CN213986999U - Camera lens group - Google Patents

Camera lens group Download PDF

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CN213986999U
CN213986999U CN202120106715.0U CN202120106715U CN213986999U CN 213986999 U CN213986999 U CN 213986999U CN 202120106715 U CN202120106715 U CN 202120106715U CN 213986999 U CN213986999 U CN 213986999U
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lens
image
satisfy
lens group
optical axis
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王彦
肖海东
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 a lens assembly makes a video recording, the lens assembly makes a video recording includes according to the preface by thing side to picture side along the optical axis: a diaphragm; a first lens having an optical power; a second lens having an optical power; a third lens having optical power; wherein, half of the Semi-FOV of the maximum field angle of the camera lens group and the effective focal length f of the camera lens group satisfy: 1.00mm‑1<tan2(Semi‑FOV)/f<1.50mm‑1(ii) a The effective focal length f of the camera lens group and the distance BFL from the image side surface of the third lens to the imaging surface of the camera lens group on the optical axis satisfy: 1.00<f/BFL<3.00; an on-axis distance SAG22 between the intersection point of the second lens image-side surface and the optical axis and the effective radius vertex of the second lens image-side surface and an on-axis distance SAG21 between the intersection point of the second lens object-side surface and the optical axis and the effective radius vertex of the second lens object-side surface satisfy: -4.00<SAG22/SAG21<3.00. The utility model provides a lens group of making a video recording can provide infrared visible light focus camera lens altogether, is guaranteeing on the basis of camera lens miniaturization, has characteristics such as large aperture, big wide angle.

Description

Camera lens group
Technical Field
The utility model belongs to the optical imaging field especially relates to a camera lens group including three lens.
Background
With the popularization of portable electronic products such as mobile phones and tablet computers, people increasingly need diversified functions of the products. Meanwhile, with the development of scientific technology, the 3D camera shooting technology is more and more mature and widely applied to portable electronic products.
In order to meet the demand of market development, an infrared and visible light co-focusing lens is needed, and the infrared and visible light co-focusing lens has the characteristics of large aperture, large wide angle and the like on the basis of ensuring the miniaturization of the lens.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a camera lens group that three lens are constituteed, this camera lens group can provide infrared visible light focus camera lens altogether, is guaranteeing on the miniaturized basis of camera lens, has characteristics such as large aperture, big wide angle.
An aspect of the present invention provides a camera lens assembly, which comprises, along an optical axis, a lens barrel assembly including, in order from an object side to an image side: a diaphragm, a first lens having a focal power; a second lens having an optical power; a third lens having optical power.
Wherein, half of the Semi-FOV of the maximum field angle of the camera lens group and the effective focal length f of the camera lens group satisfy: 1.00mm-1<tan2(Semi-FOV)/f<1.50mm-1(ii) a An on-axis distance SAG22 between the intersection point of the second lens image-side surface and the optical axis and the effective radius vertex of the second lens image-side surface and an on-axis distance SAG21 between the intersection point of the second lens object-side surface and the optical axis and the effective radius vertex of the second lens object-side surface satisfy: -4.00<SAG22/SAG21<3.00; the F number Fno of the camera lens group meets the following requirements: fno is less than or equal to 1.56.
According to the utility model discloses an embodiment, the effective focal length f of the lens group of making a video recording satisfies with the image side of third lens to the distance BFL of the imaging plane of the lens group of making a video recording on the optical axis: 1.00< f/BFL < 3.00.
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 is less than or equal to 1.61.
According to an embodiment of the present invention, the combined focal length f12 of the first and second lenses and the curvature radius R4 of the image side surface of the second lens satisfy: -5.00< f12/R4< -1.00.
According to an embodiment of the present invention, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R2 of the image-side surface of the first lens satisfy: 0.00< R3/R2< 3.00.
According to an embodiment of the present invention, the central thickness CT1 of the first lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy: 0.50< CT1/CT3< 3.00.
According to an embodiment of the present invention, the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens satisfy: 1.00< (ET2+ ET3)/(ET3-ET2) < 5.00.
According to an embodiment of the present invention, the conditional expression that the effective radius DT31 of the object-side surface of the third lens and the effective radius DT32 of the image-side surface of the third lens satisfy is: 4.00< (DT31+ DT32)/(DT32-DT31) < 9.00.
According to an embodiment of the present invention, the total sum Σ AT of the air space on the optical axis between any two adjacent lenses having refractive power in the first to third lenses and the distance TD on the optical axis between the first lens object-side surface and the third lens image-side surface satisfy: Σ AT/TD < 0.30.
According to the utility model discloses an embodiment, the combination focus f23 of second lens and third lens satisfies with the effective focal length f of the camera lens group: 0.50< f23/f < 7.00.
Another aspect of the present invention is to provide a photographing lens assembly, which includes, from an object side to an image side along an optical axis according to a predetermined order: a diaphragm; a first lens having an optical power; a second lens having an optical power; a third lens having optical power.
Wherein, each lens is independent, and there is air space on the optical axis between each lens; half of the Semi-FOV of the maximum field angle of the image pickup lens group and the effective focal length f of the image pickup lens group satisfy: 1.00mm-1<tan2(Semi-FOV)/f<1.50mm-1(ii) a An on-axis distance SAG22 between the intersection point of the second lens image-side surface and the optical axis and the effective radius vertex of the second lens image-side surface and an on-axis distance SAG21 between the intersection point of the second lens object-side surface and the optical axis and the effective radius vertex of the second lens object-side surface satisfy: -4.00<SAG22/SAG21<3.00; the combined focal length f12 of the first lens and the second lens and the curvature radius R4 of the image side surface of the second lens meet the following conditions: -5.00<f12/R4<-1.00。
The utility model has the advantages that:
the utility model provides a lens group of making a video recording includes multi-disc lens, like first lens to third lens. The camera lens group can provide an infrared and visible light co-focusing lens, and has the characteristics of large aperture, large wide angle and the like on the basis of ensuring the miniaturization of the lens.
