CN216901113U - Optical imaging lens - Google Patents
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- CN216901113U CN216901113U CN202220166375.5U CN202220166375U CN216901113U CN 216901113 U CN216901113 U CN 216901113U CN 202220166375 U CN202220166375 U CN 202220166375U CN 216901113 U CN216901113 U CN 216901113U
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Abstract
The application discloses optical imaging lens, including first battery of lens and second battery of lens, first battery of lens includes: first lens, second lens, third lens, fourth lens and fifth lens, the second lens group includes: a sixth lens element, a seventh lens element, and an eighth lens element; the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element are sequentially arranged from an object side to an image side along an optical axis; the second lens has negative focal power, and the object side surface of the sixth lens is a concave surface. The half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens satisfies: ImgH >8 mm. The distance TTL from the object side surface of the first lens to the imaging surface along the optical axis and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfy that: TTL/ImgH < 1.3. The effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the following conditions: f/EPD < 1.9. The effective focal length Ff of the first lens group and the effective focal length Fs of the second lens group meet: -0.5< Ff/Fs <0.
Description
Technical Field
The present application relates to the field of optical elements, and more particularly, to an optical imaging lens.
Background
In recent years, portable electronic devices such as mobile phones have been developed rapidly, and optical imaging lenses mounted on these electronic devices have been developed in a direction of high pixel, large aperture, and thinness. The lens has high pixels so that the photographing is clearer, the large-aperture characteristic is provided so that the lens still has good photographing performance in a dark environment, and the ultra-thin development trend of the lens is favorable for better integration with portable electronic equipment such as a mobile phone. An ordinary mobile phone lens generally comprises a plastic lens, the optical performance of the lens is limited by the refractive index and the dispersion coefficient of the plastic lens, and the optical performance of the lens at a higher or lower temperature is also adversely affected due to the fact that the plastic lens is easy to deform along with the change of the environmental temperature.
Therefore, an optical imaging lens with the characteristics of high pixel, large aperture, ultra-thin and higher resolving power is needed in the market at present, so as to better meet the requirements of manufacturers of smart devices such as mobile phones.
SUMMERY OF THE UTILITY MODEL
The application provides an optical imaging lens, including first lens group and second lens group, first lens group includes: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, the second lens group including: a sixth lens element, a seventh lens element, and an eighth lens element; the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element are sequentially arranged from an object side to an image side along an optical axis; the second lens has negative focal power, and the object side surface of the sixth lens is a concave surface. The half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can satisfy: ImgH >8 mm. The distance TTL from the object side surface of the first lens to the imaging surface along the optical axis and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can satisfy the following conditions: TTL/ImgH < 1.3. The effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens can satisfy the following conditions: f/EPD < 1.9. An effective focal length Ff of the first lens group and an effective focal length Fs of the second lens group may satisfy: -0.5< Ff/Fs <0.
In one embodiment, the abbe number V1 of the first lens may satisfy: v1> 60.
In one embodiment, the effective focal length f5 of the fifth lens, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens may satisfy: 0.5< f5/(f1+ f2) < 2.0.
In one embodiment, the effective focal length f4 of the fourth lens and the effective focal length f3 of the third lens may satisfy: 0< f4/(f3+ f4) < 1.0.
In one embodiment, the effective focal length f7 of the seventh lens and the effective focal length f8 of the eighth lens may satisfy: 0< (f7+ f8)/f < 1.0.
In one embodiment, a radius of curvature R13 of the object-side surface of the seventh lens and a radius of curvature R14 of the image-side surface of the seventh lens may satisfy: 0.3< R13/R14< 1.0.
In one embodiment, an average value avFp of the effective focal lengths of all of the lenses having positive optical power of the first to eighth lenses and an average value avFn of the effective focal lengths of all of the lenses having negative optical power of the first to eighth lenses may satisfy: 0< | (avFp + avFn) |/(avFp-avFn) < 1.0.
In one embodiment, a radius of curvature R11 of an object-side surface of the sixth lens, a radius of curvature R12 of an image-side surface of the sixth lens, a radius of curvature R9 of an object-side surface of the fifth lens, and a radius of curvature R10 of an image-side surface of the fifth lens may satisfy: -1.0< (R11+ R12)/(R9+ R10) <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, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens may satisfy: 1.0< (R1+ R2)/(R3+ R4) < 2.0.
In one embodiment, a sum Σ CTf of center thicknesses on the optical axis of respective lenses included in the first lens group and a center thickness CT1 of the first lens on the optical axis may satisfy: 2.0< Σ CTf/CT1< 3.0.
In one embodiment, a sum Σ CTs of center thicknesses on the optical axis of respective lenses included in the second lens group and a sum Σ ATs of separation distances on the optical axis of any adjacent two lenses among the respective lenses included in the second lens group may satisfy: 0.5< Σ CTs/Σ ATs < 1.5.
In one embodiment, a center thickness CT7 of the seventh lens on the optical axis and a separation distance T78 of the seventh lens and the eighth lens on the optical axis may satisfy: 0< CT7/T78< 0.5.
In one embodiment, a maximum effective radius DT62 of an image-side surface of the sixth lens and a maximum effective radius DT71 of an object-side surface of the seventh lens may satisfy: 0.3< DT62/DT71< 1.3.
In one embodiment, a combined focal length f34 of the third and fourth lenses and a combined focal length f56 of the fifth and sixth lenses may satisfy: -2.0< f34/f56< -0.5.
In one embodiment, the edge thickness ET5 of the fifth lens, the edge thickness ET6 of the sixth lens, the edge thickness ET7 of the seventh lens, and the edge thickness ET8 of the eighth lens may satisfy: 0.5< (ET5+ ET6)/(ET7+ ET8) < 1.5.
In one embodiment, an on-axis distance SAG71 from an intersection point of an object-side surface of the seventh lens and the optical axis to an effective radius vertex of the object-side surface of the seventh lens and an on-axis distance SAG72 from an intersection point of an image-side surface of the seventh lens and the optical axis to an effective radius vertex of the image-side surface of the seventh lens may satisfy: 0.3< SAG71/SAG72< 1.3.
In one embodiment, the first lens element can have a positive optical power, a convex object-side surface and a concave image-side surface; the second lens can have negative focal power, and the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens can have positive focal power, and the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; and the fourth lens can have positive focal power, and the object side surface of the fourth lens is a concave surface and the image side surface of the fourth lens is a convex surface.
In one embodiment, the fifth lens element can have a negative optical power, a convex object-side surface and a concave image-side surface; the sixth lens has focal power, and the image side surface of the sixth lens is a convex surface; the seventh lens can have positive focal power, and the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; and the eighth lens element may have a negative power, and the object-side surface thereof is concave and the image-side surface thereof is convex.
This application has adopted eight formula camera lens frameworks, through rational distribution each lens focal power, the face type, thickness and the abbe number etc. of optimal selection each lens, provides the mixed optical imaging camera lens of glass moulding that has at least one of high pixel, big light ring, ultra-thin and higher analytic power etc. beneficial effect, is favorable to satisfying the market demand better.
