CN109581620A

CN109581620A - Optical lens

Info

Publication number: CN109581620A
Application number: CN201710905493.7A
Authority: CN
Inventors: 王东方; 姚波; 谢前森
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2019-04-05
Anticipated expiration: 2037-09-29
Also published as: CN109581620B

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 and the 6th lens.Wherein, the first lens can have negative power, and object side is convex surface, and image side surface is concave surface；Second lens and the third lens can have positive light coke, and object side and image side surface can be convex surface；4th lens can have positive light coke；5th lens can have negative power；And the 6th lens can have a positive light coke, object side can be concave surface, and image side surface can be convex surface.

Description

Optical lens

Technical field

This application involves a kind of optical lens, more specifically, this application involves a kind of optical lens including six-element lens.

Background technique

With the development of science and technology, the pixel request to on-vehicle lens is higher and higher, the size of chip also increases therewith, causes The size of entire optical lens also increases with it.This will be unfavorable for the miniaturization of camera lens, while can cause the rising of manufacturing cost.

However, application conditional for certain installation sites, needs just to can satisfy installation using small size camera lens and want It asks.Such as need to be mounted on the on-vehicle lens of windshield, due to having risk of interferences to windshield and being installed The limitation of position, needs that front end is small-bore, requirement of small size using special lens design to meet.

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 and the 6th lens.Wherein, first thoroughly Mirror can have negative power, and object side is convex surface, and image side surface is concave surface；Second lens and the third lens can have positive light focus Degree, object side and image side surface can be convex surface；4th lens can have positive light coke；5th lens can have negative power； And the 6th lens can have a positive light coke, object side can be concave surface, and image side surface can be convex surface.

Further aspect of the application provides such a optical lens, and the optical lens is along optical axis by object side to picture Side sequentially includes: the first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens.Wherein, first thoroughly Mirror can have negative power, and object side is convex surface, and image side surface is concave surface；Second lens, the third lens and the 4th lens With positive light coke；5th lens can have negative power；6th lens can have positive light coke, and object side can be concave surface, Image side surface can be convex surface, wherein can meet between the object flank radius R31 and image side surface radius of curvature R 32 of the third lens: |R31/R32|≥2。

In one embodiment, the object side of the 4th lens 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 one embodiment, the third lens can be glass spheric glass.

In one embodiment, at least one of the second lens and the 6th lens can be aspherical lens.

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

In one embodiment, the 4th lens and the glue-bondable composition balsaming lens of the 5th lens.

In one embodiment, optical lens may also include the diaphragm being set between the second lens and the third 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: 2.5≤TTL/F≤5.5.

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 TTL, the maximum field of view angle FOV of optical lens and optical lens maximum field of view angle: TTL/h/FOV≤0.03。

In one 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 the object side of first lens and optical lens maximum field of view angle: D/h/FOV≤0.015。

It in one embodiment, can between the object flank radius R31 and image side surface radius of curvature R 32 of the third lens Meet: | R31/R32 | >=2.

In one embodiment, the second lens can be the focal length value F2 and optics of glass lens and the second lens It can meet between the whole group focal length value F of camera lens: 1.5≤F2/F≤4.5.

In one embodiment, the 6th lens are the focal length value F6 and optical lens of glass lens and the 6th lens Whole group focal length value F between can meet: 3≤F6/F≤6.

The application uses such as six-element lens and is further set the third lens by the shape of optimal setting eyeglass It is calculated as the focal power of each eyeglass of biconvex shape, reasonable distribution and forms the miniaturization, preceding that balsaming lens etc. realizes optical lens The beneficial effect of small-bore, high pixel and big field angle is held, realizes and reduces optical system lens aberration, improves image quality, Match the purpose of large chip.

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 six lens with focal power, i.e., and first Lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens.This six lens along optical axis from object side to Image side sequential.

