CN213903939U - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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CN213903939U
CN213903939U CN202120038651.5U CN202120038651U CN213903939U CN 213903939 U CN213903939 U CN 213903939U CN 202120038651 U CN202120038651 U CN 202120038651U CN 213903939 U CN213903939 U CN 213903939U
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lens
optical
image
optical imaging
focal length
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陈晨
朱晓晓
徐武超
戴付建
赵烈烽
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Abstract

The utility model discloses an optical imaging lens, optical imaging lens include according to the preface by thing side to image side along the optical axis: a first lens having a positive optical power; a second lens having an optical power; a third lens having optical power; a fourth lens having a positive optical power; a fifth lens element with a focal power, wherein the object-side surface of the fifth lens element is convex and the image-side surface of the fifth lens element is concave; the sixth lens with positive focal power has a convex object-side surface and a convex image-side surface; and a seventh lens having a negative optical power; wherein, the half ImgH of the diagonal length of the effective pixel area on the imaging surface and the on-axis distance TTL from the object side surface of the first lens to the imaging surface satisfy: 4.0mm < ImgH × ImgH/TTL <6.0 mm. The utility model discloses an optical imaging lens, through the focal power distribution of each component of reasonable control system, the low order aberration of balanced system can be effectively, the sensitivity of reduction tolerance, through the proportional relation of restraint system optics overall length and half image height to realize the big image plane of optical system, ultra-thin characteristics possesses good formation of image effect.

Description

Optical imaging lens
Technical Field
The utility model belongs to the optical imaging field especially relates to an optical imaging lens including seven lens.
Background
With the improvement of the performance of the photosensitive element and the reduction of the pixel size, higher requirements are put forward on the corresponding optical imaging lens, so that lenses with the specifications of large aperture, high pixel, miniaturization and the like are developed, and an imaging system is required to be capable of imaging scenes clearly.
Therefore, in order to better meet the application requirements of the main camera on the next generation of high-end smart phones, an optical imaging system with a large image plane and a large aperture is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an optical imaging lens that seven lenses are constituteed has optical properties such as big image plane, big light ring.
An aspect of the present invention provides an optical imaging lens, which includes, along an optical axis, from an object side to an image side according to a predetermined order: a first lens having a positive optical power; a second lens having an optical power; a third lens having optical power; a fourth lens having a positive optical power; a fifth lens element with a focal power, wherein the object-side surface of the fifth lens element is convex and the image-side surface of the fifth lens element is concave; the sixth lens with positive focal power has a convex object-side surface and a convex image-side surface; and a seventh lens having a negative optical power.
Wherein, the half ImgH of the diagonal length of the effective pixel area on the imaging surface and the on-axis distance TTL from the object side surface of the first lens to the imaging surface satisfy: 4.0mm < ImgH × ImgH/TTL <6.0 mm; the combined focal length f12 of the first lens and the second lens, the combined focal length f67 of the sixth lens and the seventh lens, and the combined focal length f34 of the third lens and the fourth lens meet the following requirements: -1.0< (f12-f67)/f34< 1.0.
According to the utility model discloses an embodiment, first lens object side is to the epaxial distance TTL of imaging surface and imaging surface on the regional diagonal length of effective pixel half ImgH satisfy: TTL/ImgH < 1.3.
According to the utility model discloses an embodiment, the effective focal length f of optical imaging lens satisfies with optical imaging lens's maximum field angle FOV: 4.8mm < f × tan (1/2FOV) <5.8 mm.
According to the utility model discloses an embodiment, the effective focal length f of optics imaging lens satisfies with the entrance pupil diameter EPD of optics imaging lens: f/EPD < 1.7.
According to an embodiment of the present invention, the curvature radius R11 of the object-side surface of the sixth lens element, the curvature radius R12 of the image-side surface of the sixth lens element, and the effective focal length f6 of the sixth lens element satisfy: 2.0< (R11-R12)/f6< 2.5.
According to the utility model discloses an embodiment, the effective focal length f1 of first lens, the effective focal length f7 of seventh lens and the effective focal length f of optical imaging lens satisfy: 1.4< (f1-f7)/f < 1.8.
According to an embodiment of the present invention, the effective focal length f2 of the second lens, the curvature radius R4 of the image side surface of the second lens, and the curvature radius R3 of the object side surface of the second lens satisfy: 1.9< f2/(R4-R3) < 7.1.
According to an embodiment of the present invention, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT4 of the fourth lens on the optical axis satisfy: 1.4< (CT1+ CT2)/(CT3+ CT4) < 2.2.
According to an embodiment of the present invention, the axial distance SAG62 between the intersection point of the sixth lens image side surface and the optical axis and the effective radius vertex of the sixth lens image side surface and the axial distance SAG52 between the intersection point of the fifth lens image side surface and the optical axis and the effective radius vertex of the fifth lens image side surface satisfy: 1.6< SAG62/SAG52< 2.4.
According to an embodiment of the present invention, the on-axis distance SAG71 between the intersection of the seventh lens object-side surface and the optical axis to the effective radius vertex of the seventh lens object-side surface and the edge thickness ET7 of the seventh lens satisfies: -3.6< SAG71/ET7< -1.3.
According to an embodiment of the present invention, the conditional expression that the edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens, and the edge thickness ET6 of the sixth lens satisfy is: 0.7< (ET4+ ET5)/ET6< 1.4.
Another aspect of the present invention provides an optical imaging lens, which includes, along an optical axis, from an object side to an image side according to a predetermined order: a first lens having a positive optical power; a second lens having an optical power; a third lens having optical power; a fourth lens having a positive optical power; a fifth lens element with a focal power, wherein the object-side surface of the fifth lens element is convex and the image-side surface of the fifth lens element is concave; the sixth lens with positive focal power has a convex object-side surface and a convex image-side surface; a seventh lens having a negative optical power.
Wherein, each lens is independent, and there is air space on the optical axis between each lens; half ImgH of the diagonal length of the effective pixel area on the imaging surface and the on-axis distance TTL from the object side surface of the first lens to the imaging surface satisfy: 4.0mm < ImgH × ImgH/TTL <6.0 mm; an on-axis distance SAG62 between an intersection point of the image-side surface of the sixth lens and the optical axis and an effective radius vertex of the image-side surface of the sixth lens and an on-axis distance SAG52 between an intersection point of the image-side surface of the fifth lens and the optical axis and an effective radius vertex of the image-side surface of the fifth lens satisfy: 1.6< SAG62/SAG52< 2.4.
