CN113721347B - Optical imaging lens, camera module and electronic equipment - Google Patents
Optical imaging lens, camera module and electronic equipment Download PDFInfo
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- CN113721347B CN113721347B CN202110997239.0A CN202110997239A CN113721347B CN 113721347 B CN113721347 B CN 113721347B CN 202110997239 A CN202110997239 A CN 202110997239A CN 113721347 B CN113721347 B CN 113721347B
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- 238000012634 optical imaging Methods 0.000 title claims abstract description 81
- 230000003287 optical effect Effects 0.000 claims abstract description 41
- 238000003384 imaging method Methods 0.000 claims description 17
- 238000000926 separation method Methods 0.000 claims description 3
- 230000004075 alteration Effects 0.000 description 14
- 239000000463 material Substances 0.000 description 4
- 206010010071 Coma Diseases 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
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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
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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
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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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
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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Abstract
The application discloses optical imaging lens, module and electronic equipment of making a video recording belongs to optical element technical field, and wherein optical imaging lens includes: the first lens is provided with negative focal power, the object side surface is a convex surface, and the image side surface is a concave surface; a second lens having optical power; the third lens is provided with positive focal power, the object side surface is a convex surface, and the image side surface is a convex surface; the fourth lens is provided with negative focal power, the object side surface is a convex surface, and the image side surface is a concave surface; a fifth lens having negative optical power; a sixth lens element with positive refractive power, having a convex object-side surface and a convex image-side surface; and a seventh lens element having positive refractive power, with an object-side surface being convex and an image-side surface being convex; the maximum half field angle of the optical imaging lens is larger than or equal to 64.5 degrees; the Abbe number of the second lens is V2, the curvature radius value of the image side surface of the second lens is R4, and V2/R4 is more than 2.5 and less than 3.5.
Description
Technical Field
The application belongs to the technical field of optical elements, and particularly relates to an optical imaging lens, a camera module and electronic equipment.
Background
With the user's demand for large field of view photographing, more and more electronic devices are configured with an optical imaging lens having an ultra-wide angle. However, the distortion of the optical imaging lens with the ultra-wide angle is larger, and the distortion is larger as the angle is larger, so that the photographed image is obviously deformed, and the proportion of the image is not consistent. At present, distortion correction is generally carried out on a shot image by means of software, on one hand, the capability of the software for correcting the distortion is limited, and on the other hand, the software correction needs to consume additional power consumption, so that the electronic equipment generates serious heat during shooting.
Disclosure of Invention
The application aims at providing an optical imaging lens, a camera module and electronic equipment, and at least solves the problem that the distortion of the ultra-wide angle optical imaging lens is large in the prior art.
In order to solve the technical problems, the application is realized as follows:
in a first aspect, an embodiment of the present application provides an optical imaging lens, including, in order from an object side to an image side along an optical axis:
the first lens is provided with negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;
a second lens having optical power;
the third lens is provided with positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface;
a fourth lens element with negative refractive power having a convex object-side surface and a concave image-side surface;
a fifth lens having negative optical power;
a sixth lens element with positive refractive power having a convex object-side surface and a convex image-side surface; and
a seventh lens element with positive refractive power having a convex object-side surface and a convex image-side surface;
the maximum half field angle of the optical imaging lens is larger than or equal to 64.5 degrees; and
the Abbe number of the second lens is V2, and the curvature radius value of the image side surface of the second lens is R4, wherein V2/R4 is more than 2.5 and less than 3.5.
In a second aspect, an embodiment of the present application proposes an imaging module, including an optical imaging lens in the first aspect.
In a third aspect, an embodiment of the present application provides an electronic device, including an image capturing module in the second aspect.