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 negative power, and object side can be convex surface, and image side surface can be concave surface.First lens can use up Big field rays are possibly collected, and collected light is made to enter rear optical system.In practical applications, it is contemplated that vehicle-mounted First lens can be arranged as convex surface direction in the bad weathers such as sleet by camera lens outdoor mounted use environment, on-vehicle lens The meniscus shape of object side is conducive to the landing of water droplet etc., reduces the influence to lens imaging quality.

Second lens can have positive light coke, and object side and image side surface can be convex surface.Second lens can be by first thoroughly The light that mirror is collected is compressed, and light tendency is made smoothly to transit to rear optical system.

The third lens can have positive light coke, and object side and image side surface can be convex surface.The third lens can assemble light, Make the light of diverging can smoothly enter into rear optical system, while helping to reduce optics overall length.The convex surface of object side is arranged, and can make The spherical aberration for introducing rear optical system reduces, to mitigate the aberration correction pressure of rear eyeglass.

4th lens can have positive light coke.

5th lens can have negative power.

6th lens can have positive light coke, and object side can be concave surface, and image side surface can be convex surface.6th lens are to assemble Lens can make light gently be incident to the chip surface of imaging surface, the relative illumination performance of lifting system.6th lens can increase The rear coke of optical system, meets long reach requirement, when identical FOV is required, Lens is kept not increase, real The expansion in phenomenon face, so that being conducive to the matching of large chip.

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 4th lens and the 5th lens is glued, and By the 4th lens and the 5th lens combination at balsaming lens.It is saturating by introducing the gluing being made of the 4th lens and the 5th lens Mirror can help to eliminate color difference influence, reduce the tolerance sensitivities of system；Meanwhile glued the 4th lens and the 5th lens are also It can be with residual fraction color difference with the whole color difference of balance optical system.The gluing of 4th lens and the 5th lens is omitted the 4th thoroughly Airspace between mirror and the 5th lens meets system compact demand so that optical system overall is compact.Also, the 4th The gluing of lens and the 5th lens can reduce lens unit because the tolerance sensitivities such as inclination/core shift for generating during group is stood are asked Topic.

In the exemplary embodiment, can the light for limiting light beam be set for example between the second lens and the third lens Door screen, to further increase the image quality of camera lens.When diaphragm is set between the second lens and the third lens, can collect through The front and back light crossed is conducive to the front and back lens set bore for reducing camera lens, shortens optical system overall length, realizes small size performance.

In balsaming lens, the 4th lens close to object side have positive light coke, and the 5th lens close to image side have negative Focal power, such be provided with are conducive to transit to the 6th lens again after further assembling front light, are conducive to rear light The reduction of light path reduces rear end bore/size of camera lens, shortens optical system overall length, to realize short TTL, realizes that miniaturization is special Property.

In the exemplary embodiment, the optics total length TTL of optical lens is (that is, from the object side of the first lens The heart to optical lens imaging surface in the distance on optical axis) and the whole group focal length value F of optical lens between can meet 2.5≤TTL/ F≤5.5, more specifically, TTL and F can further meet 3.7≤TTL/F≤4.4.Meet conditional 2.5≤TTL/F≤5.5, The small size performance of camera lens can be achieved.

In the exemplary embodiment, the optics total length TTL of optical lens, optical lens maximum field of view angle FOV with And can meet between image height h corresponding to optical lens maximum field of view angle: TTL/h/FOV≤0.03, more specifically, TTL, h and FOV can further meet TTL/h/FOV≤0.025.Meet conditional TTL/h/FOV≤0.03, it, can under identical imaging surface With shorter optics total length TTL.

In the exemplary embodiment, the maximum field of view angle FOV of optical lens, corresponding to optical lens maximum field of view angle 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≤0.015, more specifically, D, h and FOV can further meet D/h/FOV≤0.009.Meet conditional D/h/ FOV≤0.015, it is ensured that front end is small-bore.