The utility model has the advantages that:
the utility model provides an optical imaging camera lens includes multi-disc lens, like first lens to seventh lens. The distribution of focal power of each component of the system is reasonably controlled, so that the low-order aberration of the system can be effectively balanced, the sensitivity of tolerance is reduced, and the proportional relation between the total optical length and the half-image height of the system is restrained, so that the characteristics of large image surface and ultrathin performance of the optical system are realized, and the system has a good imaging effect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic view of a lens assembly according to embodiment 1 of the present invention;
fig. 2a to fig. 2d are an axial chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, according to the optical imaging lens of embodiment 1 of the present invention;
fig. 3 is a schematic view of a lens assembly according to embodiment 2 of the optical imaging lens of the present invention;
fig. 4a to 4d are an axial chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, according to embodiment 2 of the optical imaging lens of the present invention;
fig. 5 is a schematic view of a lens assembly structure according to embodiment 3 of the optical imaging lens system of the present invention;
fig. 6a to 6d are an axial chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, according to embodiment 3 of the optical imaging lens of the present invention;
fig. 7 is a schematic view of a lens assembly structure according to embodiment 4 of the optical imaging lens system of the present invention;
fig. 8a to 8d are an axial chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, according to embodiment 4 of the optical imaging lens of the present invention;
fig. 9 is a schematic view of a lens assembly structure according to embodiment 5 of the optical imaging lens system of the present invention;
fig. 10a to 10d are an axial chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, according to embodiment 5 of the optical imaging lens of the present invention;
fig. 11 is a schematic view of a lens assembly according to embodiment 6 of the optical imaging lens system of the present invention;
fig. 12a to 12d are an axial chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve according to embodiment 6 of the optical imaging lens of the present invention, respectively;
fig. 13 is a schematic view of a lens assembly according to embodiment 7 of the optical imaging lens system of the present invention;
fig. 14a to 14d are an axial chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, according to embodiment 7 of the optical imaging lens of the present invention;
fig. 15 is a schematic view of a lens assembly according to embodiment 8 of the present invention;
fig. 16a to 16d are an axial chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve according to embodiment 8 of the optical imaging lens of the present invention, respectively.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present invention.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
In the description of the present invention, the paraxial region means a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. Features, principles and other aspects of the present invention will be described in detail below with reference to the drawings and in conjunction with embodiments.
Exemplary embodiments
The optical imaging lens of the exemplary embodiment of the present invention includes seven lenses, and includes in order from the object side to the image side along the optical axis: the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the lenses are independent from each other, and an air space is formed between the lenses on an optical axis.
In the present exemplary embodiment, the first lens has positive optical power; the second lens may have a positive or negative optical power; the third lens may have a positive optical power or a negative optical power; the fourth lens has positive focal power; the fifth lens can have positive focal power or negative focal power, the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the sixth lens has positive focal power, and the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a convex surface; the seventh lens has a negative power. By properly controlling the distribution of the powers of the various components of the system, the low-order aberrations of the system can be effectively balanced, reducing tolerance sensitivity.
In the present exemplary embodiment, the conditional expression that half ImgH of the diagonal length of the effective pixel region on the imaging plane and the on-axis distance TTL from the object-side surface of the first lens to the imaging plane satisfy is: 4.0mm < ImgH × ImgH/TTL <6.0 mm. The proportional relation between the total optical length and the half-image height of the system is restricted, so that the characteristics of large image surface and ultra-thin of the optical system are realized, and the system has good imaging effect. More specifically, ImgH and TTL satisfy: ImgH multiplied by ImgH/TTL which is not more than 4.09mm is not more than 4.16 mm.
In the present exemplary embodiment, the conditional expression that the on-axis distance TTL from the object-side surface of the first lens to the imaging surface and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy is: TTL/ImgH < 1.3. The ratio of the total optical length to the half-image height of the constraint system is in a certain range, so that the ultrathin and high-pixel characteristics of the optical imaging system are realized. More specifically, TTL and ImgH satisfy: TTL/ImgH is more than or equal to 1.25 and less than or equal to 1.27.
In the present exemplary embodiment, the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy the conditional expression: 4.8mm < f × tan (1/2FOV) <5.8 mm. And controlling the size of the image plane of the optical system by restricting the relation between the effective focal length and the field angle. More specifically, f and FOV satisfy: f multiplied by tan (1/2FOV) is not less than 4.97mm and not more than 5.11 mm.
In the present exemplary embodiment, the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy the conditional expression: f/EPD < 1.7. The aperture of the optical system is controlled by restricting the ratio of the effective focal length to the diameter of the entrance pupil, so as to realize the characteristic of large aperture. More specifically, f and EPD satisfy: f/EPD is 1.65.
In the present exemplary embodiment, the conditional expression that the curvature radius R11 of the object-side surface of the sixth lens, the curvature radius R12 of the image-side surface of the sixth lens, and the effective focal length f6 of the sixth lens satisfy is: 2.0< (R11-R12)/f6< 2.5. By controlling the ratio of the curvature radius of two side surfaces of the object image of the sixth lens to the effective focal length, the deflection angle of marginal light of the system can be reasonably controlled, the optical lens is ensured to have good processing characteristic, and the system sensitivity is reduced. More specifically, R11, R12 and f6 satisfy: 2.10 is less than or equal to (R11-R12)/f6 is less than or equal to 2.32.
In the present exemplary embodiment, the effective focal length f1 of the first lens, the effective focal length f7 of the seventh lens, and the effective focal length f of the optical imaging lens satisfy the conditional expression: 1.4< (f1-f7)/f < 1.8. By controlling the effective focal lengths of the first lens and the seventh lens, the contribution amount of the first lens and the seventh lens to the aberration of the whole optical system can be controlled, and the off-axis aberration of the system is balanced, so that the imaging quality of the system is improved. More specifically, f1, f7 and f satisfy: (f1-f7)/f is not more than 1.50 and not more than 1.61.
In the present exemplary embodiment, the effective focal length f2 of the second lens, the radius of curvature R4 of the image-side surface of the second lens, and the radius of curvature R3 of the object-side surface of the second lens satisfy the conditional expression: 1.9< f2/(R4-R3) < 7.1. The sensitivity of the front-end lens is reduced by controlling the ratio of the effective focal length of the second lens to the curvature radius of the two side faces of the object image within a reasonable range, and the yield is improved while the processability is ensured. More specifically, f2, R4 and R3 satisfy: f2/(R4-R3) is more than or equal to 1.93 and less than or equal to 6.98.
In the present exemplary embodiment, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT4 of the fourth lens on the optical axis satisfy the conditional expressions:
1.4< (CT1+ CT2)/(CT3+ CT4) < 2.2. By limiting the central thickness of the front and rear lenses, the field curvature contribution of each field of view of the system is controlled within a reasonable range, so that the field curvature of other lenses is balanced, and the resolution of the lens is effectively improved. More specifically, CT1, CT2, CT3 and CT4 satisfy: 1.58 is less than or equal to (CT1+ CT2)/(CT3+ CT4) is less than or equal to 2.07.
In the present exemplary embodiment, the combined focal length f12 of the first and second lenses, the combined focal length f67 of the sixth and seventh lenses, and the combined focal length f34 of the third and fourth lenses satisfy the conditional expressions: -1.0< (f12-f67)/f34< 1.0. The focal length relation of each lens is restrained to reasonably distribute the focal power of the optical system, and the characteristics of high imaging quality, low sensitivity and easiness in processing and forming are met. More specifically, f12, f67 and f34 satisfy: (f12-f67)/f34 is less than or equal to 0.49 and less than or equal to 0.65.
In the present exemplary embodiment, the conditional expression that the on-axis distance SAG62 between the intersection point of the sixth lens image-side surface and the optical axis to the effective radius vertex of the sixth lens image-side surface and the on-axis distance SAG52 between the intersection point of the fifth lens image-side surface and the optical axis to the effective radius vertex of the fifth lens image-side surface satisfy: 1.6< SAG62/SAG52< 2.4. Through the rise ratio of controlling sixth lens and fifth lens, come the excessive homogeneity of reasonable constraint lens shape, make the eccentricity of fifth, sixth lens simultaneously, the slope sensitivity reduces, also has great profit to optical system's distortion, is favorable to realizing mass production. More specifically, SAG62 and SAG52 satisfy: 1.77 is less than or equal to SAG62/SAG52 is less than or equal to 2.26.