In the embodiment of the application, the optical imaging lens has the characteristics of super wide angle and low distortion by arranging seven lenses and reasonably arranging the focal power type, the surface type, the curvature radius, the Abbe number and other characteristics of each lens.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:
fig. 1 is a schematic structural diagram of an optical imaging lens according to an embodiment of the present application;
FIG. 2 is an on-axis chromatic aberration curve of an optical imaging lens according to an embodiment of the present disclosure;
FIG. 3 is an astigmatism curve of an optical imaging lens according to an embodiment of the present disclosure;
FIG. 4 is a distortion curve of an optical imaging lens according to an embodiment of the present disclosure;
FIG. 5 is a chromatic aberration of magnification curve of an optical imaging lens according to an embodiment of the present disclosure;
FIG. 6 is an on-axis chromatic aberration curve of an optical imaging lens according to another embodiment of the present application;
FIG. 7 is an astigmatism curve of an optical imaging lens according to another embodiment of the present application;
FIG. 8 is a distortion curve of an optical imaging lens according to another embodiment of the present application;
fig. 9 is a magnification chromatic aberration curve of an optical imaging lens according to another embodiment of the present application.
Reference numerals:
l1, a first lens; l2, a second lens; l3, a third lens; l4, a fourth lens; l5, a fifth lens; l6, sixth lens; l7, seventh lens; l8, an optical filter.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description and claims of the present application, the expressions first, second, third, etc. are used only to distinguish one feature from another feature and do not represent any limitation of the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.
Herein, if the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in a region close to the optical axis (short for 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 referred to as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens.
An image capturing module according to an embodiment of the present application is described below with reference to fig. 1.
According to the optical imaging lens of the embodiment of the present application, seven lenses having optical power, that is, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 may be included. The seven lenses are sequentially arranged from the object side to the image side along the optical axis, and each adjacent lens can have an air space therebetween. The maximum half field angle (Semi-FOV) of the optical imaging lens of the embodiments of the present application is greater than or equal to 64.5 °. The first lens L1 may be configured to provide a larger angle of view, the first and second lenses L1 and L2 may be configured to eliminate spherical and coma, and the third to seventh lenses L3 to L7 may be configured to eliminate distortion.
In the embodiment of the application, by reasonably setting the focal power type and the surface type of each lens, the curvature radius, the Abbe number and other characteristics, the imaging quality of an optical system can be met, and the optical imaging lens can have the characteristics of super wide angle and low distortion. The characteristics of each lens are described below.
The first lens element L1 has a negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens L2 has optical power, the Abbe number of the second lens L2 is V2, and the curvature radius value of the image side surface S4 of the second lens L2 is R4, wherein V2/R4 is more than 2.5 and less than 3.5. The third lens element L3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element L4 has a negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens L5 has negative optical power. The sixth lens element L6 has a positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is convex. The seventh lens element L7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex.
By reasonably setting the focal power of each lens, the surface type of each lens and other characteristics, the optical imaging lens is beneficial to reducing the spherical aberration, the coma aberration and the distortion of the optical imaging lens while having a larger field angle, so that the optical imaging lens has the characteristics of super wide angle and low distortion.
In some embodiments, the radius of curvature of the object-side surface S1 of the first lens element L1 is R1, and the radius of curvature of the image-side surface S2 of the first lens element L1 is R2, with 0.5 < (R1-R2)/(R1+R2) < 2.5. Here, by controlling the ratio of the difference between the curvature radii of the two sides of the object image of the first lens L1 to the sum of the curvature radii of the two sides of the object image of the first lens L1 in the above range, the deflection angle of the light beam of the optical imaging lens passing through the first lens L1 can be reasonably controlled, and the sensitivity of the optical imaging lens can be effectively reduced.
In some embodiments, the radius of curvature of the object-side surface S3 of the second lens element L2 is R3, and the radius of curvature of the image-side surface S4 of the second lens element L2 is R4, -1.5 < R4/R3 < 1.5. Here, by controlling the ratio of the radii of curvature of the two sides of the object image of the second lens L2 in the above range, the sensitivity of the optical imaging lens is reduced, and the external view field coma of the optical imaging lens can be balanced, so as to optimize the light aberration curve of the optical imaging lens.
In some embodiments, the radius of curvature of the object-side surface S5 of the third lens element L3 is R5, and the radius of curvature of the image-side surface S6 of the third lens element L3 is R6, -2 < R5/R6 < -1.5. Here, by controlling the ratio of the radii of curvature of the two sides of the object image of the third lens L3 in the above range, the size of the optical imaging lens can be reduced, so that the optical power of the optical imaging lens is reasonably distributed, and the distortion generated by the distance from the diaphragm can be corrected.
