CN109085694A - Five chip broad angle lens groups - Google Patents
Five chip broad angle lens groups Download PDFInfo
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- CN109085694A CN109085694A CN201710442395.4A CN201710442395A CN109085694A CN 109085694 A CN109085694 A CN 109085694A CN 201710442395 A CN201710442395 A CN 201710442395A CN 109085694 A CN109085694 A CN 109085694A
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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
- G02B13/0045—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 five chip broad angle lens groups, sequentially includes by object side to image side: one first lens have negative refracting power；One aperture；One second lens have positive refracting power；One the third lens have negative refracting power；One the 4th lens have positive refracting power；And one the 5th lens, there is negative refracting power.Whereby, the present invention then provide a kind of promotion picture angle, the high analytic ability of tool, short lens length, small distortion five chip broad angle lens groups.
Description
Technical field
The present invention be it is related with five chip broad angle lens groups, particularly relate to a kind of miniaturization five applied on electronic product
Chip broad angle lens group.
Background technique
With the rise of the electronic product with camera function, the demand of optical system is increasingly improved.In shooting, to obtain
Wider coverage needs the visual angle of camera lens to meet certain requirements, thus the requirement for camera lens shooting angle and image quality
It is increasingly stringenter.The picture angle (field angle FOV) of usual camera lens is designed as 50 degree to 60 degree, if it exceeds the angle designed above,
Not only aberration is larger, and the design of camera lens is also complex.Known US 8335043, US 8,576,497 2 eyeglass groups of use, 5~6
Reach wide-angle purpose, so it is too big to distort (distortion) for it, and such as US 8593737, US 8576497, US
8395853, although can reach wide-angle purpose, the total length (TL) of its lens group is too long.
Therefore how to develop a kind of five chip broad angle lens groups of miniaturization, make in addition to being configurable on digital camera
Except the electronic products such as camera lens or mobile phone camera lens that camera lens, network cameras use, with more larger picture angle, picture is reduced
Effect of difference is the motivation that the present invention researches and develops to reduce the complexity of lens design.
Summary of the invention
The purpose of the present invention is to provide a kind of five chip broad angle lens groups, espespecially a kind of promotion picture angle, the high parsing energy of tool
Power, short lens length, small distortion five chip broad angle lens groups.
Edge is, in order to reach foregoing purpose, according to the present invention provided by a kind of five chip broad angle lens groups, extremely by object side
Image side sequentially includes: one first lens, has negative refracting power, is convex surface, image side surface dipped beam at the dipped beam axis of object side surface
It is concave surface at axis, object side surface is aspherical with an image side surface at least surface；One aperture；One second lens have and just bend
Power is rolled over, is convex surface at the dipped beam axis of object side surface, is convex surface at the dipped beam axis of image side surface, object side surface and image side surface are extremely
A few surface is aspherical；One the third lens have negative refracting power, are convex surface, image side surface at the dipped beam axis of object side surface
It is concave surface at dipped beam axis, object side surface is aspherical with an image side surface at least surface；One the 4th lens have positive flexion
Power is convex surface at the dipped beam axis of object side surface, is convex surface at the dipped beam axis of image side surface, object side surface and image side surface are at least
One surface is aspherical；And one the 5th lens, there is negative refracting power, be concave surface, object side table at the dipped beam axis of image side surface
Face and an image side surface at least surface be it is aspherical, object side surface and an image side surface at least surface have an at least contrary flexure
Point.
Preferably, wherein the focal length of first lens is f1, the focal length of second lens is f2, and meets following condition :-
2.2 < f1/f2 < -1.45.Whereby, make the refracting power configuration of first lens and second lens more appropriate, can be conducive to
Obtain the extensive excessive increase drawn angle (field angle) and reduce system aberration.
Preferably, wherein the focal length of second lens is f2, the focal length of the third lens is f3, and meets following condition :-
0.6 < f2/f3 < -0.3.Whereby, second lens and the refracting power configuration of the third lens are balanced more, facilitate aberration
Amendment and susceptibility reduction.
