CN109960020A

CN109960020A - Optical lens

Info

Publication number: CN109960020A
Application number: CN201711405943.2A
Authority: CN
Inventors: 姜欢; 王东方; 姚波
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2017-12-22
Filing date: 2017-12-22
Publication date: 2019-07-02
Anticipated expiration: 2037-12-22
Also published as: CN109960020B; CN112882200A; CN112882200B

Abstract

This application discloses a kind of optical lens, the optical lens along optical axis by object side to image side sequentially can include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens.Wherein, the first lens can have negative power, and object side can be convex surface, and image side surface can be concave surface；Second lens can have negative power, and image side surface can be concave surface；The third lens can have positive light coke, and object side can be concave surface, and image side surface can be convex surface；4th lens can have positive light coke, and object side and image side surface can be convex surface；7th lens can have positive light coke, and object side and image side surface can be convex surface；And the 5th lens can with the 6th lens gluing.According to the optical lens of the application, it can be achieved that miniaturization, front end is small-bore, high-resolution and other effects.

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

With the universalness used, the high definition of the image of on-vehicle lens, picture comfort level are required to become increasingly conspicuous.At present Wide-angle lens is to reach mega pixel clarity, generallys use the aspherical aberration come including correcting comprising color difference, can pass through increasing Add lens numbers to 6 pieces or more to obtain high-resolution, but correspondingly camera lens volume and weight will increase, to be unfavorable for camera lens Miniaturization, and cost increase can be caused simultaneously.

Thus, such for monitoring camera or on-vehicle lens work under changeable, rugged environment, installation space it is limited Camera lens for, further promoted miniaturization, high-resolution it is such require more urgently with harshness.

Summary of the invention

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

The one aspect of the application provides such a optical lens, and the optical lens is along optical axis by object side to image side Sequentially can include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens.Its In, the first lens can have negative power, and object side can be convex surface, and image side surface can be concave surface；Second lens can have negative light Focal power, image side surface can be concave surface；The third lens can have positive light coke, and object side can be concave surface, and image side surface can be convex surface； 4th lens can have positive light coke, and object side and image side surface can be convex surface；7th lens can have positive light coke, object Side and image side surface can be convex surface；And the 5th lens can with the 6th lens gluing.

In one embodiment, the object side of the second lens can be convex surface.

In another embodiment, the object side of the second lens can be concave surface.

In one embodiment, the 5th lens can have positive light coke, and object side and image side surface can be convex surface.The Six lens can have negative power, and object side can be concave surface, and image side surface can be convex surface.

In one embodiment, optical lens can have at least four aspherical lens.Further, the second lens, Three lens and the 7th lens can be aspherical lens.

In one embodiment, the radius of curvature of the radius of curvature r31, the third lens image side surface of the third lens object side It can meet between r32 and the center thickness d3 of the third lens: 0.9≤(| r31 |+d3)/| r32 |≤1.5.

In one embodiment, the refractive index of the material of the first lens can be more than or equal to 1.7.

In one embodiment, the maximum field of view angle FOV of optical lens, corresponding to the maximum field of view angle of optical lens It can meet between image height h corresponding to the maximum clear aperture D of the object side of first lens and optical lens maximum field of view angle: D/h/FOV≤0.02。

In one embodiment, the center of the object side of the first lens to optical lens imaging surface on optical axis away from BFL/ can be met between distance BFL on optical axis from TTL and the imaging surface at the image side surface center of the 7th lens to optical lens TTL≥0.1。

In one embodiment, the center of the object side of the first lens to optical lens imaging surface on optical axis away from It can meet between image height h corresponding to maximum field of view angle from TTL, the maximum field of view angle FOV of optical lens and optical lens: TTL/h/FOV≤0.025。

The another aspect of the application provides such a optical lens, and the optical lens is along optical axis by object side to image side Sequentially can include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens.Its In, the first lens, the second lens and the 6th lens can have negative power；The third lens, the 4th lens, the 5th lens and the 7th Lens can have positive light coke；5th lens can be with the 6th lens gluing；And the object side of the third lens is concave surface, image side surface For convex surface, wherein distance TTL, optical frames of the imaging surface at the center of the object side of the first lens to optical lens on optical axis It can meet between image height h corresponding to the maximum field of view angle FOV of head and the maximum field of view angle of optical lens: TTL/h/FOV≤ 0.025。

In one embodiment, the object side of the second lens can be convex surface, and image side surface can be concave surface.

