CN110187477B - Optical imaging lens - Google Patents
Optical imaging lens Download PDFInfo
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- CN110187477B CN110187477B CN201910610205.4A CN201910610205A CN110187477B CN 110187477 B CN110187477 B CN 110187477B CN 201910610205 A CN201910610205 A CN 201910610205A CN 110187477 B CN110187477 B CN 110187477B
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- 238000012634 optical imaging Methods 0.000 title claims abstract description 166
- 230000003287 optical effect Effects 0.000 claims abstract description 60
- 238000003384 imaging method Methods 0.000 claims description 50
- 230000004075 alteration Effects 0.000 description 40
- 201000009310 astigmatism Diseases 0.000 description 15
- 230000014509 gene expression Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0035—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having three lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Abstract
The application provides an optical imaging lens, which sequentially comprises the following components from an object side to an image side along an optical axis: a first lens with positive focal power, the object side surface of which is a convex surface; a second lens having positive optical power, the object side surface of which is a convex surface; the object side surface of the third lens is a concave surface; half of the half-FOV of the maximum field angle of the optical imaging lens satisfies 0.4 < tan (half-FOV) < 0.9; the center thickness CT2 of the second lens on the optical axis and the center thickness CT3 of the third lens on the optical axis satisfy 0.7 < CT2/CT3 < 1.2.
Description
Technical Field
The present application relates to an optical imaging lens, and in particular, to an optical imaging lens including three lenses.
Background
At present, the requirements on the imaging function of the portable electronic equipment are higher and higher, and although the image is processed by combining an image processing algorithm, the optical characteristics of the optical imaging lens directly influence the imaging quality of an initial image, so that the requirements on the performance of the optical imaging lens matched with the portable electronic equipment are also higher and higher. Portable electronic devices such as mobile phones are generally lighter and thinner, and have small installation space for components therein, and an optical imaging lens having a small size and good image quality is desired.
Disclosure of Invention
The present application provides an optical imaging lens device, e.g. an optical imaging lens comprising three lenses, which at least solves or partly solves at least one of the above-mentioned drawbacks of the prior art.
In one aspect, the present application provides an optical imaging lens, which may include, in order from an object side to an image side along an optical axis: a first lens with positive focal power, the object side surface of which is a convex surface; a second lens having positive optical power, the object side surface of which is a convex surface; the object side surface of the third lens with the focal power is a concave surface.
According to an embodiment of the present application, half of the maximum field angle Semi-FOV of the optical imaging lens may satisfy 0.4 < tan (Semi-FOV) < 0.9.
According to the embodiment of the application, the center thickness CT2 of the second lens on the optical axis and the center thickness CT3 of the third lens on the optical axis can meet 0.7 < CT2/CT3 < 1.2.
According to the embodiment of the application, the edge thickness ET3 of the third lens and the maximum effective radius DT31 of the object side surface of the third lens can satisfy 0.5 < ET3/DT31 < 1.
According to an embodiment of the present application, an on-axis distance SAG11 between an intersection point of the object side surface of the first lens and the optical axis and an effective radius vertex of the object side surface of the first lens and an on-axis distance SAG22 between an intersection point of the image side surface of the second lens and the optical axis and an effective radius vertex of the image side surface of the second lens may satisfy 0.1 < SAG22/SAG11 < 0.6.
According to an embodiment of the present application, an on-axis distance SAG31 between an intersection point of the object side surface of the third lens and the optical axis and an effective radius vertex of the object side surface of the third lens and an on-axis distance SAG32 between an intersection point of the image side surface of the third lens and the optical axis and an effective radius vertex of the image side surface of the third lens may satisfy 0.5 < SAG32/SAG31 < 1.2.
According to an embodiment of the present application, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy 0.5 < (f 2-f 1)/(f2+f1) < 1.
According to the embodiment of the application, the effective focal length f of the optical imaging lens and the effective focal length f3 of the third lens can meet-1 < f3/f < -0.5.
According to the embodiment of the application, the combined focal length f12 of the first lens and the second lens and the effective focal length f of the optical imaging lens can satisfy 0.5 < f12/f < 1.
According to an embodiment of the present application, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R3 of the object-side surface of the second lens may satisfy 0.5 < (R3-R1)/(R3+R1) < 1.
According to an embodiment of the present application, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R5 of the object-side surface of the third lens may satisfy-1.1 < R5/R3 < -0.1.
According to the embodiment of the application, the center thickness CT1 of the first lens on the optical axis and the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens can satisfy 0.1 < CT1/TTL <0.6.
According to the embodiment of the application, the edge thickness ET1 of the first lens and the edge thickness ET2 of the second lens can satisfy 0.3 < ET1/ET2 < 0.8.
According to the embodiment of the application, the optical imaging lens further comprises a diaphragm, and the on-axis distance SD from the diaphragm to the image side surface of the third lens and the back focus BFL of the optical imaging lens can meet the condition that 0.1 < BFL/SD < 0.6.
The application provides an optical imaging lens comprising a plurality of (e.g. three) lenses, which has the beneficial effects of small volume, easy assembly, higher space utilization rate and good imaging quality by reasonably distributing the focal power, the surface type, the center thickness of each lens, the axial spacing between each lens and the like.
Drawings
The above and other advantages of embodiments of the present application will become apparent by reference to the following detailed description of the embodiments of the application with the accompanying drawings, which are intended to illustrate exemplary embodiments of the application and not to limit it. In the drawings:
fig. 1 shows a schematic configuration diagram of an optical imaging lens according to a first embodiment of the present application;
fig. 2A to 2D sequentially show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve according to the first embodiment of the present application;
fig. 3 is a schematic structural view showing an optical imaging lens according to a second embodiment of the present application;
fig. 4A to 4D sequentially show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve according to the second embodiment of the present application;
fig. 5 shows a schematic structural diagram of an optical imaging lens according to a third embodiment of the present application;
fig. 6A to 6D sequentially show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve according to the third embodiment of the present application;
fig. 7 shows a schematic structural diagram of an optical imaging lens according to a fourth embodiment of the present application;
fig. 8A to 8D sequentially show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve according to the fourth embodiment of the present application;
Fig. 9 is a schematic structural view showing an optical imaging lens according to a fifth embodiment of the present application;
Fig. 10A to 10D sequentially show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve according to the fifth embodiment of the present application;
Fig. 11 is a schematic structural diagram showing an optical imaging lens according to a sixth embodiment of the present application;
fig. 12A to 12D sequentially show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve according to the sixth embodiment of the present application;
Fig. 13 is a schematic structural view showing an optical imaging lens according to a seventh embodiment of the present application; and
Fig. 14A to 14D sequentially show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve according to the seventh embodiment of the present application.
Detailed Description
For a better understanding of the application, various aspects of the application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the application and is not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens of an optical imaging lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. In each lens, the surface closest to the subject is referred to as the subject side of the lens; in each lens, the surface closest to the imaging plane is referred to as the image side of the lens.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The features, principles, and other aspects of the present application are described in detail below.
The optical imaging lens according to an exemplary embodiment of the present application may include: a first lens, a second lens and a third lens. The three lenses are sequentially arranged from the object side to the image side along the optical axis, and each adjacent lens can have an air space therebetween.
In an exemplary embodiment, the first lens has positive optical power, and the object side of the first lens is convex; the second lens has positive focal power, and the object side surface of the second lens is a convex surface; the third lens has optical power, and the object side surface of the third lens is a concave surface. By setting the focal power of each lens and the surface shape of each lens mirror surface, the optical imaging lens can effectively balance low-order aberration. The focal power of the first lens is set to be positive, so that the optical imaging lens can better correct off-axis aberration, and the imaging quality of the optical imaging lens is improved.
In an exemplary embodiment, the optical imaging lens further includes a diaphragm. Illustratively, the aperture is disposed between the first lens and the second lens.
In an exemplary embodiment, the optical imaging lens provided by the present application may satisfy the conditional expression 0.1 < BFL/SD < 0.6, where SD is an on-axis distance from the stop to the image side of the third lens, and BFL is a back focal length of the optical imaging lens (i.e., a distance from the image side of the third lens to the imaging plane). In an exemplary embodiment, SD and BFL may satisfy 0.25 < BFL/SD < 0.50. By controlling the distance from the diaphragm to the image side surface of the third lens on the axis and the back focus of the optical imaging lens, the size of each lens can be balanced, the assembly stability of the optical imaging lens is improved, and in addition, the aberration of the optical imaging lens can be reduced.
