CN109445073A

CN109445073A - Optical imaging system

Info

Publication number: CN109445073A
Application number: CN201811604289.2A
Authority: CN
Inventors: 黄林; 张战飞
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2018-12-26
Filing date: 2018-12-26
Publication date: 2019-03-08
Also published as: WO2020134140A1

Abstract

The present invention provides a kind of optical imaging systems, successively include the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens from object side to image side along optical axis, and the first lens have positive light coke；Second lens have negative power；The object side of 6th lens is concave surface；7th lens have negative power；Wherein, f is the effective focal length of the optical imaging system, and the effective focal length of the 4th lens is f4, and the effective focal length of the 5th lens is f5, | f/f4 |+| f/f5 |≤0.3.The present invention solves the problems, such as that the image quality of optical imaging system in the prior art and Miniaturization Design can not have both.

Description

Optical imaging system

Technical field

This application involves optical fields, in particular to a kind of ultra-thin, seven chip optical imaging systems of long-focus.

Background technique

With the continuous development of science and technology, requirement of the people for optical imaging system is also higher and higher.

Specifically, the image quality of optical imaging system needs further to be promoted in order to meet the use demand of people, Focal length camera module can clearly shoot the scenery of distant place, generate space compression sense, and can protrude main information, virtualization back Scape, thus increasingly have been favored by people, it occupies a tiny space in the market in optical imaging system.

Moreover, with the development of the portable electronic products such as smart phone, market is to the small-sized of optical imaging system Change, higher requirements are also raised for lightweight.In order to meet the design requirement of optical imaging system miniaturization, it is necessary to control light Learn the overall length of eyeglass mould group.It is aspherical to significantly improve image quality, it reduces aberration, reduces number of lenses, be advantageously implemented optics The miniaturization of imaging system；Therefore, aspherical use is to alleviate this excessive contradiction of overall length of focal length and optical mirror slip mould group The important means of point.

To sum up, how to manufacture and design and a kind of have both miniaturization and the optical imaging system of high imaging quality has become optics Field urgent problem to be solved.

Summary of the invention

The main purpose of the present invention is to provide a kind of optical imaging systems, to solve optical imagery system in the prior art The problem of image quality and Miniaturization Design of system can not have both.

To achieve the goals above, according to an aspect of the invention, there is provided a kind of optical imaging system, along optical axis from Object side to image side successively includes the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th Lens, the first lens have positive light coke；Second lens have negative power；The object side of 6th lens is concave surface；7th thoroughly Mirror has negative power；Wherein, f is the effective focal length of the optical imaging system, and the effective focal lengths of the 4th lens is f4, the 5th The effective focal length of lens is f5, | f/f4 |+| f/f5 |≤0.3.

Further, the Entry pupil diameters of optical imaging system are EPD, f/EPD < 2.2.

Further, the effective focal length of the first lens is f1, and the effective focal lengths of the third lens is f3, the 6th lens it is effective Focal length is f6, f1/ | f3 |+f1/ | and f6 | < 0.5.

Further, the effective focal length of the second lens is f2, and the effective focal lengths of the 7th lens is f7,1.4≤f2/f7≤ 2.0。

Further, the radius of curvature of the image side surface of the second lens is R4, and the radius of curvature of the object side of the third lens is R5,1.0 < f/ | R4 |+f/ | R5 | < 3.0.

Further, the radius of curvature of the object side of the 5th lens is R9, and the radius of curvature of the image side surface of the 5th lens is R10,0.8 < R9/R10 < 1.5.

Further, the radius of curvature of the object side of the 6th lens is R11, and the radius of curvature of the image side surface of the 6th lens is R12, -4.0 < f/R11+f/R12 < -2.0.

Further, the radius of curvature of the object side of the 6th lens is R11, and the radius of curvature of the image side surface of the 6th lens is R12,0.8 < R11/R12 < 2.0.

Further, the 4th lens, the center thickness of the 5th lens and the 6th lens on optical axis are respectively CT4, CT5 And CT6,5 < f/ (CT4+CT5+CT6) < 7.

Further, the spacing of the 4th lens and the 5th lens on optical axis is T45, and the 5th lens and the 6th lens are in light Spacing on axis is T56,0.6 < T45/T56 < 1.0.

Further, the spacing of the 6th lens and the 7th lens on optical axis is T67, center of the 7th lens on optical axis With a thickness of CT7,0.9≤T67/CT7≤1.6.

According to an aspect of the invention, there is provided a kind of optical imaging system, is successively wrapped along optical axis from object side to image side Include the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, the first lens tool There is positive light coke；Second lens have negative power；The object side of 6th lens is concave surface；7th lens have negative power； Wherein, 3.5 < f × (ImgH/TTL) < 4.5, f is the effective focal length of optical imaging system, and ImgH is the imaging of optical imaging system The half of effective pixel area diagonal line length on face, TTL are distance of the object side of the first lens to imaging surface on optical axis.

It applies the technical scheme of the present invention, in above-mentioned optical imaging system, passes through first in reasonable control system The object side view of lens, the positive and negative distribution of the second lens and the 7th power of lens and the 6th lens, Lai Youxiao Horizon The low order aberration of weighing apparatus optical imaging system, so that the image quality of the imaging system of optical imaging system is higher.In addition, passing through conjunction Reason the 4th lens of control and the 5th power of lens, control | f/f4 |+| f/f5 | it is less than or equal to 0.3, can be avoided light Deviation when passing through optical imaging system is excessive, while being conducive to the curvature of field of correction optical imaging system.Moreover, pass through optimization The numerical value of the half of effective pixel area diagonal line length in the effective focal length of optical imaging system, the imaging surface of optical imaging system And first lens relationship of the object side to imaging surface between the distance on optical axis, control f × (ImgH/TTL) be greater than 3.5 And less than 4.5, the overall length and image height of optical imaging system can be reasonably controlled, avoids image height too small, is conducive to optical imagery The miniaturization of system.

Detailed description of the invention

The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:

Fig. 1 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 1；

Fig. 2A to Fig. 2 D respectively illustrates chromatic curve on the axis of the optical imaging system of embodiment 1, astigmatism curve, distortion Curve and ratio chromatism, curve；

Fig. 3 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 2；

Fig. 4 A to Fig. 4 D respectively illustrates chromatic curve on the axis of the optical imaging system of embodiment 2, astigmatism curve, distortion Curve and ratio chromatism, curve；

Fig. 5 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 3；

Fig. 6 A to Fig. 6 D respectively illustrates chromatic curve on the axis of the optical imaging system of embodiment 3, astigmatism curve, distortion Curve and ratio chromatism, curve；

Fig. 7 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 4；

Fig. 8 A to Fig. 8 D respectively illustrates chromatic curve on the axis of the optical imaging system of embodiment 4, astigmatism curve, distortion Curve and ratio chromatism, curve；

Fig. 9 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 5；

Figure 10 A to Figure 10 D respectively illustrates chromatic curve on the axis of the optical imaging system of embodiment 5, astigmatism curve, abnormal Varied curve and ratio chromatism, curve；

Figure 11 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 6；

Figure 12 A to Figure 12 D respectively illustrates chromatic curve on the axis of the optical imaging system of embodiment 6, astigmatism curve, abnormal Varied curve and ratio chromatism, curve；

Figure 13 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 7；

Figure 14 A to Figure 14 D respectively illustrates chromatic curve on the axis of the optical imaging system of embodiment 7, astigmatism curve, abnormal Varied curve and ratio chromatism, curve；

Figure 15 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 8；

Figure 16 A to Figure 16 D respectively illustrates chromatic curve on the axis of the optical imaging system of embodiment 8, astigmatism curve, abnormal Varied curve and ratio chromatism, curve；

Figure 17 shows the structural schematic diagrams according to the optical imaging system of the embodiment of the present application 9；

Figure 18 A to Figure 18 D respectively illustrates chromatic curve on the axis of the optical imaging system of embodiment 9, astigmatism curve, abnormal Varied curve and ratio chromatism, curve；

Figure 19 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 10；

Figure 20 A to Figure 20 D respectively illustrate chromatic curve on the axis of the optical imaging system of embodiment 10, astigmatism curve, Distortion curve and ratio chromatism, curve.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.It is right below The description only actually of at least one exemplary embodiment be it is illustrative, never as to the present invention and its application or use Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts Every other embodiment obtained, shall fall within the protection scope of the present invention.

As background technique is introduced, in the prior art, image quality and miniaturization to optical imaging system are proposed Higher requirement, that is to say, that need optical imaging system under the premise of with superior image quality, also to have both structure The small feature of size promotes electronics to be satisfied with the Miniaturization Design demand for being provided with the electronic product of optical imaging system The competitiveness of product in market.Present applicant proposes a kind of optical imaging system, not only image quality with higher, but also have smaller Structure size, be conducive to Miniaturization Design.

In a kind of typical embodiment of the application, a kind of optical imaging system is provided, such as Fig. 1, Fig. 3, Fig. 5, figure 7, shown in Fig. 9, Figure 11, Figure 13, Figure 15, Figure 17 and Figure 19, along optical axis on from object side to the direction of image side, the optical imagery system System successively include the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th lens E6 and 7th lens E7.

Wherein, the first above-mentioned lens have positive light coke；The second above-mentioned lens have negative power；Above-mentioned the 6th The object side of lens is concave surface；The 7th above-mentioned lens have negative power；Conditional f × (ImgH/ of optical imaging system TTL) meet condition: 3.5 < f × (ImgH/TTL) < 4.5, f is the effective focal length of optical imaging system, and ImgH is optical imagery system The half of effective pixel area diagonal line length on the imaging surface of system, TTL be the first lens object side to imaging surface on optical axis Distance.

