CN110488470A

CN110488470A - Optical lens

Info

Publication number: CN110488470A
Application number: CN201810454010.0A
Authority: CN
Inventors: 王东方; 李响; 姚波
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2018-05-14
Filing date: 2018-05-14
Publication date: 2019-11-22
Anticipated expiration: 2038-05-14
Also published as: CN110488470B

Abstract

This application discloses a kind of optical lens, the optical lens sequentially includes: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens by object side to image side along optical axis, wherein, first lens are the meniscus shaped lens with negative power, its object side is convex surface, and image side surface is concave surface；Second lens have negative power, and object side is concave surface, and image side surface is concave surface；The third lens have positive light coke, and object side is convex surface, and image side surface is convex surface；4th lens have positive light coke, and object side is convex surface, and image side surface is convex surface；5th lens have negative power, and object side is concave surface, and image side surface is concave surface；6th lens have positive light coke, and object side is convex surface, and image side surface is convex surface；7th lens are meniscus shaped lens, and object side is convex surface, and image side surface is concave surface.There is high-resolution according to the optical lens of the application, for example, the characteristics of reachable 12M or more, miniaturization, large aperture, low cost and small CRA.

Description

Optical lens

Technical field

This application involves a kind of optical lens, more specifically, this application involves a kind of optical lens including seven lens.

Background technique

It is higher and higher to the pixel request of the on-vehicle lens as automobile eyes with popularizing for unmanned technology.Mesh Before, the on-vehicle lens of million grades of pixels are gradually popularized, and the trend development of positive ten million high definition pixel.

In order to realize the high-resolution of camera lens, can usually be realized by increasing lens numbers, but this will affect the small of camera lens Type.Moreover, using in low light environment to realize, ten million pixel camera lens needs bigger aperture；In order in matching ten million Colour cast is not generated when pixel chip, then needs smaller CRA.

Therefore, it is necessary to design a kind of high-resolution of ten million pixel scale, high imaging quality and take into account miniaturization, low cost The features such as and camera lens can be used under low light environment.

Summary of the invention

This application provides it is a kind of be applicable to vehicle-mounted installation, at least overcome or part overcome it is in the prior art above-mentioned The optical lens of at least one defect.

The one aspect of the application provides a kind of optical lens, by object side to image side sequentially includes: first along optical axis Lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, wherein the first lens are tool There is the meniscus shaped lens of negative power, object side is convex surface, and image side surface is concave surface；Second lens have negative power, object Side is concave surface, and image side surface is concave surface；The third lens have positive light coke, and object side is convex surface, and image side surface is convex surface；4th Lens have positive light coke, and object side is convex surface, and image side surface is convex surface；5th lens have negative power, and object side is Concave surface, image side surface are concave surface；6th lens have positive light coke, and object side is convex surface, and image side surface is convex surface；7th lens are Meniscus shaped lens, object side are convex surface, and image side surface is concave surface.

In one embodiment, the 7th lens have positive light coke.

In one embodiment, the 7th lens have negative power.

In one embodiment, the second lens and the third lens are mutually glued.

In one embodiment, the 5th lens and the 6th lens are mutually glued.

In one embodiment, the 4th lens, the 5th lens and the 6th lens are mutually glued.

In one embodiment, at least one of the first lens, the 6th lens and the 7th lens are aspherical lens.

In one embodiment, the effective radius R2 of the first lens of optical lens image side surface and the second lens of optical lens Meet -3≤(R2-R3)/(R2+R3)≤- 0.5 between the effective radius R3 of object side.

In one embodiment, meet between the optical length TTL of optical lens and optical lens whole group focal length value F TTL/F≤4.5。

In one embodiment, the focal length value F23 of second, third gluing unit lens of optical lens and optical lens whole group Meet 1.5≤F23/F≤4 between focal length value F.

In one embodiment, the center curvature radius R12 of the 7th lens image side surface of optical lens and optical lens the Meet R12/R11≤2 between the center curvature radius R11 of seven lens object sides.

