CN109001887A - Optical lens - Google Patents

Abstract

This application discloses a kind of optical lens, which sequentially includes: the first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens by object side to image side along optical axis.Wherein, the first lens have negative power, and image side surface is concave surface；Second lens and the third lens gluing form the first balsaming lens；4th lens and the 5th lens glue are combined into the second balsaming lens；And the 6th lens have positive light coke, object side and image side surface are convex surface.

Description

Optical lens

Technical field

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

Background technique

Currently, on-vehicle lens are widely used in vehicle-mounted DAS (Driver Assistant System), assisting driver to drive, or even to Automatic Pilot.The universalness used with on-vehicle lens proposes its image definition, picture comfort level etc. higher Requirement.

Existing routine techniques usually obtains higher resolving power to increase lens numbers to six or more.But Increasing lens numbers will affect the miniaturization of camera lens, be unfavorable for installing and using for camera lens, while also will increase the cost of camera lens.Separately Outside, non-spherical lens is generallyd use in routine techniques and carry out aberration correction, when using plastic aspheric lens, since plastics have Biggish thermal expansion coefficient, and there are temperature changes to cause image planes fuzzy problem out of focus；When using glass aspheric lenses, again Meeting is so that the cost of camera lens is excessively high.

Accordingly, it is desirable to provide a kind of temperature stability for being applicable to vehicle-mounted installation can good, relative illumination height, color difference It is small, resolving power is high, while meet miniaturization and low cost optical lens.

Summary of the invention

Technical solution provided by the present application at least has been partially solved techniques discussed above problem.

According to the one aspect of the application, such a optical lens is provided, the optical lens is along optical axis by object side It sequentially include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens to image side.Wherein, First lens have negative power, and image side surface is concave surface；Second lens and the third lens gluing form the first balsaming lens；The Four lens and the 5th lens glue are combined into the second balsaming lens；And the 6th lens have positive light coke, object side and image side Face is convex surface.

In one embodiment, the object side of the first lens is convex surface.

In one embodiment, the object side of the first lens is concave surface.

In one embodiment, the second lens in the first balsaming lens have negative power, and object side is convex surface, Image side surface is concave surface；And the first the third lens in balsaming lens have positive light coke, object side and image side surface are convex Face.

In one embodiment, the second lens in the first balsaming lens have positive light coke, object side and image side Face is convex surface；And the first the third lens in balsaming lens have negative power, object side is concave surface.Optionally, The image side surface of three lens can be convex surface；Alternatively, the image side surface of the third lens can also be concave surface.

In one embodiment, the 4th lens in the second balsaming lens have negative power, object side and image side Face is concave surface；And the second the 5th lens in balsaming lens have positive light coke, object side and image side surface are convex surface.

In one embodiment, the 6th lens are non-spherical lens.

In one embodiment, the focal length f23 of the first balsaming lens and total focal length f of optical lens can meet 1≤ f23/f≤2.1。

In one embodiment, the focal length f45 of the second balsaming lens and total focal length f of optical lens can meet -7≤ f45/f≤-1。

In one embodiment, distance on the center of the image side surface of the 6th lens to the axis of the imaging surface of optical lens Distance TTL can meet BFL/TTL >=0.3 on the center of the object side of BFL and the first lens to the axis of the imaging surface of optical lens.

In one embodiment, distance on the center of the object side of the first lens to the axis of the imaging surface of optical lens The total focal length f of TTL and optical lens can meet TTL/f≤10.More specifically, the center of the object side of the first lens is to optical frames The total focal length f of distance TTL and optical lens can meet TTL/f≤6.5 on the axis of the imaging surface of head.

According to further aspect of the application, additionally provide such a optical lens, the optical lens along optical axis by Object side to image side sequentially includes: the first lens, the first balsaming lens being made of the second lens and the third lens gluing, by the 4th The second balsaming lens and the 6th lens that lens and the 5th lens glue are combined into.Wherein, the focal length f23 of the first balsaming lens with Total focal length f can meet 1≤f23/f≤2.1；The focal length f45 and total focal length f of second balsaming lens can meet -7≤f45/f≤- 1.

In one embodiment, the first lens have negative power, and object side is convex surface, and image side surface is concave surface.

In one embodiment, the first lens have negative power, and object side and image side surface are concave surface.

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

In one embodiment, the second lens in the first balsaming lens have negative power, and object side is convex surface, Image side surface is concave surface；And the first the third lens in balsaming lens have positive light coke, object side and image side surface are convex Face.

In one embodiment, the second lens in the first balsaming lens have positive light coke, object side and image side Face is convex surface；And the first the third lens in balsaming lens have negative power, object side is concave surface.Optionally, The image side surface of three lens can be convex surface；Alternatively, the image side surface of the third lens can also be concave surface.

In one embodiment, the 4th lens in the second balsaming lens have negative power, object side and image side Face is concave surface；And the second the 5th lens in balsaming lens have positive light coke, object side and image side surface are convex surface.

In one embodiment, the 6th lens are non-spherical lens.

In one embodiment, distance on the center of the image side surface of the 6th lens to the axis of the imaging surface of optical lens Distance TTL can meet BFL/TTL >=0.3 on the center of the object side of BFL and the first lens to the axis of the imaging surface of optical lens.

In one embodiment, distance on the center of the object side of the first lens to the axis of the imaging surface of optical lens The total focal length f of TTL and optical lens can meet TTL/f≤10.More specifically, the center of the object side of the first lens is to optical frames The total focal length f of distance TTL and optical lens can meet TTL/f≤6.5 on the axis of the imaging surface of head.

Spheric glass lens can be mostly used in the optical lens, are avoided using aspherical lens, so that it may meet high-resolution The requirement of power, and meet the more stable requirement of low cost, temperature performance simultaneously.Do not consider that cost or temperature performance requirement are lower In the case where, aspherical lens can also be mostly used, so that lens optical performance is more preferably.Meanwhile the use of two groups of balsaming lens, no Only be conducive to aberration correction, realize high-resolution, compact optical overall structure, meet small form factor requirements, also help drop Low lens unit is because of tolerance sensitivities problems such as the inclination generated during group is vertical and/or core shifts.

The application uses multi-disc (for example, six) eyeglass, passes through the focal power of each eyeglass of reasonable distribution optical lens, face Type, and system is made during reducing temperature influences optical lens performance to the reasonable distribution of each eyeglass spacing distance With it is following at least one the utility model has the advantages that

Promote the illumination of camera lens；

Improve the resolution ratio of light microscopic head；

Realize the miniaturization of camera lens；

The susceptibility of reduced optical system, it is vertical convenient for group；

Reduce camera lens cost；

Correct all kinds of aberrations；And

Improve the resolution and image quality of camera lens.

Detailed description of the invention

In conjunction with attached drawing, by the detailed description of following non-limiting embodiment, other features of the invention, 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；

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.

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 In bright book use when indicate exist stated feature, entirety, step, operations, elements, and/or components, but do not exclude the presence of or It is attached with one or more of the other feature, entirety, step, operation, component, assembly unit and/or their combination.In addition, ought be such as When the statement of at least one of " ... " appears in after the list of listed feature, entire listed feature is modified, rather than is modified Individual component in list.In addition, when describing presently filed embodiment, use " can with " indicate " one of the application or Multiple embodiments ".Also, term " illustrative " 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 may include such as six lens with focal power, i.e., the One lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens.This six lens are along optical axis from object Side to image side sequential.

