CN110456475A

CN110456475A - Optical lens

Info

Publication number: CN110456475A
Application number: CN201810433287.5A
Authority: CN
Inventors: 王东方; 姜欢; 姚波
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2018-05-08
Filing date: 2018-05-08
Publication date: 2019-11-15

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 is convex surface, and image side surface is concave surface；Second lens can have negative power, and object side is convex surface, and image side surface is concave surface；The third lens can have positive light coke, and object side is concave surface, and image side surface is convex surface；4th lens can have positive light coke；And the 7th lens can have positive light coke or negative angular, wherein the 5th lens and the glue-bondable composition balsaming lens of the 6th lens.At least one beneficial effect during according to the optical lens of the application, it can be achieved that high-resolution, low sensitivity, high illumination, chief ray angle are small etc..

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

As science and technology is more and more mature, the emerging technologies such as unmanned also will be more more and more universal, the imaging to camera lens It is required that also will be higher and higher.Especially Vehicle-carrying type steel camera lens, solution to the direction 8M, 12M as gradually being promoted.Current more and more fields It needs to be carried out under visual field extension, especially adverse circumstances with camera lens.Therefore, the stabilization of camera lens retention property at different temperatures Property is particularly important.

In conventional camera lens, first piece of eyeglass is typically exposed in air, is influenced by environmental factor, and the first eyeglass easily occurs Impaired aging conditions, influence camera lens whole service life；And general camera lens is in the state that temperature is raised and lowered, camera lens Optimum image plane can shift, and the phenomenon that image blur occur, therefore the high-resolution under different temperatures also becomes front view lens One indispensable performance.

In the prior art, high-resolution can be obtained by the way that lens numbers are increased to 6-7 pieces or more, but this will affect mirror Head miniaturization, the realization of low cost.When using aspherical correction aberration, if plastic aspherical element, due to plastics thermal expansion coefficient It is larger, there is a problem of that temperature change easily causes image planes out of focus to obscure；According to Glass aspheric, then cost is excessively high.

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 is convex surface, and image side surface is concave surface；Second lens can have negative power, Its object side is convex surface, and image side surface is concave surface；The third lens can have positive light coke, and object side is concave surface, and image side surface is convex Face；4th lens can have positive light coke；And the 7th lens can have positive light coke or negative angular, wherein the 5th lens With the glue-bondable composition balsaming lens of the 6th lens.

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

In another embodiment, the 4th lens can be meniscus lens, and object side is convex surface, and image side surface is concave surface.

In one embodiment, the 5th lens can have negative power, and object side and image side surface can be concave surface.

In another embodiment, the 5th lens can be the meniscus lens with negative power, and object side is convex surface, as Side is concave surface.

In one embodiment, the 6th lens can have positive light coke, and object side and image side surface can be convex surface.

In one embodiment, the 7th lens can be meniscus lens, and object side can be convex surface, and image side surface can be recessed Face.

In another embodiment, the 7th lens can be meniscus lens, and object side can be concave surface, and image side surface can be convex Face.

In one embodiment, any one or more of first lens to the 7th lens can be glass lens.

In another embodiment, any one or more of first lens to the 7th lens can be glass lens.

In one embodiment, one or more of second lens to the 7th lens can be aspherical lens.

In another embodiment, one or more of second lens to the 7th lens can be spheric glass.

In one embodiment, conditional can be met: D/H/FOV≤0.045, wherein FOV is the maximum of optical lens Field angle；D is the maximum clear aperture of the first lens object side corresponding to the maximum field of view angle of optical lens；And H is light Learn image height corresponding to the maximum field of view angle of camera lens.

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 TTL and the whole group focal length value F of optical lens: 0.08≤F/TTL≤0.2.

In one embodiment, conditional can be met: BFL/TTL >=0.08, wherein BFL is the image side of the 7th lens The center in face to optical lens distance of the imaging surface on optical axis；And TTL is the center of the object side of the first lens to light Learn distance of the imaging surface of camera lens on optical axis.

In one embodiment, between the radius of curvature R 1 of the object side of the first lens and the radius of curvature R 2 of image side surface It can meet: R1/R2≤2.3.