In above-mentioned optical imaging system, thoroughly by the first lens in reasonable control system, the second lens and the 7th The positive and negative distribution of the focal power of mirror and the object side view of the 6th lens, carry out the low order of effectively balance optical imaging system Aberration, so that the image quality of the imaging system of optical imaging system is higher.In addition, by rationally controlling the 4th lens and the 5th Power of lens, control | f/f4 |+| f/f5 | it is less than or equal to 0.3, can be avoided when light passes through optical imaging system Deviation is excessive, while being conducive to the curvature of field of correction optical imaging system.Moreover, pass through effective coke of optimization optical imaging system The object side of the numerical value and the first lens of the half of effective pixel area diagonal line length on imaging surface away from, optical imaging system To relationship of the imaging surface between the distance on optical axis, control f × (ImgH/TTL) is greater than 3.5 and less than 4.5, can be reasonably The overall length and image height for controlling optical imaging system, avoid image height too small, are conducive to the miniaturization of optical imaging system.

In a kind of embodiment of the application, the Entry pupil diameters of optical imaging system are EPD, f/EPD < 2.2.In this way, protecting While having demonstrate,proved the light passing amount of optical imaging system, imaging effect of the optical imaging system under dark situation is enhanced, simultaneously also Reduce the aberration of the peripheral field of optical imaging system.

In another embodiment of the application, the effective focal length of the first lens is f1, and the effective focal length of the third lens is f3, The effective focal length of 6th lens is f6, f1/ | f3 |+f1/ | and f6 | < 0.5.In this way, passing through the first lens of reasonable distribution, the third lens With the effective focal length of the 6th lens, facilitate the characteristic that light optical imaging system realizes focal length.And make optical imaging system Have the ability for promoting the convergence to light, adjusts light focusing position, control the overall length of optical imaging system.

In another embodiment of the application, the effective focal length of the second lens is f2, and the effective focal length of the 7th lens is f7, 1.4≤f2/f7≤2.0.In this way, the effective focal length by reasonable distribution the second lens and the 7th lens similarly facilitates light Learn the characteristic that imaging system realizes focal length；And optical imaging system is enabled to have the aggregate capabilities promoted to light, adjustment Light focusing position.

In another embodiment of the application, in order to pass through the radius of curvature that the second lens and the third lens are rationally arranged, Optical imaging system is enabled easier to match conventional chip, the curvature of the image side surface of the second above-mentioned lens half for having Diameter is R4, and the radius of curvature of the object side of above-mentioned the third lens is R5,1.0 < f/ | R4 |+f/ | and R5 | < 3.0.

In another embodiment of the application, the radius of curvature of the object side of the 5th lens is R9, the image side of the 5th lens The radius of curvature in face is R10,0.8 < R9/R10 < 1.5.In this way, avoiding the by the radius of curvature for reasonably controlling the 5th lens Five lens are excessively bent, and reduce difficulty of processing, while being conducive to control the curvature of field of optical imaging system.

In another embodiment of the application, the radius of curvature of the object side of the 6th lens is R11, the image side of the 6th lens The radius of curvature in face is R12, -4.0 < f/R11+f/R12 < -2.0.Ensure the effective focal length f and the 6th lens of optical imaging system The sum of ratio of radius of curvature R 12 of the radius of curvature R 11 of object side and the 6th lens image side surface is conducive within the scope of this Control chief ray angle, the CRA of matching chip.

In another embodiment of the application, the radius of curvature of the object side of the 6th lens is R11, the image side of the 6th lens The radius of curvature in face is R12,0.8 < R11/R12 < 2.0.In this way, passing through the radius of curvature for reasonably controlling the 6th lens object side The radius of curvature R 12 of R11 and the 6th lens image side surface, the ability for making optical imaging system have stronger balance astigmatism, simultaneously The ability for making optical imaging system have preferable balance color aberrations and distortion.

In another embodiment of the application, the center of the 4th lens, the 5th lens and the 6th lens on optical axis is thick Degree is respectively CT4, CT5 and CT6,5 < f/ (CT4+CT5+CT6) < 7.In this way, by rationally control the 4th lens, the 5th lens and The center thickness of 6th lens so that it is higher so that the surface of lens is changed freedom degree, and then is conducive to improving optical imaging system Correct the ability of astigmatism and the curvature of field.

In order to reliably reduce the assembling difficulty of optical imaging system, the assembly convenience of improving optical imaging system and make With stability, in another embodiment of the application, the spacing of the 4th lens and the 5th lens on optical axis is T45, and the 5th thoroughly The spacing of mirror and the 6th lens on optical axis is T56,0.6 < T45/T56 < 1.0.In this way, by rationally controlling the 4th lens and the The interval of five lens and the interval of the 5th lens and the 6th lens advantageously reduce to avoid interval too small between lens The assembling difficulty of optical imaging system.

In another embodiment of the application, the spacing of the 6th lens and the 7th lens on optical axis is T67, the 7th lens Center thickness on optical axis is CT7,0.9≤T67/CT7≤1.6.In this way, by reasonably distributing the 6th lens and the 7th thoroughly Airspace between mirror effectively has compressed the size of optical imaging system, guarantees the optical imagery system for being provided with the application The ultra-slim features of the electronic product camera lens of system.

In the illustrated embodiment of the application, such as Fig. 1, Fig. 3, Fig. 5, Fig. 7, Fig. 9, Figure 11, Figure 13, Figure 15, Figure 17 and figure Shown in 19, above-mentioned optical imaging system further includes optical filter E8, optical filter E8 be located at above-mentioned 7th lens E7 away from the 6th The side of lens E6, optical filter E8 can filter out stray light, further promote the image quality of the optical imaging system.

It should be noted that near axis area refers to the region near optical axis.If lens surface is convex surface and not define this convex When the position of face, 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 When position, 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 is known as image side surface near the surface of imaging surface in each lens.

In order to enable those skilled in the art can clearly understand the technical solution and technical effect of the application, It is described in detail below with reference to specific embodiment.

Embodiment 1

As shown in Figure 1, the optical imaging system successively includes diaphragm STO, along optical axis on from object side to the direction of image side One lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th lens E6, the 7th lens E7, filter Mating plate E8 and imaging surface S17.

First lens have positive light coke, and the object side of the first lens is convex surface, and to be aspherical, and image side surface is recessed Face, and be aspherical；Second lens have negative power, and the object side of the second lens is convex surface, and are aspherical, image side surface It for concave surface, and is aspherical；The third lens have positive light coke, and the object side of the third lens is convex surface, and to be aspherical, as Side is concave surface, and is aspherical；4th lens have positive light coke, and the object side of the 4th lens is convex surface, and are aspheric Face, image side surface are concave surface, and are aspherical；5th lens have negative power, and the object side of the 5th lens is concave surface, and is Aspherical, image side surface is convex surface, and is aspherical；6th lens have positive light coke, and the object side of the 6th lens is concave surface, And to be aspherical, image side surface is convex surface, and is aspherical；7th lens have negative power, and the object side of the 7th lens is Concave surface, and to be aspherical, image side surface is concave surface, and is aspherical.

It further include the optical filter with object side S15 and image side surface S16 in the optical imaging system.Light from object according to Sequence passes through each surface S1 to S16 and is ultimately imaged on imaging surface S17.

Table 1 show the surface types of each lens of the optical imaging system of embodiment 1, radius of curvature, thickness, material and Circular cone coefficient, wherein radius of curvature and the unit of thickness are mm.

Table 1

In the present embodiment, the face type x of each non-spherical lens is available but is not limited to following aspherical formula and is defined:

Wherein, x 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 be circular cone coefficient ( It has been provided in table 1)；Ai is the correction factor of aspherical i-th-th rank.

The following table 2 gives the high-order coefficient A for aspherical mirror S1-S14 each in embodiment 1₄、A₆、A₈、A₁₀、A₁₂、 A₁₄、A₁₆And A₂₀。

