CN204556940U - A kind of optical lens assembly - Google Patents

Abstract

This application discloses a kind of optical lens assembly, comprised successively along optical axis by the direction of thing side to image side: first lens with positive light coke, there are the second lens of positive light coke, 3rd lens of negative power, optical filter and imaging surface, described optical lens assembly meets relational expression: 0.8<TTL/F<1.8,-2.5<F3/F<-4.3, 0.8<F2/F1<2.6, the application is by arranging the position relationship between rational argument structure and eyeglass, the optics total length of described optical lens assembly is made to be less than 2.2mm, meet the microminiaturized requirement of modern photography equipment.

Description

A kind of optical lens assembly

Technical field

The application relates to imaging device technical field, more particularly, relates to a kind of optical lens assembly.

Background technology

In recent years, along with the integrated level of the continuous progress of science and technology, digital electric equipment is more and more higher, the photographic equipment such as mobile phone, digital camera becomes smaller and more exquisite, frivolous, portable, optical lens is as optical module requisite in photographic equipment, its size becomes one of key factor of the overall dimension affecting photographic equipment, usually the overall length of control both optical camera lens is as much as possible needed when designing camera lens, to ensure the overall dimension of photographic equipment; Becoming stronger day by day along with photographic equipment functions such as mobile phones simultaneously, while maintenance photographic equipment compact, the quality requirements of people to the image that photographic equipment is shot is more and more higher, and this just needs the design of optical lens can be reasonably combined with the imaging apparatus of high pixel in the market.And existing miniaturization phtographic lens, for reducing manufacturing cost, it is main for adopting two-piece type lens arrangement more, be not enough to well revise balance difference, but configuring too much eyeglass will cause camera lens total length to be difficult to reach small form factor requirements, also manufacturing cost can be increased, therefore the lens system of three eyeglass compositions is adopted to can be used as the preferred version of design, the parameter how reasonably arranging three eyeglasses, with the microminiaturized requirement enabling described optical module meet photographic equipment, becomes one of those skilled in the art's technical matters urgently to be resolved hurrily.

Utility model content

In view of this, the application provides a kind of parameter by reasonably arranging three eyeglasses to provide a kind of, the optical lens assembly that the microminiaturization for meeting photographic equipment requires.

To achieve these goals, the existing scheme proposed is as follows:

A kind of optical lens assembly, is comprised along optical axis successively by the direction of thing side to image side:

There is the diaphragm of same central shaft, the first lens, the second lens, the 3rd lens, optical filter and imaging surface;

Wherein, described first lens have positive focal power, and its face, image side is concave surface, and described second lens also have positive focal power, and its thing side is concave surface, and the 3rd lens have negative focal power,

This optical lens assembly meets following relational expression: 0.8<TTL/F<1.8 ,-2.5<F3/F<-4.3,0.8<F2/F1<2.6;

Wherein F is total focal length of described optical lens assembly, and F1 is the focal length of described first lens, and F2 is the focal length of described second lens, and F3 is the focal length of described 3rd lens, and TTL is the overall length of described optical lens assembly.

Preferably, described optical lens assembly also meets relational expression:

0.2<R1/R2<0.6、0.8<R3/R4<1.6、4<T12/T23<11；

Described R1 is the radius-of-curvature of the first lens thing side surface, R2 is the radius-of-curvature on the first surface, lens image side, R3 is the radius-of-curvature of the second lens thing side surface, R4 is the radius-of-curvature on the second surface, lens image side, T12 is the distance between described first lens and the second lens, and T23 is the distance between described second lens and the 3rd lens.

Preferably, in described optical lens assembly, the surface of described 3rd lens thing side is provided with the point of inflexion for converging from axle field rays.

Preferably, described optical lens assembly also meets relational expression:

v1>50，v2>50；

Described v1 is the abbe number of described first lens, and v2 is the abbe number of described second lens.

Preferably, described optical lens assembly also meets relational expression:

n1>1.5，n3>1.5；

N1 is the refractive index of described first lens, and n3 is the refractive index of described 3rd lens.