Drawings
Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic structural view of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 1, respectively;
fig. 3 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 2, respectively;
fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;
fig. 6A to 6C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 3, respectively;
fig. 7 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application;
fig. 8A to 8C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 4, respectively;
fig. 9 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application;
fig. 10A to 10C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 5, respectively;
fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application;
fig. 12A to 12C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 6, respectively;
fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application;
fig. 14A to 14C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of an optical imaging lens of embodiment 7, respectively;
fig. 15 is a schematic structural view showing an optical imaging lens according to embodiment 8 of the present application; and
fig. 16A to 16C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 8, respectively.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. In this document, the surface of each lens closest to the subject is referred to as the object-side surface of the lens, and the surface of each lens closest to the image plane is referred to as the image-side surface of the lens.
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 examples or illustrations.
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.
An optical imaging lens according to an exemplary embodiment of the present application may include, for example, eight lenses, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The eight lenses are arranged in order from an object side to an image side along an optical axis. The eight lenses may be divided into a first lens group and a second lens group, wherein the first lens group may include a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, and the second lens group may include a sixth lens, a seventh lens, and an eighth lens.
In an exemplary embodiment, at least one of the first to eighth lenses may be a glass aspherical lens. The system comprises a glass aspheric lens to improve the image quality of the system.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression ImgH >8mm, where ImgH is half the diagonal length of an effective pixel area on an imaging plane of the optical imaging lens. By controlling the value of half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens to be larger than 8mm, the large image surface characteristic of the system can be ensured, and higher resolution is realized. Illustratively, ImgH may satisfy 8.0mm < ImgH < 9.2 mm.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression TTL/ImgH <1.3, where TTL is a distance along the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, and ImgH is a half of a diagonal length of the effective pixel area on the imaging surface of the optical imaging lens. The system ultra-thin characteristic can be realized by controlling the ratio of the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis to the half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens in the range. Illustratively, TTL can satisfy 9.9mm < TTL < 10.9mm, and ImgH can satisfy 8.0mm < ImgH < 9.2 mm.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression f/EPD <1.9, where f is an effective focal length of the optical imaging lens and EPD is an entrance pupil diameter of the optical imaging lens. By controlling the ratio of the effective focal length of the optical imaging lens to the entrance pupil diameter of the optical imaging lens in the range, the characteristic of large aperture of the system can be realized.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-0.5 < Ff/Fs <0, where Ff is an effective focal length of the first lens group of the optical imaging lens and Fs is an effective focal length of the second lens group of the optical imaging lens. By controlling the ratio of the effective focal length of the first lens group of the optical imaging lens to the effective focal length of the second lens group of the optical imaging lens in the range, the focal power of the first lens group and the focal power of the second lens group can be reasonably distributed, and the resolving power of the optical system is improved. More specifically, Ff and Fs may satisfy-0.4 < Ff/Fs < -0.1.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression V1>60, where V1 is an abbe number of the first lens. By controlling the abbe number of the first lens to be in the range, the imaging quality of the lens can be improved. More specifically, V1 may satisfy V1> 80.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5< f5/(f1+ f2) <2.0, where f5 is an effective focal length of the fifth lens, f1 is an effective focal length of the first lens, and f2 is an effective focal length of the second lens. By controlling the ratio of the effective focal length of the fifth lens to the sum of the effective focal length of the first lens and the effective focal length of the second lens to be in the range, the focal lengths of the first lens, the second lens and the fifth lens can be reasonably distributed, the aberration of the system is reduced, and the image quality is improved. More specifically, f5, f1, and f2 may satisfy 0.5< f5/(f1+ f2) < 1.8.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0< f4/(f3+ f4) <1.0, where f4 is an effective focal length of the fourth lens and f3 is an effective focal length of the third lens. By controlling the effective focal length of the fourth lens and the effective focal length of the third lens to satisfy 0< f4/(f3+ f4) <1.0, the focal lengths of the third lens and the fourth lens can be reasonably distributed, the aberration of the system is reduced, and the image quality is improved. More specifically, f4 and f3 may satisfy 0.2< f4/(f3+ f4) < 0.95.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0< (f7+ f8)/f <1.0, where f7 is an effective focal length of the seventh lens, f8 is an effective focal length of the eighth lens, and f is an effective focal length of the optical imaging lens. By controlling the ratio of the sum of the effective focal length of the seventh lens and the effective focal length of the eighth lens to the effective focal length of the optical imaging lens within the range, the focal lengths of the seventh lens and the eighth lens can be reasonably distributed, the aberration of the system is reduced, and the image quality is improved. More specifically, f7, f8 and f may satisfy 0.3< (f7+ f8)/f < 0.9.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.3< R13/R14<1.0, where R13 is a radius of curvature of an object-side surface of the seventh lens, and R14 is a radius of curvature of an image-side surface of the seventh lens. By controlling the ratio of the curvature radius of the object side surface of the seventh lens to the curvature radius of the image side surface of the seventh lens to be in the range, the processability of the seventh lens can be ensured, the aberration of the system is reduced, and the image quality is improved. More specifically, R13 and R14 may satisfy 0.45< R13/R14< 0.8.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0< | (avFp + avFn) |/(avFp-avFn) <1.0, where avFp is an average value of effective focal lengths of all of the first to eighth lenses having positive optical power, and avFn is an average value of effective focal lengths of all of the first to eighth lenses having negative optical power. By controlling the average value of the effective focal lengths of all the lenses with positive focal power in the first lens to the eighth lens and the average value of the effective focal lengths of all the lenses with negative focal power in the first lens to the eighth lens to meet 0< | (avFp + avFn) |/(avFp-avFn) <1.0, the focal lengths of the system can be reasonably distributed, the aberration of the system is reduced, and the image quality is improved. More specifically, avFp and avFn may satisfy 0.2< | (avFp + avFn) |/(avFp-avFn) < 0.8.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1.0 < (R11+ R12)/(R9+ R10) <0, where R11 is a radius of curvature of an object-side surface of the sixth lens, R12 is a radius of curvature of an image-side surface of the sixth lens, R9 is a radius of curvature of an object-side surface of the fifth lens, and R10 is a radius of curvature of an image-side surface of the fifth lens. By controlling the ratio of the sum of the curvature radius of the object-side surface of the sixth lens element and the curvature radius of the image-side surface of the sixth lens element to the sum of the curvature radius of the object-side surface of the fifth lens element and the curvature radius of the image-side surface of the fifth lens element to be within the range, the processability of the sixth lens element and the fifth lens element can be ensured, the aberration of the system can be reduced, and the image quality can be improved. More specifically, R11, R12, R9 and R10 may satisfy-0.8 < (R11+ R12)/(R9+ R10) < -0.2.