CN106154507B - Imaging lens group, image-taking device and electronic device - Google Patents
Imaging lens group, image-taking device and electronic device Download PDFInfo
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- CN106154507B CN106154507B CN201510145417.1A CN201510145417A CN106154507B CN 106154507 B CN106154507 B CN 106154507B CN 201510145417 A CN201510145417 A CN 201510145417A CN 106154507 B CN106154507 B CN 106154507B
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Abstract
A kind of imaging lens group, image-taking device and electronic device, the imaging lens group include sequentially the first lens, the second lens, the third lens and the 4th lens by object side to image side.It is convex surface that first lens, which have positive refracting power, the paraxial place in object side surface,.It is concave surface that second lens, which have negative refracting power, the paraxial place in object side surface,.The third lens have positive refracting power, and object side surface and image side surface are all aspherical.4th lens have refracting power, and object side surface and image side surface are all aspherical.When meeting specified conditions, image pickup scope can be effectively inhibited, the image quality of local image is made to have higher resolution.The invention also discloses a kind of image-taking device and electronic devices.
Description
Technical field
The present invention relates to a kind of imaging lens group and image-taking device, the miniaturization of especially a kind of application on the electronic device
Imaging lens group and image-taking device.
Background technology
In recent years, with the rise of the electronic product with camera function, the demand of optical system increasingly improves.General light
The photosensitive element of system is nothing more than being photosensitive coupling element (Charge Coupled Device, CCD) or complementary aoxidize
Metal semiconductor element (Complementary Metal-Oxide Semiconductor Sensor, CMOS sensor) two
Kind, and progressing greatly with semiconductor process technique so that the Pixel Dimensions of photosensitive element reduce, and optical system is gradually toward high pixel
Field is developed, therefore the requirement to image quality also increasingly increases.
The camera lens that portable electronic devices are configured on the market at present pursues nearly object distance and wide angle shot effect more, but such
The optical design of camera lens but cannot be satisfied the demand of the subtle image in shooting distant place.And the light of traditional vista shot (telephoto)
System mostly uses multiple-piece construction and carries spherical glass lens, and such configuration not only causes camera lens volume excessive without portable
Band, meanwhile, the excessively high stepping back for also making consumer's prestige of production unit cost, therefore the optical system of the prior art cannot be satisfied current one
As consumer pursue it is convenient with multi-functional photography demand.
Invention content
Technical problem to be solved by the invention is to provide a kind of imaging lens group, image-taking device and electronic device, imagings
Lens group is configured with four lens with refracting power, and the first lens design has positive refracting power, and its object side surface is convex surface,
Therefore the volume of imaging lens group can be effectively controlled, promote the convenience of carrying.In addition, the second lens object side table of imaging lens group
Face is designed as concave surface, can aberration caused by the first lens of active balance.
To achieve the goals above, the present invention provides a kind of imaging lens groups, include sequentially first by object side to image side
Lens, the second lens, the third lens and the 4th lens, it is convex surface that the first lens, which have positive refracting power, the paraxial place in object side surface,.
It is concave surface that second lens, which have negative refracting power, the paraxial place in object side surface,.The third lens have positive refracting power, object side surface and
Image side surface is all aspherical.4th lens have refracting power, and object side surface and image side surface are all aspherical.Imaging lens group is also
Including aperture, and the lens without tool refracting power between aperture and the first lens.The lens with refracting power are four in imaging lens group
Piece.The radius of curvature of second lens object side surface is R3, and the radius of curvature on the second lens image side surface is R4, imaging lens group
Focal length is f, and the maximum image height of imaging lens group is ImgH, and the first lens with the second lens are T12 at a distance from optical axis, second
Lens and the third lens are T23 at a distance from optical axis, and the second lens are CT2 in the thickness on optical axis, meet following condition：
(R3+R4)/(R3-R4)<0.0；
2.4<f/ImgH<6.5；
-4.0<R3/T23<0.0；And
0.3<T12/CT2<5.0。
In order to which above-mentioned purpose is better achieved, the present invention also provides a kind of imaging lens groups, sequentially by object side to image side
Including the first lens, the second lens, the third lens and the 4th lens.First lens have positive refracting power, object side surface paraxial
Place is convex surface.It is concave surface that second lens, which have negative refracting power, the paraxial place in object side surface,.The third lens have positive refracting power,
Object side surface and image side surface are all aspherical.4th lens have negative refracting power, and object side surface and image side surface are all aspherical.
Imaging lens group also includes aperture, and without the lens for having refracting power between aperture and the first lens.Has refracting power in imaging lens group
Lens be four, and appoint two adjacent lens with refracting power between with airspace.The song of first lens object side surface
Rate radius is R1, and the radius of curvature on the first lens image side surface is R2, and the radius of curvature of the second lens object side surface is R3, the
The radius of curvature of two lens image sides surface is R4, and the focal length of imaging lens group is f, and the maximum image height of imaging lens group is ImgH,
First lens are CT1 in the thickness on optical axis, meet following condition：
(R3+R4)/(R3-R4)<0.0；
2.4<f/ImgH<6.5；
-0.50<R1/R2<0.50；And
3.0<(f/R1)-(f/R2)+((f*CT1)/(R1*R2))<7.5。
In order to which above-mentioned purpose is better achieved, the present invention also provides a kind of image-taking devices, including above-mentioned imaging lens
Group and electronics photosensitive element.
In order to which above-mentioned purpose is better achieved, the present invention also provides a kind of electronic devices, including above-mentioned image-taking device.
The technical effects of the invention are that：
Imaging lens group, image-taking device and the electronic device of the present invention, imaging lens group have refracting power configured with four
Lens, the first lens design has positive refracting power, and its object side surface is convex surface, therefore can effectively control the body of imaging lens group
Product, promotes the convenience of carrying.In addition, the second lens object side surface of imaging lens group is designed as concave surface, it can active balance
Aberration caused by one lens.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Description of the drawings
Fig. 1 is a kind of schematic diagram of image-taking device of first embodiment of the invention；
Fig. 2A -2C are sequentially spherical aberration, astigmatism and the distortion curve graph of first embodiment from left to right；
Fig. 3 is a kind of schematic diagram of image-taking device of second embodiment of the invention；
Fig. 4 A-4C are sequentially spherical aberration, astigmatism and the distortion curve graph of second embodiment from left to right；
Fig. 5 is a kind of schematic diagram of image-taking device of third embodiment of the invention；
Fig. 6 A-6C are sequentially spherical aberration, astigmatism and the distortion curve graph of 3rd embodiment from left to right；
Fig. 7 is a kind of schematic diagram of image-taking device of fourth embodiment of the invention；
Fig. 8 A-8C are sequentially spherical aberration, astigmatism and the distortion curve graph of fourth embodiment from left to right；
Fig. 9 is a kind of schematic diagram of image-taking device of fifth embodiment of the invention；
Figure 10 A-10C are sequentially spherical aberration, astigmatism and the distortion curve graph of the 5th embodiment from left to right；
Figure 11 is a kind of schematic diagram of image-taking device of sixth embodiment of the invention；
Figure 12 A-12C are sequentially spherical aberration, astigmatism and the distortion curve graph of sixth embodiment from left to right；
Figure 13 is a kind of schematic diagram of image-taking device of seventh embodiment of the invention；
Figure 14 A-14C are sequentially spherical aberration, astigmatism and the distortion curve graph of the 7th embodiment from left to right；
Figure 15 is a kind of schematic diagram of image-taking device of eighth embodiment of the invention；
Figure 16 A-16C are sequentially spherical aberration, astigmatism and the distortion curve graph of the 8th embodiment from left to right；
Figure 17 is a kind of schematic diagram of image-taking device of ninth embodiment of the invention；
Figure 18 A-18C are sequentially spherical aberration, astigmatism and the distortion curve graph of the 9th embodiment from left to right；
Figure 19 is a kind of schematic diagram of image-taking device of tenth embodiment of the invention；
Figure 20 is a kind of schematic diagram of image-taking device of eleventh embodiment of the invention；
Figure 21 is a kind of schematic diagram of electronic device of twelveth embodiment of the invention；
Figure 22 is a kind of schematic diagram of electronic device of thriteenth embodiment of the invention；
Figure 23 is a kind of schematic diagram of electronic device of fourteenth embodiment of the invention.