According to presently filed embodiment, the first lens can have negative power, and image side surface is concave surface.First lens can It is excessive with the diverging for being effectively prevented from object space light with negative power, low-refraction, to be conducive to rear lens bore Control.First lens can Abbe number with higher, in favor of reduce optical system overall color difference.In some embodiments In, the object side of the first lens can be convex surface.When the object side of the first lens is convex surface, be conducive to light as much as possible It collects and enters optical system；Simultaneously, it is contemplated that on-vehicle lens outdoor mounted and the environment used may be more severe, thoroughly by first The object side of mirror is configured to convex surface, also helps the landing of the water droplet on object side, to reduce due to bad weathers such as sleet Influence to lens imaging quality.In other embodiments, the object side of the first lens can be concave surface.When the first lens When object side is concave surface, be conducive to the expansion of optical lens field of view angle and the reduction of camera lens front end bore, to be conducive to mirror The reduction of head overall volume；Meanwhile the object side arrangement of the first lens can also moderately be increased into distortion for concave surface, so that camera lens The use of emphasis amplifying observation front small range situation picture is needed suitable for automobile data recorder etc..

Second lens can have positive light coke or negative power, and object side can be convex surface.Due to the image side of the first lens Face is concave surface, is that convex surface advantageously reduces the distance between the first lens and the second lens by the object side arrangement of the second lens, So as to shorten the total physical length of optical lens, the miniaturization of camera lens is realized.The convex surface of second lens object side is arranged, is also helped Reduce the Optical Incidence that periphery is incident to the second lens object side, to reduce energy damage of the light in lens surface reflection It loses, to be conducive to the promotion of camera lens illumination.In addition, since two opposite concaves are easy to produce crossed reflex light, Generated crossed reflex light, which enters imaging surface, can interfere imaging picture effect, therefore the image side surface of the first lens is concave surface, and The object side of second lens is that convex surface can also reduce stray light caused by crossed reflex between the first lens and the second lens.

Second lens and the third lens gluing form the first balsaming lens.Wherein, the second lens and the third lens can be with Various configurations mode carries out gluing.For example, the second lens can be to be convex to the meniscus lens of object side with negative power, and with second The third lens of lens gluing can be the biconvex lens with positive light coke.In another example the second lens can be for positive light coke Biconvex lens, and can be the meniscus lens that is convex to negative power image side with the third lens of the second lens gluing；Or Second lens can be the biconvex lens with positive light coke, and can be for negative light focus with the third lens of the second lens gluing The biconcave lens of degree.By the second lens and the third lens gluing form the first balsaming lens focal length f23 and optical lens it is total 1≤f23/f≤2.1 can be met between focal length f, more specifically, f23 and f can further meet 1.33≤f23/f≤1.71.

4th lens and the 5th lens glue are combined into the second balsaming lens.4th lens can have negative power, object side Face and image side surface can be concave surface.5th lens can have positive light coke, and object side and image side surface can be convex surface.By the 4th Lens and the 5th lens glue, which are combined between the focal length f45 of the second balsaming lens and the total focal length f of optical lens, can meet -7≤ F45/f≤- 1, more specifically, f45 and f can further meet -6.38≤f45/f≤- 3.38.

First balsaming lens and the second balsaming lens include a piece of lens with positive light coke and it is a piece of have negative light The lens of focal power.Wherein, a piece of lens have high index and low Abbe number, and another lens have compared with low-refraction (phase For the lens of high refractive index) and high Abbe number (lens relative to low Abbe number), the high low-refraction of lens be collocated with Conducive to the fast transition of front light, be conducive to increase diaphragm bore, so that camera lens be made to meet night vision requirement.Balsaming lens makes With can also be while effectively reducing system color difference, so that the overall structure of optical system is more compact.

The whole chromatic aberration correction of system has been shared in the use of two groups of balsaming lens, while two groups of balsaming lens are located at The two sides of diaphragm, can effectively aberration correction, shorten system optics total length, promote the resolving power of camera lens.In addition, two groups of glue The use for closing lens, also helping reduces lens unit because the tolerances such as the inclination generated during group is vertical and/or core shift are sensitive Degree problem.