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.0< (R1+ R2)/(R3+ R4) <2.0, where R1 is a radius of curvature of an object-side surface of the first lens, R2 is a radius of curvature of an image-side surface of the first lens, R3 is a radius of curvature of an object-side surface of the second lens, and R4 is a radius of curvature of an image-side surface of the second lens. By controlling the ratio of the sum of the curvature radius of the object side surface of the first lens and the curvature radius of the image side surface of the first lens to the sum of the curvature radius of the object side surface of the second lens and the curvature radius of the image side surface of the second lens to be in the range, the processability of the first lens and the second lens can be ensured, the aberration of the system is reduced, and the image quality is improved. More specifically, R1, R2, R3 and R4 may satisfy 1.1< (R1+ R2)/(R3+ R4) < 1.7.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 2.0< Σ CTf/CT1<3.0, where Σ CTf is the sum of the center thicknesses of the respective lenses included in the first lens group of the optical imaging lens on the optical axis, and CT1 is the center thickness of the first lens on the optical axis. By controlling the ratio of the sum of the center thicknesses of the lenses included in the first lens group of the optical imaging lens on the optical axis to the center thickness of the first lens on the optical axis to be within this range, the workability of the first lens can be ensured. More specifically, Σ CTf and CT1 may satisfy 2.3< Σ CTf/CT1< 2.9.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5< Σ CTs/Σ ATs <1.5, where Σ CTs is a sum of central thicknesses on the optical axis of each lens included in the second lens group of the optical imaging lens, and Σ ATs is a sum of separation distances on the optical axis of any two adjacent lenses among the lenses included in the second lens group of the optical imaging lens. The ratio of the sum of the central thicknesses of the lenses in the second lens group of the optical imaging lens on the optical axis to the sum of the spacing distances of any two adjacent lenses in the second lens group of the optical imaging lens on the optical axis is controlled to be in the range, so that the processability of the lenses of the optical system can be ensured. More specifically, Σ CTs and Σ ATs may satisfy 0.6< Σ CTs/Σ ATs < 1.3.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0< CT7/T78<0.5, where CT7 is a center thickness of the seventh lens on the optical axis, and T78 is a separation distance of the seventh lens and the eighth lens on the optical axis. By controlling the ratio of the central thickness of the seventh lens on the optical axis to the distance between the seventh lens and the eighth lens on the optical axis within the range, the thickness of the seventh lens and the distance between the seventh lens and the eighth lens of the optical system can be ensured within a reasonable range, and the processability of the seventh lens and the eighth lens can be ensured. More specifically, CT7 and T78 may satisfy 0.15< CT7/T78< 0.45.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.3< DT62/DT71<1.3, where DT62 is a maximum effective radius of an image-side surface of the sixth lens, and DT71 is a maximum effective radius of an object-side surface of the seventh lens. By controlling the ratio of the maximum effective radius of the image side surface of the sixth lens to the maximum effective radius of the object side surface of the seventh lens within the range, the light rays passing through the sixth lens and the seventh lens of the optical system can be ensured to be smooth and stable, and the system aberration is reduced. More specifically, DT62 and DT71 may satisfy 0.45< DT62/DT71< 1.15.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-2.0 < f34/f56< -0.5, where f34 is a combined focal length of the third lens and the fourth lens, and f56 is a combined focal length of the fifth lens and the sixth lens. By controlling the ratio of the combined focal length of the third lens and the fourth lens to the combined focal length of the fifth lens and the sixth lens in the range, the focal length of the system can be reasonably distributed, the aberration of the system is reduced, and the image quality is improved. More specifically, f34 and f56 can satisfy-1.9 < f34/f56< -0.6.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5< (ET5+ ET6)/(ET7+ ET8) <1.5, where ET5 is an edge thickness of the fifth lens, ET6 is an edge thickness of the sixth lens, ET7 is an edge thickness of the seventh lens, and ET8 is an edge thickness of the eighth lens. By controlling the ratio of the sum of the edge thickness of the fifth lens and the edge thickness of the sixth lens to the sum of the edge thickness of the seventh lens and the edge thickness of the eighth lens to be within this range, the workability of the fifth lens, the sixth lens, the seventh lens, and the eighth lens of the optical system can be ensured. More specifically, ET5, ET6, ET7, and ET8 may satisfy 0.55< (ET5+ ET6)/(ET7+ ET8) < 1.4.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.3< SAG71/SAG72<1.3, where SAG71 is an on-axis distance from an intersection point of an object-side surface of the seventh lens and the optical axis to an effective radius vertex of the object-side surface of the seventh lens, and SAG72 is an on-axis distance from an intersection point of an image-side surface of the seventh lens and the optical axis to an effective radius vertex of the image-side surface of the seventh lens. By controlling the ratio of the on-axis distance from the intersection point of the object-side surface and the optical axis of the seventh lens to the effective radius vertex of the object-side surface of the seventh lens to the on-axis distance from the intersection point of the image-side surface and the optical axis of the seventh lens to the effective radius vertex of the image-side surface of the seventh lens to be within the range, the edge thickness of the seventh lens and the bending degree of the lens can be controlled, and the processability of the seventh lens can be ensured. More specifically, SAG71 and SAG72 may satisfy 0.4< SAG71/SAG72< 1.1.
In an exemplary embodiment, the second lens may have a negative power.
In an exemplary embodiment, the object side surface of the sixth lens may be a concave surface.
In an exemplary embodiment, the first lens may have a positive optical power, and the object side surface may be convex and the image side surface may be concave. The second lens element can have a negative power, and can have a convex object-side surface and a concave image-side surface. The third lens element can have a positive power, and can have a convex object-side surface and a concave image-side surface. The fourth lens element can have a positive power, and can have a concave object-side surface and a convex image-side surface.
In an exemplary embodiment, the fifth lens element may have a negative power, and the object-side surface thereof may be convex and the image-side surface thereof may be concave. The sixth lens element can have a positive or negative power, and can have a concave object-side surface and a convex image-side surface. The seventh lens element can have a positive power, and can have a convex object-side surface and a concave image-side surface. The eighth lens element can have a negative power, and can have a concave object-side surface and a convex image-side surface.
By controlling the focal power and the surface type of each lens in the optical imaging lens, the characteristics of a large image surface, ultra-thin and large aperture of the optical system can be ensured.
In an exemplary embodiment, the optical imaging lens of the present application may include at least one diaphragm. The diaphragm can restrict the light path and control the intensity of light. The stop may be disposed at an appropriate position as needed, for example, may be disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.
In an exemplary embodiment, the effective focal length f of the optical imaging lens may be, for example, in the range of 7.8mm to 8.9mm, the effective focal length f1 of the first lens may be, for example, in the range of 9.4mm to 10.3mm, the effective focal length f2 of the second lens may be, for example, in the range of-76.3 mm to-45.2 mm, the effective focal length f3 of the third lens may be, for example, in the range of 68.7mm to 105.4mm, the effective focal length f4 of the fourth lens may be, for example, in the range of 82.2mm to 1416.3mm, the effective focal length f5 of the fifth lens may be, for example, in the range of-64.0 mm to-37.1 mm, the effective focal length f6 of the sixth lens may be, for example, in the range of-944.3 mm to 301.6mm, the effective focal length f7 of the seventh lens may be, for example, in the range of-11.3 mm to 12.5mm, and the effective focal length f8 of the eighth lens may be, for example, in the range of-356.1.6 mm to 1.6 mm.
