CN206258617U - Mobile telephone external camera lens - Google Patents
Mobile telephone external camera lens Download PDFInfo
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- CN206258617U CN206258617U CN201621252556.0U CN201621252556U CN206258617U CN 206258617 U CN206258617 U CN 206258617U CN 201621252556 U CN201621252556 U CN 201621252556U CN 206258617 U CN206258617 U CN 206258617U
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- external camera
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- camera lens
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Abstract
The utility model provides a kind of mobile telephone external camera lens, include successively from thing side to imaging surface with positive light coke and concave surface towards the lens of curved month type first of imaging surface, the second lens with negative power, the 3rd lens with positive light coke, with negative power and concave surface towards the lens of curved month type the 4th of imaging surface and with negative power and concave surface towards imaging surface the lens of curved month type the 5th, wherein, second lens are plastic aspheric lens；4th lens and the 5th lens glue are combined into the compound lens with negative power；The optical centre of each lens is located along the same line, and the eyeglass external diameter of each lens is sequentially reduced from thing side to imaging surface.Because second lens are plastic aspheric lens in the utility model, so that the center and corner of image all show clearly when shooting, and distortion can be reduced, additionally, the combining structure of the mobile telephone external camera lens causes that system focal length increases, aberration reduces.
Description
Technical field
The utility model is related to external lens technology field, more particularly to a kind of mobile telephone external camera lens.
Background technology
In recent years, with the continuous progress of science and technology, mobile phone is constantly towards intelligent, miniaturization, touch screen direction hair
Exhibition, the function, the various great demands for meeting user of application such as integrates communication, entertains, takes pictures.It is integrated with work(of taking pictures
Can mobile phone due to receiving the limitation of the size, weight of mobile phone, typically can only simply be shot, it is impossible to meet user and enter
The demands such as row wide-long shot, optical zoom or high-definition shooting.
In the prior art, it is not enough in order to make up this, obtain more preferable shooting effect, it will usually add at the camera lens of mobile phone
Fill external camera lens.Due to configuring external camera lens so that equivalent to the original focal length that increased mobile lens during mobile phone photograph, its bat
Can be matched in excellence or beauty with mm professional camera special according to image quality and optical zoom ability, substantially exceed mobile phone effect of taking pictures in itself.
Above-mentioned mobile telephone external camera lens, although increased the original focal length of mobile lens so that during shooting, the center of image
Clearly, but the corner of image relatively obscure.Additionally, under equal enlargement ratio, the external diameter of mobile telephone external camera lens is larger, aberration
It is larger with distorting.
Utility model content
Based on this, the purpose of this utility model is to provide a kind of mobile telephone external camera lens, when being used cooperatively with mobile lens,
The center and corner of shooting image can be made all to show clearly, and distortion can be reduced.
A kind of mobile telephone external camera lens, includes thering is positive light coke and concave surface towards imaging surface successively from thing side to imaging surface
The lens of curved month type first, the second lens with negative power, the 3rd lens with positive light coke, with negative power and recessed
Facing to imaging surface the lens of curved month type the 4th and with negative power and concave surface towards imaging surface the lens of curved month type the 5th, its
In,
Second lens are plastic aspheric lens；
4th lens and the 5th lens glue are combined into the compound lens with negative power；
The optical centre of each lens is located along the same line, and each lens eyeglass external diameter from thing side to imaging surface according to
Secondary reduction.
Prior art is compared, because second lens are plastic aspheric lens in the utility model, so that
The center and corner of image all show clearly during shooting, and can reduce distortion, additionally, the combination knot of the mobile telephone external camera lens
Structure causes that system focal length increases, and aberration reduces.
Further, song of the radius of curvature of minute surface of first lens towards thing side less than the minute surface towards imaging surface
Rate radius.The radius of curvature of two minute surfaces of first lens sets and is favorably improved the mobile telephone external camera lens and Mobile phone mirror
System focal length when head is used cooperatively.
Further, song of the radius of curvature of minute surface of second lens towards thing side more than the minute surface towards imaging surface
Rate radius.
