CN109407278B - Imaging lens - Google Patents

Imaging lens Download PDF

Info

Publication number
CN109407278B
CN109407278B CN201811502929.9A CN201811502929A CN109407278B CN 109407278 B CN109407278 B CN 109407278B CN 201811502929 A CN201811502929 A CN 201811502929A CN 109407278 B CN109407278 B CN 109407278B
Authority
CN
China
Prior art keywords
lens
imaging
imaging lens
image
optical axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811502929.9A
Other languages
Chinese (zh)
Other versions
CN109407278A (en
Inventor
丁玲
吕赛锋
闻人建科
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Sunny Optics Co Ltd
Original Assignee
Zhejiang Sunny Optics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Sunny Optics Co Ltd filed Critical Zhejiang Sunny Optics Co Ltd
Priority to CN201811502929.9A priority Critical patent/CN109407278B/en
Publication of CN109407278A publication Critical patent/CN109407278A/en
Application granted granted Critical
Publication of CN109407278B publication Critical patent/CN109407278B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

Landscapes

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

Abstract

The application discloses an imaging lens, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens with focal power from an object side to an image side along an optical axis. Wherein the first lens has positive optical power; the third lens has negative focal power; the seventh lens has negative focal power; at least one of the first to seventh lenses has an aspherical surface that is non-rotationally symmetrical. The effective focal length fx of the imaging lens in the X-axis direction and the entrance pupil diameter EPDx of the imaging lens in the X-axis direction meet the condition that fx/EPDx is less than 1.9; and an effective focal length fy of the imaging lens in the Y-axis direction and an entrance pupil diameter EPDy of the imaging lens in the Y-axis direction satisfy fy/EPDy < 1.9.