Wherein, reference numeral
Aperture 100,200,300,400,500,600,700,800,900
First lens 110,210,310,410,510,610,710,810,910
Object side surface 111,211,311,411,511,611,711,811,911
Image side surface 112,212,312,412,512,612,712,812,912
Second lens 120,220,320,420,520,620,720,820,920
Object side surface 121,221,321,421,521,621,721,821,921
Image side surface 122,222,322,422,522,622,722,822,922
The third lens 130,230,330,430,530,630,730,830,930
Object side surface 131,231,331,431,531,631,731,831,931
Image side surface 132,232,332,432,532,632,732,832,932
4th lens 140,240,340,440,540,640,740,840,940
Object side surface 141,241,341,441,541,641,741,841,941
Image side surface 142,242,342,442,542,642,742,842,942
Infrared ray filters out optical filter 150,250,350,450,550,650,750,850,950
Imaging surface 160,260,360,460,560,660,760,860,960
Electronics photosensitive element 170,270,370,470,570,670,770,870,970
20 objects
21 prisms
30,32,34 electronic device
31,33,35 image-taking device
The first lens of CT1 are in the thickness on optical axis
The second lens of CT2 are in the thickness on optical axis
CT3 the third lens are in the thickness on optical axis
The entrance pupil diameter of EPD imaging lens groups
Fno f-numbers
The focal length of f imaging lens groups
The focal length of the first lens of f1
The focal length of the second lens of f2
The focal length of f3 the third lens
The focal length of the 4th lens of f4
The half at HFOV imaging lens group maximums visual angle
The maximum image height of ImgH imaging lens groups
The first lens of Nmax, the second lens, the third lens and the maximum in the refractive index of the 4th lens
The radius of curvature of R1 the first lens objects side surface
The radius of curvature on the first lens image sides R2 surface
The radius of curvature of R3 the second lens objects side surface
The radius of curvature on the second lens image sides R4 surface
SD apertures are to the 4th lens image side surface in the distance on optical axis
The the first lens object side surfaces TD to the 4th lens image side surface is in the distance on optical axis
The the first lens object side surfaces TL are to imaging surface in the distance on optical axis
The first lens of T12 and the second lens are in the spacing distance on optical axis
The second lens of T23 are with the third lens in the spacing distance on optical axis
T34 the third lens are with the 4th lens in the spacing distance on optical axis
The abbe number of the second lens of V2
The abbe number of V3 the third lens
The effective radius of Y11 the first lens objects side surface
The effective radius on the 4th lens image side surfaces Y42
Specific implementation mode
The structural principle and operation principle of the present invention are described in detail below in conjunction with the accompanying drawings：
The present invention provides a kind of imaging lens group, sequentially saturating comprising the first lens, the second lens, third by object side to image side
Mirror, the 4th lens and aperture.It is four that imaging lens group, which has the lens of refracting power, and the second lens or the third lens or the 4th
An at least surface for lens can have an at least point of inflexion, with the aberration of modified off-axis.
It is convex surface that first lens, which have positive refracting power, the paraxial place in object side surface,.Thereby, imaging lens can be efficiently controlled
Head group volume, promotes the convenience of carrying.
It is concave surface that second lens, which have negative refracting power, the paraxial place in object side surface,.It thereby, can the first lens of active balance institute
The aberration of generation.The second off-axis place in lens object side surface can have an at least convex surface, and the second paraxial place in lens image side surface can
For convex surface, so as to update the system astigmatism.
The third lens have positive refracting power, and the paraxial place in object side surface can be convex surface or concave surface, to coordinate whole optics
System configuration, further update the system aberration, and its object side surface and image side surface are all aspherical.
4th lens can have negative refracting power, and the paraxial place in object side surface can be concave surface or convex surface.The image side of 4th lens
The paraxial place in surface can be concave surface, and place has an at least convex surface, object side surface and image side surface all aspheric off axis on image side surface
Face.Thereby, can be conducive to correct aberration.
In the imaging lens group of the present invention, in the first lens to the 4th lens, in optical axis between two adjacent lens
On largest interval distance can between the second lens and the third lens, or can between the third lens in the 4th lens it
Between.
The imaging lens group of the present invention is separately provided with an aperture, and the lens without tool refracting power between aperture and the first lens；
The setting of aperture can provide optical system enough incident lights, to promote image quality.
In the imaging lens group of the present invention, with airspace between the wantonly two adjacent lens with refracting power；In other words,
First lens to the 4th lens are four independent and unbonded lens.Since the more non-adhering lens of the technique of cemented lens are multiple
It is miscellaneous, the curved surface of high accuracy need to be especially possessed in the adhesive surface of two lens, so as to reach two lens bonding when high adaptation, and
In adhesion process, it is also possible to cause adaptation bad because of deviation, influence optical imagery quality.Therefore, imaging lens of the present invention
In group, the problem that there is airspace, cemented lens can be excluded between the lens of wantonly two adjacent tool refracting power.
The radius of curvature of second lens object side surface is R3, and the radius of curvature on the second lens image side surface is R4, is met
Following condition：(R3+R4)/(R3-R4)<0.0.Thereby, it is excessive to can avoid the second lens image side surface curvature, sensitivity is caused to spend
Height, and make that qualification rate is caused to decline.
The focal length of imaging lens group is f, and the maximum image height of imaging lens group is ImgH, meets following condition：2.4<f/
ImgH<6.5.Thereby, image pickup scope can be effectively inhibited, the image quality of local image is made to have higher resolution.Preferably
Ground meets following condition：2.7<f/ImgH<5.0.
The radius of curvature of second lens object side surface is R3, and the second lens and the third lens are T23 at a distance from optical axis,
It meets following condition：-4.0<R3/T23<0.0.Thereby, it can be ensured that the principal point proximity object side of the second lens, while meeting the
Light path reconciliation function between two lens and the third lens.
First lens and the second lens are T12 at a distance from optical axis, and the second lens are CT2 in the thickness on optical axis,
Meet following condition：0.3<T12/CT2<5.0.Thereby, it can be ensured that the first lens and the second lens have enough spaces in favor of
The assembling of imaging lens group.Preferably, following condition can be met：0.4< T12/CT2<3.0.
The radius of curvature of first lens object side surface is R1, and the radius of curvature on the first lens image side surface is R2, is met
Following condition：-0.50<R1/R2<0.50.Thereby, so that the principal point of the first lens is moved toward object side, contribute to contracting end imaging lens
The back focal length degree of head group, reduces the entire length of imaging lens group.Preferably, meeting following condition：-0.30<R1/R2<0.30.