Further, first lens, the 4th lens and the 5th lens are all glass spherical lens.Its
In, the 4th lens and the 5th lens group into balsaming lens help to reduce the aberration of the mobile telephone external camera lens.
Further, the 3rd lens are the one kind in the middle of glass spherical lens or plastic aspheric lens.
Further, the radius of curvature of minute surface of the 4th lens towards thing side is less than the 5th lens towards imaging
The radius of curvature of the minute surface in face.
Further, the mobile telephone external camera lens meets conditional：
T/ImgH ＜ 12, (1),
Wherein, T represents the system overall length of the mobile telephone external camera lens, and ImgH represents the imaging surface of the mobile telephone external camera lens
On half image height.When the value of condition (1) exceedes the upper limit, the system overall length of the mobile telephone external camera lens is excessive, it is impossible to reach institute
State miniaturization, the purpose of compact conformation of mobile telephone external camera lens.
Further, the mobile telephone external camera lens meets conditional：
Wherein,The focal power of the mobile telephone external camera lens is represented,Represent first power of lens,Represent
Second power of lens,Represent the 3rd power of lens,Represent the 4th lens and described
The combination focal power of five lens.In condition (2) to (5), the distribution of the system focal power of the mobile telephone external camera lens, energy are limited
Effectively spherical aberration corrector and the curvature of field, while providing suitable Lens.
Further, the mobile telephone external camera lens meets conditional：
10 ＜ V5-V4＜ 40, (6),
And V1＞ 45, V4＜ 30, V5＞ 40,
Wherein, V1、V4、V5First lens, the 4th lens, the material Abbe of the 5th lens are represented respectively
Number.When the value of condition (6) exceedes lower limit, aberration is larger, and correction is difficult；When the value of condition (6) exceedes the upper limit, it is unfavorable for material
Material is chosen.
Further, the mobile telephone external camera lens meets conditional：
0.07 ＜ (r9-r7)/(r9+r7) ＜ 0.57, (7),
Wherein, r7Represent radius of curvature of the 4th lens near the surface of thing side, r9Represent that the 5th lens are close to
The radius of curvature on the surface of imaging surface.When the value of condition (7) exceedes the upper limit, the curvature of field and distortion too increase towards negative direction, compared with
Positive difficult, when the value of condition (7) exceedes lower limit, the curvature of field and distortion too increase towards positive direction, and calibration is difficult.
Brief description of the drawings
Fig. 1 a are the cross section structure schematic diagram of mobile telephone external camera lens in the utility model first embodiment；
Fig. 1 b are the curvature of field figure of mobile telephone external camera lens in the utility model first embodiment；
Fig. 1 c are the distortion figure of mobile telephone external camera lens in the utility model first embodiment；
Fig. 1 d are the lateral chromatic aberration figure of mobile telephone external camera lens in the utility model first embodiment；
Fig. 2 a are the cross section structure schematic diagram of mobile telephone external camera lens in the utility model second embodiment；
Fig. 2 b are the curvature of field figure of mobile telephone external camera lens in the utility model second embodiment；
Fig. 2 c are the distortion figure of mobile telephone external camera lens in the utility model second embodiment；
Fig. 2 d are the lateral chromatic aberration figure of mobile telephone external camera lens in the utility model second embodiment；
Fig. 3 a are the cross section structure schematic diagram of mobile telephone external camera lens in the utility model 3rd embodiment；
Fig. 3 b are the curvature of field figure of mobile telephone external camera lens in the utility model 3rd embodiment；
Fig. 3 c are the distortion figure of mobile telephone external camera lens in the utility model 3rd embodiment；
Fig. 3 d are the lateral chromatic aberration figure of mobile telephone external camera lens in the utility model 3rd embodiment.
Main element symbol description：
| First lens | L1 | Second lens | L2 |
| 3rd lens | L3 | 4th lens | L4 |
| 5th lens | L5 |
Following specific embodiment will further illustrate the utility model with reference to above-mentioned accompanying drawing.