Description

Imaging lens
Technical Field
The present application relates to an imaging lens, and more particularly, to an imaging lens including seven lenses.
Background
With rapid updating of products such as mobile phones, computers and tablets, the requirements of the market on imaging lenses carried on the products are also increasing. In addition to requiring a lens with excellent imaging quality, high resolution, small size, and large aperture are also required. However, currently, the mainstream lenses on the market generally employ rotationally symmetrical (axisymmetric) aspherical surfaces as their planar structures. Such rotationally symmetrical aspheres can be seen as a curve in the meridian plane that is rotated 360 ° about the optical axis, and thus have sufficient degrees of freedom in the meridian plane only, which is advantageous for correcting the system's meridional aberrations, but does not correct the off-axis aberrations well.
Disclosure of Invention
The present application provides an imaging lens applicable to a portable electronic product, which at least solves or partially solves at least one of the above-mentioned drawbacks of the prior art.
In one aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the seventh lens may have negative optical power; and at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical. Wherein, the effective focal length fx of the imaging lens in the X-axis direction and the entrance pupil diameter EPDx of the imaging lens in the X-axis direction can meet fx/EPDx < 1.9; and the effective focal length fy of the imaging lens in the Y-axis direction and the entrance pupil diameter EPDy of the imaging lens in the Y-axis direction can satisfy that fy/EPDy is less than 1.9.
In one embodiment, the effective focal length fx of the imaging lens in the X-axis direction and the effective focal length fy of the imaging lens in the Y-axis direction may satisfy 0.8 < fx/fy < 1.2.
In one embodiment, the effective focal length f3 of the third lens and the effective focal length f7 of the seventh lens may satisfy 0.5 < f3/f7 < 1.5.
In one embodiment, the object-side surface of the seventh lens element may be convex and the image-side surface may be concave.
In one embodiment, the image-side surface of the third lens may be concave; and the curvature radius R14 of the image side of the seventh lens and the curvature radius R6 of the image side of the third lens can satisfy 0.2 < R14/R6 < 0.7.
In one embodiment, the image side surface of the sixth lens may be concave.
In one embodiment, the effective focal length f1 of the first lens, the radius of curvature R1 of the object-side surface of the first lens, and the radius of curvature R2 of the image-side surface of the first lens may satisfy 0.5 < f 1/(r1+r2) < 1.5.
In one embodiment, the radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens and the effective focal length f2 of the second lens may satisfy 2 < (R3-R4)/f 2 < 2.8.
In one embodiment, the edge thickness ET6 of the sixth lens and the edge thickness ET7 of the seventh lens may satisfy 0.9 < ET6/ET7 < 1.6.
In one embodiment, the effective half-aperture DT41 of the object-side surface of the fourth lens element, the effective half-aperture DT51 of the object-side surface of the fifth lens element, and half of the diagonal length ImgH of the effective pixel region on the imaging surface of the imaging lens may satisfy 0.5 < (dt41+dt51)/ImgH < 0.8.
In one embodiment, the distance T34 between the third lens and the fourth lens, the distance T67 between the sixth lens and the seventh lens, and the distance T56 between the fifth lens and the sixth lens may satisfy 1.4 < (t34+t67)/t56 < 2.5.
In one embodiment, the center thickness CT2 of the second lens, the center thickness CT4 of the fourth lens, the center thickness CT5 of the fifth lens and the center thickness CT6 of the sixth lens may satisfy 1.1 < (CT 2+ CT4+ CT 5)/CT 6 < 1.6.
In one embodiment, the full field angle FOV of the imaging lens may satisfy 70 ° < FOV < 90 °.
In one embodiment, the imaging lens further includes a diaphragm, and the distance SL between the diaphragm and the imaging surface of the imaging lens and the distance TTL between the object side surface of the first lens and the imaging surface of the imaging lens on the optical axis may satisfy 0.8 < SL/TTL <1.
In one embodiment, a distance TTL between an object side surface of the first lens and an imaging surface of the imaging lens on an optical axis and a half of a diagonal length ImgH of an effective pixel area on the imaging surface of the imaging lens may satisfy TTL/ImgH < 1.6.
In another aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the seventh lens may have negative optical power; and at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical. The effective focal length fx of the imaging lens in the X-axis direction and the effective focal length fy of the imaging lens in the Y-axis direction can meet 0.8 < fx/fy < 1.2.
In still another aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the seventh lens may have negative optical power; and at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical. The effective focal length f3 of the third lens and the effective focal length f7 of the seventh lens can satisfy 0.5 < f3/f7 < 1.5.
In still another aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the image side surface of the sixth lens element may be concave; the seventh lens may have negative optical power, an object-side surface thereof may be convex, and an image-side surface thereof may be concave, wherein at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical.
In still another aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the seventh lens may have negative optical power; and at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical. The curvature radius R14 of the image side of the seventh lens and the curvature radius R6 of the image side of the third lens can satisfy 0.2 < R14/R6 < 0.7.
In still another aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the seventh lens may have negative optical power; and at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical. The effective focal length f1 of the first lens element, the radius of curvature R1 of the object-side surface of the first lens element and the radius of curvature R2 of the image-side surface of the first lens element may satisfy 0.5 < f 1/(r1+r2) < 1.5.
In still another aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the seventh lens may have negative optical power; and at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical. The radius of curvature R3 of the object side surface of the second lens, the radius of curvature R4 of the image side surface of the second lens and the effective focal length f2 of the second lens can satisfy 2 < (R3-R4)/f 2 < 2.8.
In still another aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the seventh lens may have negative optical power; and at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical. Wherein, the edge thickness ET6 of the sixth lens and the edge thickness ET7 of the seventh lens can satisfy 0.9 < ET6/ET7 < 1.6.
In still another aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the seventh lens may have negative optical power; and at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical. The effective half caliber DT41 of the object side surface of the fourth lens, the effective half caliber DT51 of the object side surface of the fifth lens and half ImgH of the diagonal length of the effective pixel area on the imaging surface of the imaging lens can meet the condition that (DT 41+DT 51)/ImgH is less than 0.8.
In still another aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the seventh lens may have negative optical power; and at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical. Wherein, the interval distance T34 between the third lens and the fourth lens on the optical axis, the interval distance T67 between the sixth lens and the seventh lens on the optical axis and the interval distance T56 between the fifth lens and the sixth lens on the optical axis can satisfy 1.4 < (T34+T67)/T56 < 2.5.
In still another aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the seventh lens may have negative optical power; and at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical. The center thickness CT2 of the second lens, the center thickness CT4 of the fourth lens, the center thickness CT5 of the fifth lens and the center thickness CT6 of the sixth lens can satisfy 1.1 < (CT2+CT4+CT5)/CT 6 < 1.6.
In still another aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the seventh lens may have negative optical power; and at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical. Wherein the full field angle FOV of the imaging lens can satisfy 70 DEG < FOV < 90 deg.
In still another aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the seventh lens may have negative optical power; and at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical. The imaging lens further comprises a diaphragm, and the distance SL between the diaphragm and the imaging surface of the imaging lens on the optical axis and the distance TTL between the object side surface of the first lens and the imaging surface of the imaging lens on the optical axis can meet the condition that SL/TTL is more than 0.8 and less than 1.
In still another aspect, the present application provides an imaging lens including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power. Wherein the first lens may have positive optical power; the third lens may have negative optical power; the seventh lens may have negative optical power; and at least one of the first to seventh lenses may have an aspherical surface that is non-rotationally symmetrical. The distance TTL between the object side surface of the first lens and the imaging surface of the imaging lens on the optical axis and half of the diagonal line length of the effective pixel area on the imaging surface of the imaging lens can meet the condition that TTL/ImgH is smaller than 1.6.
The application adopts a plurality of (e.g. seven) lenses, and the imaging lens has at least one beneficial effect of small size, large aperture, high resolution and the like by reasonably distributing the focal power, the surface type, the center thickness of each lens, the axial spacing between each lens and the like. In addition, by introducing the non-rotationally symmetrical aspheric surface, the off-axis meridian aberration and the sagittal aberration of the imaging lens are corrected simultaneously, so that the improvement of the image quality is further obtained.
Drawings
Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic configuration diagram of an imaging lens according to embodiment 1 of the present application;
fig. 2 schematically illustrates a case where the RMS spot diameter of the imaging lens of embodiment 1 is within the first quadrant;
fig. 3 shows a schematic configuration diagram of an imaging lens according to embodiment 2 of the present application;
FIG. 4 schematically illustrates the RMS spot diameter of the imaging lens of example 2 in the first quadrant;
fig. 5 shows a schematic structural diagram of an imaging lens according to embodiment 3 of the present application;
FIG. 6 schematically illustrates the RMS spot diameter of the imaging lens of example 3 in the first quadrant;
fig. 7 shows a schematic structural diagram of an imaging lens according to embodiment 4 of the present application;
FIG. 8 schematically illustrates the RMS spot diameter of the imaging lens of example 4 in the first quadrant;
fig. 9 shows a schematic configuration diagram of an imaging lens according to embodiment 5 of the present application;
fig. 10 schematically illustrates a case where the RMS spot diameter of the imaging lens of embodiment 5 is in the first quadrant;
fig. 11 shows a schematic structural view of an imaging lens according to embodiment 6 of the present application;
FIG. 12 schematically illustrates the RMS spot diameter of the imaging lens of example 6 in the first quadrant;
fig. 13 shows a schematic structural view of an imaging lens according to embodiment 7 of the present application;
fig. 14 schematically illustrates a case where the RMS spot diameter of the imaging lens of embodiment 7 is in the first quadrant;
fig. 15 shows a schematic structural view of an imaging lens according to embodiment 8 of the present application;
fig. 16 schematically illustrates a case where the RMS spot diameter of the imaging lens of embodiment 8 is in the first quadrant;
fig. 17 shows a schematic configuration diagram of an imaging lens according to embodiment 9 of the present application;
Fig. 18 schematically shows a case where the RMS spot diameter of the imaging lens of embodiment 9 is in the first quadrant;
Fig. 19 shows a schematic structural view of an imaging lens according to embodiment 10 of the present application;
FIG. 20 schematically illustrates the RMS spot diameter of the imaging lens of embodiment 10 within the first quadrant;
fig. 21 shows a schematic structural view of an imaging lens according to embodiment 11 of the present application;
fig. 22 schematically shows a case where the RMS spot diameter of the imaging lens of embodiment 11 is in the first quadrant.