Table 2

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

2.0175E-02

-1.3266E-02

6.7940E-02

-1.7251E-01

2.6832E-01

-2.5914E-01

1.4990E-01

-4.7547E-02

6.3108E-03

S2

-3.5775E-02

1.8975E-01

-4.1496E-01

6.2707E-01

-7.2523E-01

6.2420E-01

-3.5684E-01

1.1555E-01

-1.5746E-02

S3

-5.5614E-02

2.7905E-01

-6.1452E-01

9.3669E-01

-1.0616E+00

9.0369E-01

-5.2647E-01

1.7872E-01

-2.5959E-02

S4

-4.9931E-02

2.1114E-01

-4.7587E-01

9.9841E-01

-1.7242E+00

2.2798E+00

-1.9469E+00

9.0442E-01

-1.7137E-01

S5

-2.6175E-02

1.7702E-01

-3.8154E-01

9.0696E-01

-1.4400E+00

1.6051E+00

-1.1493E+00

4.5034E-01

-6.9717E-02

S6

-2.6562E-02

7.2670E-02

1.2216E-03

-2.9019E-01

1.3728E+00

-2.9825E+00

3.5716E+00

-2.2339E+00

5.7572E-01

S7

-1.1830E-01

7.2809E-02

-3.6789E-01

1.3416E+00

-3.2224E+00

4.9296E+00

-4.5909E+00

2.3757E+00

-5.2340E-01

S8

-1.0114E-01

5.2517E-02

-3.4586E-01

1.1059E+00

-2.2267E+00

2.7698E+00

-2.0657E+00

8.4766E-01

-1.4675E-01

S9

-8.2288E-02

-2.1313E-01

8.2372E-01

-2.3560E+00

4.2507E+00

-4.8836E+00

3.3867E+00

-1.2889E+00

2.0772E-01

S10

-6.5843E-02

-1.1434E-01

2.7522E-01

-4.6540E-01

5.4583E-01

-4.3437E-01

2.1317E-01

-5.5811E-02

5.8657E-03

S11

-9.0590E-02

-8.2109E-02

2.3034E-02

9.3316E-02

-1.8851E-01

1.9263E-01

-1.1123E-01

3.3351E-02

-3.9745E-03

S12

1.2715E-02

-1.2230E-01

1.4148E-01

-1.2122E-01

7.7337E-02

-3.1723E-02

7.7248E-03

-1.0156E-03

5.5401E-05

S13

-7.7119E-02

2.5760E-02

-3.2528E-03

3.6347E-04

-1.1748E-04

2.4016E-05

-2.1780E-06

7.3402E-08

7.2448E-12

S14

-5.4256E-02

1.7198E-02

-4.0570E-03

7.4371E-04

-1.4423E-04

2.6003E-05

-3.0802E-06

1.9399E-07

-4.8826E-09

In embodiment 1, the effective focal length f1=3.53mm of the first lens, the effective focal length f2=-7.30mm of the second lens, The effective focal length f3=29.91mm of the third lens, the effective focal length f4=37.74mm of the 4th lens, effective coke of the 5th lens Away from f5=-185.16mm, the effective focal length f6=26.05mm of the 6th lens, the effective focal length f7=-4.34mm of the 7th lens. The effective focal length f=5.31mm, TTL=5.45mm, ImgH=4.15mm of the optical imaging system, wherein TTL is the first lens Distance of the center of the object side S1 of E1 to imaging surface S17 on optical axis, ImgH are pair of effective pixel area on imaging surface S17 The long half of linea angulata.It specifically may refer to table 21.

And the optical imaging system meets:

F × (ImgH/TTL)=3.90；F/EPD=2.09；F1/ | f3 |+f1/ | f6 |=0.25；F2/f7=1.68；|f/ F4 |+| f/f5 |=0.17；F/ | R4 |+f/ | R5 |=2.59；R9/R10=0.93；F/R11+f/R12=-2.36；R11/R12 =1.33；F/ (CT4+CT5+CT6)=5.52；T45/T56=0.82；T67/CT7=1.35；It specifically may refer to table 22.

In addition, Fig. 2A shows chromatic curve on the axis of the optical imaging system of embodiment 1, the light of different wave length is indicated Line deviates via the converging focal point after system.Fig. 2 B shows the astigmatism curve of the optical imaging system of embodiment 1, indicates son Noon curvature of the image and sagittal image surface bending.Fig. 2 C shows the distortion curve of the optical imaging system of embodiment 1, indicates different Distortion sizes values in the case of visual angle.Fig. 2 D shows the ratio chromatism, curve of the optical imaging system of embodiment 1, indicates light Line via the different image heights after system on imaging surface deviation.A to Fig. 2 D is it is found that light given by embodiment 1 according to fig. 2 Learning imaging system can be realized good image quality.

Embodiment 2

As shown in figure 3, the optical imaging system successively includes the first lens along optical axis on from object side to the direction of image side E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th lens E6, the 7th lens E7, optical filter E8 With imaging surface S17.

First lens have positive light coke, and the object side of the first lens is convex surface, and to be aspherical, and image side surface is recessed Face, and be aspherical；Second lens have negative power, and the object side of the second lens is convex surface, and are aspherical, image side surface It for concave surface, and is aspherical；The third lens have positive light coke, and the object side of the third lens is convex surface, and to be aspherical, as Side is concave surface, and is aspherical；4th lens have positive light coke, and the object side of the 4th lens is convex surface, and are aspheric Face, image side surface are concave surface, and are aspherical；5th lens have positive light coke, and the object side of the 5th lens is concave surface, and is Aspherical, image side surface is convex surface, and is aspherical；6th lens have negative power, and the object side of the 6th lens is concave surface, And to be aspherical, image side surface is convex surface, and is aspherical；7th lens have negative power, and the object side of the 7th lens is Concave surface, and to be aspherical, image side surface is concave surface, and is aspherical.

Table 3 show the surface types of each lens of the optical imaging system of embodiment 2, radius of curvature, thickness, material and Circular cone coefficient, wherein radius of curvature and the unit of thickness are mm.

Table 3

In the present embodiment, the calculation formula of the face type x of each non-spherical lens is identical as embodiment 1.

The following table 4 gives the high-order coefficient A for aspherical mirror S1-S14 each in embodiment 2₄、A₆、A₈、A₁₀、A₁₂、 A₁₄、A₁₆And A₂₀。

Table 4

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

1.9981E-02

-1.3049E-02

6.4247E-02

-1.5748E-01

2.3501E-01

-2.1705E-01

1.2008E-01

-3.6519E-02

4.6596E-03

S2

-2.9461E-02

1.4228E-01

-2.7068E-01

3.5977E-01

-3.8123E-01

3.1856E-01

-1.8489E-01

6.1984E-02

-8.7877E-03

S3

-4.9260E-02

2.1637E-01

-4.0965E-01

5.5276E-01

-5.5842E-01

4.3458E-01

-2.4170E-01

8.0757E-02

-1.1643E-02

S4

-4.3274E-02

1.5040E-01

-2.6522E-01

5.5414E-01

-9.9015E-01

1.3562E+00

-1.1846E+00

5.5418E-01

-1.0449E-01

S5

-1.6951E-02

9.9301E-02

-8.7505E-02

2.2233E-01

-3.6984E-01

4.8093E-01

-4.0545E-01

1.7787E-01

-2.8949E-02

S6

-1.9895E-02

1.7270E-02

3.1139E-01

-1.3909E+00

3.8660E+00

-6.5184E+00

6.5780E+00

-3.6309E+00

8.4710E-01

S7

-1.1424E-01

-3.6018E-03

8.0152E-02

-2.4922E-01

4.6736E-01

-5.6730E-01

4.5909E-01

-2.2859E-01

5.2945E-02

S8

-9.7608E-02

-2.5186E-03

-9.3522E-02

3.5023E-01

-7.4980E-01

9.3474E-01

-6.6651E-01

2.4852E-01

-3.6410E-02

S9

-7.4936E-02

-2.4770E-01

1.0808E+00

-3.2266E+00

5.8865E+00

-6.7553E+00

4.7039E+00

-1.8115E+00

2.9622E-01

S10

-8.5988E-02

-3.8878E-02

1.6135E-01

-3.4941E-01

4.3340E-01

-3.3496E-01

1.5627E-01

-3.8969E-02

3.9195E-03

S11

-6.8509E-02

-1.5564E-01

2.0050E-01

-1.1528E-01

-5.8955E-02

1.4805E-01

-1.0220E-01

3.1909E-02

-3.7916E-03

S12

2.0941E-02

-1.7321E-01

2.3856E-01

-2.1897E-01

1.3696E-01

-5.4778E-02

1.3278E-02

-1.7768E-03

1.0073E-04

S13

-7.2339E-02

1.5572E-02

5.6500E-03

-3.3500E-03

7.4781E-04

-9.3174E-05

6.7548E-06

-2.6305E-07

4.1664E-09

S14

-6.5782E-02

2.6850E-02

-8.8525E-03

2.2294E-03

-4.1599E-04

5.3713E-05

-4.3917E-06

1.9999E-07

-3.7909E-09

In embodiment 2, the effective focal length f1=3.46mm of the first lens, the effective focal length f2=-7.01mm of the second lens, The effective focal length f3=33.78mm of the third lens, the effective focal length f4=56.21mm of the 4th lens, effective coke of the 5th lens Away from f5=29.91mm, the effective focal length f6=-352.67mm of the 6th lens, the effective focal length f7=-4.73mm of the 7th lens. The effective focal length f=5.36mm, TTL=5.50mm, ImgH=4.15mm of the optical imaging system, wherein TTL is the first lens Distance of the center of the object side S1 of E1 to imaging surface S17 on optical axis, ImgH are pair of effective pixel area on imaging surface S17 The long half of linea angulata.It specifically may refer to table 21.

And the optical imaging system meets:

F × (ImgH/TTL)=3.90；F/EPD=2.06；F1/ | f3 |+f1/ | f6 |=0.11；F2/f7=1.48；|f/ F4 |+| f/f5 |=0.27；F/ | R4 |+f/ | R5 |=2.60；R9/R10=1.25；F/R11+f/R12=-2.43；R11/R12 =0.95；F/ (CT4+CT5+CT6)=5.98；T45/T56=0.83；T67/CT7=1.05；It specifically may refer to table 22.

In addition, Fig. 4 A shows chromatic curve on the axis of the optical imaging system of embodiment 2, the light of different wave length is indicated Line deviates via the converging focal point after system.Fig. 4 B shows the astigmatism curve of the optical imaging system of embodiment 2, indicates son Noon curvature of the image and sagittal image surface bending.Fig. 4 C shows the distortion curve of the optical imaging system of embodiment 2, indicates different Distortion sizes values in the case of visual angle.Fig. 4 D shows the ratio chromatism, curve of the optical imaging system of embodiment 2, indicates light Line via the different image heights after system on imaging surface deviation.According to Fig. 4 A to Fig. 4 D it is found that light given by embodiment 2 Learning imaging system can be realized good image quality.

