CN203250061U

CN203250061U - Miniature wide-angle imaging lens

Info

Publication number: CN203250061U
Application number: CN 201320196595
Authority: CN
Inventors: 黄林; 戴付建
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2013-04-17
Filing date: 2013-04-17
Publication date: 2013-10-23
Anticipated expiration: 2023-04-17

Abstract

The utility model provides a miniature wide-angle imaging lens. The miniature wide-angle imaging lens is composed of a first positive-optical power lens, a second positive-optical power lens, a third negative-optical power lens and a fourth lens having a concave surface at an axis-near image side which are arranged from an object space to an image space sequentially, and the lenses satisfy the following relation that 5.5 < f1/f<16, wherein the f1 is the focal length of the first lens, and the f is the focal length of the entire lens. The miniature wide-angle imaging lens can be of an ultrathin structure, and can ensure high optical imaging quality.

Description

Miniature wide-angle imaging lens

Technical field

The utility model relates to a kind of imaging optical system of camera lens, relates to specifically a kind of miniature imaging lens that are comprised of four groups of lens.

Background technology

Present development along with the CMOS chip technology, the optical lens size of mobile phone or digital camera becomes more and more less, also more and more higher to the imaging of optical systems quality requirements that matches, also more and more stricter to the requirement of camera lens thickness aspect simultaneously, because the upgrading of pixel, processing and manufacturing has been proposed more high-precision requirement, all reached micron order such as the offset of lens and the technical requirement of center thickness, and along with the raising of processing technology also must promote camera lens toward subminiaturization, ultrathin typeization future development.General ultra thin type lens all is comprised of three groups of lens or four groups of lens of being arranged in order usually, especially the ultra thin type lens of four groups of lens, because lens numbers is more, should meet extra-thin structure needs, guarantee that again under the prerequisite of higher optical system imaging quality, corresponding machining precision is difficult to reach.Publication number is " CN201133964Y ", open day is " 2008.10.15 ", name is called the patent of " optical lens ", the optical imaging system that is made of four groups of lens has namely been proposed, four groups of lens in this camera lens are from the object side to the image side successively by the first lens with positive diopter, have negative dioptric the second lens, the 3rd lens with positive diopter, having negative dioptric the 4th lens forms, obtained larger progress although compare original four groups of lens structures, but it still can't obtain better balance aspect performance and the thickness, because the susceptibility of camera lens tolerance also can't further be reduced, therefore also there is certain difficulty in processing and manufacturing.

The utility model content

The utility model provides a kind of miniature wide-angle imaging lens, when satisfying ultrathin structure, has guaranteed high quality of optical imaging, and concrete structure is as described below:

Described camera lens is comprised of four groups of lens successively from object space to picture side, be respectively that the first lens of positive light coke, the second lens of positive light coke, the 3rd lens of negative power, paraxial place are the 4th lens of concave surface as side, described camera lens satisfies following relationship: 5.5＜f1/f＜16

Wherein, f1 is the focal length of first lens, and f is the focal length of whole camera lens.

Also satisfy relational expression: 6.0＜f1/f2＜17

Wherein, f1 is the focal length of first lens, and f2 is the focal length of the second lens.

And, V1＜40, wherein, V1 is the abbe number of first lens.

-16＜| R3|/R4＜-4.0, wherein, R3 is the thing side surface radius-of-curvature of the second lens, R4 is the picture side surface radius-of-curvature of the second lens.

Described first lens is that the thing side is the falcate eyeglass of convex surface, and described camera lens is provided with diaphragm, and described diaphragm is between first lens and the second lens.

It is aspheric surface that the minute surface of described camera lens has a face at least, and the eyeglass of described camera lens adopts plastic material.

The utility model has adopted 4 plastic aspherical element eyeglasses, distributes by different focal powers, has overcome the defective of prior art, and present specification requirement and performance requirement have been proposed a kind of new solution.

Description of drawings

Fig. 1 is the structural representation of the miniature wide-angle imaging lens embodiment 1 that provides of the utility model;

Fig. 2 is chromaticity difference diagram (mm) on the axle of embodiment 1;

Fig. 3 is the astigmatism figure (mm) of embodiment 1;

Fig. 4 is the distortion figure (%) of embodiment 1;

Fig. 5 is the ratio chromatism, figure (μ m) of embodiment 1;

Fig. 6 is the structural representation of embodiment 2;

Fig. 7 is chromaticity difference diagram (mm) on the axle of embodiment 2;

Fig. 8 is the astigmatism figure (mm) of embodiment 2;

Fig. 9 is the distortion figure (%) of embodiment 2;

Figure 10 is the ratio chromatism, figure (μ m) of embodiment 2.