Optionally, in order to improve the optical property of camera lens, any piece lens of first lens into the 5th lens can be adopted With non-spherical lens, or use at least one side for the lens of aspherical mirror.Especially between the second lens and the third lens Aspherical mirror can be used in cemented surface between cemented surface and/or the 4th lens and the 5th lens, further to promote camera lens Energy.When can be of less demanding to camera lens temperature stability, in order to reduce cost and system overall weight, plastic material can also be used Aspherical lens.

6th lens can have positive light coke, and object side and image side surface are convex surface.6th lens can be used aspherical Lens assemble light effectively smoothly at the 6th lens.Optionally, the 6th lens can be the saturating of plastic material Mirror, to mitigate system overall weight and cost.

(when camera lens includes six-element lens, last a piece of lens are the 6th saturating to the last a piece of lens of optical lens Mirror) image side surface center to the axis of the imaging surface of optical lens on distance BFL and optical lens optics total length TTL (that is, From distance on the center to the axis of the imaging surface of optical lens of the object side of the first lens) between can meet BFL/TTL >=0.3, More specifically, can further meet 0.35≤BFL/TTL≤0.49 between BFL and TTL.Back focal length, in group, mould group is adjustable immediately Burnt tolerance is big；In the case where overall length is certain, rear burnt longer, the length of camera lens itself is shorter, and cost is also lower.

The optics total length TTL of optical lens is (that is, from the center of the object side of the first lens to the imaging surface of optical lens Axis on distance) and the total focal length f of optical lens between can meet TTL/f≤10, more specifically, TTL and f can further meet TTL/f≤6.5 further can meet 3.67≤TTL/f≤4.48.

According to mostly using spheric glass lens in the optical lens in the application illustrative embodiments, avoid using non- Spheric glass, so that it may meet the requirement of high resolution, and meet the more stable requirement of low cost, temperature performance simultaneously.It is not examining Consider cost or temperature performance is required aspherical lens can also to be mostly used, so that lens optical performance is more in lower situation It is good.

Multi-disc eyeglass, such as described above six can be used according to the camera lens of the above embodiment of the application.Pass through Spacing etc. on the thickness and axis of each power of lens of reasonable distribution, face type and each lens so that camera lens meet it is stability There is high illumination, small color difference and high resolution while capable of stablizing.In addition, the camera lens configured through the above way also has for example Compact-sized, light-weight shock resistance is good and the performance of athermal, and the camera lens is enabled to conform better to vehicle-mounted requirement.

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 The structural schematic diagram of 1 optical lens.

As shown in Figure 1, optical lens includes from object side to six lens L1-L6 at image side sequential along optical axis. First lens L1 is the biconcave lens with negative power, and object side S1 and image side surface S2 are concave surface；Second lens L2 is Meniscus lens with negative power, object side S3 are convex surface, and image side surface S4 is concave surface；The third lens L3 is with positive light focus The biconvex lens of degree, object side S4 and image side surface S5 are convex surface；4th lens L4 is the biconcave lens with negative power, Its object side S7 and image side surface S8 is concave surface；5th lens L5 be the biconvex lens with positive light coke, object side S8 and Image side surface S9 is convex surface；And the 6th lens L6 be the biconvex lens with positive light coke, object side S10 and image side surface S11 is convex surface.Wherein, the second lens L2 and the third lens L3 gluing form the first balsaming lens.4th lens L4 and the 5th Lens L5 gluing forms the second balsaming lens.It, can also be in such as the third lens L3 and the 4th in the optical lens of the present embodiment Diaphragm STO is provided between lens L4, to improve image quality.Optionally, optical lens further includes with object side S12 and picture The optical filter L7 of side S13 and/or protection glass L8 with object side S14 and image side surface S15.Light from object is sequentially worn It crosses each surface S1 to S15 and is ultimately imaged on imaging surface S16.

