CN106980172A - Wide-angle image lens set - Google Patents
Wide-angle image lens set Download PDFInfo
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- CN106980172A CN106980172A CN201610025654.9A CN201610025654A CN106980172A CN 106980172 A CN106980172 A CN 106980172A CN 201610025654 A CN201610025654 A CN 201610025654A CN 106980172 A CN106980172 A CN 106980172A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
- 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
- G02B13/004—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 four lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The present invention is a kind of wide-angle image lens set, is sequentially included by thing side to image side：One aperture；One first lens, with positive refracting power；One second lens, with negative refracting power；One the 3rd lens, with positive refracting power；One the 4th lens, with negative refracting power；It is characterized in that the focal length of first lens is f1, the synthesis focal length of second lens and the 3rd lens is f23, and meets following condition：0.4<f1/f23<1.7；Thereby, then it can make the wide-angle image lens set while extensive picture angle (angle of visual field) is obtained, its resolving power is obviously improved.
Description
Technical field
The present invention is relevant with wide-angle image lens set, particularly relates to a kind of miniaturization four-piece type wide-angle image lens set applied on electronic product.
Background technology
With the rise of the electronic product with camera function, the demand of optical system is increasingly improved.In shooting, to obtain wider coverage, it is necessary to camera lens
Visual angle meet certain requirements, it is thus also more and more stricter for the requirement of lens shooting angle and image quality.The picture angle (angle of visual field FOV) of usual camera lens is designed as 50
Spend to 60 degree, if it exceeds the angle of design above, not only aberration is larger, and the design of camera lens is also complex.Known US 8335043, US 8576497 make
With 2 eyeglasses group, 5 to 6 reach wide-angle purpose, so its distort (distortion) it is too big, and such as US 8593737, US 8576497, US 8395853,
Although it can reach wide-angle purpose, the total length (TL) of its lens group is oversize.
Therefore how to develop a kind of wide-angle image lens set of miniaturization, it is except being configurable on the camera lens that the camera lens, network cameras that digital camera is used are used
Or outside the electronic product such as mobile phone camera lens, with more larger picture angle, reduce effect of aberration, be research and development of the present invention to reduce the complexity of lens design
Motivation.
The content of the invention
It is an object of the invention to provide a kind of wide-angle image lens set, espespecially a kind of lifting picture angle, have high analytic ability, short lens length, four of small distortion
Wide-angle imaging lens group.
In order to reach object defined above, according to a kind of wide-angle image lens set provided by the present invention, sequentially included by thing side to image side：One aperture；One first lens,
It is convex surface at convex surface, its image side surface dipped beam axle to be with positive refracting power, at its thing side surface dipped beam axle, and its thing side surface is non-with an image side surface at least surface
Sphere；One second lens, are concave surface with negative refracting power, at its thing side surface dipped beam axle, and its thing side surface is aspherical with an image side surface at least surface；One
3rd lens, are convex surface with positive refracting power, at its image side surface dipped beam axle, and its thing side surface is aspherical with an image side surface at least surface；One the 4th lens,
It is convex surface with negative refracting power, at its thing side surface dipped beam axle, its thing side surface is aspherical, its thing side surface and image side surface with an image side surface at least surface
An at least surface has an at least point of inflexion；
Wherein, the focal length of first lens is f1, and the synthesis focal length of second lens and the 3rd lens is f23, and meets following condition：0.4<f1/f23<1.7.
When f1/f23 meets above-mentioned condition, then it can make the wide-angle image lens set while extensive picture angle (angle of visual field) is obtained, its resolving power is obviously improved.
It is preferred that being concave surface at the thing side surface dipped beam axle of the 3rd lens, at the dipped beam axle of image side surface being convex surface；At the thing side surface dipped beam axle of 4th lens
To be concave surface at convex surface, image side surface dipped beam axle.
It is preferred that the focal length of first lens is f1, the focal length of second lens is f2, and meets following condition：-0.9<f1/f2<-0.3.Thereby,
Make the refracting power configuration of first lens and second lens more suitable, can be conducive to obtaining the extensive excessive increase drawn angle (angle of visual field) and reduce system aberration.
It is preferred that the focal length of second lens is f2, the focal length of the 3rd lens is f3, and meets following condition：-4.2<f2/f3<-1.3.Thereby,
The refracting power configuration of second lens and the 3rd lens is more balanced, contribute to the amendment of aberration and the reduction of susceptibility.
It is preferred that the focal length of the 3rd lens is f3, the focal length of the 4th lens is f4, and meets following condition：-1.1<f3/f4<-0.4.Thereby,
It is advantageously ensured that the 3rd lens and one positive one negative (Telephoto) structure of looking in the distance of the 4th lens forming, can effectively reduce system optics total length.
It is preferred that the focal length of first lens is f1, the focal length of the 3rd lens is f3, and meets following condition：0.7<f1/f3<2.1.Thereby, have
The positive refracting power of effect the first lens of distribution, reduces the susceptibility of wide-angle image lens set.