Detailed Description
For a better understanding of the application, various aspects of the 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 application and is not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. In each lens, the surface closest to the subject is referred to as the subject side of the lens; in each lens, the surface closest to the imaging plane is referred to as the image side of the lens.
Herein, we define a direction parallel to the optical axis as a Z-axis direction, a direction perpendicular to the Z-axis and lying in the meridian plane of the central field of view as a Y-axis direction, and a direction perpendicular to the Z-axis and lying in the sagittal plane of the central field of view as an X-axis direction. Unless otherwise specified, each parameter symbol herein except for a parameter symbol related to a field of view represents a characteristic parameter value in the Y-axis direction of the imaging lens. For example, unless otherwise specified, R14 in the conditional expression "R14/R6" represents a radius of curvature in the Y-axis direction of the image side surface of the seventh lens, and R6 represents a radius of curvature in the Y-axis direction of the image side surface of the third lens.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the 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, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The features, principles, and other aspects of the present application are described in detail below.
The imaging lens according to the exemplary embodiment of the present application may include, for example, seven lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The seven lenses are sequentially arranged from the object side to the image side along the optical axis, and each adjacent lens can have an air space therebetween.
In an exemplary embodiment, the first lens may have positive optical power; the second lens has optical power; the third lens may have negative optical power; the fourth lens has optical power; the fifth lens has optical power; the sixth lens has optical power; the seventh lens may have negative optical power. The focal power of each lens is reasonably configured, so that the spherical aberration and chromatic aberration of an optical system can be effectively reduced, the focal power can be prevented from being excessively concentrated on a single lens, the sensitivity of the lens can be further effectively reduced, and more loose tolerance conditions are provided for an actual manufacturing process.
In an exemplary embodiment, the image quality may be further improved by setting the object side surface and/or the image side surface of at least one of the first to seventh lenses to be an aspherical surface that is non-rotationally symmetrical. The non-rotationally symmetrical aspheric surface is a free-form surface, and the non-rotationally symmetrical component is added on the basis of the rotationally symmetrical aspheric surface, so that the introduction of the non-rotationally symmetrical aspheric surface in the lens system is beneficial to effectively correcting off-axis meridian aberration and sagittal aberration, and greatly improving the performance of the optical system. The imaging lens according to the present application may include at least one non-rotationally symmetrical aspherical surface, for example, one non-rotationally symmetrical aspherical surface, two non-rotationally symmetrical aspherical surfaces, three non-rotationally symmetrical aspherical surfaces, or a plurality of non-rotationally symmetrical aspherical surfaces. Alternatively, the object side surface of the first lens may be an aspherical surface that is non-rotationally symmetrical.
In an exemplary embodiment, the image side surface of the sixth lens may be concave; the object-side surface of the seventh lens element may be convex, and the image-side surface thereof may be concave. The surface shapes of the sixth lens and the seventh lens are reasonably configured, so that the incidence angle and the emergence angle of light rays in the seventh lens are reduced, and the matching property of the principal ray angle of the lens and the chip can be improved; in addition, the generation of total reflection ghost images of the seventh lens due to overlarge light deflection angle can be avoided effectively.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression fi/EPDi < 1.9, where i is x or y. When i is X, fx is the effective focal length of the imaging lens in the X-axis direction, EPDx is the entrance pupil diameter of the imaging lens in the X-axis direction, and fx/EPDx is less than 1.9. When i is Y, fy is the effective focal length of the imaging lens in the Y-axis direction, EPDy is the entrance pupil diameter of the imaging lens in the Y-axis direction, and fy/EPDy is less than 1.9. More specifically, fx and EPDx may further satisfy 1.58. Ltoreq.fi/EPDi. Ltoreq.1.85, and fy and EPDy may further satisfy 1.58. Ltoreq.fi/EPDi. Ltoreq.1.85. The condition fi/EPDi is smaller than 1.9, the characteristic of large aperture of the system can be ensured, the illumination of the edge view field can be enhanced, and the lens can be ensured to have good shooting effect in the dark environment.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0.8< fx/fy < 1.2, where fx is an effective focal length in an X-axis direction of the imaging lens and fy is an effective focal length in a Y-axis direction of the imaging lens. More specifically, fx and fy may further satisfy 0.89. Ltoreq.fx/fy. Ltoreq.1.15. The effective focal length of the imaging lens in the X-axis direction and the Y-axis direction is reasonably controlled, and meridian and sagittal astigmatism, spherical aberration and coma aberration can be reduced simultaneously.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional 70 ° < FOV < 90 °, where FOV is the full field angle of the imaging lens. More specifically, the FOV may further satisfy 70 ° < FOV < 85 °, e.g., 72.9+.FOV+.80.2 °. The visual angle of the imaging lens is reasonably controlled, so that the system can have good imaging quality under a wider visual field, and the phenomenon that the illuminance of an edge visual field is low can be avoided.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0.5 < f3/f7 < 1.5, where f3 is an effective focal length of the third lens and f7 is an effective focal length of the seventh lens. More specifically, f3 and f7 may further satisfy 0.52.ltoreq.f3/f7.ltoreq.1.36. The effective focal lengths of the third lens and the seventh lens are reasonably controlled, and the high-level coma generated by the third lens and the seventh lens can be effectively balanced.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0.5 < f 1/(r1+r2) < 1.5, where f1 is an effective focal length of the first lens, R1 is a radius of curvature of an object side surface of the first lens, and R2 is a radius of curvature of an image side surface of the first lens. More specifically, f1, R1 and R2 may further satisfy 0.60.ltoreq.f1/(R1+R2). Ltoreq.1.28. Satisfies the condition that f 1/(R1+R2) < 1.5, not only can effectively converge light, but also can avoid overlarge deflection angle of the light in the first lens and reduce the sensitivity of the lens. Alternatively, the object-side surface of the first lens may be convex, and the image-side surface may be concave.
In an exemplary embodiment, the imaging lens of the present application may satisfy the condition that TTL/ImgH is less than 1.6, where TTL is a distance between an object side surface of the first lens and an imaging surface of the imaging lens on an optical axis, and ImgH is a half of a diagonal length of an effective pixel area on the imaging surface of the imaging lens. More specifically, TTL and ImgH can further satisfy 1.3 < TTL/ImgH < 1.6, e.g., 1.44. Ltoreq.TTL/ImgH. Ltoreq.1.55. The ratio of TTL to ImgH is reasonably controlled, and under the condition of shortening the lens length, the system can be ensured to have a large enough image plane, so that more details of a shot object can be presented.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0.2 < R14/R6 < 0.7, where R14 is a radius of curvature of an image side of the seventh lens element and R6 is a radius of curvature of an image side of the third lens element. More specifically, R14 and R6 may further satisfy 0.29.ltoreq.R14/R6.ltoreq.0.61. The curvature radius of the image side surface of the third lens and the curvature radius of the image side surface of the seventh lens are reasonably distributed, so that the deflection of light rays on the image side surface of the third lens and the image side surface of the seventh lens can be effectively alleviated, and the total reflection ghost images generated by overlarge deflection angles can be avoided. Alternatively, the image side surface of the third lens may be concave.
In an exemplary embodiment, the imaging lens may further include a diaphragm to improve the imaging quality of the lens. Alternatively, a diaphragm may be provided between the object side and the first lens.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0.8 < SL/TTL < 1, where SL is a distance between the stop and the imaging surface of the imaging lens on the optical axis, and TTL is a distance between the object side surface of the first lens and the imaging surface of the imaging lens on the optical axis. More specifically, SL and TTL may further satisfy 0.94. Ltoreq.SL/TTL.ltoreq.0.98. The ratio range of SL to TTL is reasonably controlled, so that the system can be ensured to have smaller size, and light rays with poor imaging quality can be blocked while the illuminance of an off-axis field is ensured, thereby effectively improving the overall imaging quality.
In an exemplary embodiment, the imaging lens of the present application may satisfy the condition of 1.1 < (CT 2+ CT4+ CT 5)/CT 6 < 1.6, wherein CT2 is the center thickness of the second lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis. More specifically, CT2, CT4, CT5 and CT6 may further satisfy 1.24.ltoreq.Ct2+Ct4+Ct5)/CT 6.ltoreq.1.49. The lens size can be shortened under the condition that the condition 1.1 < (CT 2+ CT4+ CT 5)/CT 6 < 1.6 is satisfied, and the lens size can be shortened under the condition that the manufacturability of the second lens, the fourth lens, the fifth lens and the sixth lens is ensured, in addition, the deflection of light rays in the lenses can be slowed down, and the total reflection ghost images generated due to larger deflection angles can be effectively avoided.
In an exemplary embodiment, the imaging lens of the present application may satisfy the condition that (t34+t67)/t56 < 2.5, where T34 is a distance between the third lens and the fourth lens on the optical axis, T67 is a distance between the sixth lens and the seventh lens on the optical axis, and T56 is a distance between the fifth lens and the sixth lens on the optical axis. More specifically, T34, T67 and T56 may further satisfy 1.47.ltoreq.T34+T67)/T56.ltoreq.2.49. Satisfying the condition 1.4 < (t34+t67)/t56 < 2.5 contributes to reducing the incidence angles of light rays in the fourth lens, the sixth lens, and the seventh lens, and to reducing the sensitivities of the fourth lens, the sixth lens, and the seventh lens.
In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0.9 < ET6/ET7 < 1.6, where ET6 is an edge thickness of the sixth lens and ET7 is an edge thickness of the seventh lens. More specifically, ET6 and ET7 may further satisfy 0.97.ltoreq.ET 6/ET 7.ltoreq.1.54. The edge thicknesses of the sixth lens and the seventh lens are reasonably configured, so that the sixth lens and the seventh lens are easy to machine and shape and are easy to assemble and cooperate with the lens barrel, deflection of an edge view field can be alleviated, and matching of a principal ray angle of the edge view field and a chip is ensured.
In an exemplary embodiment, the imaging lens of the present application may satisfy the condition that (dt41+dt51)/ImgH < 0.8, wherein DT41 is an effective half-caliber of an object side surface of the fourth lens, DT51 is an effective half-caliber of an object side surface of the fifth lens, and ImgH is half of a diagonal length of an effective pixel region on an imaging surface of the imaging lens. More specifically, DT41, DT51 and ImgH may further satisfy 0.67.ltoreq. (DT 41+DT 51)/ImgH.ltoreq.0.75. The effective half calibers of the object side surfaces of the fourth lens and the fifth lens are reasonably controlled, the sizes of the fourth lens and the fifth lens can be reduced under the condition that the system has a larger image surface, and the manufacturability of the fourth lens and the fifth lens can be ensured.
In an exemplary embodiment, the imaging lens of the present application may satisfy the condition of 2 < (R3-R4)/f 2 < 2.8, wherein R3 is a radius of curvature of an object side surface of the second lens, R4 is a radius of curvature of an image side surface of the second lens, and f2 is an effective focal length of the second lens. More specifically, R3, R4 and f2 may further satisfy 2.16.ltoreq.R 3-R4/f 2.ltoreq.2.57. The condition that (R3-R4)/f 2 is less than 2.8 is satisfied, and the optical power is effectively prevented from being excessively concentrated on the first lens while the deflection of light rays on the second lens is slowed down, so that the sensitivity of the first lens and the second lens is reduced. Alternatively, the second lens element may have positive optical power, and the object-side surface thereof may be convex, and the image-side surface thereof may be convex.