In some embodiments, the effective focal length of the first lens L1 is f1, and the effective focal length of the second lens L2 is f2, -5 < f2/f1 < -4. Here, by controlling the ratio of the effective focal length of the first lens L1 to the effective focal length of the second lens L2 in the above range, the size of the optical imaging lens can be reduced, so that the focal power of the optical imaging lens is reasonably distributed, and the spherical aberration contribution of the first lens L1 and the second lens L2 can be controlled within a reasonable range, thereby obtaining better on-axis field imaging quality.
In some embodiments, the effective focal length of the third lens L3 is f3, and the effective focal length of the fourth lens L4 is f4, -4 < f4/f3 < -3. Here, by controlling the ratio of the effective focal length of the third lens L3 to the effective focal length of the fourth lens L4 in the above range, the aberration of the optical imaging lens can be better balanced, and the resolution of the optical imaging lens can be improved.
In some embodiments, the distance between the object side surface S1 of the first lens element L1 and the imaging surface S17 of the optical imaging lens assembly on the optical axis is TTL, and the effective focal length of the sixth lens element L6 is f6,1 < TTL/f6 < 2.5.
TTL may also be referred to as the optical total length of the optical imaging lens. Here, by controlling the ratio of the optical total length of the optical imaging lens to the effective focal length of the sixth lens L6 in the above-described range, it is advantageous to reduce the thickness of the optical imaging lens and to better adjust the chromatic aberration of the optical imaging lens.
In some embodiments, the center thickness of the first lens L1 on the optical axis is CT1, and the air gap distance between the first lens L1 and the second lens L2 on the optical axis is T12,1.5 < T12/CT1 < 3. Here, by controlling the air-gap distance value of the first lens L1 and the second lens L2 on the optical axis in the above range, downsizing of the optical imaging lens is facilitated.
In some embodiments, the center thickness value of the third lens L3 on the optical axis is CT3, and the air separation distance value between the third lens L3 and the fourth lens L4 on the optical axis is T34, 20 < CT3/T34 < 21. Here, by controlling the air-gap distance value on the optical axis between the third lens L3 and the fourth lens L4 in the above range, it is advantageous to ensure the stability at the time of assembling the third lens L3, thereby advantageously improving the workability of the optical imaging lens while ensuring the optical imaging lens to have a good imaging quality.
In some embodiments, the center thickness value of the fourth lens L4 on the optical axis is CT4, and the air separation distance value between the fourth lens L4 and the fifth lens L5 on the optical axis is T45, wherein 0.5 < CT4/T45 < 1. Here, by controlling the air-gap distance value on the optical axis between the fourth lens L4 and the fifth lens L5 in the above-described range, it is advantageous to ensure the stability at the time of assembling the fourth lens L4, thereby advantageously improving the workability of the optical imaging lens while ensuring the optical imaging lens to have a good imaging quality.
Further, the optical imaging lens may further include a diaphragm, which may be disposed at a proper position as needed, for example, between the second lens L2 and the third lens L3. The optical imaging lens may further include a filter L8 for correcting color deviation, the filter L8 having an object side surface S15 and an image side surface S16. The optical imaging lens may further include a photosensitive element for providing the imaging surface S17, and a protective glass for protecting the photosensitive element located on the imaging surface S17.
The optical imaging lens is specifically described below with reference to specific embodiments.
Example 1
The optical imaging lens sequentially comprises from an object side to an image side along an optical axis: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8. The first lens element L1 has a negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element L2 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 L3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element L4 has a negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element L5 has a negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is convex. The sixth lens element L6 has a positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is convex. The seventh lens element L7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. Light from the object may sequentially pass through S1 to S16 and finally be imaged on the imaging surface S17.
Table 1 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 1, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
TABLE 1
In table 1, OBJ represents the surface on which the subject is located, and STO represents the wavefront.
As can be seen from table 1, the object side surface and the image side surface of any one of the first lens L1 to the seventh lens L7 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); k is the conic coefficient (given in table 1); ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 shows the higher order coefficients A4, A6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, a30 for each aspherical surface.