The one aspect of the application provides a kind of optical lens, by object side to image side sequentially includes: first along optical axis Lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, wherein the first lens are tool There is the meniscus shaped lens of negative power, object side is convex surface, and image side surface is concave surface；Second lens have negative power；Third Lens have positive light coke；4th lens have positive light coke；5th lens have negative power；6th lens have positive light focus Degree；7th lens are meniscus shaped lens, and object side is convex surface, and image side surface is concave surface；Optical lens the first lens image side surface Between effective radius R2 and the effective radius R3 of optical lens the second lens object side meet -3≤(R2-R3)/(R2+R3)≤- 0.5。

In one embodiment, the 7th lens have positive light coke or negative power.

In one embodiment, the object side of the second lens is concave surface, and image side surface is concave surface.

In one embodiment, the object side of the third lens is convex surface, and image side surface is convex surface.

In one embodiment, the object side of the 4th lens is convex surface, and image side surface is convex surface.

In one embodiment, the object side of the 5th lens is concave surface, and image side surface is concave surface.

In one embodiment, the object side of the 6th lens is convex surface, and image side surface is convex surface.

In one embodiment, the second lens and the third lens are mutually glued.

In one embodiment, the 5th lens and the 6th lens are mutually glued.

The camera lens of the application can be realized ten million pixel solution by the setting of reasonable lens shape and the setting of focal power Picture combines camera lens miniaturization, the low cost that susceptibility is low, production yield is high requires.The camera lens CRA of the application is smaller, can To match the vehicle-mounted cmos chip of 0 DEG C of RA well, colour cast and dark angle phenomenon will not be generated；Also, camera lens possesses large aperture, at Picture effect is good, and image quality reaches ten million high definition rank, even if also can guarantee imaging clearly in low light environment or night.The application Camera lens there is high-resolution, for example, up to 12M or more, miniaturization, large aperture, low cost and the characteristics of small CRA.

Detailed description of the invention

In conjunction with attached drawing, by the detailed description of following non-limiting embodiment, other features of the application, purpose and excellent Point will be apparent.In the accompanying drawings:

Fig. 1 is the structural schematic diagram for showing the optical lens according to the embodiment of the present application 1；

Fig. 2 is the structural schematic diagram for showing the optical lens according to the embodiment of the present application 2；And

Fig. 3 is the structural schematic diagram for showing the optical lens according to the embodiment of the present application 3.

Specific embodiment

Various aspects of the reference attached drawing to the application are made more detailed description by the application in order to better understand.It answers Understand, the only description to the illustrative embodiments of the application is described in detail in these, rather than limits the application in any way Range.In the specification, the identical element of identical reference numbers.Stating "and/or" includes associated institute Any and all combinations of one or more of list of items.

It should be noted that in the present specification, first, second, third, etc. statement is only used for a feature and another spy Sign distinguishes, without indicating any restrictions to feature.Therefore, without departing substantially from teachings of the present application, hereinafter The first lens discussed are also known as the second lens or the third lens.

In the accompanying drawings, for ease of description, thickness, the size and shape of lens are slightly exaggerated.Specifically, attached drawing Shown in spherical surface or aspherical shape be illustrated by way of example.That is, spherical surface or aspherical shape are not limited to attached drawing Shown in spherical surface or aspherical shape.Attached drawing is merely illustrative and and non-critical drawn to scale.

Herein, near axis area refers to the region near optical axis.If lens surface is convex surface and does not define convex surface position When setting, then it represents that the lens surface is convex surface near axis area is less than；If lens surface is concave surface and does not define the concave surface position When, then it represents that the lens surface is concave surface near axis area is less than.Surface in each lens near object is known as object side, Surface in each lens near imaging surface is known as image side surface.

It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory It indicates there is stated feature, element and/or component when using in bright book, but does not preclude the presence or addition of one or more Other feature, component, assembly unit and/or their combination.In addition, ought the statement of such as at least one of " ... " appear in institute When after the list of column feature, entire listed feature is modified, rather than modifies the individual component in list.In addition, when describing this When the embodiment of application, " one or more embodiments of the application " are indicated using "available".Also, term " illustrative " It is intended to refer to example or illustration.

Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein all have with The application one skilled in the art's is generally understood identical meaning.It will also be appreciated that term (such as in everyday words Term defined in allusion quotation) it should be interpreted as having and their consistent meanings of meaning in the context of the relevant technologies, and It will not be explained with idealization or excessively formal sense, unless clear herein so limit.

It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The feature of the application, principle and other aspects are described in detail below.