In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that 0.4 < tan (Semi-FOV) < 0.9, wherein Semi-FOV is half of the maximum field angle of the optical imaging lens. In an exemplary embodiment, the Semi-FOV may satisfy the conditional expression 0.45 < tan (Semi-FOV) < 0.60.
In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the conditional expression 0.7 < CT2/CT3 < 1.2, wherein CT2 is the center thickness of the second lens on the optical axis, and CT3 is the center thickness of the third lens on the optical axis. In an exemplary embodiment, CT2 and CT3 may satisfy 0.8 < CT2/CT3 < 1.0. The ratio of the center thicknesses of the second lens and the third lens is controlled, so that the sizes of the lenses are balanced, meanwhile, the difficulty in assembling the lenses is reduced, in addition, the size of an optical system is reduced, the size of an optical imaging lens is further reduced, and higher space utilization rate is realized.
In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that ET3/DT31 is less than 1, wherein ET3 is the edge thickness of the third lens, and DT31 is the maximum effective radius of the object side surface of the third lens. In an exemplary embodiment, ET3 and DT31 may satisfy 0.7 < ET3/DT31 < 1. The maximum effective radius of the object side surface of the third lens and the edge thickness of the third lens are controlled, so that the trend of incident light at the third lens is controlled, and the optical imaging lens has good distortion eliminating capability.
In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that SAG22/SAG11 is less than 0.6, wherein SAG11 is an on-axis distance between an intersection point of an object side surface of the first lens and an optical axis and an effective radius vertex of the object side surface of the first lens, and SAG22 is an on-axis distance between an intersection point of an image side surface of the second lens and the optical axis and an effective radius vertex of the image side surface of the second lens. In an exemplary embodiment, SAG11 and SAG22 may satisfy 0.2 < SAG22/SAG11 < 0.5. The sagittal height of the object side surface of the first lens and the sagittal height of the image side surface of the second lens are reasonably controlled, so that the sizes of the lenses are relatively balanced, the difficulty in lens combination and assembly is further reduced, and in addition, the resolution of the system is improved, so that the optical imaging lens has good imaging quality.
In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that 0.5 < SAG32/SAG31 < 1.2, wherein SAG31 is an on-axis distance between an intersection point of an object side surface of the third lens and an optical axis to an effective radius vertex of the object side surface of the third lens, and SAG32 is an on-axis distance between an intersection point of an image side surface of the third lens and the optical axis to an effective radius vertex of the image side surface of the third lens. In an exemplary embodiment, SAG31 and SAG32 may satisfy 0.55 < SAG32/SAG31 < 1.15. The sagittal height of the object side surface and the sagittal height of the image side surface of the third lens are reasonably controlled, so that the third lens has larger refractive power on light rays of an off-axis visual field, the whole length of the optical imaging lens is shortened, the resolution of the optical imaging lens is improved, and the imaging quality is improved.
In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that (f 2-f 1)/(f2+f1) <1, wherein f1 is the effective focal length of the first lens and f2 is the effective focal length of the second lens. In an exemplary embodiment, f1 and f2 may satisfy 0.7 < (f 2-f 1)/(f2+f1) <1. By controlling the effective focal length of the first lens and the effective focal length of the second lens, the converging capability of the object side end of the optical imaging lens to the light beam can be improved, the focusing position of the light beam can be adjusted, and the optical total length of the optical imaging lens can be further shortened, so that the size of the optical imaging lens is smaller.
In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that f3/f is < -0.5, wherein f is the effective focal length of the optical imaging lens, and f3 is the effective focal length of the third lens. In an exemplary embodiment, f and f3 may satisfy-1 < f3/f < -0.7. By controlling the focal power of the third lens, the tolerance sensitivity of the optical imaging lens can be reduced, and the imaging quality of the optical imaging lens can be improved.
In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that f12/f is less than 1, wherein f12 is a combined focal length of the first lens and the second lens, f is an effective focal length of the optical imaging lens, and in an exemplary embodiment, f12 and f can satisfy 0.6 < f12/f < 0.9. The combined focal length of the first lens and the second lens is controlled, so that the effective focal length of the optical imaging lens can be increased, and the optical imaging lens can have the capability of balancing field curvature.
In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that (R3-R1)/(R3+R1) < 1, wherein R1 is the curvature radius of the object side surface of the first lens, and R3 is the curvature radius of the object side surface of the second lens. In an exemplary embodiment, R1 and R3 may satisfy 0.6 < (R3-R1)/(R3+R1) < 0.9. The ratio of the curvature radius of the object side surface of the first lens to the curvature radius of the object side surface of the second lens is reasonably controlled, so that the spherical aberration and astigmatism of the optical imaging lens can be reduced, and the imaging quality of the optical imaging lens is improved.
In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that R5/R3 < -0.1 is less than 1.1, wherein the curvature radius R5 of the object side surface of the second lens of R3 is the curvature radius of the object side surface of the third lens, and in an exemplary embodiment, R3 and R5 can satisfy R5/R3 < -0.1 which is less than 0.8. The ratio of the curvature radius of the object side surface of the second lens to the curvature radius of the object side surface of the third lens is reasonably controlled, so that the optical imaging lens has better imaging chromatic aberration correcting capability, and various aberrations can be balanced.
In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the conditional expression 0.1 < CT1/TTL < 0.6, wherein CT1 is the center thickness of the first lens on the optical axis, and TTL is the axial distance from the object side surface of the first lens to the imaging surface of the optical imaging lens. In an exemplary embodiment, CT1 and TTL can satisfy 0.15 < CT1/TTL < 0.3. The thickness of the center of the first lens on the optical axis is reasonably controlled, so that the uniform distribution of the lens size of the first lens is facilitated, the assembly stability of the optical imaging lens is ensured, and in addition, the aberration of the optical imaging lens is reduced.
In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the conditional expression 0.3 < ET1/ET2 < 0.8, wherein ET1 is the edge thickness of the first lens and ET2 is the edge thickness of the second lens. In an exemplary embodiment, ET1 and ET2 may satisfy 0.4 < ET1/ET2 < 0.8. By controlling the edge thickness of the first lens and the edge thickness of the second lens, the lens sizes of the lenses are uniformly distributed, the difficulty in assembling the lenses is further reduced, and a higher space utilization rate is realized.
Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located at the imaging surface.
The imaging lens group according to the above embodiment of the present application may employ a plurality of lenses, for example, three lenses as described above. The focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like of each lens are reasonably distributed, so that the volume of the lens can be effectively reduced, the sensitivity of the lens is reduced, the machinability of the lens is improved, the camera lens group is more beneficial to production and machining and applicable to portable electronic products, and in addition, the focal power of the lens can be controlled to effectively correct the low-order aberration and the off-axis aberration of the optical imaging lens, so that the imaging quality is improved.
In the embodiment of the present application, aspherical mirror surfaces are often used as the mirror surfaces of the respective lenses. At least one of the object-side surface of the first lens to the image-side surface of the third lens is an aspherical mirror surface. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality.
Optionally, at least one of an object side surface and an image side surface of each of the first lens, the second lens, and the third lens may be aspherical. Alternatively, the object side surface and the image side surface of each of the first lens, the second lens, and the third lens may be aspherical surfaces. Optionally, the object side surface and the image side surface of the first lens are aspheric. Optionally, the object side surface and the image side surface of the first lens are aspheric. Optionally, the object side surface of the first lens element and the image side surface of the third lens element are aspheric. Optionally, the object side surface of the first lens element, the object side surface of the fourth lens element, the object side surface of the fifth lens element and the object side surface of the sixth lens element are aspheric.
Specific examples of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.
Example 1
Referring to fig. 1 to 2D, the optical imaging lens of the present embodiment sequentially includes, along an optical axis from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, and a filter E4. A stop STO may be provided between the first lens E1 and the second lens E2. Any two adjacent lenses may have an air space between them.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave and an image-side surface S6 thereof is convex. The filter E4 has an object side surface S7 and an image side surface S8. The optical imaging lens of the present embodiment has an imaging surface S9. Light from the object sequentially passes through the respective surfaces (S1 to S8) and is imaged on the imaging surface S9.
Table 1 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of radius of curvature, thickness, and focal length are all millimeters (mm), specifically as follows:
TABLE 1
Wherein TTL is an on-axis distance between the object side surface S1 of the first lens E1 and the imaging surface S9 of the optical imaging lens, semi-FOV is a maximum half field angle of the optical imaging lens, f is an effective focal length of the optical imaging lens, f/EPD is a ratio of the effective focal length of the optical imaging lens to an entrance pupil diameter, and ImgH is half of a diagonal length of an effective pixel region on the imaging surface S9.
The object side surface and the image side surface of any one of the first lens element E1 to the third lens element E3 of the optical imaging lens are aspheric, and the surface shape x of each aspheric lens can be defined by, but not limited to, the following aspheric formula:
Wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the aspherical i-th order. The following table 2 gives the higher order coefficients a 4、A6、A8、A10、A12、A14 and a 16 that can be used for the respective aspherical surfaces S1 to S6 in accordance with embodiment one.
TABLE 2
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S2 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S3 | -3.34E-01 | 1.00E+00 | 3.08E-01 | -6.40E+00 | 1.81E+01 | -2.46E+01 | 1.35E+01 |
| S4 | 1.35E-01 | -1.56E-01 | 2.70E+00 | -1.35E+01 | 4.06E+01 | -6.44E+01 | 4.38E+01 |
| S5 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S6 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents deviation of converging focal points of light rays of different wavelengths after passing through the optical system. Fig. 2B shows an astigmatism curve of the optical imaging lens of the present embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows a distortion curve of the optical imaging lens of the present embodiment, 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 the present embodiment, which represents deviations of different image heights on an imaging plane after light passes through an optical system. As can be seen from fig. 2A to 2D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.
Example two
An optical imaging lens according to a second embodiment of the present application will be described below with reference to fig. 3 to 4D, and in the present exemplary embodiment and the following embodiments, descriptions of portions similar to those of the first embodiment will be omitted for brevity.
The optical imaging lens of the present embodiment sequentially includes, along an optical axis from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, and a filter E4. A stop STO may be provided between the first lens E1 and the second lens E2. Any two adjacent lenses may have an air space between them.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave and an image-side surface S6 thereof is convex. The filter E4 has an object side surface S7 and an image side surface S8. The optical imaging lens of the present embodiment has an imaging surface S9. Light from the object sequentially passes through the respective surfaces (S1 to S8) and is imaged on the imaging surface S9.
Table 3 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm), and table 4 shows the higher order coefficients of the respective aspherical surfaces usable for the optical imaging lens of the present embodiment, in which the respective aspherical surface forms can be defined by the foregoing formula (1), specifically as follows:
TABLE 3 Table 3
TABLE 4 Table 4
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S2 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S3 | -2.83E-01 | 6.09E-01 | -3.14E+00 | 2.13E+01 | -6.74E+01 | 1.04E+02 | -6.39E+01 |
| S4 | 1.24E-01 | -5.15E-01 | 5.44E+00 | -2.48E+01 | 6.61E+01 | -9.33E+01 | 5.59E+01 |
| S5 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S6 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents deviation of converging focal points of light rays of different wavelengths after passing through the optical system. Fig. 4B shows an astigmatism curve of the optical imaging lens of the present embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a magnification chromatic aberration curve of the optical imaging lens of the present embodiment, which represents deviations of different image heights on an imaging plane after light passes through an optical system. As can be seen from fig. 4A to 4D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.
Example III
An optical imaging lens according to a third embodiment of the present application is described below with reference to fig. 5 to 6D. The optical imaging lens of the present embodiment sequentially includes, along an optical axis from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, and a filter E4. A stop STO may be provided between the first lens E1 and the second lens E2. Any two adjacent lenses may have an air space between them.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is concave. The filter E4 has an object side surface S7 and an image side surface S8. The optical imaging lens of the present embodiment has an imaging surface S9. Light from the object sequentially passes through the respective surfaces (S1 to S8) and is imaged on the imaging surface S9.
Table 5 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm), and table 6 shows the higher order coefficients of the respective aspherical surfaces usable for the optical imaging lens of the present embodiment, in which the respective aspherical surface forms can be defined by the foregoing formula (1), specifically as follows:
TABLE 5
TABLE 6
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S2 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S3 | -3.79E-01 | -1.42E+00 | 1.19E+01 | -3.54E+01 | 6.36E+01 | -6.70E+01 | 3.12E+01 |
| S4 | 7.85E-02 | 8.36E-02 | 3.75E-01 | -1.10E+00 | 1.95E+00 | -1.48E+00 | 6.82E-01 |
| S5 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S6 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents deviation of converging focal points of light rays of different wavelengths after passing through the optical system. Fig. 6B shows an astigmatism curve of the optical imaging lens of the present embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a magnification chromatic aberration curve of the optical imaging lens of the present embodiment, which represents deviations of different image heights on an imaging plane after light passes through an optical system. As can be seen from fig. 6A to 6D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.
Example IV
An optical imaging lens according to a fourth embodiment of the present application is described below with reference to fig. 7 to 8D. The optical imaging lens of the present embodiment sequentially includes, along an optical axis from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, and a filter E4. A stop STO may be provided between the first lens E1 and the second lens E2. Any two adjacent lenses may have an air space between them.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is concave. The filter E4 has an object side surface S7 and an image side surface S8. The optical imaging lens of the present embodiment has an imaging surface S9. Light from the object sequentially passes through the respective surfaces (S1 to S8) and is imaged on the imaging surface S9.
Table 7 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm), and table 8 shows the higher order coefficients of the respective aspherical surfaces usable for the optical imaging lens of the present embodiment, in which the respective aspherical surface forms can be defined by the foregoing formula (1), specifically as follows:
TABLE 7
TABLE 8
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S2 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S3 | -4.25E-01 | -1.33E+00 | 9.56E+00 | -1.67E+01 | 5.92E+00 | 1.42E+01 | -1.26E+01 |
| S4 | 9.76E-02 | -6.31E-02 | 2.04E+00 | -7.86E+00 | 1.62E+01 | -1.68E+01 | 7.39E+00 |
| S5 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S6 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of the converging focus after light rays of different wavelengths pass through the optical system. Fig. 8B shows an astigmatism curve of the optical imaging lens of the present embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8C shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a magnification chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of different image heights on the imaging plane after light passes through the optical system. As can be seen from fig. 8A to 8D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.
Example five
An optical imaging lens according to a fifth embodiment of the present application is described below with reference to fig. 9 to 10D. The optical imaging lens of the present embodiment sequentially includes, along an optical axis from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, and a filter E4. A stop STO may be provided between the first lens E1 and the second lens E2. Any two adjacent lenses may have an air space between them.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is concave. The filter E4 has an object side surface S7 and an image side surface S8. The optical imaging lens of the present embodiment has an imaging surface S9. Light from the object sequentially passes through the respective surfaces (S1 to S8) and is imaged on the imaging surface S9.
Table 9 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm), and table 10 shows the higher order coefficients of the respective aspherical surfaces usable for the optical imaging lens of the present embodiment, in which the respective aspherical surface forms can be defined by the foregoing formula (1), specifically as follows:
TABLE 9
Table 10
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S2 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S3 | -7.38E-01 | 9.73E-01 | 7.19E+00 | -3.34E+01 | 6.68E+01 | -6.65E+01 | 2.68E+01 |
| S4 | 6.88E-02 | 4.58E-02 | 1.02E+00 | -3.67E+00 | 7.19E+00 | -7.20E+00 | 3.46E+00 |
| S5 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S6 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of the converging focus after light rays of different wavelengths pass through the optical system. Fig. 10B shows an astigmatism curve of the optical imaging lens of the present embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 10C shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a magnification chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of different image heights on the imaging plane after light passes through the optical system. As can be seen from fig. 10A to 10D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.
Example six
An optical imaging lens according to a sixth embodiment of the present application is described below with reference to fig. 11 to 12D. The optical imaging lens of the present embodiment sequentially includes, along an optical axis from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, and a filter E4. A stop STO may be provided between the first lens E1 and the second lens E2. Any two adjacent lenses may have an air space between them.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is concave. The filter E4 has an object side surface S7 and an image side surface S8. The optical imaging lens of the present embodiment has an imaging surface S9. Light from the object sequentially passes through the respective surfaces (S1 to S8) and is imaged on the imaging surface S9.
Table 11 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm), and table 12 shows the higher order coefficients of the respective aspherical surfaces usable for the optical imaging lens of the present embodiment, in which the respective aspherical surface forms can be defined by the foregoing formula (1), specifically as follows:
TABLE 11
Table 12
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S2 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S3 | -2.97E-01 | -3.61E+00 | 2.64E+01 | -7.97E+01 | 1.33E+02 | -1.20E+02 | 4.57E+01 |
| S4 | 1.09E-01 | 6.47E-02 | 1.09E+00 | -5.56E+00 | 1.43E+01 | -1.80E+01 | 9.42E+00 |
| S5 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S6 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of the converging focus after light rays of different wavelengths pass through the optical system. Fig. 12B shows an astigmatism curve of the optical imaging lens of the present embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 12C shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a magnification chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of different image heights on the imaging plane after light passes through the optical system. As can be seen from fig. 12A to 12D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.
Example seven
An optical imaging lens according to a seventh embodiment of the present application is described below with reference to fig. 13 to 14D. The optical imaging lens of the present embodiment sequentially includes, along an optical axis from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, and a filter E4. A stop STO may be provided between the first lens E1 and the second lens E2. Any two adjacent lenses may have an air space between them.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave and an image-side surface S6 thereof is convex. The filter E4 has an object side surface S7 and an image side surface S8. The optical imaging lens of the present embodiment has an imaging surface S9. Light from the object sequentially passes through the respective surfaces (S1 to S8) and is imaged on the imaging surface S9.
Table 13 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm), and table 14 shows the higher order coefficients of the respective aspherical surfaces usable for the optical imaging lens of the present embodiment, in which the respective aspherical surface forms can be defined by the foregoing formula (1), specifically as follows:
TABLE 13
TABLE 14
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S2 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S3 | -2.65E-01 | -1.62E+00 | 1.31E+01 | -3.73E+01 | 5.74E+01 | -4.70E+01 | 1.59E+01 |
| S4 | 1.80E-01 | -3.51E-01 | 3.66E+00 | -1.40E+01 | 3.02E+01 | -3.33E+01 | 1.55E+01 |
| S5 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S6 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of the converging focus after light rays of different wavelengths pass through the optical system. Fig. 14B shows an astigmatism curve of the optical imaging lens of the present embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 14C shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. Fig. 14D shows a magnification chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of different image heights on the imaging plane after light passes through the optical system. As can be seen from fig. 14A to 14D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.
In summary, the first to seventh embodiments correspond to satisfy the relationship shown in table 15 below.
TABLE 15
| Conditional\embodiment | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| tan(Semi-FOV) | 0.48 | 0.47 | 0.50 | 0.49 | 0.50 | 0.49 | 0.47 |
| CT2/CT3 | 0.86 | 0.97 | 0.99 | 0.75 | 0.82 | 0.89 | 1.06 |
| ET3/DT31 | 0.95 | 0.98 | 0.81 | 0.84 | 0.89 | 0.77 | 0.80 |
| SAG22/SAG11 | 0.37 | 0.26 | 0.24 | 0.24 | 0.46 | 0.22 | 0.31 |
| SAG32/SAG31 | 1.13 | 1.13 | 0.87 | 0.67 | 0.60 | 0.90 | 0.99 |
| (f2-f1)/(f1+f2) | 0.94 | 0.94 | 0.95 | 0.72 | 0.96 | 0.95 | 0.95 |
| f3/f | -0.75 | -0.92 | -0.99 | -0.99 | -0.90 | -0.96 | -0.90 |
| f12/f | 0.69 | 0.71 | 0.80 | 0.81 | 0.80 | 0.80 | 0.74 |
| (R3-R1)/(R3+R1) | 0.67 | 0.70 | 0.82 | 0.82 | 0.79 | 0.83 | 0.83 |
| R5/R3 | -0.20 | -0.25 | -0.39 | -0.61 | -0.57 | -0.31 | -0.13 |
| CT1/TTL | 0.21 | 0.19 | 0.18 | 0.17 | 0.18 | 0.20 | 0.16 |
| ET1/ET2 | 0.77 | 0.60 | 0.51 | 0.68 | 0.70 | 0.61 | 0.46 |
| BFL/SD | 0.36 | 0.48 | 0.34 | 0.35 | 0.34 | 0.35 | 0.33 |
However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the technical solution claimed in the present application. For example, although three lenses are described as an example in the embodiment, the optical imaging lens is not limited to include three lenses. The optical imaging lens may also include other numbers of lenses, if desired.
In an exemplary embodiment, the present application also provides an image pickup apparatus provided with an electronic photosensitive element for imaging, which may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The image pickup apparatus may be a stand-alone image pickup device such as a digital camera, or may be an image pickup module integrated on a mobile electronic device such as a cellular phone. The image pickup apparatus is equipped with the optical imaging lens described above.
Exemplary embodiments of the present application are described above with reference to the accompanying drawings. It will be appreciated by those skilled in the art that the above-described embodiments are examples for illustrative purposes only and are not intended to limit the scope of the present application. Any modifications, equivalents, and so forth that come within the teachings of the application and the scope of the claims are intended to be included within the scope of the application as claimed.
Claims (10)
1. The optical imaging lens is characterized by sequentially comprising, from an object side to an image side along an optical axis:
A first lens with positive focal power, the object side surface of which is a convex surface;
A diaphragm;
a second lens having positive optical power, the object side surface of which is a convex surface;
A third lens with negative focal power, the object side surface of which is a concave surface;
Half of the Semi-FOV of the maximum field angle of the optical imaging lens satisfies 0.4 < tan (Semi-FOV) < 0.9;
the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy 0.5 < (f 2-f 1)/(f2+f1) < 1;
an on-axis distance SAG11 between an intersection point of the object side surface of the first lens and the optical axis and an effective radius vertex of the object side surface of the first lens and an on-axis distance SAG22 between an intersection point of the image side surface of the second lens and the optical axis and an effective radius vertex of the image side surface of the second lens satisfy 0.1 < SAG22/SAG11 < 0.6;
the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis meet 0.7 < CT2/CT3 < 1.2;
The number of lenses having optical power in the optical imaging lens is three.
2. The optical imaging lens as claimed in claim 1, wherein an edge thickness ET3 of the third lens and a maximum effective radius DT31 of an object side surface of the third lens satisfy 0.5 < ET3/DT31 <1.
3. The optical imaging lens according to claim 1, wherein an on-axis distance SAG31 between an intersection of the object side surface of the third lens and the optical axis to an effective radius vertex of the object side surface of the third lens and an on-axis distance SAG32 between an intersection of the image side surface of the third lens and the optical axis to an effective radius vertex of the image side surface of the third lens satisfy 0.5 < SAG32/SAG31 < 1.2.
4. The optical imaging lens of claim 1, wherein an effective focal length f of the optical imaging lens and an effective focal length f3 of the third lens satisfy-1 < f3/f < -0.5.
5. The optical imaging lens of claim 1, wherein a combined focal length f12 of the first lens and the second lens and an effective focal length f of the optical imaging lens satisfy 0.5< f12/f <1.
6. The optical imaging lens as claimed in claim 1, wherein a radius of curvature R1 of an object side surface of the first lens and a radius of curvature R3 of an object side surface of the second lens satisfy 0.5 < (R3-R1)/(r3+r1) < 1.
7. The optical imaging lens as claimed in claim 1, wherein a radius of curvature R3 of an object side of the second lens and a radius of curvature R5 of an object side of the third lens satisfy-1.1 < R5/R3 < -0.1.
8. The optical imaging lens as claimed in claim 1, wherein a center thickness CT1 of the first lens on the optical axis and an on-axis distance TTL from an object side surface of the first lens to an imaging surface of the optical imaging lens satisfy 0.1 < CT1/TTL < 0.6.
9. The optical imaging lens of claim 1, wherein an edge thickness ET1 of the first lens and an edge thickness ET2 of the second lens satisfy 0.3 < ET1/ET2 < 0.8.
10. The optical imaging lens of any of claims 1 to 9, wherein an on-axis distance SD of the diaphragm to the image side of the third lens and a back focal BFL of the optical imaging lens satisfy 0.1 < BFL/SD < 0.6.
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