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 embodiment 1 of the lens assembly for camera of the present invention;
fig. 3 is a schematic view of a lens assembly according to embodiment 2 of the present invention;
fig. 4a to 4d are an axial chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, according to embodiment 2 of the lens assembly for camera of the present invention;
fig. 5 is a schematic view of a lens assembly according to embodiment 3 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 lens assembly for camera of the present invention;
fig. 7 is a schematic view of a lens assembly according to embodiment 4 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 lens assembly for camera of the present invention;
fig. 9 is a schematic view of a lens assembly according to embodiment 5 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 lens assembly for camera of the present invention;
fig. 11 is a schematic view of a lens assembly according to embodiment 6 of the photographing lens assembly of the present invention;
fig. 12a to 12d are an axial chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, according to embodiment 6 of the lens assembly for camera of the present invention;
fig. 13 is a schematic view of a lens assembly according to embodiment 7 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 lens assembly for camera 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 magnification chromatic aberration curve, respectively, according to embodiment 8 of the lens assembly for camera of the present invention;
fig. 17 is a schematic view of a lens assembly according to embodiment 9 of the present invention;
fig. 18a to 18d respectively show an axial chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens assembly of embodiment 9 of the present invention.
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 image capturing lens assembly of the exemplary embodiment of the present invention comprises three lens elements, which are sequentially disposed from an object side to an image side along an optical axis: the lens comprises a diaphragm, a first lens, a second lens and a third 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 may have a positive power or a negative power; the second lens may have a positive or negative optical power; the third lens may have a positive power or a negative power.
In the present exemplary embodiment, the condition that half of the Semi-FOV of the maximum angle of view of the image capturing lens group and the effective focal length f of the image capturing lens group satisfy is: 1.00mm-1<tan2(Semi-FOV)/f<1.50mm-1. By restricting the maximum vision of the camera lens groupThe ratio of the half field angle to the effective focal length of the lens group can effectively control the field angle of the camera lens group, is beneficial to obtaining a larger field range, improves the collection capability of the camera lens group on object information, and realizes the wide-angle imaging effect of the camera lens group. More specifically, Semi-FOV and f satisfy: 1.05mm-1<tan2(Semi-FOV)/f<1.42mm-1E.g. 1.08mm-1≤tan2(Semi-FOV)/f≤1.41mm-1。
In the present exemplary embodiment, the conditional expression that the effective focal length f of the image pickup lens group and the distance BFL on the optical axis from the image side surface of the third lens to the imaging surface of the image pickup lens group satisfy is: 1.00< f/BFL < 3.00. The distance from the image side surface of the third lens to the imaging surface of the camera lens group on the optical axis is restrained within a reasonable range, so that a margin can be left for the structure, and the processing is facilitated. More specifically, f and BFL satisfy: 1.5< f/BFL <2.2, e.g., 1.60 ≦ f/BFL ≦ 2.16.
In the present exemplary embodiment, the conditional expression that the on-axis distance SAG22 between the intersection point of the second lens image-side surface and the optical axis to the effective radius vertex of the second lens image-side surface and the on-axis distance SAG21 between the intersection point of the second lens object-side surface and the optical axis to the effective radius vertex of the second lens object-side surface satisfy: -4.00< SAG22/SAG21< 3.00. More specifically, SAG22 and SAG21 satisfy: -3.9< SAG22/SAG21<2.8, for example, -3.81 ≦ SAG22/SAG21 ≦ 2.78.
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 is less than or equal to 1.61. By controlling the ratio of the total optical length to the image height of the photographing lens group, the total size of the photographing lens group can be effectively reduced, and the ultrathin characteristic and the miniaturization of the photographing lens group are realized. More specifically, TTL and ImgH satisfy: 1.5 ≦ TTL/ImgH ≦ 1.61, e.g., 1.57 ≦ TTL/ImgH ≦ 1.61.
In the present exemplary embodiment, the F-number Fno of the image-taking lens group satisfies the conditional expression: fno is less than or equal to 1.56. Through the F number of the reasonable constraint camera lens group, the camera lens group can be ensured to have a large-aperture imaging effect, and the camera lens group also has good imaging quality in a dark environment. More specifically, Fno satisfies: 1.50. ltoreq. Fno.ltoreq.1.56, for example, Fno 1.56.
In the present exemplary embodiment, the combined focal length f12 of the first and second lenses and the curvature radius R4 of the image-side surface of the second lens satisfy the conditional expression: -5.00< f12/R4< -1.00. Through the ratio of the combined focal length of the first and second lenses of the camera lens group and the curvature radius of the image side surface of the second lens, the astigmatism of the camera lens group can be effectively controlled, and the imaging quality of an off-axis field of view can be improved. More specifically, f12 and R4 satisfy: -4.9< f12/R4< -1.3, for example, -4.85. ltoreq. f 12/R4. ltoreq. 1.35.
In the present exemplary embodiment, the conditional expression that the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R2 of the image-side surface of the first lens satisfy is: 0.00< R3/R2< 3.00. The curvature radius of the lens is reasonably configured, so that CRA matching of the lens is ensured, curvature of field of the lens is corrected, and imaging definition requirements of each view field are met. More specifically, R3 and R2 satisfy: 0.5< R3/R2<2.5, e.g., 0.55. ltoreq. R3/R2. ltoreq.2.44.
In the present exemplary embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy the conditional expression: 0.50< CT1/CT3< 3.00. By controlling the ratio of the central thickness of the first lens and the third lens, the distortion of the camera lens group can be reasonably regulated and controlled, and finally the distortion of the camera lens group is in a certain range. More specifically, CT1 and CT3 satisfy: 0.9< CT1/CT3<2.3, e.g., 0.94. ltoreq. CT1/CT 3. ltoreq.2.22.
In the present exemplary embodiment, the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens satisfy the conditional expression: 1.00< (ET2+ ET3)/(ET3-ET2) < 5.00. By restricting the ratio of the sum of the difference of the edge thicknesses of the second lens and the third lens within a certain range, the aberration of the off-axis field of view can be reasonably controlled, so that the imaging camera lens group has good imaging quality. More specifically, ET2 and ET3 satisfy: 1.4< (ET2+ ET3)/(ET3-ET2) <4.9, for example, 1.49 ≦ (ET2+ ET3)/(ET3-ET2) ≦ 4.86.