Optical lens according to the application illustrative embodiments includes such as seven lens with focal power, i.e., and first Lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens.This seven lens are along light Axis sequential from object side to image side.

It can also further comprise the photosensitive member for being set to imaging surface according to the optical lens of the application illustrative embodiments Part.Optionally, the photosensitive element for being set to imaging surface can be photosensitive coupling element (CCD) or Complimentary Metal-Oxide semiconductor Element (CMOS).

In the exemplary embodiment, the first lens are the meniscus shaped lens with negative power, and object side is convex surface, Image side surface is concave surface.Specifically, the shape of the first lens is the meniscus shape towards object space, can collect big visual field as much as possible Light makes the light collected enter rear optical system, increases light passing amount.In practical applications, it is contemplated that the room of on-vehicle lens Outer installation and use environment, i.e. on-vehicle lens can be in the bad weathers such as sleet, and the first lens are conducive to meniscus shape The landing of water droplet reduces influence of the water droplet on lens to lens imaging.Preferably, the first lens are aspherical lens, can be into One step improves solution image quality amount.

In the exemplary embodiment, the second lens have negative power, and object side is concave surface, and image side surface is concave surface.

In the exemplary embodiment, the third lens have positive light coke, and object side is convex surface, and image side surface is convex surface.

In the exemplary embodiment, the second lens and the third lens are mutually glued.In other words, the with negative power Two lens and the third lens with positive light coke form glued part.Wherein, positive lens (that is, second lens) folding with higher Rate is penetrated, negative lens (that is, the third lens) has lower refractive index for positive lens.Two lens, one negative one just, low folding Rate and high-index material collocation are penetrated, is conducive to the fast transition of front light, to increase diaphragm bore, meets night vision need It asks.Moreover, system color difference can be effectively reduced using glued part, keep the overall structure of optical system more compact, it is small-sized to meet Change and require, while lens unit can be reduced because of the tolerance sensitivities problem such as inclination/core shift for generating during group is stood.Specifically Ground, if discrete eyeglass is located at light ray bending, sensitivity caused by being easy because of processing/group vertical error, and according to exemplary embodiment party The balsaming lens group of formula effectively reduces this Species sensitivity.Lens with negative power are in preceding, the lens with positive light coke Rear, fast convergence carried out after front light being dissipated, then be transitioned into rear, is more advantageous to the reduction of rear ray traveling optical paths, To realize shorter TTL, wherein TTL refers to the optical length of optical lens.

In the exemplary embodiment, diaphragm is set between the third lens and the 4th lens, can effectively collect entrance The light of optical system reduces optical system eyeglass bore.In other embodiments, diaphragm can also be arranged at it as needed His position.

In the exemplary embodiment, the 4th lens have positive light coke, and object side is convex surface, and image side surface is convex surface. Setting has the 4th lens of positive light coke after aperture diaphragm, can further correct the aberration that front lens set generates, Converge light beam again simultaneously, that is, the aperture of camera lens can be increased and shorten camera lens overall length, keep optical system more compact and have There is relatively short camera lens overall length.

In the exemplary embodiment, the 5th lens have negative power, and object side is concave surface, and image side surface is concave surface.

In the exemplary embodiment, the 6th lens have positive light coke, and object side is convex surface, and image side surface is convex surface. 6th lens are preferably aspherical lens, to further increase solution image quality amount.

In the exemplary embodiment, the 5th lens and the 6th lens are mutually glued.In other words, the with negative power Five lens and the 6th lens group plastic component with positive light coke, itself can reduce tolerance sensitivities with itself achromatism, It can be with residual fraction color difference with the color difference of balance system.Further, glued part can reduce the off-axis point of the curvature of field, correction system The optical properties such as aberration and optimization distortion, CRA.5th lens and the 6th mutual gluing of lens can reduce system overall length, drop Low list eyeglass sensibility.

In the exemplary embodiment, the 4th lens, the 5th lens and the 6th lens can be mutually glued.Three lens it Between respectively mutual gluing have the advantage that reduce three lens airspace, reduce system overall length；Reduce the 4th lens, Group between 5th lens and the 6th lens founds component, reduces process, reduces cost；Lens unit is reduced because during group is vertical The tolerance sensitivities problem such as inclination/core shift of generation；And the caused light loss of reflection between eyeglass is reduced, promote illumination；Subtract Mini system overall length reduces single eyeglass sensibility.