In one embodiment, the change rate that the Refractive Index of Material of the 6th lens varies with temperature can meet conditional: dn/dt(6)≤-5×10^-6/℃。

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 5th lens can have negative power；The third lens, the 4th lens and the 6th lens are equal There can be positive light coke；7th lens can have positive light coke or negative power；And the 5th lens and the 6th lens it is glue-bondable Form balsaming lens, wherein can meet between the radius of curvature R 1 of the object side of the first lens and the radius of curvature R 2 of image side surface: R1/R2≤2.3。

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 of the second lens can be convex surface, and image side surface can be concave surface.

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

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

In another embodiment, the 5th lens can be meniscus lens, and object side is convex surface, and image side surface is concave surface.

In one embodiment, the object side of the 6th lens and image side surface 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 etc. realizes at least one in the beneficial effects such as the high-resolution of optical lens, low sensitivity, high illumination, chief ray angle (CRA) be small It is a.

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, 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,.Increase by the first lens, It can be conducive to mention high-resolution, the meniscus shape that the first lens are set as being convex to object side can collect big field rays as much as possible, Light is set to enter rear optical system.In practical applications, it is contemplated that on-vehicle lens outdoor mounted use environment can be in sleet Equal bad weathers are convex to the meniscus shape design of object side in this way, are more applicable in the environment such as sleet, are conducive to the landing of water droplet, from And reduce influence of the external environment to imaging.

Second lens can have negative power, and object side can be convex surface, and image side surface can be concave surface.Second lens are convex to object The meniscus shape of side can collect big field rays as much as possible, and light is made to enter rear optical system.

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 Poly- front light enables light steadily to enter rear optical system.

4th lens can be biconvex or meniscus lens with positive light coke.4th lens can converge light, make to dissipate Light can smoothly enter into rear optical system.

5th lens can be concave-concave or meniscus lens with negative power.

6th lens can have positive light coke, and object side and image side surface can be convex surface.

7th lens can be the meniscus lens with positive light coke or negative power.7th lens can converge marginal ray, Reduce the light path that marginal ray reaches system imaging face, the optics such as distortion, CRA can be optimized with the off-axis point aberration of correction system Performance allows marginal ray gently to reach chip by the 7th lens, promotes illumination.

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.In 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 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 four lens and the 5th lens, can effectively collect Front and back light shortens optical system overall length, reduces the bore of front and back lens set.

In the exemplary embodiment, the maximum field of view angle FOV of optical lens, corresponding to optical lens maximum field of view angle It can meet between image height H corresponding to the maximum clear aperture D of first lens object side and optical lens maximum field of view angle: D/ H/FOV≤0.045, it is more desirable that D, H and FOV can further meet D/H/FOV≤0.04.Meet conditional D/H/FOV≤ 0.045, it is ensured that the front end of camera lens is small-bore.

In the exemplary embodiment, between the optics total length TTL of optical lens and the whole group focal length value F of optical lens Meet: 0.08≤F/TTL≤0.2, it is more desirable that TTL and F can further meet 0.1≤F/TTL≤0.18.Meet conditional 0.08≤F/TTL≤0.2, it is ensured that the small size performance of camera lens.

In the exemplary embodiment, between the optic back focal BFL of optical lens and the optics total length TTL of optical lens BFL/TTL >=0.08 can be met, further, BFL and TTL can further meet BFL/TTL >=0.085.Meet conditional BFL/TTL >=0.08 can improve the image quality of camera lens.

In the exemplary embodiment, between the radius of curvature R 1 of the first lens object side and the radius of curvature R 2 of image side surface Meet: R1/R2≤2.3, it is more desirable that can further satisfaction R1/R2≤2.2.It, can by rationally managing the shape of the first lens The susceptibility of the first lens is reduced, increases feasibility of first lens as replaceable protective cover, increases the service life of camera lens.

In the exemplary embodiment, the variable quantity that the Refractive Index of Material of the 6th lens varies with temperature should meet: dn/dt (6)≤-5×10^-6/℃.By varying with temperature the reasonable distribution of characteristic to the 6th lens strength and Refractive Index of Material, can support Disappear because of optic back focal varying effect caused by mechanism member is expanded with heat and contract with cold, so that camera lens is in always on preferable imaging surface, it can Meeting resolution of the camera lens within the scope of different temperatures can require.

In the exemplary embodiment, one or more of second lens to the 7th lens can be spheric glass or non- Spheric glass.The characteristics of aspherical lens, is: being consecutive variations from center of lens to periphery curvature.With from center of lens to week While there is the spheric glass of constant curvature different, aspherical lens have more preferably radius of curvature characteristic, have to improve and 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, To promote the image quality of camera lens.It is desirable that the second lens/the third lens/the 4th lens/the 7th lens can be aspherical Eyeglass is reduced aberration with further increasing solution picture.It is desirable that the 5th lens and the 6th lens can be aspherical lens, with into One step mentions high-resolution.

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 cause the optic back focal variable quantity of camera lens larger.And the eyeglass of glass material is used, it can reduce Temperature is to influence burnt after lens optical.It is desirable that can be glass mirror according to any lens in the optical lens of the application Piece reduces influence of the environment to system entirety, the entirety of improving optical camera lens to enhance performance of the camera lens in high/low temperature Performance.

It can be improved by using seven pieces of glass lens into image quality according to the optical lens of the above embodiment of the application Amount up to the solution picture of 12M, while guaranteeing that performance is stablized under different temperatures；By reasonably selecting lens materials, improve whole vulcanize It repays；By control the first lens shape, reduce the first lens eyeglass susceptibility, provide the first lenses it is replaceable can Energy property, promotes the service life of entire camera lens；By reasonable distribution focal power, so that optical system overall realization CRA is small, illumination It is promoted, picture reduction degree height, to be applicable in the use demand of vehicle environment well.

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.Separately Outside, the second lens L2 is aspherical lens, and object side S3 and image side surface S4 are aspherical.

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.Separately Outside, the third lens L3 is aspherical lens, and object side S5 and image side surface S6 are aspherical.

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

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

7th lens L7 is the meniscus lens with negative power, and object side S13 is convex surface, and image side surface S14 is concave surface. In addition, the 7th lens L7 is aspherical lens, object side S13 and image side surface S14 are aspherical.

Optionally, which may also include the optical filter L8 with object side S15 and image side surface S16 and has object side The protection lens L9 of face 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 Positioned at the image sensor chip of imaging surface IMA.Light from object sequentially passes through each surface S1 to S18 and is ultimately imaged and is being imaged On the IMA of face.

In the optical lens of the present embodiment, can between the 4th lens L4 and the 5th lens L5 (that is, the 4th lens L4 with Between balsaming lens) diaphragm STO is set to improve image 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

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 have high-resolution, low sensitivity, high illumination, CRA small Etc. at least one of beneficial effects.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 shows 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 S8, S13, S14.

Table 2

Face number

K

A

B

C

D

E

3

0.3884

3.7137E-05

-2.2109E-06

1.0417E-08

-1.0620E-11

-3.5708E-14

4

-0.0300

6.6738E-05

-3.5816E-06

-5.7127E-09

2.1129E-10

-1.0992E-12

5

-2.8404

-8.5885E-05

-1.2448E-07

-4.2328E-09

-3.6815E-11

6.7198E-13

6

-3.5462

-3.9883E-05

-1.2163E-07

1.4873E-09

-7.2510E-12

2.0302E-14

7

-2.8715

1.4572E-04

-5.9234E-07

6.6790E-09

-1.5171E-11

1.2929E-13

8

-17.6078

2.8359E-05

1.3606E-06

-3.7829E-08

1.0364E-09

-9.3489E-12

13

222.7800

-1.7174E-04

-7.4773E-07

3.4415E-09

-7.9982E-11

2.7361E-12

14

38.9640

-2.1431E-04

-1.7119E-06

3.0826E-08

-2.0153E-10

8.2117E-13

The following table 3 give the whole group focal length value F of the optical lens of embodiment 1, 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), maximum field of view angle FOV, the light of optical lens Learn maximum clear aperture D, the optical lens maximum field of view of the object side S1 of the first lens L1 corresponding to camera lens maximum field of view angle The optic back focal BFL of image height H, optical lens corresponding to angle are (that is, from the image side surface S14 of the 7th lens L7 of the last one lens Center to the axis of imaging surface S19 on distance), the curvature of the radius of curvature R 1 of the object side S1 of the first lens L1 and image side surface S2 The variable quantity dn/dt (6) that the Refractive Index of Material of radius R2 and the 6th lens L6 vary with temperature.