Embodiment 3

As shown in figure 5, the optical imaging system successively includes the first lens along optical axis on from object side to the direction of image side E1, the second lens E2, diaphragm STO, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th lens E6, the 7th lens E7, Optical filter E8 and imaging surface S17.

First lens have positive light coke, and the object side of the first lens is convex surface, and to be aspherical, and image side surface is recessed Face, and be aspherical；Second lens have negative power, and the object side of the second lens is convex surface, and are aspherical, image side surface It for concave surface, and is aspherical；The third lens have positive light coke, and the object side of the third lens is convex surface, and to be aspherical, as Side is concave surface, and is aspherical；4th lens have positive light coke, and the object side of the 4th lens is convex surface, and are aspheric Face, image side surface are concave surface, and are aspherical；5th lens have positive light coke, and the object side of the 5th lens is concave surface, and is Aspherical, image side surface is convex surface, and is aspherical；6th lens have positive light coke, and the object side of the 6th lens is concave surface, And to be aspherical, image side surface is convex surface, and is aspherical；7th lens have negative power, and the object side of the 7th lens is Concave surface, and to be aspherical, image side surface is concave surface, and is aspherical.

Table 5 show the surface types of each lens of the optical imaging system of embodiment 3, radius of curvature, thickness, material and Circular cone coefficient, wherein radius of curvature and the unit of thickness are mm.

Table 5

The following table 6 gives the high-order coefficient A for aspherical mirror S1-S14 each in embodiment 3₄、A₆、A₈、A₁₀、A₁₂、 A₁₄、A₁₆And A₂₀。

Table 6

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

1.8778E-02

-5.5037E-03

2.7754E-02

-5.9895E-02

8.1014E-02

-7.0129E-02

3.7010E-02

-1.0904E-02

1.3480E-03

S2

-3.2467E-02

1.7411E-01

-3.5103E-01

4.4393E-01

-3.8276E-01

2.3024E-01

-9.5256E-02

2.4293E-02

-2.8173E-03

S3

-5.8120E-02

2.5820E-01

-4.9570E-01

6.2976E-01

-5.4068E-01

3.2464E-01

-1.3669E-01

3.6768E-02

-4.6135E-03

S4

-5.4273E-02

1.9469E-01

-3.2787E-01

5.3754E-01

-7.3222E-01

8.2159E-01

-6.3824E-01

2.7560E-01

-4.8564E-02

S5

-1.8951E-02

1.1131E-01

-5.5199E-02

2.5272E-02

4.7523E-02

-5.1003E-02

1.4246E-02

-4.1678E-03

3.5374E-03

S6

-2.2837E-02

6.5853E-02

7.7095E-02

-6.1064E-01

2.0731E+00

-3.8657E+00

4.1788E+00

-2.4272E+00

5.9293E-01

S7

-1.1899E-01

2.9885E-02

-1.3101E-01

6.2194E-01

-1.6457E+00

2.4767E+00

-2.1368E+00

9.8695E-01

-1.8799E-01

S8

-1.0476E-01

1.8537E-02

-1.2648E-01

4.4033E-01

-9.1286E-01

1.1001E+00

-7.6909E-01

2.8931E-01

-4.4747E-02

S9

-7.9571E-02

-2.0410E-01

6.4106E-01

-1.5040E+00

2.2155E+00

-2.0725E+00

1.1393E+00

-3.2790E-01

3.8233E-02

S10

-5.2974E-02

-2.1262E-01

6.0334E-01

-1.1455E+00

1.4153E+00

-1.1159E+00

5.2956E-01

-1.3491E-01

1.4016E-02

S11

-6.6247E-02

-1.3242E-01

5.1264E-02

1.0394E-01

-2.2885E-01

2.3480E-01

-1.3451E-01

4.0089E-02

-4.7687E-03

S12

3.5009E-02

-1.5146E-01

1.3598E-01

-8.7817E-02

4.9090E-02

-1.9657E-02

4.8125E-03

-6.3828E-04

3.5115E-05

S13

-7.5170E-02

2.0791E-02

2.2150E-03

-2.0579E-03

4.4730E-04

-4.9641E-05

2.9924E-06

-8.8776E-08

8.9371E-10

S14

-3.8012E-02

-5.9487E-03

1.0580E-02

-4.5387E-03

1.0417E-03

-1.4316E-04

1.1858E-05

-5.4792E-07

1.0862E-08

In embodiment 3, the effective focal length f1=3.50mm of the first lens, the effective focal length f2=-7.44mm of the second lens, The effective focal length f3=32.75mm of the third lens, the effective focal length f4=117.73mm of the 4th lens, effective coke of the 5th lens Away from f5=159.83mm, the effective focal length f6=104.71mm of the 6th lens, the effective focal length f7=-4.77mm of the 7th lens. The effective focal length f=5.72mm, TTL=5.60mm, ImgH=4.15mm of the optical imaging system, wherein TTL is the first lens Distance of the center of the object side S1 of E1 to imaging surface S17 on optical axis, ImgH are pair of effective pixel area on imaging surface S17 The long half of linea angulata.It specifically may refer to table 21.

And the optical imaging system meets:

F × (ImgH/TTL)=3.88；F/EPD=2.08；F1/ | f3 |+f1/ | f6 |=0.14；F2/f7=1.56；|f/ F4 |+| f/f5 |=0.08；F/ | R4 |+f/ | R5 |=2.81；R9/R10=1.06；F/R11+f/R12=-2.33；R11/R12 =1.06；F/ (CT4+CT5+CT6)=6.58；T45/T56=0.91；T67/CT7=0.98；It specifically may refer to table 22.

In addition, Fig. 6 A shows chromatic curve on the axis of the optical imaging system of embodiment 3, the light of different wave length is indicated Line deviates via the converging focal point after system.Fig. 6 B shows the astigmatism curve of the optical imaging system of embodiment 3, indicates son Noon curvature of the image and sagittal image surface bending.Fig. 6 C shows the distortion curve of the optical imaging system of embodiment 3, indicates different Distortion sizes values in the case of visual angle.Fig. 6 D shows the ratio chromatism, curve of the optical imaging system of embodiment 3, indicates light Line via the different image heights after system on imaging surface deviation.According to Fig. 6 A to Fig. 6 D it is found that light given by embodiment 3 Learning imaging system can be realized good image quality.

Embodiment 4

As shown in fig. 7, the optical imaging system successively includes the first lens along optical axis on from object side to the direction of image side E1, the second lens E2, the third lens E3, diaphragm STO, the 4th lens E4, the 5th lens E5, the 6th lens E6, the 7th lens E7, Optical filter E8 and imaging surface S17.

First lens have positive light coke, and the object side of the first lens is convex surface, and to be aspherical, and image side surface is convex Face, and be aspherical；Second lens have negative power, and the object side of the second lens is convex surface, and are aspherical, image side surface It for concave surface, and is aspherical；The third lens have negative power, and the object side of the third lens is convex surface, and to be aspherical, as Side is concave surface, and is aspherical；4th lens have positive light coke, and the object side of the 4th lens is convex surface, and are aspheric Face, image side surface are concave surface, and are aspherical；5th lens have positive light coke, and the object side of the 5th lens is concave surface, and is Aspherical, image side surface is convex surface, and is aspherical；6th lens have positive light coke, and the object side of the 6th lens is concave surface, And to be aspherical, image side surface is convex surface, and is aspherical；7th lens have negative power, and the object side of the 7th lens is Concave surface, and to be aspherical, image side surface is concave surface, and is aspherical.

Table 7 show the surface types of each lens of the optical imaging system of embodiment 4, radius of curvature, thickness, material and Circular cone coefficient, wherein radius of curvature and the unit of thickness are mm.

Table 7

The following table 8 gives the high-order coefficient A for aspherical mirror S1-S14 each in embodiment 4₄、A₆、A₈、A₁₀、A₁₂、 A₁₄、A₁₆And A₂₀。