It is preferred that the focal length of second lens is f2, the focal length of the 4th lens is f4, and meets following condition：0.55<f2/f4<4.0.Thereby, it is
The negative refracting power distribution of system is more suitable, is conducive to update the system aberration to improve system imaging quality.
It is preferred that the synthesis focal length of second lens and the 3rd lens is f23, the focal length of the 4th lens is f4, and meets following condition：-1.3<f23/f4
<-0.6.Thereby, then it can make the wide-angle image lens set while extensive picture angle (angle of visual field) is obtained, its resolving power is obviously improved.
It is preferred that the synthesis focal length of first lens and the second lens is f12, the synthesis focal length of the 3rd lens and the 4th lens is f34, and meets following condition：
0.3<f12/f34<2.2.Thereby, it can be conducive to obtaining extensive picture angle (angle of visual field) and effectively correct curvature of the image.
It is preferred that the whole focal length of the wide-angle image lens set is f, the thing side surface of first lens to imaging surface is TL in the distance on optical axis, and under meeting
Row condition：0.5<f/TL<0.8.Thereby, it can be conducive to obtaining the extensive miniaturization drawn angle (angle of visual field) and be conducive to maintaining the wide-angle image lens set,
To be equipped on frivolous electronic product.
It is preferred that the maximum field of view angle of the wide-angle image lens set is FOV, and meet following condition：75<FOV<95.Thereby, the wide-angle image eyeglass is made
Group can have appropriate larger field angle.
It is preferred that second lens are CT2 in the thickness on optical axis, first lens are CT1 in the thickness on optical axis, and meet following condition：0.2<CT2/
CT1<0.7.Thereby, the first lens and the second lens is had appropriate thickness, be easier to ejection formation.
It is preferred that first lens and the second lens are T12 in the spacing distance on optical axis, second lens are CT2 in the thickness on optical axis, and meet following bar
Part：0.05<T12/CT2<1.25.Thereby, the maximum field of view angle of the wide-angle image lens set can further be increased.
It is preferred that the image side surface curvature radius of first lens is R2, the thing side surface radius of curvature of second lens is R3, and meets following condition：0.01
<R2/R3<4.3.Effectively reduce the spherical aberration and astigmatism of the wide-angle image lens set.
It is preferred that the abbe number of first lens is V1, the abbe number of second lens is V2, and meets following condition：30<V1-V2<42.Thereby,
Effectively reduce the aberration of wide-angle image lens set.
The relevant present invention uses it technology, means and other effects, hereby lifts eight preferable possible embodiments and coordinate schema specifically to reach above-mentioned purpose
It is bright as after.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, the accompanying drawing used required for the present invention is briefly described below, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Figure 1A is the schematic diagram of the wide-angle image lens set of first embodiment of the invention.
Figure 1B is sequentially spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of first embodiment from left to right.
Fig. 2A is the schematic diagram of the wide-angle image lens set of second embodiment of the invention.
Fig. 2 B are sequentially spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of second embodiment from left to right.
Fig. 3 A are the schematic diagrames of the wide-angle image lens set of third embodiment of the invention.
Fig. 3 B are sequentially spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of 3rd embodiment from left to right.
Fig. 4 A are the schematic diagrames of the wide-angle image lens set of fourth embodiment of the invention.
Fig. 4 B are sequentially spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of fourth embodiment from left to right.
Fig. 5 A are the schematic diagrames of the wide-angle image lens set of fifth embodiment of the invention.
Fig. 5 B are sequentially spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of the 5th embodiment from left to right.
Fig. 6 A are the schematic diagrames of the wide-angle image lens set of sixth embodiment of the invention.
Fig. 6 B are sequentially spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of sixth embodiment from left to right.
Fig. 7 A are the schematic diagrames of the wide-angle image lens set of seventh embodiment of the invention.
Fig. 7 B are sequentially spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of the 7th embodiment from left to right.
Fig. 8 A are the schematic diagrames of the wide-angle image lens set of eighth embodiment of the invention.
Fig. 8 B are sequentially spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of the 8th embodiment from left to right.