In the present exemplary embodiment, the on-axis distance SAG71 between the intersection of the seventh lens object-side surface and the optical axis to the effective radius vertex of the seventh lens object-side surface and the edge thickness ET7 of the seventh lens satisfies the conditional expression: -3.6< SAG71/ET7< -1.3. Through the rise and the marginal thickness ratio of control seventh lens, can reduce the shaping of lens, the coating, the assemblage degree of difficulty has also avoidd the weld mark risk simultaneously, promotes the assemblage yield. More specifically, SAG71 and ET7 satisfy: -3.55 is more than or equal to SAG71/ET7 is more than or equal to-1.38.
In the present exemplary embodiment, the conditional expression that the edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens, and the edge thickness ET6 of the sixth lens satisfy is: 0.7< (ET4+ ET5)/ET6< 1.4. By restricting the edge thicknesses of the fourth, fifth and sixth lenses, the rationality of the lens shape is controlled, the field curvature of the system is balanced, and the aberration correction capability is improved. More specifically, ET4, ET5 and ET6 satisfy: 0.82-1.23 of (ET4+ ET5)/ET 6.
In the present exemplary embodiment, the above-described optical imaging lens may further include a diaphragm. The stop may be disposed at an appropriate position as needed, for example, the stop may be disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.
The optical imaging lens according to the above embodiments of the present invention may adopt a plurality of lenses, for example, the above seven lenses. The optical imaging lens has the characteristics of large imaging image surface, wide imaging range and high imaging quality by reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the on-axis distance between each lens and the like, and the ultrathin property of the mobile phone is ensured.
In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspheric mirror surface, i.e., at least one of the object side surface of the first lens to the image side surface of the seventh lens is an aspheric mirror surface. The aspheric lens is characterized in that: the aspherical lens has a better curvature radius characteristic, and has advantages of improving distortion aberration and astigmatic aberration, unlike a spherical lens having a constant curvature from the lens center to the lens periphery, in which the curvature is continuously varied from the lens center to the lens periphery. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the 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 is an aspheric mirror surface. Optionally, each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens has an object-side surface and an image-side surface which are aspheric mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although seven lenses are exemplified in the embodiment, the optical imaging lens is not limited to include seven lenses, and may include other numbers of lenses if necessary.
Specific embodiments of an optical imaging lens suitable for the above-described embodiments are further described below with reference to the drawings.
Detailed description of the preferred embodiment 1
Fig. 1 is a schematic view of a lens assembly according to embodiment 1 of the present invention, wherein the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
As shown in table 1, a basic parameter table of the optical imaging lens of embodiment 1 is shown, in which the units of the curvature radius, the thickness, and the focal length are all millimeters (mm).
Flour mark Surface type Radius of curvature Thickness/distance Focal length Refractive index Coefficient of dispersion Coefficient of cone
OBJ Spherical surface All-round All-round
STO Spherical surface All-round -0.7447
S1 Aspherical surface 2.2088 0.9245 5.04 1.54 56.1 -0.1127
S2 Aspherical surface 9.5993 0.0350 6.7997
S3 Aspherical surface 7.7140 0.2786 -15.08 1.67 19.2 -9.3041
S4 Aspherical surface 4.3315 0.4529 -0.8914
S5 Aspherical surface 47.3739 0.2714 -30.01 1.67 19.2 -35.4008
S6 Aspherical surface 14.1958 0.0630 0.0000
S7 Aspherical surface 20.3234 0.4885 23.07 1.54 56.1 0.0000
S8 Aspherical surface -32.7569 0.4420 0.0000
S9 Aspherical surface 4.8352 0.4000 77.00 1.57 37.3 -0.6078
S10 Aspherical surface 5.2701 0.4414 0.6993
S11 Aspherical surface 6.3060 0.6802 5.05 1.54 55.7 -1.9934
S12 Aspherical surface -4.5763 0.5354 -1.0000
S13 Aspherical surface -2.8565 0.5150 -3.13 1.54 55.7 -1.0000
S14 Aspherical surface 4.3262 0.3666 -0.0491
S15 Spherical surface All-round 0.2100 1.52 64.2
S16 Spherical surface All-round 0.4004
S17 Spherical surface All-round
TABLE 1
As shown in table 2, in embodiment 1, the total effective focal length f of the optical imaging lens is 5.45mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 is 6.50mm, and the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S17 is 5.20 mm.
Figure BDA0002887281430000071
TABLE 2
The optical imaging lens in embodiment 1 satisfies:
ImgH × ImgH/TTL is 4.16mm, where ImgH is half the diagonal length of the effective pixel area on the imaging plane, and TTL is the on-axis distance from the object-side surface of the first lens to the imaging plane;
the TTL/ImgH is 1.25, wherein the TTL is the on-axis distance from the object side surface of the first lens to the imaging surface, and the ImgH is half of the diagonal length of the effective pixel area on the imaging surface;
f × tan (1/2FOV) is 5.11mm, where f is the effective focal length of the optical imaging lens and FOV is the maximum field angle of the optical imaging lens;
f/EPD is 1.65, wherein f is the effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens;
(R11-R12)/f6 is 2.15, where R11 is the radius of curvature of the object-side surface of the sixth lens, R12 is the radius of curvature of the image-side surface of the sixth lens, and f6 is the effective focal length of the sixth lens;
(f1-f7)/f is 1.50, wherein f1 is the effective focal length of the first lens, f7 is the effective focal length of the seventh lens, and f is the effective focal length of the optical imaging lens;
f2/(R4-R3) ═ 4.46, where f2 is the effective focal length of the second lens, R4 is the radius of curvature of the image-side surface of the second lens, and R3 is the radius of curvature of the object-side surface of the second lens;
(CT1+ CT2)/(CT3+ CT4) ═ 1.58, where CT1 is the central thickness of the first lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, CT3 is the central thickness of the third lens on the optical axis, and CT4 is the central thickness of the fourth lens on the optical axis;
(f12-f67)/f34 is 0.22, wherein f12 is the combined focal length of the first lens and the second lens, f67 is the combined focal length of the sixth lens and the seventh lens, and f34 is the combined focal length of the third lens and the fourth lens;
SAG62/SAG52 is 1.77, wherein SAG62 is an on-axis distance between an intersection point of the image side surface of the sixth lens and the optical axis and an effective radius vertex of the image side surface of the sixth lens, and SAG52 is an on-axis distance between an intersection point of the image side surface of the fifth lens and the optical axis and an effective radius vertex of the image side surface of the fifth lens;
SAG71/ET7 is-1.94, where SAG71 is the on-axis distance between the intersection of the seventh lens object-side surface and the optical axis to the effective radius vertex of the seventh lens object-side surface, and ET7 is the edge thickness of the seventh lens;
(ET4+ ET5)/ET6 is 1.23, where ET4 is the edge thickness of the fourth lens, ET5 is the edge thickness of the fifth lens, and ET6 is the edge thickness of the sixth lens.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the seventh lens E7 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
Figure BDA0002887281430000081
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspheric surface.