The focal length of imaging lens group is f, and the radius of curvature of the first lens object side surface is R1, the first lens image side surface
Radius of curvature is R2, and the first lens are CT1 in the thickness on optical axis, meet following condition： 3.0<(f/R1)-(f/R2)+
((f*CT1)/(R1*R2))<7.5.Thereby, the aggregate capabilities that can be conducive to total system concentrate on the object side of imaging lens group,
And good function of telescope is provided, make the demand for being more suitable for reaching vista shot (Telephoto).
The radius of curvature of second lens object side surface is R3, and the radius of curvature on the second lens image side surface is R4, is met
Following condition：|R3|<| R4 |, it is possible to provide good lens manufacturing.
First lens to the 4th lens respectively have a refractive index, in these refractive index of the first lens to the 4th lens most
Big value is Nmax, meets following condition：1.50<Nmax<1.70.Thereby, imaging lens group refracting power can effectively be balanced
Configure and reduce the generation of aberration.
The focal length of imaging lens group is f, and the radius of curvature of the first lens object side surface is R1, meets following condition：3.3
<f/R1<8.5.Thereby, contribute to provide the first appropriate lens refracting power.
The focal length of imaging lens group is f, and the distance of the first lens object side surface to imaging surface is TL, meets following item
Part：0.95<f/TL<1.5.Thereby, the entire length for contributing to control imaging lens group makes its miniaturization of maintenance.
The focal length of imaging lens group is f, meets following condition：5.5mm<f<12.0mm.Thereby, imaging can effectively be controlled
The focal length of lens group.
The focal length of imaging lens group is f, and the focal length of the first lens is f1, and the focal length of the second lens is f2, the third lens
Focal length is f3, and the focal length of the 4th lens is f4, meets following condition：5.0< |f/f1|+|f/f2|+|f/f3|+|f/f4|.
Thereby, imaging lens group is contributed to provide sufficient resolving power.
First lens, the second lens, the third lens and the 4th lens are Σ CT, the first lens in the summation of thickness on optical axis
Object side surface to the 4th lens image side surface is TD in the distance on optical axis, meets following condition：ΣCT/TD<0.55.By
This, each lens configuration appropriate can effectively maintain the miniaturization of imaging lens group.
Aperture to the 4th lens image side surface in the distance on optical axis be SD, the first lens object side surface to the 4th lens picture
Side surface is TD in the distance on optical axis, meets following condition：0.65<SD/TD<1.0.Thereby, be conducive to balance imaging lens
Telecentricity (Telecentric) effect and field angle of head group.
The maximum image height of a diameter of EPD of maximum entrance pupil of imaging lens group, imaging lens group are ImgH, are met following
Condition：0.9<EPD/ImgH<2.0.Thereby, the receipts light quantity that image unit area can be increased, to promote image quality.
The half at the maximum visual angle of imaging lens group is HFOV, meets following condition：0.20< tan(2*HFOV)<
0.90.Thereby, it can be ensured that imaging lens group has enough visual fields.
The abbe number of second lens is V2, and the abbe number of the third lens is V3, meets following condition： 20<V2+
V3<60.Thereby, can balance system configuration, to help correct small angle aberration.
First lens object side surface is TL in the distance on optical axis to imaging surface, meets following condition：TL <10.0mm.
Thereby, the total length that can effectively control imaging lens group makes its miniaturization of maintenance.
First lens and the second lens are T12 at a distance from optical axis, the second lens and the third lens on optical axis away from
From for T23, the third lens at a distance from optical axis are T34 with the 4th lens, meet following condition：0<T12/(T23+T34)<
0.60.Thereby, the first lens can effectively be controlled with the second lens at a distance from optical axis, it is possible to provide shoot preferably imaging at a distance
Quality.
First lens are CT1 in the thickness on optical axis, and the second lens are CT2 in the thickness on optical axis, meet following item
Part：1.7<CT1/CT2<8.0.Thereby, the configuration of control system refracting power, and then update the system aberration be can help to.
The distance of first lens object side surface to imaging surface is TL, and the maximum image height of imaging lens group is ImgH, is met
Following condition：2.5<TL/ImgH<4.0.Thereby, it can maintain to minimize, to be equipped on frivolous miniaturized electronic device.
The effective radius of first lens object side surface is Y11, and the effective radius on the 4th lens image side surface is Y42, is expired
Foot row condition：0.7<Y11/Y42<1.8.Thereby, the angle that can effectively suppress light incidence, further promotes image quality.
Second lens and the third lens are T23 at a distance from optical axis, the third lens and the 4th lens on optical axis away from
From for T34, the third lens are CT3 in the distance on optical axis, meet following condition：2.50< (T23+T34)/CT3.Thereby,
The configuration of the third lens, further update the system spherical aberration can effectively be adjusted.
According to the above embodiment, specific embodiment set forth below simultaneously coordinates schema to be described in detail.
First embodiment
Fig. 1 and Fig. 2 is please referred to, wherein Fig. 1 is a kind of schematic diagram of image-taking device of first embodiment of the invention, Fig. 2A-
2C by a left side and the right side is sequentially the spherical aberration of first embodiment, astigmatism and distorts curve graph.By Fig. 1 it is found that the capture of first embodiment
Device includes imaging lens group (not another label) and electronics photosensitive element 170.Imaging lens group is sequentially wrapped by object side to image side
Optical filter is filtered out containing the first lens 110, aperture 100, the second lens 120, the third lens 130, the 4th lens 140, infrared ray
150 and imaging surface 160, electronics photosensitive element 170 be set to the imaging surface 160 of imaging lens group.Imaging lens group has flexion
The lens of power are four (110-140), and have airspace between the lens of two adjacent tool refracting powers.
First lens 110 have positive refracting power, and are plastic cement material, and 111 paraxial place of object side surface is convex surface, image side
112 paraxial place of surface is convex surface, and is all aspherical.
Second lens 120 have negative refracting power, and are plastic cement material, and 121 paraxial place of object side surface is concave surface, image side
122 paraxial place of surface is convex surface, and is all aspherical.The off-axis place of the object side surface 121 of second lens 120 has a convex surface.
The third lens 130 have positive refracting power, and are plastic cement material, and 131 paraxial place of object side surface is convex surface, image side
132 paraxial place of surface is convex surface, and is all aspherical.In the imaging lens group of first embodiment, between two adjacent lens
In the largest interval distance on optical axis between the second lens 120 and the third lens 130.
4th lens 140 have negative refracting power, and are plastic cement material, and 141 paraxial place of object side surface is concave surface, image side
142 paraxial place of surface is concave surface, and is all aspherical.Place is convex at least one off axis on the image side surface 142 of 4th lens 140
Face.
It is glass material that infrared ray, which filters out optical filter 150, is set between the 4th lens 140 and imaging surface 160 and not
Influence the focal length of imaging lens group.
The aspherical fitting equation of above-mentioned each lens indicates as follows：
；Wherein：
X：Apart from the point that optical axis is Y on aspherical, with the relative distance for being tangential on intersection point section on aspherical optical axis；
Y：The vertical range of point and optical axis in aspheric curve；
R：Radius of curvature；
k：Conical surface coefficient；And
Ai：I-th rank asphericity coefficient.
In the imaging lens group of first embodiment, the focal length of imaging lens group is f, the f-number (f- of imaging lens group
Number it is) Fno, the half (or being half angle of view) at imaging lens group maximum visual angle is HFOV, and numerical value is as follows：F=
7.31mm, Fno=2.70, HFOV=16.0 degree.
In the imaging lens group of first embodiment, 110 to the 4th lens 140 of the first lens respectively have a refractive index, first
Maximum value in these refractive index of 110 to the 4th lens 140 of lens is Nmax, meets following condition：Nmax=1.639.