In the present exemplary embodiment, the effective radius DT31 of the object-side surface of the third lens and the effective radius DT32 of the image-side surface of the third lens satisfy the conditional expression: 4.00< (DT31+ DT32)/(DT32-DT31) < 9.00. The difference between the sum of the effective semi-calibers of the object side surface and the image side surface of the third lens is reasonably controlled within a certain range, so that the third lens can meet the requirement of machinability. More specifically, DT31 and DT32 satisfy: 4.3< (DT31+ DT32)/(DT32-DT31) <8.7, e.g., 4.35 ≦ (DT31+ DT32)/(DT32-DT31) ≦ 8.63.
In the present exemplary embodiment, a conditional expression that a sum Σ AT of air intervals on the optical axis between any adjacent two lenses having optical powers of the first to third lenses and a distance TD on the optical axis between the first lens object-side surface to the third lens image-side surface satisfy: Σ AT/TD < 0.30. The reasonable distribution lens group air gap of making a video recording can guarantee processing and equipment characteristic, avoids appearing the clearance undersize and leads to the lens to interfere the scheduling problem around the assembling process appears. Meanwhile, the light deflection is favorably slowed down, the curvature of field of the camera lens group is adjusted, the sensitivity is reduced, and the better imaging quality is obtained. More specifically, Σ AT and TD satisfy: 0< ∑ AT/TD <0.29, e.g., 0.04 ≦ Σ AT/TD ≦ 0.28.
In the present exemplary embodiment, the combined focal length f23 of the second lens and the third lens and the effective focal length f of the image pickup lens group satisfy the conditional expression: 0.50< f23/f < 7.00. By reasonably controlling the combined focal length of the second lens and the third lens within a certain range, the contribution of the aberration of the two lenses can be controlled to balance with the aberration generated by the front-end optical element, so that the aberration of the shooting lens group is in a reasonable horizontal state. More specifically, f23 and f satisfy: 0.60< f23/f <6.98, e.g., 0.65. ltoreq. f 23/f. ltoreq.6.95.
In the present exemplary embodiment, the above-described photographing lens group 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 above-mentioned image pickup lens group may further include a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element on the image plane.
The camera lens assembly according to the above embodiments of the present invention can adopt a plurality of lenses, such as the above three lenses. 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 are reasonably distributed, so that the camera lens group has a larger imaging image surface, has the characteristics of wide imaging range and high imaging quality, and ensures the ultrathin property of the mobile phone.
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 third 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 the object-side surface and the image-side surface of each of the first lens, the second lens, and the third lens is an aspheric mirror surface. Optionally, the object-side surface and the image-side surface of each of the first lens, the second lens and the third lens are aspheric mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses constituting the imaging lens group can be varied to achieve the various results and advantages described in this specification without departing from the claimed subject matter. For example, although three lenses are exemplified in the embodiment, the image pickup lens group is not limited to include three lenses, and the image pickup lens group may include other numbers of lenses if necessary.
Specific embodiments of an image pickup lens group 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 image capturing lens assembly 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 filter E4, and an image forming surface S9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex 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. Filter E4 has an object side S7 and an image side S8. The light from the object sequentially passes through the respective surfaces S1 to S8 and is finally imaged on the imaging plane S9.
As shown in table 1, the basic parameter table of the imaging lens group of embodiment 1 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).
Figure BDA0002899549950000061
Figure BDA0002899549950000071
TABLE 1
As shown in table 2, in embodiment 1, the total effective focal length f of the image pickup lens group is 0.92mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S9 is 1.50mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S9 is 0.93mm, and the half semifov of the maximum field angle of the optical imaging system is 44.9 °.
Figure BDA0002899549950000072
TABLE 2
The imaging lens group in embodiment 1 satisfies:
tan2(Semi-FOV)/f＝1.08mm-1wherein, Semi-FOV is half of the maximum field angle of the camera lens group, and f is the effective focal length of the camera lens group;
f/BFL is 1.73, wherein f is the effective focal length of the camera lens group, and BFL is the distance from the image side surface of the third lens to the imaging surface of the camera lens group on the optical axis;
SAG22/SAG21 is 2.54, wherein SAG22 is the on-axis distance between the intersection point of the image side surface of the second lens and the optical axis and the effective radius vertex of the image side surface of the second lens, and SAG21 is the on-axis distance between the intersection point of the object side surface of the second lens and the optical axis and the effective radius vertex of the object side surface of the second lens;
the TTL/ImgH is 1.61, 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;
fno is 1.56, wherein Fno is the F number of the image pickup lens group;
f12/R4 is-1.35, wherein f12 is the composite focal length of the first lens and the second lens, and R4 is the curvature radius of the image side surface of the second lens;
R3/R2 is 1.55, where R3 is the radius of curvature of the object-side surface of the second lens and R2 is the radius of curvature of the image-side surface of the first lens;
CT1/CT3 is 1.37, where CT1 is the central thickness of the first lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis;
(ET2+ ET3)/(ET3-ET2) ═ 4.68, where ET2 is the edge thickness of the second lens and ET3 is the edge thickness of the third lens;
(DT31+ DT32)/(DT32-DT31) ═ 6.30, where DT31 is the effective radius of the object-side surface of the third lens and DT32 is the effective radius of the image-side surface of the third lens;
Σ AT/TD is 0.17, where Σ AT is a sum of air intervals on the optical axis between any two adjacent lenses having refractive powers of the first lens to the third lens, and TD is a distance on the optical axis between the object side surface of the first lens and the image side surface of the third lens;