In the exemplary embodiment, the 7th lens are meniscus shaped lens, and object side is convex surface, and image side surface is concave surface. Aspherical lens can be used in 7th lens, and the light through the 6th lens is dissipated, and make light gentle transition to imaging surface, subtract Small optical system overall length.By above-mentioned setting, the various aberrations of optical system are sufficiently corrected, and have both been able to achieve compact knot Structure, and high-resolution can be provided.

Optical lens using glued part can sharing system whole chromatic aberration correction, effective aberration correction mentions high-resolution, and makes It is compact to obtain optical system overall, meets small form factor requirements.In the exemplary embodiment, it is preferable that the first lens to the 7th are thoroughly Mirror can solve image quality amount to improve to be aspherical.

In the exemplary embodiment, the effective radius R2 of the first lens of optical lens image side surface and optical lens second are saturating Meet -3≤(R2-R3)/(R2+R3)≤- 0.5 between the effective radius R3 of mirror object side.More specifically, meeting -2.3≤(R2- R3)/(R2+R3)≤-1.By meet -3≤(R2-R3)/(R2+R3)≤- 0.5, the aberration of the recoverable optical system, and Guarantee when the light being emitted from the first lens is incident on first face of the second lens, incidence angle is not too large, to reduce The tolerance sensitivities of the optical system.

In the exemplary embodiment, meet between the optical length TTL of optical lens and optical lens whole group focal length value F TTL/F≤4.5.More specifically, meeting TTL/F≤4.Coke is shorter after meeting the optical lens of TTL/F≤4.5, helps to realize Camera lens miniaturization.

In the exemplary embodiment, the focal length value F23 of second, third gluing unit lens of optical lens and optical lens are whole Meet 1.5≤F23/F≤4 between group focal length value F.More specifically, meeting 1.8≤F23/F≤3.5.

In the exemplary embodiment, the center curvature radius R12 and optical lens of the 7th lens image side surface of optical lens Meet R12/R11≤2 between the center curvature radius R11 of 7th lens object side.More specifically, meeting R12/R11≤1.5.

However, it will be understood by those of skill in the art that without departing from this application claims technical solution the case where Under, the lens numbers for constituting camera lens can be changed, to obtain each result and advantage described in this specification.Although for example, It is described by taking seven lens as an example in embodiment, but the optical lens is not limited to include seven lens.If desired, The optical lens may also include the lens of other quantity.

The specific embodiment for being applicable to the optical lens of above embodiment is further described with reference to the accompanying drawings.

Embodiment 1

Referring to Fig. 1 description according to the optical lens of the embodiment of the present application 1.Fig. 1 is shown according to the embodiment of the present application 1 Optical lens structural schematic diagram.

As shown in Figure 1, optical lens is along optical axis from object side to sequentially including the first lens L1, the second lens at image side L2, the third lens L3, the 4th lens L4, the 5th lens L5, the 6th lens L6 and the 7th lens L7.

First lens L1 is the meniscus shaped lens with negative power, and object side is convex surface, and image side surface is concave surface.First Lens L1 is non-spherical lens.The object side of first lens and image side surface are aspherical.

Second lens L2 has negative power, and object side is concave surface, and image side surface is concave surface.

The third lens L3 has positive light coke, and object side is convex surface, and image side surface is convex surface.

4th lens L4 has positive light coke, and object side is convex surface, and image side surface is convex surface.

5th lens L5 has negative power, and object side is concave surface, and image side surface is concave surface.

6th lens L6 has positive light coke, and object side is convex surface, and image side surface is convex surface.

7th lens L7 is the meniscus shaped lens with negative power, and object side is convex surface, and image side surface is concave surface.7th Lens L7 is non-spherical lens.The object side of 7th lens and image side surface are aspherical.

Optionally, which may also include the optical filter L8 with object side S13 and image side surface S14 and has object side The protection glass L9 of face S15 and image side surface S16.Optical filter can be used for correcting color error ratio.Protection glass can be used for protecting and be located at The image sensor chip of imaging surface IMA.Light from object sequentially passes through each surface S1 to S16 and is ultimately imaged in imaging surface On S17.

In the optical lens of the present embodiment, diaphragm STO can be set between the third lens L3 and the 4th lens L4 to mention High imaging quality.