Description of reference numerals
100、200、300、400、500、600、700、800：Aperture
110、210、310、410、510、610、710、810：First lens
111、211、311、411、511、611、711、811：Thing side surface
112、212、312、412、512、612、712、812：Image side surface
120、220、320、420、520、620、720、820：Second lens
121、221、321、421、521、621、721、821：Thing side surface
122、222、322、422、522、622、722、822：Image side surface
130、230、330、430、530、630、730、830：3rd lens
131、231、331、431、531、631、731、831：Thing side surface
132、232、332、432、532、632、732、832：Image side surface
140、240、340、440、540、640、740、840：4th lens
141、241、341、441、541、641、741、841：Thing side surface
142、242、342、442、542、642、742、842：Image side surface
170、270、370、470、570、670、770、870：Infrared ray filters out filtering assembly
180、280、380、480、580、680、780、880：Imaging surface
190、290、390、490、590、690、790、890：Optical axis
f：The focal length Fno of wide-angle image lens set：The f-number of wide-angle image lens set
FOV：Maximum field of view angle f1 in wide-angle image lens set：The focal length of first lens
f2：The focal length f3 of second lens：The focal length of 3rd lens
f4：The focal length f12 of 4th lens：The synthesis focal length of first lens and the second lens
f23：The synthesis focal length f34 of second lens and the 3rd lens：The synthesis focal length of 3rd lens and the 4th lens
R2：The image side surface curvature radius R3 of first lens：The thing side surface radius of curvature of second lens
V1：The abbe number V2 of first lens：The abbe number of second lens
CT1：First lens are in the thickness CT2 on optical axis：Second lens are in the thickness on optical axis
T12：First lens and the second lens are in the spacing distance on optical axis
TL：The thing side surface of first lens is to imaging surface in the distance on optical axis
Embodiment
<First embodiment>
Figure 1A and Figure 1B is refer to, wherein Figure 1A illustrates the schematic diagram of the wide-angle image lens set according to first embodiment of the invention, and Figure 1B is sequentially from left to right
Spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of first embodiment.From Figure 1A, wide-angle image lens set is to include an aperture 100 and one
Optics group, the optics group is sequentially filtered out by thing side to image side comprising the first lens 110, the second lens 120, the 3rd lens 130, the 4th lens 140, infrared ray
Filtering assembly 170 and imaging surface 180, it is characterised in that the lens for having refracting power in the wide-angle image lens set are four.The aperture 100 be arranged on this first
Between the image side surface 112 of lens 110 and object.
First lens 110 have positive refracting power, and it is convex surface, its dipped beam axle 190 of image side surface 112 at plastic material, its dipped beam axle 190 of thing side surface 111 to be
Locate as convex surface, and the thing side surface 111 and image side surface 112 are all aspherical.
Second lens 120 have negative refracting power, and it is concave surface, its dipped beam axle 190 of image side surface 122 at plastic material, its dipped beam axle 190 of thing side surface 121 to be
Locate as convex surface, and the thing side surface 121 and image side surface 122 are all aspherical.
3rd lens 130 have positive refracting power, and it is concave surface, its dipped beam axle 190 of image side surface 132 at plastic material, its dipped beam axle 190 of thing side surface 131 to be
Locate as convex surface, and the thing side surface 131 and image side surface 132 are all aspherical.
4th lens 140 have negative refracting power, and it is convex surface, its dipped beam axle 190 of image side surface 142 at plastic material, its dipped beam axle 190 of thing side surface 141 to be
Locate as concave surface, and the thing side surface 141 and image side surface 142 are all aspherical, and the thing side surface 141 and a image side surface 142 at least surface have at least
One point of inflexion.
The infrared ray filters out filtering assembly 170 for glass material, and it is arranged between the 4th lens 140 and imaging surface 180 and does not influence the wide-angle image lens set
Focal length.
The aspherical fitting equation of above-mentioned each lens is expressed as follows：
Wherein, z is the positional value for making to refer to surface vertices in the position that height is h along the direction of optical axis 190；C is curvature of the lens surface close to optical axis 190, and
For radius of curvature (R) inverse (c=1/R), R be lens surface close to the radius of curvature of optical axis 190, h is vertical range of the lens surface apart from optical axis 190, k
For circular cone coefficient (conic constant), and A, B, C, D, E, G ... be order aspherical coefficients.
In the wide-angle image lens set of first embodiment, the focal length of wide-angle image lens set is f, and the f-number (f-number) of wide-angle image lens set is Fno,
Maximum field of view angle (picture angle) is FOV in wide-angle image lens set, and its numerical value is as follows：F=1.978 (millimetre)；Fno=2.0；And FOV=88 (degree).
In the wide-angle image lens set of first embodiment, the synthesis focal length of the lens 130 of the second lens 120 and the 3rd is f23, and the focal length of the 4th lens 140 is
F4, and meet following condition：F23/f4=-1.0061.
In the wide-angle image lens set of first embodiment, the focal length of first lens 110 is f1, and the focal length of second lens 120 is f2, and meets following condition：
F1/f2=-0.6443.
In the wide-angle image lens set of first embodiment, the focal length of second lens 120 is f2, and the focal length of the 3rd lens 130 is f3, and meets following condition：
F2/f3=-2.2334.
In the wide-angle image lens set of first embodiment, the focal length of the 3rd lens 130 is f3, and the focal length of the 4th lens 140 is f4, and meets following condition：
F3/f4=-0.8555.
In the wide-angle image lens set of first embodiment, the focal length of first lens 110 is f1, and the focal length of the 3rd lens 130 is f3, and meets following condition：
F1/f3=1.4389.