In example 1, the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric, and table 3 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 through S14 in example 14、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -3.9689E-04 1.5236E-02 -5.9113E-02 1.6045E-01 -2.9142E-01 3.5847E-01 -2.9977E-01
S2 -4.9210E-02 4.5133E-02 7.6334E-02 -3.5267E-01 6.6277E-01 -7.6613E-01 5.7848E-01
S3 -4.9030E-02 6.1369E-02 8.7822E-03 -1.3484E-01 2.3316E-01 -2.8326E-01 3.8387E-01
S4 -6.5322E-03 2.4435E-04 1.1956E-01 -4.6345E-01 1.0192E+00 -1.4548E+00 1.4162E+00
S5 -4.0638E-02 2.9572E-02 -1.1666E-01 2.4594E-01 -3.6575E-01 4.2684E-01 -4.4620E-01
S6 -6.8364E-02 1.2072E-01 -2.8785E-01 4.3644E-01 -4.6511E-01 3.8233E-01 -2.8150E-01
S7 -7.6187E-02 2.1265E-01 -7.2913E-01 2.0759E+00 -4.6789E+00 7.9177E+00 -9.8754E+00
S8 -5.5250E-02 4.2192E-02 -9.1998E-04 -2.3789E-01 7.9706E-01 -1.5208E+00 1.9387E+00
S9 -8.9884E-02 8.9745E-02 -2.3588E-01 5.2863E-01 -8.5243E-01 9.7433E-01 -8.0195E-01
S10 -8.8870E-02 4.2368E-02 -5.8008E-02 8.0659E-02 -8.3697E-02 6.1246E-02 -3.2079E-02
S11 -1.8779E-02 -1.4138E-02 1.2417E-02 -1.2131E-02 9.5923E-03 -4.9797E-03 1.6726E-03
S12 3.2422E-02 -3.7947E-02 4.0755E-02 -4.1945E-02 3.0017E-02 -1.3858E-02 4.2585E-03
S13 -4.3761E-02 1.6783E-02 -1.2782E-02 7.6624E-03 -2.1884E-03 3.0570E-04 -1.1009E-05
S14 -7.2027E-02 3.5762E-02 -1.9408E-02 8.5326E-03 -2.7359E-03 6.2814E-04 -1.0387E-04
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 1.6804E-01 -5.9724E-02 1.0977E-02 2.9723E-04 -6.2881E-04 1.2714E-04 -8.9290E-06
S2 -2.7909E-01 7.4443E-02 -2.0721E-03 -5.8537E-03 2.0456E-03 -3.0806E-04 1.8343E-05
S3 -5.2687E-01 5.4152E-01 -3.7370E-01 1.6791E-01 -4.7221E-02 7.5602E-03 -5.2658E-04
S4 -9.7671E-01 5.0726E-01 -2.1810E-01 8.1811E-02 -2.4233E-02 4.5663E-03 -3.8563E-04
S5 4.5529E-01 -4.2133E-01 3.0917E-01 -1.6279E-01 5.6637E-02 -1.1567E-02 1.0458E-03
S6 2.1588E-01 -1.5552E-01 8.6551E-02 -3.3613E-02 8.6023E-03 -1.3220E-03 9.3402E-05
S7 9.0410E+00 -6.0417E+00 2.9074E+00 -9.8030E-01 2.1972E-01 -2.9405E-02 1.7778E-03
S8 -1.7333E+00 1.1044E+00 -4.9986E-01 1.5719E-01 -3.2666E-02 4.0345E-03 -2.2423E-04
S9 4.7975E-01 -2.0850E-01 6.5075E-02 -1.4196E-02 2.0526E-03 -1.7655E-04 6.8308E-06
S10 1.2150E-02 -3.3129E-03 6.4037E-04 -8.5369E-05 7.4591E-06 -3.8475E-07 8.8975E-09
S11 -3.7558E-04 5.8086E-05 -6.2778E-06 4.7120E-07 -2.3664E-08 7.2133E-10 -1.0150E-11
S12 -8.9977E-04 1.3296E-04 -1.3744E-05 9.7540E-07 -4.5331E-08 1.2438E-09 -1.5289E-11
S13 -3.3042E-06 6.4745E-07 -5.9812E-08 3.3312E-09 -1.1424E-10 2.2346E-12 -1.9170E-14
S14 1.2435E-05 -1.0756E-06 6.6459E-08 -2.8570E-09 8.1140E-11 -1.3684E-12 1.0376E-14
TABLE 3
Fig. 2a shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2b shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2c shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2d shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. As can be seen from fig. 2a to 2d, the optical imaging lens according to embodiment 1 can achieve good imaging quality.
Specific example 2
Fig. 3 is a schematic view of a lens assembly according to embodiment 2 of the present invention, wherein the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
As shown in table 4, the basic parameter table of the optical imaging lens of embodiment 2 is shown, in which the units of the curvature radius, the thickness, and the focal length are all millimeters (mm).
Flour mark Surface type Radius of curvature Thickness/distance Focal length Refractive index Coefficient of dispersion Coefficient of cone
OBJ Spherical surface All-round All-round
STO Spherical surface All-round -0.6950
S1 Aspherical surface 2.2772 0.9550 5.13 1.54 56.1 -0.1312
S2 Aspherical surface 10.3732 0.0345 16.9219
S3 Aspherical surface 8.7338 0.3021 -15.53 1.67 19.2 -12.6914
S4 Aspherical surface 4.7059 0.4590 -2.2739
S5 Aspherical surface 19.0488 0.2424 -32.65 1.67 19.2 7.4089
S6 Aspherical surface 10.1825 0.0597 0.0000
S7 Aspherical surface 13.1530 0.4770 24.52 1.54 56.1 0.0000
S8 Aspherical surface 769.2308 0.4161 0.0000
S9 Aspherical surface 4.5146 0.3732 63.12 1.57 37.3 -3.3074
S10 Aspherical surface 5.0069 0.5402 -0.0348
S11 Aspherical surface 6.5217 0.8193 5.69 1.54 55.7 -4.6534
S12 Aspherical surface -5.4881 0.5604 -0.2397
S13 Aspherical surface -3.0805 0.5763 -3.33 1.54 55.7 -1.1778
S14 Aspherical surface 4.5395 0.2712 -0.2734
S15 Spherical surface All-round 0.2100 1.52 64.2
S16 Spherical surface All-round 0.3020
S17 Spherical surface All-round
TABLE 4
As shown in table 5, in embodiment 2, the total effective focal length f of the optical imaging lens is 5.41mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 is 6.60mm, and the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S17 is 5.20 mm. The parameters of each relation are as explained in the first embodiment, and the values of each relation are as listed in the following table.