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.

Face number	Radius of curvature R	Thickness T	Refractive index Nd	Abbe number Vd
					S1	-19.3754	1.0000	1.55	67.00
S2	3.3061	1.3807
					S3	14.1804	0.6000	1.50	81.00
S4	5.3208	1.8000	1.92	20.88
					S5	-180.0000	0.1540
STO	Infinity	0.2014
					S7	-12.0818	1.5213	1.92	20.88
S8	6.2974	2.1000	1.69	54.57
					S9	-10.7424	0.1000
S10	10.8740	2.6057	1.62	63.41
					S11	-5.6444	0.5132
S12	Infinity	0.5500	1.52	64.20
					S13	Infinity	5.8625
S14	Infinity	0.4000	1.52	64.20
					S15	Infinity	0.1250
S16	Infinity

Table 1

The present embodiment uses six-element lens as an example, passing through the focal length and face type of each lens of reasonable distribution, is protecting While card miniaturization, camera lens is set to meet the requirements such as inexpensive, temperature performance is more stable, and improve the resolving power of camera lens.It is each non- Spherical surface 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 in embodiment 1 each aspherical lens surface S10 and The circular cone coefficient k and high-order coefficient A, B, C, D and E of S11.

Face number

k

A

B

C

D

E

10

-13.7113

1.0151E-03

-9.4019E-05

6.6690E-06

-2.4831E-07

4.0257E-08

11

-2.7582

-1.2074E-03

3.5860E-05

-3.2291E-06

2.4129E-07

-5.8247E-08

Table 2

In the present embodiment, the second lens L2 and the third lens L3 gluing composition the first balsaming lens focal length f23 with The total focal length f of optical lens meets f23/f=1.71；The second balsaming lens of 4th lens L4 and the 5th lens L5 gluing composition Focal length f45 and the total focal length f of optical lens meet f45/f=-5.14；The center of the image side surface S11 of 6th lens L6 is to light The center of the object side S1 of distance BFL and the first lens L1 on the axis of the imaging surface S16 of camera lens is learned to the imaging surface of optical lens Distance TTL meets BFL/TTL=0.39 on the axis of S16；The center of the object side S1 of first lens L1 to optical lens imaging The total focal length f of distance TTL and optical lens meets TTL/f=3.92 on the axis of face S16.

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 includes from object side to six lens L1-L6 at image side sequential along optical axis. First lens L1 is the biconcave lens with negative power, and object side S1 and image side surface S2 are concave surface；Second lens L2 is Biconvex lens with positive light coke, object side S3 and image side surface S4 are convex surface；The third lens L3 is with negative power Meniscus lens, object side S4 be concave surface, image side surface S5 be convex surface；4th lens L4 is that the concave-concave with negative power is saturating Mirror, object side S7 and image side surface S8 are concave surface；5th lens L5 is the biconvex lens with positive light coke, object side S8 It is convex surface with image side surface S9；And the 6th lens L6 be the biconvex lens with positive light coke, object side S10 and image side surface S11 is convex surface.Wherein, the second lens L2 and the third lens L3 gluing form the first balsaming lens.4th lens L4 and the 5th Lens L5 gluing forms the second balsaming lens.It, can also be in such as the third lens L3 and the 4th in the optical lens of the present embodiment Diaphragm STO is provided between lens L4, to improve image quality.Optionally, optical lens further includes with object side S12 and picture The optical filter L7 of side S13 and/or protection glass L8 with object side S14 and image side surface S15.Light from object is sequentially worn It crosses each surface S1 to S15 and is ultimately imaged on imaging surface S16.

Table 4 shows radius of curvature R, thickness T, refractive index Nd and the Abbe of each lens of the optical lens of embodiment 2 Number Vd.Table 5 shows the circular cone coefficient k and high order term system that can be used for each aspherical lens surface S10 and S11 in embodiment 2 Number A, B, C, D and E.Wherein, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.