Specific embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
State.Some embodiments of the present utility model are given in accompanying drawing.But, the utility model can come real in many different forms
It is existing, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is made to public affairs of the present utility model
Open content more thorough comprehensive.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with technology of the present utility model is belonged to
The implication that the technical staff in domain is generally understood that is identical.It is herein to be in term used in the description of the present utility model
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " include
The arbitrary and all of combination of one or more related Listed Items.
Refer to Fig. 1 a, Fig. 2 a and Fig. 3 a, in each embodiment of the utility model provide mobile telephone external camera lens, from thing side to
Imaging surface includes successively：With positive light coke and concave surface towards the first lens of curved month type L1 of imaging surface, with negative power
Second lens L2, the 3rd lens L3 with positive light coke, with negative power and concave surface towards imaging surface curved month type the 4th
Lens L4 and with negative power and concave surface towards imaging surface the lens L5 of curved month type the 5th, wherein,
The second lens L2 is plastic aspheric lens；
Glued compound lens of the composition with negative power of the 4th lens L4 and the 5th lens L5；
The optical centre of each lens is located along the same line, and each lens eyeglass external diameter from thing side to imaging surface according to
Secondary reduction.
Because the second lens L2 is plastic aspheric lens, so that the center and corner of shooting image all show
Clearly, and distortion can be reduced, the combining structure of the mobile telephone external camera lens causes that system focal length increases, aberration reduces.
The 4th lens L4 and the 5th lens L5 composition balsaming lens, and the 4th lens L4 is towards thing side
The radius of curvature of minute surface helps to reduce the mobile phone less than the radius of curvature of minute surfaces of the 5th lens L5 towards imaging surface
The aberration of external camera lens.
Curvature half of the radius of curvature of minute surface of first lens towards L1 towards thing side less than the minute surface towards imaging surface
Footpath, this setting is favorably improved the system focal length when mobile telephone external camera lens is used cooperatively with mobile lens.
Radius of curvature of the radius of curvature of minute surfaces of the second lens L2 towards thing side more than the minute surface towards imaging surface.
The aspherical surface configuration of mobile telephone external camera lens is satisfied by following equations in each embodiment of the present utility model：
Wherein, z be it is aspherical along optical axis direction height for h position when, away from aspheric vertex of surface apart from rise, h is
To the distance of curved surface, c is the vertex curvature of curved surface to optical axis, and k is circular cone coefficient conic, A2iIt is the aspherical face type system of 2i ranks
Number.
In following each embodiment, the thickness of each lens in the mobile telephone external camera lens, radius of curvature, material choosing
Select that part is different, the specific different parameter lists that can be found in each embodiment.
The symbol of each embodiment is expressed as follows：
f：The focal length of system；F#：F numbers (F-number)；θ：Angle of half field-of view；r：Radius of curvature；
d：Optical surface spacing；nd：The d line refractive indexes of material；vd：The Abbe number of material.
In each embodiment of the present utility model, the face type and material of each lens are as shown in table 1.
Table 1
Embodiment 1
Fig. 1 a are referred to, is a kind of mobile telephone external camera lens 100 of offer in the utility model first embodiment, the present embodiment
In, the relevant parameter of each lens is as shown in table 2.
Table 2
| Surface sequence number | r | d | Vd | ||
| 1 | Thing | — | 0.5 | ||
| 2 | Lens 1 | 17.035 | 7.52 | 1.618 | 63.42 |
| 3 | 38.980 | 5.98 | |||
| 4 | Lens 2 | 55.565 | 4.27 | 1.651 | 21.51 |
| 5 | 47.132 | 0.5 | |||
| 6 | Lens 3 | 54.300 | 4.80 | 1.741 | 27.76 |
| 7 | -54.300 | 0.10 | |||
| 8 | Lens 4 | 19.970 | 1.20 | 2.022 | 29.06 |
| 9 | Lens 5 | 4.776 | 2.68 | 1.470 | 66.90 |
| 10 | 23.413 | 2.87 | |||
| 11 | Plate glass | — | 0.50 | 1.523 | 54.51 |
| 12 | — | 0.40 | |||
| 13 | Diaphragm | — | 4.15 | ||
| 14 | Image planes | — | — |
As shown in Table 2, the radius of curvature of minute surfaces of the 3rd lens L3 towards thing side is equal to the minute surface towards imaging surface
Radius of curvature.