Figure BDA0002887281430000101
Figure BDA0002887281430000111
TABLE 5
In example 2, the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric, and table 6 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 through S14 in example 24、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -3.6880E-04 1.3647E-02 -5.1041E-02 1.3355E-01 -2.3381E-01 2.7725E-01 -2.2349E-01
S2 -4.4117E-02 3.8311E-02 6.1351E-02 -2.6838E-01 4.7756E-01 -5.2269E-01 3.7368E-01
S3 -4.3933E-02 5.2053E-02 7.0512E-03 -1.0248E-01 1.6774E-01 -1.9290E-01 2.4745E-01
S4 -5.6282E-03 1.9543E-04 8.8763E-02 -3.1937E-01 6.5191E-01 -8.6381E-01 7.8053E-01
S5 -3.5929E-02 2.4584E-02 -9.1192E-02 1.8077E-01 -2.5278E-01 2.7738E-01 -2.7264E-01
S6 -6.1350E-02 1.0263E-01 -2.3181E-01 3.3297E-01 -3.3614E-01 2.6175E-01 -1.8257E-01
S7 -6.9458E-02 1.8511E-01 -6.0603E-01 1.6475E+00 -3.5455E+00 5.7286E+00 -6.8223E+00
S8 -5.1432E-02 3.7895E-02 -7.9722E-04 -1.9889E-01 6.4297E-01 -1.1836E+00 1.4558E+00
S9 -8.9945E-02 8.9835E-02 -2.3620E-01 5.2951E-01 -8.5415E-01 9.7662E-01 -8.0411E-01
S10 -8.4947E-02 3.9594E-02 -5.2999E-02 7.2050E-02 -7.3095E-02 5.2294E-02 -2.6778E-02
S11 -1.4675E-02 -9.7666E-03 7.5828E-03 -6.5491E-03 4.5777E-03 -2.1008E-03 6.2378E-04
S12 2.3064E-02 -2.2768E-02 2.0624E-02 -1.7903E-02 1.0806E-02 -4.2077E-03 1.0906E-03
S13 -3.2277E-02 1.0631E-02 -6.9534E-03 3.5799E-03 -8.7805E-04 1.0534E-04 -3.2579E-06
S14 -3.9334E-02 6.2808E-03 3.8171E-04 -6.4513E-04 2.1328E-04 -4.0942E-05 5.1651E-06
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 1.2076E-01 -4.1375E-02 7.3301E-03 1.9134E-04 -3.9020E-04 7.6052E-05 -5.1485E-06
S2 -1.7070E-01 4.3112E-02 -1.1362E-03 -3.0392E-03 1.0056E-03 -1.4339E-04 8.0843E-06
S3 -3.2150E-01 3.1279E-01 -2.0433E-01 8.6903E-02 -2.3135E-02 3.5061E-03 -2.3117E-04
S4 -4.9967E-01 2.4088E-01 -9.6136E-02 3.3474E-02 -9.2034E-03 1.6098E-03 -1.2619E-04
S5 2.6158E-01 -2.2762E-01 1.5705E-01 -7.7757E-02 2.5436E-02 -4.8848E-03 4.1527E-04
S6 1.3263E-01 -9.0514E-02 4.7721E-02 -1.7556E-02 4.2564E-03 -6.1966E-04 4.1474E-05
S7 5.9637E+00 -3.8052E+00 1.7484E+00 -5.6288E-01 1.2047E-01 -1.5393E-02 8.8861E-04
S8 -1.2558E+00 7.7199E-01 -3.3713E-01 1.0228E-01 -2.0509E-02 2.4439E-03 -1.3105E-04
S9 4.8120E-01 -2.0921E-01 6.5316E-02 -1.4253E-02 2.0616E-03 -1.7738E-04 6.8654E-06
S10 9.9164E-03 -2.6434E-03 4.9955E-04 -6.5110E-05 5.5619E-06 -2.8049E-07 6.3416E-09
S11 -1.2382E-04 1.6928E-05 -1.6173E-06 1.0731E-07 -4.7641E-09 1.2838E-10 -1.5969E-12
S12 -1.9434E-04 2.4221E-05 -2.1119E-06 1.2641E-07 -4.9549E-09 1.1466E-10 -1.1888E-12
S13 -8.3979E-07 1.4132E-07 -1.1212E-08 5.3630E-10 -1.5795E-11 2.6534E-13 -1.9549E-15
S14 -4.4464E-07 2.6292E-08 -1.0455E-09 2.6184E-11 -3.4382E-13 7.0894E-16 2.4076E-17
TABLE 6
Fig. 4a shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 4b shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4c shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4d shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. As can be seen from fig. 4a to 4d, the optical imaging lens according to embodiment 2 can achieve good imaging quality.
Specific example 3
Fig. 5 is a schematic view of a lens assembly according to embodiment 3 of the present invention, wherein the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
As shown in table 7, the basic parameter table of the optical imaging lens of embodiment 3 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).
Flour mark Surface type Radius of curvature Thickness/distance Focal length Refractive index Coefficient of dispersion Coefficient of cone
OBJ Spherical surface All-round All-round
STO Spherical surface All-round -0.7320
S1 Aspherical surface 2.2087 1.1201 4.89 1.54 56.1 -0.1043
S2 Aspherical surface 10.5048 0.0357 10.9445
S3 Aspherical surface 11.0424 0.3200 -12.24 1.67 19.2 15.1440
S4 Aspherical surface 4.6819 0.3614 3.5985
S5 Aspherical surface 14.5825 0.2251 111.00 1.67 19.2 -90.0000
S6 Aspherical surface 17.9768 0.1249 0.0000
S7 Aspherical surface -58.2257 0.4715 52.97 1.54 56.1 0.0000
S8 Aspherical surface -19.3667 0.4667 0.0000
S9 Aspherical surface 5.1030 0.3926 73.80 1.57 37.3 -5.4950
S10 Aspherical surface 5.6447 0.5201 -1.5728
S11 Aspherical surface 9.1374 0.7032 6.05 1.54 55.7 -0.5099
S12 Aspherical surface -4.8966 0.5260 -1.1581
S13 Aspherical surface -3.1598 0.5678 -3.34 1.54 55.7 -1.0000
S14 Aspherical surface 4.4065 0.2468 -0.0518
S15 Spherical surface All-round 0.2100 1.52 64.2
S16 Spherical surface All-round 0.2669
S17 Spherical surface All-round
TABLE 7
As shown in table 8, in embodiment 3, the total effective focal length f of the optical imaging lens is 5.41mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 is 6.56mm, and the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S17 is 5.20 mm. The parameters of each relation are as explained in the first embodiment, and the values of each relation are as listed in the following table.
Figure BDA0002887281430000131
TABLE 8
In example 3, the object-side surface and the image-side surface of any one of the first lens E1 to the seventh lens E7 are aspheric, and table 9 shows the high-order term coefficients a usable for the aspheric mirror surfaces S1 to S14 in example 34、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Figure BDA0002887281430000132
Figure BDA0002887281430000141
TABLE 9
Fig. 6a shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6b shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6c shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6d shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. As can be seen from fig. 6a to 6d, the optical imaging lens according to embodiment 3 can achieve good imaging quality.
Specific example 4
Fig. 7 is a schematic view of a lens assembly according to embodiment 4 of the present invention, wherein the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
As shown in table 10, the basic parameter table of the optical imaging lens of embodiment 4 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).
Figure BDA0002887281430000142
Figure BDA0002887281430000151
Watch 10
As shown in table 11, in embodiment 4, the total effective focal length f of the optical imaging lens is 5.42mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 is 6.61mm, and the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S17 is 5.20 mm. The parameters of each relation are as explained in the first embodiment, and the values of each relation are as listed in the following table.
Figure BDA0002887281430000152
TABLE 11
In example 4, the object-side surface and the image-side surface of any one of the first lens E1 to the seventh lens E7 are aspheric, and table 12 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 to S14 in example 44、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Figure BDA0002887281430000153
Figure BDA0002887281430000161
TABLE 12
Fig. 8a shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 8b shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8c shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8d shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. As can be seen from fig. 8a to 8d, the optical imaging lens according to embodiment 4 can achieve good imaging quality.
Specific example 5
Fig. 9 is a schematic view of a lens assembly according to embodiment 5 of the present invention, wherein the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
As shown in table 13, the basic parameter table of the optical imaging lens of example 5 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).
Figure BDA0002887281430000162
Figure BDA0002887281430000171
Watch 13
As shown in table 14, in embodiment 5, the total effective focal length f of the optical imaging lens is 5.42mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 is 6.61mm, and the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S17 is 5.20 mm. The parameters of each relation are as explained in the first embodiment, and the values of each relation are as listed in the following table.
Figure BDA0002887281430000172
TABLE 14
In example 5, the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric, and table 15 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 through S14 in example 54、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Figure BDA0002887281430000173
Figure BDA0002887281430000181
Watch 15
Fig. 10a shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 10b shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10c shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10d shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. As can be seen from fig. 10a to 10d, the optical imaging lens according to embodiment 5 can achieve good imaging quality.