In the exemplary embodiment, the object flank radius R31 Yu its image side surface of the third lens of optical lens are bent It can meet between rate radius R32: | R31/R32 | >=2, more specifically, R31 and R32 can further satisfactions | and R31/R32 | >=3.4. Meet conditional | R31/R32 | >=2, it is ensured that the large aperture of optical lens, small FNO, so that after light as much as possible enters The night vision of square optical system, advantageous optical lens uses.

In the exemplary embodiment, at least one of the second lens and the 6th lens can be arranged as aspherical mirror Piece.The characteristics of aspherical lens, is: being consecutive variations from center of lens to periphery curvature.And have perseverance from center of lens to periphery The spheric glass for determining curvature is different, and aspherical lens have more preferably radius of curvature characteristic, has to improve and distorts aberration and improvement The advantages of astigmatic image error.After aspherical lens, the aberration occurred when imaging can be eliminated as much as possible, to mention Rise the image quality of camera lens.

At least one of second lens, the third lens and the 6th lens in optical lens can be the mirror of plastic material Piece can also be the eyeglass of glass material.Since the eyeglass thermal expansion coefficient of plastic material is larger, the environment used in the camera lens When temperature change is larger, the lens of plastic material can affect greatly the overall performance of camera lens.And use glass material Eyeglass can reduce influence of the temperature to lens performance.It, can will be in the second lens, the third lens and the 6th lens in utilization At least one be arranged as glass lens so that optical lens has good temperature stability, but higher cost.Optionally, Also the second lens, the 6th lens can be arranged as glass lens.Since the eyeglass of plastic material is to the overall performance of optical lens With large effect, therefore, need to carry out reasonable distribution and optimization to the focal length of the lens of plastic material in, to have Reduce conducive to the thermal compensation of system entirety.For example, can meet between the focal length F2 of the second lens and the total focal length F of optical lens 1.5≤F2/F≤4.5 further can meet 2.7≤F2/F≤3.6.The focal length F6 of 6th lens and optical lens it is total Focal length F and between can meet 3≤F6/F≤6, further, 3.6≤F6/F≤5.2 can be met.Pass through the reasonable of focusing Distribution, can be effectively improved the temperature performance of lens system, so that the camera lens guarantees perfect solution in large temperature range in guarantee Shorten camera lens total length while picture as much as possible.

Multi-disc eyeglass, such as described above six can be used according to the optical lens of the above embodiment of the application. By each power of lens of the above-mentioned optical lens of optimal setting, face type, reasonable employment balsaming lens is realized in identical imaging There is shorter optics total length TTL under face, front end bore is small, the application of high pixel and increases field angle, make camera lens have compared with Good image quality, image definition, to reduce the risk of software erroneous judgement, so that the camera lens can conform better to vehicle-mounted mirror The requirement of head.

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 six lens as an example in embodiment, but the optical lens is not limited to include six 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 and the 6th lens L6.

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 biconvex lens with positive light coke, and object side S3 is convex surface, and image side surface S4 is convex surface.The Two lens L2 are using aspherical lens.

The third lens L3 is the biconvex lens with positive light coke, and object side S6 is convex surface, and image side surface S7 is convex surface.

4th lens L4 is the biconvex lens with positive light coke, and object side S8 is convex surface, and image side surface S9 is convex surface.The Five lens L5 are the biconcave lens with negative power, and object side S9 is concave surface, and image side surface S10 is concave surface.Wherein, the 4th thoroughly Mirror L4 and the 5th lens L5 gluing unit are at balsaming lens.

6th lens L6 is the meniscus lens with positive light coke, and object side S11 is concave surface, and image side surface S12 is convex surface. 6th lens L6 is using aspherical lens.

Optionally, which may also include optical filter L7 and/or protection with object side S13 and image side surface S14 Lens L7 '.Optical filter L7 can be used for correcting color error ratio.Protection lens L7 ' can be used for that the image positioned at imaging surface IMA is protected to pass Sense chip.Light from object sequentially passes through each surface S1 to S14 and is ultimately imaged on imaging surface IMA.