In the wide-angle image lens set of first embodiment, the focal length of second lens 120 is f2, and the focal length of the 4th lens 140 is f4, and meets following condition：
F2/f4=1.9107.
In the wide-angle image lens set of first embodiment, the focal length of first lens 110 is f1, and the synthesis focal length of second lens 120 and the 3rd lens 130 is
F23, and meet following condition：F1/f23=1.2235.
In the wide-angle image lens set of first embodiment, the synthesis focal lengths of the lens 120 of the first lens 110 and second is f12, the 3rd lens 130 and the 4th saturating
The synthesis focal length of mirror 140 is f34, and meets following condition：F12/f34=1.0944.
In the wide-angle image lens set of first embodiment, the whole focal length of the wide-angle image lens set is f, the thing side surface 111 of first lens 110 to imaging surface
180 be TL in the distance on optical axis 190, and meets following condition：F/TL=0.6571.
In the wide-angle image lens set of first embodiment, second lens 120 are CT2 in the thickness on optical axis 180, and first lens 110 are in the thickness on optical axis 180
Spend for CT1, and meet following condition：CT2/CT1=0.3537.
In the wide-angle image lens set of first embodiment, the lens 120 of the first lens 110 and second are T12, second lens in the spacing distance on optical axis 190
120 be CT2 in the thickness on optical axis 190, and meets following condition：T12/CT2=1.1152.
In the wide-angle image lens set of first embodiment, the radius of curvature of image side surface 112 of first lens 110 is R2, the thing side surface 121 of second lens 120
Radius of curvature is R3, and meets following condition：R2/R3=2.8890.
In the wide-angle image lens set of first embodiment, the abbe number of first lens 110 is V1, and the abbe number of second lens 120 is V2, and is met
Following condition：V1-V2=32.1.
Coordinate again with reference to following table 1 and table 2.
Table 1 is the detailed structured data of Figure 1A first embodiments, and the wherein unit of radius of curvature, thickness and focal length is mm, and surface 0-13 is sequentially represented by thing side
To the surface of image side.Table 2 be first embodiment in aspherical surface data, wherein, the conical surface coefficient in k table aspheric curve equations, A, B, C, D, E,
F, G ... be order aspherical coefficients.In addition, following embodiment form is the schematic diagram and aberration curve figure of each embodiment of correspondence, data in form
Definition is identical all with the definition of the table 1 and table 2 of first embodiment, is not added with repeating herein.
<Second embodiment>
Fig. 2A and Fig. 2 B are refer to, wherein Fig. 2A illustrates the schematic diagram of the wide-angle image lens set according to second embodiment of the invention, and Fig. 2 B are sequentially from left to right
Spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of second embodiment.From Fig. 2A, wide-angle image eyeglass system includes an aperture 200 and one
Optics group, the optics group is sequentially filtered out by thing side to image side comprising the first lens 210, the second lens 220, the 3rd lens 230, the 4th lens 240, infrared ray
The lens for having refracting power in filtering assembly 270 and imaging surface 280, wherein the wide-angle image lens set are four.The aperture 200 is arranged on first lens 210
Image side surface 212 and object between.
First lens 210 have positive refracting power, and it is convex surface, its dipped beam axle 290 of image side surface 212 at plastic material, its dipped beam axle 290 of thing side surface 211 to be
Locate as convex surface, and the thing side surface 211 and image side surface 212 are all aspherical.
Second lens 220 have negative refracting power, and it is concave surface, its dipped beam axle 290 of image side surface 222 at plastic material, its dipped beam axle 290 of thing side surface 221 to be
Locate as convex surface, and the thing side surface 221 and image side surface 222 are all aspherical.
3rd lens 230 have positive refracting power, and it is concave surface, its dipped beam axle 290 of image side surface 232 at plastic material, its dipped beam axle 290 of thing side surface 231 to be
Locate as convex surface, and the thing side surface 231 and image side surface 232 are all aspherical.
4th lens 240 have negative refracting power, and it is convex surface, its dipped beam axle 290 of image side surface 242 at plastic material, its dipped beam axle 290 of thing side surface 241 to be
Locate as concave surface, and the thing side surface 241 and image side surface 242 are all aspherical, and the thing side surface 241 and a image side surface 242 at least surface have at least
One point of inflexion.
The infrared ray filters out filtering assembly 270 for glass material, and it is arranged between the 4th lens 240 and imaging surface 280 and does not influence the wide-angle image lens set
Focal length.
Coordinate again with reference to following table 3 and table 4.
In second embodiment, aspherical fitting equation represents the form such as first embodiment.In addition, the definition of following table parameter is all identical with first embodiment,
Not in this to go forth.