In another embodiment, the object side of the second lens can be concave surface, and image side surface can be concave surface.

In one embodiment, the object side of the 5th lens and image side surface can be convex surface.The object side of 6th lens It can be concave surface, image side surface can be convex surface.

In one embodiment, the object side of the first lens can be convex surface, and image side surface can be concave surface.

In one embodiment, the object side and image side surface of the 4th lens and the 7th lens can be convex surface.

The application uses such as seven lens, by the shape of optimal setting eyeglass, the light focus of each eyeglass of reasonable distribution Degree and balsaming lens etc. is formed, realizes the beneficial effects such as the small-bore front end of optical lens, high pixel, miniaturization.

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；

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

Fig. 4 is the structural schematic diagram for showing the optical lens according to the embodiment of the present application 4.

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, and it is glued saturating that the first balsaming lens is also known as second Mirror.

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).

First lens can have a negative power, and it can be concave surface that object side, which can be convex surface, image side surface,.First lens are set as The meniscus shape for being convex to object side can collect high angle scattered light as much as possible, and light is made to enter rear optical system.Actually answering In, it is contemplated that on-vehicle lens outdoor mounted use environment, it can be in the bad weathers such as sleet, such bent moon for being convex to object side Shape design, is conducive to the landing of water droplet, reduces the influence to imaging.Optionally, high-index material can be used in the first lens It is made, such as refractive index Nd1 >=1.7 of the first lens, further, Nd1 >=1.77 are conducive to reduce front end bore, improve Image quality.

Second lens can have negative power, and image side surface can be concave surface.The light that second lens can collect the first lens Line is compressed, and makes light smooth transition to rear optical system.The image side surface of second lens is concave surface, is conducive to reduction first The distance between lens and the second lens are easier to shorten the total physical length of camera lens, realize miniaturization.

The third lens can have positive light coke, and object side can be concave surface, and image side surface can be convex surface.The third lens can converge Light, make diverging light can smoothly enter into rear light system, while can balance by preceding two groups of eyeglasses introduce spherical aberration and Chromatism of position, and it is convex to the meniscus shape design of image side, be conducive to reduce optical system overall length.

4th lens can have positive light coke, and object side and image side surface can be convex surface.4th lens are set as biconvex Positive lens can compress light, make the smooth transition of light tendency to rear optical system.

5th lens can have positive light coke, and object side and image side surface can be convex surface.

6th lens can have negative power, and object side can be concave surface, and image side surface can be convex surface.

7th lens can have positive light coke, and object side and image side surface can be convex surface.7th lens are plus lens, The system of FNO≤2 can be met, at the same reduce marginal ray reach imaging surface light path, can with the off-axis point aberration of correction system, Optimize the optical properties such as distortion, key light angle CRA.

In the exemplary embodiment, can the light for limiting light beam be for example set between the 4th lens and the 5th lens Door screen, to further increase the image quality of camera lens.When diaphragm to be set between the 4th lens and the 5th lens, before can collecting Light afterwards, effectively shortens optical system overall length, reduces the bore of front and back eyeglass.

As it is known to the person skilled in the art, balsaming lens can be used for reducing color difference to the maximum extent or eliminate color difference.? The reflection loss that image quality can be improved using balsaming lens in optical lens, reduce light energy, to promote the clear of lens imaging Clear degree.In addition, the use of balsaming lens can also simplify the linkage editor in camera lens manufacturing process.

In the exemplary embodiment, can by the way that the object side of the image side surface of the 5th lens and the 6th lens is glued, and By the 5th lens and the 6th lens combination at balsaming lens.It is saturating by introducing the gluing being made of the 5th lens and the 6th lens Mirror can help to eliminate color difference influence, reduce the curvature of field, correct coma；Meanwhile balsaming lens can be with residual fraction color difference with flat The whole color difference for the optical system that weighs.The airspace between two eyeglasses is omitted in the gluing of eyeglass, so that optical system overall is tight It gathers, meets system compact demand.Also, eyeglass gluing can reduce lens unit because group stand during generate inclination/ The tolerance sensitivities problem such as core shift.

In balsaming lens, the 5th lens close to object side have positive light coke, and the 6th lens close to image side have negative Focal power, such be provided with are conducive to that rear optical system will be transitted to again after the light of front diaphragm further converges, Reduce camera lens rear end bore/size, reduces system overall length.

In the exemplary embodiment, the curvature of the radius of curvature r31, the third lens image side surface of the third lens object side half It can meet between diameter r32 and the center thickness d3 of the third lens: 0.9≤(| r31 |+d3)/| r32 |≤1.5；More specifically, into One step can meet 1.28≤(| r31 |+d3)/| r32 |≤1.36.Shape as the third lens setting, can be conducive to promoted at Image quality amount shortens camera lens overall length.

In the exemplary embodiment, the maximum field of view angle FOV of optical lens, corresponding to the maximum field of view angle of optical lens The first lens object side maximum clear aperture D and optical lens maximum field of view angle corresponding to can expire between image height h Sufficient D/h/FOV≤0.02, more specifically, can further satisfaction D/h/FOV≤0.018.Meet conditional D/h/FOV≤0.02, It is small-bore that camera lens front end can be achieved.

In the exemplary embodiment, between the optic back focal BFL of optical lens and the optics total length TTL of optical lens BFL/TTL >=0.1 can be met, more specifically, can further satisfaction BFL/TTL >=0.106.Meet conditional BFL/TTL >=0.1 Rear burnt setting, the assembling of optical system can be conducive to.

In the exemplary embodiment, the optics total length TTL of optical lens, optical lens maximum field of view angle FOV with And TTL/h/FOV≤0.025 can be met between image height h corresponding to optical lens maximum field of view angle, more specifically, can be further Meet TTL/h/FOV≤0.023.Meet conditional TTL/h/FOV≤0.025, it can be achieved that minimizing, and in same field angle Same imaging surface under TTL it is shorter.

In the exemplary embodiment, eyeglass used by optical lens can be the eyeglass of plastic material, can also be The eyeglass of glass material.Since the eyeglass thermal expansion coefficient of plastic material is larger, the variation of ambient temperature used in the camera lens compared with When big, the lens of plastic material can affect greatly the overall performance of camera lens.And the eyeglass of glass material is used, it can reduce Influence of the temperature to lens performance.Glass lens can be used in first lens of optical lens according to the present invention, to reduce environment Influence to system entirety, the overall performance of improving optical camera lens.

In the exemplary embodiment, the second lens, the third lens and the 7th lens can be arranged as aspherical lens.It can First lens can be also arranged as aspherical lens by selection of land.Still optionally further, 4 aspheric can be at least set in optical lens Face eyeglass.The characteristics of aspherical lens, is: being consecutive variations from center of lens to periphery curvature.With from center of lens to periphery Have the spheric glass of constant curvature different, aspherical lens have more preferably radius of curvature characteristic, have improve distort aberration and The advantages of improving astigmatic image error.After aspherical lens, the aberration occurred when imaging can be eliminated as much as possible, from And promote the image quality of camera lens.Further, the first lens can be configured to Glass aspheric eyeglass, so that high-resolution is mentioned, into One step reduces front end bore.In addition, the 7th lens using aspherical, may make light effectively can smoothly converge finally, Mitigate the overall weight and cost of optical system.

There are the optics such as small-bore front end, high-resolution, miniaturization according to the optical lens of the above embodiment of the application Characteristic can conform better to the requirement of on-vehicle lens.