Preferably, wherein the focal length of the third lens is f3, the focal length of the 4th lens is f4, and meets following condition :-
2.1 < f3/f4 < -1.0.Whereby, it is advantageously ensured that a negative one of the third lens and the 4th lens forming is positive looks in the distance
(Telephoto) structure can effectively reduce system optics total length.
Preferably, wherein the focal length of the 4th lens is f4, the focal length of the 5th lens is f5, and meets following condition :-
1.2 < f4/f5 < -0.7.Whereby, the refracting power of rear group's lens system can be made to configure more to balance, be conducive to system sensitivity
Reduce the correction with higher order aberratons.
Preferably, wherein the focal length of first lens is f1, the focal length of the third lens is f3, and meets following condition:
0.55 < f1/f3 < 1.0.Whereby, the refracting power of the first lens is effectively distributed, the susceptibility of five chip broad angle lens groups is reduced.
Preferably, wherein the focal length of second lens is f2, the focal length of the 4th lens is f4, and meets following condition:
0.4 < f2/f4 < 0.95.Whereby, the negative refracting power distribution of system is more appropriate, is conducive to update the system aberration to improve system
Image quality.
Preferably, wherein the focal length of the third lens is f3, the focal length of the 5th lens is f5, and meets following condition:
1.0 < f3/f5 < 1.8.Whereby, facilitate to shorten the overall length of the five chips broad angle lens group, and maintain its miniaturization.
Preferably, wherein the focal length of first lens is f1, the synthesis focal length of second lens and the third lens is f23,
And meet following condition: -1.5 < f1/f23 < -0.95.Whereby, when f1/f23 meets above-mentioned condition, then five chip can be enabled
Broad angle lens group is while obtaining extensive picture angle (field angle), the significant promotion of resolving power.
Preferably, wherein second lens and the synthesis focal length of the third lens are f23, the 4th lens and the 5th lens
Synthesis focal length is f45, and meets following condition: 0.2 < f23/f45 < 0.8.When f23/f45 meets foregoing relationships, then can enable
The five chips broad angle lens group is having big picture angle, high picture number and low camera lens height, while the significant promotion of resolving power, conversely,
If exceeding the data value range of above-mentioned optical profile type, performance, the resolving power that will lead to the five chips broad angle lens group are low, Yi Jiliang
The problems such as rate is insufficient.
Preferably, wherein the synthesis focal length of first lens and the second lens is f12, the third lens and the 4th lens
Synthesis focal length is f34, and meets following condition: 0.15 < f12/f34 < 0.75.Whereby, extensive picture angle can be help to obtain
(field angle) and effectively correct curvature of the image.
Preferably, wherein the synthesis focal length of the third lens and the 4th lens is f34, the focal length of the 5th lens is f5,
And meet following condition: -2.6 < f34/f5 < -1.2.When f34/f5 meets foregoing relationships, then the five chips wide-angle lens can be enabled
Piece group is having big picture angle, high picture number and low camera lens height, while the significant promotion of resolving power, conversely, if exceeding above-mentioned optics
The data value range of formula then will lead to the performance of the five chips broad angle lens group, the problems such as resolving power is low and yield is insufficient.
Preferably, wherein the focal length of first lens is f1, the synthesis of second lens, the third lens and the 4th lens is burnt
Away from for f234, and meet following condition: -2.4 < f1/f234 < -1.3.By the appropriately configured of refracting power, help to reduce ball
The generation of difference, astigmatism.
Preferably, wherein the synthesis focal length of second lens, the third lens and the 4th lens is f234, the 5th lens
Focal length is f5, and meets following condition: -0.8 < f234/f5 < -0.35.By the appropriately configured of refracting power, help to reduce
The generation of spherical aberration, astigmatism.
Preferably, wherein the synthesis focal length of first lens, the second lens and the third lens is f123, the 4th lens
Focal length is f4, and meets following condition: 1.65 < f123/f4 < 3.0.By the appropriately configured of refracting power, help to reduce ball
The generation of difference, astigmatism.
Preferably, wherein the synthesis focal length of first lens, the second lens and the third lens be f123, the 4th lens with
The synthesis focal length of 5th lens is f45, and meets following condition: 0.65 < f123/f45 < 1.8.By suitably matching for refracting power
It sets, facilitates the generation for reducing spherical aberration, astigmatism.
Preferably, wherein the abbe number of second lens is V2, the abbe number of the third lens is V3, and under satisfaction
Column condition: 30 < V2-V3 < 42.Whereby, the color difference of five chip broad angle lens groups is effectively reduced.
Preferably, wherein the abbe number of the 4th lens is V4, the abbe number of the 5th lens is V5, and under satisfaction
Column condition: 30 < V4-V5 < 42.Whereby, the color difference of five chip broad angle lens groups is effectively reduced.
Preferably, wherein the whole focal length of the five chips broad angle lens group is f, the object side surface of first lens is extremely imaged
Face is TL in the distance on optical axis, and meets following condition: 0.25 < f/TL < 0.6.Whereby, extensive picture can be help to obtain
Angle (field angle) and the miniaturization for being conducive to maintain the five chips broad angle lens group, to be equipped on frivolous electronic product.
Preferably, wherein the focal length of first lens is f1, second lens, the third lens, the 4th lens and the 5th are thoroughly
The synthesis focal length of mirror is f2345, and meets following condition: -2.7 < f1/f2345 < -1.6.Whereby, before f1/f2345 satisfaction
Relational expression is stated, then the five chips broad angle lens group can be enabled to have big picture angle, while the significant promotion of resolving power, conversely, if super
The data value range of above-mentioned optical profile type out, then will lead to that the performance of the five chips broad angle lens group, resolving power be low and yield not
The problems such as sufficient.
It is related the present invention to reach above-mentioned purpose, used technology, means and other the effect of, hereby lift three preferably it is feasible
Embodiment simultaneously cooperates schema detailed description is as follows.
Detailed description of the invention
Figure 1A is the schematic diagram of five chip broad angle lens groups of first embodiment of the invention.
Figure 1B is sequentially the curvature of the image and distortion astigmat song of five chip broad angle lens groups of first embodiment from left to right
Line chart.
Fig. 2A is the schematic diagram of five chip broad angle lens groups of second embodiment of the invention.
Fig. 2 B is sequentially the curvature of the image and distortion astigmat song of five chip broad angle lens groups of second embodiment from left to right
Line chart.
Fig. 3 A is the schematic diagram of five chip broad angle lens groups of third embodiment of the invention.
Fig. 3 B is sequentially the curvature of the image and distortion astigmat song of five chip broad angle lens groups of 3rd embodiment from left to right
Line chart.
Description of symbols in figure:
100,200,300: aperture
110,210,310: the first lens
111,211,311: object side surface
112,212,312: image side surface
120,220,320: the second lens
121,221,321: object side surface
122,222,322: image side surface
130,230,330: the third lens
131,231,331: object side surface
132,232,332: image side surface
140,240,340: the four lens
141,241,341: object side surface
142,242,342: image side surface
150,250,350: the five lens
151,251,351: object side surface
152,252,352: image side surface
170,270,370: infrared ray filters out filtering assembly
180,280,380: imaging surface
190,290,390: optical axis
The focal length of f: five chip broad angle lens groups
The f-number of Fno: five chip broad angle lens groups
FOV: five chip broad angle lens Zu Zhong maximum field of view angles
The focal length of f1: the first lens
The focal length of f2: the second lens
F3: the focal length of the third lens
The focal length of f4: the four lens
The focal length of f5: the five lens
The synthesis focal length of f12: the first lens and the second lens
The synthesis focal length of f23: the second lens and the third lens
F34: the synthesis focal length of the third lens and the 4th lens
The synthesis focal length of f45: the four lens and the 5th lens
The synthesis focal length of f123: the first lens, the second lens and the third lens
The synthesis focal length of f234: the second lens, the third lens and the 4th lens
F2345: the second lens, the third lens, the 4th lens and the 5th lens synthesis focal length
The abbe number of V2: the second lens
V3: the abbe number of the third lens
The abbe number of V4: the four lens
The abbe number of V5: the five lens
The object side surface of TL: the first lens is to imaging surface in the distance on optical axis
Specific embodiment
<first embodiment>
Figure 1A and Figure 1B is please referred to, wherein Figure 1A is painted five chip broad angle lens groups according to first embodiment of the invention
Schematic diagram, Figure 1B are sequentially the curvature of the image and distortion astigmat curve of five chip broad angle lens groups of first embodiment from left to right
Figure.By Figure 1A it is found that five chip broad angle lens systems include an aperture 100 and an optics group, the optics group is by object side to picture
Side sequentially includes the first lens 110, the second lens 120, the third lens 130, the 4th lens 140, the 5th lens 150, infrared ray
Filtering assembly 170 and imaging surface 180 are filtered out, the lens for wherein having refracting power in the five chips broad angle lens group are five.It should
Aperture 100 is arranged between the image side surface 112 of first lens 110 and the image side surface 122 of second lens 120.
First lens 110 have negative refracting power, and are plastic material, are convex at 111 dipped beam axis 190 of object side surface
Face is concave surface at 112 dipped beam axis 190 of image side surface, and the object side surface 111 and image side surface 112 are all aspherical.
Second lens 120 have positive refracting power, and are plastic material, are convex at 121 dipped beam axis 190 of object side surface
Face is convex surface at 122 dipped beam axis 190 of image side surface, and the object side surface 121 and image side surface 122 are all aspherical.
The third lens 130 have negative refracting power, and are plastic material, are convex at 131 dipped beam axis 190 of object side surface
Face is concave surface at 132 dipped beam axis 190 of image side surface, and the object side surface 131 and image side surface 132 are all aspherical.
4th lens 140 have positive refracting power, and are plastic material, are convex at 141 dipped beam axis 190 of object side surface
Face is convex surface at 142 dipped beam axis 190 of image side surface, and the object side surface 141 and image side surface 142 are all aspherical.
5th lens 150 have negative refracting power, and are plastic material, are convex at 151 dipped beam axis 190 of object side surface
Face is concave surface at 152 dipped beam axis 190 of image side surface, and the object side surface 151 and image side surface 152 are all aspherical, and should
Object side surface 151 and a image side surface 152 at least surface have an at least point of inflexion.
It is glass material that the infrared ray, which filters out filtering assembly 170, is set between the 5th lens 150 and imaging surface 180
And do not influence the focal length of the five chips broad angle lens group.
The aspherical fitting equation of above-mentioned each lens is expressed as follows:
Wherein z is along 190 direction of optical axis in the positional value that be highly the position of h make to refer to surface vertices；C is lens measure
Face close to optical axis 190 curvature, and be radius of curvature (R) inverse (c=1/R), R be lens surface close to optical axis 190 song
Rate radius, h are 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 five chip broad angle lens groups of first embodiment, the focal length of five chip broad angle lens groups is f, five chip wide-angle lens
The f-number (f-number) of piece group is Fno, and five chip broad angle lens Zu Zhong maximum field of view angles (drawing angle) is FOV, and numerical value is such as
Under: f=1.920 (millimetre)；Fno=2.2；And FOV=120 (degree).
In five chip broad angle lens groups of first embodiment, the focal length of first lens 110 is f1, second lens 120
Focal length be f2, and meet following condition: f1/f2=-1.684.
In five chip broad angle lens groups of first embodiment, the focal length of second lens 120 is f2, the third lens 130
Focal length be f3, and meet following condition: f2/f3=-0.457.
In five chip broad angle lens groups of first embodiment, the focal length of the third lens 130 is f3, the 4th lens 140
Focal length be f4, and meet following condition: f3/f4=-1.342.
In five chip broad angle lens groups of first embodiment, the focal length of the 4th lens 140 is f4, the 5th lens 150
Focal length be f5, and meet following condition: f4/f5=-0.894.
In five chip broad angle lens groups of first embodiment, the focal length of first lens 110 is f1, the third lens 130
Focal length be f3, and meet following condition: f1/f3=0.770.
In five chip broad angle lens groups of first embodiment, the focal length of second lens 120 is f2, the 4th lens 140
Focal length be f4, and meet following condition: f2/f4=0.613.
In five chip broad angle lens groups of first embodiment, the focal length of the third lens 130 is f3, the 5th lens 150
Focal length be f5, and meet following condition: f3/f5=1.201.
In five chip broad angle lens groups of first embodiment, the focal length of first lens 110 is f1, second lens 120
Synthesis focal length with the third lens 130 is f23, and meets following condition: f1/f23=-1.186.
In five chip broad angle lens groups of first embodiment, second lens 120 and the synthesis focal length of the third lens 130 are
The synthesis focal length of f23, the 4th lens 140 and the 5th lens 150 is f45, and meets following condition: f23/f45=0.441.
In five chip broad angle lens groups of first embodiment, the synthesis focal length of first lens 110 and the second lens 120 is
The synthesis focal length of f12, the third lens 130 and the 4th lens 140 is f34, and meets following condition: f12/f34=0.290.
In five chip broad angle lens groups of first embodiment, the third lens 130 and the synthesis focal length of the 4th lens 140 are
The focal length of f34, the 5th lens 150 are f5, and meet following condition: f34/f5=-2.284.
In five chip broad angle lens groups of first embodiment, the focal lengths of first lens is f1, second lens 120, the
The synthesis focal length of three lens 130 and the 4th lens 140 is f234, and meets following condition: f1/f234=-1.638.
In five chip broad angle lens groups of first embodiment, second lens 120, the third lens 130 and the 4th lens 140
Synthesis focal length be f234, the focal lengths of the 5th lens 150 is f5, and meets following condition: f234/f5=-0.564.
In five chip broad angle lens groups of first embodiment, first lens 110, the second lens 120 and the third lens 130
Synthesis focal length be f123, the focal lengths of the 4th lens 140 is f4, and meets following condition: f123/f4=1.969.
In five chip broad angle lens groups of first embodiment, first lens 110, the second lens 120 and the third lens 130
Synthesis focal length be f123, the synthesis focal length of the 4th lens 140 and the 5th lens 150 is f45, and meets following condition:
F123/f45=0.996.
In five chip broad angle lens groups of first embodiment, the focal lengths of first lens 110 is f1, second lens 120,
The synthesis focal length of the third lens 130, the 4th lens 140 and the 5th lens 150 is f2345, and meets following condition: f1/f2345
=-1.889.
In five chip broad angle lens groups of first embodiment, the abbe number of second lens 120 is V2, the third lens
130 abbe number is V3, and meets following condition: V2-V3=34.60.
In five chip broad angle lens groups of first embodiment, the abbe number of the 4th lens 140 is V4, the 5th lens
150 abbe number is V5, and meets following condition: V4-V5=34.60.
In five chip broad angle lens groups of first embodiment, the whole focal length of the five chips broad angle lens group is f, this first
The object side surface 111 of lens 110 is TL in the distance on optical axis 190 to imaging surface 180, and meets following condition: f/TL=
0.386。
Cooperate again referring to following table 1 and table 2.
Table 1 is the detailed structured data of Figure 1A first embodiment, and wherein the unit of radius of curvature, thickness and focal length is mm,
And surface 0-15 is sequentially indicated by the surface of object side to image side.Table 2 is the aspherical surface data in first embodiment, wherein k table is non-
Conical surface coefficient in spherical curve equation, A, B, C, D, E, F ... be order aspherical coefficients.In addition, following embodiment table
Lattice are the schematic diagram and curvature of the image and distortion astigmat curve graph of corresponding each embodiment, and the definition of data is all real with first in table
The definition for applying the table 1 and table 2 of example is identical, is not added repeats herein.
<second embodiment>
A and Fig. 2 B referring to figure 2., wherein Fig. 2A is painted five chip broad angle lens groups according to second embodiment of the invention
Schematic diagram, Fig. 2 B are sequentially the curvature of the image and distortion astigmat curve of five chip broad angle lens groups of second embodiment from left to right
Figure.By Fig. 2A it is found that five chip broad angle lens groups be include an aperture 200 and an optics group, the optics group is by object side to picture
Side sequentially includes the first lens 210, the second lens 220, the third lens 230, the 4th lens 240, the 5th lens 250, infrared ray
Filtering assembly 270 and imaging surface 280 are filtered out, the lens for wherein having refracting power in the five chips broad angle lens group are five.It should
Aperture 200 is arranged between the image side surface 212 of first lens 210 and the image side surface 222 of second lens 220.
First lens 210 have negative refracting power, and are plastic material, are convex at 211 dipped beam axis 290 of object side surface
Face is concave surface at 212 dipped beam axis 290 of image side surface, and the object side surface 211 and image side surface 212 are all aspherical.
Second lens 220 have positive refracting power, and are plastic material, are convex at 221 dipped beam axis 290 of object side surface
Face is convex surface at 222 dipped beam axis 290 of image side surface, and the object side surface 221 and image side surface 222 are all aspherical.
The third lens 230 have negative refracting power, and are plastic material, are convex at 231 dipped beam axis 290 of object side surface
Face is concave surface at 232 dipped beam axis 290 of image side surface, and the object side surface 231 and image side surface 232 are all aspherical.
4th lens 240 have positive refracting power, and are plastic material, are convex at 241 dipped beam axis 290 of object side surface
Face is convex surface at 242 dipped beam axis 290 of image side surface, and the object side surface 241 and image side surface 242 are all aspherical.
5th lens 250 have negative refracting power, and are plastic material, are recessed at 251 dipped beam axis 290 of object side surface
Face is concave surface at 252 dipped beam axis 290 of image side surface, and the object side surface 251 and image side surface 252 are all aspherical, and should
Object side surface 251 and a image side surface 252 at least surface have an at least point of inflexion.
It is glass material that the infrared ray, which filters out filtering assembly 270, is set between the 5th lens 250 and imaging surface 280
And do not influence the focal length of the five chips broad angle lens group.
Cooperate again referring to following table 3 and table 4.
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 3 and table 4 can extrapolate following data:
<3rd embodiment>
A and Fig. 3 B referring to figure 3., wherein Fig. 3 A is painted five chip broad angle lens groups according to third embodiment of the invention
Schematic diagram, Fig. 3 B are sequentially the curvature of the image and distortion astigmat curve of five chip broad angle lens groups of 3rd embodiment from left to right
Figure.By Fig. 3 A it is found that five chip broad angle lens groups be include an aperture 300 and an optics group, the optics group is by object side to picture
Side sequentially includes the first lens 310, the second lens 320, the third lens 330, the 4th lens 340, the 5th lens 350, infrared ray
Filtering assembly 370 and imaging surface 380 are filtered out, the lens for wherein having refracting power in the five chips broad angle lens group are five.It should
Aperture 300 is arranged between the image side surface 312 of first lens 310 and the image side surface 322 of second lens 320.
First lens 310 have negative refracting power, and are plastic material, are convex at 311 dipped beam axis 390 of object side surface
Face is concave surface at 312 dipped beam axis 390 of image side surface, and the object side surface 311 and image side surface 312 are all aspherical.
Second lens 320 have positive refracting power, and are plastic material, are convex at 321 dipped beam axis 390 of object side surface
Face is convex surface at 322 dipped beam axis 390 of image side surface, and the object side surface 321 and image side surface 322 are all aspherical.
The third lens 330 have negative refracting power, and are plastic material, are convex at 331 dipped beam axis 390 of object side surface
Face is concave surface at 332 dipped beam axis 390 of image side surface, and the object side surface 331 and image side surface 332 are all aspherical.
4th lens 340 have positive refracting power, and are plastic material, are convex at 341 dipped beam axis 390 of object side surface
Face is convex surface at 342 dipped beam axis 390 of image side surface, and the object side surface 341 and image side surface 342 are all aspherical.
5th lens 350 have negative refracting power, and are plastic material, are convex at 351 dipped beam axis 390 of object side surface
Face is concave surface at 352 dipped beam axis 390 of image side surface, and the object side surface 351 and image side surface 352 are all aspherical, and should
Object side surface 351 and a image side surface 352 at least surface have an at least point of inflexion.
It is glass material that the infrared ray, which filters out filtering assembly 370, is set between the 5th lens 350 and imaging surface 380
And do not influence the focal length of the five chips broad angle lens group.
Cooperate again referring to following table 5 and table 6.
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 5 and table 6 can extrapolate following data:
Five chips broad angle lens group provided by the invention, the material of lens can be plastics or glass, when lens material is modeling
Material, can be effectively reduced production cost, and the another material for working as lens is glass, then can increase by five chip broad angle lens group refracting powers
The freedom degree of configuration.In addition, the object side surface and image side surface of lens can be aspherical to be aspherical in five chip broad angle lens groups
It can be easy to be fabricated to the shape other than spherical surface, obtain more control variable, to cut down aberration, and then reduce lens and use
Number, therefore the total length of five chip broad angle lens groups of the invention can be effectively reduced.
In five chips broad angle lens group provided by the invention, for the lens with refracting power, if lens surface is
When not defining for convex surface and the convex surface position, then it represents that the lens surface is convex surface at dipped beam axis；If lens surface is to be recessed
Face and when not defining the concave surface position, then it represents that the lens surface is concave surface at dipped beam axis.
The more visual demand of five chips broad angle lens group provided by the invention is applied in the optical system of mobile focusing, and simultaneous
Have the characteristic of excellent lens error correction Yu good image quality, many-sided can be applied to 3D (three-dimensional) image capture, digital camera, row
In the electronic image systems such as dynamic device, Digital Drawing plate or automobile-used photography.
In conclusion the various embodiments described above and schema are only presently preferred embodiments of the present invention, when cannot with restriction
The range that the present invention is implemented, i.e., big equivalent changes and modifications made according to the patent scope of the present invention should all belong to the present invention
In the range of patent covers.
Claims (20)
1. a kind of five chip broad angle lens groups, which is characterized in that sequentially include by object side to image side:
One first lens have negative refracting power, are convex surface at the dipped beam axis of object side surface, are recessed at the dipped beam axis of image side surface
Face, object side surface are aspherical with an image side surface at least surface；
One aperture；
One second lens have positive refracting power, are convex surface at the dipped beam axis of object side surface, are convex at the dipped beam axis of image side surface
Face, object side surface are aspherical with an image side surface at least surface；
One the third lens have negative refracting power, are convex surface at the dipped beam axis of object side surface, are recessed at the dipped beam axis of image side surface
Face, object side surface are aspherical with an image side surface at least surface；
One the 4th lens have positive refracting power, are convex surface at the dipped beam axis of object side surface, are convex at the dipped beam axis of image side surface
Face, object side surface are aspherical with an image side surface at least surface；And
One the 5th lens have negative refracting power, are concave surface at the dipped beam axis of image side surface, object side surface and image side surface are at least
One surface be it is aspherical, object side surface and an image side surface at least surface have an at least point of inflexion.
2. five chips broad angle lens group as described in claim 1, which is characterized in that the focal length of first lens is f1, this
The focal length of two lens is f2, and meets following condition: -2.2 < f1/f2 < -1.45.
3. five chips broad angle lens group as described in claim 1, which is characterized in that the focal length of second lens is f2, this
The focal length of three lens is f3, and meets following condition: -0.6 < f2/f3 < -0.3.
4. five chips broad angle lens group as described in claim 1, which is characterized in that the focal length of the third lens is f3, this
The focal length of four lens is f4, and meets following condition: -2.1 < f3/f4 < -1.0.
5. five chips broad angle lens group as described in claim 1, which is characterized in that the focal length of the 4th lens is f4, this
The focal length of five lens is f5, and meets following condition: -1.2 < f4/f5 < -0.7.
6. five chips broad angle lens group as described in claim 1, which is characterized in that the focal length of first lens is f1, this
The focal length of three lens is f3, and meets following condition: 0.55 < f1/f3 < 1.0.
7. five chips broad angle lens group as described in claim 1, which is characterized in that the focal length of second lens is f2, this
The focal length of four lens is f4, and meets following condition: 0.4 < f2/f4 < 0.95.
8. five chips broad angle lens group as described in claim 1, which is characterized in that the focal length of the third lens is f3, this
The focal length of five lens is f5, and meets following condition: 1.0 < f3/f5 < 1.8.
9. five chips broad angle lens group as described in claim 1, which is characterized in that the focal length of first lens is f1, this
Two lens and the synthesis focal length of the third lens are f23, and meet following condition: -1.5 < f1/f23 < -0.95.
10. five chips broad angle lens group as described in claim 1, which is characterized in that the conjunction of second lens and the third lens
For coking away from for f23, the synthesis focal length of the 4th lens and the 5th lens is f45, and meets following condition: 0.2 < f23/f45 <
0.8。
11. five chips broad angle lens group as described in claim 1, which is characterized in that the conjunction of first lens and the second lens
For coking away from for f12, the synthesis focal length of the third lens and the 4th lens is f34, and meets following condition: 0.15 < f12/f34
< 0.75.
12. five chips broad angle lens group as described in claim 1, which is characterized in that the conjunction of the third lens and the 4th lens
For coking away from for f34, the focal length of the 5th lens is f5, and meets following condition: -2.6 < f34/f5 < -1.2.
13. five chips broad angle lens group as described in claim 1, which is characterized in that the focal length of first lens is f1, this
The synthesis focal length of two lens, the third lens and the 4th lens is f234, and meets following condition: -2.4 < f1/f234 < -1.3.
14. five chips broad angle lens group as described in claim 1, which is characterized in that second lens, the third lens and the 4th
The synthesis focal length of lens is f234, and the focal length of the 5th lens is f5, and meets following condition: -0.8 < f234/f5 < -
0.35。
15. five chips broad angle lens group as described in claim 1, which is characterized in that first lens, the second lens and third
The synthesis focal length of lens is f123, and the focal length of the 4th lens is f4, and meets following condition: 1.65 < f123/f4 < 3.0.
16. five chips broad angle lens group as described in claim 1, which is characterized in that first lens, the second lens and third
The synthesis focal length of lens is f123, and the synthesis focal length of the 4th lens and the 5th lens is f45, and meets following condition: 0.65
< f123/f45 < 1.8.
17. five chips broad angle lens group as described in claim 1, which is characterized in that the abbe number of second lens is V2,
The abbe number of the third lens is V3, and meets following condition: 30 < V2-V3 < 42.
18. five chips broad angle lens group as described in claim 1, which is characterized in that the abbe number of the 4th lens is V4,
The abbe number of 5th lens is V5, and meets following condition: 30 < V4-V5 < 42.
19. five chips broad angle lens group as described in claim 1, which is characterized in that the entirety of the five chips broad angle lens group
Focal length is f, and the object side surface of first lens to imaging surface is TL in the distance on optical axis, and meets following condition: 0.25 <
F/TL < 0.6.
20. five chips broad angle lens group as described in claim 1, which is characterized in that the focal length of first lens is f1, this
Two lens, the third lens, the 4th lens and the 5th lens synthesis focal length be f2345, and meet following condition: -2.7 < f1/
F2345 < -1.6.
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| CN201710442395.4A CN109085694B (en) | 2017-06-13 | 2017-06-13 | Five-piece type wide-angle lens group |
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| CN110082891A (en) * | 2019-05-20 | 2019-08-02 | 惠州萨至德光电科技有限公司 | A kind of wide-angle image camera lens |
| CN110361853A (en) * | 2019-08-16 | 2019-10-22 | 瑞声通讯科技(常州)有限公司 | Camera optical camera lens |
| CN110908080A (en) * | 2019-12-23 | 2020-03-24 | 瑞声通讯科技(常州)有限公司 | Image pickup optical lens |
| CN111830670A (en) * | 2019-04-18 | 2020-10-27 | 新巨科技股份有限公司 | Five-piece type wide-angle lens group |
| CN114815139A (en) * | 2021-01-27 | 2022-07-29 | 大立光电股份有限公司 | Optical image capturing lens assembly, image capturing device and electronic device |
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| CN111830670A (en) * | 2019-04-18 | 2020-10-27 | 新巨科技股份有限公司 | Five-piece type wide-angle lens group |
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