Specific example 6
Fig. 11 is a schematic view of a lens assembly according to embodiment 6 of the present invention, wherein the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
As shown in table 16, the basic parameter table of the optical imaging lens of example 6 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).
Flour mark Surface type Radius of curvature Thickness/distance Focal length Refractive index Coefficient of dispersion Coefficient of cone
OBJ Spherical surface All-round All-round
STO Spherical surface All-round -0.7300
S1 Aspherical surface 2.2369 0.9921 5.25 1.54 56.1 -0.0541
S2 Aspherical surface 8.6354 0.0342 0.4993
S3 Aspherical surface 6.8504 0.2599 -17.79 1.67 19.2 -0.1557
S4 Aspherical surface 4.3010 0.5170 3.1767
S5 Aspherical surface -32.9068 0.2543 -53.32 1.67 19.2 90.0000
S6 Aspherical surface -370.3704 0.0677 0.0000
S7 Aspherical surface -85.3314 0.3800 27.76 1.54 56.1 0.0000
S8 Aspherical surface -12.8826 0.4910 0.0000
S9 Aspherical surface 4.3493 0.4104 114.87 1.57 37.3 -8.0637
S10 Aspherical surface 4.4989 0.4808 -6.9874
S11 Aspherical surface 7.4888 0.8173 6.12 1.54 55.7 -4.3059
S12 Aspherical surface -5.6351 0.5834 -0.5814
S13 Aspherical surface -3.2492 0.5749 -3.43 1.54 55.7 -1.2143
S14 Aspherical surface 4.4972 0.2484 -0.0641
S15 Spherical surface All-round 0.2100 1.52 64.2
S16 Spherical surface All-round 0.2685
S17 Spherical surface All-round
TABLE 16
As shown in table 17, in embodiment 6, the total effective focal length f of the optical imaging lens is 5.42mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 is 6.59mm, and the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S17 is 5.20 mm. The parameters of each relation are as explained in the first embodiment, and the values of each relation are as listed in the following table.
Figure BDA0002887281430000191
TABLE 17
In example 6, the object-side surface and the image-side surface of any one of the first lens element E1 to the seventh lens element E7 are aspheric, and table 18 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 to S14 in example 64、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -3.3620E-04 1.1878E-02 -4.2416E-02 1.0596E-01 -1.7713E-01 2.0054E-01 -1.5434E-01
S2 -4.5960E-02 4.0737E-02 6.6585E-02 -2.9730E-01 5.3994E-01 -6.0320E-01 4.4015E-01
S3 -4.6643E-02 5.6944E-02 7.9482E-03 -1.1903E-01 2.0075E-01 -2.3787E-01 3.1442E-01
S4 -6.6421E-03 2.5054E-04 1.2362E-01 -4.8320E-01 1.0715E+00 -1.5424E+00 1.5140E+00
S5 -3.7639E-02 2.6360E-02 -1.0008E-01 2.0305E-01 -2.9061E-01 3.2640E-01 -3.2837E-01
S6 -6.1542E-02 1.0311E-01 -2.3326E-01 3.3557E-01 -3.3930E-01 2.6463E-01 -1.8486E-01
S7 -6.4595E-02 1.6601E-01 -5.2413E-01 1.3740E+00 -2.8516E+00 4.4433E+00 -5.1029E+00
S8 -5.0947E-02 3.7360E-02 -7.8227E-04 -1.9424E-01 6.2496E-01 -1.1450E+00 1.4017E+00
S9 -6.2549E-02 5.2097E-02 -1.1422E-01 2.1354E-01 -2.8725E-01 2.7389E-01 -1.8805E-01
S10 -5.9421E-02 2.3164E-02 -2.5933E-02 2.9486E-02 -2.5018E-02 1.4970E-02 -6.4113E-03
S11 -1.4191E-02 -9.2881E-03 7.0916E-03 -6.0232E-03 4.1402E-03 -1.8684E-03 5.4558E-04
S12 2.1894E-02 -2.1058E-02 1.8585E-02 -1.5718E-02 9.2438E-03 -3.5070E-03 8.8559E-04
S13 -2.9120E-02 9.1101E-03 -5.6597E-03 2.7677E-03 -6.4479E-04 7.3475E-05 -2.1584E-06
S14 -3.6589E-02 4.1294E-03 1.3290E-03 -1.0152E-03 3.3973E-04 -7.3133E-05 1.0861E-05
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 7.9628E-02 -2.6048E-02 4.4061E-03 1.0981E-04 -2.1381E-04 3.9789E-05 -2.5718E-06
S2 -2.0522E-01 5.2902E-02 -1.4231E-03 -3.8851E-03 1.3121E-03 -1.9096E-04 1.0989E-05
S3 -4.2092E-01 4.2197E-01 -2.8402E-01 1.2447E-01 -3.4142E-02 5.3317E-03 -3.6221E-04
S4 -1.0529E+00 5.5142E-01 -2.3907E-01 9.0432E-02 -2.7010E-02 5.1324E-03 -4.3707E-04
S5 3.2246E-01 -2.8719E-01 2.0282E-01 -1.0278E-01 3.4412E-02 -6.7639E-03 5.8854E-04
S6 1.3451E-01 -9.1938E-02 4.8547E-02 -1.7888E-02 4.3436E-03 -6.3334E-04 4.2456E-05
S7 4.3017E+00 -2.6469E+00 1.1729E+00 -3.6413E-01 7.5150E-02 -9.2605E-03 5.1553E-04
S8 -1.2034E+00 7.3630E-01 -3.2002E-01 9.6638E-02 -1.9285E-02 2.2872E-03 -1.2207E-04
S9 9.3847E-02 -3.4024E-02 8.8584E-03 -1.6120E-03 1.9443E-04 -1.3951E-05 4.5028E-07
S10 1.9857E-03 -4.4271E-04 6.9974E-05 -7.6278E-06 5.4497E-07 -2.2986E-08 4.3465E-10
S11 -1.0650E-04 1.4319E-05 -1.3453E-06 8.7780E-08 -3.8323E-09 1.0155E-10 -1.2423E-12
S12 -1.5376E-04 1.8671E-05 -1.5861E-06 9.2500E-08 -3.5326E-09 7.9651E-11 -8.0461E-13
S13 -5.2847E-07 8.4470E-08 -6.3655E-09 2.8920E-10 -8.0903E-12 1.2909E-13 -9.0336E-16
S14 -1.1425E-06 8.5954E-08 -4.6013E-09 1.7133E-10 -4.2202E-12 6.1856E-14 -4.0864E-16
Watch 18
Fig. 12a shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 12b shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 12c shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12d shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. As can be seen from fig. 12a to 12d, the optical imaging lens according to embodiment 6 can achieve good imaging quality.
Specific example 7
Fig. 13 is a schematic view of a lens assembly according to embodiment 7 of the present invention, wherein the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
As shown in table 19, the basic parameter table of the optical imaging lens of example 7 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).
Flour mark Surface type Radius of curvature Thickness/distance Focal length Refractive index Coefficient of dispersion Coefficient of cone
OBJ Spherical surface All-round All-round
STO Spherical surface All-round -0.7200
S1 Aspherical surface 2.2415 0.9871 5.24 1.54 56.1 -0.0522
S2 Aspherical surface 8.7638 0.0340 1.0146
S3 Aspherical surface 7.0647 0.2583 -18.05 1.67 19.2 0.2319
S4 Aspherical surface 4.4117 0.5221 3.4391
S5 Aspherical surface -33.4712 0.2398 -54.32 1.67 19.2 90.0000
S6 Aspherical surface -370.3704 0.0680 0.0000
S7 Aspherical surface -52.1052 0.3800 27.28 1.54 56.1 0.0000
S8 Aspherical surface -11.6043 0.5220 0.0000
S9 Aspherical surface 4.3084 0.4149 -129.81 1.57 37.3 -11.1222
S10 Aspherical surface 3.9291 0.4214 -10.7588
S11 Aspherical surface 5.8934 0.8426 5.88 1.54 55.7 -12.6195
S12 Aspherical surface -6.4522 0.6226 1.0353
S13 Aspherical surface -3.3019 0.5665 -3.49 1.54 55.7 -1.1909
S14 Aspherical surface 4.5921 0.2403 -0.0692
S15 Spherical surface All-round 0.2100 1.52 64.2
S16 Spherical surface All-round 0.2604
S17 Spherical surface All-round
Watch 19
As shown in table 20, in embodiment 7, the total effective focal length f of the optical imaging lens is 5.43mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 is 6.59mm, and the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S17 is 5.20 mm. The parameters of each relation are as explained in the first embodiment, and the values of each relation are as listed in the following table.
Figure BDA0002887281430000211
Figure BDA0002887281430000221
Watch 20
In example 7, the object-side surface and the image-side surface of any one of the first lens element E1 to the seventh lens element E7 are aspheric, and table 21 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 to S14 in example 74、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -3.4265E-04 1.2222E-02 -4.4061E-02 1.1112E-01 -1.8753E-01 2.1434E-01 -1.6655E-01
S2 -4.6483E-02 4.1434E-02 6.8108E-02 -3.0582E-01 5.5857E-01 -6.2754E-01 4.6052E-01
S3 -4.6918E-02 5.7448E-02 8.0421E-03 -1.2079E-01 2.0431E-01 -2.4281E-01 3.2189E-01
S4 -6.5798E-03 2.4702E-04 1.2131E-01 -4.7194E-01 1.0416E+00 -1.4923E+00 1.4580E+00
S5 -3.8992E-02 2.7794E-02 -1.0740E-01 2.2179E-01 -3.2309E-01 3.6934E-01 -3.7819E-01
S6 -6.3354E-02 1.0770E-01 -2.4721E-01 3.6083E-01 -3.7017E-01 2.9292E-01 -2.0762E-01
S7 -6.7092E-02 1.7573E-01 -5.6543E-01 1.5107E+00 -3.1953E+00 5.0741E+00 -5.9389E+00
S8 -5.2182E-02 3.8727E-02 -8.2064E-04 -2.0622E-01 6.7151E-01 -1.2451E+00 1.5427E+00
S9 -6.1593E-02 5.0907E-02 -1.1076E-01 2.0548E-01 -2.7428E-01 2.5951E-01 -1.7682E-01
S10 -5.8969E-02 2.2901E-02 -2.5541E-02 2.8929E-02 -2.4453E-02 1.4576E-02 -6.2188E-03
S11 -1.3771E-02 -8.8785E-03 6.6777E-03 -5.5870E-03 3.7830E-03 -1.6818E-03 4.8375E-04
S12 2.1731E-02 -2.0823E-02 1.8309E-02 -1.5428E-02 9.0389E-03 -3.4164E-03 8.5951E-04
S13 -2.8744E-02 8.9343E-03 -5.5146E-03 2.6792E-03 -6.2014E-04 7.0210E-05 -2.0491E-06
S14 -3.6665E-02 4.8320E-03 7.1245E-04 -7.0782E-04 2.4069E-04 -5.1166E-05 7.3998E-06
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 8.6743E-02 -2.8647E-02 4.8919E-03 1.2308E-04 -2.4195E-04 4.5455E-05 -2.9661E-06
S2 -2.1593E-01 5.5979E-02 -1.5144E-03 -4.1578E-03 1.4121E-03 -2.0669E-04 1.1961E-05
S3 -4.3219E-01 4.3454E-01 -2.9334E-01 1.2893E-01 -3.5470E-02 5.5553E-03 -3.7851E-04
S4 -1.0092E+00 5.2602E-01 -2.2699E-01 8.5456E-02 -2.5404E-02 4.8045E-03 -4.0722E-04
S5 3.7800E-01 -3.4265E-01 2.4629E-01 -1.2703E-01 4.3291E-02 -8.6606E-03 7.6700E-04
S6 1.5328E-01 -1.0630E-01 5.6950E-02 -2.1291E-02 5.2455E-03 -7.7602E-04 5.2781E-05
S7 5.1023E+00 -3.1996E+00 1.4449E+00 -4.5718E-01 9.6162E-02 -1.2077E-02 6.8517E-04
S8 -1.3404E+00 8.2996E-01 -3.6508E-01 1.1157E-01 -2.2533E-02 2.7046E-03 -1.4608E-04
S9 8.7562E-02 -3.1502E-02 8.1389E-03 -1.4697E-03 1.7591E-04 -1.2525E-05 4.0116E-07
S10 1.9188E-03 -4.2615E-04 6.7101E-05 -7.2868E-06 5.1863E-07 -2.1792E-08 4.1050E-10
S11 -9.3022E-05 1.2320E-05 -1.1402E-06 7.3290E-08 -3.1519E-09 8.2277E-11 -9.9144E-13
S12 -1.4868E-04 1.7987E-05 -1.5223E-06 8.8444E-08 -3.3652E-09 7.5592E-11 -7.6076E-13
S13 -4.9846E-07 7.9158E-08 -5.9266E-09 2.6752E-10 -7.4352E-12 1.1787E-13 -8.1950E-16
S14 -7.4981E-07 5.3862E-08 -2.7343E-09 9.6038E-11 -2.2222E-12 3.0488E-14 -1.8795E-16
TABLE 21
Fig. 14a shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 14b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 7. Fig. 14c shows a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values corresponding to different image heights. Fig. 14d shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 7, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. As can be seen from fig. 14a to 14d, the optical imaging lens according to embodiment 7 can achieve good imaging quality.
Specific example 8
Fig. 15 is a schematic view of a lens assembly according to embodiment 8 of the present invention, wherein the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
As shown in table 22, the basic parameter table of the optical imaging lens of embodiment 8 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).
Flour mark Surface type Radius of curvature Thickness/distance Focal length Refractive index Coefficient of dispersion Coefficient of cone
OBJ Spherical surface All-round All-round
STO Spherical surface All-round -0.7280
S1 Aspherical surface 2.2373 1.0109 5.15 1.54, 56.1 -0.0682
S2 Aspherical surface 9.2397 0.0340 3.5465
S3 Aspherical surface 7.8313 0.2785 -16.73 1.67 19.2 0.3449
S4 Aspherical surface 4.5651 0.4880 3.0987
S5 Aspherical surface -174.9439 0.2375 -55.65 1.67 19.2 90.0000
S6 Aspherical surface 48.0896 0.0707 0.0000
S7 Aspherical surface -125.0000 0.4113 28.99 1.54 56.1 0.0000
S8 Aspherical surface -14.0558 0.4931 0.0000
S9 Aspherical surface 4.7140 0.4108 128.61 1.57 37.3 -6.1419
S10 Aspherical surface 4.8783 0.4621 -5.4430
S11 Aspherical surface 7.3087 0.7940 6.02 1.54 55.7 -6.6978
S12 Aspherical surface -5.5667 0.5804 -0.2177
S13 Aspherical surface -3.1828 0.5737 -3.38 1.54 55.7 -1.1407
S14 Aspherical surface 4.4823 0.2525 -0.0623
S15 Spherical surface All-round 0.2100 1.52 64.2
S16 Spherical surface All-round 0.2725
S17 Spherical surface All-round
TABLE 22
As shown in table 23, in embodiment 8, the total effective focal length f of the optical imaging lens is 5.43mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 is 6.58mm, and the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S17 is 5.20 mm. The parameters of each relation are as explained in the first embodiment, and the values of each relation are as listed in the following table.