Table 8

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

1.6151E-02

1.5675E-02

-4.9775E-02

8.6849E-02

-8.3571E-02

3.7900E-02

-1.5636E-03

-4.9282E-03

1.2472E-03

S2

-2.5364E-02

4.5978E-02

1.0375E-01

-3.6262E-01

4.6288E-01

-2.8087E-01

5.6452E-02

1.4863E-02

-5.9717E-03

S3

-3.0572E-02

4.9474E-02

2.1076E-01

-6.9183E-01

9.7862E-01

-7.4658E-01

3.0093E-01

-5.5634E-02

3.0280E-03

S4

-3.4953E-02

8.7644E-02

-2.6764E-01

1.2658E+00

-3.3682E+00

5.1631E+00

-4.4814E+00

2.0328E+00

-3.7374E-01

S5

-1.3736E-02

8.8419E-02

-2.6092E-01

1.2588E+00

-3.1461E+00

4.6626E+00

-3.9859E+00

1.8019E+00

-3.3236E-01

S6

-8.2739E-03

-6.9813E-02

7.4842E-01

-2.8135E+00

6.8812E+00

-1.0679E+01

1.0134E+01

-5.3151E+00

1.1818E+00

S7

-1.1132E-01

2.0848E-02

-3.1487E-01

1.7930E+00

-5.2310E+00

8.9196E+00

-8.9788E+00

4.9497E+00

-1.1502E+00

S8

-1.0637E-01

8.5860E-02

-6.1511E-01

2.0375E+00

-4.0471E+00

4.9834E+00

-3.7396E+00

1.5688E+00

-2.8126E-01

S9

-9.2799E-02

-3.1792E-02

2.9057E-02

-5.9083E-01

1.6827E+00

-2.2667E+00

1.6036E+00

-5.8145E-01

8.7315E-02

S10

-7.3979E-02

1.8137E-02

-8.4326E-02

-4.1651E-02

3.3882E-01

-4.5076E-01

2.7462E-01

-8.0245E-02

9.0932E-03

S11

-1.1436E-01

-3.2578E-02

2.2035E-01

-5.8669E-01

6.8991E-01

-4.1263E-01

1.2337E-01

-1.4874E-02

1.1868E-04

S12

-4.1280E-02

2.3065E-02

-1.8941E-02

-3.8819E-02

6.3544E-02

-3.7107E-02

1.0907E-02

-1.6292E-03

9.8574E-05

S13

-7.5697E-02

2.6079E-02

-5.5623E-03

2.4925E-03

-9.6675E-04

2.0516E-04

-2.3863E-05

1.4550E-06

-3.6613E-08

S14

-2.4146E-02

-1.9564E-02

1.7814E-02

-6.8808E-03

1.5077E-03

-1.9839E-04

1.5480E-05

-6.5893E-07

1.1774E-08

In embodiment 4, the effective focal length f1=3.16mm of the first lens, the effective focal length f2=-7.08mm of the second lens, The effective focal length f3=-83.93mm of the third lens, the effective focal length f4=31.49mm of the 4th lens, effective coke of the 5th lens Away from f5=200.42mm, the effective focal length f6=27.19mm of the 6th lens, the effective focal length f7=-4.69mm of the 7th lens.It should The effective focal length f=5.28mm, TTL=5.49mm, ImgH=4.00mm of optical imaging system, wherein TTL is the first lens E1 Object side S1 distance of the center to imaging surface S17 on optical axis, ImgH is the diagonal of effective pixel area on imaging surface S17 The half of wire length.It specifically may refer to table 21.

And the optical imaging system meets:

F × (ImgH/TTL)=3.85；F/EPD=2.13；F1/ | f3 |+f1/ | f6 |=0.15；F2/f7=1.51；|f/ F4 |+| f/f5 |=0.19；F/ | R4 |+f/ | R5 |=1.72；R9/R10=1.03；F/R11+f/R12=-2.50；R11/R12 =1.28；F/ (CT4+CT5+CT6)=5.43；T45/T56=0.81；T67/CT7=1.13；It specifically may refer to table 22.

In addition, Fig. 8 A shows chromatic curve on the axis of the optical imaging system of embodiment 4, the light of different wave length is indicated Line deviates via the converging focal point after system.Fig. 8 B shows the astigmatism curve of the optical imaging system of embodiment 4, indicates son Noon curvature of the image and sagittal image surface bending.Fig. 8 C shows the distortion curve of the optical imaging system of embodiment 4, indicates different Distortion sizes values in the case of visual angle.Fig. 8 D shows the ratio chromatism, curve of the optical imaging system of embodiment 4, indicates light Line via the different image heights after system on imaging surface deviation.According to Fig. 8 A to Fig. 8 D it is found that light given by embodiment 4 Learning imaging system can be realized good image quality.

Embodiment 5

As shown in figure 9, the optical imaging system successively includes the first lens along optical axis on from object side to the direction of image side E1, the second lens E2, the third lens E3, diaphragm STO, the 4th lens E4, the 5th lens E5, the 6th lens E6, the 7th lens E7, Optical filter E8 and imaging surface S17.

First lens have positive light coke, and the object side of the first lens is convex surface, and to be aspherical, and image side surface is recessed Face, and be aspherical；Second lens have negative power, and the object side of the second lens is concave surface, and are aspherical, image side surface It for concave surface, and is aspherical；The third lens have positive light coke, and the object side of the third lens is convex surface, and to be aspherical, as Side is concave surface, and is aspherical；4th lens have positive light coke, and the object side of the 4th lens is convex surface, and are aspheric Face, image side surface are concave surface, and are aspherical；5th lens have positive light coke, and the object side of the 5th lens is concave surface, and is Aspherical, image side surface is convex surface, and is aspherical；6th lens have positive light coke, and the object side of the 6th lens is concave surface, And to be aspherical, image side surface is convex surface, and is aspherical；7th lens have negative power, and the object side of the 7th lens is Concave surface, and to be aspherical, image side surface is concave surface, and is aspherical.

Table 9 show the surface types of each lens of the optical imaging system of embodiment 5, radius of curvature, thickness, material and Circular cone coefficient, wherein radius of curvature and the unit of thickness are mm.

Table 9

The following table 10 gives the high-order coefficient A for aspherical mirror S1-S14 each in embodiment 5₄、A₆、A₈、A₁₀、 A₁₂、A₁₄、A₁₆And A₂₀。

Table 10

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

1.8655E-02

-6.6450E-03

3.2420E-02

-7.5356E-02

1.0382E-01

-8.9582E-02

4.6758E-02

-1.3640E-02

1.6942E-03

S2

-1.4879E-02

7.0963E-02

-1.0147E-01

5.6826E-02

5.0876E-02

-1.1724E-01

8.8060E-02

-3.0754E-02

4.1546E-03

S3

-2.2893E-02

1.3695E-01

-2.5780E-01

3.1362E-01

-2.1314E-01

4.9346E-02

2.7842E-02

-2.0136E-02

3.6689E-03

S4

-3.3100E-02

1.1017E-01

-2.3719E-01

5.5169E-01

-9.7182E-01

1.3240E+00

-1.1720E+00

5.5588E-01

-1.0559E-01

S5

-1.8154E-02

1.0771E-01

-2.4146E-01

7.8321E-01

-1.4975E+00

1.9752E+00

-1.6457E+00

7.4720E-01

-1.3858E-01

S6

-1.8096E-02

5.8865E-02

-5.0018E-02

9.8054E-02

1.1255E-01

-5.5194E-01

8.0059E-01

-5.2923E-01

1.4052E-01

S7

-1.1413E-01

2.3996E-02

-1.8080E-01

7.2660E-01

-1.7307E+00

2.5515E+00

-2.2412E+00

1.0743E+00

-2.1421E-01

S8

-9.3513E-02

-3.9424E-02

5.1971E-02

-5.7062E-02

-3.6598E-02

1.8054E-01

-2.0019E-01

9.8330E-02

-1.8246E-02

S9

-9.9395E-02

-7.5509E-02

2.4647E-01

-7.4935E-01

1.3890E+00

-1.7038E+00

1.2942E+00

-5.4849E-01

9.9150E-02

S10

-9.3961E-02

2.8748E-02

-9.6774E-02

2.5705E-01

-4.1354E-01

3.8945E-01

-2.1545E-01

6.5210E-02

-8.2562E-03

S11

-1.2201E-01

1.3854E-02

-1.0986E-01

2.5231E-01

-3.1273E-01

2.4114E-01

-1.1328E-01

2.9027E-02

-3.0579E-03

S12

-8.4655E-03

-8.5086E-02

1.1029E-01

-9.7284E-02

6.2081E-02

-2.5421E-02

6.1917E-03

-8.1468E-04

4.4377E-05

S13

-7.2519E-02

1.8401E-02

2.4322E-03

-2.1522E-03

5.3109E-04

-7.4582E-05

6.4580E-06

-3.2241E-07

7.1072E-09

S14

-5.3788E-02

1.9760E-02

-5.6469E-03

1.2262E-03

-2.0674E-04

2.5647E-05

-2.1172E-06

1.0059E-07

-2.0356E-09

In embodiment 5, the effective focal length f1=3.31mm of the first lens, the effective focal length f2=-6.78mm of the second lens, The effective focal length f3=56.98mm of the third lens, the effective focal length f4=35.97mm of the 4th lens, effective coke of the 5th lens Away from f5=2847.10mm, the effective focal length f6=26.22mm of the 6th lens, the effective focal length f7=-4.51mm of the 7th lens. The effective focal length f=5.32mm, TTL=5.63mm, ImgH=4.15mm of the optical imaging system, wherein TTL is the first lens Distance of the center of the object side S1 of E1 to imaging surface S17 on optical axis, ImgH are pair of effective pixel area on imaging surface S17 The long half of linea angulata.It specifically may refer to table 21.

And the optical imaging system meets:

F × (ImgH/TTL)=3.59；F/EPD=2.15；F1/ | f3 |+f1/ | f6 |=0.18；F2/f7=1.50；|f/ F4 |+| f/f5 |=0.15；F/ | R4 |+f/ | R5 |=1.77；R9/R10=0.99；F/R11+f/R12=-2.43；R11/R12 =1.31；F/ (CT4+CT5+CT6)=5.20；T45/T56=0.77；T67/CT7=1.14；It specifically may refer to table 22.

In addition, Figure 10 A shows chromatic curve on the axis of the optical imaging system of embodiment 5, different wave length is indicated Light deviates via the converging focal point after system.Figure 10 B shows the astigmatism curve of the optical imaging system of embodiment 5, table Show meridianal image surface bending and sagittal image surface bending.Figure 10 C shows the distortion curve of the optical imaging system of embodiment 5, table Show the distortion sizes values in the case of different perspectives.Figure 10 D shows the ratio chromatism, curve of the optical imaging system of embodiment 5, It indicates light via the deviation of the different image heights after system on imaging surface.According to Figure 10 A to Figure 10 D it is found that embodiment 5 Given optical imaging system can be realized good image quality.