Face number	Radius of curvature R	Thickness T	Refractive index Nd	Abbe number Vd
					S1	-13.0223	0.9755	1.52	64.21
S2	3.0604	1.2534
					S3	13.7041	1.5716	1.92	20.88
S4	-5.5413	0.6000	1.49	70.42
					S5	-27.0137	0.1502
STO	Infinity	0.0976
					S7	-10.2521	1.2317	1.90	22.00
S8	3.3146	2.0486	1.71	54.57
					S9	-9.8599	0.0976
S10	8.3647	3.1357	1.58	64.00
					S11	-5.5527	0.5006
S12	Infinity	0.5500	1.52	64.21
					S13	Infinity	4.2000
S14	Infinity	0.4000	1.52	64.21
					S15	Infinity	0.3229
S16	Infinity

Table 3

Face number

k

A

B

C

D

E

10

-5.4864

1.4092E-03

1.2235E-04

1.1628E-04

1.7641E-06

-5.4949E-07

11

-2.3282

-1.4233E-03

5.8421E-04

-1.0685E-04

1.1116E-05

-3.7203E-07

Table 4

In the present embodiment, the second lens L2 and the third lens L3 gluing composition the first balsaming lens focal length f23 with The total focal length f of optical lens meets f23/f=1.33；The second balsaming lens of 4th lens L4 and the 5th lens L5 gluing composition Focal length f45 and the total focal length f of optical lens meet f45/f=-3.38；The center of the image side surface S11 of 6th lens L6 is to light The center of the object side S1 of distance BFL and the first lens L1 on the axis of the imaging surface S16 of camera lens is learned to the imaging surface of optical lens Distance TTL meets BFL/TTL=0.35 on the axis of S16；The center of the object side S1 of first lens L1 to optical lens imaging The total focal length f of distance TTL and optical lens meets TTL/f=3.67 on the axis of face S16.

Embodiment 3

The optical lens according to the embodiment of the present application 3 is described referring to Fig. 3.Fig. 3 is shown to be implemented according to the application The structural schematic diagram of the optical lens of example 3.

As shown in figure 3, optical lens includes from object side to six lens L1-L6 at image side sequential along optical axis. First lens L1 is the biconcave lens with negative power, and object side S1 and image side surface S2 are concave surface；Second lens L2 is Biconvex lens with positive light coke, object side S3 and image side surface S4 are convex surface；The third lens L3 is with negative power Biconcave lens, object side S4 and image side surface S5 are concave surface；4th lens L4 is the biconcave lens with negative power, Object side S7 and image side surface S8 is concave surface；5th lens L5 is the biconvex lens with positive light coke, object side S8 and picture Side S9 is convex surface；And the 6th lens L6 be the biconvex lens with positive light coke, object side S10 and image side surface S11 It is convex surface.Wherein, the second lens L2 and the third lens L3 gluing form the first balsaming lens.4th lens L4 and the 5th lens L5 gluing forms the second balsaming lens.It, can also be in such as the third lens L3 and the 4th lens in the optical lens of the present embodiment Diaphragm STO is provided between L4, to improve image quality.Optionally, optical lens further includes with object side S12 and image side surface The optical filter L7 of S13 and/or protection glass L8 with object side S14 and image side surface S15.Light from object sequentially passes through respectively Surface S1 to S15 is simultaneously ultimately imaged on imaging surface S16.

Table 5 shows radius of curvature R, thickness T, refractive index Nd and the Abbe of each lens of the optical lens of embodiment 3 Number Vd.Table 6 shows the circular cone coefficient k and high order term system that can be used for each aspherical lens surface S10 and S11 in embodiment 3 Number A, B, C, D and E.Wherein, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.