Embodiment

Among the embodiment 1, as shown in Figure 1, described miniature wide-angle imaging lens is followed successively by first lens E1, the second lens E2, the 3rd lens E3, the 4th lens E4, optical filter E5, optical lens from the object side to the image side, and diaphragm is arranged between first lens E1 and the second lens E2.

The thing side that described first lens E1 is positive light coke is the eyeglass of convex surface, and the second lens E2 is the eyeglass of positive light coke, and the 3rd lens E3 is the eyeglass of negative power, and the 4th lens E4 is that paraxial place is the eyeglass of concave surface as side.

Direction from the object side to the image side, described first lens E1 two sides is S1, S2, the second lens E2 two sides is S3, S4, the 3rd lens E3 two sides is S5, S6, the 4th lens E4 two sides is S7, S8, optical filter E5 two sides is S9, S10, and optical lens face is S11, and wherein four groups of lens have at least one side to be aspheric surface.

The parameter of camera lens is as follows: TTL=3.132; F1=9.286; F2=1.276; F3=-6.682; F4=6.342; F=1.612.

And, f1/f=5.76; F1/f2=7.28; V1=23.78; | R3|/R4=-15.05

Systematic parameter: 1/4 " sensor devices f-number 2.4

Table 1

Following table is aspheric surface high-order term coefficient A4, A6, A8, A10, A12, A14, the A16 of non-spherical lens:

Table 2

A4

A6

A8

A10

A12

A14

A16

1.5207E-01

1.4513E-01

-3.1444E-01

5.9149E-01

-8.8050E-01

-5.4496E+00

7.8097E+00

9.5301E-01

-4.6141E-01

-1.3593E+01

-1.7088E+02

7.0034E+02

5.6964E+03

-2.4906E+04

-4.9408E-01

2.1647E+00

-6.0648E+01

1.6757E+02

1.5172E+02

5.8884E+03

-3.4001E+04

-3.5639E-01

-1.6537E-01

3.1102E+00

-1.1224E+01

1.8982E-01

-2.8995E+01

1.2169E+02

7.4888E-01

2.3791E+00

-3.9625E+00

7.1981E+00

-5.5502E+00

-2.4382E+00

-1.8374E+00

-7.9763E-01

1.7881E+00

-8.8608E-01

-7.8116E-02

3.0336E-01

-3.1483E-02

-2.9214E-01

-3.3589E-01

2.0060E-01

-1.2460E-01

-2.4735E-03

1.7738E-02

4.1582E-03

-5.0142E-03

1.1002E-01

-1.0902E-01

2.2978E-02

-1.1031E-04

-1.0077E-03

2.2627E-05

-4.8644E-05

Fig. 2 is chromaticity difference diagram (mm) on the axle of embodiment 1, and Fig. 3 is the astigmatism figure (mm) of embodiment 1, and Fig. 4 is the distortion figure (%) of embodiment 1, and Fig. 5 is the ratio chromatism, figure (μ m) of embodiment 1.

Among the embodiment 2, as shown in Figure 6, described miniature wide-angle imaging lens is followed successively by first lens E1, the second lens E2, the 3rd lens E3, the 4th lens E4, optical filter E5, optical lens from the object side to the image side, and diaphragm is arranged between first lens E1 and the second lens E2.

The parameter of camera lens is as follows: TTL=2.421; F1=11.467; F2=0.874; F3=-1.465; F4=2.105; F=1.305.