In the imaging lens group of first embodiment, the abbe number of the second lens 120 is V2, the dispersion of the third lens 130
Coefficient is V3, meets following condition：V2+V3=47.0.
In the imaging lens group of first embodiment, the first lens 110 in the thickness on optical axis be CT1, the second lens 120 in
Thickness on optical axis is CT2, meets following condition：CT1/CT2=4.64.
In the imaging lens group of first embodiment, the first lens 110 are in the spacing distance on optical axis with the second lens 120
T12, the second lens 120 are CT2 in the thickness on optical axis, meet following condition：T12/CT2=1.77.
In the imaging lens group of first embodiment, the first lens 110 are in the spacing distance on optical axis with the second lens 120
T12, the second lens 120 and the third lens 130 are T23, the third lens 130 and the 4th lens 140 in the spacing distance on optical axis
It is T34 in the spacing distance on optical axis, meets following condition：T12/ (T23+T34)=0.21.
In the imaging lens group of first embodiment, the second lens 120 are in the spacing distance on optical axis with the third lens 130
T23, the third lens 130 and the 4th lens 140 are T34 in the spacing distance on optical axis, and the third lens 130 are in the thickness on optical axis
For CT3, meet following condition：(T23+T34)/CT3=2.93.
In the imaging lens group of first embodiment, the radius of curvature of the object side surface 111 of the first lens 110 is R1, first
The radius of curvature on the image side surface 112 of lens 110 is R2, meets following condition：R1/R2=- 0.22.
In the imaging lens group of first embodiment, the radius of curvature of 120 object side surface 121 of the second lens is R3, and second thoroughly
Mirror 120 is T23 in the spacing distance on optical axis with the third lens 130, meets following condition：R3/T23=-1.04.
In the imaging lens group of first embodiment, the focal length of imaging lens group is f, 110 object side surface 111 of the first lens
Radius of curvature is R1, meets following condition：F/R1=3.69.
In the imaging lens group of first embodiment, the radius of curvature of 120 object side surface 121 of the second lens is R3, and second thoroughly
The radius of curvature on 120 image side surface 122 of mirror is R4, meets following condition：(R3+R4)/(R3-R4)=- 1.10.
In the imaging lens group of first embodiment, the focal length of imaging lens group is f, and the focal length of the first lens 110 is f1, the
The focal length of two lens 120 is f2, and the focal length of the third lens 130 is f3, and the focal length of the 4th lens 140 is f4, meets following item
Part：| f/f1 |+| f/f2 |+| f/f3 |+| f/f4 |=7.29.
In the imaging lens group of first embodiment, the focal length of imaging lens group is f, the object side surface 111 of the first lens 110
Radius of curvature be R1, the radius of curvature on the image side surface 112 of the first lens 110 is R2, and the first lens 110 are in the thickness on optical axis
Degree is CT1, meets following condition：(f/R1)-(f/R2)+((f*CT1)/(R1*R2))=4.30.
In the imaging lens group of first embodiment, the first lens 110, the second lens 120, the third lens 130 and the 4th are thoroughly
Mirror 140 is Σ CT, the picture of 111 to the 4th lens 140 of object side surface of the first lens 110 respectively at the summation of thickness on optical axis
Side surface 142 is TD in the distance on optical axis, meets following condition：Σ CT/TD=0.48.
In the imaging lens group of first embodiment, the effective radius of the object side surface 111 of the first lens 110 is Y11, the
The effective radius on the image side surface 142 of four lens 140 is Y42, meets following condition：Y11/Y42=0.91.
In the imaging lens group of first embodiment, the half at the maximum visual angle of imaging lens group is HFOV, is met following
Condition：Tan (2*HFOV)=0.62.
In the imaging lens group of first embodiment, aperture 100 to 140 image side surface 142 of the 4th lens on optical axis away from
From for SD, the first lens 110 object side surface 111 to the 4th lens, 140 image side surface 142 is TD in the distance on optical axis, is expired
Foot row condition：SD/TD=0.74.
In the imaging lens group of first embodiment, a diameter of EPD of maximum entrance pupil of imaging lens group, imaging lens group
Maximum image height is ImgH, meets following condition：EPD/ImgH=1.23.
In the imaging lens group of first embodiment, the object side surfaces 111 of the first lens 110 is to imaging surface 160 on optical axis
Distance be TL, meet following condition：TL=7.00mm.
In the imaging lens group of first embodiment, the focal length of imaging lens group is f, 110 object side surface 111 of the first lens to
Imaging surface 160 is TL in the distance on optical axis, meets following condition：F/TL=1.05.
In the imaging lens group of first embodiment, the focal length of imaging lens group is f, and the maximum image height of imaging lens group is
ImgH meets following condition：F/ImgH=3.32.
In the imaging lens group of first embodiment, the object side surfaces 111 of the first lens 110 is to imaging surface 160 on optical axis
Distance be TL, meet following condition：TL/ImgH=3.17.
Coordinate again with reference to following table one and table two.
Table one is the detailed structured data of Fig. 1 first embodiments, and wherein the unit of radius of curvature, thickness and focal length is mm,
And surface 0-12 is sequentially indicated by the surface of object side to image side.Table two is the aspherical surface data in first embodiment, wherein k tables
Conical surface coefficient in aspheric curve equation, A4-A14 then indicate each surface 4-14 rank asphericity coefficients.In addition, following
Embodiment table is schematic diagram and the aberration curve figure of corresponding each embodiment, in table the definition of data all with first embodiment
The definition of table one and table two is identical, repeats no more.
Second embodiment
Fig. 3 and Fig. 4 is please referred to, wherein Fig. 3 is a kind of schematic diagram of image-taking device of second embodiment of the invention, Fig. 4 A-
4C is sequentially spherical aberration, astigmatism and the distortion curve graph of second embodiment from left to right.By Fig. 3 it is found that the capture of second embodiment
Device includes imaging lens group (not another label) and electronics photosensitive element 270.Imaging lens group includes sequentially by object side to image side
First lens 210, aperture 200, the second lens 220, the third lens 230, the 4th lens 240, infrared ray filter out optical filter 250 and
Imaging surface 260, electronics photosensitive element 270 are set to the imaging surface 260 of imaging lens group；Wherein, have in imaging lens group and bend
The lens for rolling over power are four (210-240), and have airspace between the lens of two adjacent tool refracting powers.
First lens 210 have positive refracting power, and are plastic cement material, and 211 paraxial place of object side surface is convex surface, image side
212 paraxial place of surface is convex surface, and is all aspherical.
Second lens 220 have negative refracting power, and are plastic cement material, and 221 paraxial place of object side surface is concave surface, image side
222 paraxial place of surface is convex surface, and is all aspherical.The off-axis place of second lens, 220 object side surface 221 is convex at least one
Face.
The third lens 230 have positive refracting power, and are plastic cement material, and 231 paraxial place of object side surface is concave surface, image side
232 paraxial place of surface is convex surface, and is all aspherical.In the imaging lens group of second embodiment, between two adjacent lens
In the largest interval distance on optical axis between the second lens 220 and the third lens 230.
4th lens 240 have negative refracting power, and are plastic cement material, and 241 paraxial place of object side surface is convex surface, image side
242 paraxial place of surface is concave surface, and is all aspherical.Place is convex at least one off axis on the image side surface 242 of 4th lens 240
Face.
It is glass material that infrared ray, which filters out optical filter 250, is set between the 4th lens 240 and imaging surface 260 and not
Influence the focal length of imaging lens group.
Cooperation is with reference to following table three and table four.
In second embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter
Definition is all identical with the first embodiment, and not in this to go forth.
Cooperation table three and table four can extrapolate following data：
3rd embodiment
Fig. 5 and Fig. 6 is please referred to, wherein Fig. 5 is a kind of schematic diagram of image-taking device of third embodiment of the invention, Fig. 6 A-
6C is sequentially spherical aberration, astigmatism and the distortion curve graph of 3rd embodiment from left to right.By Fig. 5 it is found that the capture of 3rd embodiment
Device includes imaging lens group (not another label) and electronics photosensitive element 370.Imaging lens group includes sequentially by object side to image side
First lens 310, aperture 300, the second lens 320, the third lens 330, the 4th lens 340, infrared ray filter out optical filter 350 and
Imaging surface 360, electronics photosensitive element 370 are set to imaging surface 360；Wherein, the lens with refracting power are in imaging lens group
Four (310-340), and there is airspace between the lens of two adjacent tool refracting powers.
First lens 310 have positive refracting power, and are plastic cement material, and 311 paraxial place of object side surface is convex surface, image side
312 paraxial place of surface is convex surface, and is all aspherical.
Second lens 320 have negative refracting power, and are plastic cement material, and 321 paraxial place of object side surface is concave surface, image side
322 paraxial place of surface is convex surface, and is all aspherical.The 321 paraxial place of object side surface of second lens 320 is convex at least one
Face.
The third lens 330 have positive refracting power, and are plastic cement material, and 331 paraxial place of object side surface is convex surface, image side
332 paraxial place of surface is concave surface, and is all aspherical.
4th lens 340 have negative refracting power, and are plastic cement material, and 341 paraxial place of object side surface is convex surface, image side
342 paraxial place of surface is concave surface, and is all aspherical.Place is convex at least one off axis on the image side surface 342 of 4th lens 340
Face, and in the imaging lens group of 3rd embodiment is appointed between two adjacent lens in the largest interval distance on optical axis between the
Between three lens 330 and the 4th lens 340.
It is glass material that infrared ray, which filters out optical filter 350, and is set between the 4th lens 340 and imaging surface 360 and not
Influence the focal length of imaging lens group.
Cooperation is with reference to following table five and table six.
In 3rd embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter
Definition is all identical with the first embodiment, and not in this to go forth.
Cooperation table five and table six can extrapolate following data：
Fourth embodiment
Fig. 7 and Fig. 8 is please referred to, wherein Fig. 7 is a kind of schematic diagram of image-taking device of fourth embodiment of the invention, Fig. 8 A-
8C is sequentially spherical aberration, astigmatism and the distortion curve graph of fourth embodiment from left to right.By Fig. 7 it is found that the capture of fourth embodiment
Device includes imaging lens group (not another label) and electronics photosensitive element 470.Imaging lens group includes sequentially by object side to image side
First lens 410, aperture 400, the second lens 420, the third lens 430, the 4th lens 440, infrared ray filter out optical filter 450 and
Imaging surface 460, electronics photosensitive element 470 are set to the imaging surface 460 of imaging lens group；Wherein, have in imaging lens group and bend
The lens for rolling over power are four (410-440), and have airspace between the lens of two adjacent tool refracting powers.
First lens 410 have positive refracting power, and are plastic cement material, and place is convex surface, image side off axis for object side surface 411
Place is convex surface off axis on surface 412, and is all aspherical.
Second lens 420 have negative refracting power, and are plastic cement material, and place is concave surface, image side off axis for object side surface 421
Place is concave surface off axis on surface 422, and is all aspherical.Place is convex at least one off axis for the object side surface 422 of second lens 420
Face.
The third lens 430 have positive refracting power, and are plastic cement material, and 431 paraxial place of object side surface is concave surface, image side
432 paraxial place of surface is convex surface, and is all aspherical.In the imaging lens group of fourth embodiment, between two adjacent lens
In the largest interval distance on optical axis between the second lens 420 and the third lens 430.
4th lens 440 have negative refracting power, and are plastic cement material, and 441 paraxial place of object side surface is concave surface, image side
442 paraxial place of surface is concave surface, and is all aspherical.Place is convex at least one off axis on the image side surface 442 of 4th lens 440
Face.
It is glass material that infrared ray, which filters out optical filter 450, is set between the 4th lens 440 and imaging surface 460 and not
Influence the focal length of imaging lens group.
Cooperation is with reference to following table seven and table eight.
In fourth embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter
Definition is all identical with the first embodiment, and not in this to go forth.
Cooperation table seven and table eight can extrapolate following data：
5th embodiment
Fig. 9 and Figure 10 is please referred to, wherein Fig. 9 is a kind of schematic diagram of image-taking device of fifth embodiment of the invention, figure
10A-10C is sequentially spherical aberration, astigmatism and the distortion curve graph of the 5th embodiment from left to right.As shown in Figure 9, the 5th embodiment
Image-taking device includes imaging lens group (not another label) and electronics photosensitive element 570.Imaging lens group by object side to image side sequentially
Including aperture 500, the first lens 510, the second lens 520, the third lens 530, the 4th lens 540, infrared ray filter out optical filter
550 and imaging surface 560, electronics photosensitive element 570 be set to the imaging surface 560 of imaging lens group；Wherein, imaging lens group has
The lens of refracting power are four (510-540), and have airspace between the lens of two adjacent tool refracting powers.
First lens 510 have positive refracting power, and are plastic cement material, and 511 paraxial place of object side surface is convex surface, image side
512 paraxial place of surface is convex surface, and is all aspherical.
Second lens 520 have negative refracting power, and are plastic cement material, and 521 paraxial place of object side surface is concave surface, image side
522 paraxial place of surface is concave surface, and is all aspherical.Place is convex at least one off axis for the object side surface 521 of second lens 520
Face.
The third lens 530 have positive refracting power, and are plastic cement material, and 531 paraxial place of object side surface is concave surface, image side
532 paraxial place of surface is convex surface, and is all aspherical.In the imaging lens group of the 5th embodiment, between two adjacent lens
In the largest interval distance on optical axis between the second lens 520 and the third lens 530.
4th lens 540 have negative refracting power, and are plastic cement material, and 541 paraxial place of object side surface is concave surface, image side
542 paraxial place of surface is concave surface, and is all aspherical.The off-axis place of 4th lens 540 has an at least convex surface.
It is glass material that infrared ray, which filters out optical filter 550, is set between the 4th lens 540 and imaging surface 560 and not
Influence the focal length of imaging lens group.
Cooperation is with reference to following table nine and table ten.
In 5th embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter
Definition is all identical with the first embodiment, and not in this to go forth.
Cooperation table nine and table ten can extrapolate following data：
Sixth embodiment
Figure 11 and Figure 12 is please referred to, wherein Figure 11 is the schematic diagram of the image-taking device of sixth embodiment of the invention, Figure 12 A-
12C is sequentially spherical aberration, aberration and the distortion curve graph of sixth embodiment from left to right.As shown in Figure 11, sixth embodiment takes
As device includes imaging lens group (not another label) and electronics photosensitive element 670.Imaging lens group is sequentially wrapped by object side to image side
Optical filter is filtered out containing aperture 600, the first lens 610, the second lens 620, the third lens 630, the 4th lens 640, infrared ray
650 and imaging surface 660, electronics photosensitive element 670 be set to the imaging surface 660 of imaging lens group；Wherein, have in imaging lens group
It is four (610-640) to have the lens of refracting power, and has airspace between the lens of two adjacent tool refracting powers.
First lens 610 have positive refracting power, and are plastic cement material, and 611 paraxial place of object side surface is convex surface, image side
612 paraxial place of surface is convex surface, and is all aspherical.
Second lens 620 have negative refracting power, and are plastic cement material, and 621 paraxial place of object side surface is concave surface, image side
622 paraxial place of surface is concave surface, and is all aspherical.Place is convex at least one off axis for the object side surface 621 of second lens 620
Face.
The third lens 630 have positive refracting power, and are plastic cement material, and 631 paraxial place of object side surface is convex surface, image side
632 paraxial place of surface is convex surface, and is all aspherical.In the imaging lens group of sixth embodiment, between two adjacent lens
In the largest interval distance on optical axis between the second lens 620 and the third lens 630.
4th lens 640 have negative refracting power, and are plastic cement material, and 641 paraxial place of object side surface is concave surface, image side
642 paraxial place of surface is convex surface, and is all aspherical.
It is glass material that infrared ray, which filters out optical filter 650, is set between the 4th lens 640 and imaging surface 660 and not
Influence the focal length of imaging lens group.
Cooperation is with reference to following table 11 and table 12.
In sixth embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter
Definition is all identical with the first embodiment, and not in this to go forth.
Cooperation table 11 and table 12 can extrapolate following data：
7th embodiment
Figure 13 and Figure 14 is please referred to, wherein Figure 13 is a kind of schematic diagram of image-taking device of seventh embodiment of the invention, figure
14A-14C is sequentially spherical aberration, astigmatism and the distortion curve graph of the 7th embodiment from left to right.As shown in Figure 13, the 7th embodiment
Image-taking device include imaging lens group (not another label) and electronics photosensitive element 770.Imaging lens group by object side to image side according to
Sequence filters out optical filtering comprising the first lens 710, aperture 700, the second lens 720, the third lens 730, the 4th lens 740, infrared ray
Piece 750 and imaging surface 760, electronics photosensitive element 770 are set to imaging surface 760；Wherein, there is refracting power in imaging lens group
Lens are four (710-740), and have airspace between the lens of two adjacent tool refracting powers.
First lens 710 have positive refracting power, and are plastic cement material, and 711 paraxial place of object side surface is convex surface, image side
712 paraxial place of surface is concave surface, and is all aspherical.
Second lens 720 have negative refracting power, and are plastic cement material, and 721 paraxial place of object side surface is concave surface, image side
722 paraxial place of surface is convex surface, and is all aspherical.Place has an at least convex surface off axis for the object side surface of second lens 720.
The third lens 730 have positive refracting power, and are plastic cement material, and 731 paraxial place of object side surface is concave surface, image side
732 paraxial place of surface is convex surface, and is all aspherical.
4th lens 740 have negative refracting power, and are plastic cement material, and 741 paraxial place of object side surface is concave surface, image side
742 paraxial place of surface is concave surface, and is all aspherical.Place is convex at least one off axis on the image side surface 742 of 4th lens 740
Face.In the imaging lens group of the 7th embodiment, in the largest interval distance on optical axis between third between two adjacent lens
Between lens 730 and the 4th lens 740.
It is glass material that infrared ray, which filters out optical filter 750, is set between the 4th lens 740 and imaging surface 760 and not
Influence the focal length of imaging lens group.
Cooperation is with reference to following table 13 and table 14.
In 7th embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter
Definition is all identical with the first embodiment, and not in this to go forth.
Cooperation table 13 and table 14 can extrapolate following data：
8th embodiment
Figure 15 and Figure 16 is please referred to, wherein Figure 15 is a kind of schematic diagram of image-taking device of eighth embodiment of the invention, figure
16A-16C is sequentially spherical aberration, aberration or the distortion curve graph of the 8th embodiment from left to right.As shown in Figure 15, the 8th embodiment
Image-taking device include imaging lens group (not another label) and electronics photosensitive element 870.Imaging lens group by object side to measure according to
Sequence filters out optical filtering comprising aperture 800, the first lens 810, the second lens 820, the third lens 830, the 4th lens 840, infrared ray
Piece 850 and imaging surface 860, electronics photosensitive element 870 are set to the imaging surface 860 of imaging lens group；Wherein, in imaging lens group
Lens with refracting power are four (810-840), and have airspace between the lens of two adjacent tool refracting powers.
First lens 810 have positive refracting power, and are plastic cement material, and 811 paraxial place of object side surface is convex surface, image side
812 paraxial place of surface is convex surface, and is all aspherical.
Second lens 820 have negative refracting power, and are plastic cement material, and 821 paraxial place of object side surface is concave surface, image side
822 paraxial place of surface is convex surface, and is all aspherical.Place is convex at least one off axis for the object side surface 821 of second lens 820
Face.
The third lens 830 have positive refracting power, and are plastic cement material, and 831 paraxial place of object side surface is convex surface, image side
832 paraxial place of surface is convex surface, and is all aspherical.In the imaging lens group of the 8th embodiment, between two adjacent lens
In the largest interval distance on optical axis between the second lens 820 and the third lens 830.
4th lens 840 have negative refracting power, and are plastic cement material, and 841 paraxial place of object side surface is convex surface, image side
842 paraxial place of surface is concave surface, and is all aspherical.Place has a convex surface off axis on the image side surface of 4th lens 840.
It is glass material that infrared ray, which filters out optical filter 850, is set between the 4th lens 840 and imaging surface 860 and not
Influence the focal length of imaging lens group.
Coordinate again with reference to following table 15 and table 16.
In 8th embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter
Definition is all identical with the first embodiment, and not in this to go forth.
Cooperation table 15 and table 16 can extrapolate following data：
9th embodiment
Figure 17 and Figure 18 is please referred to, wherein Figure 17 is a kind of schematic diagram of image-taking device of ninth embodiment of the invention, figure
18A-18C by a left side and the right side is sequentially the spherical aberration of the 9th embodiment, aberration and distorts curve graph.As shown in Figure 17, the 9th embodiment
Image-taking device include imaging lens group (not another label) and electronics photosensitive element 970.Imaging lens group by object side to image side according to
Sequence filters out optical filtering comprising aperture 900, the first lens 910, the second lens 920, the third lens 930, the 4th lens 940, infrared ray
Piece 950 and imaging surface 960, electronics photosensitive element 970 are set to the imaging surface 960 of imaging lens group；Wherein, in imaging lens group
Lens with refracting power are four (910-940), and have airspace between the lens of two adjacent tool refracting powers.
First lens 910 have positive refracting power, and are plastic cement material, and 911 paraxial place of object side surface is convex surface, image side
912 paraxial place of surface is concave surface, and is all aspherical.
Second lens 920 have negative refracting power, and are plastic cement material, and 921 paraxial place of object side surface is concave surface, image side
922 paraxial place of surface is convex surface, and is all aspherical.Place has a convex surface off axis for the object side surface of second lens 920.
The third lens 930 have positive refracting power, and are plastic cement material, and 931 paraxial place of object side surface is convex surface, image side
932 paraxial place of surface is convex surface, and is all aspherical.In the imaging lens group of the 9th embodiment, between two adjacent lens
In the largest interval distance on optical axis between the second lens 920 and the third lens 930.
4th lens 940 have negative refracting power, and are plastic cement material, and 941 paraxial place of object side surface is concave surface, image side
942 paraxial place of surface is concave surface, and is all aspherical.Place has an at least convex surface off axis on the image side surface of 4th lens 940.
It is glass material that infrared ray, which filters out optical filter 950, is set between the 4th lens 940 and imaging surface 960 and not
Influence the focal length of the imaging lens group.
Coordinate again with reference to following table 17 and table 18.
In 9th embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter
Definition is all identical with the first embodiment, and not in this to go forth.
Cooperation table 17 and table 18 can extrapolate following data：
Tenth embodiment
Figure 19 is please referred to, is a kind of schematic diagram of image-taking device of tenth embodiment of the invention.The capture of tenth embodiment
Device includes imaging lens group (not another label) and electronics photosensitive element 170 according to the present invention.It should be particularly noted that,
In Figure 19, imaging lens group and electronics photosensitive element are with imaging lens group shown in first embodiment and electronics photosensitive element
As declared range, that is, the element numbers of imaging lens group shown in Figure 19 are identical to the imaging lens group of first embodiment；
So in actual implementation, imaging lens group and electronics photosensitive element can also be in second embodiment to the 9th embodiment it is any at
The imaging lens group and electronics photosensitive element of group.
Imaging lens group is set between object 20 and electronics photosensitive element 170, and electronics photosensitive element 170 is set to
The imaging surface 160 of imaging lens group.Imaging lens group to by the video imaging of object 20 in the electricity in imaging surface 160 is arranged
Sub- photosensitive element 170.
11st embodiment
Figure 20 is please referred to, is a kind of schematic diagram of image-taking device of eleventh embodiment of the invention.11st embodiment
Image-taking device includes imaging lens group (not another label), prism 21 and an electronics photosensitive element 170.It should be particularly noted that,
In Figure 20, imaging lens group and electronics photosensitive element are with imaging lens group shown in first embodiment and electronics photosensitive element
As declared range, that is, imaging lens group and the element numbers of electronics photosensitive element shown in Figure 20 are identical to first embodiment
Imaging lens group and electronics photosensitive element；So in actual implementation, imaging lens group and electronics photosensitive element can also be
Any groups of imaging lens group and electronics photosensitive element in two embodiments to the 9th embodiment.
Imaging lens group is set between object 20 and electronics photosensitive element 170, and electronics photosensitive element 170 is arranged
In the imaging surface 160 of imaging lens group, prism 21 is set between object 20 and imaging lens group.Imaging lens group is making
20 video imaging of object is in the electronics photosensitive element 170 positioned at imaging surface 160, and prism 21 is making the light path of image-taking device turn
To reduce image-taking device height, keeping space configuration more flexible, even more with being equipped on thinned electronic.
12nd embodiment
Figure 21 is please referred to, is a kind of schematic diagram of electronic device of twelveth embodiment of the invention.12nd embodiment
Electronic device 30 be a smart mobile phone, electronic device 30 include image-taking device 31, image-taking device 31 include according to the present invention at
As lens group (not shown) and electronics photosensitive element (not shown), wherein electronics photosensitive element be set to imaging lens group at
Image planes.
13rd embodiment
Figure 22 is please referred to, is a kind of schematic diagram of electronic device of thriteenth embodiment of the invention.13rd embodiment
Electronic device 32 be a tablet computer, electronic device 32 include image-taking device 33, image-taking device 33 include according to the present invention at
As lens group (not shown) and electronics photosensitive element (not shown), wherein electronics photosensitive element is set to the imaging of imaging lens group
Face.
14th embodiment
Figure 23 is please referred to, is a kind of schematic diagram of electronic device of fourteenth embodiment of the invention.14th embodiment
Electronic device 34 is a head-mounted display apparatus (Head-mounted display, HMD), and electronic device 34 includes image-taking device
35, image-taking device 35 includes the imaging lens group (not shown) and electronics photosensitive element (not shown) according to the present invention, sense electronics
Optical element is set to the imaging surface of imaging lens group.
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe
It knows those skilled in the art and makes various corresponding change and deformations, but these corresponding changes and change in accordance with the present invention
Shape should all belong to the protection domain of appended claims of the invention.
Claims (30)
1. a kind of imaging lens group, which is characterized in that include sequentially by object side to image side：
One first lens, it is convex surface to have positive refracting power, the paraxial place in object side surface；
One second lens, it is concave surface to have negative refracting power, the paraxial place in object side surface；
One the third lens have positive refracting power, and object side surface and image side surface are all aspherical；And
One the 4th lens have refracting power, and object side surface and image side surface are all aspherical；
Wherein, which further includes an aperture, without tool refracting power lens between the aperture and first lens；
Wherein, the lens of imaging lens group tool refracting power are four, and are had between two adjacent lens with refracting power
The radius of curvature of one airspace, the first lens object side surface is R1, and the radius of curvature on the first lens image side surface is R2,
The radius of curvature of the second lens object side surface is R3, and the radius of curvature on the second lens image side surface is R4, the imaging lens
The focal length of group is f, and the maximum image height of the imaging lens group is ImgH, and first lens are with second lens in the interval on optical axis
Distance is T12, which is T23 in the spacing distance on optical axis with the third lens, and first lens are on optical axis
Thickness is CT1, which is CT2 in the thickness on optical axis, meets following condition：
(R3+R4)/(R3-R4)<0.0；
2.4<f/ImgH<6.5；
-4.0<R3/T23<0.0；
0.3<T12/CT2<5.0；
-0.50<R1/R2<0.50；And
3.0<(f/R1)-(f/R2)+((f*CT1)/(R1*R2))<7.5。
2. imaging lens group as described in claim 1, which is characterized in that the 4th lens have negative refracting power, the third saturating
The paraxial place in mirror image side surface is convex surface.
3. imaging lens group as described in claim 1, which is characterized in that the 4th paraxial place in lens image side surface is concave surface,
And the 4th lens image side surface off axis place have an at least convex surface.
4. imaging lens group as described in claim 1, which is characterized in that the paraxial place in the third lens object side surface is convex surface.
5. imaging lens group as described in claim 1, which is characterized in that the 4th paraxial place in lens object side surface is concave surface.
6. imaging lens group as described in claim 1, which is characterized in that the paraxial place in the second lens image side surface is convex surface.
7. imaging lens group as described in claim 1, which is characterized in that the radius of curvature of the second lens object side surface is
R3, the radius of curvature on the second lens image side surface are R4, and first lens to the 4th lens respectively have a refractive index, this
Maximum value in these refractive index of one lens to the 4th lens is Nmax, meets following condition：
|R3|<|R4|；And
1.50<Nmax<1.70。
8. imaging lens group as described in claim 1, which is characterized in that the focal length of the imaging lens group is f, first lens
The radius of curvature of object side surface is R1, meets following condition：
3.3<f/R1<8.5。
9. imaging lens group as described in claim 1, which is characterized in that the focal length of the imaging lens group is f, first lens
Object side surface is TL in the distance on optical axis to an imaging surface, meets following condition：
0.95<f/TL<1.5。
10. imaging lens group as described in claim 1, which is characterized in that the focal length of the imaging lens group is f, under meeting
Row condition：
5.5mm<f<12.0mm。
11. imaging lens group as described in claim 1, which is characterized in that first lens to second lens are on optical axis
Spacing distance be T12, second lens in the thickness on optical axis be CT2, meet following condition：
0.4<T12/CT2<3.0。
12. imaging lens group as described in claim 1, which is characterized in that the focal length of the imaging lens group be f, this first thoroughly
The focal length of mirror is f1, and the focal length of second lens is f2, and the focal length of the third lens is f3, and the focal length of the 4th lens is f4,
It meets following condition：
5.0<|f/f1|+|f/f2|+|f/f3|+|f/f4|。
13. imaging lens group as described in claim 1, which is characterized in that place has extremely off axis for the second lens object side surface
A few convex surface, first lens, second lens, the third lens and the 4th lens are respectively at the summation of thickness on optical axis
Σ CT, the first lens object side surface to the 4th lens image side surface are TD in the distance on optical axis, meet following condition：
ΣCT/TD<0.55。
14. imaging lens group as described in claim 1, which is characterized in that second lens or the third lens or the 4th
It is in the distance on optical axis with an at least point of inflexion, the aperture to the 4th lens image side surface on an at least surface for lens
SD, the first lens object side surface to the 4th lens image side surface are TD in the distance on optical axis, meet following condition：
0.65<SD/TD<1.0。
15. imaging lens group as described in claim 1, which is characterized in that a diameter of EPD of entrance pupil of the imaging lens group,
The maximum image height of the imaging lens group is ImgH, meets following condition：
0.9<EPD/ImgH<2.0。
16. a kind of imaging lens group, which is characterized in that include sequentially by object side to image side：
One first lens, it is convex surface to have positive refracting power, the paraxial place in the first lens object side surface；
One second lens, it is concave surface to have negative refracting power, the paraxial place in the second lens object side surface；
One the third lens, it is aspherical to have positive refracting power, object side surface and image side surface；And
One the 4th lens, it is aspherical to have negative refracting power, object side surface and image side surface；
Wherein, which further includes an aperture, without tool refracting power lens between the aperture and first lens；
Wherein, the lens with refracting power are four in the imaging lens group, and between two adjacent lens with refracting power
With an airspace, the radius of curvature of the first lens object side surface is R1, the radius of curvature on the first lens image side surface
Radius of curvature for R2, the second lens object side surface is R3, and the radius of curvature on the second lens image side surface is R4, the imaging
The focal length of lens group is f, and the maximum image height of the imaging lens group is ImgH, which is CT1 in the thickness on optical axis,
Meet following condition：
(R3+R4)/(R3-R4)<0.0；
2.4<f/ImgH<6.5；
-0.50<R1/R2<0.50；And
3.0<(f/R1)-(f/R2)+((f*CT1)/(R1*R2))<7.5。
17. imaging lens group as claimed in claim 16, which is characterized in that the paraxial place in the third lens object side surface is recessed
Face.
18. imaging lens group as claimed in claim 16, which is characterized in that the 4th paraxial place in lens object side surface is convex
Face, the 4th paraxial place in lens image side surface are concave surface, and place has an at least convex surface off axis on the 4th lens image side surface.
19. imaging lens group as claimed in claim 16, which is characterized in that the half at the maximum visual angle of the imaging lens group is
HFOV meets following condition：
0.20<tan(2*HFOV)<0.90。
20. imaging lens group as claimed in claim 16, which is characterized in that first lens, second lens, the third are saturating
The material of mirror and the 4th lens is plastic cement, and the abbe number of second lens is V2, and the abbe number of the third lens is V3,
It meets following condition：
20<V2+V3<60。
21. imaging lens group as claimed in claim 16, which is characterized in that the radius of curvature of the second lens object side surface is
R3, the radius of curvature on the second lens image side surface are R4, the first lens object side surface a to imaging surface on optical axis away from
From for TL, meet following condition：
|R3|<|R4|；And
TL<10.0mm。
22. imaging lens group as claimed in claim 16, which is characterized in that the focal length of the imaging lens group is f, the imaging lens
The maximum image height of head group is ImgH, meets following condition：
2.7<f/ImgH<5.0。
23. imaging lens group as claimed in claim 16, which is characterized in that the radius of curvature of the first lens object side surface is
R1, the radius of curvature R 2 on the first lens image side surface, first lens are in the spacing distance on optical axis with second lens
T12, second lens are T23 in the spacing distance on optical axis with the third lens, and the third lens are with the 4th lens in light
Spacing distance on axis is T34, meets following condition：
-0.30<R1/R2<0.30；And
0<T12/(T23+T34)<0.60。
24. imaging lens group as claimed in claim 16, which is characterized in that the focal length of the imaging lens group be f, this first thoroughly
The radius of curvature of mirror object side surface is R1, which is CT1 in the thickness on optical axis, and second lens are in the thickness on optical axis
Degree is CT2, meets following condition：
3.3<f/R1<8.5；And
1.7<CT1/CT2<8.0。
25. imaging lens group as claimed in claim 16, which is characterized in that at least the one of the third lens or the 4th lens
It is TL, the imaging in the distance on optical axis to have an at least point of inflexion, the first lens object side surface a to imaging surface on surface
The maximum image height of lens group is ImgH, meets following condition：
2.5<TL/ImgH<4.0。
26. imaging lens group as claimed in claim 16, which is characterized in that place has extremely off axis for the second lens object side surface
The effective radius on a few convex surface, the first lens object side surface is Y11, and the effective radius on the 4th lens image side surface is Y42,
It meets following condition：
0.7<Y11/Y42<1.8。
27. imaging lens group as claimed in claim 16, which is characterized in that in first lens between the 4th lens, appoint
Between two adjacent lens in the largest interval distance on optical axis between the second lens and the third lens, second lens with should
The third lens are T23 in the distance on optical axis, and the third lens and the 4th lens are T34 at a distance from optical axis, and the third is saturating
Mirror is CT3 in the thickness on optical axis, meets following condition：
2.50<(T23+T34)/CT3。
28. imaging lens group as claimed in claim 16, which is characterized in that in first lens between the 4th lens, appoint
Between two adjacent lens in the largest interval distance on optical axis between the third lens and the 4th lens.
29. a kind of image-taking device includes imaging lens group and an electronics photosensitive element described in claim 16.
30. a kind of electronic device includes the image-taking device described in claim the 29.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510145417.1A CN106154507B (en) | 2015-03-31 | 2015-03-31 | Imaging lens group, image-taking device and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510145417.1A CN106154507B (en) | 2015-03-31 | 2015-03-31 | Imaging lens group, image-taking device and electronic device |
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| Publication Number | Publication Date |
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| CN106154507A CN106154507A (en) | 2016-11-23 |
| CN106154507B true CN106154507B (en) | 2018-10-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11774709B2 (en) | 2019-08-30 | 2023-10-03 | Samsung Electro-Mechanics Co., Ltd. | Optical imaging system and portable electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115185065A (en) * | 2019-06-25 | 2022-10-14 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
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| JP2007122007A (en) * | 2005-09-29 | 2007-05-17 | Fujinon Corp | Imaging lens |
| JP2010060980A (en) * | 2008-09-05 | 2010-03-18 | Konica Minolta Opto Inc | Image pickup lens, image pickup apparatus and mobile terminal |
| CN103257430A (en) * | 2012-02-15 | 2013-08-21 | 大立光电股份有限公司 | Optical lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201211614A (en) * | 2010-09-10 | 2012-03-16 | Genius Electronic Optical Co Ltd | Imaging lens composed of four lenses and electronic device using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007122007A (en) * | 2005-09-29 | 2007-05-17 | Fujinon Corp | Imaging lens |
| JP2010060980A (en) * | 2008-09-05 | 2010-03-18 | Konica Minolta Opto Inc | Image pickup lens, image pickup apparatus and mobile terminal |
| CN103257430A (en) * | 2012-02-15 | 2013-08-21 | 大立光电股份有限公司 | Optical lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11774709B2 (en) | 2019-08-30 | 2023-10-03 | Samsung Electro-Mechanics Co., Ltd. | Optical imaging system and portable electronic device |
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