Table 3

F(mm)	10.780	R1(mm)	29.000
				TTL(mm)	78.630	R2(mm)	19.020
FOV(°)	70	dn/dt(6)	-2.02E-05
				D(mm)	26.910
H(mm)	12.706
				BFL(mm)	7.650

In the present embodiment, meet F/ between the optics total length TTL of optical lens and the whole group focal length value F of optical lens TTL=0.137；Meet BFL/TTL=between the optic back focal BFL of optical lens and the optics total length TTL of optical lens 0.097；The object side of first lens L1 corresponding to the maximum field of view angle FOV of optical lens, optical lens maximum field of view angle Meet D/H/FOV=0.030 between image height H corresponding to the maximum clear aperture D of S1 and optical lens maximum field of view angle；With And first lens L1 the radius of curvature R 1 of object side S1 and the radius of curvature R 2 of image side surface S2 between meet R1/R2=1.525.

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.

4th lens L4 is the meniscus lens with positive light coke, and object side S7 is convex surface, and image side surface S8 is concave surface.Separately Outside, the 4th lens L4 is aspherical lens, and object side S7 and image side surface S8 are aspherical.

7th lens L7 is the meniscus lens with negative power, and object side S13 is concave surface, and image side surface S14 is convex surface. In addition, the 7th lens L7 is aspherical lens, object side S13 and image side surface S14 are aspherical.

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 S3-S8, S13, S14.The following table 6 gives embodiment 2 The whole group focal length value F of optical lens, optical lens optics total length TTL (that is, from the object side S1 of the first lens L1 Distance on the heart to the axis of imaging surface S19), the maximum field of view angle FOV of optical lens, corresponding to optical lens maximum field of view angle Image height H corresponding to the maximum clear aperture D of the object side S1 of one lens L1, optical lens maximum field of view angle, optical lens Optic back focal BFL (that is, from the center to the axis of imaging surface S19 of the image side surface S14 of the 7th lens L7 of the last one lens away from From), the material of the radius of curvature R 1 of object side S1 of the first lens L1 and the radius of curvature R 2 of image side surface S2 and the 6th lens L6 The variable quantity dn/dt (6) that material refractive index varies with temperature.

Table 4

Face number	Radius of curvature R	Thickness T	Refractive index Nd	Abbe number Vd
					1	31.4675	2.0000	1.77	49.60
2	15.2305	2.0000
					3	17.2993	4.0950	1.81	41.00
4	9.4501	7.6757
					5	-12.2838	15.1939	1.81	41.00
6	-18.5977	0.1000
					7	13.3180	8.5785	1.59	61.20
8	130.8135	1.5667
					STO	It is infinite	4.4271
10	32.2032	0.9000	1.74	27.80
					11	8.0510	12.3169	1.50	81.00
12	-12.2400	0.3000
					13	-41.4540	7.6628	1.68	31.20
14	-76.4649	0.2333
					15	It is infinite	0.5500	1.52	64.20
16	It is infinite	5.0000
					17	It is infinite	0.4000	1.52	64.20
18	It is infinite	1.0049
					IMA	It is infinite

Table 5

Face number

K

A

B

C

D

E

3

0.0000

4.5637E-05

-5.3894E-07

-3.9292E-09

2.9326E-11

0.0000E+00

4

0.0000

6.5937E-05

-1.1402E-06

-6.5819E-08

6.8755E-10

-3.8328E-12

5

-3.0155

-1.5243E-04

1.5529E-07

-3.8981E-09

-3.0423E-11

6.7368E-13

6

-3.3595

-3.2723E-05

-2.4398E-08

1.5051E-09

-1.1864E-11

2.6285E-14

7

-3.4406

1.9818E-04

-7.0166E-07

1.1835E-08

-6.7480E-11

5.1140E-13

8

-17.2207

2.7840E-05

2.1600E-06

-4.5053E-08

1.2703E-09

-9.8841E-12

13

-130.6973

-4.7846E-04

5.4291E-06

-1.3153E-07

1.6176E-09

-4.3410E-12

14

18.4224

-2.4287E-04

-5.9417E-07

1.7639E-08

-1.0939E-10

4.8588E-13

Table 6

F(mm)	10.750	R1(mm)	31.467
				TTL(mm)	74.270	R2(mm)	15.230
FOV(°)	70	dn/dt(6)	-2.02E-05
				D(mm)	28.080
H(mm)	13.098
				BFL(mm)	7.450

In the present embodiment, meet F/ between the optics total length TTL of optical lens and the whole group focal length value F of optical lens TTL=0.145；Meet BFL/TTL=between the optic back focal BFL of optical lens and the optics total length TTL of optical lens 0.100；The object side of first lens L1 corresponding to the maximum field of view angle FOV of optical lens, optical lens maximum field of view angle Meet D/H/FOV=0.031 between image height H corresponding to the maximum clear aperture D of S1 and optical lens maximum field of view angle；With And first lens L1 the radius of curvature R 1 of object side S1 and the radius of curvature R 2 of image side surface S2 between meet R1/R2=2.066.

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 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 meniscus lens with positive light coke, and object side S7 is convex surface, and image side surface S8 is concave surface.

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

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

In addition, the second lens L2 to the 7th lens L7 is aspherical lens, their object side and image side surface are non- Spherical 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 and E of face lens surface S3-S8, S10-S14.The following table 9 gives embodiment 3 The whole group focal length value F of optical lens, optical lens optics total length TTL (that is, from the object side S1 of the first lens L1 Distance on the heart to the axis of imaging surface S19), the maximum field of view angle FOV of optical lens, corresponding to optical lens maximum field of view angle Image height H corresponding to the maximum clear aperture D of the object side S1 of one lens L1, optical lens maximum field of view angle, optical lens Optic back focal BFL (that is, from the center to the axis of imaging surface S19 of the image side surface S14 of the 7th lens L7 of the last one lens away from From), the material of the radius of curvature R 1 of object side S1 of the first lens L1 and the radius of curvature R 2 of image side surface S2 and the 6th lens L6 The variable quantity dn/dt (6) that material refractive index varies with temperature.

Table 7

Table 8

Face number

K

A

B

C

D

E

3

-2.7030

-2.9125E-05

-6.6705E-07

2.1330E-09

2.0396E-11

-6.4838E-14

4

-0.7044

-1.0515E-06

-1.7002E-06

-8.0603E-09

-3.5649E-11

1.6045E-12

5

-2.1885

-7.0518E-05

2.9493E-08

-7.0410E-09

-8.1227E-11

3.0613E-13

6

-2.1946

-6.6891E-06

-3.9562E-07

2.8579E-09

-1.5544E-11

3.6565E-14

7

0.3168

8.7183E-05

-2.5047E-07

1.1004E-08

-1.3350E-10

1.6528E-12

8

483.5672

1.2568E-05

1.5386E-06

-9.4686E-09

5.5654E-11

2.1429E-12

10

-100.0000

-8.2482E-05

-1.5542E-06

-3.2128E-08

-1.1799E-11

1.7630E-12

11

-0.3779

1.6508E-04

-1.3845E-06

-7.8529E-08

1.0336E-09

-2.1591E-12

12

0.1320

1.0521E-05

-1.5746E-07

-5.6647E-09

1.1432E-10

-2.8113E-13

13

257.8129

-1.4352E-04

-5.8389E-07

3.9824E-09

-1.9438E-10

4.0319E-12

14

-100.0847

-2.4631E-04

6.2655E-08

4.2264E-09

-3.0552E-11

2.2220E-13

Table 9

F(mm)	10.770	R1(mm)	33.409
				TTL(mm)	74.860	R2(mm)	20.000
FOV(°)	70	dn/dt(6)	-2.02E-05
				D(mm)	29.300
H(mm)	12.732
				BFL(mm)	9.047

In the present embodiment, meet F/ between the optics total length TTL of optical lens and the whole group focal length value F of optical lens TTL=0.144；Meet BFL/TTL=between the optic back focal BFL of optical lens and the optics total length TTL of optical lens 0.121；The object side of first lens L1 corresponding to the maximum field of view angle FOV of optical lens, optical lens maximum field of view angle Meet D/H/FOV=0.033 between image height H corresponding to the maximum clear aperture D of S1 and optical lens maximum field of view angle；With And first lens L1 the radius of curvature R 1 of object side S1 and the radius of curvature R 2 of image side surface S2 between meet R1/R2=1.670.

To sum up, embodiment 1 to embodiment 3 meets relationship shown in following table 10 respectively.

Table 10

Conditional/embodiment	1	2	3
				F/TTL	0.137	0.145	0.144
BFL/TTL	0.097	0.100	0.121
				D/H/FOV	0.030	0.031	0.033
R1/R2	1.525	2.066	1.670

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 object side is convex surface, 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

7th lens have positive light coke or negative angular,

Wherein, the 5th lens and the 6th lens glue are combined into balsaming lens.

2. optical lens according to claim 1, which is characterized in that the object side of the 4th lens and image side surface are Convex surface.

3. optical lens according to claim 1, which is characterized in that the 4th lens are meniscus lens, object side For convex surface, image side surface is concave surface.

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

5. optical lens according to claim 1, which is characterized in that the 5th lens are the bent moon with negative power Lens, object side are convex surface, and image side surface is concave surface.

6. optical lens according to claim 1, which is characterized in that the 6th lens have positive light coke, object side Face and image side surface are convex surface.

7. optical lens according to claim 1, which is characterized in that the 7th lens are meniscus lens.

8. optical lens described in any one of -7 according to claim 1, which is characterized in that first lens to the described 7th Any one or more of lens are glass lens.

9. optical lens described in any one of -7 according to claim 1, which is characterized in that first lens to the described 7th Any one or more of lens are glass lens.

10. optical lens described in any one of -7 according to claim 1, which is characterized in that second lens to described One or more of seven lens are aspherical lens.

11. optical lens described in any one of -7 according to claim 1, which is characterized in that second lens to described One or more of seven lens are spheric glass.

12. optical lens described in any one of -7 according to claim 1, which is characterized in that meet conditional: D/H/FOV≤ 0.045,

Wherein, FOV is the maximum field of view angle of the optical lens；

D is the maximum clear aperture of the first lens object side corresponding to the maximum field of view angle of the optical lens；And

H is image height corresponding to the maximum field of view angle of the optical lens.

13. 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 and whole group focal length value F of the optical lens Between meet: 0.08≤F/TTL≤0.2.

14. optical lens described in any one of -7 according to claim 1, which is characterized in that meet conditional: BFL/TTL >= 0.08,

Wherein, BFL be the 7th lens image side surface center to the optical lens imaging surface on the optical axis Distance；And

TTL is the center of the object side of first lens to distance of the imaging surface on the optical axis of the optical lens.

15. optical lens described in any one of -7 according to claim 1, which is characterized in that the object side of first lens Radius of curvature R 1 and image side surface radius of curvature R 2 between meet: R1/R2≤2.3.

16. optical lens described in any one of -7 according to claim 1, which is characterized in that the material of the 6th lens is rolled over The change rate that the rate of penetrating varies with temperature meets conditional: dn/dt (6)≤- 5 × 10^-6/℃。

It by object side to image side sequentially include: the first lens, the second lens, the third lens, the 4th along optical axis 17. optical lens Lens, the 5th lens, the 6th lens and the 7th lens,

It is characterized in that,

First lens, second lens and the 5th lens all have negative power；

The third lens, the 4th lens and the 6th lens all have positive light coke；

7th lens have positive light coke or negative power；And

5th lens and the 6th lens glue are combined into balsaming lens,

Wherein, meet between the radius of curvature R 1 of the object side of first lens and the radius of curvature R 2 of image side surface: R1/R2≤ 2.3。