Optionally, the imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface.
The imaging lens according to the above embodiment of the present application may employ a plurality of lenses, such as seven lenses described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like, the volume of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, so that the imaging lens is more beneficial to production and processing and is applicable to portable electronic products. In addition, by introducing an aspherical surface which is not rotationally symmetrical, the off-axis meridian aberration and the sagittal aberration of the imaging lens are corrected, and further image quality improvement can be obtained.
In the embodiment of the present application, aspherical mirror surfaces are often used as the mirror surfaces of the respective lenses. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality. Optionally, at least one of an object side surface and an image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens may be aspherical. Alternatively, each of the first, second, third, fourth, fifth, sixth, and seventh lenses may be aspherical in object side and image side.
However, it will be appreciated by those skilled in the art that the number of lenses making up the imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the scope of the application as claimed. For example, although seven lenses are described as an example in the embodiment, the imaging lens is not limited to include seven lenses. The imaging lens may also include other numbers of lenses, if desired.
Specific examples of the imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.
Example 1
An imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 and 2. Fig. 1 shows a schematic configuration diagram of an imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, an imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
The imaging lens according to the present application may further include a stop STO disposed between the object side and the first lens E1.
Table 1 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of embodiment 1, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
TABLE 1
It should be understood that the "radius of curvature X" and "conic coefficient X" not specifically indicated (blank) in the above table remain consistent with the corresponding values of "radius of curvature Y" and "conic coefficient Y". The following examples are similar.
As can be seen from table 1, the object side surface and the image side surface of any one of the second lens element E2, the third lens element E3, the fourth lens element E4, the fifth lens element E5, the sixth lens element E6 and the seventh lens element E7 are aspheric. In the present embodiment, the surface shape x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:
Wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the aspherical i-th order. The following Table 2 shows the higher order coefficients A 4、A6、A8、A10、A12、A14、A16、A18 and A 20 that can be used for each of the aspherical mirrors S3-S14 in example 1.
TABLE 2
As can be further seen from table 1, the object-side surface S1 and the image-side surface S2 of the first lens element E1 are non-rotationally symmetric aspheric surfaces (i.e., AAS surfaces), and the surface shape of the non-rotationally symmetric aspheric surfaces can be defined by, but not limited to, the following non-rotationally symmetric aspheric surface formula:
Wherein Z is the sagittal height of the plane parallel to the Z-axis direction; cx, cy are the curvatures (=1/radius of curvature) of the vertices of the X, Y-direction plane, respectively; kx and Ky are X, Y direction cone coefficients respectively; AR, BR, CR, DR, ER, FR, GR, HR, JR are 4 th, 6 th, 8 th, 10 th, 12 th, 14 th, 16 th, 18 th, 20 th coefficients in the aspheric rotationally symmetric component, respectively; AP, BP, CP, DP, EP, FP, GP, HP, JP are the 4 th, 6 th, 8 th, 10 th, 12 th, 14 th, 16 th, 18 th, 20 th coefficients, respectively, in the aspheric non-rotationally symmetric component. Table 3 below gives the various higher order coefficients of the non-rotationally symmetric aspheres S1 and S2 that can be used in example 1.
TABLE 3 Table 3
Table 4 shows the effective focal lengths f1 to f7 of the respective lenses in embodiment 1, the effective focal length fx in the X-axis direction of the imaging lens, the effective focal length fy in the Y-axis direction of the imaging lens, the total optical length TTL of the imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17), and half of the diagonal length ImgH of the effective pixel region on the imaging surface S17.
f1(mm) 6.19 f7(mm) -4.45
f2(mm) 5.04 fx(mm) 3.99
f3(mm) -6.05 fy(mm) 4.07
f4(mm) 33.00 TTL(mm) 4.91
f5(mm) 1015.51 ImgH(mm) 3.40
f6(mm) 24.86
TABLE 4 Table 4
The imaging lens in embodiment 1 satisfies:
fx/EPDx =1.73, where fx is the effective focal length of the imaging lens in the X-axis direction, EPDx is the entrance pupil diameter of the imaging lens in the X-axis direction;
fy/EPDy =1.73, where fy is the effective focal length in the Y-axis direction of the imaging lens, and EPDy is the entrance pupil diameter in the Y-axis direction of the imaging lens;
fx/fy=0.98, where fx is an effective focal length in the X-axis direction of the imaging lens, and fy is an effective focal length in the Y-axis direction of the imaging lens;
FOV = 78.7 °, wherein FOV is the full field angle of the imaging lens;
f3/f7=1.36, where f3 is the effective focal length of the third lens E3 and f7 is the effective focal length of the seventh lens E7;
f1/(r1+r2) =1.13, where f1 is the effective focal length of the first lens element E1, R1 is the radius of curvature of the object-side surface S1 of the first lens element E1, and R2 is the radius of curvature of the image-side surface S2 of the first lens element E1;
TTL/imgh=1.44, where TTL is the distance between the object side surface S1 of the first lens E1 and the imaging surface S17 of the imaging lens on the optical axis, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface S17 of the imaging lens;
r14/r6=0.47, where R14 is the radius of curvature of the image-side surface S14 of the seventh lens element E7, and R6 is the radius of curvature of the image-side surface S6 of the third lens element E3;
SL/ttl=0.94, where SL is a distance between the stop and the imaging surface S17 of the imaging lens on the optical axis, and TTL is a distance between the object side surface S1 of the first lens E1 and the imaging surface S17 of the imaging lens on the optical axis;
(ct2+ct4+ct5)/ct6=1.48, wherein CT2 is the center thickness of the second lens E2 on the optical axis, CT4 is the center thickness of the fourth lens E4 on the optical axis, CT5 is the center thickness of the fifth lens E5 on the optical axis, and CT6 is the center thickness of the sixth lens E6 on the optical axis;
(t34+t67)/t56=2.20, wherein T34 is the distance between the third lens E3 and the fourth lens E4 on the optical axis, T67 is the distance between the sixth lens E6 and the seventh lens E7 on the optical axis, and T56 is the distance between the fifth lens E5 and the sixth lens E6 on the optical axis;
ET 6/et7=1.26, where ET6 is the edge thickness of the sixth lens E6 and ET7 is the edge thickness of the seventh lens E7;
(dt41+dt51)/imgh=0.67, wherein DT41 is the effective half-caliber of the object side surface S7 of the fourth lens element E4, DT51 is the effective half-caliber of the object side surface S9 of the fifth lens element E5, and ImgH is half of the diagonal length of the effective pixel region on the imaging surface S17 of the imaging lens;
(R3-R4)/f2=2.44, wherein R3 is a radius of curvature of the object-side surface S3 of the second lens element E2, R4 is a radius of curvature of the image-side surface S4 of the second lens element E2, and f2 is an effective focal length of the second lens element E2.
Fig. 2 shows the magnitude of RMS spot diameters of the imaging lens of example 1 at different image height positions within the first quadrant. As can be seen from fig. 2, the imaging lens provided in embodiment 1 can achieve good imaging quality.
Example 2
An imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 and 4. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. Fig. 3 shows a schematic configuration of an imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, an imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
The imaging lens according to the present application may further include a stop STO disposed between the object side and the first lens E1.
Table 5 shows the surface type, radius of curvature X, radius of curvature Y, thickness, material, conic coefficient X, and conic coefficient Y of each lens of the imaging lens of embodiment 2, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
TABLE 5
As can be seen from table 5, in example 2, the object side surface and the image side surface of any one of the third lens element E3, the fifth lens element E5, the sixth lens element E6 and the seventh lens element E7, and the image side surface S2 of the first lens element E1, the image side surface S4 of the second lens element E2 and the object side surface S7 of the fourth lens element E4 are aspheric; the object-side surface S1 of the first lens element E1, the object-side surface S3 of the second lens element E2 and the image-side surface S8 of the fourth lens element E4 are aspheric with non-rotational symmetry.
Table 6 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 7 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surfaces S1, S3, and S8 in embodiment 2, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A1 A20
S2 -7.0848E-02 -2.3913E-03 2.2845E-03 1.1575E-04 -3.0968E-05 -2.1235E-05 -7.4922E-06 2.5034E-07 4.2985E-06
S4 -4.7797E-02 2.3110E-03 1.4091E-03 -1.1371E-04 2.3065E-04 -1.8424E-05 -2.1175E-05 9.5414E-06 -3.1340E-06
S5 -3.4220E-02 -4.1430E-03 8.7149E-04 1.5967E-04 1.9315E-04 -1.6289E-05 -2.6478E-05 6.4635E-06 3.0357E-07
S6 3.8006E-02 -4.7021E-03 1.1463E-03 3.1667E-05 6.6854E-05 2.7139E-05 -1.4321E-06 1.1519E-06 -2.9518E-07
S7 -6.0000E-02 -4.7146E-03 -6.5137E-04 2.1384E-04 -1.2304E-04 8.2475E-05 1.4113E-05 1.1253E-05 7.2662E-06
S9 -1.2302E-01 7.7991E-03 2.7702E-03 -2.5966E-04 -1.0389E-03 -1.3074E-04 1.9368E-04 -2.2853E-05 1.1504E-05
S10 -1.5726E-01 3.4562E-02 4.6541E-03 -1.4195E-03 -1.0892E-03 -7.2635E-04 3.1605E-04 3.4493E-05 4.3899E-05
S11 -4.0299E-01 -6.0311E-02 2.2273E-02 6.9278E-04 3.4364E-03 -1.1255E-03 -3.5076E-04 -4.1799E-04 -1.7229E-05
S12 -5.8927E-01 -2.4236E-02 2.8696E-02 -1.8027E-02 3.5055E-03 -1.1752E-03 1.3209E-03 1.2357E-04 1.6473E-04
S13 -1.8762E+00 6.1155E-01 -2.0040E-01 4.4985E-02 -1.0067E-02 5.9053E-03 -3.7689E-03 1.9167E-03 -3.4780E-04
S14 -1.6069E+00 4.0658E-01 -1.0119E-01 1.2734E-02 -1.0445E-02 3.3589E-03 -2.4286E-03 1.4405E-03 4.8744E-04
TABLE 6
TABLE 7
Table 8 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 2, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, and a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17.
f1(mm) 5.98 f7(mm) -7.12
f2(mm) 5.23 fx(mm) 4.04
f3(mm) -6.09 fy(mm) 3.96
f4(mm) 72.24 TTL(mm) 4.98
f5(mm) 32.57 ImgH(mm) 3.32
f6(mm) -59.65
TABLE 8
Fig. 4 shows the RMS spot diameter of the imaging lens of example 2 at different image height positions in the first quadrant. As can be seen from fig. 4, the imaging lens provided in embodiment 2 can achieve good imaging quality.
Example 3
An imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 and 6. Fig. 5 shows a schematic configuration diagram of an imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, an imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
The imaging lens according to the present application may further include a stop STO disposed between the object side and the first lens E1.
Table 9 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of embodiment 3, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
TABLE 9
As can be seen from table 9, in example 3, the object side surface and the image side surface of any one of the second lens element E2, the fifth lens element E5, the sixth lens element E6 and the seventh lens element E7, and the image side surface S2 of the first lens element E1, the image side surface S6 of the third lens element E3 and the image side surface S8 of the fourth lens element E4 are aspheric; the object side surface S1 of the first lens element E1, the object side surface S5 of the third lens element E3, and the object side surface S7 of the fourth lens element E4 are aspheric with non-rotational symmetry.
Table 10 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 11 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surfaces S1, S5, and S7 in embodiment 3, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S2 -8.5908E-02 -5.4126E-03 3.5048E-03 -1.8147E-04 -3.3878E-05 -1.0539E-05 -1.7018E-06 -6.5379E-06 1.0585E-06
S3 -4.3026E-02 2.6655E-02 5.8889E-03 -1.1392E-03 -2.1317E-04 5.3347E-05 -1.3624E-05 -1.2529E-05 3.8883E-07