Cooperation table 3 and table 4 can extrapolate following data：
<3rd embodiment>
Fig. 3 A and Fig. 3 B are refer to, wherein Fig. 3 A illustrate the schematic diagram of the wide-angle image lens set according to third embodiment of the invention, and Fig. 3 B are sequentially from left to right
Spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of 3rd embodiment.From Fig. 3 A, wide-angle image lens set is to include an aperture 300 and one
Optics group, the optics group is sequentially filtered out by thing side to image side comprising the first lens 310, the second lens 320, the 3rd lens 330, the 4th lens 340, infrared ray
The lens for having refracting power in filtering assembly 370 and imaging surface 380, wherein the wide-angle image lens set are four.The aperture 300 is arranged on first lens 310
Image side surface 312 and object between.
First lens 310 have positive refracting power, and it is convex surface, its dipped beam axle 390 of image side surface 312 at plastic material, its dipped beam axle 390 of thing side surface 311 to be
Locate as convex surface, and the thing side surface 311 and image side surface 312 are all aspherical.
Second lens 320 have negative refracting power, and it is concave surface, its dipped beam axle 390 of image side surface 322 at plastic material, its dipped beam axle 390 of thing side surface 321 to be
Locate as convex surface, and the thing side surface 321 and image side surface 322 are all aspherical.
3rd lens 330 have positive refracting power, and it is concave surface, its dipped beam axle 390 of image side surface 332 at plastic material, its dipped beam axle 390 of thing side surface 331 to be
Locate as convex surface, and the thing side surface 331 and image side surface 332 are all aspherical.
4th lens 340 have negative refracting power, and it is convex surface, its dipped beam axle 390 of image side surface 342 at plastic material, its dipped beam axle 390 of thing side surface 341 to be
Locate as concave surface, and the thing side surface 341 and image side surface 342 are all aspherical, and the thing side surface 341 and a image side surface 342 at least surface have at least
One point of inflexion.
The infrared ray filters out filtering assembly 370 for glass material, and it is arranged between the 4th lens 340 and imaging surface 380 and does not influence the wide-angle image lens set
Focal length.
Coordinate again with reference to following table 5 and table 6.
In 3rd embodiment, aspherical fitting equation represents the form such as first embodiment.In addition, the definition of following table parameter is all identical with first embodiment,
Not in this to go forth.
Cooperation table 5 and table 6 can extrapolate following data：
<Fourth embodiment>
Fig. 4 A and Fig. 4 B are refer to, wherein Fig. 4 A illustrate the schematic diagram of the wide-angle image lens set according to fourth embodiment of the invention, and Fig. 4 B are sequentially from left to right
Spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of fourth embodiment.From Fig. 4 A, wide-angle image lens set is to include an aperture 400 and one
Optics group, the optics group is sequentially filtered out by thing side to image side comprising the first lens 410, the second lens 420, the 3rd lens 430, the 4th lens 440, infrared ray
The lens for having refracting power in filtering assembly 470 and imaging surface 480, wherein the wide-angle image lens set are four.The aperture 400 is arranged on first lens 410
Image side surface 412 and object between.
First lens 410 have positive refracting power, and it is convex surface, its dipped beam axle 490 of image side surface 412 at plastic material, its dipped beam axle 490 of thing side surface 411 to be
Locate as convex surface, and the thing side surface 411 and image side surface 412 are all aspherical.
Second lens 420 have negative refracting power, and it is concave surface, its dipped beam axle 490 of image side surface 422 at plastic material, its dipped beam axle 490 of thing side surface 421 to be
Locate as convex surface, and the thing side surface 421 and image side surface 422 are all aspherical.
3rd lens 430 have positive refracting power, and it is concave surface, its dipped beam axle 490 of image side surface 432 at plastic material, its dipped beam axle 490 of thing side surface 431 to be
Locate as convex surface, and the thing side surface 431 and image side surface 432 are all aspherical.
4th lens 440 have negative refracting power, and it is convex surface, its dipped beam axle 490 of image side surface 442 at plastic material, its dipped beam axle 490 of thing side surface 441 to be
Locate as concave surface, and the thing side surface 441 and image side surface 442 are all aspherical, and the thing side surface 441 and a image side surface 442 at least surface have at least
One point of inflexion.
The infrared ray filters out filtering assembly 470 for glass material, and it is arranged between the 4th lens 440 and imaging surface 480 and does not influence the wide-angle image lens set
Focal length.
Coordinate again with reference to following table 7 and table 8.
In fourth embodiment, aspherical fitting equation represents the form such as first embodiment.In addition, the definition of following table parameter is all identical with first embodiment,
Not in this to go forth.