In the optical lens of the present embodiment, diaphragm STO can be set between the second lens L2 and the third lens L3 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	25.0000	0.8424	1.80	46.57
2	2.7130	2.0783
					3	14.9105	1.6847	1.62	23.53
4	-19.3740	1.1785
					STO	It is infinite	-0.0282
6	14.4743	1.4444	1.52	64.21
					7	-4.1362	0.0936
8	7.1054	2.0747	1.72	46.00
					9	-5.0226	0.5616	1.85	23.78
10	6.4316	0.7002
					11	-105.7496	1.4763	1.53	56.07
12	-9.2061	0.9347
					13	It is infinite	0.8892	1.52	64.21
14	It is infinite	4.0989
					IMA	It is infinite

The present embodiment uses six-element 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 while guaranteeing big imaging size and high pixel, Realize the effect for reducing optics total length and expanding field angle.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 S3, S4 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 number

K

A

B

C

D

E

3

-13.2717

-6.3116E-04

8.2868E-05

3.8797E-05

-6.0684E-06

8.4059E-06

4

-78.5845

-1.6259E-03

6.3287E-04

3.8748E-07

-1.1323E-05

2.1456E-06

11

2956.3270

-4.2407E-03

-3.8601E-04

6.4627E-06

-4.8466E-06

4.4030E-07

12

-85.5569

-1.0411E-02

2.1450E-03

-3.5833E-04

3.2468E-05

-1.1665E-06

The following table 3 gives the optics total length TTL of the optical lens of embodiment 1 (that is, from the object side S1 of the first lens L1 Center to the axis of imaging surface S15 on distance), the whole group focal length value F of optical lens, corresponding to optical lens maximum field of view angle Image height h, optical lens corresponding to the maximum clear aperture D of the object side S1 of first lens L1, optical lens maximum field of view angle Maximum field of view angle FOV, the second lens of optical lens the 6th lens of focal length value F2 and optical lens focal length value F6.

Table 3

Parameter	TTL(mm)	F(mm)	D(mm)	h(mm)
					Numerical value	18.029	4.819	6.013	8.082
Parameter	FOV(°)	F2(mm)	F6(mm)
					Numerical value	92	13.850	18.762

In the present embodiment, meet between the optics total length TTL of optical lens and the whole group focal length value F of optical lens TTL/F=3.741；The optics total length TTL of optical lens, the maximum field of view angle FOV of optical lens and optical lens are most Meet TTL/h/FOV=0.024 between image height h corresponding to big field angle；Maximum field of view angle FOV, the optics of optical lens The maximum clear aperture D of the object side S1 of first lens L1 corresponding to camera lens maximum field of view angle and optical lens maximum field of view Meet D/h/FOV=0.008 between image height h corresponding to angle；The focal length value F2 and optical lens of the second lens of optical lens L2 Whole group focal length value F between meet F2/F=2.874；The focal length value F6 of the 6th lens L6 of optical lens and between optical lens Meet F6/F=3.893 between whole group focal length value F；And optical lens the third lens L3 object side radius of curvature R 31 and its Meet between the radius of curvature R 32 of image side surface | R31/R32 |=3.499.

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 and the 6th lens L6.

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, S4, S11 and S12.The following table 6 gives embodiment 2 optical lens optics total length TTL (that is, from the center to the axis of imaging surface S15 of the object side S1 of the first lens L1 away from From), the whole group focal length value F of optical lens, the first lens L1 corresponding to optical lens maximum field of view angle object side S1 most Maximum field of view angle FOV, the optical lens of image height h corresponding to big clear aperture D, optical lens maximum field of view angle, optical lens The focal length value F6 of the 6th lens of focal length value F2 and optical lens of second lens.

