CN106980167A - Imaging lens group - Google Patents
Imaging lens group Download PDFInfo
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- CN106980167A CN106980167A CN201610025652.XA CN201610025652A CN106980167A CN 106980167 A CN106980167 A CN 106980167A CN 201610025652 A CN201610025652 A CN 201610025652A CN 106980167 A CN106980167 A CN 106980167A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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Abstract
The present invention is a kind of imaging lens group, 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 refracting power；One the 4th lens, with positive refracting power；One the 5th lens, with negative refracting power；Wherein the synthesis focal length of second lens, the 3rd lens and the 4th lens is f234, and the focal length of the 5th lens is f5, and meets following condition：-1.8<f234/f5<-1.0；Use and reach a kind of the appropriately configured of refracting power, help to reduce spherical aberration, five chip imaging lens groups of the generation of astigmatism.
Description
Technical field
The present invention is relevant with imaging lens group, particularly relate to a kind of chip of miniaturization five applied on electronic product into
As lens set.
Background technology
The miniature photography camera lens of high image quality has been that the standard of current various running gears is equipped with, and be made with semiconductor
It is progressive so that the picture element area on electronics photosensory assembly more comes smaller, and then cause pick-up lens to need finer parsing
Power, so as to which finer image quality can be presented.
It is known to be equipped on running gear, such as mobile phone, tablet PC, 3 to 4 with other wearable electronic installations etc.
The small-sized camera lens of chip, such as US 7,564,635, US 7,920,340, and finer image quality can not be presented；And five chips is small
Type camera lens, perhaps can there is preferably image quality, but in large aperture, such as US 8, and 605,368, US8,649,113, TW application numbers
102137030th, 102121155, often the Release Sensitivity Problem easily with manufacture assembling, is difficult volume production, increases the cost of volume production.
Or be reduction assembling tolerance, have no alternative but sacrifice the image quality on periphery, make image blur or the deformation on periphery.
So, Persisting exploitation goes out a kind of high image quality camera lens for having high analytic ability and possessing low manufacture assembling tolerance, i.e.,
It is the motivation that the present invention is researched and developed.
The content of the invention
It is an object of the invention to provide a kind of imaging lens group, espespecially a kind of tool is high to draw number, high analytic ability, low distortion
Deformation and five chip imaging lens groups of low manufacture assembling tolerance sensitivity.
In order to reach object defined above, according to a kind of imaging lens group provided by the present invention, sequentially wrapped by thing side to image side
Contain：One aperture；One first lens, are at convex surface, its image side surface dipped beam axle at its thing side surface dipped beam axle with positive refracting power
For convex surface, its thing side surface is aspherical with an image side surface at least surface；One second lens, with negative refracting power, its thing side
It is convex surface at the dipped beam axle of surface, its thing side surface is aspherical with an image side surface at least surface；One the 3rd lens, with flexion
It is concave surface at power, its image side surface dipped beam axle, its thing side surface is aspherical with an image side surface at least surface；One the 4th is saturating
Mirror, with positive refracting power, it is convex surface, its thing side surface at concave surface, its image side surface dipped beam axle to be at its thing side surface dipped beam axle
It is aspherical with an image side surface at least surface；One the 5th lens, are recessed at its thing side surface dipped beam axle with negative refracting power
It is concave surface at face, its image side surface dipped beam axle, its thing side surface is aspherical, its thing side surface with an image side surface at least surface
And an image side surface at least surface has an at least point of inflexion；
Wherein the synthesis focal length of second lens, the 3rd lens and the 4th lens is f234, and the focal length of the 5th lens is
F5, and meet following condition：-1.8<f234/f5<-1.0.By the appropriately configured of refracting power, help to reduce spherical aberration, astigmatism
Generation.
It is preferred that being convex surface at the thing side surface dipped beam axle of second lens, at the dipped beam axle of image side surface being concave surface；This
It is convex surface at the thing side surface dipped beam axle of three lens, at the dipped beam axle of image side surface is concave surface.
It is preferred that the focal length of first lens is f1, the focal length of second lens is f2, and meets following condition：-0.75
<f1/f2<-0.4.Thereby, make the refracting power configuration of first lens and second lens more suitable, can be conducive to obtaining wide
General picture angle (angle of visual field) and the excessive increase of reduction system aberration.