The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, eight lenses as described above. By reasonably distributing the focal power, the surface type, the material and the central thickness of each lens, the on-axis distance between the lenses and the like, the optical imaging lens with the characteristics of high pixel, large aperture, ultra-thin property, higher resolving power and the like can be provided, and the high demand of the market can be better met.
In the embodiment of the present application, the mirror surfaces of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens may have at least one aspherical mirror surface, that is, at least one aspherical mirror surface may be included from the object side surface of the first lens to the image side surface of the eighth lens. 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 a better curvature radius characteristic, and has advantages of improving distortion aberration and improving astigmatism 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, the seventh lens, and the eighth lens is an aspherical mirror surface. Optionally, each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens has an object-side surface and an image-side surface which are aspheric mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although eight lenses are exemplified in the embodiment, the optical imaging lens is not limited to include eight lenses. The optical imaging lens may also include other numbers of lenses, if desired.
Specific examples of an optical imaging lens applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2C. Fig. 1 shows a schematic structural diagram of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative 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 concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
Table 1 shows basic parameters of the optical imaging lens of embodiment 1, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).
TABLE 1
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the eighth lens E8 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
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. The high-order term coefficients A usable for the aspherical mirror surfaces S1 to S16 in example 1 are shown in Table 2-1 and Table 2-2 below4、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
TABLE 2-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | -1.6383E-06 | -3.6976E-06 | 5.4577E-06 | -1.0724E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | -7.8789E-06 | -9.4838E-06 | -9.3443E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 2.1643E-05 | 1.2553E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -8.4523E-05 | -9.5393E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -6.7154E-05 | -1.3234E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | 3.7653E-05 | -4.6322E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 3.6569E-05 | 6.8187E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 1.4437E-03 | 4.0138E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | -5.2218E-04 | 2.2871E-04 | 5.5803E-06 | 2.0318E-07 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S10 | -2.7764E-03 | 1.1644E-03 | 5.6550E-05 | 1.0355E-04 | -1.1833E-04 | -1.3465E-04 | -8.2116E-05 |
| S11 | -2.6007E-03 | -5.4452E-05 | -5.8650E-05 | -1.1500E-04 | 3.8233E-05 | 8.1466E-05 | 4.1180E-05 |
| S12 | -1.7006E-03 | -4.8479E-04 | -3.4880E-05 | -3.5188E-06 | -3.5636E-07 | 0.0000E+00 | 0.0000E+00 |
| S13 | 7.9262E-04 | 1.1902E-04 | 9.0662E-07 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S14 | -1.7947E-03 | 1.7659E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S15 | 4.6254E-03 | -6.5044E-03 | 2.5390E-03 | -3.3990E-04 | -6.6024E-04 | 4.2700E-04 | -6.3564E-05 |
| S16 | 1.0363E-02 | -8.5826E-04 | -6.7410E-04 | 7.1268E-04 | -7.0782E-04 | -2.7304E-04 | 1.7070E-04 |
Tables 2 to 2
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 2A to 2C, the optical imaging lens according to embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4C. 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 diagram of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative 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 concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.
Table 3 shows basic parameters of the optical imaging lens of embodiment 2, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 4-1 and 4-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 through S16 in example 24、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 3
TABLE 4-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | -7.4660E-07 | -5.1518E-06 | 4.1740E-06 | -6.7313E-07 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 3.5005E-06 | 6.6782E-07 | -5.0577E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 9.7207E-06 | 8.8162E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -6.3476E-05 | -7.3833E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -4.2811E-05 | -9.3447E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | 4.4557E-05 | 4.8241E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 1.6624E-04 | 7.9546E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 1.1198E-03 | 4.4303E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | -5.2103E-04 | 2.2030E-04 | 5.3500E-06 | 1.9468E-07 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S10 | -2.7471E-03 | 1.1148E-03 | 7.5282E-05 | 1.3698E-04 | -8.1223E-05 | -1.1259E-04 | -7.5616E-05 |
| S11 | -2.4188E-03 | -4.3817E-05 | -5.6300E-05 | -1.2960E-04 | 1.3182E-05 | 6.5380E-05 | 3.6817E-05 |
| S12 | -1.5011E-03 | -4.3974E-04 | -3.1145E-05 | -3.1158E-06 | -3.1966E-07 | 0.0000E+00 | 0.0000E+00 |
| S13 | 8.7120E-03 | 9.9498E-04 | 9.0040E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S14 | -9.2094E-04 | 4.2326E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S15 | 4.0503E-04 | -8.0743E-03 | 3.4356E-03 | -9.3468E-04 | -3.4360E-04 | 7.1876E-04 | -1.5373E-04 |
| S16 | 6.1643E-03 | -1.0984E-02 | -5.0257E-03 | -1.2749E-03 | -1.1067E-03 | 7.2893E-04 | 6.7490E-04 |
TABLE 4-2
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 4A to 4C, the optical imaging lens according to embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6C. Fig. 5 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens includes, in order from an object side to an image side along an optical axis: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative 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 concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.
Table 5 shows the basic parameters of the optical imaging lens of embodiment 3, whichIn (d), the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 6-1 and 6-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 34、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 5
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -7.6971E-02 | -3.4118E-02 | -1.2157E-02 | -3.1012E-03 | -8.6921E-04 | -3.1714E-05 | -5.2434E-05 |
| S2 | -1.6468E-01 | -7.1993E-03 | -7.2863E-03 | -5.8267E-04 | -1.2902E-04 | 6.7653E-05 | 4.8151E-05 |
| S3 | -8.8125E-02 | 2.7954E-02 | -2.0399E-03 | -6.9988E-04 | -2.9382E-04 | 8.8936E-05 | 1.2585E-04 |
| S4 | -8.0288E-03 | 1.9868E-02 | 1.5302E-03 | -1.1907E-03 | -1.1725E-03 | -5.8668E-04 | -1.3715E-04 |
| S5 | 7.1231E-03 | 3.6036E-02 | 1.4614E-02 | 2.8615E-03 | 5.7424E-05 | -4.2439E-04 | -1.5256E-04 |
| S6 | -2.8870E-02 | 1.7585E-02 | 1.0195E-02 | 2.4154E-03 | 1.2769E-03 | 2.2522E-04 | 1.8536E-04 |
| S7 | -2.7509E-01 | -4.5402E-02 | -7.1392E-03 | -1.9469E-03 | -6.8738E-04 | 4.8632E-05 | 1.2621E-04 |
| S8 | -5.0076E-01 | -4.3864E-02 | 7.7695E-03 | 8.5961E-03 | 4.8885E-03 | 5.5316E-03 | 3.4285E-03 |
| S9 | -8.6070E-01 | 4.4712E-02 | -1.4332E-02 | -1.2941E-02 | -9.4685E-05 | 2.8161E-03 | 3.4697E-03 |
| S10 | -1.1048E+00 | 1.2134E-01 | -2.2138E-03 | -1.1241E-02 | 7.7552E-03 | -1.1779E-03 | -3.4147E-04 |
| S11 | -3.4912E-01 | -1.9893E-01 | 1.3917E-01 | 7.6739E-03 | 1.1342E-02 | -7.2033E-03 | 3.9028E-04 |
| S12 | -7.9168E-01 | 1.9135E-01 | 2.6151E-02 | -2.5079E-02 | -5.4869E-03 | 6.4109E-03 | 6.8636E-03 |
| S13 | -7.0980E+00 | 1.5172E+00 | -1.1269E-01 | -6.6599E-02 | 9.1949E-03 | 1.4530E-02 | -7.1484E-03 |
| S14 | -6.2565E+00 | 4.0489E-01 | 6.3674E-02 | -4.5475E-02 | 3.2190E-02 | -1.0912E-02 | -2.0702E-04 |
| S15 | 4.0557E+00 | 1.1402E-01 | -1.7400E-01 | 5.7575E-02 | -1.4863E-02 | -3.4741E-03 | -7.9881E-04 |
| S16 | -2.8390E+00 | 6.0809E-01 | 4.9221E-02 | 5.0968E-02 | -2.7874E-02 | -1.5768E-02 | -1.2315E-02 |
TABLE 6-1
TABLE 6-2
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 6A to 6C, the optical imaging lens according to embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8C. Fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative 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 concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.