f23/f is 4.55, where f23 is the combined focal length of the second lens and the third lens, and f is the effective focal length of the imaging lens group.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the third lens E3 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 BDA0002899549950000081
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 E1 through the third lens E3 are aspheric, and table 3 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 through S6 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 -3.0459E+00 1.2955E+02 -7.4323E+03 2.3852E+05 -4.7366E+06 5.8493E+07 -4.3343E+08
S2 6.2726E-01 -9.9400E+01 3.1937E+03 -5.8710E+04 6.5352E+05 -4.3028E+06 1.6240E+07
S3 3.4819E+00 -2.2831E+01 2.2087E+02 1.7965E+03 -3.5687E+04 2.7184E+05 -1.2632E+06
S4 6.2656E+00 -1.6351E+02 3.3314E+03 -4.5886E+04 4.1899E+05 -2.4604E+06 8.8789E+06
S5 -2.6444E+00 1.9554E+02 -1.5892E+04 6.2118E+05 -1.5086E+07 2.4812E+08 -2.8792E+09
S6 -5.2724E+00 -1.2902E+01 1.0299E+03 -1.8870E+04 2.0602E+05 -1.5048E+06 7.6783E+06
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 1.7513E+09 -2.9507E+09 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 -3.2422E+07 2.6534E+07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 3.3649E+06 -3.8050E+06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -1.7726E+07 1.4744E+07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 2.4034E+10 -1.4500E+11 6.2670E+11 -1.8911E+12 3.7809E+12 -4.4961E+12 2.4042E+12
S6 -2.7902E+07 7.2537E+07 -1.3371E+08 1.7038E+08 -1.4250E+08 7.0294E+07 -1.5481E+07
TABLE 3
Fig. 2a shows a chromatic aberration curve on the axis of the image-taking lens group of embodiment 1, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 2b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 1. Fig. 2c shows a distortion curve of the image capturing lens group of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2d shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2a to 2d, the imaging lens assembly of 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 image capturing lens assembly 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 filter E4, and an image forming surface S9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a convex 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. Filter E4 has an object side S7 and an image side S8. The light from the object sequentially passes through the respective surfaces S1 to S8 and is finally imaged on the imaging plane S9.
As shown in table 4, the basic parameter table of the imaging lens group of embodiment 2 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 0.0436
S1 Aspherical surface 1.8449 0.2907 1.10 1.55 56.1 0.0000
S2 Aspherical surface -0.8334 0.1571 0.0000
S3 Aspherical surface -0.6498 0.3064 -1.41 1.55 56.1 0.0000
S4 Aspherical surface -5.0123 0.0200 0.0000
S5 Aspherical surface 0.3167 0.2497 1.09 1.67 20.4 -1.0000
S6 Aspherical surface 0.3902 0.2079 -1.0000
S7 Spherical surface All-round 0.1100 1.52 64.2
S8 Spherical surface All-round 0.1582
S9 Spherical surface All-round
TABLE 4
As shown in table 5, in embodiment 2, the total effective focal length f of the image pickup lens group is 0.92mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S9 is 1.50mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S9 is 0.93mm, and the half semifov of the maximum field angle of the optical imaging system is 45.1 °. 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 BDA0002899549950000091
TABLE 5
In example 2, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspheric, and table 6 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 to S6 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 -2.4473E+00 7.3265E+01 -4.4387E+03 1.4959E+05 -3.1621E+06 4.1617E+07 -3.2687E+08
S2 1.6215E-01 -6.2347E+01 1.7734E+03 -2.8972E+04 2.9002E+05 -1.7137E+06 5.7772E+06
S3 3.0700E+00 -4.8822E+01 1.1145E+03 -1.6810E+04 1.9750E+05 -1.5428E+06 7.2900E+06
S4 -4.6523E+01 1.4007E+03 -2.8006E+04 3.7691E+05 -3.4080E+06 2.0388E+07 -7.7257E+07
S5 -4.4891E+01 1.5090E+03 -4.6985E+04 1.2121E+06 -2.4577E+07 3.7849E+08 -4.3579E+09
S6 -5.3643E+00 -4.2056E+01 1.5706E+03 -2.2805E+04 2.0660E+05 -1.2774E+06 5.5846E+06
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 1.3889E+09 -2.4417E+09 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 -1.0262E+07 7.4526E+06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 -1.8783E+07 2.0105E+07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 1.6780E+08 -1.5902E+08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 3.7220E+10 -2.3372E+11 1.0619E+12 -3.3891E+12 7.1946E+12 -9.1077E+12 5.1943E+12
S6 -1.7526E+07 3.9562E+07 -6.3562E+07 7.0785E+07 -5.1844E+07 2.2427E+07 -4.3363E+06
TABLE 6
Fig. 4a shows a chromatic aberration curve on the axis of the image-taking lens group of embodiment 2, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 4b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 2. Fig. 4c shows a distortion curve of the image capturing lens group of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4d shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4a to 4d, the imaging lens assembly according to embodiment 2 can achieve good imaging quality.
Specific example 3
Fig. 5 is a schematic view of the lens assembly according to embodiment 3 of the present invention, wherein the image capturing lens assembly 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 filter E4, and an image forming surface S9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a convex 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. Filter E4 has an object side S7 and an image side S8. The light from the object sequentially passes through the respective surfaces S1 to S8 and is finally imaged on the imaging plane S9.
As shown in table 7, the basic parameter table of the imaging lens group according to embodiment 3 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).
Figure BDA0002899549950000101
Figure BDA0002899549950000111
TABLE 7
As shown in table 8, in embodiment 3, the total effective focal length f of the image pickup lens group is 0.90mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S9 is 1.50mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S9 is 0.93mm, and the half semifov of the maximum field angle of the optical imaging system is 45.8 °. 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 BDA0002899549950000112
TABLE 8
In example 3, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspheric, and table 9 shows the high-order term coefficients a usable for the aspheric mirror surfaces S1 to S6 in example 34、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Figure BDA0002899549950000113
Figure BDA0002899549950000121
TABLE 9
Fig. 6a shows a on-axis chromatic aberration curve of the image-taking lens group of embodiment 3, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 6b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 3. Fig. 6c shows a distortion curve of the image capturing lens group of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6d shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 3, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6a to 6d, the imaging lens assembly according to embodiment 3 can achieve good imaging quality.