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：-2.6<
f2/f4<-1.8.Thereby, be conducive to being lifted big visual angle, the large aperture characteristic of imaging lens group, and its susceptibility can be reduced, favorably
In the making of each lens, and improve production yield.
It is preferred that the focal length of the 4th lens is f4, the focal length of the 5th lens is f5, and meets following condition：-1.35
<f4/f5<-0.9.Thereby, it can effectively shorten the back focal length of imaging lens group, maintain it to minimize.
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：-0.1<
f1/f3<0.15.Thereby, the flexion dynamic balance of imaging lens group can be maintained, and then reaches optimal imaging effect.
It is preferred that the focal length of second lens is f2, the focal length of the 5th lens is f5, and meets following condition：1.8<
f2/f5<3.1.Thereby, contribute to the overall length of shortening imaging lens group, and maintain it to minimize.
It is preferred that the focal length of first lens is f1, the focal length of the 4th lens is f4, and meets following condition：0.9<
f1/f4<1.5.Thereby, the flexion dynamic balance of imaging lens group can be maintained, and then reaches optimal imaging effect.
It is preferred that the focal length of first lens is f1, the synthesis focal length of second lens and the 3rd lens is f23, and completely
Foot row condition：-0.7<f1/f23<-0.5.Thereby, the flexion dynamic balance of imaging lens group can be maintained, so reach it is optimal into
As effect.
It is preferred that the synthesis focal length of second lens and the 3rd lens is f23, the synthesis of the 4th lens and the 5th lens
Focal length is f45, and meets following condition：-0.35<f23/f45<-0.05.When f23/f45 meets foregoing relationships, then this can be made
Imaging lens group is possessing big picture angle, high picture number and low camera lens height, while resolving power is obviously improved, if conversely, beyond upper
The data value range of optical profile type is stated, then the performance of imaging lens group, resolving power can be caused low, and the problems such as yield deficiency.
It is preferred that the synthesis focal length of first lens and the second lens is f12, the synthesis of the 3rd lens and the 4th lens
Focal length is f34, and meets following condition：1.4<f12/f34<2.8.When f12/f34 meets foregoing relationships, then the imaging can be made
Lens set is possessing big picture angle, high picture number and low camera lens height, while resolving power is obviously improved, if conversely, beyond above-mentioned light
The data value range of formula, then can cause the performance of imaging lens group, resolving power low, and the problems such as yield deficiency.
It is preferred that the synthesis focal length of the 3rd lens and the 4th lens is f34, the focal length of the 5th lens is f5, and completely
Foot row condition：-1.4<f34/f5<-0.9.When f34/f5 meets foregoing relationships, then the imaging lens group can be made to possess
It is big to draw angle, high picture number and low camera lens height, while resolving power is obviously improved, if conversely, beyond the data value of above-mentioned optical profile type
Scope, then can cause the performance of imaging lens group, resolving power low, and the problems such as yield deficiency.
It is preferred that the focal length of first lens is f1, second lens, the synthesis focal length of the 3rd lens and the 4th lens are
F234, and meet following condition：0.6<f1/f234<1.5.By the appropriately configured of refracting power, help to reduce spherical aberration, astigmatism
Generation.
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 completely
Foot row condition：-2.3<f23/f4<-1.5.Thereby, be conducive to being lifted big visual angle, the large aperture characteristic of imaging lens group, and can
Its susceptibility is reduced, is conducive to the making of each lens, and improves production yield.
It is preferred that the synthesis focal length of first lens, the second lens and the 3rd lens is f123, the focal length of the 4th lens
For f4, and meet following condition：1.6<f123/f4<2.7.By the appropriately configured of refracting power, help to reduce spherical aberration, astigmatism
Generation.
It is preferred that the synthesis focal length of first lens, the second lens and the 3rd lens is f123, the 4th lens and the 5th
The synthesis focal length of lens is f45, and meets following condition：0.05<f123/f45<0.4.By the appropriately configured of refracting power, have
Help reduce spherical aberration, the generation of astigmatism.
It is preferred that the abbe number of first lens is V1, the abbe number of second lens is V2, and meets following bar
Part：30<V1-V2<42.Thereby, the aberration of the imaging lens group can be corrected.