And, f1/f=8.79; F1/f2=13.12; V1=23.78; | R3|/R4=-4.12

Systematic parameter: 1/7 " sensor devices f-number 2.4

Table 1

Surface type	Radius-of-curvature	Thickness	Material	Effective diameter	The circular cone coefficient
						Sphere	Infinite	Infinite		Infinite
Aspheric surface	0.9719	0.2666	1.635/23.78	0.8910	-2.7292
						Aspheric surface	0.9997	0.0464		0.5730	-5.5195
Sphere	Infinite	0.0078		0.4831	0.0000
						Aspheric surface	2.2705	0.5687	1.544/56.11	0.6101	-0.7568
Aspheric surface	-0.5516	0.1706		1.0095	-0.6455
						Aspheric surface	-0.2150	0.2493	1.635/23.78	1.0341	-0.9740
Aspheric surface	-0.4051	0.0350		1.3405	-2.2601
						Aspheric surface	0.7743	0.4296	1.544/56.11	1.9017	-0.6346
The aspheric surface sphere	1.9048 infinite	0.18730.2100	1.517/64.17	2.35422.5347	-10.72940.0000
						Sphere	Infinite	0.2498		2.6625	0.0000
Sphere	Infinite			2.8577

Table 2

A4

A6

A8

A10

A12

A14

A16

2.8896E-01

1.8362E+00

-3.1818E+01

1.4713E+02

1.5047E+02

-1.6728E+03

-1.6846E+03

1.0458E+00

-1.6757E+01

1.9398E+02

-1.9666E+03

3.1587E+03

4.6135E+05

-5.8775E+06

-7.1119E-01

1.2732E+01

-4.2539E+02

3.5678E+03

-1.1836E+04

5.6947E+03

2.1965E+05

-1.1254E+00

7.5283E+00

-3.6039E+01

-1.3085E+02

1.3011E+03

-2.4904E+03

-2.2408E+01

2.5253E+00

6.0402E+00

-5.2331E+01

1.0769E+02

1.6615E+02

9.1841E+02

-4.1683E+03

-1.8388E+00

6.2410E+00

-6.9287E+00

8.8912E-01

7.9017E+00

-2.7925E+01

4.0124E+01

-1.0373E+00

1.2724E+00

-1.2866E+00

-9.0250E-02

6.4884E-01

1.9235E-01

-5.4489E-01

1.9481E-01

-3.9303E-01

2.0205E-01

-4.3180E-02

-3.3358E-02

1.4447E-02

-1.5280E-03

Fig. 7 is chromaticity difference diagram (mm) on the axle of embodiment 2, and Fig. 8 is the astigmatism figure (mm) of embodiment 2, and Fig. 9 is the distortion figure (%) of embodiment 2, and Figure 10 is the ratio chromatism, figure (μ m) of embodiment 2.

By chromaticity difference diagram, astigmatism figure, distortion figure and ratio chromatism, figure on the axle of each embodiment, can find out to the utlity model has good optical property.

Although the above has described principle of the present utility model and embodiment for micro pick-up lens; but under above-mentioned instruction of the present utility model; those skilled in the art can carry out various improvement and distortion on the basis of above-described embodiment, and these improvement or distortion all drop in the protection domain of the present utility model.It will be understood by those skilled in the art that top specific descriptions just in order to explain the purpose of this utility model, and be not for restriction the utility model, protection domain of the present utility model is limited by claim and equivalent thereof.

Claims

1. miniature wide-angle imaging lens, it is characterized in that: formed by four groups of lens successively from object space to picture side, be respectively that the first lens of positive light coke, the second lens of positive light coke, the 3rd lens of negative power, paraxial place are the 4th lens of concave surface as side, described camera lens satisfies relational expression

5.5<f1/f<16

2. miniature wide-angle imaging lens according to claim 1, it is characterized in that: described camera lens satisfies relational expression

6.0<f1/f2<17

3. miniature wide-angle imaging lens according to claim 1, it is characterized in that: described camera lens satisfies relational expression

V1<40

Wherein, V1 is the abbe number of first lens.

4. miniature wide-angle imaging lens according to claim 1, it is characterized in that: described camera lens satisfies relational expression

-16<|R3|/R4<-4.0

Wherein, R3 is the thing side surface radius-of-curvature of the second lens, and R4 is the picture side surface radius-of-curvature of the second lens.

5. miniature wide-angle imaging lens according to claim 1, it is characterized in that: described first lens is that the thing side is the falcate eyeglass of convex surface.

6. miniature wide-angle imaging lens according to claim 1, it is characterized in that: described camera lens is provided with diaphragm, and described diaphragm is between first lens and the second lens.

7. miniature wide-angle imaging lens according to claim 1, it is characterized in that: it is aspheric surface that the minute surface of described camera lens has a face at least.

8. miniature wide-angle imaging lens according to claim 1 is characterized in that: the eyeglass employing plastic material of described camera lens.