Table 1 shows radius of curvature R, thickness T, refractive index Nd and the Abbe of each lens of the optical lens of embodiment 1 Number Vd, wherein radius of curvature R and the unit of thickness T are millimeter (mm).

Table 1

Face S	Radius of curvature R	Thickness T	Refractive index Nd	Abbe number Vd
					1	5.1489	1.8607	1.81	41.00
2	3.2532	5.1166
					3	-15.4288	3.9341	1.49	70.42
4	12.4460	4.0884	1.74	44.90
					5	-12.0570	0.4960
STO	Infinity	-0.3352
					7	8.4830	3.0662	1.62	60.37
8	-11.8615	0.6000	1.76	27.55
					9	10.1872	2.6034	1.50	81.59
10	-18.2380	1.1556
					11	18.5632	2.4023	1.74	49.34
12	13.2118	2.6814
					13	Infinity	0.5000	1.52	64.21
14	Infinity	1.8102
					15	Infinity	0.4000	1.52	64.21
16	Infinity	0.1250
					IMA	Infinity

Each aspherical face type Z is limited by following formula:

Wherein, Z be it is aspherical along optical axis direction when being highly the position of h, away from aspheric vertex of surface apart from rise；C is Aspherical paraxial curvature, c=1/R (that is, inverse that paraxial curvature c is upper 1 mean curvature radius R of table)；K is circular cone coefficient conic；A, B, C, D, E are high-order coefficient.The following table 2 show can be used for aspherical lens surface S1, S2 in embodiment 1, The circular cone coefficient k and high-order coefficient A, B, C, D and E of S11 and S12.

Table 2

Face S

K

A

B

C

D

E

1

-0.6319

-7.5484E-04

-1.5702E-05

-9.4022E-07

3.2245E-08

-3.2256E-10

2

-1.0118

1.3807E-04

-2.5630E-05

-4.0241E-06

2.3875E-07

-3.9803E-09

11

12.3895

-8.1593E-04

-2.4172E-05

5.5202E-07

-6.4357E-08

1.6439E-09

12

1.4952

-2.8454E-04

-2.0094E-05

1.0528E-06

-7.2278E-08

2.3074E-09

The following table 3 shows focal length value F23, the optical lens of second, third gluing unit lens of the optical lens of embodiment 1 Whole group focal length value F, optical lens optical length TTL (that is, the first lens object space side center of optical lens is to optical lens The distance of imaging focal plane), the effective radius R2 of optical lens the first lens image side surface, optical lens the second lens object side Effective radius R3, optical lens the 7th lens object side the 7th lens image side surface of center curvature radius R11 and optical lens Center curvature radius R12.

Table 3

F23	F	TTL	R2	R3	R11	R12
							16.8509	8.2559	30.5000	3.2532	-15.4288	18.5632	13.2118

In the present embodiment, the effective radius R2 of the first lens of optical lens image side surface and optical lens the second lens object side Meet (R2-R3)/(R2+R3)=- 1.5344 between the effective radius R3 in face；The optical length TTL and optical frames of optical lens Meet TTL/F=3.694 between head whole group focal length value F；The focal length value F23 and light of second, third gluing unit lens of optical lens It learns and meets F23/F=2.041 between camera lens whole group focal length value F；And the curvature of centre of the 7th lens image side surface of optical lens half Meet R12/R11=0.712 between the center curvature radius R11 of the 7th lens object side diameter R12 and optical lens.

Embodiment 2

The optical lens according to the embodiment of the present application 2 is described referring to Fig. 2.In the present embodiment and following embodiment In, for brevity, by clipped description similar to Example 1.Fig. 2 shows the optics according to the embodiment of the present application 2 The structural schematic diagram of camera lens.

As shown in Fig. 2, optical lens is along optical axis from object side to sequentially including the first lens L1, the second lens at image side L2, the third lens L3, the 4th lens L4, the 5th lens L5, the 6th lens L6 and the 7th lens L7.