S4 -4.1778E-02 3.1680E-03 2.4759E-03 7.7795E-06 1.9965E-04 1.0751E-05 -2.6007E-05 -1.0975E-05 7.4214E-07
S6 5.8149E-02 -2.1215E-03 3.7553E-03 5.6537E-04 1.5807E-04 -4.4029E-06 -4.8963E-06 -8.1299E-06 -2.0140E-06
S8 -1.3291E-01 -1.5631E-03 8.1220E-03 4.6452E-03 4.8827E-04 1.4834E-05 -1.2870E-04 -5.3877E-05 -1.9504E-05
S9 -1.3889E-01 4.7071E-03 6.0653E-03 4.9344E-04 -1.7704E-03 -3.4473E-04 2.9550E-04 1.1296E-04 2.7956E-05
S10 -1.7204E-01 3.3517E-02 2.1064E-03 -2.8423E-03 -1.0871E-03 -4.0982E-04 3.4265E-04 -2.3460E-06 5.8400E-06
S11 -3.6707E-01 -4.9088E-02 1.7986E-02 -2.0899E-03 7.4282E-04 -1.0718E-03 -2.5094E-04 -2.1504E-04 -2.3827E-05
S12 -3.1210E-01 -4.8940E-02 2.7886E-02 -8.3572E-03 1.7305E-03 -7.2717E-04 3.9221E-05 4.7900E-06 8.2480E-06
S13 -1.4162E+00 3.7054E-01 -8.3490E-02 1.5619E-02 -5.3096E-03 2.1750E-03 -4.6924E-04 3.8301E-05 5.1492E-07
S14 -1.7448E+00 3.1740E-01 -4.9184E-02 1.3885E-02 -8.9126E-03 6.1473E-03 -1.7092E-03 -1.6024E-04 8.6245E-05
Table 10
TABLE 11
Table 12 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 3, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, and a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17.
Table 12
Fig. 6 shows the magnitude of RMS spot diameters of the imaging lens of example 3 at different image height positions within the first quadrant. As can be seen from fig. 6, the imaging lens provided in embodiment 3 can achieve good imaging quality.
Example 4
An imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 and 8. Fig. 7 shows a schematic configuration diagram of an imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, an imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
The imaging lens according to the present application may further include a stop STO disposed between the object side and the first lens E1.
Table 13 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of embodiment 4, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
TABLE 13
As can be seen from table 13, in example 4, the object side surface and the image side surface of any one of the second lens element E2, the sixth lens element E6 and the seventh lens element E7, and the image side surface S2 of the first lens element E1, the image side surface S6 of the third lens element E3, the image side surface S8 of the fourth lens element E4 and the image side surface S10 of the fifth lens element E5 are aspheric; the object side surface S1 of the first lens element E1, the object side surface S5 of the third lens element E3, the object side surface S7 of the fourth lens element E4, and the object side surface S9 of the fifth lens element E5 are aspheric surfaces that are rotationally asymmetric.
Table 14 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 4, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 15 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surfaces S1, S5, S7, and S9 in embodiment 4, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
TABLE 14
TABLE 15
Table 16 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 4, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, and a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17.
f1(mm) 6.86 f7(mm) -9.13
f2(mm) 4.69 fx(mm) 3.99
f3(mm) -5.26 fy(mm) 4.11
f4(mm) 19.45 TTL(mm) 5.17
f5(mm) 153.71 ImgH(mm) 3.35
f6(mm) -108.39
Table 16
Fig. 8 shows the magnitude of RMS spot diameters of the imaging lens of example 4 at different image height positions within the first quadrant. As can be seen from fig. 8, the imaging lens provided in embodiment 4 can achieve good imaging quality.
Example 5
An imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 and 10. Fig. 9 shows a schematic configuration of an imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, an imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
The imaging lens according to the present application may further include a stop STO disposed between the object side and the first lens E1.
Table 17 shows the surface type, radius of curvature X, radius of curvature Y, thickness, material, conic coefficient X, and conic coefficient Y of each lens of the imaging lens of example 5, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
/>
TABLE 17
As can be seen from table 17, in example 5, the object side surface and the image side surface of any one of the second lens element E2, the fifth lens element E5, the sixth lens element E6 and the seventh lens element E7, and the image side surface S2 of the first lens element E1, the image side surface S6 of the third lens element E3 and the image side surface S8 of the fourth lens element E4 are aspheric; the object side surface S1 of the first lens element E1, the object side surface S5 of the third lens element E3, and the object side surface S7 of the fourth lens element E4 are aspheric with non-rotational symmetry.
Table 18 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 5, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 19 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surfaces S1, S5, and S7 in embodiment 5, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S2 -8.8321E-02 -6.8608E-03 3.2550E-03 -1.2382E-04 5.7660E-06 -3.2175E-06 3.8875E-06 -6.8573E-06 6.2106E-07
S3 -4.5331E-02 2.5783E-02 5.8987E-03 -1.1528E-03 -1.6421E-04 7.5594E-05 -1.0287E-05 -1.2196E-05 -2.9517E-07
S4 -4.4643E-02 2.4994E-03 2.4003E-03 -7.9985E-05 2.3266E-04 1.4748E-05 -2.1489E-05 -1.4484E-05 2.3248E-06
S6 5.8263E-02 -2.6062E-03 3.6331E-03 5.7956E-04 1.1439E-04 -1.4819E-05 -8.8017E-06 -8.5960E-06 -5.7847E-07
S8 -1.4021E-01 -3.8902E-03 8.0346E-03 4.5947E-03 6.5648E-04 4.3698E-05 -1.2221E-04 -4.8030E-05 -2.1341E-05
S9 -1.4017E-01 9.3660E-04 5.3073E-03 9.5800E-05 -1.3424E-03 -3.4019E-04 2.9886E-04 9.4143E-05 7.4583E-06
S10 -1.8302E-01 3.2590E-02 3.5493E-03 -2.9073E-03 -8.1819E-04 -4.2485E-04 4.1329E-04 5.4202E-07 -1.4456E-05
S11 -3.7835E-01 -5.5726E-02 1.9599E-02 -1.7599E-03 1.2150E-03 -8.4630E-04 -1.4601E-04 -2.0734E-04 -2.9978E-05
S12 -2.9264E-01 -5.6312E-02 3.0242E-02 -8.7952E-03 2.0210E-03 -6.8002E-04 7.6535E-06 4.2102E-06 5.7547E-06
S13 -1.3608E+00 3.7108E-01 -8.2712E-02 1.5933E-02 -5.3691E-03 2.1378E-03 -4.7767E-04 3.7421E-05 1.0222E-06
S14 -1.7622E+00 3.3336E-01 -3.5816E-02 1.0657E-02 -9.9689E-03 6.4776E-03 -2.0998E-03 -5.1592E-04 1.6139E-04
TABLE 18
TABLE 19
Table 20 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 5, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, and a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17.
f1(mm) 6.88 f7(mm) -10.18
f2(mm) 4.80 fx(mm) 4.03
f3(mm) -5.46 fy(mm) 3.99
f4(mm) 21.45 TTL(mm) 5.15
f5(mm) -53.98 ImgH(mm) 3.46
f6(mm) 45.65
Table 20
Fig. 10 shows the magnitude of RMS spot diameters of the imaging lens of example 5 at different image height positions within the first quadrant. As can be seen from fig. 10, the imaging lens provided in embodiment 5 can achieve good imaging quality.
Example 6
An imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 and 12. Fig. 11 shows a schematic structural diagram of an imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, an imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
The imaging lens according to the present application may further include a stop STO disposed between the object side and the first lens E1.
Table 21 shows the surface type, radius of curvature X, radius of curvature Y, thickness, material, conic coefficient X, and conic coefficient Y of each lens of the imaging lens of example 6, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
Table 21
As can be seen from table 21, in example 6, the object side surface and the image side surface of any one of the second lens element E2, the fifth lens element E5, the sixth lens element E6 and the seventh lens element E7, and the image side surface S2 of the first lens element E1, the image side surface S6 of the third lens element E3 and the image side surface S8 of the fourth lens element E4 are aspheric; the object side surface S1 of the first lens element E1, the object side surface S5 of the third lens element E3, and the object side surface S7 of the fourth lens element E4 are aspheric with non-rotational symmetry.
Table 22 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 6, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 23 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surfaces S1, S5, and S7 in embodiment 6, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S2 -8.8364E-02 -6.9066E-03 3.2582E-03 -1.3278E-04 -7.5506E-06 -2.8151E-06 3.6408E-06 -6.8967E-06 6.6901E-07
S3 -4.5399E-02 2.5667E-02 5.8831E-03 -1.1431E-03 -1.7706E-04 7.3463E-05 -9.0402E-06 -1.4216E-05 -7.6440E-07
S4 -4.4519E-02 2.4698E-03 2.4119E-03 -4.5919E-05 2.2938E-04 1.1138E-05 -2.1149E-05 -1.3721E-05 1.5918E-06
S6 5.8249E-02 -2.6003E-03 3.5899E-03 5.8969E-04 1.2185E-04 -8.9217E-06 -7.7489E-06 -7.9822E-06 -2.2648E-06
S8 -1.4464E-01 -3.1493E-03 7.7531E-03 4.1888E-03 5.5873E-04 9.6531E-07 -1.2159E-04 -4.3819E-05 -1.7381E-05
S9 -1.4208E-01 1.7535E-03 5.8203E-03 -5.5266E-04 -1.1480E-03 -3.0529E-04 2.6338E-04 8.3129E-05 5.9699E-06
S10 -1.8034E-01 3.1615E-02 4.9110E-03 -3.6860E-03 -5.9096E-04 -2.1640E-04 4.3396E-04 1.1970E-05 -1.2477E-05
S11 -3.9834E-01 -6.1166E-02 1.7485E-02 -9.8194E-04 1.9806E-03 -9.9972E-05 7.9042E-05 -1.1909E-04 -2.9960E-05
S12 -3.1270E-01 -5.3996E-02 2.9356E-02 -8.7916E-03 2.1291E-03 -6.7063E-04 2.0065E-05 4.6271E-06 4.9151E-06
S13 -1.3599E+00 3.7065E-01 -8.2384E-02 1.5990E-02 -5.3766E-03 2.1323E-03 -4.7978E-04 3.7126E-05 1.2392E-06
S14 -1.7158E+00 3.3822E-01 -4.0959E-02 9.9116E-03 -9.7588E-03 5.7194E-03 -2.1530E-03 -1.4781E-04 1.0712E-04
Table 22
Table 23
Table 24 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 6, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, and a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17.
f1(mm) 6.87 f7(mm) -10.30
f2(mm) 4.81 fx(mm) 4.02
f3(mm) -5.44 fy(mm) 4.06
f4(mm) 40.39 TTL(mm) 5.16
f5(mm) 45.70 ImgH(mm) 3.46
f6(mm) -223.58
Table 24
Fig. 12 shows the magnitude of RMS spot diameters of the imaging lens of example 6 at different image height positions within the first quadrant. As can be seen from fig. 12, the imaging lens provided in embodiment 6 can achieve good imaging quality.
Example 7
An imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 and 14. Fig. 13 shows a schematic structural diagram of an imaging lens according to embodiment 7 of the present application.
As shown in fig. 13, an imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
The imaging lens according to the present application may further include a stop STO disposed between the object side and the first lens E1.
Table 25 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of example 7, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
Table 25
As can be seen from table 25, in example 7, the object side surface and the image side surface of any one of the second lens element E2, the fourth lens element E4, the fifth lens element E5 and the seventh lens element E7, and the image side surface S2 of the first lens element E1, the object side surface S5 of the third lens element E3 and the object side surface S11 of the sixth lens element E6 are aspheric; the object side surface S1 of the first lens element E1, the image side surface S6 of the third lens element E3, and the image side surface S12 of the sixth lens element E6 are aspheric with no rotational symmetry.
Table 26 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 7, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 27 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the non-rotationally symmetric aspherical surfaces S1, S6, and S12 in embodiment 7, wherein the non-rotationally symmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S2 -7.6730E-02 -2.8204E-05 3.4563E-03 3.5091E-04 3.0772E-05 -2.1810E-05 -2.2401E-05 -1.3069E-05 -3.8941E-06
S3 -4.5081E-02 2.7833E-02 5.8577E-03 5.4227E-04 4.9829E-04 2.0382E-04 3.8195E-05 1.0359E-05 5.3037E-06
S4 -5.3677E-02 2.3689E-03 1.4347E-03 4.1470E-04 2.5700E-04 5.3641E-05 2.4433E-06 5.2913E-06 1.2938E-06
S5 -6.6670E-02 6.7451E-03 4.8918E-03 7.6644E-04 -3.4017E-04 -1.6468E-04 -1.7807E-05 1.8088E-05 2.5875E-06
S7 -8.6030E-02 -1.2883E-03 1.1586E-03 3.2540E-04 -4.6342E-04 -2.4652E-04 -1.4299E-04 -3.4156E-05 -1.7870E-05
S8 -1.4839E-01 2.9274E-03 5.9136E-05 -1.5787E-03 -1.7420E-03 -4.6452E-04 -1.8267E-04 -1.9048E-05 -2.6021E-05
S9 -1.4201E-01 1.3372E-02 1.4744E-03 -1.7049E-03 -1.3881E-03 -1.3752E-04 1.8224E-05 4.4034E-06 -3.8777E-05
S10 -1.6376E-01 4.0067E-02 5.1739E-03 -2.8408E-03 -1.3420E-03 -3.5940E-04 1.8431E-04 4.8598E-05 -1.1729E-05
S11 -3.8114E-01 -4.8655E-02 2.6892E-02 1.1908E-03 2.1817E-03 -7.8555E-04 -2.2717E-04 -2.0496E-04 -1.1017E-05
S13 -1.4556E+00 3.6172E-01 -8.4663E-02 1.4896E-02 -5.0981E-03 2.2296E-03 -5.3582E-04 3.0100E-05 1.6811E-05
S14 -1.6029E+00 3.0700E-01 -8.2394E-02 1.6569E-02 -6.7644E-03 4.4432E-03 -1.7549E-03 3.0912E-04 7.8648E-05
Table 26
Table 27
Table 28 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 7, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, and a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17.
f1(mm) 5.76 f7(mm) -10.92
f2(mm) 5.40 fx(mm) 4.26
f3(mm) -5.77 fy(mm) 4.26
f4(mm) -158.80 TTL(mm) 5.21
f5(mm) 25.69 ImgH(mm) 3.46
f6(mm) -42.72
Table 28
Fig. 14 shows the magnitude of RMS spot diameters of the imaging lens of example 7 at different image height positions within the first quadrant. As can be seen from fig. 14, the imaging lens provided in embodiment 7 can achieve good imaging quality.