TABLE 2
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -7.09E-01 | -6.43E-02 | -0.03085459 | -2.76E-02 | -4.90E-02 | -2.11E-02 | -1.79E-02 |
| S2 | 3.15E-01 | 1.02E-01 | -6.09E-02 | -2.26E-02 | -1.40E-02 | -3.57E-03 | -4.95E-03 |
| S3 | 2.39E-01 | 6.14E-02 | 6.14E-03 | -6.54E-03 | -1.40E-02 | -3.57E-03 | -4.95E-03 |
| S4 | -4.28E-02 | 1.21E-02 | -1.61E-04 | -1.21E-03 | 1.19E-04 | 8.49E-04 | -0.001002042 |
| S5 | 3.58E-02 | 3.74E-03 | 1.35E-03 | 6.08E-04 | -9.76E-04 | -2.90E-04 | -1.41E-04 |
| S6 | 1.22E-02 | -2.67E-02 | 3.37E-03 | 1.56E-03 | -3.32E-04 | -1.35E-04 | -9.67E-04 |
| S7 | 4.47E-01 | -1.82E-02 | 9.60E-03 | 2.00E-03 | -2.71E-03 | -6.07E-04 | 1.55E-04 |
| S8 | 2.26E-01 | 3.92E-02 | 8.40E-03 | 8.03E-03 | 4.28E-03 | -3.23E-04 | -1.37E-03 |
| S9 | -1.15E-01 | 5.86E-02 | 6.01E-02 | 1.35E-02 | 1.06E-02 | 1.05E-03 | 5.87E-04 |
| S10 | -6.32E-02 | 1.92E-01 | 4.93E-03 | 2.25E-02 | 9.02E-03 | -4.83E-04 | 3.03E-03 |
| S11 | 1.88E-01 | -1.29E-01 | -1.58E-02 | 2.45E-02 | -2.48E-02 | -1.19E-02 | -1.47E-04 |
| S12 | -1.39E-01 | -4.96E-01 | 1.05E-02 | -3.64E-03 | 7.23E-02 | -1.20E-03 | -6.92E-03 |
| S13 | 5.30E-01 | 1.87E-01 | 2.68E-01 | 3.04E-01 | 1.37E-01 | -6.99E-02 | -2.89E-02 |
| S14 | 2.40E+00 | 6.11E-01 | 1.82E-01 | 2.40E-01 | -1.21E-01 | 1.45E-01 | -2.86E-02 |
| Face number | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | -1.44E-02 | -7.73E-03 | -0.005508826 | -8.45E-04 | -2.99E-03 | 7.40E-04 | -1.02E-03 |
| S2 | -9.41E-04 | 2.17E-03 | 6.72E-04 | 8.02E-04 | -1.76E-03 | 1.26E-03 | -2.19E-04 |
| S3 | -9.41E-04 | 2.17E-03 | 6.72E-04 | 8.02E-04 | -1.76E-03 | 1.26E-03 | -2.19E-04 |
| S4 | 5.23E-04 | 5.77E-05 | -4.31E-04 | 4.78E-04 | -3.47E-04 | 1.54E-04 | -5.31357E-05 |
| S5 | 3.77E-04 | 4.87E-04 | -4.79E-04 | -4.87E-04 | 8.39E-04 | -3.98E-04 | 6.19E-05 |
| S6 | -1.08E-03 | -1.25E-04 | 3.70E-04 | -2.85E-04 | 1.38E-03 | -1.23E-03 | 1.16E-04 |
| S7 | 7.91E-04 | 3.32E-04 | -3.93E-04 | -6.11E-04 | 6.96E-04 | -2.94E-04 | 5.29E-05 |
| S8 | -2.88E-04 | 1.22E-03 | 5.29E-04 | -4.48E-04 | -2.03E-04 | 1.01E-04 | 1.03E-04 |
| S9 | -2.78E-04 | 1.63E-03 | 4.45E-04 | -8.24E-05 | -1.17E-03 | 8.57E-04 | -1.37E-04 |
| S10 | 1.73E-03 | -2.26E-04 | -1.37E-03 | 1.06E-04 | -1.24E-03 | 5.58E-04 | -2.37E-04 |
| S11 | -2.97E-03 | -6.38E-03 | 2.33E-03 | -2.10E-03 | -4.66E-03 | 1.90E-03 | -1.93E-03 |
| S12 | 6.16E-03 | 6.91E-03 | -1.72E-03 | -1.12E-03 | 2.04E-03 | -4.65E-03 | 1.40E-03 |
| S13 | 3.64E-02 | 7.67E-02 | 1.42E-02 | -2.12E-03 | 3.16E-02 | -1.55E-02 | 1.60E-02 |
| S14 | 5.92E-02 | 1.07E-01 | -7.04E-02 | -4.48E-02 | 1.70E-01 | -1.11E-01 | 3.97E-02 |
Fig. 2 shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 3 shows astigmatic curves of the optical imaging lens of embodiment 1, which represent meridional image plane curvature and sagittal image plane curvature. Fig. 4 shows distortion curves of the optical imaging lens of embodiment 1, which represent distortion magnitude values corresponding to different angles of view. Fig. 5 shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of different image heights on the imaging surface S17 after light passes through the lens. As can be seen from fig. 2 to fig. 5, the optical imaging lens provided in embodiment 1 can achieve good imaging quality.
Example 2
The optical imaging lens sequentially comprises from an object side to an image side along an optical axis: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8. The first lens element L1 has a negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element L2 has a negative refractive power, wherein an object-side surface S3 thereof is concave, and an image-side surface S4 thereof is concave. The third lens element L3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element L4 has a negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element L5 has a negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is concave.
The sixth lens element L6 has a positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is convex.
The seventh lens element L7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. Light from the object may sequentially pass through S1 to S16 and finally be imaged on the imaging surface S17.
Table 3 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 2, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
TABLE 3 Table 3
In table 3, OBJ represents the surface on which the subject is located, and STO represents the wavefront.
As can be seen from table 3, the object side surface and the image side surface of any one of the first lens L1 to the seventh lens L7 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 3); k is the conic coefficient (given in table 3); ai is the correction coefficient of the i-th order of the aspherical surface. Table 4 shows the higher order coefficients A4, A6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, a30 for each aspherical surface.
TABLE 4 Table 4
Fig. 6 shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 7 shows astigmatic curves of the optical imaging lens of embodiment 2, which represent meridional image plane curvature and sagittal image plane curvature. Fig. 8 shows distortion curves of the optical imaging lens of embodiment 2, which represent distortion magnitude values corresponding to different angles of view. Fig. 9 shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging surface S17 after light passes through the lens. As can be seen from fig. 6 to 9, the optical imaging lens provided in embodiment 2 can achieve good imaging quality.
The embodiment of the application also provides a camera module, and the camera module is assembled with the optical imaging lens. The implementation manner of the optical imaging lens embodiment is also suitable for the embodiment of the camera module, and can achieve the same technical effect, and is not described herein.
Other constructions and operations of camera modules according to embodiments of the present application are known to those of ordinary skill in the art and will not be described in detail herein.
The embodiment of the application also provides electronic equipment, and the electronic equipment is assembled with the camera module.
Other constructions and operations of electronic devices according to embodiments of the present application are known to those of ordinary skill in the art and will not be described in detail herein.
In the embodiment of the application, the electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (personal digital assistant, PDA), or the like.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An optical imaging lens is characterized by comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from an object side to an image side along an optical axis;
the first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;
the second lens has optical power;
the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface;
the fourth lens has negative focal power, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface;
the fifth lens has negative focal power;
the sixth lens element has positive refractive power, wherein an object-side surface thereof is convex, and an image-side surface thereof is convex;
the seventh lens has positive focal power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a convex surface;
the maximum half field angle of the optical imaging lens is larger than or equal to 64.5 degrees;
the Abbe number of the second lens is 19, and the curvature radius value of the image side surface of the second lens is R4, wherein 2.5 is less than 19/R4 is less than 3.5.
2. The optical imaging lens as claimed in claim 1, wherein the radius of curvature of the object side surface of the first lens is R1, and the radius of curvature of the image side surface of the first lens is R2, and 0.5 < (R1-R2)/(r1+r2) < 2.5.