Cooperation table 7 and table 8 can extrapolate following data：
<5th embodiment>
Fig. 5 A and Fig. 5 B are refer to, wherein Fig. 5 A illustrate the schematic diagram of the wide-angle image lens set according to fifth embodiment of the invention, and Fig. 5 B are sequentially from left to right
Spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of 5th embodiment.From Fig. 5 A, wide-angle image lens set is to include an aperture 500 and one
Optics group, the optics group is sequentially filtered out by thing side to image side comprising the first lens 510, the second lens 520, the 3rd lens 530, the 4th lens 540, infrared ray
The lens for having refracting power in filtering assembly 570 and imaging surface 580, wherein the wide-angle image lens set are four.The aperture 500 is arranged on first lens 510
Image side surface 512 and object between.
First lens 510 have positive refracting power, and it is convex surface, its dipped beam axle 590 of image side surface 512 at plastic material, its dipped beam axle 590 of thing side surface 511 to be
Locate as convex surface, and the thing side surface 511 and image side surface 512 are all aspherical.
Second lens 520 have negative refracting power, and it is concave surface, its dipped beam axle 590 of image side surface 522 at plastic material, its dipped beam axle 590 of thing side surface 521 to be
Locate as concave surface, and the thing side surface 521 and image side surface 522 are all aspherical.
3rd lens 530 have positive refracting power, and it is concave surface, its dipped beam axle 590 of image side surface 532 at plastic material, its dipped beam axle 590 of thing side surface 531 to be
Locate as convex surface, and the thing side surface 531 and image side surface 532 are all aspherical.
4th lens 540 have negative refracting power, and it is convex surface, its dipped beam axle 590 of image side surface 542 at plastic material, its dipped beam axle 590 of thing side surface 541 to be
Locate as concave surface, and the thing side surface 541 and image side surface 542 are all aspherical, and the thing side surface 541 and a image side surface 542 at least surface have at least
One point of inflexion.
The infrared ray filters out filtering assembly 570 for glass material, and it is arranged between the 4th lens 540 and imaging surface 580 and does not influence the wide-angle image lens set
Focal length.
Coordinate again with reference to following table 9 and table 10.
In 5th embodiment, aspherical fitting equation represents the form such as first embodiment.In addition, the definition of following table parameter is all identical with first embodiment,
Not in this to go forth.
Cooperation table 9 and table 10 can extrapolate following data：
<Sixth embodiment>
Fig. 6 A and Fig. 6 B are refer to, wherein Fig. 6 A illustrate the schematic diagram of the wide-angle image lens set according to sixth embodiment of the invention, and Fig. 6 B are sequentially from left to right
Spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of sixth embodiment.From Fig. 6 A, wide-angle image lens set is to include an aperture 600 and one
Optics group, the optics group is sequentially filtered out by thing side to image side comprising the first lens 610, the second lens 620, the 3rd lens 630, the 4th lens 640, infrared ray
The lens for having refracting power in filtering assembly 670 and imaging surface 680, wherein the wide-angle image lens set are four.The aperture 600 is arranged on first lens 610
Image side surface 612 and object between.
First lens 610 have positive refracting power, and it is convex surface, its dipped beam axle 690 of image side surface 612 at plastic material, its dipped beam axle 690 of thing side surface 611 to be
Locate as convex surface, and the thing side surface 611 and image side surface 612 are all aspherical.
Second lens 620 have negative refracting power, and it is concave surface, its dipped beam axle 690 of image side surface 622 at plastic material, its dipped beam axle 690 of thing side surface 621 to be
Locate as concave surface, and the thing side surface 621 and image side surface 622 are all aspherical.
3rd lens 630 have positive refracting power, and it is concave surface, its dipped beam axle 690 of image side surface 632 at plastic material, its dipped beam axle 690 of thing side surface 631 to be
Locate as convex surface, and the thing side surface 631 and image side surface 632 are all aspherical.
4th lens 640 have negative refracting power, and it is convex surface, its dipped beam axle 690 of image side surface 642 at plastic material, its dipped beam axle 690 of thing side surface 641 to be
Locate as concave surface, and the thing side surface 641 and image side surface 642 are all aspherical, and the thing side surface 641 and a image side surface 642 at least surface have at least
One point of inflexion.
The infrared ray filters out filtering assembly 670 for glass material, and it is arranged between the 4th lens 640 and imaging surface 680 and does not influence the wide-angle image lens set
Focal length.
Coordinate again with reference to following table 11 and table 12.
In sixth embodiment, aspherical fitting equation represents the form such as first embodiment.In addition, the definition of following table parameter is all identical with first embodiment,
Not in this to go forth.
Cooperation table 11 and table 12 can extrapolate following data：
<7th embodiment>
Fig. 7 A and Fig. 7 B are refer to, wherein Fig. 7 A illustrate the schematic diagram of the wide-angle image lens set according to seventh embodiment of the invention, and Fig. 7 B are sequentially from left to right
Spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of 7th embodiment.From Fig. 7 A, wide-angle image lens set is to include an aperture 700 and one
Optics group, the optics group is sequentially filtered out by thing side to image side comprising the first lens 710, the second lens 720, the 3rd lens 730, the 4th lens 740, infrared ray
The lens for having refracting power in filtering assembly 770 and imaging surface 780, wherein the wide-angle image lens set are four.The aperture 700 is arranged on first lens 710
Image side surface 712 and object between.