Example 8
An imaging lens according to embodiment 8 of the present application is described below with reference to fig. 15 and 16. Fig. 15 shows a schematic structural diagram of an imaging lens according to embodiment 8 of the present application.
As shown in fig. 15, an imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
The imaging lens according to the present application may further include a stop STO disposed between the object side and the first lens E1.
Table 29 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of embodiment 8, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
Table 29
As can be seen from table 29, in example 8, the object side surface and the image side surface of any one of the third lens element E3, the fourth lens element E4, the fifth lens element E5 and the sixth lens element E6, and the image side surface S2 of the first lens element E1, the object side surface S3 of the second lens element E2 and the image side surface S14 of the seventh lens element E7 are aspheric; the object side surface S1 of the first lens element E1, the image side surface S4 of the second lens element E2, and the object side surface S13 of the seventh lens element E7 are aspheric with non-rotational symmetry.
Table 30 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 8, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 31 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the non-rotationally symmetric aspherical surfaces S1, S4, and S13 in embodiment 8, wherein the non-rotationally symmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S2 -7.8428E-02 -2.9728E-04 1.7954E-03 3.1656E-04 -1.2867E-04 -4.7931E-05 -5.0216E-05 -9.4811E-06 -1.0623E-05
S3 -4.5878E-02 2.5570E-02 4.6587E-03 2.0750E-04 -4.3327E-05 -1.1994E-04 -4.9926E-05 -2.4800E-05 1.6891E-05
S5 -8.3200E-03 5.5567E-03 8.2386E-03 -6.5037E-04 6.5680E-05 -3.0342E-04 1.8826E-04 7.7173E-05 5.1738E-05
S6 4.6756E-02 1.4484E-03 6.2843E-03 7.3561E-04 1.5482E-04 -1.4246E-04 -1.1207E-04 -4.0203E-05 -2.8138E-05
S7 -1.0366E-01 -1.0857E-02 2.5935E-03 9.5507E-04 3.5182E-04 3.3095E-05 9.6068E-06 -2.1680E-05 3.8759E-06
S8 -1.4665E-01 3.1644E-03 5.7566E-03 1.3934E-03 -6.5027E-04 1.8036E-04 -1.6211E-05 9.7788E-06 1.4720E-05
S9 -1.4139E-01 2.5984E-02 -7.4477E-04 -4.4195E-03 -2.6842E-03 6.0914E-04 -1.7456E-04 -6.9879E-05 -1.0755E-05
S10 -1.6610E-01 3.9736E-02 1.1452E-02 -1.0919E-03 -1.5011E-03 -3.9092E-04 -7.1788E-06 -4.1947E-06 2.4933E-05
S11 -4.5296E-01 -3.9103E-02 1.9958E-02 2.8887E-03 2.2780E-03 2.0890E-04 -1.3035E-04 -7.6416E-05 -6.8995E-05
S12 -4.5858E-01 -4.8650E-02 2.6702E-02 -9.4862E-03 2.7555E-03 -1.3729E-03 3.4620E-04 -8.6485E-05 6.2133E-05
S14 -1.7270E+00 3.5183E-01 -8.4679E-02 1.6296E-02 -7.5123E-03 5.5076E-03 -1.8230E-03 5.4555E-04 -1.3799E-04
Table 30
Table 31
Table 32 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 8, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, and a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17.
Table 32
Fig. 16 shows the magnitude of RMS spot diameters of the imaging lens of example 8 at different image height positions within the first quadrant. As can be seen from fig. 16, the imaging lens provided in embodiment 8 can achieve good imaging quality.
Example 9
An imaging lens according to embodiment 9 of the present application is described below with reference to fig. 17 and 18. Fig. 17 shows a schematic configuration diagram of an imaging lens according to embodiment 9 of the present application.
As shown in fig. 17, an imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
The imaging lens according to the present application may further include a stop STO disposed between the object side and the first lens E1.
Table 33 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of example 9, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
Table 33
As can be seen from table 33, in example 9, the object side surface and the image side surface of any one of the third lens element E3, the fourth lens element E4, the fifth lens element E5, the sixth lens element E6 and the seventh lens element E7, and the image side surface S2 of the first lens element E1 and the object side surface S3 of the second lens element E2 are aspheric; the object side surface S1 of the first lens element E1 and the image side surface S4 of the second lens element E2 are aspheric with respect to non-rotational symmetry.
Table 34 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 9, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 35 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surfaces S1 and S4 in embodiment 9, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
/>
Watch 34
Table 35
Table 36 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 9, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, and a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17.
f1(mm) 4.79 f7(mm) -3.97
f2(mm) 5.02 fx(mm) 4.66
f3(mm) -4.56 fy(mm) 4.29
f4(mm) -24.18 TTL(mm) 5.20
f5(mm) 14.16 ImgH(mm) 3.46
f6(mm) 30.45
Table 36
Fig. 18 shows the magnitude of RMS spot diameters of the imaging lens of example 9 at different image height positions within the first quadrant. As can be seen from fig. 18, the imaging lens provided in embodiment 9 can achieve good imaging quality.
Example 10
An imaging lens according to embodiment 10 of the present application is described below with reference to fig. 19 and 20. Fig. 19 shows a schematic structural diagram of an imaging lens according to embodiment 10 of the present application.
As shown in fig. 19, an imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
The imaging lens according to the present application may further include a stop STO disposed between the object side and the first lens E1.
Table 37 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of embodiment 10, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
Table 37
As can be seen from table 37, in example 10, the object side surface and the image side surface of any one of the fourth lens element E4, the fifth lens element E5 and the sixth lens element E6, and the image side surface S2 of the first lens element E1, the object side surface S3 of the second lens element E2, the object side surface S5 of the third lens element E3 and the object side surface S13 of the seventh lens element E7 are aspherical surfaces; the object side surface S1 of the first lens element E1, the image side surface S4 of the second lens element E2, the image side surface S6 of the third lens element E3, and the image side surface S14 of the seventh lens element E7 are aspheric with no rotational symmetry.
Table 38 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 10, where each of the aspherical surface types can be defined by equation (1) given in example 1 above. Table 39 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the rotationally asymmetric aspherical surfaces S1, S4, S6, and S14 in embodiment 10, wherein the rotationally asymmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 described above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S2 -7.8355E-02 7.0585E-04 2.7901E-03 2.6432E-04 1.9267E-05 7.5055E-06 -1.4604E-05 -6.0053E-06 2.2243E-06
S3 -4.7981E-02 1.8606E-02 2.6843E-03 -3.3123E-04 9.4923E-05 4.8250E-05 4.1103E-06 -1.3638E-05 5.6044E-06
S5 -6.3577E-02 2.1526E-03 3.7260E-03 3.7693E-04 8.6129E-05 -1.2757E-04 -1.6668E-05 -7.2575E-06 1.1974E-05
S7 -8.8909E-02 -2.0109E-03 5.5380E-04 7.0436E-04 -1.0759E-04 -5.2760E-05 -2.4264E-05 -2.0117E-06 -1.3680E-05
S8 -1.3141E-01 6.3906E-03 -6.2757E-05 -8.4067E-04 -7.5965E-04 -2.6144E-04 2.3828E-05 -1.1309E-05 -1.2642E-05
S9 -1.3580E-01 1.7055E-02 4.3887E-03 -4.6515E-03 -1.2652E-03 -5.3221E-04 3.3704E-05 -4.9202E-05 -1.0350E-04
S10 -1.4144E-01 2.3003E-02 1.5409E-02 -5.0754E-03 -1.0868E-04 -8.5356E-04 2.5719E-04 -1.1778E-05 8.0442E-06
S11 -3.4021E-01 -5.5457E-02 2.2456E-02 9.2575E-04 4.1408E-03 7.8261E-04 -1.3564E-04 -1.3545E-04 -4.5665E-04
S12 -5.3027E-01 -7.9383E-02 3.6836E-02 -2.0769E-02 7.8026E-03 -3.0929E-03 1.8619E-03 -4.7701E-04 1.4742E-04
S13 -1.5232E+00 4.0838E-01 -1.0852E-01 2.0794E-02 -5.5554E-03 4.2199E-03 -1.5492E-03 3.9963E-04 -7.1041E-05
Table 38
Table 39
Table 40 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 10, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, and a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17.
f1(mm) 5.31 f7(mm) -4.60
f2(mm) 5.86 fx(mm) 4.07
f3(mm) -5.72 fy(mm) 4.56
f4(mm) 45.42 TTL(mm) 5.19
f5(mm) 10.33 ImgH(mm) 3.35
f6(mm) -9.65
Table 40
Fig. 20 shows the magnitude of RMS spot diameters of the imaging lens of embodiment 10 at different image height positions within the first quadrant. As can be seen from fig. 20, the imaging lens provided in embodiment 10 can achieve good imaging quality.
Example 11
An imaging lens according to embodiment 11 of the present application is described below with reference to fig. 21 and 22. Fig. 21 shows a schematic configuration diagram of an imaging lens according to embodiment 11 of the present application.
As shown in fig. 21, an imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
The imaging lens according to the present application may further include a stop STO disposed between the object side and the first lens E1.
Table 41 shows the surface types, the radius of curvature X, the radius of curvature Y, the thickness, the material, the conic coefficient X, and the conic coefficient Y of each lens of the imaging lens of embodiment 11, wherein the units of the radius of curvature X, the radius of curvature Y, and the thickness are millimeters (mm).
Table 41
As can be seen from table 41, in example 11, the object side surface and the image side surface of any one of the second lens element E2, the fourth lens element E4, the fifth lens element E5 and the sixth lens element E6, and the image side surface S2 of the first lens element E1, the object side surface S5 of the third lens element E3 and the object side surface S13 of the seventh lens element E7 are aspheric; the object side surface S1 of the first lens element E1, the image side surface S6 of the third lens element E3, and the image side surface S14 of the seventh lens element E7 are aspheric with no rotational symmetry.
Table 42 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 11, where each of the aspherical surface types can be defined by the formula (1) given in example 1 above. Table 43 shows rotationally symmetric components and higher-order coefficients of the rotationally symmetric components that can be used for the non-rotationally symmetric aspherical surfaces S1, S6, and S14 in embodiment 11, wherein the non-rotationally symmetric aspherical surface profile can be defined by the formula (2) given in embodiment 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S2 -7.7906E-02 7.5020E-04 2.8405E-03 2.3491E-04 1.3983E-05 4.3551E-06 -1.4958E-05 -5.1715E-06 2.1076E-06
S3 -4.7914E-02 1.8811E-02 2.5891E-03 -3.2880E-04 9.8560E-05 4.9967E-05 3.8111E-06 -1.2625E-05 5.9865E-06
S4 -5.2980E-02 2.8056E-04 1.5281E-03 2.7541E-05 3.3874E-04 -3.7779E-05 -2.2500E-06 -7.7859E-06 4.8121E-06
S5 -6.3266E-02 2.0394E-03 3.9848E-03 2.8055E-04 8.9751E-05 -1.3114E-04 -1.2508E-05 -7.9126E-06 1.0283E-05
S7 -8.8319E-02 -2.2417E-03 6.1154E-04 6.8080E-04 -1.8066E-04 -6.3329E-05 -3.6624E-05 -7.9269E-06 -2.1467E-05
S8 -1.3197E-01 6.6785E-03 -1.9190E-04 -9.5004E-04 -8.5002E-04 -2.5508E-04 2.3690E-05 -1.7411E-05 -1.8933E-05
S9 -1.3537E-01 1.6522E-02 4.3512E-03 -4.5258E-03 -1.1730E-03 -5.1081E-04 7.4711E-05 -5.4209E-05 -9.5222E-05
S10 -1.4504E-01 2.2580E-02 1.5100E-02 -5.1891E-03 -1.7757E-04 -8.7469E-04 2.5184E-04 -7.6971E-06 4.9375E-06
S11 -3.2450E-01 -5.7359E-02 2.3665E-02 -2.9887E-04 3.5888E-03 3.5368E-04 -1.9847E-04 -1.4082E-04 -3.7535E-04
S12 -5.3145E-01 -7.5809E-02 3.7641E-02 -2.1449E-02 7.2054E-03 -2.7644E-03 1.7494E-03 -3.7322E-04 1.4311E-04
S13 -1.5552E+00 4.0870E-01 -1.1007E-01 2.0192E-02 -5.8015E-03 3.9894E-03 -1.4143E-03 3.2823E-04 -3.0260E-05
Table 42
Table 43
Table 44 shows effective focal lengths f1 to f7 of the respective lenses in embodiment 11, an effective focal length fx in the X-axis direction of the imaging lens, an effective focal length fy in the Y-axis direction of the imaging lens, an optical total length TTL of the imaging lens, and a half of the diagonal length ImgH of the effective pixel region on the imaging surface S17.
f1(mm) 5.54 f7(mm) -6.03
f2(mm) 5.59 fx(mm) 4.06
f3(mm) -5.83 fy(mm) 4.43
f4(mm) 99.65 TTL(mm) 5.19
f5(mm) 9.61 ImgH(mm) 3.35
f6(mm) -9.48
Table 44
Fig. 22 shows the magnitude of RMS spot diameters of the imaging lens of example 11 at different image height positions within the first quadrant. As can be seen from fig. 22, the imaging lens provided in embodiment 11 can achieve good imaging quality.
In summary, examples 1 to 11 satisfy the relationships shown in table 45, respectively.
Table 45
The application also provides an image pickup device, wherein the electronic photosensitive element can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand-alone imaging apparatus such as a digital camera, or may be an imaging module integrated on a mobile electronic apparatus such as a cellular phone. The image pickup apparatus is equipped with the imaging lens described above.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims (14)