3. The optical imaging lens as claimed in claim 1, wherein the radius of curvature of the object side surface of the second lens is R3, and the radius of curvature of the image side surface of the second lens is R4, -1.5 < R4/R3 < 1.5.
4. The optical imaging lens of claim 1, wherein the effective focal length value of the first lens is f1 and the effective focal length value of the second lens is f2, -4 < f2/f1 < -5; and/or the number of the groups of groups,
the effective focal length value of the third lens is f3, and the effective focal length value of the fourth lens is f4, -4 < f4/f3 < -3.
5. The optical imaging lens as claimed in claim 1, wherein a distance value from an object side surface of the first lens to an imaging surface of the optical imaging lens on the optical axis is TTL, and an effective focal length value of the sixth lens is f6,1 < TTL/f6 < 2.5.
6. The optical imaging lens as claimed in claim 1, wherein the radius of curvature of the object-side surface of the third lens element is R5, and the radius of curvature of the image-side surface of the third lens element is R6, -2 < R5/R6 < -1.5.
7. The optical imaging lens as claimed in claim 1, wherein a center thickness value of the first lens on the optical axis is CT1, and an air separation distance value between the first lens and the second lens on the optical axis is T12,1.5 < T12/CT1 < 3; and/or the number of the groups of groups,
the central thickness value of the third lens on the optical axis is CT3, and the air interval distance value between the third lens and the fourth lens on the optical axis is T34, wherein CT3/T34 is more than 20 and less than 21; and/or the number of the groups of groups,
the center thickness value of the fourth lens on the optical axis is CT4, and the air interval distance value between the fourth lens and the fifth lens on the optical axis is T45, wherein CT4/T45 is more than 0.5 and less than 1.
8. The optical imaging lens of claim 1, wherein the second lens has positive optical power, and an object-side surface thereof is convex and an image-side surface thereof is concave; the object side surface of the fifth lens is a concave surface, and the image side surface is a convex surface; or,
the second lens has negative focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a concave surface; the object side surface of the fifth lens is a concave surface, and the image side surface is a concave surface.
9. An imaging module comprising the optical imaging lens of any one of claims 1 to 8.
10. An electronic device comprising the camera module of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110997239.0A CN113721347B (en) | 2021-08-27 | 2021-08-27 | Optical imaging lens, camera module and electronic equipment |
| PCT/CN2022/114453 WO2023025183A1 (en) | 2021-08-27 | 2022-08-24 | Optical imaging lens, camera module and electronic device |
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| CN202110997239.0A CN113721347B (en) | 2021-08-27 | 2021-08-27 | Optical imaging lens, camera module and electronic equipment |
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| CN113721347B (en) * | 2021-08-27 | 2023-07-21 | 维沃移动通信（杭州）有限公司 | Optical imaging lens, camera module and electronic equipment |
| CN116774410B (en) * | 2023-08-21 | 2023-12-12 | 江西联创电子有限公司 | optical lens |
| CN116755222B (en) * | 2023-08-21 | 2023-11-28 | 江西联创电子有限公司 | optical lens |
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| JP5516110B2 (en) * | 2010-06-16 | 2014-06-11 | 株式会社リコー | Imaging lens, camera device, and portable information terminal device |
| CN114089515B (en) * | 2019-01-21 | 2023-03-24 | 大立光电股份有限公司 | Image pickup optical lens group |
| CN111487747B (en) * | 2019-01-29 | 2022-06-17 | 信泰光学(深圳)有限公司 | Lens device |
| CN110955028B (en) * | 2019-12-26 | 2022-04-26 | 诚瑞光学(常州)股份有限公司 | Image pickup optical lens |
| CN111308671A (en) * | 2020-04-09 | 2020-06-19 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN112817126B (en) * | 2021-01-26 | 2022-06-28 | 江西晶超光学有限公司 | Optical imaging lens, image capturing device and electronic equipment |
| CN113031224A (en) * | 2021-04-02 | 2021-06-25 | 常州市瑞泰光电有限公司 | Image pickup optical lens |
| CN113721347B (en) * | 2021-08-27 | 2023-07-21 | 维沃移动通信（杭州）有限公司 | Optical imaging lens, camera module and electronic equipment |
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