Embodiment 6

As shown in figure 11, along optical axis on from object side to the direction of image side, which successively includes the first lens E1, the second lens E2, the third lens E3, diaphragm STO, the 4th lens E4, the 5th lens E5, the 6th lens E6, the 7th lens E7, Optical filter E8 and imaging surface S17.

First lens have positive light coke, and the object side of the first lens is convex surface, and to be aspherical, and image side surface is recessed Face, and be aspherical；Second lens have negative power, and the object side of the second lens is convex surface, and are aspherical, image side surface It for concave surface, and is aspherical；The third lens have negative power, and the object side of the third lens is concave surface, and to be aspherical, as Side is concave surface, and is aspherical；4th lens have positive light coke, and the object side of the 4th lens is convex surface, and are aspheric Face, image side surface are concave surface, and are aspherical；5th lens have negative power, and the object side of the 5th lens is concave surface, and is Aspherical, image side surface is convex surface, and is aspherical；6th lens have positive light coke, and the object side of the 6th lens is concave surface, And to be aspherical, image side surface is convex surface, and is aspherical；7th lens have negative power, and the object side of the 7th lens is Concave surface, and to be aspherical, image side surface is concave surface, and is aspherical.

Table 11 shows surface type, radius of curvature, thickness, the material of each lens of the optical imaging system of embodiment 6 And circular cone coefficient, wherein radius of curvature and the unit of thickness are mm.

Table 11

The following table 12 gives the high-order coefficient A for aspherical mirror S1-S14 each in embodiment 6₄、A₆、A₈、A₁₀、 A₁₂、A₁₄、A₁₆And A₂₀。

Table 12

In embodiment 6, the effective focal length f1=3.26mm of the first lens, the effective focal length f2=-8.01mm of the second lens, The effective focal length f3=-462.35mm of the third lens, the effective focal length f4=120.74mm of the 4th lens, the 5th lens it is effective Focal length f5=-2609.2mm, the effective focal length f6=16.05mm of the 6th lens, the effective focal length f7=- of the 7th lens 4.09mm.The effective focal length f=5.39mm, TTL=5.67mm, ImgH=4.15mm of the optical imaging system, wherein TTL is Distance of the center of the object side S1 of first lens E1 to imaging surface S17 on optical axis, ImgH are valid pixel on imaging surface S17 The half of the diagonal line length in region.It specifically may refer to table 21.

And the optical imaging system meets:

F × (ImgH/TTL)=3.80；F/EPD=2.10；F1/ | f3 |+f1/ | f6 |=0.21；F2/f7=1.96；|f/ F4 |+| f/f5 |=0.05；F/ | R4 |+f/ | R5 |=1.11；R9/R10=0.98；F/R11+f/R12=-2.36；R11/R12 =1.65；F/ (CT4+CT5+CT6)=5.33；T45/T56=0.75；T67/CT7=1.17；It specifically may refer to table 22.

In addition, Figure 12 A shows chromatic curve on the axis of the optical imaging system of embodiment 6, different wave length is indicated Light deviates via the converging focal point after system.Figure 12 B shows the astigmatism curve of the optical imaging system of embodiment 6, table Show meridianal image surface bending and sagittal image surface bending.Figure 12 C shows the distortion curve of the optical imaging system of embodiment 6, table Show the distortion sizes values in the case of different perspectives.Figure 12 D shows the ratio chromatism, curve of the optical imaging system of embodiment 6, It indicates light via the deviation of the different image heights after system on imaging surface.According to Figure 12 A to Figure 12 D it is found that embodiment 6 Given optical imaging system can be realized good image quality.

Embodiment 7

As shown in figure 13, along optical axis on from object side to the direction of image side, which successively includes the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th lens E6, the 7th lens E7, optical filter E8 With imaging surface S17.

First lens have positive light coke, and the object side of the first lens is convex surface, and to be aspherical, and image side surface is recessed Face, and be aspherical；Second lens have negative power, and the object side of the second lens is convex surface, and are aspherical, image side surface It for concave surface, and is aspherical；The third lens have positive light coke, and the object side of the third lens is convex surface, and to be aspherical, as Side is convex surface, and is aspherical；4th lens have negative power, and the object side of the 4th lens is concave surface, and are aspheric Face, image side surface are concave surface, and are aspherical；5th lens have positive light coke, and the object side of the 5th lens is concave surface, and is Aspherical, image side surface is convex surface, and is aspherical；6th lens have positive light coke, and the object side of the 6th lens is concave surface, And to be aspherical, image side surface is convex surface, and is aspherical；7th lens have negative power, and the object side of the 7th lens is Concave surface, and to be aspherical, image side surface is concave surface, and is aspherical.

Table 13 shows surface type, radius of curvature, thickness, the material of each lens of the optical imaging system of embodiment 7 And circular cone coefficient, wherein radius of curvature and the unit of thickness are mm.

Table 13

The following table 14 gives the high-order coefficient A for aspherical mirror S1-S14 each in embodiment 7₄、A₆、A₈、A₁₀、 A₁₂、A₁₄、A₁₆And A₂₀。

Table 14

In embodiment 7, the effective focal length f1=3.62mm of the first lens, the effective focal length f2=-7.97mm of the second lens, The effective focal length f3=16.93mm of the third lens, the effective focal length f4=-77.29mm of the 4th lens, effective coke of the 5th lens Away from f5=42.10mm, the effective focal length f6=43.06mm of the 6th lens, the effective focal length f7=-4.30mm of the 7th lens.It should The effective focal length f=5.35mm, TTL=5.58mm, ImgH=4.15mm of optical imaging system, wherein TTL is the first lens E1 Object side S1 distance of the center to imaging surface S17 on optical axis, ImgH is the diagonal of effective pixel area on imaging surface S17 The half of wire length.It specifically may refer to table 21.

And the optical imaging system meets:

F × (ImgH/TTL)=3.98；F/EPD=2.06；F1/ | f3 |+f1/ | f6 |=0.30；F2/f7=1.85；|f/ F4 |+| f/f5 |=0.20；F/ | R4 |+f/ | R5 |=1.95；R9/R10=1.19；F/R11+f/R12=-2.43；R11/R12 =1.17；F/ (CT4+CT5+CT6)=5.50；T45/T56=0.72；T67/CT7=1.18；It specifically may refer to table 22.

In addition, Figure 14 A shows chromatic curve on the axis of the optical imaging system of embodiment 7, different wave length is indicated Light deviates via the converging focal point after system.Figure 14 B shows the astigmatism curve of the optical imaging system of embodiment 7, table Show meridianal image surface bending and sagittal image surface bending.Figure 14 C shows the distortion curve of the optical imaging system of embodiment 7, table Show the distortion sizes values in the case of different perspectives.Figure 14 D shows the ratio chromatism, curve of the optical imaging system of embodiment 7, It indicates light via the deviation of the different image heights after system on imaging surface.According to Figure 14 A to Figure 14 D it is found that embodiment 7 Given optical imaging system can be realized good image quality.

Embodiment 8

As shown in figure 15, along optical axis on from object side to the direction of image side, which successively includes the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th lens E6, the 7th lens E7, optical filter E8 With imaging surface S17.

First lens have positive light coke, and the object side of the first lens is convex surface, and to be aspherical, and image side surface is recessed Face, and be aspherical；Second lens have negative power, and the object side of the second lens is convex surface, and are aspherical, image side surface It for concave surface, and is aspherical；The third lens have positive light coke, and the object side of the third lens is convex surface, and to be aspherical, as Side is concave surface, and is aspherical；4th lens have positive light coke, and the object side of the 4th lens is concave surface, and are aspheric Face, image side surface are convex surface, and are aspherical；5th lens have positive light coke, and the object side of the 5th lens is concave surface, and is Aspherical, image side surface is convex surface, and is aspherical；6th lens have positive light coke, and the object side of the 6th lens is concave surface, And to be aspherical, image side surface is convex surface, and is aspherical；7th lens have negative power, and the object side of the 7th lens is Concave surface, and to be aspherical, image side surface is concave surface, and is aspherical.

Table 15 shows surface type, radius of curvature, thickness, the material of each lens of the optical imaging system of embodiment 8 And circular cone coefficient, wherein radius of curvature and the unit of thickness are mm.

Table 15

The following table 16 gives the high-order coefficient A for aspherical mirror S1-S14 each in embodiment 8₄、A₆、A₈、A₁₀、 A₁₂、A₁₄、A₁₆And A₂₀。

Table 16

In embodiment 8, the effective focal length f1=3.54mm of the first lens, the effective focal length f2=-7.47mm of the second lens, The effective focal length f3=20.75mm of the third lens, the effective focal length f4=127.08mm of the 4th lens, effective coke of the 5th lens Away from f5=84.45mm, the effective focal length f6=22.05mm of the 6th lens, the effective focal length f7=-3.75mm of the 7th lens.It should The effective focal length f=5.23mm, TTL=5.35mm, ImgH=4.00mm of optical imaging system, wherein TTL is the first lens E1 Object side S1 distance of the center to imaging surface S17 on optical axis, ImgH is the diagonal of effective pixel area on imaging surface S17 The half of wire length.It specifically may refer to table 21.