The following table 4 show the radius of curvature R of each lens of the optical lens of embodiment 2, thickness T, refractive index Nd and Ah Shellfish number Vd, wherein radius of curvature R and the unit of thickness T are millimeter (mm).The following table 5, which is shown, can be used for aspheric in embodiment 2 The circular cone coefficient k and high-order coefficient A, B, C, D and E of face lens surface S1, S2, S11 and S12.The following table 6 shows embodiment The focal length value F23 of second, third gluing unit lens of 2 optical lens, optical lens whole group focal length value F, optical lens light Schoolmate's degree TTL (that is, the first lens object space side center of optical lens to optical lens imaging focal plane distance), optical frames The effective radius R2 of first first lens image side surface, optical lens the second lens object side effective radius R3, optical lens the 7th The center curvature radius R12 of the 7th lens image side surface of center curvature radius R11 and optical lens of lens object side.

Table 4

Table 5

Face S

K

A

B

C

D

E

1

-0.7028

-7.2147E-04

-1.6094E-05

-8.8483E-07

3.2182E-08

-3.5891E-10

2

-1.0455

1.6930E-04

-1.4551E-05

-4.0471E-06

2.4416E-07

-4.7766E-09

11

11.1133

-7.0727E-04

-2.7514E-05

7.1134E-07

-8.9653E-08

3.0759E-09

12

3.1002

-1.7940E-04

-3.2130E-05

1.7808E-06

-1.5286E-07

5.2121E-09

Table 6

F23	F	TTL	R2	R3	R11	R12
							20.3779	8.1082	29.8799	3.3010	-11.5409	20.1925	14.7193

In the present embodiment, the effective radius R2 of the first lens of optical lens image side surface and optical lens the second lens object side Meet (R2-R3)/(R2+R3)=- 1.8012 between the effective radius R3 in face；The optical length TTL and optical frames of optical lens Meet TTL/F=3.685 between head whole group focal length value F；The focal length value F23 and light of second, third gluing unit lens of optical lens It learns and meets F23/F=2.513 between camera lens whole group focal length value F；And the curvature of centre of the 7th lens image side surface of optical lens half Meet R12/R11=0.729 between the center curvature radius R11 of the 7th lens object side diameter R12 and optical lens.

Embodiment 3

The optical lens according to the embodiment of the present application 3 is described referring to Fig. 3.In the present embodiment and following embodiment In, for brevity, by clipped description similar to Example 1.Fig. 3 shows the optics according to the embodiment of the present application 3 The structural schematic diagram of camera lens.

As shown in figure 3, optical lens is along optical axis from object side to sequentially including the first lens L1, the second lens at image side L2, the third lens L3, the 4th lens L4, the 5th lens L5, the 6th lens L6 and the 7th lens L7.

6th lens L6 has positive light coke, and object side is convex surface, and image side surface is convex surface.The image side surface of 6th lens is It is aspherical.

7th lens L7 is the meniscus shaped lens with positive light coke, and object side is convex surface, and image side surface is concave surface.7th Lens L7 is non-spherical lens.The object side of 7th lens and image side surface are aspherical.

Optionally, which may also include the optical filter L8 with object side S14 and image side surface S15 and has object side The protection glass L9 of face S16 and image side surface S17.Optical filter can be used for correcting color error ratio.Protection glass can be used for protecting and be located at The image sensor chip of imaging surface IMA.Light from object sequentially passes through each surface S1 to S17 and is ultimately imaged in imaging surface On S18.

The following table 7 show the radius of curvature R of each lens of the optical lens of embodiment 3, thickness T, refractive index Nd and Ah Shellfish number Vd, wherein radius of curvature R and the unit of thickness T are millimeter (mm).The following table 8, which is shown, can be used for aspheric in embodiment 3 The circular cone coefficient k and high-order coefficient A, B, C, D and E of face lens surface S1, S2, S11, S12 and S13.The following table 9 shows reality Apply focal length value F23, the optical lens whole group focal length value F, optical lens of second, third gluing unit lens of the optical lens of example 3 Optical length TTL (that is, the first lens object space side center of optical lens to optical lens imaging focal plane distance), light Learn the effective radius R2 of the first lens of camera lens image side surface, effective radius R3, the optical lens of optical lens the second lens object side The center curvature radius R12 of the 7th lens image side surface of center curvature radius R11 and optical lens of 7th lens object side.