First lens 710 have positive refracting power, and it is convex surface, its dipped beam axle 790 of image side surface 712 at plastic material, its dipped beam axle 790 of thing side surface 711 to be
Locate as convex surface, and the thing side surface 711 and image side surface 712 are all aspherical.
Second lens 720 have negative refracting power, and it is concave surface, its dipped beam axle 790 of image side surface 722 at plastic material, its dipped beam axle 790 of thing side surface 721 to be
Locate as concave surface, and the thing side surface 721 and image side surface 722 are all aspherical.
3rd lens 730 have positive refracting power, and it is concave surface, its dipped beam axle 790 of image side surface 732 at plastic material, its dipped beam axle 790 of thing side surface 731 to be
Locate as convex surface, and the thing side surface 731 and image side surface 732 are all aspherical.
4th lens 740 have negative refracting power, and it is convex surface, its dipped beam axle 790 of image side surface 742 at plastic material, its dipped beam axle 790 of thing side surface 741 to be
Locate as concave surface, and the thing side surface 741 and image side surface 742 are all aspherical, and the thing side surface 741 and a image side surface 742 at least surface have at least
One point of inflexion.
The infrared ray filters out filtering assembly 770 for glass material, and it is arranged between the 4th lens 740 and imaging surface 780 and does not influence the wide-angle image lens set
Focal length.
Coordinate again with reference to following table 13 and table 14.
In 7th embodiment, aspherical fitting equation represents the form such as first embodiment.In addition, the definition of following table parameter is all identical with first embodiment,
Not in this to go forth.
Cooperation table 13 and table 14 can extrapolate following data：
<8th embodiment>
Fig. 8 A and Fig. 8 B are refer to, wherein Fig. 8 A illustrate the schematic diagram of the wide-angle image lens set according to eighth embodiment of the invention, and Fig. 8 B are sequentially from left to right
Spherical aberration, astigmatism and the distortion curve map of the wide-angle image lens set of eight embodiments.From Fig. 8 A, wide-angle image lens set is to include an aperture 800 and a light
Group, the optics group is sequentially filtered out by thing side to image side comprising the first lens 810, the second lens 820, the 3rd lens 830, the 4th lens 840, infrared ray
The lens for having refracting power in optical assembly 870 and imaging surface 880, wherein the wide-angle image lens set are four.The aperture 800 is arranged on first lens 810
Image side surface 812 and object between.
First lens 810 have positive refracting power, and it is convex surface, its dipped beam axle 890 of image side surface 812 at plastic material, its dipped beam axle 890 of thing side surface 811 to be
Locate as convex surface, and the thing side surface 811 and image side surface 812 are all aspherical.
Second lens 820 have negative refracting power, and it is concave surface, its dipped beam axle 890 of image side surface 822 at plastic material, its dipped beam axle 890 of thing side surface 821 to be
Locate as concave surface, and the thing side surface 821 and image side surface 822 are all aspherical.
3rd lens 830 have positive refracting power, and it is concave surface, its dipped beam axle 890 of image side surface 832 at plastic material, its dipped beam axle 890 of thing side surface 831 to be
Locate as convex surface, and the thing side surface 831 and image side surface 832 are all aspherical.
4th lens 840 have negative refracting power, and it is convex surface, its dipped beam axle 890 of image side surface 842 at plastic material, its dipped beam axle 890 of thing side surface 841 to be
Locate as concave surface, and the thing side surface 841 and image side surface 842 are all aspherical, and the thing side surface 841 and a image side surface 842 at least surface have at least
One point of inflexion.
The infrared ray filters out filtering assembly 870 for glass material, and it is arranged between the 4th lens 840 and imaging surface 880 and does not influence the wide-angle image lens set
Focal length.
Coordinate again with reference to following table 15 and table 16.
In 8th embodiment, aspherical fitting equation represents the form such as first embodiment.In addition, the definition of following table parameter is all identical with first embodiment,
Not in this to go forth.
Cooperation table 15 and table 16 can extrapolate following data：
The wide-angle image lens set that the present invention is provided, the material of lens can be plastics or glass, when lens material is plastics, can effectively reduce production cost,
The another material for working as lens is glass, then can increase the free degree of wide-angle image lens set refracting power configuration.In addition, in wide-angle image lens set lens thing side
Surface and image side surface can be aspherical, the aspherical shape that can be easily fabricated to beyond sphere, and the more control variable of acquisition, to cut down aberration, enters
And reduce the number that lens are used, therefore can effectively reduce the total length of wide-angle image lens set of the present invention.
In the wide-angle image lens set that the present invention is provided, for the lens with refracting power, if lens surface is for convex surface and when not defining the convex surface position,
It is convex surface at dipped beam axle then to represent the lens surface；If lens surface is for concave surface and when not defining the concave surface position, then it represents that the lens surface is in dipped beam axle
Locate as concave surface.