It is preferred that the abbe number of the 4th lens is V4, the abbe number of the 3rd lens is V3, and meets following bar
Part：30<V4-V3<42.Thereby, the aberration of the imaging lens group can be corrected.
It is preferred that the whole focal length of the imaging lens group is f, the thing side surfaces of first lens is to imaging surface on optical axis
Distance be TL, and meet following condition：0.6<f/TL<0.95.Thereby, can be conducive to obtaining it is extensive draw angle (angle of visual field) and
Be conducive to maintaining the miniaturization of the imaging lens group, to be equipped on frivolous electronic product.
The relevant present invention is reaches above-mentioned purpose, and technology, means and the other effects used hereby lifts three preferably feasible
Embodiment simultaneously coordinates schema to describe in detail as after.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, simple is made to the accompanying drawing used required for the present invention below
Introduce, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ordinary skill people
For member, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Figure 1A is the schematic diagram of the imaging lens group of first embodiment of the invention.
Figure 1B is sequentially spherical aberration, astigmatism and the distortion curve map of the imaging lens group of first embodiment from left to right.
Fig. 2A is the schematic diagram of the imaging lens group of second embodiment of the invention.
Fig. 2 B are sequentially spherical aberration, astigmatism and the distortion curve map of the imaging lens group of second embodiment from left to right.
Fig. 3 A are the schematic diagrames of the imaging lens group of third embodiment of the invention.
Fig. 3 B are sequentially spherical aberration, astigmatism and the distortion curve map of the imaging lens group of 3rd embodiment from left to right.
Description of reference numerals
100、200、300：Aperture
110、210、310：First lens 120,220,320：Second lens
130、230、330：3rd lens 140,240,340：4th lens
150、250、350：5th lens 170,270,370：Infrared ray filters out filtering assembly
180、280、380：Imaging surface 190,290,390：Optical axis
f：The focal length Fno of imaging lens group：The f-number of imaging lens group
FOV：Imaging lens Zu Zhong maximums field of view angle f1：The focal length of first lens
f2：The focal length f3 of second lens：The focal length of 3rd lens
f4：The focal length f5 of 4th lens：The focal length of 5th lens
f12：The synthesis focal length f23 of first lens and the second lens：The synthesis focal length of second lens and the 3rd lens
f34：The synthesis focal length f45 of 3rd lens and the 4th lens：The synthesis focal length of 4th lens and the 5th lens
V1：The abbe number V2 of first lens：The abbe number of second lens
V3：The abbe number V4 of 3rd lens：The abbe number of 4th lens
f123：The synthesis focal length of first lens, the second lens and the 3rd lens
f234：The synthesis focal length of second lens, the 3rd lens and the 4th lens
TL：The thing side surface of first lens is to imaging surface in the distance on optical axis
111、211、311、121、221、321、131、231、331、141、241、341、151、251、351：Thing side surface
112、212、312、122、222、322、132、232、332、142、242、342、152、252、352：Image side surface
Embodiment
<First embodiment>
Figure 1A and Figure 1B is refer to, wherein Figure 1A illustrates the signal of the imaging lens group according to first embodiment of the invention
Figure, Figure 1B is sequentially spherical aberration, astigmatism and the distortion curve map of the imaging lens group of first embodiment from left to right.Can by Figure 1A
Know, imaging lens system includes an aperture 100 and an optics group, the optics group sequentially includes the first lens by thing side to image side
110th, the second lens 120, the 3rd lens 130, the 4th lens 140, the 5th lens 150, infrared ray filter out filtering assembly 170, with
And imaging surface 180, the lens for having refracting power wherein in the imaging lens group are five.The aperture 100 is arranged on first lens
Between 110 image side surface 112 and object.
First lens 110 have positive refracting power, and are to be convex at plastic material, its dipped beam axle 190 of thing side surface 111
It is convex surface at face, its dipped beam axle 190 of image side surface 112, and the thing side surface 111 and image side surface 112 are all aspherical.
Second lens 120 have negative refracting power, and are to be convex at plastic material, its dipped beam axle 190 of thing side surface 121
It is concave surface at face, its dipped beam axle 190 of image side surface 122, and the thing side surface 121 and image side surface 122 are all aspherical.
3rd lens 130 have negative refracting power, and are to be convex at plastic material, its dipped beam axle 190 of thing side surface 131
It is concave surface at face, its dipped beam axle 190 of image side surface 132, and the thing side surface 131 and image side surface 132 are all aspherical.
4th lens 140 have positive refracting power, and are to be recessed at plastic material, its dipped beam axle 190 of thing side surface 141
It is convex surface at face, its dipped beam axle 190 of image side surface 142, and the thing side surface 141 and image side surface 142 are all aspherical.
5th lens 150 have negative refracting power, and are to be recessed at plastic material, its dipped beam axle 190 of thing side surface 151
It is concave surface at face, its dipped beam axle 190 of image side surface 152, and the thing side surface 151 and image side surface 152 are all aspherical, and should
Thing side surface 151 and a image side surface 152 at least surface have an at least point of inflexion.
The infrared ray filters out filtering assembly 170 for glass material, and it is arranged between the 5th lens 150 and imaging surface 180
And do not influence the focal length of the imaging lens group.
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 lens measure
Face close to optical axis 190 curvature, and for radius of curvature (R) inverse (c=1/R), R be lens surface close to optical axis 190 song
Rate radius, h is vertical range of the lens surface apart from optical axis 190, and k is circular cone coefficient (conic constant), and A, B, C,
D, E, G ... be order aspherical coefficients.
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, imaging lens Zu Zhong maximums field of view angle is FOV, and its numerical value is as follows：F=3.710 (millimetre)；Fno=2.0；
And FOV=78 (degree).
In the imaging lens group of first embodiment, first lens 110 be f1, second lens 120 be f2, and meet under
Row condition：F1/f2=-0.5210.
In the imaging lens group of first embodiment, second lens 120 be f2, the 4th lens 140 be f4, and meet under
Row condition：F2/f4=-2.0249.
In the imaging lens group of first embodiment, the 4th lens 140 be f4, the 5th lens 150 be f5, and meet under
Row condition：F4/f5=-1.1917.
In the imaging lens group of first embodiment, first lens 110 be f1, the 3rd lens 130 be f3, and meet under
Row condition：F1/f3=-0.0860.
In the imaging lens group of first embodiment, second lens 120 be f2, the 5th lens 150 be f5, and meet under
Row condition：F2/f5=2.4131.
In the imaging lens group of first embodiment, first lens 110 be f1, the 4th lens 140 be f4, and meet under
Row condition：F1/f4=1.0549.
In the imaging lens group of first embodiment, first lens 110 are f1, the lens 130 of the second lens 120 and the 3rd
Synthesis focal length be f23, and meet following condition：F1/f23=-0.6159.
In the imaging lens group of first embodiment, the synthesis focal length of the lens 130 of the second lens 120 and the 3rd is f23, should
The synthesis focal length of 4th lens 140 and the 5th lens 150 is f45, and meets following condition：F23/f45=-0.0622.
In the imaging lens group of first embodiment, the synthesis focal length of the lens 120 of the first lens 110 and second is f12, should
The synthesis focal length of 3rd lens 130 and the 4th lens 140 is f34, and meets following condition：F12/f34=1.6071.
In the imaging lens group of first embodiment, the synthesis focal length of the 3rd lens 130 and the 4th lens 140 is f34, should
The focal length of 5th lens 150 is f5, and meets following condition：F34/f5=-1.2606.
In the imaging lens group of first embodiment, the focal length of first lens is f1, second lens 120, the 3rd lens
130 and the 4th the synthesis focal lengths of lens 140 be f234, and meet following condition：F1/f234=0.7515.
In the imaging lens group of first embodiment, the conjunction of second lens 120, the 3rd lens 130 and the 4th lens 140
Coking is away from for f234, and the focal length of the 5th lens 150 is f5, and meets following condition：F234/f5=-1.6727.
In the imaging lens group of first embodiment, the synthesis of first lens 110, the second lens 120 and the 3rd lens 130
Focal length is f123, and the focal length of the 4th lens 140 is f4, and meets following condition：F123/f4=1.8554.
In the imaging lens group of first embodiment, the synthesis of first lens 110, the second lens 120 and the 3rd lens 130
Focal length is f123, and the synthesis focal length of the 4th lens 140 and the 5th lens 150 is f45, and meets following condition：f123/f45
=0.0674.
In the imaging lens group of first embodiment, the abbe number of first lens 110 is V1, second lens 120
Abbe number is V2, and meets following condition：V1-V2=34.5.
In the imaging lens group of first embodiment, the abbe number of the 4th lens 140 is V4, the 3rd lens 130
Abbe number is V3, and meets following condition：V4-V3=34.5.
In the imaging lens group of first embodiment, the whole focal length of the imaging lens group is f, the thing of first lens 110
Side surface 111 is TL in the distance on optical axis 190 to imaging surface 180, and meets following condition：F/TL=0.8281.
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 0-15 is sequentially represented by the surface of thing side to image side.Table 2 is the aspherical surface data in first embodiment, wherein, k tables are non-
Conical surface coefficient in spherical curve equation, A, B, C, D, E, F ... be order aspherical coefficients.In addition, following embodiment
Form be data in the schematic diagram and aberration curve figure of each embodiment of correspondence, form definition all with the table 1 of first embodiment and
The definition of table 2 is identical, is not added with repeating herein.
<Second embodiment>
Fig. 2A and Fig. 2 B are refer to, wherein Fig. 2A illustrates the signal of the imaging lens group according to second embodiment of the invention
Figure, Fig. 2 B are sequentially spherical aberration, astigmatism and the distortion curve map of the imaging lens group of second embodiment from left to right.Can by Fig. 2A
Know, imaging lens group is to include an aperture 200 and an optics group, the optics group sequentially includes the first lens by thing side to image side
210th, the second lens 220, the 3rd lens 230, the 4th lens 240, the 5th lens 250, infrared ray filter out filtering assembly 270, with
And imaging surface 280, the lens for having refracting power wherein in the imaging lens group are five.The aperture 200 is arranged on first lens
Between 210 image side surface 212 and object.
First lens 210 have positive refracting power, and are to be convex at plastic material, its dipped beam axle 290 of thing side surface 211
It is convex surface at face, its dipped beam axle 290 of image side surface 212, and the thing side surface 211 and image side surface 212 are all aspherical.
Second lens 220 have negative refracting power, and are to be convex at plastic material, its dipped beam axle 290 of thing side surface 221
It is concave surface at face, its dipped beam axle 290 of image side surface 222, and the thing side surface 221 and image side surface 222 are all aspherical.
3rd lens 230 have negative refracting power, and are to be convex at plastic material, its dipped beam axle 290 of thing side surface 231
It is concave surface at face, its dipped beam axle 290 of image side surface 232, and the thing side surface 231 and image side surface 232 are all aspherical.
4th lens 240 have positive refracting power, and are to be recessed at plastic material, its dipped beam axle 290 of thing side surface 241
It is convex surface at face, its dipped beam axle 290 of image side surface 242, and the thing side surface 241 and image side surface 242 are all aspherical.
5th lens 250 have negative refracting power, and are to be recessed at plastic material, its dipped beam axle 290 of thing side surface 251
It is concave surface at face, its dipped beam axle 290 of image side surface 252, and the thing side surface 251 and image side surface 252 are all aspherical, and should
Thing side surface 251 and a image side surface 252 at least surface have an at least point of inflexion.
The infrared ray filters out filtering assembly 270 for glass material, and it is arranged between the 5th lens 250 and imaging surface 280
And do not influence the focal length of the imaging lens group.
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, following table parameter
Definition is all identical with first embodiment, and 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 signal of the imaging lens group according to third embodiment of the invention
Figure, Fig. 3 B are sequentially spherical aberration, astigmatism and the distortion curve map of the imaging lens group of 3rd embodiment from left to right.Can by Fig. 3 A
Know, imaging lens group is to include an aperture 300 and an optics group, the optics group sequentially includes the first lens by thing side to image side
310th, the second lens 320, the 3rd lens 330, the 4th lens 340, the 5th lens 350, infrared ray filter out filtering assembly 370, with
And imaging surface 380, the lens for having refracting power wherein in the imaging lens group are five.The aperture 300 is arranged on first lens
Between 310 image side surface 312 and object.
First lens 310 have positive refracting power, and are to be convex at plastic material, its dipped beam axle 390 of thing side surface 311
It is convex surface at face, its dipped beam axle 390 of image side surface 312, and the thing side surface 311 and image side surface 312 are all aspherical.
Second lens 320 have negative refracting power, and are to be convex at plastic material, its dipped beam axle 390 of thing side surface 321
It is concave surface at face, its dipped beam axle 390 of image side surface 322, and the thing side surface 321 and image side surface 322 are all aspherical.
3rd lens 330 have positive refracting power, and are to be convex at plastic material, its dipped beam axle 390 of thing side surface 331
It is concave surface at face, its dipped beam axle 390 of image side surface 332, and the thing side surface 331 and image side surface 332 are all aspherical.
4th lens 340 have positive refracting power, and are to be recessed at plastic material, its dipped beam axle 390 of thing side surface 341
It is convex surface at face, its dipped beam axle 390 of image side surface 342, and the thing side surface 341 and image side surface 342 are all aspherical.
5th lens 350 have negative refracting power, and are to be recessed at plastic material, its dipped beam axle 390 of thing side surface 351
It is concave surface at face, its dipped beam axle 390 of image side surface 352, and the thing side surface 351 and image side surface 352 are all aspherical, and should
Thing side surface 351 has an at least point of inflexion with a image side surface 352 at least surface.
The infrared ray filters out filtering assembly 370 for glass material, and it is arranged between the 5th lens 350 and imaging surface 380
And do not influence the focal length of the imaging lens group.
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, following table parameter
Definition is all identical with first embodiment, and not in this to go forth.
Cooperation table 5 and table 6 can extrapolate following data：
The imaging lens group that the present invention is provided, the materials of lens can be plastics or glass, when lens material is plastics, can be with
Effectively reduction production cost, another when the material of lens is glass, then can be added to as the free degree of lens set refracting power configuration.
In addition, the thing side surface and image side surface of lens can be aspherical to be easily fabricated to sphere to be aspherical in imaging lens group
Shape in addition, obtains more control variable, to cut down aberration, and then reduces the number that lens are used, therefore can have
The total length of effect reduction imaging lens group of the present invention.
In the imaging lens group 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, then it represents that the lens surface is convex surface at dipped beam axle；If lens surface is not for concave surface and not
When defining the concave surface position, then it represents that the lens surface is concave surface at dipped beam axle.
The more visual demand of imaging lens group that the present invention is provided is applied in the optical system of mobile focusing, and is had concurrently excellent
Lens error correction and the characteristic of good image quality, many-sided can be applied to 3D (three-dimensional) image capture, digital camera, action dress
Put, in the electronic image system such as 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
The scope that the present invention is implemented, i.e., the equivalent changes and modifications made generally according to scope of the present invention patent should all belong to the present invention
In the range of patent covers.
Claims (19)
1. a kind of imaging lens group, it is characterised in that sequentially included by thing side to image side：
One aperture；
One first lens, are to be convex at convex surface, its image side surface dipped beam axle with positive refracting power, at its thing side surface dipped beam axle
Face, its thing side surface is aspherical with an image side surface at least surface；
One second lens, are convex surface at its thing side surface dipped beam axle, its thing side surface and image side surface are at least with negative refracting power
One surface is aspherical；
One the 3rd lens, are concave surface, its thing side surface and image side surface at least one with refracting power, at its image side surface dipped beam axle
Surface is aspherical；
One the 4th lens, are to be convex at concave surface, its image side surface dipped beam axle with positive refracting power, at its thing side surface dipped beam axle
Face, its thing side surface is aspherical with an image side surface at least surface；
One the 5th lens, are to be recessed at concave surface, its image side surface dipped beam axle with negative refracting power, at its thing side surface dipped beam axle
Face, its thing side surface is aspherical with an image side surface at least surface, and its thing side surface and an image side surface at least surface have
An at least point of inflexion；
Wherein, the synthesis focal length of second lens, the 3rd lens and the 4th lens is f234, and the focal length of the 5th lens is f5,
And meet following condition：-1.8<f234/f5<-1.0.
2. imaging lens group as claimed in claim 1, it is characterised in that to be convex at the thing side surface dipped beam axle of second lens
It is concave surface at face, image side surface dipped beam axle；For convex surface, at the dipped beam axle of image side surface at the thing side surface dipped beam axle of 3rd lens
For concave surface.
3. imaging lens group as claimed in claim 1, it is characterised in that the focal length of first lens is f1, second lens
Focal length be f2, and meet following condition：-0.75<f1/f2<-0.4.
4. imaging lens group as claimed in claim 1, it is characterised in that the focal length of second lens is f2, the 4th lens
Focal length be f4, and meet following condition：-2.6<f2/f4<-1.8.
5. imaging lens group as claimed in claim 1, it is characterised in that the focal length of the 4th lens is f4, the 5th lens
Focal length be f5, and meet following condition：-1.35<f4/f5<-0.9.
6. imaging lens group as claimed in claim 1, it is characterised in that the focal length of first lens is f1, the 3rd lens
Focal length be f3, and meet following condition：-0.1<f1/f3<0.15.
7. imaging lens group as claimed in claim 1, it is characterised in that the focal length of second lens is f2, the 5th lens
Focal length be f5, and meet following condition：1.8<f2/f5<3.1.
8. imaging lens group as claimed in claim 1, it is characterised in that the focal length of first lens is f1, the 4th lens
Focal length be f4, and meet following condition：0.9<f1/f4<1.5.
9. imaging lens group as claimed in claim 1, it is characterised in that the focal length of first lens is f1, second lens
Synthesis focal length with the 3rd lens is f23, and meets following condition：-0.7<f1/f23<-0.5.
10. imaging lens group as claimed in claim 1, it is characterised in that the synthesis focal length of second lens and the 3rd lens
For f23, the synthesis focal length of the 4th lens and the 5th lens is f45, and meets following condition：-0.35<f23/f45<-0.05.
11. imaging lens group as claimed in claim 1, it is characterised in that the synthesis focal length of first lens and the second lens
For f12, the synthesis focal length of the 3rd lens and the 4th lens is f34, and meets following condition：1.4<f12/f34<2.8.
12. imaging lens group as claimed in claim 1, it is characterised in that the synthesis focal length of the 3rd lens and the 4th lens
For f34, the focal length of the 5th lens is f5, and meets following condition：-1.4<f34/f5<-0.9.
13. imaging lens group as claimed in claim 1, it is characterised in that the focal length of first lens is f1, this is second saturating
The synthesis focal length of mirror, the 3rd lens and the 4th lens is f234, and meets following condition：0.6<f1/f234<1.5.
14. imaging lens group as claimed in claim 1, it is characterised in that the synthesis focal length of second lens and the 3rd lens
For f23, the focal length of the 4th lens is f4, and meets following condition：-2.3<f23/f4<-1.5.
15. imaging lens group as claimed in claim 1, it is characterised in that first lens, the second lens and the 3rd lens
Synthesis focal length is f123, and the focal length of the 4th lens is f4, and meets following condition：1.6<f123/f4<2.7.
16. imaging lens group as claimed in claim 1, it is characterised in that first lens, the second lens and the 3rd lens
Synthesis focal length is f123, and the synthesis focal length of the 4th lens and the 5th lens is f45, and meets following condition：0.05<f123/
f45<0.4。
17. imaging lens group as claimed in claim 1, it is characterised in that the abbe number of first lens is V1, and this second
The abbe number of lens is V2, and meets following condition：30<V1-V2<42.
18. imaging lens group as claimed in claim 1, it is characterised in that the abbe number of the 4th lens is V4, the 3rd
The abbe number of lens is V3, and meets following condition：30<V4-V3<42.
19. imaging lens group as claimed in claim 1, it is characterised in that the whole focal length of the imaging lens group is f, this
The thing side surface of one lens is TL in the distance on optical axis to imaging surface, and meets following condition：0.6<f/TL<0.95.
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| CN201610025652.XA CN106980167B (en) | 2016-01-15 | 2016-01-15 | Imaging lens group |
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| CN201610025652.XA CN106980167B (en) | 2016-01-15 | 2016-01-15 | Imaging lens group |
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| CN106980167B CN106980167B (en) | 2019-07-23 |
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