Table 7 shows basic parameters of the optical imaging lens of embodiment 4, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 8-1 and 8-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 44、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 7
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -5.8343E-02 | -2.5210E-02 | -8.7838E-03 | -2.3786E-03 | -6.2975E-04 | -7.4904E-05 | -1.4894E-05 |
| S2 | -1.2978E-01 | -1.4292E-03 | -5.0012E-03 | -8.3831E-05 | -1.3794E-04 | 3.1408E-05 | 1.1885E-05 |
| S3 | -8.5747E-02 | 2.5146E-02 | -7.2832E-04 | -1.7827E-04 | -9.9743E-05 | -2.8537E-05 | 3.3663E-05 |
| S4 | -9.9111E-03 | 1.8117E-02 | 1.6804E-03 | -3.2975E-04 | -4.2467E-04 | -3.4705E-04 | -1.7432E-04 |
| S5 | -3.7949E-03 | 2.7169E-02 | 1.0863E-02 | 2.6040E-03 | 5.2197E-04 | -5.2063E-05 | -9.0854E-05 |
| S6 | -4.8985E-02 | 8.7854E-03 | 5.2834E-03 | 1.4259E-03 | 5.2848E-04 | 2.3825E-04 | 1.0130E-04 |
| S7 | -2.7548E-01 | -5.1734E-02 | -7.4920E-03 | -2.1887E-03 | -7.7706E-04 | 8.8319E-06 | 1.0303E-04 |
| S8 | -4.3519E-01 | -5.5146E-02 | 1.1645E-02 | 5.8378E-03 | 3.6940E-03 | 3.2522E-03 | 2.2474E-03 |
| S9 | -8.3614E-01 | 4.3148E-02 | -1.3235E-02 | -1.2494E-02 | -1.4866E-03 | 1.7338E-03 | 2.4088E-03 |
| S10 | -1.0496E+00 | 1.1297E-01 | 6.6959E-04 | -1.1438E-02 | 7.1291E-03 | -2.6897E-04 | 4.0335E-04 |
| S11 | -2.9876E-01 | -2.1022E-01 | 1.1602E-01 | 3.4589E-03 | 1.1700E-02 | -5.0231E-03 | 1.8418E-03 |
| S12 | -7.9094E-01 | 1.7127E-01 | 2.8443E-02 | -2.0740E-02 | -8.2772E-03 | 3.5914E-03 | 7.4615E-03 |
| S13 | -7.1172E+00 | 1.5262E+00 | -1.1517E-01 | -6.6657E-02 | 9.4799E-03 | 1.4272E-02 | -7.0142E-03 |
| S14 | -5.9281E+00 | 4.2317E-01 | 9.8621E-02 | -6.3016E-02 | 3.7004E-02 | -1.3341E-02 | -6.3507E-04 |
| S15 | 3.6213E+00 | 1.3886E-01 | -1.6127E-01 | 5.3017E-02 | -9.6486E-03 | -2.3591E-03 | -2.4011E-03 |
| S16 | -2.8479E+00 | 5.9279E-01 | 4.6593E-02 | 4.5699E-02 | -2.2625E-02 | -1.0070E-02 | -1.2429E-02 |
TABLE 8-1
TABLE 8-2
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 8A to 8C, the optical imaging lens according to embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10C. Fig. 9 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative 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 concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.
Table 9 shows basic parameters of the optical imaging lens of embodiment 5, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 10-1 and 10-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 54、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 9
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -6.3205E-02 | -2.7670E-02 | -9.2891E-03 | -2.5099E-03 | -5.6334E-04 | -8.1193E-05 | -3.1916E-06 |
| S2 | -1.5475E-03 | -4.7316E-03 | -2.1361E-04 | -1.3600E-04 | -1.5105E-05 | 3.5134E-05 | -1.1229E-05 |
| S3 | -8.6275E-02 | 2.5846E-02 | -1.3448E-03 | -7.3741E-04 | -4.9528E-04 | -1.2495E-04 | 3.3483E-06 |
| S4 | -9.3542E-03 | 1.8938E-02 | 1.6027E-03 | -6.7806E-04 | -8.6919E-04 | -5.2179E-04 | -2.3995E-04 |
| S5 | -7.6976E-04 | 2.9963E-02 | 1.1660E-02 | 2.8646E-03 | 3.5394E-04 | -1.2765E-04 | -1.4524E-04 |
| S6 | -5.1131E-02 | 8.9929E-03 | 4.6673E-03 | 1.3531E-03 | 3.7116E-04 | 2.1627E-04 | 6.3045E-05 |
| S7 | -2.8709E-01 | -5.2124E-02 | -6.9151E-03 | -2.7921E-03 | -9.8396E-04 | -3.7830E-04 | 6.8165E-06 |
| S8 | -4.9551E-01 | -4.9584E-02 | 1.3416E-02 | 6.9013E-03 | 4.7831E-03 | 4.1373E-03 | 2.9469E-03 |
| S9 | -8.6456E-01 | 4.3671E-02 | -1.4527E-02 | -1.2829E-02 | 2.1672E-04 | 2.8049E-03 | 3.2838E-03 |
| S10 | -1.1042E+00 | 1.2034E-01 | -2.0143E-03 | -1.0723E-02 | 7.8279E-03 | -1.1471E-03 | -2.7687E-04 |
| S11 | -3.4001E-01 | -2.0217E-01 | 1.3344E-01 | 6.4936E-03 | 1.2076E-02 | -6.5834E-03 | 8.1741E-04 |
| S12 | -7.8775E-01 | 1.8559E-01 | 2.6217E-02 | -2.3923E-02 | -6.6493E-03 | 5.5180E-03 | 7.0200E-03 |
| S13 | -7.7865E+00 | 1.8436E+00 | -2.1116E-01 | -7.6985E-02 | 2.4838E-02 | 1.2054E-02 | -1.2106E-02 |
| S14 | -6.4433E+00 | 6.0729E-01 | 8.8682E-02 | -8.6187E-02 | 3.1517E-02 | -2.2539E-02 | -5.2322E-04 |
| S15 | 3.9205E+00 | 1.1780E-01 | -1.7461E-01 | 5.5778E-02 | -1.5252E-02 | -4.3531E-03 | -2.0817E-03 |
| S16 | -2.8612E+00 | 6.7492E-01 | 5.2217E-02 | 3.8642E-02 | -3.6231E-02 | -1.2870E-02 | -1.0681E-02 |
TABLE 10-1
TABLE 10-2
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 10A to 10C, the optical imaging lens according to embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12C. Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative 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 concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.
Table 11 shows basic parameters of the optical imaging lens of embodiment 6, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 12-1 and 12-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 64、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 11
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -6.2434E-02 | -2.7987E-02 | -9.7086E-03 | -2.7584E-03 | -7.1403E-04 | -7.7620E-05 | -2.0826E-05 |
| S2 | -1.3516E-01 | -1.4697E-03 | -4.9101E-03 | -4.4158E-04 | 3.6648E-04 | 1.1136E-04 | 2.4590E-04 |
| S3 | -8.5456E-02 | 2.6589E-02 | -1.4729E-03 | -1.2835E-03 | 1.8711E-04 | -1.8222E-04 | 2.1412E-04 |
| S4 | -9.8097E-03 | 1.9085E-02 | 8.6291E-04 | -1.1192E-03 | -5.4316E-04 | -6.5052E-04 | -2.0752E-04 |
| S5 | -6.4264E-04 | 2.9101E-02 | 1.1903E-02 | 3.3426E-03 | 7.6019E-04 | -1.3821E-04 | -1.4064E-04 |
| S6 | -4.6932E-02 | 7.3934E-03 | 4.3701E-03 | 1.4622E-03 | 6.4858E-04 | 2.2567E-04 | 4.7952E-05 |
| S7 | -2.8773E-01 | -5.2060E-02 | -7.5208E-03 | -2.5439E-03 | -6.6604E-04 | -3.2831E-04 | -1.2935E-04 |
| S8 | -4.7940E-01 | -5.1372E-02 | 1.4066E-02 | 5.7921E-03 | 4.4340E-03 | 2.4267E-03 | 2.2108E-03 |
| S9 | -8.6216E-01 | 4.5148E-02 | -1.4920E-02 | -1.3718E-02 | -1.0141E-03 | 8.3092E-04 | 3.3649E-03 |
| S10 | -1.1072E+00 | 1.2081E-01 | -1.2387E-04 | -1.0864E-02 | 6.5841E-03 | -2.0907E-03 | 9.9421E-04 |
| S11 | -3.4123E-01 | -2.0448E-01 | 1.3312E-01 | 6.8871E-03 | 1.3203E-02 | -5.9436E-03 | -6.5039E-04 |
| S12 | -7.9114E-01 | 1.8540E-01 | 2.6288E-02 | -2.4930E-02 | -6.0919E-03 | 6.6787E-03 | 6.9987E-03 |
| S13 | -7.7885E+00 | 1.8445E+00 | -2.0262E-01 | -7.7566E-02 | 2.4852E-02 | 1.2953E-02 | -1.2555E-02 |
| S14 | -6.4352E+00 | 6.0517E-01 | 8.3830E-02 | -8.7604E-02 | 3.0019E-02 | -2.3144E-02 | -2.5550E-03 |
| S15 | 3.9108E+00 | 1.2017E-01 | -1.7305E-01 | 5.3838E-02 | -1.5766E-02 | -4.8725E-03 | -2.5565E-03 |
| S16 | -2.8613E+00 | 6.7497E-01 | 5.2258E-02 | 3.8334E-02 | -3.6259E-02 | -1.2892E-02 | -1.0666E-02 |
TABLE 12-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 3.1409E-05 | -2.6493E-06 | 1.2611E-05 | 1.5005E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 1.2480E-04 | 7.3097E-05 | 2.7811E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 8.6436E-05 | 6.0620E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -4.7009E-05 | 9.1200E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -2.2305E-05 | 2.2999E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | 9.3949E-06 | 1.5647E-06 | -1.4694E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | -1.5199E-04 | 4.4951E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 8.2374E-04 | 1.2626E-03 | 5.1166E-04 | 4.1519E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | 1.5133E-03 | 2.9243E-03 | 1.1052E-03 | 4.9591E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S10 | -9.2120E-04 | 1.3111E-03 | -9.9427E-04 | 3.5826E-04 | 5.8943E-04 | 6.2065E-04 | 1.8181E-04 |
| S11 | -3.8112E-03 | 6.3168E-04 | 4.3726E-04 | -1.7664E-04 | -5.7971E-04 | -2.9698E-04 | -4.1588E-05 |
| S12 | -2.6164E-03 | 5.4139E-04 | 9.8310E-04 | 5.9385E-04 | -8.6582E-05 | 0.0000E+00 | 0.0000E+00 |
| S13 | 2.1176E-03 | 7.3508E-04 | -7.7089E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S14 | -1.2422E-03 | 3.8383E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S15 | 7.1939E-03 | -6.0140E-03 | 2.2080E-03 | 8.4690E-04 | -8.0439E-04 | 6.1240E-04 | -4.3666E-05 |
| S16 | 1.1204E-02 | -1.3298E-03 | -8.8311E-04 | 5.0284E-04 | -8.8755E-04 | -2.4549E-04 | 2.1268E-04 |
TABLE 12-2
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 12A to 12C, the optical imaging lens according to embodiment 6 can achieve good imaging quality.
Example 7
An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14C. Fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application.
As shown in fig. 13, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative 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 concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.
Table 13 shows basic parameters of the optical imaging lens of embodiment 7, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 14-1 and 14-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 74、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -6.3093E-02 | -2.7568E-02 | -9.4354E-03 | -2.3495E-03 | -3.8369E-04 | 1.6075E-04 | 1.8468E-04 |
| S2 | -1.3512E-01 | -1.9994E-03 | -4.6739E-03 | 7.5465E-05 | 2.1238E-04 | 1.7993E-04 | 2.0446E-04 |
| S3 | -8.5437E-02 | 2.6689E-02 | -1.3405E-03 | -4.5190E-04 | -2.9137E-04 | -1.2933E-04 | 2.1350E-05 |
| S4 | -9.8329E-03 | 1.8735E-02 | 1.2891E-03 | -7.0598E-04 | -8.5690E-04 | -6.9599E-04 | -3.4066E-04 |
| S5 | -1.2909E-03 | 2.9629E-02 | 1.2069E-02 | 3.0700E-03 | 5.1234E-04 | -1.7980E-04 | -1.7700E-04 |
| S6 | -5.0333E-02 | 9.2776E-03 | 4.9672E-03 | 1.6257E-03 | 5.5670E-04 | 3.0581E-04 | 9.2903E-05 |
| S7 | -2.9220E-01 | -5.2256E-02 | -8.1182E-03 | -2.0687E-03 | -7.5100E-04 | 1.1235E-04 | 1.5966E-04 |
| S8 | -4.6801E-01 | -5.0109E-02 | 1.1786E-02 | 7.8026E-03 | 4.7082E-03 | 4.1193E-03 | 2.5621E-03 |
| S9 | -8.6304E-01 | 4.4106E-02 | -1.5251E-02 | -1.2443E-02 | 1.6067E-04 | 2.8738E-03 | 2.9042E-03 |
| S10 | -1.1024E+00 | 1.2096E-01 | -1.1713E-03 | -1.1190E-02 | 7.6267E-03 | -1.2508E-03 | -3.8547E-04 |
| S11 | -3.3465E-01 | -2.0271E-01 | 1.3442E-01 | 5.8277E-03 | 1.2474E-02 | -6.3472E-03 | 8.0809E-04 |
| S12 | -7.9086E-01 | 1.8586E-01 | 2.6873E-02 | -2.3866E-02 | -6.6411E-03 | 4.8144E-03 | 7.0109E-03 |
| S13 | -7.7895E+00 | 1.8446E+00 | -2.0900E-01 | -7.7297E-02 | 2.3997E-02 | 1.1945E-02 | -1.1348E-02 |
| S14 | -6.4397E+00 | 5.8749E-01 | 9.8048E-02 | -8.0672E-02 | 3.0421E-02 | -2.6136E-02 | -3.3068E-03 |
| S15 | 3.9172E+00 | 1.2119E-01 | -1.7231E-01 | 5.6157E-02 | -1.3705E-02 | -3.8655E-03 | -1.1890E-03 |
| S16 | -2.8977E+00 | 6.7016E-01 | 4.8272E-02 | 3.7758E-02 | -3.4293E-02 | -1.5402E-02 | -7.9733E-03 |
TABLE 14-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 1.7162E-04 | 1.0470E-04 | 6.2473E-05 | 2.1886E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 9.6014E-05 | 6.6496E-05 | 1.1235E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 1.4927E-05 | 5.0333E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -1.3388E-04 | -3.7034E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -8.6866E-05 | -9.4551E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | 5.6020E-05 | 6.7810E-06 | 4.9273E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 1.7393E-04 | 8.9074E-05 | 4.7668E-05 | 2.1095E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 8.7676E-04 | 3.3080E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | -4.4098E-04 | 3.5282E-04 | 1.0653E-04 | 1.6800E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S10 | -2.2571E-03 | 1.2980E-03 | 1.1948E-04 | 1.1790E-04 | -1.8534E-04 | -3.3704E-05 | -2.4268E-05 |
| S11 | -2.0706E-03 | 1.9395E-04 | 1.4652E-04 | 1.9474E-04 | 2.1114E-05 | -6.1567E-06 | 2.9223E-05 |
| S12 | -1.3950E-03 | -5.7681E-04 | -1.2603E-04 | 3.1333E-04 | 1.3278E-05 | 0.0000E+00 | 0.0000E+00 |
| S13 | 2.4930E-03 | 8.0481E-04 | -1.1716E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S14 | -2.2116E-03 | 3.8365E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S15 | 4.4974E-03 | -5.4407E-03 | 2.1203E-03 | 2.2651E-04 | -4.4659E-04 | 1.7609E-04 | 1.2894E-04 |
| S16 | 1.2777E-02 | -3.4983E-03 | -6.2154E-04 | 1.4203E-04 | -2.3774E-04 | 1.9650E-04 | 7.4429E-04 |
TABLE 14-2
Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 7. Fig. 14C shows a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 14A to 14C, the optical imaging lens according to embodiment 7 can achieve good imaging quality.
Example 8
An optical imaging lens according to embodiment 8 of the present application is described below with reference to fig. 15 to 16C. Fig. 15 shows a schematic structural diagram of an optical imaging lens according to embodiment 8 of the present application.
As shown in fig. 15, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative 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 concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.
Table 15 shows the basic parameters of the optical imaging lens of embodiment 8, whichIn (d), the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 16-1 and 16-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 84、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 16-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 2.2281E-05 | 2.4011E-06 | 7.3404E-06 | -3.7949E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | -6.3686E-07 | 1.1266E-05 | 1.3562E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 5.4814E-06 | 2.2450E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -4.1495E-05 | 1.3135E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -3.7316E-05 | -2.6065E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | 3.0951E-05 | 1.0654E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 7.6258E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 6.7827E-04 | 2.2201E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | -9.1673E-04 | -8.0063E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S10 | -2.2234E-03 | 7.3465E-04 | 2.4071E-04 | 2.2713E-04 | 9.9313E-05 | 1.4782E-05 | 2.4461E-06 |
| S11 | -2.4335E-03 | -3.5813E-04 | -1.6843E-04 | 1.3699E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S12 | -1.9788E-04 | 1.5312E-04 | -1.0762E-04 | 5.6573E-04 | -9.1054E-06 | 0.0000E+00 | 0.0000E+00 |
| S13 | 2.2962E-03 | 3.0042E-04 | 2.4691E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S14 | -2.0041E-03 | 3.8118E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S15 | 4.0824E-03 | -6.5083E-03 | 2.0353E-03 | -1.0440E-04 | -9.8770E-04 | 4.1308E-04 | -1.8901E-04 |
| S16 | 1.2982E-02 | -3.9210E-03 | -3.4643E-03 | 4.0668E-04 | -1.1375E-03 | -5.2319E-04 | 1.5459E-04 |
TABLE 16-2
Fig. 16A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 8, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 16B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 8. Fig. 16C shows a distortion curve of the optical imaging lens of embodiment 8, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 16A to 16C, the optical imaging lens according to embodiment 8 can achieve good imaging quality.
Further, in embodiments 1 to 8, the effective focal length values f1 to f8 of the respective lenses, the effective focal length f of the optical imaging lens, the distance TTL along the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, half ImgH of the diagonal length of the effective pixel region on the imaging surface, half Semi-FOV of the maximum angle of view of the optical imaging lens, and the ratio f/EPD of the effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens are as shown in table 17.
