CN112230370A - Optical lens, camera module and electronic device - Google Patents
Optical lens, camera module and electronic device Download PDFInfo
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- CN112230370A CN112230370A CN202011147519.4A CN202011147519A CN112230370A CN 112230370 A CN112230370 A CN 112230370A CN 202011147519 A CN202011147519 A CN 202011147519A CN 112230370 A CN112230370 A CN 112230370A
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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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Abstract
The invention discloses an optical lens, a camera module and an electronic device. The optical lens includes, in order from an object side to an image side, a first lens having negative power, a second lens having negative power, a third lens having positive power, a fourth lens having negative power, a fifth lens having negative power, a sixth lens having positive power, and a seventh lens having negative power. The optical lens satisfies the following relation: -5< f2/f1<15, maximum optical distortion ≦ 10%, wherein f1 is the focal length of the first lens and f2 is the focal length of the second lens. The ratio of the focal length of the second lens to the focal length of the first lens of the optical lens disclosed by the embodiment of the invention is-5-15, so that the focal power of the lenses and the shape of the lenses can be reasonably distributed, the field angle of a system can be favorably enlarged, the imaging quality can be improved, the distortion can be reduced, and the optical lens is favorably used by a user.
Description
Technical Field
The present disclosure relates to optical imaging technologies, and particularly to an optical lens, a camera module and an electronic device.
Background
Along with the high-speed development of science and technology, the technique of getting for instance of shooing is also constantly developing, and optical lens among the correlation technique includes many pieces of lens, and the setting of many pieces of lens can reduce phase difference and colour difference better to improve the imaging quality, make the shaping effect better, promote user's experience. However, when the existing optical lens takes a picture and images, the distortion condition is severe, which affects the quality of the image, is not beneficial to the use of the user, and reduces the user experience.
Disclosure of Invention
In view of the above, embodiments of the present invention provide an optical lens, a camera module and an electronic device.
The optical lens according to the embodiment of the present invention includes, in order from an object side to an image side, a first lens having a negative refractive power, and a second lens having a negative refractive power, the object side surface of the second lens is a convex surface near the optical axis, the image side surface of the second lens is a concave surface near the optical axis, and the third lens has positive focal power, the object side surface of the third lens is a convex surface near the optical axis, and the third lens is a fourth lens with negative focal power, a fifth lens with negative focal power, a sixth lens with positive focal power, the image side surface of the sixth lens element is convex near the optical axis, the object side surface of the sixth lens element and the image side surface of the sixth lens element are aspheric, at least one of the object side surface of the sixth lens and the image side surface of the sixth lens is provided with at least one inflection point and a seventh lens with negative focal power, and the optical lens meets the following relational expression: -5< f2/f1<15, maximum optical distortion ≦ 10%, wherein f1 is the focal length of the first lens and f2 is the focal length of the second lens.
The ratio of the focal length of the second lens to the focal length of the first lens of the optical lens disclosed by the embodiment of the invention is-5-15, so that the focal power of the lenses and the shape of the lenses can be reasonably distributed, the field angle of a system can be favorably enlarged, the imaging quality can be improved, the distortion can be reduced, and the optical lens is favorably used by a user.
In some embodiments, the optical lens satisfies the following relationship:
2.5<tan(HFOV)*TTL/ImgH<3.5；
wherein tan (hfov) is a tangent value of half of a maximum field angle of the optical lens, TTL is a distance on an optical axis from the first lens object-side surface to an image plane of the optical lens, and ImgH is a maximum imaging circle radius of the optical lens.
Under the condition of satisfying the relational expression, the optical lens can realize a larger angle of view, the size of the optical lens can be reduced, the imaging of the optical lens is facilitated, the imaging of the optical lens is more comprehensive, and the miniaturization production of the optical lens is facilitated.
In some embodiments, the optical lens satisfies the following relationship:
-15<f5/f<20；
wherein f is an effective focal length of the optical lens, and f5 is a focal length of the fifth lens.
Under the condition of satisfying the relational expression, the focal power of the fifth lens can be reasonably distributed so as to cooperate with the aberration of the correction optical lens, reduce the distortion and improve the imaging quality of the optical lens.
In some embodiments, the optical lens satisfies the following relationship:
-5<(f1+f4)/f<-3；
wherein f1 is the focal length of the first lens, f4 is the focal length of the sixth lens, and f is the effective focal length of the optical lens.
Under the condition of satisfying the relational expression, the focal length of the fourth lens can be reasonably distributed, so that the field angle of the optical lens is enlarged, the imaging quality is improved, the distortion aberration can be effectively corrected, and the use by a user is facilitated.
In some embodiments, the optical lens satisfies the following relationship:
1.0<CT3/(T12+T23)<1.8；
wherein CT3 is a thickness of the third lens on an optical axis, T12 is an air space between the first lens and the second lens on the optical axis, and T23 is an air space between the second lens and the third lens on the optical axis.
Under the condition of satisfying the above relational expression, make first lens, second lens and third lens have sufficient space when the equipment, avoid the condition of bumping between two adjacent lenses, guaranteed optical lens's normal use to, be favorable to optical lens's frivolousization, also can avoid appearing leading to assembling the condition that is difficult because of numerical value undersize simultaneously, increase optical system's sensitivity.
In some embodiments, the optical lens satisfies the following relationship:
-4<f12/f456<-1.5；
wherein f12 is a combined focal length of the first lens and the second lens, and f456 is a combined focal length of the fourth lens, the fifth lens, and the sixth lens.
Under the condition of satisfying the above relational expression, the combined focal length of the first lens and the second lens, and the size and the direction of the combined focal length of the fourth lens, the fifth lens and the sixth lens can be reasonably distributed to adjust the system spherical aberration of the optical lens, so that the balance of the system spherical aberration of the optical lens is realized, and the molding quality of the optical lens is further improved.
In some embodiments, the optical lens satisfies the following relationship:
-6.0<R12/R13<-2.5；
wherein R12 is a radius of curvature of an object-side surface of the sixth lens element at an optical axis, and R13 is a radius of curvature of an image-side surface of the sixth lens element at the optical axis.
Under the condition of meeting the relation, the processing feasibility of the sixth lens can be ensured by adjusting the curvature radius of the sixth lens, the production of the sixth lens is facilitated, the spherical aberration and the astigmatism can be effectively corrected, and the imaging quality of the optical lens is improved.
In some embodiments, the optical lens satisfies the following relationship:
0<(R8+R9)/(R8-R9)<2.0；
wherein R8 is a radius of curvature of an object-side surface of the fourth lens element at an optical axis, and R9 is a radius of curvature of an image-side surface of the fourth lens element at the optical axis.
When the relational expression is satisfied, the relationship between the object side surface of the fourth lens and the image side surface of the fourth lens is adjusted, so that the optical deflection angles borne by the rest of the lenses can be effectively distributed, the distortion aberration can be changed, and the molding quality of the optical lens is improved.
The camera module according to an embodiment of the present invention includes the optical lens according to any one of the above embodiments and a photosensitive element disposed on an image side of the optical lens.
The ratio of the focal length of the second lens to the focal length of the first lens of the camera module is-5-15, so that the focal power of the lenses and the shape of the lenses can be reasonably distributed, the field angle of a system can be expanded, the imaging quality can be improved, the distortion can be reduced, and the camera module is beneficial to users.
The electronic device comprises a shell and the camera module, wherein the camera module is arranged on the shell.
The ratio of the focal length of the second lens to the focal length of the first lens of the electronic device is-5-15, so that the focal power of the lenses and the shape of the lenses can be reasonably distributed, the field angle of a system can be expanded, the imaging quality can be improved, the distortion can be reduced, and the electronic device is favorable for users to use.
Additional aspects and advantages of embodiments of the invention 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 invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an optical lens according to a first embodiment of the present invention;
FIG. 2A is a spherical aberration graph (mm) according to a first embodiment of the present invention;
FIG. 2B is a graph of astigmatism (mm) of the first embodiment of the present invention;
fig. 2C is a distortion curve (%) of the first embodiment of the present invention;
fig. 3 is a schematic structural diagram of an optical lens according to a second embodiment of the present invention;
FIG. 4A is a spherical aberration chart (mm) of the second embodiment of the present invention;
FIG. 4B is an astigmatism graph (mm) of a second embodiment of the present invention;
fig. 4C is a distortion curve (%) of the second embodiment of the present invention;
fig. 5 is a schematic structural diagram of an optical lens according to a third embodiment of the present invention;
FIG. 6A is a spherical aberration chart (mm) of the third embodiment of the present invention;
FIG. 6B is a graph of astigmatism (mm) for example three of the present invention;
fig. 6C is a distortion curve (%) of the third embodiment of the present invention;
fig. 7 is a schematic structural diagram of an optical lens according to a fourth embodiment of the present invention;
FIG. 8A is a spherical aberration chart (mm) of example four of the present invention;
fig. 8B is an astigmatism graph (mm) of example four of the present invention;
fig. 8C is a distortion graph (%);
fig. 9 is a schematic structural diagram of an optical lens according to a fifth embodiment of the present invention;
FIG. 10A is a spherical aberration plot (mm) for example five of the present invention;
fig. 10B is an astigmatism graph (mm) of example five of the present invention;
fig. 10C is a distortion graph (%);
fig. 11 is a schematic structural diagram of a camera module according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Referring to fig. 1, the real-time optical lens system 10 of the present invention includes, from an object side to an image side, a first lens L1 with negative power, a second lens L2 with power, a third lens L3 with positive power, a fourth lens L4 with negative power, a fifth lens L5 with power, a sixth lens L6 with positive power, and a seventh lens L7 with negative power.
The first lens L1 has an object-side surface S1 and an image-side surface S2. The second lens L2 has an object-side surface S3 and an image-side surface S4, the object-side surface S3 of the second lens L2 is convex in the vicinity of the optical axis, and the image-side surface S4 of the second lens L2 is concave in the vicinity of the optical axis. The third lens element L3 has an object-side surface S5 and an image-side surface S6, and the object-side surface S5 of the third lens element L3 is convex in the vicinity of the optical axis. The fourth lens L4 has an object-side surface S7 and an image-side surface S8. The fifth lens L5 has an object-side surface S9 and an image-side surface S10. The sixth lens element L6 has an object-side surface S11 and an image-side surface S12, the image-side surface S12 of the sixth lens element L6 is convex near the optical axis, the object-side surface S11 of the sixth lens element L6 and the image-side surface S12 of the sixth lens element L6 are both aspheric, at least one inflection point is disposed on at least one of the object-side surface S11 of the sixth lens element L6 and the image-side surface S12 of the sixth lens element L6, that is, the object-side surface S11 of the sixth lens element L6 has an inflection point, and the image-side surface S12 of the sixth lens element L6 has no inflection point; alternatively, the object-side surface S11 of the sixth lens L6 has no inflection point, and the image-side surface S12 of the sixth lens L6 has one inflection point; alternatively, the object-side surface S11 of the sixth lens L6 has an inflection point, and the image-side surface S12 of the sixth lens L6 has an inflection point; alternatively, the object-side surface S11 of the sixth lens L6 is provided with a plurality of inflection points, and the image-side surface S12 of the sixth lens L6 is not provided with inflection points; alternatively, the object-side surface S11 of the sixth lens L6 is not provided with inflection points, and the image-side surface S12 of the sixth lens L6 is provided with a plurality of inflection points; alternatively, the object-side surface S11 of the sixth lens L6 has a plurality of inflection points, and the image-side surface S12 of the sixth lens L6 has a plurality of inflection points; alternatively, the object-side surface S11 of the sixth lens L6 is provided with one inflection point, and the image-side surface S12 of the sixth lens L6 is provided with a plurality of inflection points; alternatively, the object-side surface S11 of the sixth lens L6 has a plurality of inflection points, and the image-side surface S12 of the sixth lens L6 has one inflection point. The seventh lens L7 has an object-side surface S13 and an image-side surface S14.
The inflection point is a point where a tangent line passes through a curve (i.e., a concave-convex boundary point of the curve).
In some embodiments, the optical lens 10 further includes an aperture stop STO. The aperture stop STO may be provided on the surface of any one of the lenses, or before the first lens L1, or between any two of the lenses, or between the seventh lens L7 and the photosensitive element 20.
When the optical lens 10 is used for imaging, light rays emitted or reflected by the subject OBJ enter the optical lens 10 from the object-side direction, pass through 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, and finally converge on the imaging surface S17.
Further, the optical lens 10 satisfies the following relational expression:
-5< f2/f1<15, maximum optical distortion ≦ 10%;
where f1 is the focal length of the first lens L1, and f2 is the focal length of the second lens L2.
That is, f2/f1 can be any value in the (-5, 15) interval, for example, the value is-4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1, -0.5, 0, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10.5, 11, 12, 13, 13.5, 14, 14.5, etc.
The maximum optical distortion is less than or equal to 10%, so that the distortion condition of the optical lens 10 can be reduced, the imaging quality of the optical lens 10 is improved, and the user experience is improved.
The ratio of the focal length of the second lens L2 to the focal length of the first lens L1 of the optical lens 10 of the embodiment of the present invention is between-5 and 15, so that the focal power of the lenses and the shape of the lenses can be reasonably allocated, which is beneficial to expanding the field angle of the system, improving the imaging quality, reducing the occurrence of distortion, and being beneficial to the use of users.
In some embodiments, the optical lens 10 satisfies the following relationship:
2.5<tan(HFOV)*TTL/ImgH<3.5；
here, tan (hfov) is a tangent value of half of the maximum angle of view of the optical lens 10, TTL is a distance on the optical axis from the object-side surface S1 of the first lens L1 to the image forming surface S17 of the optical lens 10, and ImgH is a maximum image circle radius of the optical lens 10.
That is, tan (hfov) · TTL/ImgH may be any value in the interval (2.5,3.5), for example, 2.55, 2.56, 2.6, 2.62, 2.65, 2.68, 2.7, 2.75, 2.79, 2.8, 2.83, 2.86, 2.91, 2.94, 2.95, 2.99, 3, 3.02, 3.1, 3.18, 3.28, 3.4, 3.44, 3.48, 3.49, and the like.
With the above relational expression satisfied, the optical lens 10 can realize a larger angle of view, and the size of the optical lens 10 can be reduced, which is advantageous for imaging of the optical lens 10, making the imaging of the optical lens 10 more comprehensive, and is advantageous for miniaturized production of the optical lens 10.
In some embodiments, the optical lens 10 satisfies the following relationship:
-15<f5/f<20；
where f is the effective focal length of the optical lens 10, and f5 is the focal length of the fifth lens L5.
That is, f5/f can be any value in the (-15, 20) interval, for example, the value is-14.5, -14, -13.5, -13, -12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 17.8, 18, 19, 19.5, 19.8, etc.
When the above relational expression is satisfied, the refractive power of the fifth lens L5 can be reasonably distributed to correct the aberration of the optical lens 10, reduce the occurrence of distortion, and improve the imaging quality of the optical lens 10.
In some embodiments, the optical lens 10 satisfies the following relationship:
-5<(f1+f4)/f<-3；
where f1 is the focal length of the first lens L1, f4 is the focal length of the sixth lens L6, and f is the effective focal length of the optical lens 10.
That is, f1+ f4 can be any value within the interval (-5, -3), for example, the values are-4.9, -4.8, -4.7, -4.5, -4.3, -4, -3.8, -3.7, -3.65, -3.62, -3.6, -3.58, -3.55, -3.52, -3.48, -3.45, -3.41, -3.38, -3.35, -3.32, -3.3, -3.28, -3.24, -3.21, -3.18, -3.16, -3.13, -3.11, -3.08, -3.05, -3.01, etc.
When the above relational expression is satisfied, the focal length of the fourth lens L4 can be reasonably distributed, so that the field angle of the optical lens 10 is enlarged, the imaging quality is improved, and the distortion aberration can be effectively corrected, which is beneficial to the use of the user.
In some embodiments, the optical lens 10 satisfies the following relationship:
1.0<CT3/(T12+T23)<1.8；
CT3 is the thickness of the third lens L3 on the optical axis, T12 is the air space between the first lens L1 and the second lens L2 on the optical axis, and T23 is the air space between the second lens L2 and the third lens L3 on the optical axis.
That is, CT3/(T12+ T23) may be any value in the interval (1,1.8), for example, it may take values of 1.05, 1.06, 1.08, 1.09, 1.1, 1.12, 1.15, 1.17, 1.19, 1.21, 1.23, 1.25, 1.29, 1.32, 1.35, 1.38, 1.39, 1.45, 1.46, 1.49, 1.52, 1.53, 1.58, 1.62, 1.64, 1.69, 1.75, 1.78, etc.
Under the condition of satisfying the above relational expression, the first lens L1, the second lens L2 and the third lens L3 have enough space during assembling, so as to avoid collision between two adjacent lenses, ensure normal use of the optical lens 10, facilitate thinning of the optical lens 10, and avoid difficult assembling due to over-small numerical values, thereby increasing sensitivity of the optical system.
In some embodiments, the optical lens 10 satisfies the following relationship:
-4<f12/f456<-1.5；
where f12 is a combined focal length of the first lens L1 and the second lens L2, and f456 is a combined focal length of the fourth lens L4, the fifth lens L5, and the sixth lens L6.
That is, f12/f456 can be any value in the range of (-4, -1.5), for example, the values are-3.98, -3.95, -3.92, -3.9, -3.85, -3.8, -3.76, -3.7, -3.61, -3.59, -3.52, -3.48, -3.4, -3.38, -3.3, -3.2, -3.1, -3, -2.8, -2.6, -2.3, -2.1, -1.95, -1.85, -1.78, -1.65, -1.55, -1.45, etc.
Under the condition of satisfying the above relation, the combined focal length of the first lens L1 and the second lens L2, and the combined focal length of the fourth lens L4, the fifth lens L5, and the sixth lens L6 can be reasonably distributed to adjust the system spherical aberration of the optical lens 10, so as to achieve the balance of the system spherical aberration of the optical lens 10, and further improve the molding quality of the optical lens 10.
In some embodiments, the optical lens 10 satisfies the following relationship:
-6.0<R12/R13<-2.5；
wherein R12 is a radius of curvature of an object-side surface of the sixth lens element L6 at the optical axis, and R13 is a radius of curvature of an image-side surface of the sixth lens element L6 at the optical axis.
That is, R12/R13 can be any value within the range of (-6, -2.5), for example, the values are-5.9, -5.8, -5.7, -5.6, -5.5, -5.4, -5.2, -5.1, -5, -4.9, -4.7, -4.6, -4.5, -4.2, -4.1, -3.8, -3.7, -3.5, -3.4, -3, -2.9, -2.8, -2.7, -2.6, -2.55, etc.
Under the condition of satisfying the above relation, the processing feasibility of the sixth lens element L6 can be ensured by adjusting the curvature radius of the sixth lens element L6, which is beneficial to the production of the sixth lens element L6, and the spherical aberration and astigmatism can be effectively corrected, thereby improving the imaging quality of the optical lens 10.
In some embodiments, the optical lens 10 satisfies the following relationship:
0<(R8+R9)/(R8-R9)<2.0；
wherein R8 is a radius of curvature of an object-side surface of the fourth lens element L4 at the optical axis, and R9 is a radius of curvature of an image-side surface of the fourth lens element L4 at the optical axis.
That is, the value of (R8+ R9)/(R8-R9) may be any value in the interval (0,2), and for example, may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.05, 1.1, 1.15, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.82, 1.85, 1.89, 1.92, 1.95, 1.98, or the like.
When the above relational expression is satisfied, by adjusting the relationship between the object-side surface of the fourth lens element L4 and the image-side surface of the fourth lens element L4, the optical deflection angles borne by the remaining lens elements can be effectively distributed, and the distortion aberration can be changed, thereby improving the molding quality of the optical lens 10.
In some embodiments, 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 are all made of plastic.
Since the first lens L1 to the seventh lens L7 are all plastic lenses, the optical lens 10 can be ultra-thin while effectively eliminating aberration and satisfying high pixel requirements, and has low cost.
In the embodiment of the present invention, the infrared filter L8 is made of glass. Of course, in other embodiments, the infrared filter L8 may be made of other materials. The specific setting can be according to the actual conditions. And are not limited herein.
In some embodiments, at least one surface of at least one lens in the optical lens 10 is aspheric. For example, in the embodiment of the present invention, the object-side surface S1 and the image-side surface S2 of the first lens L1 are aspheric, the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspheric, the object-side surface S5 and the image-side surface S6 of the third lens L3 are aspheric, the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are aspheric, the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are aspheric, the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are aspheric, the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspheric, and the object-side surface S15 and the image-side surface S16 of the infrared filter are spherical.
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 are all aspheric lenses, and the infrared filter L8 is a spherical surface. The aspherical surface has a surface shape determined by the following formula:
wherein Z is the longitudinal distance between any point on the aspheric surface and the surface vertex, r is the distance between any point on the aspheric surface and the optical axis, c is the vertex curvature (the reciprocal of the curvature radius), k is the conic constant, and Ai is the correction coefficient of the i-th order of the aspheric surface.
Thus, the optical lens 10 can effectively reduce the total length of the optical lens 10 by adjusting the curvature radius and the aspheric coefficient of each lens surface, and can effectively correct the aberration of the optical lens 10 to improve the imaging quality.
The first embodiment is as follows:
referring to fig. 1, in the first embodiment, the first lens L1 has negative power, the second lens L2 has negative power, the third lens L3 has positive power, the fourth lens L4 has negative power, the fifth lens L5 has negative power, the sixth lens L6 has positive power, and the seventh lens L7 has negative power.
The object-side surface S1 is concave near the optical axis, the object-side surface S1 is convex near the circumference, and the image-side surface S2 is concave. The object-side surface S3 is convex and the image-side surface S4 is concave. The object-side surface S5 is convex, and the image-side surface S6 is convex. The object-side surface S7 is concave, the image-side surface S8 is concave near the optical axis, and the image-side surface S8 is convex near the circumference. The object-side surface S9 is convex and the image-side surface S10 is concave. The object-side surface S11 is convex near the optical axis, the object-side surface S11 is concave near the circumference, and the image-side surface S12 is convex. The object-side surface S13 is convex near the optical axis, the object-side surface S13 is concave near the circumference, the image-side surface S14 is concave near the optical axis, and the image-side surface S14 is convex near the circumference. Further, at least one of object side S11 and image side S12 includes at least one point of inflection. In this way, the angle of incidence of the light rays in the off-axis field on the photosensitive element 20 can be effectively suppressed, thereby correcting the aberration of the off-axis field.
Referring to fig. 2A to 2C, the optical lens 10 satisfies the following table conditions:
TABLE 1
In table 1, f is the effective focal length of the optical lens 10; FNO is the f-number of the optical lens 10; the HFOV is half of the maximum field angle of the optical lens 10; TTL is the total optical length of the optical lens 10, i.e., the distance from the object-side surface of the first lens element to the image plane of the optical lens on the optical axis. Wherein the units of the Y radius (curvature radius), the thickness and the focal length are mm. The reference wavelengths of the focal length, refractive index and Abbe number are all 587.6 nm.
TABLE 2
The conic coefficients K and the even-order correction coefficients Ai of the aspherical surfaces (S1-S14) of the optical lens 10 are listed in table 2 above, and are derived from the above-mentioned surface shape formula of the aspherical surfaces.
Fig. 2A to 2C are a spherical aberration graph, an astigmatism graph, and a distortion graph, respectively, in the first embodiment.
The abscissa of the spherical aberration curve represents the focus offset, and the ordinate represents the normalized field of view, and when the wavelengths given in fig. 2A are 656.2725nm, 587.5618nm, and 486.1327nm, respectively, the focus offsets of different fields of view are all within 0-0.01 mm, which indicates that the optical lens 10 in this embodiment has a small spherical aberration and a good imaging quality.
The abscissa of the astigmatism graph represents the focus offset, the ordinate represents the image height, and the unit is mm, and the astigmatism curve given in fig. 2B represents that the focus offsets of the sagittal image plane and the meridional image plane are within ± 0.1mm when the wavelength is 587.5618nm, which shows that the optical lens 10 in this embodiment has small astigmatism and good imaging quality.
The abscissa of the distortion curve graph represents the distortion rate, the ordinate represents the image height, the unit is mm, and the distortion curve given in fig. 2C represents that the distortion is within ± 3.4% when the wavelength is 587.5618nm, which shows that the distortion of the optical lens 10 in this embodiment is better corrected and the imaging quality is better.
Example two
Referring to fig. 3, in the second embodiment, the first lens L1 has negative power, the second lens L2 has positive power, the third lens L3 has positive power, the fourth lens L4 has negative power, the fifth lens L5 has negative power, the sixth lens L6 has positive power, and the seventh lens L7 has negative power.
The object-side surface S1 is concave near the optical axis, the object-side surface S1 is convex near the circumference, and the image-side surface S2 is concave. The object-side surface S3 is convex and the image-side surface S4 is concave. The object-side surface S5 is convex, and the image-side surface S6 is convex. The object-side surface S7 is concave, the image-side surface S8 is concave near the optical axis, and the image-side surface S8 is convex near the circumference. The object-side surface S9 is convex and the image-side surface S10 is concave. The object-side surface S11 is convex near the optical axis, the object-side surface S11 is concave near the circumference, and the image-side surface S12 is convex. The object-side surface S13 is convex near the optical axis, the object-side surface S13 is concave near the circumference, the image-side surface S14 is concave near the optical axis, and the image-side surface S14 is convex near the circumference. Further, at least one of object side S11 and image side S12 includes at least one point of inflection. In this way, the angle of incidence of the light rays in the off-axis field on the photosensitive element 20 can be effectively suppressed, thereby correcting the aberration of the off-axis field.
Referring to fig. 4A to 4C, the optical lens 10 satisfies the following table conditions:
TABLE 3
In table 3, f is the effective focal length of the optical lens 10; FNO is the f-number of the optical lens 10; the HFOV is half of the maximum field angle of the optical lens 10; TTL is the total optical length of the optical lens 10, i.e., the distance from the object-side surface of the first lens element to the image plane of the optical lens on the optical axis. Wherein the units of the Y radius (curvature radius), the thickness and the focal length are mm. The reference wavelengths of the focal length, refractive index and Abbe number are all 587.6 nm.
TABLE 4
The conic coefficient K and the even-order correction coefficient Ai of each aspherical surface (S1-S14) of the optical lens 10 are listed in table 4 above, and are derived from the above-mentioned surface shape formula of the aspherical surface.
Fig. 4A to 4B are a spherical aberration graph, an astigmatism graph, and a distortion graph, respectively, in the second embodiment.
The abscissa of the spherical aberration graph represents the focus offset, and the ordinate represents the normalized field of view, and when the wavelengths given in fig. 4A are 656.2725nm, 587.5618nm, and 486.1327nm, respectively, the focus offsets of different fields of view are all within ± 0.01mm, which indicates that the optical lens 10 in this embodiment has small spherical aberration and good imaging quality.
The abscissa of the astigmatism graph represents the focus offset and the ordinate represents the image height in mm. The astigmatism curve shown in fig. 4B indicates that the focal shifts of the sagittal image plane and the meridional image plane are within ± 0.5mm when the wavelength is 587.5618nm, which indicates that the optical lens 10 in this embodiment has small astigmatism and good imaging quality.
The abscissa of the distortion plot represents the distortion rate and the ordinate represents the image height in mm. The distortion curve shown in fig. 4C indicates that the distortion is within ± 3.4% at a wavelength of 587.5618nm, which indicates that the distortion of the optical lens 10 in this embodiment is better corrected and the imaging quality is better.
EXAMPLE III
Referring to fig. 5, in the third embodiment, the first lens L1 has negative power, the second lens L2 has positive power, the third lens L3 has positive power, the fourth lens L4 has negative power, the fifth lens L5 has negative power, the sixth lens L6 has positive power, and the seventh lens L7 has negative power.
The object-side surface S1 is convex and the image-side surface S2 is concave. The object-side surface S3 is convex and the image-side surface S4 is concave. The object-side surface S5 is convex, and the image-side surface S6 is convex. The object-side surface S7 is convex near the optical axis, the object-side surface S7 is concave near the circumference, and the image-side surface S8 is concave. The object-side surface S9 is convex, the image-side surface S10 is concave near the optical axis, and the image-side surface S10 is convex near the circumference. The object-side surface S11 is convex near the optical axis, the object-side surface S11 is concave near the circumference, and the image-side surface S12 is convex. The object-side surface S13 is convex near the optical axis, the object-side surface S13 is concave near the circumference, the image-side surface S14 is concave near the optical axis, and the image-side surface S14 is convex near the circumference. Further, at least one of object side S11 and image side S12 includes at least one point of inflection. In this way, the angle of incidence of the light rays in the off-axis field on the photosensitive element 20 can be effectively suppressed, thereby correcting the aberration of the off-axis field.
Referring to fig. 6A to 6C, the optical lens 10 satisfies the following table conditions:
TABLE 5
In table 5, f is the effective focal length of the optical lens 10; FNO is the f-number of the optical lens 10; the HFOV is half of the maximum field angle of the optical lens 10; TTL is the total optical length of the optical lens 10, i.e., the distance from the object-side surface of the first lens element to the image plane of the optical lens on the optical axis. Wherein the units of the Y radius (curvature radius), the thickness and the focal length are mm. The reference wavelengths of the focal length, refractive index and Abbe number are all 587.6 nm.
TABLE 6
The conic coefficients K and the even-order correction coefficients Ai of the aspherical surfaces (S1-S14) of the optical lens 10 are listed in table 6 above, and are derived from the above-mentioned surface shape formula of the aspherical surfaces.
Fig. 6A to 6C are a spherical aberration graph, an astigmatism graph, and a distortion graph, respectively, in the third embodiment.
The abscissa of the spherical aberration graph represents the focus offset, and the ordinate represents the normalized field of view, and when the wavelengths given in fig. 6A are 656.2725nm, 587.5618nm, and 486.1327nm, respectively, the focus offsets of different fields of view are all within ± 0.02mm, which indicates that the optical lens 10 in this embodiment has small spherical aberration and good imaging quality.
The abscissa of the astigmatism graph represents the focus offset and the ordinate represents the image height in mm. The astigmatism curve shown in fig. 6B indicates that the focal shifts of the sagittal image plane and the meridional image plane are within ± 0.05mm when the wavelength is 587.5618nm, which indicates that the optical lens 10 in this embodiment has small astigmatism and good imaging quality.
The abscissa of the distortion plot represents the distortion rate and the ordinate represents the image height in mm. The distortion curve shown in fig. 6C indicates that the distortion is within ± 3.4% at a wavelength of 587.5618nm, which indicates that the distortion of the optical lens 10 in this embodiment is better corrected and the imaging quality is better.
Example four
Referring to fig. 7, in the fourth embodiment, the first lens L1 has negative power, the second lens L2 has positive power, the third lens L3 has positive power, the fourth lens L4 has negative power, the fifth lens L5 has positive power, the sixth lens L6 has positive power, and the seventh lens L7 has negative power.
The object-side surface S1 is convex and the image-side surface S2 is concave. The object-side surface S3 is convex and the image-side surface S4 is concave. The object-side surface S5 is convex, and the image-side surface S6 is convex. The object-side surface S7 is convex near the optical axis, the object-side surface S7 is concave near the circumference, and the image-side surface S8 is concave. The object-side surface S9 is convex, the image-side surface S10 is concave near the optical axis, and the image-side surface S10 is convex near the circumference. The object-side surface S11 is convex near the optical axis, the object-side surface S11 is concave near the circumference, and the image-side surface S12 is convex. The object-side surface S13 is convex near the optical axis, the object-side surface S13 is concave near the circumference, the image-side surface S14 is concave near the optical axis, and the image-side surface S14 is convex near the circumference. Further, at least one of object side S11 and image side S12 includes at least one point of inflection. In this way, the angle of incidence of the light rays in the off-axis field on the photosensitive element 20 can be effectively suppressed, thereby correcting the aberration of the off-axis field.
Referring to fig. 8A to 8C, the optical lens 10 satisfies the following table conditions:
TABLE 7
In table 7, f is the effective focal length of the optical lens 10; FNO is the f-number of the optical lens 10; the HFOV is half of the maximum field angle of the optical lens 10; TTL is the total optical length of the optical lens 10, i.e., the distance from the object-side surface of the first lens element to the image plane of the optical lens on the optical axis. Wherein the units of the Y radius (curvature radius), the thickness and the focal length are mm. The reference wavelengths of the focal length, refractive index and Abbe number are all 587.6 nm.
TABLE 8
The conic coefficients K and the even-order correction coefficients Ai of the aspherical surfaces (S1-S14) of the optical lens 10 are listed in table 8 above, and are derived from the above-mentioned surface shape formula of the aspherical surfaces.
Fig. 8A to 8C are a spherical aberration graph, an astigmatism graph, and a distortion graph, respectively, in the fourth embodiment.
The abscissa of the spherical aberration graph represents the focus offset, and the ordinate represents the normalized field of view, and when the wavelengths given in fig. 8A are 656.2725nm, 587.5618nm, and 486.1327nm, respectively, the focus offsets of different fields of view are all within ± 0.02mm, which indicates that the optical lens 10 in this embodiment has small spherical aberration and good imaging quality.
The abscissa of the astigmatism graph represents the focus offset and the ordinate represents the image height in mm. The astigmatism curve shown in fig. 8B indicates that the focal shifts of the sagittal image plane and the meridional image plane are within ± 0.1mm when the wavelength is 587.5618nm, which indicates that the optical lens 10 in this embodiment has small astigmatism and good imaging quality.
The abscissa of the distortion plot represents the distortion rate and the ordinate represents the image height in mm. The distortion curve shown in fig. 8C indicates that the distortion is within ± 3.4% at a wavelength of 587.5618nm, which indicates that the distortion of the optical lens 10 is better corrected and the imaging quality is better in this embodiment.
EXAMPLE five
Referring to fig. 9, in the fifth embodiment, the first lens L1 has negative power, the second lens L2 has positive power, the third lens L3 has positive power, the fourth lens L4 has negative power, the fifth lens L5 has positive power, the sixth lens L6 has positive power, and the seventh lens L7 has negative power.
The object-side surface S1 is convex and the image-side surface S2 is concave. The object-side surface S3 is convex and the image-side surface S4 is concave. The object-side surface S5 is convex, and the image-side surface S6 is convex. Object side S7 is concave and image side S8 is concave. The object-side surface S9 is convex, the image-side surface S10 is concave near the optical axis, and the image-side surface S10 is convex near the circumference. The object-side surface S11 is convex near the optical axis, the object-side surface S11 is concave near the circumference, and the image-side surface S12 is convex. The object-side surface S13 is convex near the optical axis, the object-side surface S13 is concave near the circumference, the image-side surface S14 is concave near the optical axis, and the image-side surface S14 is convex near the circumference. Further, at least one of object side S11 and image side S12 includes at least one point of inflection. In this way, the angle of incidence of the light rays in the off-axis field on the photosensitive element 20 can be effectively suppressed, thereby correcting the aberration of the off-axis field.
Referring to fig. 10A to 10C, the optical lens 10 satisfies the following table conditions:
TABLE 9
In table 9, f is the effective focal length of the optical lens 10; FNO is the f-number of the optical lens 10; the HFOV is half of the maximum field angle of the optical lens 10; TTL is the total optical length of the optical lens 10, i.e., the distance from the object-side surface of the first lens element to the image plane of the optical lens on the optical axis. Wherein the units of the Y radius (curvature radius), the thickness and the focal length are mm. The reference wavelengths of the focal length, refractive index and Abbe number are all 587.6 nm.
The conic coefficient K and the even-order correction coefficient Ai of each aspherical surface (S1-S14) of the optical lens 10 are listed in table 10 above, and are derived from the surface shape formula of the above aspherical surfaces.
Fig. 10A to 10C are a spherical aberration graph, an astigmatism graph, and a distortion graph, respectively, in the fifth embodiment.
The abscissa of the spherical aberration graph represents the focus offset, and the ordinate represents the normalized field of view, and when the wavelengths given in fig. 10A are 656.2725nm, 587.5618nm, and 486.1327nm, respectively, the focus offsets of different fields of view are all within ± 0.02mm, which indicates that the optical lens 10 in this embodiment has small spherical aberration and good imaging quality.
The abscissa of the astigmatism graph represents the focus offset and the ordinate represents the image height in mm. The astigmatism curve shown in fig. 10B indicates that the focal shifts of the sagittal image plane and the meridional image plane are within ± 0.1mm when the wavelength is 587.5618nm, which indicates that the optical lens 10 in this embodiment has small astigmatism and good imaging quality.
The abscissa of the distortion plot represents the distortion rate and the ordinate represents the image height in mm. The distortion curve shown in fig. 10C indicates that the distortion is within ± 3.1% at a wavelength of 587.5618nm, which indicates that the distortion of the optical lens 10 is better corrected and the imaging quality is better in this embodiment.
The values of f2 and f1 in the first to fifth embodiments are as shown in table 11 below for the above relation-5 < f2/f1< 15.
TABLE 11
| - | f2/f1 | Value of f2/f1 |
| First embodiment | -60.77/(-5.54) | 10.969 |
| Second embodiment | 11.78/(-4.66) | -2.528 |
| Third embodiment | 14.29/(-4.36) | -3.278 |
| Fourth embodiment | 10.56/(-3.8) | -2.779 |
| Fifth embodiment | 9.19/(-3.64) | -2.525 |
For the above relation 2.5< tan (HFOV) × TTL/ImgH <3.5, the values of HFOV, TTL, ImgH in the first to fifth embodiments are as follows in table 12.
TABLE 12
| - | tan(HFOV)*TTL/ImgH | tan (HFOV) TTL/ImgH value |
| First embodiment | tan(56.3)*6.831/3.4 | 3.013 |
| Second embodiment | tan(60)*6.569/3.4 | 3.346 |
| Third embodiment | tan(56)*6.616/3.4 | 2.885 |
| Fourth embodiment | tan(57)*6.5/3.4 | 2.944 |
| Fifth embodiment | tan(55)*6.555/3.1 | 3.02 |
For the above relation-15 < f5/f <20, the values of f5, f in the first to fifth embodiments are as follows in table 13.
| - | f5/f | Value of f5/f |
| First embodiment | -30.02/2.39 | -12.561 |
| Second embodiment | -27.3/2.11 | -12.938 |
| Third embodiment | -19.25/2.37 | -8.122 |
| Fourth embodiment | 41.69/2.3 | 18.126 |
| Fifth embodiment | 28.65/2.15 | 13.325 |
The values of f1, f4 and f in the first to fifth embodiments are as follows in Table 14 for the above relation-3 < (f1+ f4)/f < -5.
TABLE 14
| - | (f1+f4)/f | Value of f5/f |
| First embodiment | (-5.54-4.69)/2.39 | -4.280 |
| Second embodiment | (-4.66-4.36)/2.11 | -4.275 |
| Third embodiment | (-4.36-5.27)/2.37 | -4.063 |
| Fourth embodiment | (-3.8-5.52)/2.3 | -4.052 |
| Fifth embodiment | (-3.64-4.16)/2.15 | -3.630 |
The values of CT3, T12, T23 in the first to fifth embodiments are as follows in table 15 for the above relation 1.0< CT3/(T12+ T23) < 1.8.
| CT3/(T12+T23) | CT3/(T12+ T23) value | |
| First embodiment | 0.956/(0.245+0.358) | 1.58 |
| Second embodiment | 1.02/(0.655+0.146) | 1.27 |
| Third embodiment | 0.92/(0.292+0.332) | 1.47 |
| Fourth embodiment | 0.904/(0.255+0.303) | 1.62 |
| Fifth embodiment | 0.9/(0.421+0.312) | 1.23 |
The values of f12, f456 in the first to fifth embodiments are as follows in table 16 for the above relation-4 < f12/f456< -1.5.
TABLE 16
| - | f12/f456 | Value of f12/f456 |
| First embodiment | -4.83/2.34 | -2.064 |
| Second embodiment | -8.02/2.21 | -3.62 |
| Third embodiment | -5.92/2.24 | -2.64 |
| Fourth embodiment | -5.63/2.22 | -2.54 |
| Fifth embodiment | -5.92/2.29 | -2.59 |
For the above relation-6.0 < R12/R13< -2.5, the values of R12, R13 in the first to fifth embodiments are as follows in Table 17.
TABLE 17
| - | R12/R13 | R12/R13 values |
| First embodiment | 5.022/-1.378 | -3.64 |
| Second embodiment | 6.253/-1.274 | -4.91 |
| Third embodiment | 4.352/-1.365 | -3.19 |
| Fourth embodiment | 5.583/-1.431 | -3.9 |
| Fifth embodiment | 8.532/-1.532 | -5.57 |
For the above relation 0< (R8+ R9)/(R8-R9) <2.0, the values of R8, R9 in the first to fifth embodiments are as follows in table 18.
| - | (R8+R9)/(R8-R9) | (R8+ R9)/(R8-R9) value |
| First embodiment | (-24.436+3.567)/(-24.436-3.567) | 0.75 |
| Second embodiment | (-12.492+3.3768)/(-12.492-3.3768) | 0.57 |
| Third embodiment | (160.979+3.382)/(160.979-3.382) | 1.04 |
| Fourth embodiment | (34.555+3.287)/((34.555-3.287)) | 1.21 |
| Fifth embodiment | (-10.493+3.723)/(-10.493-3.723) | 0.48 |
Referring to fig. 11, a camera module 100 according to an embodiment of the invention includes an optical lens 10 and a photosensitive element 20. The light receiving element 20 is disposed on the image side of the optical lens 10.
The photosensitive element 20 may be a Complementary Metal Oxide Semiconductor (CMOS) photosensitive element 20 or a Charge-coupled Device (CCD) photosensitive element 20.
The ratio of the focal length of the second lens L2 to the focal length of the first lens L1 of the camera module 100 of the embodiment of the invention is between-5 and 15, so that the focal power of the lenses and the shape of the lenses can be reasonably distributed, the field angle of the system can be expanded, the imaging quality can be improved, the distortion can be reduced, and the camera module is beneficial to users.
Referring to fig. 12, an electronic device 1000 according to an embodiment of the invention includes a housing 200 and a camera module 100. The camera module 100 is mounted on the housing 200.
The ratio of the focal length of the second lens L2 to the focal length of the first lens L1 of the electronic device 1000 in the embodiment of the invention is between-5 and 15, so that the focal power of the lenses and the shape of the lenses can be reasonably distributed, the field angle of the system can be favorably enlarged, the imaging quality can be improved, the distortion can be reduced, and the use by a user can be favorably realized.
The electronic device 1000 according to the embodiment of the present invention includes, but is not limited to, information terminal devices such as a smart phone (as shown in fig. 12), a mobile phone, a Personal Digital Assistant (PDA), a game machine, a Personal Computer (PC), a camera, a smart watch, and a tablet computer, and home appliances having a photographing function.
In the description of the specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like 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 invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention, which is defined by the claims and their equivalents.
Claims (10)
1. An optical lens, comprising, in order from an object side to an image side:
a first lens having a negative optical power;
the second lens with negative focal power, the object side surface of the second lens is a convex surface near the optical axis, and the image side surface of the second lens is a concave surface near the optical axis;
a third lens having a positive optical power, an object-side surface of the third lens being convex near an optical axis;
a fourth lens having a negative optical power;
a fifth lens having a negative optical power;
the image side surface of the sixth lens is a convex surface near an optical axis, both the object side surface of the sixth lens and the image side surface of the sixth lens are aspheric, and at least one of the object side surface of the sixth lens and the image side surface of the sixth lens is provided with at least one inflection point;
a seventh lens having a negative optical power;
the optical lens satisfies the following relation:
-5< f2/f1<15, maximum optical distortion ≦ 10%;
wherein f1 is the focal length of the first lens, and f2 is the focal length of the second lens.
2. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
2.5<tan(HFOV)*TTL/ImgH<3.5；
wherein tan (hfov) is a tangent value of half of a maximum field angle of the optical lens, TTL is a distance on an optical axis from the first lens object-side surface to an image plane of the optical lens, and ImgH is a maximum imaging circle radius of the optical lens.
3. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
-15<f5/f<20；
wherein f is an effective focal length of the optical lens, and f5 is a focal length of the fifth lens.
4. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
-5<(f1+f4)/f<-3；
wherein f1 is the focal length of the first lens, f4 is the focal length of the sixth lens, and f is the effective focal length of the optical lens.
5. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
1.0<CT3/(T12+T23)<1.8；
wherein CT3 is a thickness of the third lens on an optical axis, T12 is an air space between the first lens and the second lens on the optical axis, and T23 is an air space between the second lens and the third lens on the optical axis.
6. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
-4<f12/f456<-1.5；
wherein f12 is a combined focal length of the first lens and the second lens, and f456 is a combined focal length of the fourth lens, the fifth lens, and the sixth lens.
7. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
-6.0<R12/R13<-2.5；
wherein R12 is a radius of curvature of an object-side surface of the sixth lens element at an optical axis, and R13 is a radius of curvature of an image-side surface of the sixth lens element at the optical axis.
8. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
0<(R8+R9)/(R8-R9)<2.0；
wherein R8 is a radius of curvature of an object-side surface of the fourth lens element at an optical axis, and R9 is a radius of curvature of an image-side surface of the fourth lens element at the optical axis.
9. The utility model provides a camera module which characterized in that, camera module includes:
an optical lens as claimed in any one of claims 1 to 8; and
a light sensing element disposed on an image side of the optical lens.
10. An electronic device, comprising:
a housing; and
the camera module of claim 9, said camera module mounted to said housing.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112817126A (en) * | 2021-01-26 | 2021-05-18 | 江西晶超光学有限公司 | Optical imaging lens, image capturing device and electronic equipment |
| CN113359279A (en) * | 2021-06-16 | 2021-09-07 | 天津欧菲光电有限公司 | Optical lens assembly, lens module and electronic equipment |
| CN113777751A (en) * | 2021-09-10 | 2021-12-10 | 天津欧菲光电有限公司 | Optical lens, camera module and electronic equipment |
| WO2022174459A1 (en) * | 2021-02-22 | 2022-08-25 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Imaging lens assembly, camera module and imaging device |
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