江舜宇光学有限公司 Optical imaging lens group
CN113484997A (en) * 2021-09-08 2021-10-08 江西晶超光学有限公司 Optical lens, camera module and electronic equipment
CN113484997B (en) * 2021-09-08 2022-02-11 江西晶超光学有限公司 Optical lens, camera module and electronic equipment

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