Face number	Radius of curvature R	Thickness T	Refractive index Nd	Abbe number Vd
					S1	-19.5734	1.0000	1.60	641.00
S2	3.4991	1.2576
					S3	9.8633	2.0000	1.92	20.88
S4	-12.2190	0.6401	1.49	70.42
					S5	21.8607	0.4134
STO	Infinity	0.2134
					S7	-11.3190	1.4243	1.92	20.88
S8	6.1053	2.5000	1.69	54.57
					S9	-9.1042	0.1067
S10	9.5682	3.2005	1.55	63.41
					S11	-6.3464	0.5475
S12	Infinity	0.5500	1.52	64.20
					S13	Infinity	10.7021
S14	Infinity	0.4000	1.52	64.21
					S15	Infinity	0.1250
S16	Infinity

Table 5

Face number

k

A

B

C

D

E

10

-15.2664

1.4329E-03

4.2254E-05

-1.8332E-05

2.7297E-06

-1.2439E-07

11

-10.2536

-1.0122E-03

1.6036E-05

-2.1647E-05

2.1144E-06

-6.6152E-07

Table 6

In the present embodiment, the second lens L2 and the third lens L3 gluing composition the first balsaming lens focal length f23 with The total focal length f of optical lens meets f23/f=1.63；The second balsaming lens of 4th lens L4 and the 5th lens L5 gluing composition Focal length f45 and the total focal length f of optical lens meet f45/f=-5.98；The center of the image side surface S11 of 6th lens L6 is to light The center of the object side S1 of distance BFL and the first lens L1 on the axis of the imaging surface S16 of camera lens is learned to the imaging surface of optical lens Distance TTL meets BFL/TTL=0.49 on the axis of S16；The center of the object side S1 of first lens L1 to optical lens imaging The total focal length f of distance TTL and optical lens meets TTL/f=4.48 on the axis of face S16.

Embodiment 4

The optical lens according to the embodiment of the present application 4 is described referring to Fig. 4.Fig. 4 is shown to be implemented according to the application The structural schematic diagram of the optical lens of example 4.

As shown in figure 4, optical lens includes from object side to six lens L1-L6 at image side sequential along optical axis. 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 For the biconvex lens with positive light coke, object side S3 and image side surface S4 are convex surface；The third lens L3 is with negative light focus The biconcave lens of degree, object side S4 and image side surface S5 are concave surface；4th lens L4 is the biconcave lens with negative power, Its object side S7 and image side surface S8 is concave surface；5th lens L5 be the biconvex lens with positive light coke, object side S8 and Image side surface S9 is convex surface；And the 6th lens L6 be the biconvex lens with positive light coke, object side S10 and image side surface S11 is convex surface.Wherein, the second lens L2 and the third lens L3 gluing form the first balsaming lens.4th lens L4 and the 5th Lens L5 gluing forms the second balsaming lens.It, can also be in such as the third lens L3 and the 4th in the optical lens of the present embodiment Diaphragm STO is provided between lens L4, to improve image quality.Optionally, optical lens further includes with object side S12 and picture The optical filter L7 of side S13 and/or protection glass L8 with object side S14 and image side surface S15.Light from object is sequentially worn It crosses each surface S1 to S15 and is ultimately imaged on imaging surface S16.

Table 7 shows radius of curvature R, thickness T, refractive index Nd and the Abbe of each lens of the optical lens of embodiment 4 Number Vd.Table 8 shows the circular cone coefficient k and high order term system that can be used for each aspherical lens surface S10 and S11 in embodiment 4 Number A, B, C, D and E.Wherein, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.

Table 7

Face number

k

A

B

C

D

E

10

-23.8061

5.0872E-04

-8.3036E-05

-1.4208E-05

2.1059E-06

-1.8328E-07

11

-11.8265

-1.8058E-03

2.7233E-04

-2.5745E-05

3.4192E-06

-2.2393E-07

Table 8

In the present embodiment, the second lens L2 and the third lens L3 gluing composition the first balsaming lens focal length f23 with The total focal length f of optical lens meets f23/f=1.64；The second balsaming lens of 4th lens L4 and the 5th lens L5 gluing composition Focal length f45 and the total focal length f of optical lens meet f45/f=-6.38；The center of the image side surface S11 of 6th lens L6 is to light The center of the object side S1 of distance BFL and the first lens L1 on the axis of the imaging surface S16 of camera lens is learned to the imaging surface of optical lens Distance TTL meets BFL/TTL=0.39 on the axis of S16；The center of the object side S1 of first lens L1 to optical lens imaging The total focal length f of distance TTL and optical lens meets TTL/f=4.23 on the axis of face S16.

To sum up, embodiment 1 to embodiment 4 meets relationship shown in following table 9 respectively.

Conditional embodiment	1	2	3	4
					f23/f	1.71	1.33	1.63	1.64
f45/f	-5.14	-3.38	-5.98	-6.38
					BFL/TTL	0.39	0.35	0.49	0.39
TTL/f	3.92	3.67	4.48	4.23

Table 9

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 forms.

Claims (16)

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 image side surface is concave surface；

Second lens and the third lens gluing form the first balsaming lens；

4th lens and the 5th lens glue are combined into the second balsaming lens；And

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

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

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

4. optical lens according to any one of claim 1 to 3, which is characterized in that in first balsaming lens The object side of second lens is convex surface.

5. optical lens according to claim 4, which is characterized in that

Second lens in first balsaming lens have negative power, and image side surface is concave surface；And

The third lens in first balsaming lens have positive light coke, and object side and image side surface are convex surface.

6. optical lens according to claim 4, which is characterized in that

Second lens in first balsaming lens have positive light coke, and image side surface is convex surface；And

The third lens in first balsaming lens have negative power, and object side is concave surface.

7. optical lens according to claim 6, which is characterized in that the image side surface of the third lens is convex surface.

8. optical lens according to claim 6, which is characterized in that the image side surface of the third lens is concave surface.

9. optical lens according to claim 2 or 3, which is characterized in that

The 4th lens in second balsaming lens have negative power, and object side and image side surface are concave surface；With And

The 5th lens in second balsaming lens have positive light coke, and object side and image side surface are convex surface.

10. optical lens according to any one of claim 1 to 9, which is characterized in that the 6th lens are aspherical Lens.

11. optical lens according to any one of claim 1 to 9, which is characterized in that the coke of first balsaming lens Total focal length f away from f23 and the optical lens meets 1≤f23/f≤2.1.

12. optical lens according to any one of claim 1 to 9, which is characterized in that the coke of second balsaming lens Total focal length f away from f45 and the optical lens meets -7≤f45/f≤- 1.

13. optical lens according to any one of claim 1 to 9, which is characterized in that the image side surface of the 6th lens Center to the axis of the imaging surface of the optical lens on distance BFL and first lens object side center to the light It learns distance TTL on the axis of the imaging surface of camera lens and meets BFL/TTL >=0.3.

14. optical lens according to any one of claim 1 to 9, which is characterized in that the object side of first lens Center to the axis of the imaging surface of the optical lens on distance TTL and the optical lens total focal length f meet TTL/f≤ 10。

15. optical lens according to claim 14, which is characterized in that the center of the object side of first lens to institute It states the total focal length f of distance TTL and the optical lens on the axis of the imaging surface of optical lens and meets TTL/f≤6.5.

16. optical lens has total focal length f, which is characterized in that the optical lens is sequentially wrapped along optical axis by object side to image side It includes: the first lens, the first balsaming lens being made of the second lens and the third lens gluing, by the 4th lens and the 5th lens glue The second balsaming lens and the 6th lens being combined into,

The focal length f23 of the first balsaming lens and total focal length f meets 1≤f23/f≤2.1；

The focal length f45 of the second balsaming lens and total focal length f meets -7≤f45/f≤- 1.