And the optical imaging system meets:

F × (ImgH/TTL)=3.72；F/EPD=2.05；F1/ | f3 |+f1/ | f6 |=0.33；F2/f7=1.99；|f/ F4 |+| f/f5 |=0.103；F/ | R4 |+f/ | R5 |=2.55；R9/R10=1.14；F/R11+f/R12=-2.51；R11/R12 =1.38；F/ (CT4+CT5+CT6)=5.79；T45/T56=0.78；T67/CT7=1.54；It specifically may refer to table 22.

In addition, Figure 16 A shows chromatic curve on the axis of the optical imaging system of embodiment 8, different wave length is indicated Light deviates via the converging focal point after system.Figure 16 B shows the astigmatism curve of the optical imaging system of embodiment 8, table Show meridianal image surface bending and sagittal image surface bending.Figure 16 C shows the distortion curve of the optical imaging system of embodiment 8, table Show the distortion sizes values in the case of different perspectives.Figure 16 D shows the ratio chromatism, curve of the optical imaging system of embodiment 8, It indicates light via the deviation of the different image heights after system on imaging surface.According to Figure 16 A to Figure 16 D it is found that embodiment 8 Given optical imaging system can be realized good image quality.

Embodiment 9

As shown in figure 17, along optical axis on from object side to the direction of image side, which successively includes the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th lens E6, the 7th lens E7, optical filter E8 With imaging surface S17.

First lens have positive light coke, and the object side of the first lens is convex surface, and to be aspherical, and image side surface is recessed Face, and be aspherical；Second lens have negative power, and the object side of the second lens is convex surface, and are aspherical, image side surface It for concave surface, and is aspherical；The third lens have positive light coke, and the object side of the third lens is convex surface, and to be aspherical, as Side is concave surface, and is aspherical；4th lens have positive light coke, and the object side of the 4th lens is convex surface, and are aspheric Face, image side surface are convex surface, and are aspherical；5th lens have negative power, and the object side of the 5th lens is concave surface, and is Aspherical, image side surface is convex surface, and is aspherical；6th lens have positive light coke, and the object side of the 6th lens is concave surface, And to be aspherical, image side surface is convex surface, and is aspherical；7th lens have negative power, and the object side of the 7th lens is Concave surface, and to be aspherical, image side surface is concave surface, and is aspherical.

Table 17 shows surface type, radius of curvature, thickness, the material of each lens of the optical imaging system of embodiment 9 And circular cone coefficient, wherein radius of curvature and the unit of thickness are mm.

Table 17

The following table 18 gives the high-order coefficient A for aspherical mirror S1-S14 each in embodiment 9₄、A₆、A₈、A₁₀、 A₁₂、A₁₄、A₁₆And A₂₀。

Table 18

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

2.1073E-02

5.1190E-03

-7.1910E-03

1.8367E-03

2.1632E-02

-4.9886E-02

4.8119E-02

-2.2324E-02

3.9792E-03

S2

-7.1886E-03

6.2535E-02

-2.4593E-01

6.3309E-01

-9.9057E-01

9.9029E-01

-6.1073E-01

2.0681E-01

-2.9050E-02

S3

-1.1073E-02

6.0805E-02

-1.8655E-01

4.7008E-01

-7.2064E-01

7.3224E-01

-4.8093E-01

1.7892E-01

-2.7921E-02

S4

-1.7457E-02

6.3497E-02

-2.8087E-01

1.1480E+00

-2.8075E+00

4.4671E+00

-4.2454E+00

2.1252E+00

-4.2790E-01

S5

-1.0874E-02

8.3675E-02

-3.4136E-01

1.4649E+00

-3.5381E+00

5.5417E+00

-5.1866E+00

2.5809E+00

-5.2238E-01

S6

-1.9956E-02

3.3918E-02

1.4129E-02

-6.3683E-02

3.8037E-01

-7.7345E-01

8.7897E-01

-5.1461E-01

1.2781E-01

S7

-1.0631E-01

6.9856E-02

-5.5841E-01

2.3557E+00

-6.1105E+00

9.8407E+00

-9.5300E+00

5.0830E+00

-1.1448E+00

S8

-9.5116E-02

-2.4048E-02

4.5066E-03

5.1721E-02

-2.2712E-01

3.8319E-01

-3.1877E-01

1.2804E-01

-1.8384E-02

S9

-8.3613E-02

-2.0991E-01

7.0447E-01

-1.7969E+00

3.0531E+00

-3.4660E+00

2.4652E+00

-9.9018E-01

1.7137E-01

S10

-6.4665E-02

-1.0662E-01

2.3116E-01

-2.8746E-01

2.2470E-01

-1.0987E-01

2.8660E-02

-1.7944E-03

-4.2485E-04

S11

-8.5932E-02

-1.5290E-02

-1.9669E-01

4.7591E-01

-5.8341E-01

4.4006E-01

-2.0196E-01

5.0868E-02

-5.3181E-03

S12

3.1150E-02

-1.0632E-01

7.6552E-02

-4.1098E-02

2.3360E-02

-1.0166E-02

2.6678E-03

-3.7386E-04

2.1546E-05

S13

-1.0673E-01

7.2827E-02

-3.8401E-02

1.5473E-02

-4.1483E-03

7.0766E-04

-7.4147E-05

4.3715E-06

-1.1149E-07

S14

-5.8743E-02

2.4138E-02

-7.3408E-03

1.4367E-03

-1.8627E-04

1.6568E-05

-1.0313E-06

4.2583E-08

-8.6619E-10

In embodiment 9, the effective focal length f1=3.56mm of the first lens, the effective focal length f2=-6.63mm of the second lens, The effective focal length f3=19.25mm of the third lens, the effective focal length f4=30.87mm of the 4th lens, effective coke of the 5th lens Away from f5=-342.82mm, the effective focal length f6=13.98mm of the 6th lens, the effective focal length f7=-3.65mm of the 7th lens. The effective focal length f=5.02mm, TTL=5.25mm, ImgH=4.00mm of the optical imaging system, wherein TTL is the first lens Distance of the center of the object side S1 of E1 to imaging surface S17 on optical axis, ImgH are pair of effective pixel area on imaging surface S17 The long half of linea angulata.It specifically may refer to table 21.

And the optical imaging system meets:

F × (ImgH/TTL)=3.82；F/EPD=2.11；F1/ | f3 |+f1/ | f6 |=0.44；F2/f7=1.82；|f/ F4 |+| f/f5 |=0.18；F/ | R4 |+f/ | R5 |=2.79；R9/R10=0.92；F/R11+f/R12=-2.25；R11/R12 =1.78；F/ (CT4+CT5+CT6)=5.48；T45/T56=0.74；T67/CT7=1.44；It specifically may refer to table 22.

In addition, Figure 18 A shows chromatic curve on the axis of the optical imaging system of embodiment 9, different wave length is indicated Light deviates via the converging focal point after system.Figure 18 B shows the astigmatism curve of the optical imaging system of embodiment 9, table Show meridianal image surface bending and sagittal image surface bending.Figure 18 C shows the distortion curve of the optical imaging system of embodiment 9, table Show the distortion sizes values in the case of different perspectives.Figure 18 D shows the ratio chromatism, curve of the optical imaging system of embodiment 9, It indicates light via the deviation of the different image heights after system on imaging surface.According to Figure 18 A to Figure 18 D it is found that embodiment 9 Given optical imaging system can be realized good image quality.

Embodiment 10

As shown in figure 19, along optical axis on from object side to the direction of image side, which successively includes the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th lens E6, the 7th lens E7, optical filter E8 With imaging surface S17.

First lens have positive light coke, and the object side of the first lens is convex surface, and to be aspherical, and image side surface is recessed Face, and be aspherical；Second lens have negative power, and the object side of the second lens is convex surface, and are aspherical, image side surface It for concave surface, and is aspherical；The third lens have positive light coke, and the object side of the third lens is convex surface, and to be aspherical, as Side is concave surface, and is aspherical；4th lens have positive light coke, and the object side of the 4th lens is convex surface, and are aspheric Face, image side surface are concave surface, and are aspherical；5th lens have positive light coke, and the object side of the 5th lens is concave surface, and is Aspherical, image side surface is convex surface, and is aspherical；6th lens have positive light coke, and the object side of the 6th lens is concave surface, And to be aspherical, image side surface is convex surface, and is aspherical；7th lens have negative power, and the object side of the 7th lens is Concave surface, and to be aspherical, image side surface is convex surface, and is aspherical.

Table 19 shows surface type, radius of curvature, thickness, the material of each lens of the optical imaging system of embodiment 10 And circular cone coefficient, wherein radius of curvature and the unit of thickness are mm.