In the present embodiment, the aspherical parameter of each lens is as shown in table 3.
Table 3
In the present embodiment, the curvature of field of the mobile telephone external camera lens 100, distortion and lateral chromatic aberration are respectively such as figure Fig. 1 b, figure
Shown in 1c and Fig. 1 d.The curvature of field, distortion and lateral chromatic aberration can be by good schools in can be seen that the present embodiment by Fig. 1 b to Fig. 1 d
Just.
Embodiment 2
Fig. 2 a are referred to, is a kind of mobile telephone external camera lens 200 that the utility model second embodiment kind is provided, the present embodiment
Described in mobile telephone external camera lens 200 it is more or less the same with the structure of mobile telephone external camera lens described in first embodiment 100, difference
In being the present embodiment, the 3rd lens L3 is plastic aspheric lenes, and the radius of curvature of each lens changes, material
Change.
In the present embodiment, the relevant parameter of each lens is as shown in table 4.
Table 4
| Surface sequence number | r | d | Vd | ||
| 1 | Thing | — | 0.5 | ||
| 2 | Lens 1 | 16.395 | 5.89 | 1.788 | 47.51 |
| 3 | 22.022 | 4.90 | |||
| 4 | Lens 2 | 9.665 | 3.83 | 1.640 | 23.53 |
| 5 | 5.635 | 0.99 | |||
| 6 | Lens 3 | 7.793 | 3.71 | 1.535 | 55.69 |
| 7 | 44.597 | 0.41 | |||
| 8 | Lens 4 | 25.334 | 0.69 | 2.002 | 29.06 |
| 9 | Lens 5 | 4.515 | 3.812 | 1.517 | 52.19 |
| 10 | 91.636 | 2.89 | |||
| 11 | Plate glass | — | 0.50 | 1.523 | 54.51 |
| 12 | — | 0.8 | |||
| 13 | Diaphragm | — | 4.15 | ||
| 14 | Image planes | — | — |
As shown in Table 4, the radius of curvature of minute surfaces of the 3rd lens L3 towards thing side is less than the minute surface towards imaging surface
Radius of curvature.
In the present embodiment, the aspherical parameter of each lens is as shown in table 5.
Table 5
In the present embodiment, the curvature of field of the mobile telephone external camera lens 200, distortion and lateral chromatic aberration respectively as Fig. 2 b, Fig. 2 c,
With shown in Fig. 2 d.The curvature of field, distortion and lateral chromatic aberration can be by good schools in can be seen that the present embodiment by Fig. 2 b to Fig. 2 d
Just.
Embodiment 3
Fig. 3 a are referred to, is a kind of mobile telephone external camera lens 300 that the utility model 3rd embodiment kind is provided, the present embodiment
Described in mobile telephone external camera lens 300 it is more or less the same with the structure of mobile telephone external camera lens described in second embodiment 200, difference
In being the present embodiment, the 3rd lens L3 is glass spherical lens, and the radius of curvature of each lens changes, material hair
It is raw to change.
In the present embodiment, the relevant parameter of each lens is as shown in table 6.