Specific example 4
Fig. 7 is a schematic view of the lens assembly according to embodiment 4 of the present invention, wherein the image capturing lens assembly 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 filter E4, and an image forming surface S9.
The first lens element E1 has positive power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex 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. Filter E4 has an object side S7 and an image side S8. The light from the object sequentially passes through the respective surfaces S1 to S8 and is finally imaged on the imaging plane S9.
As shown in table 10, the basic parameter table of the imaging lens group according to embodiment 4 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 0.0459
S1 Aspherical surface -1.9448 0.3035 1.06 1.55 56.1 -34.9382
S2 Aspherical surface -0.4679 0.2478 -0.5195
S3 Aspherical surface -0.4606 0.2000 5.49 1.55 56.1 -0.2454
S4 Aspherical surface -0.4599 0.0200 -0.6758
S5 Aspherical surface 0.5205 0.2000 10.96 1.67 20.4 -0.4577
S6 Aspherical surface 0.4755 0.2793 -0.8811
S7 Spherical surface All-round 0.1100 1.52 64.2
S8 Spherical surface All-round 0.1393
S9 Spherical surface All-round
Watch 10
As shown in table 11, in embodiment 4, the total effective focal length f of the image pickup lens group is 0.85mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S9 is 1.50mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S9 is 0.93mm, and the half semifov of the maximum field angle of the optical imaging system is 47.5 °. 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 BDA0002899549950000131
TABLE 11
In example 4, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspheric, and table 12 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 to S6 in example 44、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 2.3071E+01 -7.6772E+03 1.1826E+06 -1.0973E+08 6.6244E+09 -2.7330E+11 7.9408E+12
S2 1.0390E+01 -1.3592E+03 1.0303E+05 -5.0212E+06 1.6689E+08 -3.9159E+09 6.6066E+10
S3 5.3305E+00 5.5713E+01 -4.6193E+03 1.9669E+05 -5.7061E+06 1.1800E+08 -1.7730E+09
S4 3.5668E+00 -3.9319E+01 -5.5097E+03 4.1429E+05 -1.4414E+07 3.0779E+08 -4.4093E+09
S5 -4.2621E+00 3.5724E+02 -2.3160E+04 8.6206E+05 -2.0829E+07 3.4508E+08 -4.0490E+09
S6 -1.3838E+00 3.0455E+01 -6.8103E+02 5.7153E+03 -1.9345E+04 -4.3334E+04 7.6829E+05
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 -1.6510E+14 2.4656E+15 -2.6215E+16 1.9350E+17 -9.4153E+17 2.7137E+18 -3.5065E+18
S2 -8.0699E+11 7.1170E+12 -4.4717E+13 1.9463E+14 -5.5638E+14 9.3786E+14 -7.0549E+14
S3 1.9492E+10 -1.5627E+11 9.0045E+11 -3.6215E+12 9.6269E+12 -1.5171E+13 1.0715E+13
S4 4.4065E+10 -3.1179E+11 1.5573E+12 -5.3735E+12 1.2190E+13 -1.6362E+13 9.8448E+12
S5 3.4218E+10 -2.0909E+11 9.1545E+11 -2.7995E+12 5.6767E+12 -6.8564E+12 3.7327E+12
S6 -3.9174E+06 1.1726E+07 -2.2838E+07 2.9323E+07 -2.3980E+07 1.1327E+07 -2.3521E+06
TABLE 12
Fig. 8a shows a on-axis chromatic aberration curve of the image-taking lens group of embodiment 4, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 8b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 4. Fig. 8c shows a distortion curve of the image capturing lens group of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8d shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8a to 8d, the imaging lens assembly according to embodiment 4 can achieve good imaging quality.
Specific example 5
Fig. 9 is a schematic view of the lens assembly according to embodiment 5 of the present invention, wherein the image capturing lens assembly 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 filter E4, and an image forming surface S9.
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 positive power, and has a convex object-side surface S3 and a convex 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. Filter E4 has an object side S7 and an image side S8. The light from the object sequentially passes through the respective surfaces S1 to S8 and is finally imaged on the imaging plane S9.
As shown in table 13, the basic parameter table of the imaging lens group according to embodiment 5 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 0.0597
S1 Aspherical surface 0.8264 0.3191 12.92 1.55 56.1 2.2177
S2 Aspherical surface 0.8095 0.0346 -56.5476
S3 Aspherical surface 1.9753 0.3741 0.70 1.55 56.1 -99.0000
S4 Aspherical surface -0.4389 0.0200 -1.1357
S5 Aspherical surface 0.7783 0.2000 -1.71 1.67 20.4 -0.2344
S6 Aspherical surface 0.4127 0.2648 -1.1251
S7 Spherical surface All-round 0.1100 1.52 64.2
S8 Spherical surface All-round 0.1584
S9 Spherical surface All-round
Watch 13
As shown in table 14, in embodiment 5, the total effective focal length f of the image pickup lens group is 0.92mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S9 is 1.48mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S9 is 0.93mm, and the half semifov of the maximum field angle of the optical imaging system is 45.0 °. 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 BDA0002899549950000141
TABLE 14
In example 5, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspheric, and table 15 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 to S6 in example 54、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Figure BDA0002899549950000142
Figure BDA0002899549950000151
Watch 15
Fig. 10a shows a on-axis chromatic aberration curve of the image-taking lens group of embodiment 5, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 10b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 5. Fig. 10c shows a distortion curve of the image capturing lens group of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10d shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 5, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 10a to 10d, the imaging lens assembly according to embodiment 5 can achieve good imaging quality.
Specific example 6
Fig. 11 is a schematic view of the lens assembly according to embodiment 6 of the present invention, wherein the image capturing lens assembly 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 filter E4, and an image forming surface S9.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex 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. Filter E4 has an object side S7 and an image side S8. The light from the object sequentially passes through the respective surfaces S1 to S8 and is finally imaged on the imaging plane S9.
As shown in table 16, the basic parameter table of the imaging lens group according to embodiment 6 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).
Figure BDA0002899549950000152
Figure BDA0002899549950000161
TABLE 16
As shown in table 17, in embodiment 6, the total effective focal length f of the image pickup lens group is 0.92mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S9 is 1.50mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S9 is 0.93mm, and the half semifov of the maximum field angle of the optical imaging system is 45.0 °. 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 BDA0002899549950000162
TABLE 17
In example 6, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspheric, and table 18 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 to S6 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 1.9829E+00 -1.0818E+03 1.5573E+05 -1.3173E+07 7.1228E+08 -2.6061E+10 6.6757E+11
S2 1.4222E+00 3.2182E+02 -2.4165E+04 8.0824E+05 -1.6448E+07 2.1586E+08 -1.8809E+09
S3 -4.4620E+00 1.5603E+03 -1.3658E+05 7.0162E+06 -2.3989E+08 5.7101E+09 -9.6865E+10
S4 -2.1908E+00 -2.6766E+02 2.6385E+04 -1.2013E+06 3.5762E+07 -7.5175E+08 1.1542E+10
S5 -8.3272E+00 1.5231E+01 -6.4081E+02 9.8473E+04 -3.8076E+06 8.0875E+07 -1.1141E+09
S6 -7.1997E+00 4.7351E+01 -2.6361E+02 2.0499E+03 -2.2244E+04 1.8699E+05 -1.0476E+06
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 -1.2192E+13 1.5956E+14 -1.4839E+15 9.5639E+15 -4.0564E+16 1.0172E+17 -1.1414E+17
S2 1.1050E+10 -4.3693E+10 1.1336E+11 -1.7996E+11 1.4331E+11 -9.8721E+09 -4.3794E+10
S3 1.1836E+12 -1.0420E+13 6.5402E+13 -2.8513E+14 8.1981E+14 -1.3969E+15 1.0679E+15
S4 -1.3155E+11 1.1164E+12 -6.9782E+12 3.1228E+13 -9.4658E+13 1.7390E+14 -1.4598E+14
S5 1.0562E+10 -7.0365E+10 3.2926E+11 -1.0601E+12 2.2368E+12 -2.7847E+12 1.5506E+12
S6 3.9575E+06 -1.0274E+07 1.8390E+07 -2.2323E+07 1.7549E+07 -8.0623E+06 1.6431E+06
Watch 18
Fig. 12a shows a on-axis chromatic aberration curve of the image-taking lens group of embodiment 6, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 12b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 6. Fig. 12c shows a distortion curve of the image capturing lens group of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12d shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 6, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 12a to 12d, the imaging lens assembly according to embodiment 6 can achieve good imaging quality.
Specific example 7
Fig. 13 is a schematic view of the lens assembly according to embodiment 7 of the present invention, wherein the image capturing lens assembly 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 filter E4, and an image forming surface S9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave 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. Filter E4 has an object side S7 and an image side S8. The light from the object sequentially passes through the respective surfaces S1 to S8 and is finally imaged on the imaging plane S9.
As shown in table 19, the basic parameter table of the imaging lens group according to embodiment 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 0.0315
S1 Aspherical surface 1.2713 0.2823 1.09 1.55 56.1 -0.5415
S2 Aspherical surface -1.0175 0.1365 -0.5699
S3 Aspherical surface -0.7998 0.2763 -0.44 1.55 56.1 0.6728
S4 Aspherical surface 0.3819 0.0204 -23.7402
S5 Aspherical surface 0.2079 0.2996 0.39 1.67 20.4 -2.4737
S6 Aspherical surface 0.4760 0.1426 -0.7147
S7 Spherical surface All-round 0.1100 1.52 64.2
S8 Spherical surface All-round 0.1986
S9 Spherical surface All-round
Watch 19
As shown in table 20, in embodiment 7, the total effective focal length f of the image pickup lens group is 0.92mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S9 is 1.47mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S9 is 0.93mm, and the half semifov of the maximum field angle of the optical imaging system is 45.0 °. 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 BDA0002899549950000171
Figure BDA0002899549950000181
Watch 20
In example 7, both the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 were asphericTable 21 shows the high-order coefficient A which can be used for each of the aspherical mirror surfaces S1-S6 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 -3.5876E+00 4.4955E+02 -5.6565E+04 4.4855E+06 -2.3749E+08 8.6247E+09 -2.1898E+11
S2 8.6431E-02 -7.6779E+01 1.8638E+03 -9.1370E+03 -6.1111E+05 1.7796E+07 -2.4689E+08
S3 6.0105E-01 -5.6329E+00 6.0106E+03 -4.9862E+05 2.2356E+07 -6.5264E+08 1.3328E+10
S4 -5.3508E+01 3.4131E+02 8.8286E+04 -5.9205E+06 2.1404E+08 -5.1349E+09 8.6825E+10
S5 -5.9812E+01 2.4705E+03 -8.9593E+04 2.7735E+06 -6.9893E+07 1.3701E+09 -2.0297E+10
S6 4.8959E-01 -2.0641E+02 4.2498E+03 -5.1334E+04 4.1361E+05 -2.3238E+06 9.2822E+06
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 3.9307E+12 -4.9991E+13 4.4641E+14 -2.7303E+15 1.0868E+16 -2.5310E+16 2.6116E+16
S2 2.1042E+09 -1.1822E+10 4.4666E+10 -1.1238E+11 1.8045E+11 -1.6717E+11 6.7897E+10
S3 -1.9572E+11 2.0780E+12 -1.5795E+13 8.3688E+13 -2.9315E+14 6.0953E+14 -5.6922E+14
S4 -1.0589E+12 9.3614E+12 -5.9453E+13 2.6433E+14 -7.8080E+14 1.3761E+15 -1.0949E+15
S5 2.2345E+11 -1.8036E+12 1.0485E+13 -4.2616E+13 1.1472E+14 -1.8358E+14 1.3210E+14
S6 -2.6501E+07 5.3682E+07 -7.5442E+07 7.0284E+07 -3.9686E+07 1.1086E+07 -7.2820E+05
TABLE 21
Fig. 14a shows a on-axis chromatic aberration curve of the image-taking lens group of embodiment 7, which represents the deviation of the convergent focus 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 image pickup lens group of embodiment 7. Fig. 14c shows a distortion curve of the image capturing lens group of embodiment 7, which represents distortion magnitude values corresponding to different image heights. Fig. 14d shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 7, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 14a to 14d, the imaging lens assembly according to embodiment 7 can achieve good imaging quality.