Table 7

Table 8

Face S

K

A

B

C

D

E

1

-0.3356

-8.0987E-04

-2.9596E-05

4.2230E-07

1.4977E-09

-7.8020E-11

2

-0.9817

-1.0939E-04

-8.4798E-05

3.7400E-06

-3.3888E-08

-1.8587E-10

11

0.6521

-2.3857E-04

5.6024E-05

-2.2067E-06

6.6989E-08

-2.3851E-10

12

0.1218

-1.7907E-03

4.8160E-05

-1.2600E-06

2.0823E-08

2.0650E-11

13

0.0679

-1.9210E-03

4.0377E-05

-1.1512E-07

-3.0896E-08

9.4451E-10

Table 9

F23	F	TTL	R2	R3	R11	R12
							27.1177	8.4826	29.7420	3.3483	-12.6027	7.6851	8.9121

In the present embodiment, the effective radius R2 of the first lens of optical lens image side surface and optical lens the second lens object side Meet (R2-R3)/(R2+R3)=- 1.7236 between the effective radius R3 in face；The optical length TTL and optical frames of optical lens Meet TTL/F=3.506 between head whole group focal length value F；The focal length value F23 and light of second, third gluing unit lens of optical lens It learns and meets F23/F=3.197 between camera lens whole group focal length value F；And the curvature of centre of the 7th lens image side surface of optical lens half Meet R12/R11=1.160 between the center curvature radius R11 of the 7th lens object side diameter R12 and optical lens.

Briefly, embodiment 1 to embodiment 3 meets relationship shown in following table 10 respectively.

Table 10

Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein Can technical characteristic replaced mutually and the technical solution that is formed.

Claims

1. optical lens, along optical axis by object side to image side sequentially include: the first lens, the second lens, the third lens, the 4th thoroughly Mirror, the 5th lens, the 6th lens and the 7th lens,

It is characterized in that,

First lens are the meniscus shaped lens with negative power, and object side is convex surface, and image side surface is concave surface；

Second lens have negative power, and object side is concave surface, and image side surface is concave surface；

The third lens have positive light coke, and object side is convex surface, and image side surface is convex surface；

4th lens have positive light coke, and object side is convex surface, and image side surface is convex surface；

5th lens have negative power, and object side is concave surface, and image side surface is concave surface；

6th lens have positive light coke, and object side is convex surface, and image side surface is convex surface；

7th lens are meniscus shaped lens, and object side is convex surface, and image side surface is concave surface.

2. optical lens according to claim 1, which is characterized in that the 7th lens have positive light coke or negative power.

3. optical lens according to claim 1, which is characterized in that the second lens and the third lens are mutually glued.

4. optical lens according to claim 1, which is characterized in that the 5th lens and the 6th lens are mutually glued.

5. optical lens according to claim 1, which is characterized in that the 4th lens, the 5th lens and the 6th lens are mutual It is glued.

6. optical lens according to claim 1, which is characterized in that in the first lens, the 6th lens and the 7th lens At least one be aspherical lens.

7. optical lens according to claim 1, which is characterized in that the effective radius of optical lens the first lens image side surface Meet -3≤(R2-R3)/(R2+R3)≤- 0.5 between R2 and the effective radius R3 of optical lens the second lens object side.

8. optical lens according to any one of claim 1 to 6, which is characterized in that the optical length TTL of optical lens Meet TTL/F≤4.5 between optical lens whole group focal length value F.

9. optical lens according to any one of claim 1 to 6, which is characterized in that second, third gluing of optical lens Meet 1.5≤F23/F≤4 between the focal length value F23 and optical lens whole group focal length value F of group lens.

10. optical lens according to any one of claim 1 to 6, which is characterized in that the 7th lens image side of optical lens Meet between the center curvature radius R11 of the 7th lens object side center curvature radius R12 and optical lens in face R12/R11≤ 2。

It by object side to image side sequentially include: the first lens, the second lens, the third lens, the 4th along optical axis 11. optical lens Lens, the 5th lens, the 6th lens and the 7th lens,

It is characterized in that,

Second lens have negative power；

The third lens have positive light coke；

4th lens have positive light coke；

5th lens have negative power；

6th lens have positive light coke；

7th lens are meniscus shaped lens, and object side is convex surface, and image side surface is concave surface；

The effective radius R2 of optical lens the first lens image side surface and effective radius R3 of optical lens the second lens object side it Between meet -3≤(R2-R3)/(R2+R3)≤- 0.5.