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 lens with negative power, and object side S1 is convex surface, and image side surface S2 is concave surface.

Second lens L2 is the meniscus lens with negative power, and object side S3 is convex surface, and image side surface S4 is concave surface.

The third lens L3 is the meniscus lens with positive light coke, and object side S5 is concave surface, and image side surface S6 is convex surface.

4th lens L4 is the biconvex lens with positive light coke, and object side S7 is convex surface, and image side surface S8 is convex surface.

5th lens L5 is the biconvex lens with positive light coke, and object side S10 is convex surface, and image side surface S11 is convex surface. 6th lens L6 is the meniscus lens with negative power, and object side S11 is concave surface, and image side surface S12 is convex surface.Wherein, Five lens L5 and the 6th lens L6 gluing unit are at balsaming lens.

7th lens L7 is the biconvex lens with positive light coke, and object side S13 is convex surface, and image side surface S14 is convex surface.

Optionally, which may also include the optical filter L8 with object side S15 and image side surface S16 and has object The protection lens L9 of side S17 and image side surface S18.Optical filter L8 can be used for correcting color error ratio.Protection lens L9 can be used for protecting Shield is located at the image sensor chip of imaging surface IMA.Light from object sequentially pass through each surface S1 to S18 and be ultimately imaged at On image planes S19.

In the optical lens of the present embodiment, diaphragm STO can be set between the 4th lens L4 and the 5th lens L5 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 number	Radius of curvature R	Thickness T	Refractive index Nd	Abbe number Vd
					1	11.8359	1.1000	1.80	46.57
2	3.9412	2.5500
					3	28.3264	0.8079	1.51	55.82
4	1.3052	1.9664
					5	-4.1516	0.9987	1.54	56.00
6	-3.9987	0.1000
					7	8.1502	2.1492	1.93	22.68
8	-11.5209	0.5677
					STO	It is infinite	0.2095
10	4.2787	1.8907	1.54	56.00
					11	-1.0988	0.9347	1.62	23.53
12	-33.8266	0.1064
					13	3.3522	1.5489	1.52	56.00
14	-2.9227	0.1064
					15	It is infinite	0.5500	1.52	64.17
16	It is infinite	0.4787
					17	It is infinite	0.4000	1.52	64.17
18	It is infinite	0.2289
					IMA	It is infinite

The present embodiment uses seven lens as an example, by each power of lens of reasonable distribution and face type, respectively Airspace between the center thickness of lens and each lens can make camera lens that there is small-bore front end, miniaturization, high-resolution etc. to have Beneficial effect.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 the aspherical lens surface S3 that can be used in embodiment 1, The circular cone coefficient k and high-order coefficient A, B, C, D and E of S4, S5, S6, S10, S11, S12, S13 and S14.

Table 2

Face number

K

A

B

C

D

E

3

49.7000

-1.5267E-03

-6.7563E-05

1.2668E-06

1.7110E-07

-1.2777E-08

4

-0.8912

7.9002E-04

1.1238E-03

-4.3218E-04

-8.2079E-05

1.9265E-05

5

-0.3142

-1.9690E-04

9.5798E-04

2.7260E-04

3.9233E-05

-7.3771E-06

6

-1.3320

2.3566E-03

5.0151E-04

1.9507E-04

5.5387E-05

-6.8043E-06

10

15.2000

-1.3531E-02

2.1254E-02

-7.1028E-02

6.8880E-02

-3.6462E-02

11

-0.2165

-6.5527E-02

-8.7618E-02

1.0102E-01

2.9742E-03

-3.8093E-02

12

224.5085

-3.1053E-02

1.4228E-02

-1.3631E-04

-2.6178E-04

-5.5705E-05

13

-13.2813

2.5503E-03

3.3616E-03

5.3349E-04

5.4807E-05

-1.9708E-05

14

-8.1851

-9.3079E-03

7.5116E-03

-1.5040E-04

-4.4714E-04

1.8281E-04

The following table 3 gives the whole group focal length value F of the optical lens of embodiment 1, the refractive index Nd1 of the first lens L1, third The radius of curvature r31 of the object side S5 of lens L3, the radius of curvature r32 of the image side surface S6 of the third lens L3, the third lens L3 Center thickness d3, optical lens maximum field of view angle corresponding to the first lens L1 object side S1 maximum clear aperture D, light Learn the optic back focal BFL of image height h corresponding to the maximum field of view angle of camera lens, the maximum field of view angle FOV of optical lens, optical lens (that is, distance on the center to the axis to imaging surface S19 of the image side surface S14 of the 7th lens L7 of the last one lens) and optical frames The optics total length TTL (that is, from distance on the center to the axis of imaging surface S19 of the object side S1 of the first lens L1) of head.

Table 3

F(mm)	0.947	h(mm)	3.874
				Nd1	1.8	FOV(°)	190
\|r31\|(mm)	4.152	BFL(mm)	1.764
				\|r32\|(mm)	3.999	TTL(mm)	16.694
d3(mm)	0.999
				D(mm)	13.096

In the present embodiment, the radius of curvature r31 of the object side S5 of the third lens L3, the image side surface S6 of the third lens L3 Meet between radius of curvature r32 and the center thickness d3 of the third lens L3 (| r31 |+d3)/| r32 |=1.288；Optical lens Maximum field of view angle FOV, optical lens maximum field of view angle corresponding to the first lens L1 object side S1 maximum clear aperture D And meet D/h/FOV=0.018 between image height h corresponding to optical lens maximum field of view angle；The optic back focal of optical lens Meet BFL/TTL=0.106 between BFL and the optics total length TTL of optical lens；And the optics total length of optical lens Meet TTL/h/ between image height h corresponding to TTL, the maximum field of view angle FOV of optical lens and optical lens maximum field of view angle FOV=0.023.

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 of face lens surface S3, S4, S5, S6, S10, S11, S12, S13 and S14 and E.The following table 6 gives the whole group focal length value F of the optical lens of embodiment 2, the refractive index Nd1 of the first lens L1, the third lens L3 The radius of curvature r31 of object side S5, the radius of curvature r32 of image side surface S6 of the third lens L3, the center of the third lens L3 it is thick Spend maximum clear aperture D, the optical lens of the object side S1 of the first lens L1 corresponding to the maximum field of view angle of d3, optical lens Maximum field of view angle corresponding to image height h, the maximum field of view angle FOV of optical lens, optical lens optic back focal BFL (that is, most Distance on the center to the axis to imaging surface S19 of the image side surface S14 of the 7th lens L7 of the latter lens) and optical lens light It learns total length TTL (that is, from distance on the center to the axis of imaging surface S19 of the object side S1 of the first lens L1).

Table 4

Face number	Radius of curvature R	Thickness T	Refractive index Nd	Abbe number Vd
					1	16.1324	1.1000	1.80	46.57
2	4.7165	2.1835
					3	30.2897	0.9256	1.52	56.25
4	1.3338	1.8050
					5	-3.8846	1.0125	1.54	56.00
6	-3.6551	0.1000
					7	7.7375	1.6011	1.92	20.88
8	-12.8232	0.6871
					STO	It is infinite	0.0542
10	4.2928	1.8845	1.54	56.00
					11	-1.1067	1.0420	1.64	23.69
12	-36.4682	0.1064
					13	3.2426	1.6344	1.54	56.00
14	-4.7298	0.1064
					15	It is infinite	0.5500	1.52	64.21
16	It is infinite	0.4787
					17	It is infinite	0.4000	1.52	64.21
18	It is infinite	0.8074
					IMA	It is infinite

Table 5

Face number

K

A

B

C

D

E

3

45.3762

-1.7313E-03

-6.9507E-05

1.9348E-06

2.1201E-07

-1.0117E-08

4

-0.8330

7.6227E-03

1.5601E-03

-4.7999E-04

-1.0569E-04

1.3172E-05

5

-0.4836

1.7166E-04

1.1493E-03

3.0162E-04

3.7390E-05

-1.0723E-05

6

-1.3223

2.2613E-03

5.6207E-04

2.0882E-04

5.2808E-05

-9.3197E-06

10

15.1211

-1.2954E-02

2.2825E-02

-6.8482E-02

7.0016E-02

-4.0414E-02

11

-0.2752

-2.2889E-01

-9.5749E-02

8.9231E-02

1.5968E-03

-2.7414E-02

12

33.5086

-3.5300E-02

1.4464E-02

-4.1328E-05

-2.0769E-04

-2.6000E-05

13

-13.4973

2.2902E-03

3.3370E-03

5.3400E-04

2.2633E-05

-2.3497E-05

14

-21.8467

-9.8810E-03

7.0962E-03

-1.8273E-04

-4.7891E-04

1.9708E-04

Table 6

In the present embodiment, the radius of curvature r31 of the object side S5 of the third lens L3, the image side surface S6 of the third lens L3 Meet between radius of curvature r32 and the center thickness d3 of the third lens L3 (| r31 |+d3)/| r32 |=1.34；Optical lens Maximum field of view angle FOV, optical lens maximum field of view angle corresponding to the first lens L1 object side S1 maximum clear aperture D And meet D/h/FOV=0.015 between image height h corresponding to optical lens maximum field of view angle；The optic back focal of optical lens Meet BFL/TTL=0.142 between BFL and the optics total length TTL of optical lens；And the optics total length of optical lens Meet TTL/h/ between image height h corresponding to TTL, the maximum field of view angle FOV of optical lens and optical lens maximum field of view angle FOV=0.021.

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.

Second lens L2 is the biconcave lens with negative power, and object side S3 is concave surface, and image side surface S4 is concave surface.

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 of face lens surface S3, S4, S5, S6, S10, S11, S12, S13 and S14 and E.The following table 9 gives the whole group focal length value F of the optical lens of embodiment 3, the refractive index Nd1 of the first lens L1, the third lens L3 The radius of curvature r31 of object side S5, the radius of curvature r32 of image side surface S6 of the third lens L3, the center of the third lens L3 it is thick Spend maximum clear aperture D, the optical lens of the object side S1 of the first lens L1 corresponding to the maximum field of view angle of d3, optical lens Maximum field of view angle corresponding to image height h, the maximum field of view angle FOV of optical lens, optical lens optic back focal BFL (that is, most Distance on the center to the axis to imaging surface S19 of the image side surface S14 of the 7th lens L7 of the latter lens) and optical lens light It learns total length TTL (that is, from distance on the center to the axis of imaging surface S19 of the object side S1 of the first lens L1).

Table 7

Table 8

Face number

K

A

B

C

D

E

3

193.5487

-1.3734E-03

-5.1041E-05

2.7037E-06

2.6214E-07

-8.4969E-09

4

-0.8872

1.5512E-03

7.8103E-04

-5.0791E-04

-9.6839E-05

2.1300E-05

5

-0.2415

-4.4017E-04

1.0168E-03

2.5419E-04

2.8715E-05

-1.1446E-05

6

-1.3942

2.3865E-03

6.4629E-04

2.4325E-04

5.8463E-05

-9.3484E-06

10

15.1616

-1.5033E-02

2.0415E-02

-7.0694E-02

6.9410E-02

-3.7700E-02

11

-0.3055

-3.4305E-02

-8.1210E-02

8.7743E-02

-4.7084E-03

-5.1876E-01

12

-48.4153

-3.1106E-02

1.4471E-02

-1.3628E-04

-1.7373E-04

-4.2895E-05

13

-12.3131

3.0534E-03

3.5193E-03

5.7301E-04

2.8285E-05

-2.0489E-05

14

-12.6192

-1.0674E-02

7.4156E-03

-1.4011E-04

-4.4127E-04

1.7619E-04

Table 9

F(mm)	1.029	h(mm)	4.090
				Nd1	1.81	FOV(°)	190
\|r31\|(mm)	4.357	BFL(mm)	2.641
				\|r32\|(mm)	4.104	TTL(mm)	16.980
d3(mm)	0.895
				D(mm)	13.326

In the present embodiment, the radius of curvature r31 of the object side S5 of the third lens L3, the image side surface S6 of the third lens L3 Meet between radius of curvature r32 and the center thickness d3 of the third lens L3 (| r31 |+d3)/| r32 |=1.28；Optical lens Maximum field of view angle FOV, optical lens maximum field of view angle corresponding to the first lens L1 object side S1 maximum clear aperture D And meet D/h/FOV=0.017 between image height h corresponding to optical lens maximum field of view angle；The optic back focal of optical lens Meet BFL/TTL=0.156 between BFL and the optics total length TTL of optical lens；And the optics total length of optical lens Meet TTL/h/ between image height h corresponding to TTL, the maximum field of view angle FOV of optical lens and optical lens maximum field of view angle FOV=0.022.

Embodiment 4

The optical lens according to the embodiment of the present application 4 is described referring to Fig. 4.In the present embodiment and following embodiment In, for brevity, by clipped description similar to Example 1.Fig. 4 shows the optics according to the embodiment of the present application 4 The structural schematic diagram of camera lens.

As shown in figure 4, 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 10 show the radius of curvature R of each lens of the optical lens of embodiment 4, 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 11 show can be used for it is non-in embodiment 4 The circular cone coefficient k and high-order coefficient A, B, C, D of spherical lens surfaces S3, S4, S5, S6, S10, S11, S12, S13 and S14 And E.The following table 12 gives the whole group focal length value F of the optical lens of embodiment 4, the refractive index Nd1 of the first lens L1, the third lens The center of the radius of curvature r31 of the object side S5 of L3, the radius of curvature r32 of the image side surface S6 of the third lens L3, the third lens L3 Thickness d 3, optical lens maximum field of view angle corresponding to the first lens L1 object side S1 maximum clear aperture D, optical frames Head maximum field of view angle corresponding to image height h, the maximum field of view angle FOV of optical lens, optical lens optic back focal BFL (that is, Distance on the center to the axis to imaging surface S19 of the image side surface S14 of the 7th lens L7 of the last one lens) and optical lens Optics total length TTL (that is, from distance on the center to the axis of imaging surface S19 of the object side S1 of the first lens L1).

Table 10

Table 11

Face number

K

A

B

C

D

E

3

48.3710

-1.5211E-03

-5.9786E-05

1.6173E-06

2.0960E-07

-1.2164E-08

4

-0.8936

2.5030E-03

1.7429E-03

-3.8959E-04

-1.2831E-04

1.2325E-05

5

-0.3806

-1.1746E-03

1.2035E-03

2.5552E-04

2.8892E-05

-1.0497E-05

6

-1.7364

2.8474E-03

5.9910E-04

3.1170E-04

7.8269E-05

-1.6890E-05

10

15.0158

-1.2253E-02

2.4526E-02

-7.1215E-02

6.9028E-02

-3.6212E-02

11

-0.2778

-4.2927E-02

-8.5696E-02

9.2290E-02

1.6326E-02

-4.6570E-02

12

181.3388

-3.0771E-02

1.4129E-02

-1.7695E-04

-2.5569E-04

-1.8752E-05

13

-18.2507

-3.7906E-04

2.9890E-03

4.8689E-04

2.4625E-05

-1.5584E-05

14

-9.3934

-1.2065E-02

8.4960E-03

-1.3838E-05

-4.8465E-04

1.3560E-04

Table 12

F(mm)	1.084	h(mm)	4.356
				Nd1	1.77	FOV(°)	194
\|r31\|(mm)	4.566	BFL(mm)	1.905
				\|r32\|(mm)	3.998	TTL(mm)	14.662
d3(mm)	0.862
				D(mm)	12.028