Specific example 8
Fig. 15 is a schematic view of the lens assembly according to embodiment 8 of the present invention, wherein the image capturing lens assembly 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 filter E4, and an image forming surface S9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex 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. Filter E4 has an object side S7 and an image side S8. The light from the object sequentially passes through the respective surfaces S1 to S8 and is finally imaged on the imaging plane S9.
As shown in table 22, the basic parameter table of the imaging lens group according to 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 0.0430
S1 Aspherical surface 1.7986 0.3119 1.02 1.55 56.1 23.7989
S2 Aspherical surface -0.7548 0.1465 -0.1865
S3 Aspherical surface -0.5425 0.3245 0.38 1.55 56.1 -0.1006
S4 Aspherical surface -0.1821 0.0200 -3.4244
S5 Aspherical surface -0.7062 0.2218 -0.39 1.67 20.4 -35.4592
S6 Aspherical surface 0.4570 0.1643 -0.7171
S7 Spherical surface All-round 0.1100 1.52 64.2
S8 Spherical surface All-round 0.2011
S9 Spherical surface All-round
TABLE 22
As shown in table 23, in embodiment 8, the total effective focal length f of the image pickup lens group is 0.91mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S9 is 1.50mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S9 is 0.93mm, and the half semifov of the maximum field angle of the optical imaging system is 45.5 °. 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 BDA0002899549950000191
TABLE 23
In the case of the embodiment 8, the following,the object-side surface and the image-side surface of any of the first lens element E1 through the third lens element E3 were aspheric, and table 24 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 through S6 in example 84、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Figure BDA0002899549950000192
Figure BDA0002899549950000201
Watch 24
Fig. 16a shows a on-axis chromatic aberration curve of the image-taking lens group of embodiment 8, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 16b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 8. Fig. 16c shows a distortion curve of the image capturing lens group of embodiment 8, which represents distortion magnitude values corresponding to different image heights. Fig. 16d shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 8, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 16a to 16d, the imaging lens assembly according to embodiment 8 can achieve good imaging quality.
Specific example 9
Fig. 17 is a schematic view of the lens assembly according to embodiment 9 of the present invention, wherein the image capturing lens assembly 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 filter E4, and an image forming surface S9.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex 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. Filter E4 has an object side S7 and an image side S8. The light from the object sequentially passes through the respective surfaces S1 to S8 and is finally imaged on the imaging plane S9.
As shown in table 25, the basic parameter table of the imaging lens group according to embodiment 9 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 0.0456
S1 Aspherical surface 1.7276 0.2931 0.94 1.55 56.1 19.2974
S2 Aspherical surface -0.6771 0.1497 -1.9118
S3 Aspherical surface -0.4898 0.3395 0.35 1.55 56.1 0.0677
S4 Aspherical surface -0.1710 0.1072 -1.7623
S5 Aspherical surface -0.1463 0.2000 -0.51 1.67 20.4 -11.2662
S6 Aspherical surface -0.4005 0.1166 -98.9519
S7 Spherical surface All-round 0.1100 1.52 64.2
S8 Spherical surface All-round 0.1839
S9 Spherical surface All-round
TABLE 25
As shown in table 26, in embodiment 9, the total effective focal length f of the image pickup lens group is 0.89mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S9 is 1.50mm, the half ImgH of the diagonal line length of the effective pixel region on the imaging surface S17 is 0.93mm, and the half semifov of the maximum field angle of the optical imaging system is 45.8 °. 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 BDA0002899549950000211
Watch 26
In example 9, the object-side surface and the image-side surface of any one of the first lens E1 to the third lens E3 are aspheric, and table 27 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 to S6 in example 94、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -5.8058E+00 -1.0708E+02 9.2280E+04 -1.2446E+07 9.1202E+08 -4.3162E+10 1.4058E+12
S2 2.4642E+01 -5.4984E+03 6.3564E+05 -4.6201E+07 2.2666E+09 -7.8283E+10 1.9501E+12
S3 -2.0286E+01 2.7514E+03 -2.3434E+05 1.3044E+07 -4.8660E+08 1.2618E+10 -2.3332E+11
S4 2.3862E+01 -1.0279E+03 2.9041E+04 -4.2220E+05 -1.6706E+06 2.1466E+08 -4.8852E+09
S5 -4.7563E+00 1.2295E+03 -5.8156E+04 1.6601E+06 -3.2679E+07 4.6268E+08 -4.8004E+09
S6 1.5180E+01 -2.6987E+02 3.5613E+03 -3.6091E+04 2.7325E+05 -1.5269E+06 6.2693E+06
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 -3.2384E+13 5.3184E+14 -6.1818E+15 4.9622E+16 -2.6133E+17 8.1163E+17 -1.1255E+18
S2 -3.5432E+13 4.6964E+14 -4.4882E+15 3.0094E+16 -1.3424E+17 3.5752E+17 -4.2995E+17
S3 3.1208E+12 -3.0285E+13 2.1126E+14 -1.0326E+15 3.3574E+15 -6.5236E+15 5.7319E+15
S4 6.4205E+10 -5.5748E+11 3.3051E+12 -1.3286E+13 3.4713E+13 -5.3247E+13 3.6412E+13
S5 3.6753E+10 -2.0709E+11 8.4727E+11 -2.4457E+12 4.7178E+12 -5.4530E+12 2.8536E+12
S6 -1.8843E+07 4.1135E+07 -6.4207E+07 6.9584E+07 -4.9602E+07 2.0869E+07 -3.9205E+06
Watch 27
Fig. 18a shows a on-axis chromatic aberration curve of the image-taking lens group of embodiment 9, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 18b shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 9. Fig. 18c shows a distortion curve of the image capturing lens group of embodiment 9, which represents distortion magnitude values corresponding to different image heights. Fig. 18d shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 9, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 18a to 18d, the imaging lens assembly according to embodiment 9 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 (20)

1. An image capturing lens assembly, in order from an object side to an image side along an optical axis, comprising:
a diaphragm;
a first lens having an optical power;
a second lens having an optical power;
a third lens having optical power;
wherein a half Semi-FOV of a maximum field angle of the photographing lens group and an effective focal length f of the photographing lens group satisfy: 1.00mm-1<tan2(Semi-FOV)/f<1.50mm-1(ii) a An on-axis distance SAG22 between the intersection point of the second lens image side surface and the optical axis and the effective radius vertex of the second lens image side surface and an on-axis distance SAG21 between the intersection point of the second lens object side surface and the optical axis and the effective radius vertex of the second lens object side surface satisfy: -4.00<SAG22/SAG21<3.00; the F number Fno of the camera lens group meets the following requirements: fno is less than or equal to 1.56.
2. The image capturing lens group of claim 1, wherein: the effective focal length f of the camera lens group and the distance BFL from the image side surface of the third lens to the imaging surface of the camera lens group on the optical axis satisfy: 1.00< f/BFL < 3.00.
3. The image capturing lens group of claim 1, wherein: 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 is less than or equal to 1.61.
4. The image capturing lens group of claim 1, wherein: the combined focal length f12 of the first lens and the second lens and the curvature radius R4 of the image side surface of the second lens meet the following conditions: -5.00< f12/R4< -1.00.
5. The image capturing lens group of claim 1, wherein: a radius of curvature R3 of the second lens object-side surface and a radius of curvature R2 of the first lens image-side surface satisfy: 0.00< R3/R2< 3.00.
6. The image capturing lens group of claim 1, wherein: the central thickness CT1 of the first lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy that: 0.50< CT1/CT3< 3.00.
7. The image capturing lens group of claim 1, wherein: the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens satisfy: 1.00< (ET2+ ET3)/(ET3-ET2) < 5.00.
8. The image capturing lens group of claim 1, wherein: the effective radius DT31 of the object side surface of the third lens and the effective radius DT32 of the image side surface of the third lens satisfy the following conditional expression: 4.00< (DT31+ DT32)/(DT32-DT31) < 9.00.
9. The image capturing lens group of claim 1, wherein: the sum Sigma AT of the air intervals on the optical axis between any two adjacent lenses with optical power in the first lens to the third lens and the distance TD on the optical axis between the object side surface of the first lens and the image side surface of the third lens satisfy that: Σ AT/TD < 0.30.
10. The image capturing lens group of claim 1, wherein: the combined focal length f23 of the second lens and the third lens and the effective focal length f of the image pickup lens group satisfy: 0.50< f23/f < 7.00.
11. An image capturing lens assembly, in order from an object side to an image side along an optical axis, comprising:
a diaphragm;
a first lens having an optical power;
a second lens having an optical power;
a third lens having optical power;
wherein a half Semi-FOV of a maximum field angle of the photographing lens group and an effective focal length f of the photographing lens group satisfy: 1.00m<tan2(Semi-FOV)/f<1.50 m; what is needed isThe on-axis distance SAG22 between the intersection point of the second lens image side surface and the optical axis and the effective radius vertex of the second lens image side surface and the on-axis distance SAG21 between the intersection point of the second lens object side surface and the optical axis and the effective radius vertex of the second lens object side surface satisfy that: -4.00<SAG22/SAG21<3.00; the combined focal length f12 of the first lens and the second lens and the curvature radius R4 of the image side surface of the second lens meet the following conditions: -5.00<f12/R4<-1.00。
12. The image capturing lens assembly of claim 11, wherein: the effective focal length f of the camera lens group and the distance BFL from the image side surface of the third lens to the imaging surface of the camera lens group on the optical axis satisfy: 1.00< f/BFL < 3.00.
13. The image capturing lens assembly of claim 11, wherein: 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 is less than or equal to 1.61.
14. The image capturing lens assembly of claim 11, wherein: the F number Fno of the camera lens group meets the following requirements: fno is less than or equal to 1.56.
15. The image capturing lens assembly of claim 11, wherein: a radius of curvature R3 of the second lens object-side surface and a radius of curvature R2 of the first lens image-side surface satisfy: 0.00< R3/R2< 3.00.
16. The image capturing lens assembly of claim 11, wherein: the central thickness CT1 of the first lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy that: 0.50< CT1/CT3< 3.00.
17. The image capturing lens assembly of claim 11, wherein: the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens satisfy: 1.00< (ET2+ ET3)/(ET3-ET2) < 5.00.
18. The image capturing lens assembly of claim 11, wherein: the effective radius DT31 of the object side surface of the third lens and the effective radius DT32 of the image side surface of the third lens satisfy the following conditional expression: 4.00< (DT31+ DT32)/(DT32-DT31) < 9.00.
19. The image capturing lens assembly of claim 11, wherein: the sum Sigma AT of the air intervals on the optical axis between any two adjacent lenses with optical power in the first lens to the third lens and the distance TD on the optical axis between the object side surface of the first lens and the image side surface of the third lens satisfy that: Σ AT/TD < 0.30.
20. The image capturing lens assembly of claim 11, wherein: the combined focal length f23 of the second lens and the third lens and the effective focal length f of the image pickup lens group satisfy: 0.50< f23/f < 7.00.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112684589A (en) * 2021-01-15 2021-04-20 浙江舜宇光学有限公司 Camera lens group
CN114815155A (en) * 2022-04-24 2022-07-29 惠州市星聚宇光学有限公司 Optical lens and optical lens module

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112684589A (en) * 2021-01-15 2021-04-20 浙江舜宇光学有限公司 Camera lens group
CN114815155A (en) * 2022-04-24 2022-07-29 惠州市星聚宇光学有限公司 Optical lens and optical lens module

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