Figure BDA0002887281430000241
TABLE 23
In example 8, the object-side surface and the image-side surface of any one of the first lens E1 to the seventh lens E7 are aspheric, and table 24 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 to S14 in example 84、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Figure BDA0002887281430000242
Figure BDA0002887281430000251
Watch 24
Fig. 16a shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 8, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 16b shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 8. Fig. 16c shows a distortion curve of the optical imaging lens of embodiment 8, which represents distortion magnitude values corresponding to different image heights. Fig. 16d shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 8, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. As can be seen from fig. 16a to 16d, the optical imaging lens according to embodiment 8 can achieve good imaging quality.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, improvements, equivalents, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (22)

1. An optical imaging lens, in order from an object side to an image side along an optical axis, comprising:
a first lens having a positive optical power;
a second lens having an optical power;
a third lens having optical power;
a fourth lens having a positive optical power;
a fifth lens element with a focal power, wherein the object-side surface of the fifth lens element is convex and the image-side surface of the fifth lens element is concave;
the sixth lens with positive focal power has a convex object-side surface and a convex image-side surface;
a seventh lens having a negative optical power;
wherein, the half ImgH of the diagonal length of the effective pixel area on the imaging surface and the on-axis distance TTL from the object side surface of the first lens to the imaging surface satisfy: 4.0mm < ImgH × ImgH/TTL <6.0 mm; the combined focal length f12 of the first and second lenses, the combined focal length f67 of the sixth and seventh lenses and the combined focal length f34 of the third and fourth lenses satisfy: -1.0< (f12-f67)/f34< 1.0.
2. The optical imaging lens according to claim 1, characterized in that: the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy that: TTL/ImgH < 1.3.
3. The optical imaging lens according to claim 1, characterized in that: the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens meet the following conditions: 4.8mm < f × tan (1/2FOV) <5.8 mm.
4. The optical imaging lens according to claim 1, characterized in that: the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the following conditions: f/EPD < 1.7.
5. The optical imaging lens according to claim 1, characterized in that: a radius of curvature R11 of the sixth lens object-side surface, a radius of curvature R12 of the sixth lens image-side surface, and an effective focal length f6 of the sixth lens satisfy: 2.0< (R11-R12)/f6< 2.5.
6. The optical imaging lens according to claim 1, characterized in that: an effective focal length f1 of the first lens, an effective focal length f7 of the seventh lens, and an effective focal length f of the optical imaging lens satisfy: 1.4< (f1-f7)/f < 1.8.
7. The optical imaging lens according to claim 1, characterized in that: an effective focal length f2 of the second lens, a radius of curvature R4 of the image-side surface of the second lens, and a radius of curvature R3 of the object-side surface of the second lens satisfy: 1.9< f2/(R4-R3) < 7.1.
8. The optical imaging lens according to claim 1, characterized in that: a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT4 of the fourth lens on the optical axis satisfy: 1.4< (CT1+ CT2)/(CT3+ CT4) < 2.2.
9. The optical imaging lens according to claim 1, characterized in that: an on-axis distance SAG62 between an intersection point of the sixth lens image-side surface and the optical axis and an effective radius vertex of the sixth lens image-side surface and an on-axis distance SAG52 between an intersection point of the fifth lens image-side surface and the optical axis and an effective radius vertex of the fifth lens image-side surface satisfy: 1.6< SAG62/SAG52< 2.4.
10. The optical imaging lens according to claim 1, characterized in that: an on-axis distance SAG71 between an intersection of the seventh lens object-side surface and the optical axis to an effective radius vertex of the seventh lens object-side surface and an edge thickness ET7 of the seventh lens satisfy: -3.6< SAG71/ET7< -1.3.
11. The optical imaging lens according to claim 1, characterized in that: the edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens and the edge thickness ET6 of the sixth lens satisfy the following conditional expressions: 0.7< (ET4+ ET5)/ET6< 1.4.
12. An optical imaging lens, in order from an object side to an image side along an optical axis, comprising:
a first lens having a positive optical power;
a second lens having an optical power;
a third lens having optical power;
a fourth lens having a positive optical power;
a fifth lens element with a focal power, wherein the object-side surface of the fifth lens element is convex and the image-side surface of the fifth lens element is concave;
the sixth lens with positive focal power has a convex object-side surface and a convex image-side surface;
a seventh lens having a negative optical power;
wherein, the half ImgH of the diagonal length of the effective pixel area on the imaging surface and the on-axis distance TTL from the object side surface of the first lens to the imaging surface satisfy: 4.0mm < ImgH × ImgH/TTL <6.0 mm; an on-axis distance SAG62 between an intersection point of the sixth lens image-side surface and the optical axis and an effective radius vertex of the sixth lens image-side surface and an on-axis distance SAG52 between an intersection point of the fifth lens image-side surface and the optical axis and an effective radius vertex of the fifth lens image-side surface satisfy: 1.6< SAG62/SAG52< 2.4.
13. The optical imaging lens according to claim 12, characterized in that: the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy that: TTL/ImgH < 1.3.
14. The optical imaging lens according to claim 12, characterized in that: the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens meet the following conditions: 4.8mm < f × tan (1/2FOV) <5.8 mm.
15. The optical imaging lens according to claim 12, characterized in that: the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the following conditions: f/EPD < 1.7.
16. The optical imaging lens according to claim 12, characterized in that: a radius of curvature R11 of the sixth lens object-side surface, a radius of curvature R12 of the sixth lens image-side surface, and an effective focal length f6 of the sixth lens satisfy: 2.0< (R11-R12)/f6< 2.5.
17. The optical imaging lens according to claim 12, characterized in that: an effective focal length f1 of the first lens, an effective focal length f7 of the seventh lens, and an effective focal length f of the optical imaging lens satisfy: 1.4< (f1-f7)/f < 1.8.
18. The optical imaging lens according to claim 12, characterized in that: an effective focal length f2 of the second lens, a radius of curvature R4 of the image-side surface of the second lens, and a radius of curvature R3 of the object-side surface of the second lens satisfy: 1.9< f2/(R4-R3) < 7.1.
19. The optical imaging lens according to claim 12, characterized in that: a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT4 of the fourth lens on the optical axis satisfy: 1.4< (CT1+ CT2)/(CT3+ CT4) < 2.2.
20. The optical imaging lens according to claim 12, characterized in that: the combined focal length f12 of the first and second lenses, the combined focal length f67 of the sixth and seventh lenses and the combined focal length f34 of the third and fourth lenses satisfy: -1.0< (f12-f67)/f34< 1.0.
21. The optical imaging lens according to claim 12, characterized in that: an on-axis distance SAG71 between an intersection of the seventh lens object-side surface and the optical axis to an effective radius vertex of the seventh lens object-side surface and an edge thickness ET7 of the seventh lens satisfy: -3.6< SAG71/ET7< -1.3.
22. The optical imaging lens according to claim 12, characterized in that: the edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens and the edge thickness ET6 of the sixth lens satisfy the following conditional expressions: 0.7< (ET4+ ET5)/ET6< 1.4.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114839749A (en) * 2022-07-05 2022-08-02 江西联益光学有限公司 Optical lens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114839749A (en) * 2022-07-05 2022-08-02 江西联益光学有限公司 Optical lens

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