A kind of optical lens assembly, is comprised along optical axis successively by the direction of thing side to image side:

There is the diaphragm of same central shaft, the first lens, the second lens, the 3rd lens, optical filter and imaging surface;

Wherein, described first lens have positive focal power, and its face, image side is concave surface, and described second lens also have positive focal power, and its thing side is concave surface, and the 3rd lens have negative focal power,

This optical lens assembly meets following relational expression: 0.8<TTL/F<1.8 ,-2.1<F3/F<-4.3,0.8<F2/F1<2.6;

Wherein F is total focal length of described optical lens assembly, and F1 is the focal length of described first lens, and F2 is the focal length of described second lens, and F3 is the focal length of described 3rd lens, and TTL is the overall length of described optical lens assembly.

Preferably, described optical lens assembly also meets relational expression:

0.2<R1/R2<0.6、0.8<R3/R4<1.6、4<T12/T23<11；

Described R1 is the radius-of-curvature of the first lens thing side surface, R2 is the radius-of-curvature on the first surface, lens image side, R3 is the radius-of-curvature of the second lens thing side surface, R4 is the radius-of-curvature on the second surface, lens image side, T12 is the distance between described first lens and the second lens, and T23 is the distance between described second lens and the 3rd lens.

Preferably, described optical lens assembly also meets relational expression:

v1>50，v2>50；

Described v1 is the abbe number of described first lens, and v2 is the abbe number of described second lens.

Preferably, described optical lens assembly also meets relational expression:

n1>1.5，n3>1.5；

N1 is the refractive index of described first lens, and n3 is the refractive index of described 3rd lens.

Preferably, in described optical lens assembly, the described first to the 3rd lens are the aspherical lens adopting molding resin material.

As can be seen from above-mentioned technical scheme, the concrete size of optical lens assembly disclosed in the present application meets constraint condition: 0.8<TTL/F<1.8 ,-2.5<F3/F<-4.3,0.8<F2/F1<2.6; Therefore by arranging the position relationship between rational argument structure and eyeglass, making the optics total length of described optical lens assembly be less than 2.2mm, meeting the microminiaturized requirement of modern photography equipment.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.

The structural representation of the optical lens assembly that Fig. 1 provides for the embodiment of the present application one;

The curvature of field of the optical lens assembly that Fig. 2 provides for the embodiment of the present application one and distortion figure;

The spherical aberration figure of the optical lens assembly that Fig. 3 provides for the embodiment of the present application one;

The structural representation of the optical lens assembly that Fig. 4 provides for the embodiment of the present application two;

The curvature of field of the optical lens assembly that Fig. 5 provides for the embodiment of the present application two and distortion figure;

The spherical aberration figure of the optical lens assembly that Fig. 6 provides for the embodiment of the present application two;

The structural representation of the optical lens assembly that Fig. 7 provides for the embodiment of the present application three;

The curvature of field of the optical lens assembly that Fig. 8 provides for the embodiment of the present application three and distortion figure;

The spherical aberration figure of the optical lens assembly that Fig. 9 provides for the embodiment of the present application three.

Embodiment

This application discloses the optical lens that a kind of size adopting three aspherical lens to combine is less.

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

The structural representation of Fig. 1 optical lens assembly disclosed in the embodiment of the present application one.

See Fig. 1, optical lens assembly disclosed in the present application, is being disposed with along optical axis by thing side to the direction of image side:

There is diaphragm 1, first lens 2, second lens 3 of same central shaft, the 3rd lens 4, optical filter 5 and imaging surface 6;

Wherein, described first lens 2 have positive focal power, and its face, image side is concave surface, and described second lens 3 also have positive focal power, and its thing side is concave surface, and the 3rd lens 4 have negative focal power,

This optical lens assembly meets following relational expression:

0.8<TTL/F<1.8、-2.5<F3/F<-4.3、0.8<F2/F1<2.6；

Wherein, described F is total focal length of optical lens assembly, and F1 is the focal length of described first lens 2, and F2 is the focal length of described second lens 3, and F3 is the focal length of described 3rd lens 4, and TTL is the overall length of described optical lens assembly.

Visible see optical lens assembly disclosed in the above embodiments of the present application, optical lens assembly disclosed in the above embodiments of the present application meet relational expression: 0.8<TTL/F<1.8 ,-2.5<F3/F<-4.3,0.8<F2/F1<2.6; Therefore by arranging the position relationship between rational argument structure and eyeglass, the optics total length of described optical lens assembly is made to be less than 2.2mm, what those skilled in the art can know is, described optical length is less than the optical lens assembly of 2.2mm, meets the microminiaturized requirement of modern photography equipment.

Certainly, be understandable that, in order to ensure the performance of described optical lens assembly further, described optical lens assembly also needs satisfied following relational expression:

0.2<R1/R2<0.6、0.8<R3/R4<1.6、4<T12/T23<11；

Wherein, described R1 is the radius-of-curvature of the first lens 2 thing side surface, R2 is the radius-of-curvature on the first surface, lens 2 image side, R3 is the radius-of-curvature of the second lens 3 thing side surface, R4 is the radius-of-curvature on the second surface, lens 3 image side, T12 is the distance between described first lens 2 and the second lens 3, and T23 is the distance between described second lens 3 and the 3rd lens 3.

Be understandable that, the first lens 2, second lens 3 in the above-mentioned any embodiment of the application, other parameter of the 3rd lens 4 can carry out reasonable set according to the specific requirement of design, preferably, disclosed in the above embodiments of the present application, the parameter of the described first to the 3rd lens can also comprise:

v1>50，v2>50；

Described v1 is the abbe number of described first lens 2, and v2 is the abbe number of described second lens 3.

It is appreciated of course that the imaging effect in order to ensure described optical lens assembly further, the application also limits the refractive index of described first lens and the 3rd lens, comprising:

n1>1.5，n3>1.5；

Described n1 is the refractive index of described first lens 2, and n3 is the refractive index of described 3rd lens 4.

Be understandable that, in prior art, usual employing glass mould lens make described optical lens assembly, but there is the problem that the product yield caused because of processing difficulties is low and cost is higher in glass mirror, be directed to this problem, disclosed in the above-mentioned any embodiment of the application, the first lens 2, second lens 3, the 3rd lens 4 are the aspherical lens adopting the comparatively ripe resin material of moulding process to make.

Be understandable that, in order to improve the image quality of described optical lens assembly, the application also by described 3rd lens 4 appropriate design, has carried out further correction to the aberration from axle visual field.Be specially:

The surface of described 3rd lens 4 thing side is provided with the point of inflexion for converging from axle field rays, the described point of inflexion can effectively converge from axle field rays, the angle that light is preset to the angle on photo-sensitive cell and chip matches, thus reaches the object of the aberration of further modified off-axis visual field.

Any aspheric curve of the described first to the 3rd lens in the above-mentioned any embodiment of the application all meets formula:

$z=\frac{{\mathrm{cr}}^2}{1+\sqrt{1-(1+k)c^2{r}^2}}+{\mathrm{\&alpha;}}_1{r}^2+{\mathrm{\&alpha;}}_2{r}^4+{\mathrm{\&alpha;}}_3{r}^6+{\mathrm{\&alpha;}}_4{r}^8+{\mathrm{\&alpha;}}_5{r}^{10}+{\mathrm{\&alpha;}}_6{r}^{12}+{\mathrm{\&alpha;}}_7{r}^{14}+{\mathrm{\&alpha;}}_8{r}^{16}$

Wherein, described z represents the Z coordinate figure of lens surface each point, and r represents the Y-axis coordinate figure of each point on lens surface, and c is the inverse of the radius of curvature R of lens surface, and k is circular cone coefficient, α ₁, α ₂, α ₃, α ₄, α ₅, α ₆, α ₇, α ₈for order aspherical coefficients.