In the present embodiment, the radius of curvature r31 of the object side S5 of the third lens L3, the image side surface S6 of the third lens L3 Meet between radius of curvature r32 and the center thickness d3 of the third lens L3 (| r31 |+d3)/| r32 |=1.358；Optical lens Maximum field of view angle FOV, optical lens maximum field of view angle corresponding to the first lens L1 object side S1 maximum clear aperture D And meet D/h/FOV=0.014 between image height h corresponding to optical lens maximum field of view angle；The optic back focal of optical lens Meet BFL/TTL=0.13 between BFL and the optics total length TTL of optical lens；And the optics total length of optical lens Meet TTL/h/ between image height h corresponding to TTL, the maximum field of view angle FOV of optical lens and optical lens maximum field of view angle FOV=0.017.

To sum up, embodiment 1 to embodiment 4 meets relationship shown in following table 13 respectively.

Table 13

Conditional/embodiment	1	2	3	4
					(\|r31\|+d3)/\|r32\|	1.288	1.340	1.280	1.358
D/h/FOV	0.018	0.015	0.017	0.014
					BFL/TTL	0.106	0.142	0.156	0.130
TTL/h/FOV	0.023	0.021	0.022	0.017

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

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

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

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

7th lens have positive light coke, and object side and image side surface are convex surface；And

5th lens and the 6th lens are glued.

2. optical lens according to claim 1, which is characterized in that the object side of second lens is convex surface.

3. optical lens according to claim 1, which is characterized in that the object side of second lens is concave surface.

4. optical lens according to claim 1, which is characterized in that the 5th lens have positive light coke, object side Face and image side surface are convex surface.

5. optical lens according to claim 1, which is characterized in that the 6th lens have negative power, object side Face is concave surface, and image side surface is convex surface.

6. optical lens according to claim 1, which is characterized in that the optical lens has at least four aspherical mirror Piece.

7. optical lens according to claim 6, which is characterized in that second lens, the third lens and described 7th lens are aspherical lens.

8. optical lens described in any one of -7 according to claim 1, which is characterized in that the song of the third lens object side Meet between rate radius r31, the radius of curvature r32 of the third lens image side surface and the center thickness d3 of the third lens: 0.9≤(|r31|+d3)/|r32|≤1.5。

9. optical lens described in any one of -7 according to claim 1, which is characterized in that the folding of the material of first lens Rate is penetrated more than or equal to 1.7.

10. optical lens described in any one of -7 according to claim 1, which is characterized in that the maximum view of the optical lens Rink corner FOV, the optical lens maximum field of view angle corresponding to first lens object side maximum clear aperture D with And meet between image height h corresponding to optical lens maximum field of view angle: D/h/FOV≤0.02.

11. optical lens described in any one of -7 according to claim 1, which is characterized in that the object side of first lens Center to the optical lens distance TTL of the imaging surface on the optical axis and the 7th lens image side surface center extremely The imaging surface of the optical lens meets BFL/TTL >=0.1 between the distance BFL on the optical axis.

12. optical lens described in any one of -7 according to claim 1, which is characterized in that the object side of first lens Center to distance TTL of the imaging surface on the optical axis of the optical lens, the maximum field of view angle FOV of the optical lens And meet between image height h corresponding to the maximum field of view angle of the optical lens: TTL/h/FOV≤0.025.

It by object side to image side sequentially include: the first lens, the second lens, the third lens, the 4th along optical axis 13. optical lens Lens, the 5th lens, the 6th lens and the 7th lens,

It is characterized in that,

First lens, second lens and the 6th lens have negative power；

The third lens, the 4th lens, the 5th lens and the 7th lens have positive light coke；

5th lens and the 6th lens are glued；And

The object side of the third lens is concave surface, and image side surface is convex surface,

Wherein, the center of the object side of first lens to the optical lens distance of the imaging surface on the optical axis Between image height h corresponding to the maximum field of view angle of TTL, the maximum field of view angle FOV of the optical lens and the optical lens Meet: TTL/h/FOV≤0.025.