Table 4

Face number	Radius of curvature R	Thickness T	Refractive index Nd	Abbe number Vd
					1	30.0000	0.8038	1.80	46.57
2	2.5720	2.0720
					3	15.1005	1.6076	1.64	23.53
4	-17.5071	1.1569
					STO	It is infinite	-0.0269
6	14.3447	1.6076	1.49	64.21
					7	-3.9383	0.0893
8	6.7609	1.9831	1.74	44.90
					9	-4.6232	0.6000	1.88	21.00
10	6.2866	0.6512
					11	-228.1363	1.4087	1.53	56.07
12	-8.6830	0.8919
					13	It is infinite	0.7500	1.52	64.21
14	It is infinite	4.6261
					IMA	It is infinite

Table 5

Face number

K

A

B

C

D

E

3

0.7694

-4.2167E-04

2.2145E-04

7.0628E-05

-7.9875E-06

1.2849E-06

4

-98.4073

-1.5884E-03

8.8540E-04

1.3101E-05

-1.4859E-05

3.8036E-06

11

735.5719

-5.0369E-03

-4.8770E-04

1.3934E-05

-5.5397E-06

5.3376E-06

12

-84.1817

-1.2385E-02

2.6957E-03

-4.9612E-04

4.9745E-05

-1.9262E-06

Table 6

Parameter	TTL(mm)	F(mm)	D(mm)	h(mm)
					Numerical value	18.221	4.641	8.960	9.588
Parameter	FOV(°)	F2(mm)	F6(mm)
					Numerical value	112	12.922	16.816

In the present embodiment, meet between the optics total length TTL of optical lens and the whole group focal length value F of optical lens TTL/F=3.926；The optics total length TTL of optical lens, the maximum field of view angle FOV of optical lens and optical lens are most Meet TTL/h/FOV=0.017 between image height h corresponding to big field angle；Maximum field of view angle FOV, the optics of optical lens The maximum clear aperture D of the object side S1 of first lens L1 corresponding to camera lens maximum field of view angle and optical lens maximum field of view Meet D/h/FOV=0.008 between image height h corresponding to angle；The focal length value F2 and optical lens of the second lens of optical lens L2 Whole group focal length value F between meet F2/F=2.784；The focal length value F6 of the 6th lens L6 of optical lens and between optical lens Meet F6/F=3.630 between whole group focal length value F；And optical lens the third lens L3 object side radius of curvature R 31 and its Meet between the radius of curvature R 32 of image side surface | R31/R32 |=3.642.

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 and the 6th lens L6.

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, S4, S11 and S12.The following table 9 gives embodiment 3 optical lens optics total length TTL (that is, from the center to the axis of imaging surface S15 of the object side S1 of the first lens L1 away from From), the whole group focal length value F of optical lens, the first lens L1 corresponding to optical lens maximum field of view angle object side S1 most Maximum field of view angle FOV, the optical lens of image height h corresponding to big clear aperture D, optical lens maximum field of view angle, optical lens The focal length value F6 of the 6th lens of focal length value F2 and optical lens of second lens.

Table 7

Face number	Radius of curvature R	Thickness T	Refractive index Nd	Abbe number Vd
					1	35.0000	0.8641	1.80	46.57
2	2.7951	2.1920
					3	16.2001	1.7283	1.64	23.53
4	-18.8811	1.2437
					STO	It is infinite	-0.0289
6	15.3905	1.7283	1.53	64.21
					7	-4.2280	0.0960
8	6.2858	2.1401	1.73	44.90
					9	-5.0762	0.5761	1.85	23.78
10	6.7026	0.7385
					11	-124.3720	1.5145	1.53	56.07
12	-9.9029	0.9588
					13	It is infinite	0.9500	1.52	64.21
14	It is infinite	2.3797
					IMA	It is infinite