Table 6
| Surface sequence number | r | d | Vd | ||
| 1 | Thing | — | 0.5 | ||
| 2 | Lens 1 | 17.890 | 5.71 | 1.620 | 60.37 |
| 3 | 26.560 | 7.76 | |||
| 4 | Lens 2 | 10.127 | 1.98 | 1.651 | 21.51 |
| 5 | 6.920 | 0.88 | |||
| 6 | Lens 3 | 11.583 | 4.13 | 1.801 | 34.97 |
| 7 | 30.480 | 2.13 | |||
| 8 | Lens 4 | 12.031 | 0.62 | 2.022 | 29.06 |
| 9 | Lens 5 | 3.928 | 3.21 | 1.581 | 40.92 |
| 10 | 13.932 | 2.64 | |||
| 11 | Plate glass | — | 0.5 | 1.523 | 54.51 |
| 12 | — | 0.8 | |||
| 13 | Diaphragm | — | 4.15 | ||
| 14 | Image planes | — | — |
As shown in Table 6, the radius of curvature of minute surfaces of the 3rd lens L3 towards thing side is less than the minute surface towards imaging surface
Radius of curvature.
In the present embodiment, the aspherical parameter of each lens is as shown in table 7.
Table 7
In the present embodiment, the curvature of field of the mobile telephone external camera lens 300, distortion and lateral chromatic aberration are respectively such as Fig. 3 b, 3c, 3d
It is shown.The curvature of field, distortion and lateral chromatic aberration can be corrected well in can be seen that the present embodiment by Fig. 3 b to Fig. 3 d.
Table 8 is above-mentioned 3 embodiments and its corresponding optical characteristics, including system focal length f, F-number F#, the θ of the angle of visual field 2
With system overall length TTL, and numerical value corresponding with above each conditional.
Table 8
Summary embodiment, has reached following optical index：(1) angle of visual field：2 36 ° of θ ＞；(2) optics overall length：
TL<36mm；(3) F-number：F#≤2.25.Additionally, the textural association of each lens causes the external diameter of the mobile telephone external camera lens
It is 32mm.
The mobile telephone external camera lens meets conditional：
T/ImgH ＜ 12, (1),
Wherein, T represents the system overall length of the mobile telephone external camera lens, and ImgH represents the imaging surface of the mobile telephone external camera lens
On half image height.When the value of this condition (1) exceedes the upper limit, the system overall length of the mobile telephone external camera lens is excessive, it is impossible to reach
The miniaturization of the mobile telephone external camera lens, the purpose of compact conformation.
The mobile telephone external camera lens meets conditional：
Wherein,The focal power of the mobile telephone external camera lens is represented,Represent first power of lens,Represent
Second power of lens,Represent the 3rd power of lens,Represent the 4th lens and described
The combination focal power of five lens.In condition (2) to (5), the distribution of the system focal power of the mobile telephone external camera lens, energy are limited
Effectively spherical aberration corrector and the curvature of field, while providing suitable Lens.
The mobile telephone external camera lens meets conditional：
10 ＜ V5-V4＜ 40, (6),
And V1＜ 45, V4＜ 30, V5＜ 40,
Wherein, V1、V4、V5First lens, the 4th lens, the material Abbe of the 5th lens are represented respectively
Number.In this condition, when the value of condition (6) exceedes lower limit, aberration is larger, and correction is difficult；When the value of condition (6) exceedes the upper limit
When, it is unfavorable for material selection.
The mobile telephone external camera lens meets conditional：
0.07 ＜ (r9-r7)/(r9+r7) ＜ 0.57, (7),
Wherein, r7Represent radius of curvature of the 4th lens near the surface of thing side, r9Represent that the 5th lens are close to
The radius of curvature on the surface of imaging surface.In this condition, when the value of condition (7) exceedes the upper limit, the curvature of field and distortion are towards negative direction mistake
Point increase, calibration is difficult, and when the value of condition (7) exceedes lower limit, the curvature of field and distortion too increase towards positive direction, and calibration is difficult.
Because the data area of curvature of field curve, distortion curve is smaller, it is better to represent lens performance, so from each embodiment
In accompanying drawing can draw, the scope of the curvature of field in each embodiment -0.1~+0.1, distortion scope between -2~+2,
Illustrate that the curvature of field and distortional strain energy in each embodiment are corrected well.Transverse direction can be drawn by the lateral chromatic aberration figure of each embodiment
The scope of aberration illustrates that the lateral chromatic aberration of the mobile telephone external camera lens is smaller -2.5~+2.5.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore can not be interpreted as the limitation to the utility model the scope of the claims.It should be pointed out that common for this area
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of mobile telephone external camera lens, it is characterised in that include that there is positive light coke and concave surface court successively from thing side to imaging surface
To the lens of curved month type first of imaging surface, the second lens with negative power, the 3rd lens with positive light coke, with negative
Focal power and concave surface towards imaging surface the lens of curved month type the 4th and with negative power and concave surface towards imaging surface curved month type
5th lens, wherein,
Second lens are plastic aspheric lens；
4th lens and the 5th lens glue are combined into the compound lens with negative power；
The optical centre of each lens is located along the same line, and the eyeglass external diameter of each lens subtracts successively from thing side to imaging surface
It is small.
2. mobile telephone external camera lens according to claim 1, it is characterised in that minute surface of first lens towards thing side
Radius of curvature of the radius of curvature less than the minute surface towards imaging surface.
3. mobile telephone external camera lens according to claim 1, it is characterised in that minute surface of second lens towards thing side
Radius of curvature of the radius of curvature more than the minute surface towards imaging surface.
4. mobile telephone external camera lens according to claim 1, it is characterised in that first lens, the 4th lens and
5th lens are all glass spherical lens.
5. mobile telephone external camera lens according to claim 1, it is characterised in that the 3rd lens be glass spherical lens or
One kind in the middle of plastic aspheric lens.
6. mobile telephone external camera lens according to claim 1, it is characterised in that minute surface of the 4th lens towards thing side
Radius of curvature of the radius of curvature less than minute surface of the 5th lens towards imaging surface.
7. the mobile telephone external camera lens according to claim 1 to 6 any one, it is characterised in that the mobile telephone external camera lens
Meet conditional：
T/ImgH ＜ 12,
Wherein, T represents the system overall length of the mobile telephone external camera lens, and ImgH is represented on the imaging surface of the mobile telephone external camera lens
Half image height.
8. the mobile telephone external camera lens according to claim 1 to 6 any one, it is characterised in that the mobile telephone external camera lens
Meet conditional：
Wherein,The focal power of the mobile telephone external camera lens is represented,Represent first power of lens,Represent described
Second power of lens,Represent the 3rd power of lens,Represent the 4th lens and described 5th saturating
The combination focal power of mirror.
9. the mobile telephone external camera lens according to claim 1 to 6 any one, it is characterised in that the mobile telephone external camera lens
Meet conditional：
10 ＜ V5-V4＜ 40,
And V1＞ 45, V4＜ 30, V5＞ 40,
Wherein, V1、V4、V5First lens, the 4th lens, the material Abbe number of the 5th lens are represented respectively.
10. the mobile telephone external camera lens according to claim 1 to 6 any one, it is characterised in that the mobile telephone external camera lens
Meet conditional：
0.07 ＜ (r9-r7)/(r9+r7) ＜ 0.57,
Wherein, r7Represent radius of curvature of the 4th lens near the surface of thing side, r9Represent the 5th lens near imaging
The radius of curvature on the surface in face.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621252556.0U CN206258617U (en) | 2016-11-16 | 2016-11-16 | Mobile telephone external camera lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621252556.0U CN206258617U (en) | 2016-11-16 | 2016-11-16 | Mobile telephone external camera lens |
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| CN206258617U true CN206258617U (en) | 2017-06-16 |
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ID=59025953
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526798A (en) * | 2016-11-16 | 2017-03-22 | 江西联益光学有限公司 | Mobile phone external lens |
| CN112014945A (en) * | 2019-05-31 | 2020-12-01 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus |
-
2016
- 2016-11-16 CN CN201621252556.0U patent/CN206258617U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526798A (en) * | 2016-11-16 | 2017-03-22 | 江西联益光学有限公司 | Mobile phone external lens |
| CN106526798B (en) * | 2016-11-16 | 2022-08-02 | 江西联益光学有限公司 | Mobile phone external lens |
| CN112014945A (en) * | 2019-05-31 | 2020-12-01 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus |
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