1. The imaging lens sequentially comprises, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power, characterized in that,
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 second lens has positive optical power;
the third lens has negative focal power; the seventh lens has negative focal power;
at least one of the fourth lens and the fifth lens has positive optical power;
At least one of the first to seventh lenses has an aspherical surface that is non-rotationally symmetrical; and
The object side surface of the first lens is an aspheric surface which is not rotationally symmetrical, and the number of the aspheric surfaces which are not rotationally symmetrical in the imaging lens is at least two;
The effective focal length f1 of the first lens, the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy 0.5 < f 1/(R1+R2) < 1.5;
The effective focal length fx of the imaging lens in the X-axis direction and the entrance pupil diameter EPDx of the imaging lens in the X-axis direction meet the conditions that fx/EPDx is less than or equal to 1.58 and less than 1.9; and
The effective focal length fy of the imaging lens in the Y-axis direction and the entrance pupil diameter EPDy of the imaging lens in the Y-axis direction meet the conditions that fy/EPDy is less than or equal to 1.58 and less than 1.9;
The number of lenses having optical power in the imaging lens is seven.
2. The imaging lens according to claim 1, wherein an effective focal length fx in an X-axis direction of the imaging lens and an effective focal length fy in a Y-axis direction of the imaging lens satisfy 0.8 < fx/fy < 1.2.
3. The imaging lens as claimed in claim 1, wherein an effective focal length f3 of the third lens and an effective focal length f7 of the seventh lens satisfy 0.5 < f3/f7 < 1.5.
4. The imaging lens as claimed in claim 1, wherein the object-side surface of the seventh lens element is convex and the image-side surface is concave.
5. The imaging lens of claim 4, wherein an image side surface of the sixth lens is concave.
6. The imaging lens as claimed in claim 4, wherein an image side surface of the third lens is a concave surface; and
The curvature radius R14 of the image side surface of the seventh lens and the curvature radius R6 of the image side surface of the third lens satisfy 0.2 < R14/R6 < 0.7.
7. The imaging lens as claimed in claim 1, wherein 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, and an effective focal length f2 of the second lens satisfy 2 < (R3-R4)/f 2 < 2.8.
8. The imaging lens as claimed in claim 1, wherein an edge thickness ET6 of the sixth lens and an edge thickness ET7 of the seventh lens satisfy 0.9 < ET6/ET7 < 1.6.
9. The imaging lens as claimed in claim 1, wherein an effective half-aperture DT41 of an object side surface of the fourth lens, an effective half-aperture DT51 of an object side surface of the fifth lens, and a half of a diagonal length ImgH of an effective pixel region on an imaging surface of the imaging lens satisfy 0.5 < (dt41+dt51)/ImgH < 0.8.
10. The imaging lens according to claim 1, wherein a separation distance T34 of the third lens and the fourth lens on the optical axis, a separation distance T67 of the sixth lens and the seventh lens on the optical axis, and a separation distance T56 of the fifth lens and the sixth lens on the optical axis satisfy 1.4 < (t34+t67)/t56 < 2.5.
11. The imaging lens according to claim 1, wherein a center thickness CT2 of the second lens on the optical axis, a center thickness CT4 of the fourth 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 1.1 < (CT 2+ct4+ct 5)/CT 6 < 1.6.
12. The imaging lens of any of claims 1 to 11, wherein a full field angle FOV of the imaging lens satisfies 70 ° < FOV < 90 °.
13. The imaging lens according to any one of claims 1 to 11, further comprising a diaphragm, a distance SL of the diaphragm to an imaging surface of the imaging lens on the optical axis and a distance TTL of an object side surface of the first lens to the imaging surface of the imaging lens on the optical axis satisfying 0.8 < SL/TTL < 1.
14. The imaging lens of any of claims 1 to 11, wherein a distance TTL on the optical axis from an object side surface of the first lens to an imaging surface of the imaging lens and a half of a diagonal length ImgH of an effective pixel area on the imaging surface of the imaging lens satisfy 1.3 < TTL/ImgH < 1.6.
CN201811502929.9A 2018-12-10 2018-12-10 Imaging lens Active CN109407278B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811502929.9A CN109407278B (en) 2018-12-10 2018-12-10 Imaging lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811502929.9A CN109407278B (en) 2018-12-10 2018-12-10 Imaging lens