The more visual demand of wide-angle image lens set that the present invention is provided is applied in the optical system of mobile focusing, and has excellent lens error correction and good imaging matter concurrently
The characteristic of amount, many-sided can be applied in the electronic image systems such as 3D (three-dimensional) image capture, digital camera, running gear, Digital Drawing plate or automobile-used photography.
In summary, the various embodiments described above and schema are only presently preferred embodiments of the present invention, when can not with restriction implementation of the invention scope, i.e., generally
The equivalent changes and modifications made according to scope of the present invention patent, should all be remained within the scope of the patent.
Claims (15)
1. a kind of wide-angle image lens set, it is characterised in that sequentially included by thing side to image side：
One aperture；
One first lens, it is convex surface, its thing side surface and image side surface at least one at convex surface, its image side surface dipped beam axle to be with positive refracting power, at its thing side surface dipped beam axle
Surface is aspherical；
One second lens, are concave surface with negative refracting power, at its thing side surface dipped beam axle, and its thing side surface is aspherical with an image side surface at least surface；
One the 3rd lens, are convex surface with positive refracting power, at its image side surface dipped beam axle, and its thing side surface is aspherical with an image side surface at least surface；
One the 4th lens, are convex surface with negative refracting power, at its thing side surface dipped beam axle, its thing side surface be with an image side surface at least surface it is aspherical, its thing side surface and
An image side surface at least surface has an at least point of inflexion；
Wherein the focal length of first lens is f1, and the synthesis focal length of second lens and the 3rd lens is f23, and meets following condition：0.4<f1/f23<1.7.
2. wide-angle image lens set as claimed in claim 1, it is characterised in that be concave surface at the thing side surface dipped beam axle of the 3rd lens, at the dipped beam axle of image side surface be convex
Face；It is convex surface at the thing side surface dipped beam axle of 4th lens, at the dipped beam axle of image side surface is concave surface.
3. wide-angle image lens set as claimed in claim 1, it is characterised in that the focal length of first lens is f1, and the focal length of second lens is f2, and meets following bar
Part：-0.9<f1/f2<-0.3.
4. the wide-angle image lens set stated such as claim 1, it is characterised in that the focal length of second lens is f2, and the focal length of the 3rd lens is f3, and meets following condition：
-4.2<f2/f3<-1.3。
5. wide-angle image lens set as claimed in claim 1, it is characterised in that the focal length of the 3rd lens is f3, and the focal length of the 4th lens is f4, and meets following bar
Part：-1.1<f3/f4<-0.4.
6. wide-angle image lens set as claimed in claim 1, it is characterised in that the focal length of first lens is f1, and the focal length of the 3rd lens is f3, and meets following bar
Part：0.7<f1/f3<2.1.
7. wide-angle image lens set as claimed in claim 1, it is characterised in that the focal length of second lens is f2, and the focal length of the 4th lens is f4, and meets following bar
Part：0.55<f2/f4<4.0.
8. wide-angle image lens set as claimed in claim 1, it is characterised in that the synthesis focal length of second lens and the 3rd lens is f23, the focal length of the 4th lens is
F4, and meet following condition：-1.3<f23/f4<-0.6.
9. wide-angle image lens set as claimed in claim 1, it is characterised in that the synthesis focal length of first lens and the second lens is f12, the 3rd lens and the 4th saturating
The synthesis focal length of mirror is f34, and meets following condition：0.3<f12/f34<2.2.
10. wide-angle image lens set as claimed in claim 1, it is characterised in that the whole focal length of the wide-angle image lens set is f, the thing side surfaces of first lens into
Image planes are TL in the distance on optical axis, and meet following condition：0.5<f/TL<0.8.
11. wide-angle image lens set as claimed in claim 1, it is characterised in that the maximum field of view angle of the wide-angle image lens set is FOV, and meets following condition：75<
FOV<95。
12. wide-angle image lens set as claimed in claim 1, it is characterised in that second lens are CT2 in the thickness on optical axis, first lens are in the thickness on optical axis
CT1, and meet following condition：0.2<CT2/CT1<0.7.
13. wide-angle image lens set as claimed in claim 1, it is characterised in that first lens and the second lens are T12, second lens in the spacing distance on optical axis
It is CT2 in the thickness on optical axis, and meets following condition：0.05<T12/CT2<1.25.
14. wide-angle image lens set as claimed in claim 1, it is characterised in that the image side surface curvature radius of first lens is R2, the thing side surface of second lens
Radius of curvature is R3, and meets following condition：0.01<R2/R3<4.3.
15. wide-angle image lens set as claimed in claim 1, it is characterised in that the abbe number of first lens is V1, and the abbe number of second lens is V2, and
Meet following condition：30<V1-V2<42.
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