Table 8

Surf

K

A

B

C

D

E

3

-0.9033

-3.8749E-04

1.3598E-04

4.0775E-05

-4.2585E-06

5.6145E-06

4

-100.0000

-1.2937E-03

6.0607E-04

5.9945E-06

-7.9627E-06

1.7035E-06

11

120.0000

-4.1035E-03

-3.3047E-04

1.0834E-05

-2.0292E-06

1.4609E-07

12

-100.0000

-9.7066E-03

1.8876E-03

-1.9924E-04

2.5862E-05

-8.7260E-07

Table 9

In the present embodiment, meet between the optics total length TTL of optical lens and the whole group focal length value F of optical lens TTL/F=4.373；The optics total length TTL of optical lens, the maximum field of view angle FOV of optical lens and optical lens are most Meet TTL/h/FOV=0.021 between image height h corresponding to big field angle；Maximum field of view angle FOV, the optics of optical lens The maximum clear aperture D of the object side S1 of first lens L1 corresponding to camera lens maximum field of view angle and optical lens maximum field of view Meet D/h/FOV=0.007 between image height h corresponding to angle；The focal length value F2 and optical lens of the second lens of optical lens L2 Whole group focal length value F between meet F2/F=3.558；The focal length value F6 of the 6th lens L6 of optical lens and between optical lens Meet F6/F=5.129 between whole group focal length value F；And optical lens the third lens L3 object side radius of curvature R 31 and its Meet between the radius of curvature R 32 of image side surface | R31/R32 |=3.640.

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

Table 10

Conditional	1	2	3
				TTL/f	3.741	3.926	4.373
TTL/h/FOV	0.024	0.017	0.021
				D/h/FOV	0.008	0.008	0.007
F2/F	2.874	2.784	3.558
				F6/F	3.893	3.630	5.129
∣R31/R32∣	3.499	3.642	3.640

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 and the 6th 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 and the third lens have positive light coke, and object side and image side surface are convex surface；

4th lens have positive light coke；

5th lens have negative power；And

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

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 object side of the 5th lens and image side surface are Concave surface.

4. optical lens according to claim 1, which is characterized in that the third lens are glass spheric glass.

5. optical lens according to claim 1, which is characterized in that in second lens and the 6th lens extremely One of few is aspherical lens.

6. optical lens according to any one of claims 1-5, which is characterized in that

4th lens and the 5th lens glue are combined into balsaming lens.

7. optical lens according to any one of claims 1-5, which is characterized in that the optical lens further includes setting Diaphragm between second lens and the third lens.

8. optical lens according to any one of claims 1-5, 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 optical lens whole group focal length value F it Between meet: 2.5≤TTL/F≤5.5.

9. optical lens according to any one of claims 1-5, 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 optical lens maximum field of view angle FOV with And meet between image height h corresponding to optical lens maximum field of view angle: TTL/h/FOV≤0.03.

10. optical lens according to any one of claims 1-5, which is characterized in that the maximum view of the optical lens The maximum clear aperture D of the object side of first lens corresponding to rink corner degree FOV, optical lens maximum field of view angle with And meet between image height h corresponding to optical lens maximum field of view angle: D/h/FOV≤0.015.

11. optical lens according to any one of claims 1-5, which is characterized in that the object side of the third lens Meet between radius of curvature R 31 and image side surface radius of curvature R 32: | R31/R32 | >=2.

12. optical lens according to claim 1 or 5, which is characterized in that

Second lens are glass lens, and

Meet between the focal length value F2 of second lens and the whole group focal length value F of the optical lens: 1.5≤F2/F≤4.5.

13. optical lens according to claim 1 or 5, which is characterized in that

6th lens are glass lens, and

Meet between the focal length value F6 of 6th lens and the whole group focal length value F of the optical lens: 3≤F6/F≤6.

14. optical lens, which is characterized in that the optical lens along optical axis by object side to image side sequentially include: the first lens, Second lens, the third lens, the 4th lens, the 5th lens and the 6th lens,

It is characterized in that,

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

5th lens have negative power；

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

Wherein, meet between the object flank radius R31 and image side surface radius of curvature R 32 of the third lens: | R31/R32 | ≥2。