Publications (2)

Publication Number Publication Date
CN109407278A CN109407278A (en) 2019-03-01
CN109407278B true CN109407278B (en) 2024-04-23

Family

ID=65458053

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811502929.9A Active CN109407278B (en) 2018-12-10 2018-12-10 Imaging lens

Country Status (1)

Country Link
CN (1) CN109407278B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI665488B (en) 2018-12-26 2019-07-11 大立光電股份有限公司 Photographing optical system, image capturing unit and electronic device
CN110208925B (en) 2019-07-02 2024-04-30 浙江舜宇光学有限公司 Optical imaging lens
CN112346209B (en) * 2019-08-09 2022-10-11 华为技术有限公司 Camera module and terminal equipment
CN112788204B (en) * 2019-11-08 2022-07-22 宁波舜宇车载光学技术有限公司 Lens group, camera module and imaging system
US11719911B2 (en) 2020-02-14 2023-08-08 Largan Precision Co., Ltd. Imaging optical lens assembly, image capturing unit and electronic device
TWI712816B (en) 2020-02-14 2020-12-11 大立光電股份有限公司 Imaging optical lens assembly, image capturing unit and electronic device
CN114578634B (en) * 2020-11-30 2024-07-16 宁波舜宇车载光学技术有限公司 Projection system and electronic equipment
CN113985574B (en) * 2021-11-04 2024-01-16 浙江舜宇光学有限公司 Optical imaging lens

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000028919A (en) * 1998-07-09 2000-01-28 Mamiya Op Co Ltd Middle telephotographic lens
JP2012133298A (en) * 2010-12-03 2012-07-12 Ricoh Co Ltd Image read lens, image reader, and image forming apparatus
JP2012133175A (en) * 2010-12-22 2012-07-12 Nikon Corp Imaging optical system and image pickup device
CN106461904A (en) * 2014-07-28 2017-02-22 大族激光科技产业集团股份有限公司 Photographic objective lens and photographic equipment
CN106501928A (en) * 2016-11-15 2017-03-15 上海乐蜗信息科技有限公司 A kind of optical system
CN106842512A (en) * 2017-04-17 2017-06-13 浙江舜宇光学有限公司 Pick-up lens
KR101837371B1 (en) * 2017-11-20 2018-03-12 (주)디오스텍 Fast and small optical system for high-pixel
CN207516627U (en) * 2017-11-08 2018-06-19 湖南戴斯光电有限公司 A kind of asymmetric vision lens of robot
CN108710193A (en) * 2015-02-17 2018-10-26 大立光电股份有限公司 Camera chain and image-taking device
CN208126002U (en) * 2018-03-27 2018-11-20 东莞市旭瑞光电科技有限公司 A kind of non-rotational symmetry camera lens
CN209624885U (en) * 2018-12-10 2019-11-12 浙江舜宇光学有限公司 Imaging lens

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000028919A (en) * 1998-07-09 2000-01-28 Mamiya Op Co Ltd Middle telephotographic lens
JP2012133298A (en) * 2010-12-03 2012-07-12 Ricoh Co Ltd Image read lens, image reader, and image forming apparatus
JP2012133175A (en) * 2010-12-22 2012-07-12 Nikon Corp Imaging optical system and image pickup device
CN106461904A (en) * 2014-07-28 2017-02-22 大族激光科技产业集团股份有限公司 Photographic objective lens and photographic equipment
CN108710193A (en) * 2015-02-17 2018-10-26 大立光电股份有限公司 Camera chain and image-taking device
CN106501928A (en) * 2016-11-15 2017-03-15 上海乐蜗信息科技有限公司 A kind of optical system
CN106842512A (en) * 2017-04-17 2017-06-13 浙江舜宇光学有限公司 Pick-up lens
CN207516627U (en) * 2017-11-08 2018-06-19 湖南戴斯光电有限公司 A kind of asymmetric vision lens of robot
KR101837371B1 (en) * 2017-11-20 2018-03-12 (주)디오스텍 Fast and small optical system for high-pixel
CN208126002U (en) * 2018-03-27 2018-11-20 东莞市旭瑞光电科技有限公司 A kind of non-rotational symmetry camera lens
CN209624885U (en) * 2018-12-10 2019-11-12 浙江舜宇光学有限公司 Imaging lens

Also Published As

Publication number Publication date
CN109407278A (en) 2019-03-01

Similar Documents

Publication Publication Date Title
CN109581631B (en) Imaging lens
CN108469669B (en) Image pickup lens
CN109283665B (en) Imaging lens
CN109407278B (en) Imaging lens
CN109298515B (en) Image pickup lens
CN109541783B (en) Image pickup lens
CN109100854B (en) Image pickup lens
CN109752826B (en) Optical imaging lens
CN109116520B (en) Optical imaging lens
CN108919463B (en) Optical imaging lens
CN113376808B (en) Image pickup lens assembly
US11656437B2 (en) Optical imaging system including six lenses of −−++−+ refractive powers
CN109375349B (en) Imaging lens
CN109445072B (en) Image pickup lens group
CN110045488B (en) Optical imaging lens
CN109407280B (en) Imaging lens
CN109270661B (en) Image pickup lens group
CN109656000B (en) Image pickup lens group
CN109521554B (en) Image pickup lens group
CN109613678B (en) Imaging lens
CN209911623U (en) Imaging lens
CN108490587B (en) Imaging lens
CN111025583B (en) Optical imaging lens
CN109491054B (en) Optical imaging lens
CN109375348B (en) Optical imaging system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant