CN111413783A - Optical imaging lens and electronic device - Google Patents
Optical imaging lens and electronic device Download PDFInfo
- Publication number
- CN111413783A CN111413783A CN202010396977.5A CN202010396977A CN111413783A CN 111413783 A CN111413783 A CN 111413783A CN 202010396977 A CN202010396977 A CN 202010396977A CN 111413783 A CN111413783 A CN 111413783A
- Authority
- CN
- China
- Prior art keywords
- lens
- image
- paraxial region
- optical imaging
- imaging lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Abstract
The invention discloses an optical imaging lens, wherein a first lens element with positive refractive power, a second lens element with negative refractive power has a convex object-side surface at paraxial region, a concave image-side surface at paraxial region, a convex object-side surface at paraxial region, a concave image-side surface at paraxial region, a positive refractive power, a convex object-side surface at paraxial region, a convex image-side surface at paraxial region, a negative refractive power, a concave object-side surface at paraxial region, a concave image-side surface at paraxial region, and at least one inflection point at an image-side surface far from optical axis region are reasonably arranged, can maintain higher imaging quality and effectively shorten the whole length of the lens group. The invention also discloses an electronic device.
Description
Technical Field
The invention relates to the technical field of optical imaging lenses, in particular to an optical imaging lens. The invention also relates to an electronic device.
Background
In recent years, with the rapid development of miniaturized camera lenses, the demand for compact image capture modules has increased, and with the advancement of semiconductor process technology, the pixel size of the photosensitive element has been reduced, and nowadays, electronic products are developed with a good function, a light weight, a small size and a light weight. Therefore, a miniaturized image pickup lens with good imaging quality is apparently the mainstream in the market.
With the rapid development of science and technology, the application range of the camera module is increasingly diversified, and with the development of portable electronic devices toward multi-functionalization, the requirements for the imaging quality of the camera module carried by the portable electronic device are also raised, and the volume limit of the camera module is also more severe. However, it is difficult for the prior art camera module with six lenses to meet the requirement of the current market for imaging quality, so that a camera module with seven lenses is required to meet the high standard of imaging quality required at present. However, the conventional imaging module with seven lenses is not easy to limit the size of the portable electronic device.
Disclosure of Invention
The invention aims to provide an optical imaging lens which can meet the requirements of high imaging quality and miniaturization. The invention also provides electronic equipment.
In order to achieve the purpose, the invention provides the following technical scheme:
an optical imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element arranged in sequence from an object side to an image side, each lens element having an object side facing the object side and an image side facing the image side, wherein: the first lens element with positive refractive power has a convex object-side surface at a paraxial region, the image-side surface at a paraxial region is concave, the object-side surface of the third lens element with positive refractive power has a convex image-side surface at a paraxial region, the image-side surface at a paraxial region is concave, the image-side surface of the fifth lens element with positive refractive power has a concave image-side surface at a paraxial region, the object-side surface of the sixth lens element with positive refractive power has a convex image-side surface at a paraxial region, the image-side surface at a paraxial region is convex, the seventh lens element with negative refractive power has a concave object-side surface at a paraxial region, the image-side surface at a paraxial region is concave, and the image-side surface at a paraxial region away from the optical axis has at least one inflection point, and the following conditions are satisfied:
1＜TTL/f＜1.55；
0.1≤T34/(CT3+CT4)≤0.5；
wherein TT L represents the optical total length of the optical imaging lens, f represents the focal length of the optical imaging lens, and T represents the focal length of the optical imaging lens34Representing the distance on the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens, CT3Representing the thickness of said third lens on the optical axis, CT4Represents the thickness of the fourth lens on the optical axis.
Preferably, the object-side surface of the first lens element is convex at a paraxial region and the image-side surface thereof is concave at a paraxial region.
Preferably, the following conditional formula is also satisfied: 0.8<(R32+R31)/(R32-R31)<4.4 in which R31Represents a radius of curvature, R, of an object-side surface of the third lens32Represents a radius of curvature of the image-side surface of the third lens.
Preferably, the fifth lens element with negative refractive power has a convex object-side surface at paraxial region, and further satisfies the following conditional expression: 0.4<R51/R52<2.1 in which R51Represents a radius of curvature, R, of an object-side surface of the fifth lens52Represents a radius of curvature of the image-side surface of the fifth lens.
Preferably, the object side surface of the sixth lens has at least one inflection point in a region away from the optical axis, and the image side surface of the sixth lens has at least one inflection point in a region away from the optical axis, and the following conditional expression is further satisfied: f. of6/|R61|+f6/|R62|<2.1 wherein f6Denotes a focal length, R, of the sixth lens61Represents a radius of curvature, R, of an object-side surface of the sixth lens62Represents a radius of curvature of the image-side surface of the sixth lens element.
Preferably, the following conditional formula is also satisfied: 1.6 < | f2/| < 3.3, where f2Represents the aboveFocal length of the second lens.
Preferably, the following conditional expression 0.35 < f/∑ CT ≦ 1.2 is also satisfied, where ∑ CT denotes a total sum of thicknesses of the respective lenses of the first lens to the seventh lens on the optical axis.
Preferably, the following conditional formula is also satisfied: ET 0.8 <7/CT7Less than or equal to 2.2, wherein ET7Representing the edge thickness, CT, of the seventh lens7The thickness of the seventh lens on the optical axis is indicated.
Preferably, the following conditional expression is also satisfied, 0.7 ≦ L CT15/LCT47Less than or equal to 1.7, wherein L CT15Representing the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the fifth lens, L CT47And the distance from the object side surface of the fourth lens to the image side surface of the seventh lens on the optical axis is represented.
Preferably, the following conditional formula is also satisfied: 1.1 < Fno < 1.65, where Fno represents the aperture value of the optical imaging lens.
An electronic device comprises an image pickup device, wherein the image pickup device comprises an electronic photosensitive element and an optical imaging lens, and the electronic photosensitive element is arranged on an imaging surface of the optical imaging lens.
According to the above technical solution, the optical imaging lens provided by the present invention includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, which are sequentially arranged from an object side to an image side, wherein an object side light passes through the respective lens elements in sequence to form an image on an image plane located at an image side of the seventh lens element. The optical imaging lens is of a seven-piece lens structure, and has good imaging quality by adopting reasonable surface shapes and optimal range combination of optical parameters of the lenses. The ratio of the total optical length to the focal length is reasonably configured, and the ratio of the distance from the image side surface of the third lens to the object side surface of the fourth lens on the optical axis to the sum of the thickness of the third lens on the optical axis and the thickness of the fourth lens on the optical axis is controlled, so that the overall structure of the lens is in a better thickness ratio, and the overall length of the optical lens is favorably shortened. Therefore, the optical imaging lens of the invention can effectively shorten the whole length of the lens group and meet the application requirements under the conditions of maintaining higher imaging quality and having a large field angle.
The electronic equipment provided by the invention can achieve the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of an optical imaging lens provided in embodiment 1 of the present invention;
fig. 2(a) and fig. 2(b) are an astigmatism graph and a distortion graph of the optical imaging lens in embodiment 1 of the present invention, respectively;
fig. 3 is a spherical aberration curve chart of the optical imaging lens in embodiment 1 of the present invention;
fig. 4 is a schematic view of an optical imaging lens provided in embodiment 2 of the present invention;
fig. 5(a) and 5(b) are an astigmatism graph and a distortion graph of the optical imaging lens in embodiment 2 of the present invention, respectively;
fig. 6 is a spherical aberration curve chart of the optical imaging lens in embodiment 2 of the present invention;
fig. 7 is a schematic view of an optical imaging lens system according to embodiment 3 of the present invention;
fig. 8(a) and 8(b) are an astigmatism graph and a distortion graph of the optical imaging lens in embodiment 3 of the present invention, respectively;
fig. 9 is a spherical aberration curve chart of the optical imaging lens in embodiment 3 of the present invention;
fig. 10 is a schematic view of an optical imaging lens according to embodiment 4 of the present invention;
fig. 11(a) and 11(b) are an astigmatism graph and a distortion graph of the optical imaging lens in embodiment 4 of the present invention, respectively;
fig. 12 is a spherical aberration curve chart of the optical imaging lens in embodiment 4 of the present invention;
fig. 13 is a schematic view of an optical imaging lens system according to embodiment 5 of the present invention;
fig. 14(a) and 14(b) are an astigmatism graph and a distortion graph of the optical imaging lens in example 5 of the present invention, respectively;
fig. 15 is a spherical aberration curve chart of the optical imaging lens in embodiment 5 of the present invention;
fig. 16 is a schematic view of an optical imaging lens according to embodiment 6 of the present invention;
fig. 17(a) and 17(b) are an astigmatism graph and a distortion graph of the optical imaging lens in example 6 of the present invention, respectively;
fig. 18 is a spherical aberration curve chart of the optical imaging lens in embodiment 6 of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an optical imaging lens, which is characterized in that a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens are sequentially arranged from an object space to an image space, and each lens is provided with an object side surface facing the object space and an image side surface facing the image space.
The first lens element with positive refractive power has a convex object-side surface at paraxial region and a concave image-side surface at paraxial region. The second lens element with negative refractive power has a convex object-side surface at paraxial region and a concave image-side surface at paraxial region. The object-side surface of the third lens element is convex at a paraxial region. The fourth lens element with positive refractive power has a convex object-side surface at paraxial region and a concave image-side surface at paraxial region. The fifth lens element with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The sixth lens element with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region, and has at least one inflection point in a region away from the optical axis and at least one inflection point in a region away from the optical axis. The seventh lens element with negative refractive power has a concave object-side surface at a paraxial region and a concave image-side surface at a paraxial region, and the image-side surface has at least one inflection point away from the optical axis region.
The optical imaging lens is of a seven-piece lens structure, and has good imaging quality by adopting reasonable surface shapes and optimal range combination of optical parameters of all lenses, wherein the size of the aperture is controlled, so that the optical imaging lens has large light incoming quantity, high imaging quality and large field angle. The ratio of the total optical length to the focal length is reasonably configured, and the ratio of the distance from the image side surface of the third lens to the object side surface of the fourth lens on the optical axis to the sum of the thickness of the third lens on the optical axis and the thickness of the fourth lens on the optical axis is controlled, so that the overall structure of the lens is in a better thickness ratio, and the overall length of the optical lens is favorably shortened. Therefore, the optical imaging lens of the invention can effectively shorten the whole length of the lens group and meet the application requirements under the conditions of maintaining higher imaging quality and having a large field angle.
Preferably, the optical imaging lens further satisfies the following conditional expression: 0.8<(R32+R31)/(R32-R31)<4.4 in which R31Represents a radius of curvature, R, of an object-side surface of the third lens32Represents a radius of curvature of the image-side surface of the third lens.
Preferably, the optical imaging lens further satisfies the following conditional expression: 0.4<R51/R52<2.1 in which R51Represents a radius of curvature, R, of an object-side surface of the fifth lens52Represents a radius of curvature of the image-side surface of the fifth lens.
Preferably, the optical imaging lensThe following conditional expressions are also satisfied: f. of6/|R61|+f6/|R62|<2.1 wherein f6Denotes a focal length, R, of the sixth lens61Represents a radius of curvature, R, of an object-side surface of the sixth lens62Represents a radius of curvature of the image-side surface of the sixth lens element.
Preferably, the optical imaging lens further satisfies the following conditional expression: 1.6 < | f2/| < 3.3, where f2Representing the focal length of the second lens.
Preferably, the optical imaging lens further satisfies the following conditional expression 0.35 < f/∑ CT ≦ 1.2, where ∑ CT represents the sum of the thicknesses of the respective lenses of the first lens to the seventh lens on the optical axis.
Preferably, the optical imaging lens further satisfies the following conditional expression: ET 0.8 <7/CT7Less than or equal to 2.2, wherein ET7Representing the edge thickness, CT, of the seventh lens7The thickness of the seventh lens on the optical axis is indicated.
Preferably, the optical imaging lens also satisfies the following conditional expression that 0.7 is not more than L CT15/LCT47Less than or equal to 1.7, wherein L CT15Representing the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the fifth lens, L CT47And the distance from the object side surface of the fourth lens to the image side surface of the seventh lens on the optical axis is represented.
Preferably, the optical imaging lens further satisfies the following conditional expression: 1.1 < Fno < 1.65, where Fno represents the aperture value of the optical imaging lens.
It should be noted that the refractive power refers to the refractive power of the optical system for reflecting the incident parallel light beam. The optical system has positive refractive power, which indicates that the refraction of the light rays is convergent; the optical system has negative refractive power, indicating that the refraction of light is divergent. In the optical imaging lens of the invention, if the refractive power or the focal length of the lens element does not define the position of the region, it means that the refractive power or the focal length of the lens element can be the refractive power or the focal length of the lens element at the paraxial region.
For each lens arrangement in the lens, under the condition that the distance from the object space to the image space is from left to right, the fact that the object side surface of the lens is convex means that any point on the passing surface of the object side surface of the lens is a tangent plane, the surface is always on the right side of the tangent plane, the curvature radius of the surface is positive, otherwise, the object side surface is concave, and the curvature radius of the surface is negative. The image side surface of the lens is convex, which means that any point on the passing surface of the image side surface of the lens is tangent, the surface is always on the left side of the tangent plane, the curvature radius is negative, otherwise, the image side surface is concave, and the curvature radius is positive. If a section is made through any point on the object-side or image-side surface of the lens, the surface has both a portion to the left of the section and a portion to the right of the section, and the surface has points of inflection. The above applies to the determination of the presence of irregularities at the paraxial region of the object-side surface and the image-side surface of the lens. In addition, the paraxial region refers to a region near the optical axis. In the optical imaging lens of the invention, if the lens surface is a convex surface and the position of the convex surface is not defined, it means that the convex surface can be positioned at the position of the lens surface near the optical axis; if the lens surface is concave and the position of the concave surface is not defined, it means that the concave surface can be located at the position of the lens surface near the optical axis.
In the optical imaging lens disclosed by the invention, the lenses are made of materials with high light transmittance and excellent machinability, for example, the lenses are made of plastics, so that the manufacturing and molding of the lenses are facilitated, the manufacturing yield is improved, and the production cost is also reduced. In addition, the object-side surface and the image-side surface of each lens can be Aspheric Surfaces (ASP), the aspheric surfaces can be easily made into shapes other than spherical surfaces, more control variables are obtained for reducing the aberration, and the number of the lenses is further reduced, so that the total length of the photographic lens can be effectively reduced. In addition, the interval can be arranged between any two adjacent lenses of the optical imaging lens, which is beneficial to the assembly of the lenses and improves the manufacturing yield.
In addition, in the optical imaging lens, at least one diaphragm can be arranged according to requirements so as to reduce stray light and be beneficial to improving the imaging quality. In the invention, the aperture configuration can be a front-mounted aperture, namely, the aperture is arranged between the object and the first lens, and the front-mounted aperture can enable the exit pupil of the optical imaging lens to generate a longer distance with the imaging surface, so that the optical imaging lens has a telecentric effect and can increase the efficiency of a CCD or a CMOS of an electronic photosensitive element for receiving images.
The optical imaging lens of the present invention will be described in detail with reference to specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
[ example 1 ]
Referring to fig. 1, a schematic structural diagram of an optical imaging lens according to embodiment 1 is shown. As can be seen from the figure, the optical imaging lens of the present embodiment includes a stop 10, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, and a seventh lens 17, which are sequentially arranged from an object side to an image side along an optical axis, each lens has an object side surface facing the object side and an image side surface facing the image side, and both the object side surface and the image side surface of each lens are aspheric.
The first lens element 11 with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The second lens element 12 with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The object-side surface of the third lens element 13 is convex at the paraxial region. The fourth lens element 14 with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The fifth lens element 15 with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The sixth lens element 16 with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region, and has at least one inflection point on the object-side surface in a region away from the optical axis and at least one inflection point on the image-side surface in a region away from the optical axis. The seventh lens element 17 with negative refractive power has a concave object-side surface at a paraxial region and a concave image-side surface at a paraxial region, and the image-side surface has at least one inflection point away from the optical axis region. In addition, the optical imaging lens further comprises an infrared filter 18 disposed between the seventh lens 17 and the imaging surface 19, and the infrared filter 18 filters out infrared band light entering the lens, so as to prevent infrared light from irradiating the photosensitive chip to generate noise. The optional filter is made of glass and does not affect the focal length.
The detailed optical data of embodiment 1 are shown in table 1-1, where the unit of the radius of curvature, the thickness and the focal length is mm, f is the focal length of the optical imaging lens, Fno is the aperture value, HFOV is half of the maximum field angle, and surfaces 1-18 sequentially represent the surfaces from the object side to the image side. Wherein surfaces 1-15 sequentially represent a diaphragm, a first lens object-side surface, a first lens image-side surface, a second lens object-side surface, a second lens image-side surface, a third lens object-side surface, a third lens image-side surface, a fourth lens object-side surface, a fourth lens image-side surface, a fifth lens object-side surface, a fifth lens image-side surface, a sixth lens object-side surface, a sixth lens image-side surface, a seventh lens object-side surface, and a seventh lens image-side surface.
TABLE 1-1
Each lens in the optical imaging lens adopts an aspheric surface design, and the curve equation of the aspheric surface is expressed as follows:
wherein X represents the relative distance between a point on the aspheric surface with a distance of Y from the optical axis and a tangent plane tangent to the vertex on the aspheric surface optical axis; r represents a radius of curvature; y represents a perpendicular distance between a point on the aspherical curve and the optical axis; k represents a conic coefficient; ai represents the i-th order aspheric coefficients.
The aspherical surface coefficients of the lenses of this embodiment are shown in Table 1-2, where k represents the conic coefficient in the aspherical curve equation, and A4-A16 represent the aspherical surface coefficients of 4 th to 16 th orders, respectively. The astigmatism graph, the distortion graph and the spherical aberration graph of the optical imaging lens of the embodiment are respectively shown in fig. 2(a), fig. 2(b) and fig. 3, wherein the wavelength in the astigmatism graph and the distortion graph is 0.555 μm, and the wavelength in the spherical aberration graph is 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm and 0.650 μm. In addition, the following tables of the embodiments correspond to the structural schematic diagram, the astigmatism graph, the distortion graph and the spherical aberration graph of the optical imaging lens of the embodiments, and the definitions of the data in the tables are the same as those of tables 1-1 and 1-2 of embodiment 1, which will not be described again.
Tables 1 to 2
[ example 2 ]
Referring to fig. 4, a schematic structural diagram of an optical imaging lens of embodiment 2 is shown. As can be seen from the figure, the optical imaging lens of the present embodiment includes a stop 20, a first lens 21, a second lens 22, a third lens 23, a fourth lens 24, a fifth lens 25, a sixth lens 26, and a seventh lens 27, which are sequentially arranged from an object side to an image side along an optical axis, each lens has an object side surface facing the object side and an image side surface facing the image side, and the object side surface and the image side surface of each lens are aspheric.
The first lens element 21 with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The second lens element 22 with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The object-side surface of the third lens element 23 is convex at the paraxial region. The fourth lens element 24 with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The fifth lens element 25 with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The sixth lens element 26 with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region, and has at least one inflection point on the object-side surface in a region away from the optical axis and at least one inflection point on the image-side surface in a region away from the optical axis. The seventh lens element 27 with negative refractive power has a concave object-side surface at a paraxial region and a concave image-side surface at a paraxial region, and the image-side surface has at least one inflection point away from the optical axis region. In addition, the optical imaging lens further includes an infrared filter 28 disposed between the seventh lens 27 and the imaging surface 29, and the infrared filter 28 filters the infrared band light entering the lens to prevent the infrared light from irradiating the photosensitive chip to generate noise. The optional filter is made of glass and does not affect the focal length.
Please refer to the following Table 2-1, Table 2-2 and Table 7. The corresponding astigmatism, distortion and spherical aberration plots are shown in fig. 5(a), 5(b) and 6, respectively.
TABLE 2-1
Tables 2 to 2
[ example 3 ]
Referring to fig. 7, a schematic structural diagram of an optical imaging lens of embodiment 3 is shown. As can be seen from the figure, the optical imaging lens of the present embodiment includes an aperture stop 30, a first lens 31, a second lens 32, a third lens 33, a fourth lens 34, a fifth lens 35, a sixth lens 36 and a seventh lens 37, which are arranged in sequence from an object side to an image side along an optical axis, each lens has an object side surface facing the object side and an image side surface facing the image side, and both the object side surface and the image side surface of each lens are aspheric.
The first lens element 31 with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The second lens element 32 with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The object-side surface of the third lens element 33 is convex at the paraxial region. The fourth lens element 34 with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The fifth lens element 35 with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The sixth lens element 36 with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region, and has at least one inflection point on the object-side surface in a region away from the optical axis and at least one inflection point on the image-side surface in a region away from the optical axis. The seventh lens element 37 with negative refractive power has a concave object-side surface at a paraxial region and a concave image-side surface at a paraxial region, and the image-side surface has at least one inflection point away from the optical axis. In addition, the optical imaging lens further includes an infrared filter 38 disposed between the seventh lens 37 and the imaging surface 39, and the infrared filter 38 filters the infrared band light entering the lens to prevent the infrared light from irradiating the photosensitive chip to generate noise. The optional filter is made of glass and does not affect the focal length.
Please refer to the following Table 3-1, Table 3-2 and Table 7. The corresponding astigmatism, distortion and spherical aberration plots are shown in fig. 8(a), 8(b) and 9, respectively.
TABLE 3-1
TABLE 3-2
[ example 4 ]
Referring to fig. 10, a schematic structural diagram of an optical imaging lens of embodiment 4 is shown. As can be seen from the figure, the optical imaging lens of the present embodiment includes an aperture stop 40, a first lens 41, a second lens 42, a third lens 43, a fourth lens 44, a fifth lens 45, a sixth lens 46 and a seventh lens 47 arranged in sequence from an object side to an image side along an optical axis, each lens has an object side surface facing the object side and an image side surface facing the image side, and the object side surface and the image side surface of each lens are aspheric.
The first lens element 41 with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The second lens element 42 with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The object-side surface of the third lens element 43 is convex at the paraxial region. The fourth lens element 44 with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The fifth lens element 45 with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The sixth lens element 46 with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region, and has at least one inflection point in a region away from the optical axis and at least one inflection point in a region away from the optical axis. The seventh lens element 47 with negative refractive power has a concave object-side surface at a paraxial region and a concave image-side surface at a paraxial region, and the image-side surface has at least one inflection point away from the optical axis. In addition, the optical imaging lens further includes an infrared filter 48 disposed between the seventh lens 47 and the imaging surface 49, and the infrared filter 48 filters the infrared band light entering the lens to prevent the infrared light from irradiating the photosensitive chip to generate noise. The optional filter is made of glass and does not affect the focal length.
Please refer to the following Table 4-1, Table 4-2 and Table 7. The corresponding astigmatism, distortion, and spherical aberration plots are shown in fig. 11(a), 11(b), and 12, respectively.
TABLE 4-1
TABLE 4-2
[ example 5 ]
Referring to fig. 13, a schematic structural diagram of an optical imaging lens of embodiment 5 is shown. As can be seen from the figure, the optical imaging lens of the present embodiment includes a stop 50, a first lens 51, a second lens 52, a third lens 53, a fourth lens 54, a fifth lens 55, a sixth lens 56, and a seventh lens 57 arranged in sequence from an object side to an image side along an optical axis, each lens has an object side surface facing the object side and an image side surface facing the image side, and both the object side surface and the image side surface of each lens are aspheric.
The first lens element 51 with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The second lens element 52 with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The object-side surface of the third lens element 53 is convex at the paraxial region. The fourth lens element 54 with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The fifth lens element 55 with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The sixth lens element 56 with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region, and has at least one inflection point on the object-side surface in a region away from the optical axis and at least one inflection point on the image-side surface in a region away from the optical axis. The seventh lens element 57 with negative refractive power has a concave object-side surface at a paraxial region and a concave image-side surface at a paraxial region, and the image-side surface has at least one inflection point away from the optical axis region. In addition, the optical imaging lens further includes an infrared filter 58 disposed between the seventh lens 57 and the imaging surface 59, and the infrared filter 58 filters out the infrared band light entering the lens, so as to prevent the infrared light from irradiating the photosensitive chip to generate noise. The optional filter is made of glass and does not affect the focal length.
Please refer to the following Table 5-1, Table 5-2 and Table 7. The corresponding astigmatism, distortion, and spherical aberration plots are shown in fig. 14(a), 14(b), and 15, respectively.
TABLE 5-1
TABLE 5-2
[ example 6 ]
Referring to fig. 16, a schematic structural diagram of an optical imaging lens of embodiment 6 is shown. As can be seen from the figure, the optical imaging lens of the present embodiment includes a stop 60, a first lens 61, a second lens 62, a third lens 63, a fourth lens 64, a fifth lens 65, a sixth lens 66 and a seventh lens 67, which are sequentially arranged from an object side to an image side along an optical axis, each lens has an object side surface facing the object side and an image side surface facing the image side, and the object side surface and the image side surface of each lens are aspheric.
The first lens element 61 with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The second lens element 62 with negative refractive power has a convex object-side surface at paraxial region and a concave image-side surface at paraxial region. The object-side surface of the third lens element 63 is convex at the paraxial region. The fourth lens element 64 with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The fifth lens element 65 with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. The sixth lens element 66 with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region. The seventh lens element 67 with negative refractive power has a concave object-side surface at a paraxial region and a concave image-side surface at a paraxial region, and the image-side surface has at least one inflection point away from the optical axis. In addition, the optical imaging lens further includes an infrared filter 68 disposed between the seventh lens 67 and the imaging surface 69, and the infrared filter 68 filters the infrared band light entering the lens to prevent the infrared light from irradiating the photosensitive chip to generate noise. The optional filter is made of glass and does not affect the focal length.
Please refer to the following Table 6-1, Table 6-2 and Table 7. The corresponding astigmatism, distortion, and spherical aberration plots are shown in fig. 17(a), 17(b), and 18, respectively.
TABLE 6-1
TABLE 6-2
In summary, examples 1 to 6 each satisfy the relationship shown in table 7.
TABLE 7
Correspondingly, the embodiment of the invention also provides electronic equipment which comprises an image pickup device, wherein the image pickup device comprises an electronic photosensitive element and the optical imaging lens, and the electronic photosensitive element is arranged on an imaging surface of the optical imaging lens.
In the electronic device of the embodiment, the optical imaging lens included in the imaging device can effectively shorten the overall length of the lens group and meet the application requirements while maintaining high imaging quality and having a large field angle.
The optical imaging lens and the electronic device provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (11)
1. An optical imaging lens, characterized in that, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens are arranged in sequence from an object space to an image space, each lens has an object side surface facing the object space and an image side surface facing the image space, wherein: the first lens element with positive refractive power has a convex object-side surface at a paraxial region, the image-side surface at a paraxial region is concave, the object-side surface of the third lens element with positive refractive power has a convex image-side surface at a paraxial region, the image-side surface at a paraxial region is concave, the image-side surface of the fifth lens element with positive refractive power has a concave image-side surface at a paraxial region, the object-side surface of the sixth lens element with positive refractive power has a convex image-side surface at a paraxial region, the image-side surface at a paraxial region is convex, the seventh lens element with negative refractive power has a concave object-side surface at a paraxial region, the image-side surface at a paraxial region is concave, and the image-side surface at a paraxial region away from the optical axis has at least one inflection point, and the following conditions are satisfied:
1＜TTL/f＜1.55；
0.1≤T34/(CT3+CT4)≤0.5；
wherein TT L represents the optical total length of the optical imaging lens, f represents the focal length of the optical imaging lens, and T represents the focal length of the optical imaging lens34Representing the distance on the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens, CT3Representing the thickness of said third lens on the optical axis, CT4Represents the thickness of the fourth lens on the optical axis.
2. The optical imaging lens of claim 1, wherein the first lens element has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region.
3. The optical imaging lens according to claim 1, characterized in that the following conditional expression is further satisfied: 0.8<(R32+R31)/(R32-R31)<4.4 in which R31Represents a radius of curvature, R, of an object-side surface of the third lens32Represents a radius of curvature of the image-side surface of the third lens.
4. The optical imaging lens assembly of claim 1, wherein the fifth lens element with negative refractive power has a convex object-side surface at a paraxial region, and further satisfies the following conditional expression: 0.4<R51/R52<2.1 in which R51Represents a radius of curvature, R, of an object-side surface of the fifth lens52Represents a radius of curvature of the image-side surface of the fifth lens.
5. The optical imaging lens of claim 1, wherein the object side surface of the sixth lens element has at least one inflection point in a region away from the optical axis, and the image side surface thereof has at least one inflection point in a region away from the optical axis, and further satisfies the following conditional expression: f. of6/|R61|+f6/|R62|<2.1 wherein f6Denotes a focal length, R, of the sixth lens61Representing the object-side surface of the sixth lensRadius of curvature, R62Represents a radius of curvature of the image-side surface of the sixth lens element.
6. The optical imaging lens according to claim 1, characterized in that the following conditional expression is further satisfied: 1.6 < | f2/| < 3.3, where f2Representing the focal length of the second lens.
7. The optical imaging lens of claim 1, further satisfying the following conditional expression 0.35 < f/∑ CT ≦ 1.2, where ∑ CT represents a sum of thicknesses of the respective lenses of the first lens to the seventh lens on the optical axis.
8. The optical imaging lens according to claim 1, characterized in that the following conditional expression is further satisfied: ET 0.8 <7/CT7Less than or equal to 2.2, wherein ET7Representing the edge thickness, CT, of the seventh lens7The thickness of the seventh lens on the optical axis is indicated.
9. The optical imaging lens of claim 1, further satisfying the condition 0.7 ≦ L CT15/LCT47Less than or equal to 1.7, wherein L CT15Representing the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the fifth lens, L CT47And the distance from the object side surface of the fourth lens to the image side surface of the seventh lens on the optical axis is represented.
10. The optical imaging lens according to claim 1, characterized in that the following conditional expression is further satisfied: 1.1 < Fno < 1.65, where Fno represents the aperture value of the optical imaging lens.
11. An electronic apparatus characterized by comprising an image pickup device including an electron-sensitive element provided to an imaging surface of an optical imaging lens according to any one of claims 1 to 10 and the optical imaging lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010396977.5A CN111413783A (en) | 2020-05-12 | 2020-05-12 | Optical imaging lens and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010396977.5A CN111413783A (en) | 2020-05-12 | 2020-05-12 | Optical imaging lens and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111413783A true CN111413783A (en) | 2020-07-14 |
Family
ID=71492297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010396977.5A Pending CN111413783A (en) | 2020-05-12 | 2020-05-12 | Optical imaging lens and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111413783A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022016456A1 (en) * | 2020-07-23 | 2022-01-27 | 欧菲光集团股份有限公司 | Optical system, image capturing module, and electronic device |
| WO2022032426A1 (en) * | 2020-08-10 | 2022-02-17 | 欧菲光集团股份有限公司 | Optical system, camera module, and electronic device |
| CN116626864A (en) * | 2023-07-24 | 2023-08-22 | 江西联益光学有限公司 | Optical lens |
-
2020
- 2020-05-12 CN CN202010396977.5A patent/CN111413783A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022016456A1 (en) * | 2020-07-23 | 2022-01-27 | 欧菲光集团股份有限公司 | Optical system, image capturing module, and electronic device |
| WO2022032426A1 (en) * | 2020-08-10 | 2022-02-17 | 欧菲光集团股份有限公司 | Optical system, camera module, and electronic device |
| CN116626864A (en) * | 2023-07-24 | 2023-08-22 | 江西联益光学有限公司 | Optical lens |
| CN116626864B (en) * | 2023-07-24 | 2024-04-02 | 江西联益光学有限公司 | Optical lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109765679B (en) | Optical imaging lens and electronic device | |
| CN109061838B (en) | Optical imaging lens and electronic equipment | |
| US8379325B2 (en) | Photographing optical lens assembly | |
| CN109270666B (en) | Optical imaging lens and electronic equipment | |
| CN109375351B (en) | Camera lens group and electronic equipment | |
| CN108802962B (en) | Wide-angle imaging lens group | |
| CN110187483B (en) | Wide-angle lens and electronic equipment | |
| CN109765678B (en) | Camera lens and electronic equipment | |
| CN109100855B (en) | Optical imaging lens group and electronic equipment | |
| CN110187473B (en) | Five-piece type wide-angle lens and electronic equipment | |
| CN108802969B (en) | Optical imaging lens group | |
| CN110488469B (en) | Optical lens and electronic equipment | |
| CN109270665B (en) | Optical imaging lens and electronic device | |
| CN111413783A (en) | Optical imaging lens and electronic device | |
| US20130155528A1 (en) | Optical lens system for image taking | |
| CN113391430A (en) | Optical system, lens module and electronic equipment | |
| CN109557640B (en) | Imaging lens and electronic equipment | |
| CN213986983U (en) | Optical imaging lens, camera module and electronic equipment | |
| CN116027527B (en) | Optical lens, camera module and electronic equipment | |
| CN109445071B (en) | Optical imaging system and electronic equipment | |
| CN110058381B (en) | Optical lens and electronic device | |
| CN109270667B (en) | Optical imaging system and electronic device | |
| CN110018555B (en) | Optical imaging system and camera device | |
| CN212160213U (en) | Optical imaging lens and electronic device | |
| CN108508580B (en) | Optical imaging system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |