CN104181676B - Microminiature lens - Google Patents
Microminiature lens Download PDFInfo
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- CN104181676B CN104181676B CN201310196725.8A CN201310196725A CN104181676B CN 104181676 B CN104181676 B CN 104181676B CN 201310196725 A CN201310196725 A CN 201310196725A CN 104181676 B CN104181676 B CN 104181676B
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Abstract
The present invention relates to a kind of microminiature lens, sequentially include the first lens, the second lens and the 3rd lens from thing side to image side along optical axis.First lens are convexoconcave lens and have negative refractive power, the first lens convex surface facing thing side and concave surface towards image side.Second lens have positive refractive power.3rd lens are convexoconcave lens and have negative refractive power, the 3rd lens convex surface facing thing side and concave surface towards image side.
Description
Technical field
The present invention is related to a kind of camera lens, in particular to a kind of microminiature lens.
Background technology
The three-chip type framework camera lens being currently known, its first lens use mostly has the saturating of positive refractive power
Mirror so that the visual angle of this type of camera lens is restricted, has influence on the range of application of this type of camera lens.
Summary of the invention
The technical problem to be solved in the present invention is, above-mentioned for three-chip type framework camera lens of the prior art
Defect, it is provided that a kind of microminiature lens, possesses miniaturization and large viewing, but still has good optics
Performance, image resolution also can meet requirement, it is possible to decrease production cost.
The present invention solves that the scheme that its technical problem is used is to provide a kind of microminiature lens, along light
Axle sequentially includes the first lens, the second lens and the 3rd lens from thing side to image side.First lens are that convex-concave is saturating
Mirror and there is negative refractive power, the first lens convex surface facing thing side and concave surface towards image side.Second lens have
Positive refractive power.3rd lens are convexoconcave lens and have negative refractive power, the 3rd lens convex surface facing thing side and
Concave surface is towards image side.
Wherein microminiature lens meets following condition: 0.35≤BFL/TTL≤0.38；Wherein, BFL is micro-
The back focal length of small-sized camera lens, TTL is that the thing side surface of the first lens is to imaging surface distance on optical axis.
Wherein the first lens meet following condition :-4.5≤f1/f≤-3.3；Wherein, f1It is the first lens
Effective focal length, f is the effective focal length of microminiature lens.
Wherein the second lens meet following condition: 0.5≤f2/f≤0.55；Wherein, f2It is having of the second lens
Effect focal length, f is the effective focal length of microminiature lens.
Wherein the 3rd lens meet following condition :-0.9≤f3/f≤-0.8；Wherein, f3It is the 3rd lens
Effective focal length, f is the effective focal length of microminiature lens.
Wherein the first lens and the 3rd lens meet following condition: 3.75≤f1/f3≤5.5；Wherein, f1It is
The effective focal length of one lens, f3It it is the effective focal length of the 3rd lens.
Wherein the first lens at least one side is non-spherical surface or two faces are all non-spherical surface.
Wherein the second lens at least one side is non-spherical surface or two faces are all non-spherical surface.
Wherein the 3rd lens at least one side is non-spherical surface or two faces are all non-spherical surface.
Wherein the first lens, the second lens and the 3rd lens are made up of plastic material.
The microminiature lens of the present invention can further include aperture, is arranged between the first lens and the second lens.
Implement the present invention microminiature lens, have the advantages that can effectively shorten camera lens total length,
Improve visual angle, effectively revise aberration, promote resolution of lens.
Accompanying drawing explanation
For making the above-mentioned purpose of the present invention, feature and advantage to become apparent, preferable enforcement cited below particularly
Example also coordinates accompanying drawing to elaborate.
Fig. 1 is based on lens configuration and the light path schematic diagram of the first embodiment of the microminiature lens of the present invention.
Fig. 2 A is the curvature of field figure of the microminiature lens of Fig. 1.
Fig. 2 B is the distortion figure of the microminiature lens of Fig. 1.
Fig. 2 C, 2D, 2E are the lateral light fan figures of the microminiature lens of Fig. 1.
Fig. 2 F, 2G, 2H are the dot patterns of the microminiature lens of Fig. 1.
Fig. 3 is based on lens configuration and the light path schematic diagram of the second embodiment of the microminiature lens of the present invention.
Fig. 4 A is the curvature of field figure of the microminiature lens of Fig. 3.
Fig. 4 B is the distortion figure of the microminiature lens of Fig. 3.
Fig. 4 C, 4D, 4E are the lateral light fan figures of the microminiature lens of Fig. 3.
Fig. 4 F, 4G, 4H are the dot patterns of the microminiature lens of Fig. 3.
Detailed description of the invention
Refer to Fig. 1, Fig. 1 be based on the present invention microminiature lens first embodiment lens configuration with
Light path schematic diagram.Microminiature lens 1 along optical axis OA1 sequentially include from thing side to image side the first lens L11,
Aperture ST1, the second lens L12, the 3rd lens L13 and optical filter OF1.First lens L11 has negative
Refractive power is made up of plastic material, and its thing side S11 is convex surface and image side surface S12 is concave surface, thing side
S11 and image side surface S12 is all non-spherical surface.Second lens L12 has positive refractive power by plastic material system
Becoming, its thing side S14 is convex surface and image side surface S15 is convex surface, and thing side S14 is all with image side surface S15
Non-spherical surface.3rd lens L13 has negative refractive power and is made up of plastic material, and its thing side S16 is convex
Face and image side surface S17 are concave surface, and thing side S16 and image side surface S17 is all non-spherical surface.Optical filter
OF1 is plate glass, and its thing side S18 and image side surface S19 is all plane.
It addition, for making the microminiature lens of the present invention can keep good optical property, in first embodiment
Microminiature lens 1 need to meet beneath five conditions:
0.35≤BFL1/TTL1≤0.38 (1)
-4.5≤f11/f1≤-3.3 (2)
0.5≤f12/f1≤0.55 (3)
-0.9≤f13/f1≤-0.8 (4)
3.75≤f11/f13≤5.5 (5)
Wherein, BFL1 is the back focal length of microminiature lens 1, and TTL1 is the thing side of the first lens L11
The S11 to imaging surface IMA1 distance on optical axis OA1, f1 is the effective focal length of microminiature lens 1, f11
It is the effective focal length of the first lens L11, f12It is the effective focal length of the second lens L12, f13It is the 3rd lens
The effective focal length of L13.
Utilize the design of said lens and aperture ST1 so that it is total that microminiature lens 1 can effectively shorten camera lens
Length, improve visual angle, effectively revise aberration, promote resolution of lens.
Table one is the relevant parameter table of each lens of microminiature lens 1 in Fig. 1, and table one data show this enforcement
The effective focal length of the microminiature lens 1 of example equal to 1.009mm, f-number equal to 2.8, visual angle is equal to 82.74
°, camera lens total length is equal to 2.301mm.
Table one
Obtained by table one, the non-spherical surface depression degree z of each lens is by following equation:
Z=ch2/{1+[1-(k+1)c2h2]1/2}+Ah4+Bh6+Ch8+Dh10+Eh12+Fh14+Gh16
Wherein:
C: curvature；
H: the vertical dimension of lens surface any point to optical axis；
K: circular cone coefficient；
A～G: asphericity coefficient.
Table two is the relevant parameter table of the non-spherical surface of each lens in table one, and wherein k is circular cone coefficient
(Conic Constant), A～G are asphericity coefficient.
Table two
Its back focal length BFL1=0.866mm of microminiature lens 1 of first embodiment, camera lens total length
TTL1=2.301mm, effective focal length f1=1.009mm of microminiature lens 1, the having of the first lens L11
Effect focal distance f 11=-3.442mm, effective focal length f1 of the second lens L122=0.541mm, the 3rd lens L13
Effective focal length f13=-0.907mm, by above-mentioned data can get BFL1/TTL1=0.3764,
f11/ f1=-3.4113, f12/ f1=0.5362, f13/ f1=-0.8989, f11/f13=3.7949, all can expire
The above-mentioned condition of foot (1) is to the requirement of condition (5).
It addition, the optical property of the microminiature lens 1 of first embodiment also can reach requirement, this can be from figure
2A to 2H finds out.Shown in Fig. 2 A, it is the curvature of field (Field of the microminiature lens 1 of first embodiment
Curvature) figure.Shown in Fig. 2 B, it it is the distortion (Distortion) of the microminiature lens 1 of first embodiment
Figure.Shown in Fig. 2 C, Fig. 2 D, Fig. 2 E, it it is the lateral light fan figure of the microminiature lens 1 of first embodiment
(Transverse Ray Fan Plot).Shown in Fig. 2 F, Fig. 2 G, Fig. 2 H, it it is first embodiment
The dot pattern (Spot Diagram) of microminiature lens 1.
Be can be seen that by Fig. 2 A, the microminiature lens 1 of first embodiment to wavelength be 0.436 μm, 0.546
μm, 0.656 μm light produced by meridian (Tangential) direction and the sagitta of arc (Sagittal) side
To the curvature of field between-0.04 to 0.01.Be can be seen that by Fig. 2 B, the microminiature of first embodiment
Camera lens 1 to wavelength be 0.436 μm, 0.546 μm, 0.656 μm light produced by distort between
Between-1.3% to 0.4%.Be can be seen that by Fig. 2 C, Fig. 2 D, Fig. 2 E, the microminiature lens of first embodiment
1 pair of wavelength is 0.436 μm, 0.546 μm, the light of 0.656 μm, is respectively 0.0000 in image height
At mm, 0.5280mm, 0.8800mm, produced lateral aberration value is between-12.0 μm to 10.0 μ
Between m.The microminiature lens 1 of Fig. 2 F, Fig. 2 G, Fig. 2 H display first embodiment is 0.436 μ to wavelength
M, 0.546 μm, the light of 0.656 μm, respectively at image height be 0.000mm, 0.528mm,
At 0.880mm, root-mean-square (the Root Mean Square) radius of its corresponding luminous point is respectively 3.459
Um, 1.718um, 2.198um, geometry (Geometrical) radius of its corresponding luminous point is respectively
5.451um、3.924um、5.892um.The curvature of field of the microminiature lens 1 of obvious first embodiment, abnormal
Become, lateral aberration can effectively be revised, thus obtained preferably optical property.
Refer to Fig. 3, Fig. 3 be based on the present invention microminiature lens the second embodiment lens configuration with
Light path schematic diagram.Microminiature lens 2 along optical axis OA2 sequentially include from thing side to image side the first lens L21,
Aperture ST2, the second lens L22, the 3rd lens L23 and optical filter OF2.First lens L21 has negative
Refractive power is made up of plastic material, and its thing side S21 is convex surface and image side surface S22 is concave surface, thing side
S21 and image side surface S22 is all non-spherical surface.Second lens L22 has positive refractive power by plastic material system
Becoming, its thing side S24 is convex surface and image side surface S25 is convex surface, and thing side S24 is all with image side surface S25
Non-spherical surface.3rd lens L23 has negative refractive power and is made up of plastic material, and its thing side S26 is convex
Face and image side surface S27 are concave surface, and thing side S26 and image side surface S27 is all non-spherical surface.Optical filter
OF2 is plate glass, and its thing side S28 and image side surface S29 is all plane.
It addition, for making the microminiature lens of the present invention can keep good optical property, in the second embodiment
Microminiature lens 2 need to meet beneath five conditions:
0.35≤BFL2/TTL2≤0.38 (6)
-4.5≤f21/f2≤-3.3 (7)
0.5≤f22/f2≤0.55 (8)
-0.9≤f23/f2≤-0.8 (9)
3.75≤f21/f23≤5.5 (10)
Wherein, BFL2 is the back focal length of microminiature lens 2, and TTL2 is the thing side S21 of the first lens L21
To imaging surface IMA2 distance on optical axis OA2, f2 is the effective focal length of microminiature lens 2, f21For
The effective focal length of the first lens L21, f22It is the effective focal length of the second lens L22, f23It is the 3rd lens L23
Effective focal length.
Utilize the design of said lens and aperture ST2 so that it is total that microminiature lens 2 can effectively shorten camera lens
Length, improve visual angle, effectively revise aberration, promote resolution of lens.
Table three is the relevant parameter table of each lens of microminiature lens 2 in Fig. 3, and table three data show this enforcement
The effective focal length of the microminiature lens 2 of example equal to 1.007mm, f-number equal to 2.8, visual angle is equal to 82.75
°, camera lens total length is equal to 2.303mm.
Table three
Obtained by table three, the non-spherical surface depression degree z of each lens is by following equation:
Z=ch2/{1+[1-(k+1)c2h2]1/2}+Ah4+Bh6+Ch8+Dh10+Eh12+Fh14+Gh16
Wherein:
C: curvature；
H: the vertical dimension of lens surface any point to optical axis；
K: circular cone coefficient；
A～G: asphericity coefficient.
Table four is the relevant parameter table of the non-spherical surface of each lens in table three, and wherein k is circular cone coefficient
(Conic Constant), A～G are asphericity coefficient.
Table four
Its back focal length BFL2=0.822mm of microminiature lens 2 of second embodiment, camera lens total length
TTL2=2.303mm, effective focal length f2=1.007mm of microminiature lens 2, the having of the first lens L21
Effect focal distance f 21=-4.373mm, effective focal length f2 of the second lens L222=0.535mm, the 3rd lens L23
Effective focal length f23=-0.818mm, by above-mentioned data can get BFL2/TTL2=0.3569,
f21/ f2=-4.3426, f22/ f2=0.5313, f23/ f2=-0.8123, f21/f23=5.3460, all can expire
The above-mentioned condition of foot (6) is to the requirement of condition (10).
It addition, the optical property of the microminiature lens 2 of the second embodiment also can reach requirement, this can be from figure
4A to 4H finds out.Shown in Fig. 4 A, it is the curvature of field (Field of the microminiature lens 2 of the second embodiment
Curvature) figure.Shown in Fig. 4 B, it it is the distortion (Distortion) of the microminiature lens 2 of the second embodiment
Figure.Shown in Fig. 4 C, Fig. 4 D, Fig. 4 E, it it is the lateral light fan figure of the microminiature lens 2 of the second embodiment
(Transverse Ray Fan Plot).Shown in Fig. 4 F, Fig. 4 G, Fig. 4 H, it it is the second embodiment
The dot pattern (Spot Diagram) of microminiature lens 2.
Be can be seen that by Fig. 4 A, the microminiature lens 2 of the second embodiment to wavelength be 0.436 μm, 0.546
μm, 0.656 μm light produced by meridian (Tangential) direction and the sagitta of arc (Sagittal) side
To the curvature of field between-0.05 to 0.02.Be can be seen that by Fig. 4 B, the microminiature of the second embodiment
Camera lens 2 to wavelength be 0.436 μm, 0.546 μm, 0.656 μm light produced by distort between
Between-1.4% to 0.4%.Be can be seen that by Fig. 4 C, Fig. 4 D, Fig. 4 E, the microminiature lens of the second embodiment
2 pairs of wavelength are 0.436 μm, 0.546 μm, the light of 0.656 μm, are respectively 0.0000 in image height
At mm, 0.5280mm, 0.8800mm produced lateral aberration value between-10.0 μm to 9.0 μm
Between.Fig. 4 F, Fig. 4 G, Fig. 4 H show that the microminiature lens 2 of the second embodiment is 0.436 μ to wavelength
M, 0.546 μm, the light of 0.656 μm, respectively at image height be 0.000mm, 0.528mm,
At 0.880mm, root-mean-square (the Root Mean Square) radius of its corresponding luminous point is respectively 1.441
Um, 2.027um, 2.208um, geometry (Geometrical) radius of its corresponding luminous point is respectively
2.268um、4.914um、6.108um.The curvature of field of the microminiature lens 2 of obvious second embodiment, abnormal
Become, lateral aberration can effectively be revised, thus obtained preferably optical property.
In above-described embodiment, the thing side of the first lens, the second lens and the 3rd lens is all non-with image side surface
Spherical face, however it is understood that, if the part lens in the first lens, the second lens and the 3rd lens
Or thing side or the image side surface of whole lens change spherical face into, also should belong to the scope of the present invention.
In above-described embodiment, the first lens, the second lens and the 3rd lens are all made up of plastic material, but
If it can be appreciated that part lens or whole lens in the first lens, the second lens and the 3rd lens change into
Glass material, also should belong to the scope of the present invention.
Although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention, this technology
The personnel in field, without departing from the spirit and scope of the present invention, still can make a little change and retouching, because of
This protection scope of the present invention is when being as the criterion depending on as defined in claim.
Claims (10)
1. a microminiature lens, it is characterised in that sequentially include to image side from thing side along optical axis:
First lens, these first lens are convexoconcave lens and have negative refractive power, the convex surface court of these the first lens
To this thing side and concave surface towards this image side；
Second lens, these second lens have positive refractive power；And
3rd lens, the 3rd lens are convexoconcave lens and have negative refractive power, the convex surface court of the 3rd lens
To this thing side and concave surface towards this image side；
This microminiature lens meets following condition:
0.35≤BFL/TTL≤0.38
Wherein, BFL is the back focal length of this microminiature lens, and TTL is that the thing side of these the first lens is to becoming
Image planes distance on this optical axis.
2. microminiature lens as claimed in claim 1, it is characterised in that below these first lens meet
Condition:
-4.5≤f1/f≤-3.3
Wherein, f1For the effective focal length of these the first lens, f is the effective focal length of this microminiature lens.
3. microminiature lens as claimed in claim 1, it is characterised in that below these second lens meet
Condition:
0.5≤f2/f≤0.55
Wherein, f2For the effective focal length of these the second lens, f is the effective focal length of this microminiature lens.
4. microminiature lens as claimed in claim 1, it is characterised in that below the 3rd lens meet
Condition:
-0.9≤f3/f≤-0.8
Wherein, f3For the effective focal length of the 3rd lens, f is the effective focal length of this microminiature lens.
5. microminiature lens as claimed in claim 1, it is characterised in that these first lens and this
Three lens meet following condition:
3.75≤f1/f3≤5.5
Wherein, f1For the effective focal length of these the first lens, f3Effective focal length for the 3rd lens.
6. microminiature lens as claimed in claim 1, it is characterised in that this first lens at least one side
For non-spherical surface.
7. microminiature lens as claimed in claim 1, it is characterised in that this second lens at least one side
For non-spherical surface.
8. microminiature lens as claimed in claim 1, it is characterised in that the 3rd lens at least one side
For non-spherical surface.
9. microminiature lens as claimed in claim 1, it is characterised in that these first lens, this second
Lens and the 3rd lens are made up of plastic material.
10. microminiature lens as claimed in claim 1, it is characterised in that further include aperture, this aperture
It is arranged between these first lens and this second lens.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310196725.8A CN104181676B (en) | 2013-05-23 | 2013-05-23 | Microminiature lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310196725.8A CN104181676B (en) | 2013-05-23 | 2013-05-23 | Microminiature lens |
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| CN104181676A CN104181676A (en) | 2014-12-03 |
| CN104181676B true CN104181676B (en) | 2016-09-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI612326B (en) * | 2016-10-21 | 2018-01-21 | 大立光電股份有限公司 | Micro imaging system, imaging apparatus and electronic device |
| CN110018555B (en) * | 2019-04-23 | 2021-09-10 | 广东旭业光电科技股份有限公司 | Optical imaging system and camera device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4207020B2 (en) * | 2002-07-30 | 2009-01-14 | コニカミノルタオプト株式会社 | Imaging lens |
| JP5405324B2 (en) * | 2010-01-04 | 2014-02-05 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
| CN103064169B (en) * | 2011-10-20 | 2015-04-01 | 亚洲光学股份有限公司 | Image shooting lens |
| CN103076671B (en) * | 2012-08-27 | 2016-05-11 | 玉晶光电(厦门)有限公司 | Optical imaging lens and apply the electronic installation of this camera lens |
| JP2012247807A (en) * | 2012-09-18 | 2012-12-13 | Kantatsu Co Ltd | Imaging lens for solid-state imaging element |
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