Be understandable that, certainly on the basis meeting above-mentioned condition, the design parameter of the described first to the 3rd aspheric curve can be determined according to the demand of design, such as, when this optical lens assembly designs taking pictures digital product for current high pixel, the feature of ultra-thin large aperture wide-angle can be made it have.Its optics overall length is set to be less than 2.2mm, meets the requirement of digital product microminiaturization.Its aperture is set to 2.0, the design of described 2.0 super large apertures, the take pictures ability of clapping at night of digital product of high pixel is significantly strengthened, in the environment of dark, guarantees certain image quality; Its field angle can be set to be not less than 78 degree, and the wide-angle of more than 78 degree design, can absorb light-sensitive surface imaging by more scenery, increases high pixel and to take pictures the field range of digital product shooting.Conveniently understand, the application also fully discloses three kinds described first design parameters to the aspheric curve of the 3rd lens, shown in following embodiment one, embodiment two and embodiment three:

Embodiment one:

In this example, total focal length of described optical lens assembly is 1.64mm, and aperture is 2.0, field angle reaches 79 degree, the thickness of described optical filter 5 is 0.15mm, see Fig. 1, the cover glass sheet 7 of described optical lens assembly is arranged between optical filter 5 and described imaging surface 6 along object space to image space, the thickness of described cover glass sheet is for being 0.4mm, the center thickness scope of described first lens 2 is between 0.296 ~ 0.415mm, the center thickness scope of described second lens 3 is between 0.216 ~ 0.315mm, the center thickness scope of described 3rd lens 4 is between 0.205 ~ 0.356mm, simultaneously, the design parameter of the aspheric curve of the described first to the 3rd lens is as shown in table 1, its structural drawing as shown in Figure 1, the curvature of field and distortion figure are as shown in Figure 2, spherical aberration figure is as shown in Figure 3:

First lens

Second lens

3rd lens

Face sequence number

11

12

21

32

31

32

R

7.17E-01

1.92E+00

-7.60E-01

-5.46E-01

9.65E-01

5.79E-01

k

-2.19E-02

1.84E+01

1.31E+00

-2.05E-01

-3.01E-02

-4.11E+00

α 2

9.60E-02

1.34E-01

1.08E+00

7.03E-02

-3.00E+00

-1.38E+00

α 3

2.97E+00

-1.85E+00

-1.65E+01

-3.94E-01

4.54E+00

2.55E+00

α 4

-2.43E+01

4.78E+01

5.21E+01

-2.91E-01

1.80E+00

-2.91E+00

α 5

5.81E+01

-3.25E+02

4.12E+02

2.45E+01

-1.42E+01

1.53E+00

α 6

5.46E+02

4.07E+02

-1.91E+03

1.73E+02

8.66E+00

6.29E-02

α 7

-1.52E+03

6.16E+03

3.51E+03

2.27E+02

9.37E+00

-5.46E-01

α 8

-3.60E+03

-2.22E+04

-2.19E+03

-1.40E+03

-8.50E+00

1.39E-01

Table 1

Wherein, described sequence number 11 represents that the thing side surface, 12 of the first lens represents that the surface, image side, 21 of the first lens represents that the thing side surface, 22 of the second lens represents that the surface, image side, 31 of the second lens represents that the thing side surface, 32 of the 3rd lens represents the surface, image side of the 3rd lens.

Embodiment two:

In this example, total focal length of described optical lens assembly is 1.63mm, and aperture is 2.0, field angle reaches 78 degree, the thickness of described optical filter 5 is 0.21mm, see Fig. 1, the cover glass sheet 7 of described optical lens assembly is arranged between optical filter 5 and described imaging surface 6 along object space to image space, the thickness of described cover glass sheet is for being 0.335mm, the center thickness of described first lens 2 is between 0.275 ~ 0.335mm, the center thickness of described second lens 3 is between 0.206 ~ 0.325mm, the center thickness of described 3rd lens 4 is between 0.275 ~ 0.356mm, now, the design parameter of the aspheric curve of the described first to the 3rd lens is as shown in table 2, its structural drawing as shown in Figure 4, the curvature of field and distortion figure are as shown in Figure 5, spherical aberration figure is as shown in Figure 6:

Eyeglass 1

Eyeglass 2

Eyeglass 3

Face sequence number

11

12

21

22

31

32

R

7.35E-01

2.03E+00

-7.79E-01

-6.02E-01

1.23E+00

7.66E-01

k

1.19E+00

3.39E+00

1.65E+00

-2.95E-01

-3.57E+00

-7.65E-01

α 2

8.82E-02

2.07E-01

9.23E-01

-9.16E-01

-2.63E+00

-2.17E+00

α 3

-1.46E+01

-6.03E-01

-1.39E+01

2.19E+00

4.95E+00

4.07E+00

α 4

2.44E+02

4.66E+01

3.62E+00

-1.16E+01

1.22E+00

-6.25E+00

α 5

-2.16E+03

-3.60E+02

6.17E+02

2.71E+01

-1.49E+01

7.03E+00

α 6

8.21E+03

-4.03E+02

-1.61E+03

2.56E+02

8.76E+00

-6.07E+00

α 7

-3.66E+03

1.82E+04

1.63E+03

8.53E+02

1.19E+01

3.57E+00

α 8

-3.87E+04

-5.91E+04

-2.03E+03

-3.74E+03

-9.92E+00

-1.10E+00

Table 2

Embodiment three:

In this example, total focal length of described optical lens assembly is 1.64mm, and aperture is 2.0, field angle reaches 80 degree, the thickness of described optical filter 5 is 0.21mm, see Fig. 1, the cover glass sheet 7 of described optical lens assembly is arranged between optical filter 5 and described imaging surface 6 along object space to image space, the thickness of described cover glass sheet is for being 0.335mm, the center thickness of described first lens 2 is between 0.265 ~ 0.355mm, the center thickness of described second lens 3 is between 0.256 ~ 0.395mm, the center thickness of described 3rd lens 4 is between 0.285 ~ 0.386mm, now, the design parameter of the aspheric curve of the described first to the 3rd lens is as shown in table 3, its structural drawing as shown in Figure 7, the curvature of field and distortion figure are as shown in Figure 8, spherical aberration figure is as shown in Figure 9:

Eyeglass 1

Eyeglass 2

Eyeglass 3

Face sequence number

11

12

21

22

31

32

R

7.39E-01

2.08E+00

-7.78E-01

-5.89E-01

1.29E+00

7.65E-01

k

1.18E+00

3.13E+00

1.36E+00

-3.36E-01

-4.41E+00

-7.85E-01

α 2

7.44E-02

1.98E-01

8.32E-01

-8.46E-01

-2.56E+00

-2.18E+00

α 3

-1.42E+01

-2.58E-01

-1.32E+01

2.37E+00

5.01E+00

4.11E+00

α 4

2.44E+02

4.62E+01

2.97E+00

-1.12E+01

5.30E-01

-6.24E+00

α 5

-2.16E+03

-3.58E+02

6.17E+02

2.84E+01

-1.41E+01

6.88E+00

α 6

8.22E+03

-3.75E+02

-1.59E+03

2.58E+02

8.76E+00

-6.00E+00

α 7

-3.48E+03

1.83E+04

1.56E+03

8.54E+02

1.19E+01

3.73E+00

α 8

-3.84E+04

-5.84E+04

-4.12E+03

-3.79E+03

-9.92E+00

-1.23E+00

Table 3

The distortion of optical lens assembly disclosed in the above embodiments of the present application is less than 1%, the curvature of field is less than 0.1mm, spherical aberration is less than 10um, imaging distortion is little, sharpness is high, color is full, stereovision is abundant to be understandable that, disclosed herein as well is a kind of optical lens assembly, compared to optical lens assembly described disclosed in the above embodiments of the present application, in optical module disclosed in the present embodiment, the span of described F3/F is :-2.1<F3/F<-4.3.And the other technologies feature in the present embodiment can be used for reference mutually with the technical characteristic of the optical lens assembly in above-mentioned any embodiment, then this states without the need to tired.

Be understandable that, be directed to optical lens assembly disclosed in the above embodiments of the present application, the application is also with the embody rule opening a kind of optical lens assembly, concrete, disclosed herein as well is a kind of photographic equipment applying described optical lens assembly, described photographic equipment can comprise optical lens assembly disclosed in the above-mentioned any embodiment of the application.Wherein, described photographic equipment such as can be specially above mobile phone, notebook and iPad at the electronic equipment that can carry out video or image acquisition.

Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.

In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.

To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (10)

1. an optical lens assembly, is characterized in that, is comprised successively along optical axis by the direction of thing side to image side:

There is the diaphragm of same central shaft, the first lens, the second lens, the 3rd lens, optical filter and imaging surface;

Wherein, described first lens have positive focal power, and its face, image side is concave surface, and described second lens also have positive focal power, and its thing side is concave surface, and the 3rd lens have negative focal power,

This optical lens assembly meets following relational expression: 0.8<TTL/F<1.8 ,-2.5<F3/F<-4.3,0.8<F2/F1<2.6;

Wherein F is total focal length of described optical lens assembly, and F1 is the focal length of described first lens, and F2 is the focal length of described second lens, and F3 is the focal length of described 3rd lens, and TTL is the overall length of described optical lens assembly.

2. optical lens assembly according to claim 1, is characterized in that, described optical lens assembly also meets relational expression:

0.2<R1/R2<0.6、0.8<R3/R4<1.6、4<T12/T23<11；

Described R1 is the radius-of-curvature of the first lens thing side surface, R2 is the radius-of-curvature on the first surface, lens image side, R3 is the radius-of-curvature of the second lens thing side surface, R4 is the radius-of-curvature on the second surface, lens image side, T12 is the distance between described first lens and the second lens, and T23 is the distance between described second lens and the 3rd lens.

3. optical lens assembly according to claim 1, is characterized in that, the surface of described 3rd lens thing side is provided with the point of inflexion for converging from axle field rays.

4. optical lens assembly according to claim 1 and 2, is characterized in that, described optical lens assembly also meets relational expression:

v1>50，v2>50；

Described v1 is the abbe number of described first lens, and v2 is the abbe number of described second lens.

5. optical lens assembly according to claim 1 and 2, is characterized in that, described optical lens assembly also meets relational expression:

n1>1.5，n3>1.5；

N1 is the refractive index of described first lens, and n3 is the refractive index of described 3rd lens.

6. an optical lens assembly, is characterized in that, is comprised successively along optical axis by the direction of thing side to image side:

There is the diaphragm of same central shaft, the first lens, the second lens, the 3rd lens, optical filter and imaging surface;

Wherein, described first lens have positive focal power, and its face, image side is concave surface, and described second lens also have positive focal power, and its thing side is concave surface, and the 3rd lens have negative focal power,

This optical lens assembly meets following relational expression: 0.8<TTL/F<1.8 ,-2.1<F3/F<-4.3,0.8<F2/F1<2.6;

Wherein F is total focal length of described optical lens assembly, and F1 is the focal length of described first lens, and F2 is the focal length of described second lens, and F3 is the focal length of described 3rd lens, and TTL is the overall length of described optical lens assembly.

7. optical lens assembly according to claim 6, is characterized in that, described optical lens assembly also meets relational expression:

0.2<R1/R2<0.6、0.8<R3/R4<1.6、4<T12/T23<11；

Described R1 is the radius-of-curvature of the first lens thing side surface, R2 is the radius-of-curvature on the first surface, lens image side, R3 is the radius-of-curvature of the second lens thing side surface, R4 is the radius-of-curvature on the second surface, lens image side, T12 is the distance between described first lens and the second lens, and T23 is the distance between described second lens and the 3rd lens.

8. the optical lens assembly according to claim 6 or 7, is characterized in that, described optical lens assembly also meets relational expression:

v1>50，v2>50；

Described v1 is the abbe number of described first lens, and v2 is the abbe number of described second lens.

9. the optical lens assembly according to claim 6 or 7, is characterized in that, described optical lens assembly also meets relational expression:

n1>1.5，n3>1.5；

N1 is the refractive index of described first lens, and n3 is the refractive index of described 3rd lens.

10. optical lens assembly according to claim 6, is characterized in that, the described first to the 3rd lens are the aspherical lens adopting molding resin material.