TABLE 17
The conditional expressions in examples 1 to 8 satisfy the conditions shown in table 18, respectively.
| Conditions/examples | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| TTL/ImgH | 1.10 | 1.18 | 1.16 | 1.23 | 1.23 | 1.22 | 1.20 | 1.26 |
| Ff/Fs | -0.27 | -0.28 | -0.26 | -0.32 | -0.30 | -0.28 | -0.29 | -0.21 |
| f5/(f1+f2) | 1.24 | 0.58 | 1.11 | 0.97 | 1.44 | 1.24 | 1.14 | 1.03 |
| f4/(f3+f4) | 0.69 | 0.54 | 0.71 | 0.44 | 0.93 | 0.72 | 0.60 | 0.57 |
| (f7+f8)/f | 0.75 | 0.74 | 0.75 | 0.64 | 0.55 | 0.56 | 0.57 | 0.54 |
| R13/R14 | 0.60 | 0.60 | 0.60 | 0.58 | 0.58 | 0.58 | 0.57 | 0.58 |
| |(avFp+avFn)|/(avFp-avFn) | 0.43 | 0.37 | 0.41 | 0.61 | 0.49 | 0.46 | 0.41 | 0.56 |
| (R11+R12)/(R9+R10) | -0.58 | -0.42 | -0.63 | -0.67 | -0.56 | -0.57 | -0.58 | -0.50 |
| (R1+R2)/(R3+R4) | 1.35 | 1.27 | 1.31 | 1.43 | 1.40 | 1.39 | 1.36 | 1.37 |
| ΣCTf/CT1 | 2.52 | 2.77 | 2.53 | 2.63 | 2.58 | 2.58 | 2.59 | 2.57 |
| ΣCTs/ΣATs | 0.83 | 0.84 | 0.83 | 0.85 | 0.84 | 0.85 | 0.78 | 1.09 |
| CT7/T78 | 0.40 | 0.39 | 0.40 | 0.36 | 0.31 | 0.32 | 0.32 | 0.35 |
| DT62/DT71 | 0.71 | 0.66 | 0.69 | 0.67 | 0.90 | 0.70 | 0.68 | 0.72 |
| f34/f56 | -0.71 | -0.82 | -0.70 | -1.04 | -1.74 | -1.37 | -1.28 | -1.19 |
| (ET5+ET6)/(ET7+ET8) | 0.76 | 0.68 | 0.81 | 0.92 | 1.25 | 0.86 | 1.03 | 0.57 |
| SAG71/SAG72 | 0.63 | 0.53 | 0.62 | 0.65 | 0.77 | 0.75 | 0.70 | 0.79 |
The present application also provides an imaging Device, which is provided with an electron sensing element to form an image, wherein the electron sensing element may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (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 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 protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the scope of the present application. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (18)
1. An optical imaging lens comprising a first lens group and a second lens group, the first lens group comprising: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, the second lens group including: a sixth lens element, a seventh lens element, and an eighth lens element;
the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element are sequentially arranged from an object side to an image side along an optical axis;
the second lens has negative focal power, and the object side surface of the sixth lens is a concave surface;
the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfies: ImgH >8 mm;
the distance TTL from the object side surface of the first lens to the imaging surface along the optical axis and the half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy that: TTL/ImgH < 1.3;
the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the following conditions: f/EPD < 1.9; and
an effective focal length Ff of the first lens group and an effective focal length Fs of the second lens group satisfy: -0.5< Ff/Fs <0.
2. The optical imaging lens according to claim 1, wherein the abbe number V1 of the first lens satisfies:
V1>60。
3. the optical imaging lens of claim 1, wherein the effective focal length f5 of the fifth lens, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens satisfy:
0.5<f5/(f1+f2)<2.0。
4. the optical imaging lens of claim 1, wherein the effective focal length f4 of the fourth lens and the effective focal length f3 of the third lens satisfy:
0<f4/(f3+f4)<1.0。
5. the optical imaging lens of claim 1, wherein the effective focal length f7 of the seventh lens and the effective focal length f8 of the eighth lens satisfy:
0<(f7+f8)/f<1.0。
6. the optical imaging lens of claim 1, wherein the radius of curvature R13 of the object-side surface of the seventh lens and the radius of curvature R14 of the image-side surface of the seventh lens satisfy:
0.3<R13/R14<1.0。
7. the optical imaging lens according to claim 1, wherein an average value avFp of the effective focal lengths of all the lenses having positive optical power of the first to eighth lenses and an average value avFn of the effective focal lengths of all the lenses having negative optical power of the first to eighth lenses satisfy:
0<|(avFp+avFn)|/(avFp-avFn)<1.0。
8. the optical imaging lens assembly of claim 1, wherein the radius of curvature of the object-side surface of the sixth lens R11, the radius of curvature of the image-side surface of the sixth lens R12, the radius of curvature of the object-side surface of the fifth lens R9, and the radius of curvature of the image-side surface of the fifth lens R10 satisfy:
-1.0<(R11+R12)/(R9+R10)<0。
9. the optical imaging lens of claim 1, wherein 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, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens satisfy:
1.0<(R1+R2)/(R3+R4)<2.0。
10. the optical imaging lens according to claim 1, wherein a sum Σ CTf of center thicknesses on the optical axis of the respective lenses included in the first lens group and a center thickness CT1 of the first lens on the optical axis satisfy:
2.0<ΣCTf/CT1<3.0。
11. the optical imaging lens according to claim 1, wherein a sum Σ CTs of center thicknesses on the optical axis of the respective lenses included in the second lens group and a sum Σ ATs of separation distances on the optical axis of any two adjacent lenses among the respective lenses included in the second lens group satisfy:
0.5<ΣCTs/ΣATs<1.5。
12. the optical imaging lens according to any one of claims 1 to 11, wherein a center thickness CT7 of the seventh lens on the optical axis and a separation distance T78 of the seventh lens and the eighth lens on the optical axis satisfy:
0<CT7/T78<0.5。
13. the optical imaging lens according to any one of claims 1 to 11, wherein a maximum effective radius DT62 of an image side surface of the sixth lens and a maximum effective radius DT71 of an object side surface of the seventh lens satisfy:
0.3<DT62/DT71<1.3。
14. the optical imaging lens according to any one of claims 1 to 11, characterized in that a combined focal length f34 of the third lens and the fourth lens and a combined focal length f56 of the fifth lens and the sixth lens satisfy:
-2.0<f34/f56<-0.5。
15. the optical imaging lens according to any one of claims 1 to 11, characterized in that the edge thickness ET5 of the fifth lens, the edge thickness ET6 of the sixth lens, the edge thickness ET7 of the seventh lens and the edge thickness ET8 of the eighth lens satisfy:
0.5<(ET5+ET6)/(ET7+ET8)<1.5。
16. the optical imaging lens according to any one of claims 1 to 11, wherein an on-axis distance from an intersection point of an object-side surface of the seventh lens and the optical axis to an effective radius vertex of the object-side surface of the seventh lens SAG71, and an intersection point of an image-side surface of the seventh lens and the optical axis to an effective radius vertex of the image-side surface of the seventh lens SAG72 satisfy:
0.3<SAG71/SAG72<1.3。
17. the optical imaging lens according to any one of claims 1 to 11,
the first lens has positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;
the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;
the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; and
the fourth lens has positive focal power, and the object side surface of the fourth lens is a concave surface while the image side surface of the fourth lens is a convex surface.
18. The optical imaging lens according to any one of claims 1 to 11,
the fifth lens has negative focal power, the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface;
the sixth lens has focal power, and the image side surface of the sixth lens is a convex surface;
the seventh lens has positive focal power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; and
the eighth lens element has a negative focal power, and has a concave object-side surface and a convex image-side surface.
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