Table 19

The following table 20 gives the high-order coefficient A for aspherical mirror S1-S14 each in embodiment 10₄、A₆、A₈、A₁₀、 A₁₂、A₁₄、A₁₆And A₂₀。

Table 20

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

2.3052E-02

-3.2315E-02

1.3194E-01

-2.9941E-01

4.1762E-01

-3.6192E-01

1.8901E-01

-5.4513E-02

6.6362E-03

S2

-2.3678E-02

9.7976E-02

-1.6334E-01

2.2668E-01

-2.8045E-01

2.6083E-01

-1.5473E-01

5.0425E-02

-6.8120E-03

S3

-3.7236E-02

1.4091E-01

-1.9723E-01

2.0747E-01

-1.9742E-01

1.7351E-01

-1.0866E-01

3.7584E-02

-5.1544E-03

S4

-3.7742E-02

1.4786E-01

-3.7170E-01

1.0733E+00

-2.1985E+00

2.9210E+00

-2.3281E+00

9.9436E-01

-1.7383E-01

S5

-6.4375E-03

2.6242E-03

3.3226E-01

-8.7183E-01

1.3602E+00

-1.1864E+00

5.4635E-01

-1.1236E-01

5.9239E-03

S6

-3.0674E-02

1.3815E-01

-4.2923E-01

1.2270E+00

-1.8881E+00

1.4473E+00

-1.8633E-01

-4.0628E-01

1.8539E-01

S7

-1.0276E-01

-8.2910E-02

4.8759E-01

-1.4917E+00

2.6761E+00

-2.8386E+00

1.6971E+00

-4.8858E-01

4.0553E-02

S8

-1.0223E-01

5.5014E-02

-3.3736E-01

9.8259E-01

-1.8122E+00

2.0842E+00

-1.4417E+00

5.4628E-01

-8.6172E-02

S9

-9.4255E-02

-2.1107E-01

1.0523E+00

-3.1207E+00

5.4877E+00

-6.0323E+00

4.0436E+00

-1.5140E+00

2.4321E-01

S10

-1.0509E-01

2.2563E-02

2.2213E-02

-9.8322E-02

1.2676E-01

-8.5162E-02

2.9352E-02

-3.6840E-03

-1.2175E-04

S11

-6.9778E-02

-1.9795E-01

4.2600E-01

-5.3237E-01

3.6284E-01

-1.0859E-01

-7.3157E-03

1.1991E-02

-1.9600E-03

S12

-2.2261E-03

-1.2552E-01

2.0396E-01

-2.1110E-01

1.4016E-01

-5.7534E-02

1.4110E-02

-1.8980E-03

1.0778E-04

S13

-6.4986E-02

8.4802E-03

9.0001E-03

-4.1905E-03

8.6312E-04

-1.0115E-04

6.9432E-06

-2.5901E-07

4.0231E-09

S14

3.4969E-04

-2.3409E-02

1.4150E-02

-4.5591E-03

8.8626E-04

-1.0654E-04

7.7304E-06

-3.0926E-07

5.2233E-09

In embodiment 10, the effective focal length f1=3.47mm of the first lens, the effective focal length f2=- of the second lens 7.14mm, effective focal length f3=40.11mm, the effective focal length f4=50.48mm of the 4th lens of the third lens, the 5th lens Effective focal length f5=52.17mm, the effective focal length f6=21.09mm of the 6th lens, the effective focal length f7=- of the 7th lens 4.45mm.The effective focal length f=5.29mm, TTL=5.41mm, ImgH=4.15mm of the optical imaging system, wherein TTL is Distance of the center of the object side S1 of first lens E1 to imaging surface S17 on optical axis, ImgH are valid pixel on imaging surface S17 The half of the diagonal line length in region.It specifically may refer to table 21.

And the optical imaging system meets:

F × (ImgH/TTL)=3.71；F/EPD=2.07；F1/ | f3 |+f1/ | f6 |=0.25；F2/f7=1.61；|f/ F4 |+| f/f5 |=0.21；F/ | R4 |+f/ | R5 |=2.59；R9/R10=1.15；F/R11+f/R12=-2.18；R11/R12 =1.49；F/ (CT4+CT5+CT6)=5.48；T45/T56=0.76；T67/CT7=1.36；It specifically may refer to table 22.

In addition, Figure 20 A shows chromatic curve on the axis of the optical imaging system of embodiment 10, different wave length is indicated Light deviates via the converging focal point after system.Figure 20 B shows the astigmatism curve of the optical imaging system of embodiment 10, table Show meridianal image surface bending and sagittal image surface bending.Figure 20 C shows the distortion curve of the optical imaging system of embodiment 10, table Show the distortion sizes values in the case of different perspectives.Figure 20 D shows the ratio chromatism, curve of the optical imaging system of embodiment 10, It indicates light via the deviation of the different image heights after system on imaging surface.0A to Figure 20 D is it is found that embodiment according to fig. 2 Optical imaging system given by 10 can be realized good image quality.

In the optical imaging system of embodiment 1-10, effective focal length, the effective focal length of system, TTL, HFOV of each lens And the specific value of ImgH is shown in Table 21.

Table 21

In optical imaging system in embodiment 1-10, f × (ImgH/TTL), f/EPD, f1/ | f3 |+f1/ | f6 |, f2/ f7、|f/f4|+|f/f5、f/|R4|+f/|R5、R9/R10、f/R11+f/R12、R11/R12、f/(CT4+CT5+CT6)、T45/ The specific value of T56 and T67/CT7 is shown in Table 22.

Table 22

It can be seen from the above description that the application the above embodiments realize following technical effect:

1), in the optical imaging system of the application, just by each power of lens in reasonable control system Negative distribution, carrys out the low order aberration of effectively balance optical imaging system so that the imaging system of optical imaging system at image quality It measures higher；Meanwhile passing through effective pixel area on the imaging surface of the effective focal length, optical imaging system that optimize optical imaging system Relationship of the object side of the numerical value of the half of diagonal line length and the first lens to imaging surface between the distance on optical axis, control F × (ImgH/TTL) is greater than 3.5 and less than 4.5, can reasonably control the overall length and image height of optical imaging system, avoid image height It is too small, be conducive to the miniaturization of optical imaging system.

2), in the optical imaging system of the application, just by each power of lens in reasonable control system Negative distribution and light-inletting quantity, carry out the low order aberration of effectively balance optical imaging system, so that the imaging system of optical imaging system Image quality it is higher.

It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.

Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments It is not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be appreciated that for ease of description, each portion shown in attached drawing The size divided not is to draw according to actual proportionate relationship.For technology, side known to person of ordinary skill in the relevant Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation A part of book.In shown here and discussion all examples, any occurrence should be construed as merely illustratively, and Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should also be noted that similar label Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached It does not need that it is further discussed in figure.

For ease of description, spatially relative term can be used herein, as " ... on ", " ... top ", " ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction " Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and " in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and And respective explanations are made to the opposite description in space used herein above.

It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, work, device, component and/or their combination.

It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, " Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way Data be interchangeable under appropriate circumstances, so that presently filed embodiment described herein can be in addition to illustrating herein Or the sequence other than those of description is implemented.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims

1. a kind of optical imaging system, along optical axis successively include from object side to image side the first lens, the second lens, the third lens, 4th lens, the 5th lens, the 6th lens and the 7th lens, which is characterized in that

First lens have positive light coke；

Second lens have negative power；

The object side of 6th lens is concave surface；

7th lens have negative power；

Wherein, f is the effective focal length of the optical imaging system, and the effective focal length of the 4th lens is f4, and the described 5th thoroughly The effective focal length of mirror is f5, | f/f4 |+| f/f5 |≤0.3.

2. optical imaging system according to claim 1, which is characterized in that the Entry pupil diameters of the optical imaging system are EPD, f/EPD < 2.2.

3. optical imaging system according to claim 1, which is characterized in that the effective focal length of first lens is f1, The effective focal length of the third lens is f3, and the effective focal length of the 6th lens is f6, f1/ | f3 |+f1/ | and f6 | < 0.5.

4. optical imaging system according to claim 1, which is characterized in that the effective focal length of second lens is f2, The effective focal length of 7th lens is f7,1.4≤f2/f7≤2.0.

5. optical imaging system according to any one of claim 1 to 4, which is characterized in that the picture of second lens The radius of curvature of side is R4, and the radius of curvature of the object side of the third lens is R5,1.0 < f/ | R4 |+f/ | and R5 | < 3.0.

6. optical imaging system according to any one of claim 1 to 4, which is characterized in that the object of the 5th lens The radius of curvature of side is R9, and the radius of curvature of the image side surface of the 5th lens is R10,0.8 < R9/R10 < 1.5.

7. optical imaging system according to any one of claim 1 to 4, which is characterized in that the object of the 6th lens The radius of curvature of side is R11, and the radius of curvature of the image side surface of the 6th lens is R12, -4.0 < f/R11+f/R12 < - 2.0。

8. optical imaging system according to any one of claim 1 to 4, which is characterized in that the object of the 6th lens The radius of curvature of side is R11, and the radius of curvature of the image side surface of the 6th lens is R12,0.8 < R11/R12 < 2.0.

9. optical imaging system according to any one of claim 1 to 4, which is characterized in that the 4th lens, described The center thickness of 5th lens and the 6th lens on the optical axis is respectively CT4, CT5 and CT6,5 < f/ (CT4+CT5 +CT6)<7。

10. optical imaging system according to any one of claim 1 to 4, which is characterized in that the 4th lens and institute Stating spacing of the 5th lens on the optical axis is T45, between the 5th lens and the 6th lens are on the optical axis Away from for T56,0.6 < T45/T56 < 1.0.

11. optical imaging system according to any one of claim 1 to 4, which is characterized in that the 6th lens and institute State spacing of the 7th lens on the optical axis be T67, center thickness of the 7th lens on the optical axis be CT7,0.9 ≤T67/CT7≤1.6。

12. a kind of optical imaging system, along optical axis successively include from object side to image side the first lens, the second lens, the third lens, 4th lens, the 5th lens, the 6th lens and the 7th lens, which is characterized in that

First lens have positive light coke；

Second lens have negative power；

The object side of 6th lens is concave surface；

7th lens have negative power；

Wherein, 3.5 < f × (ImgH/TTL) < 4.5, f be the optical imaging system effective focal length, ImgH be the optics at As system imaging surface on effective pixel area diagonal line length half, TTL be first lens object side to it is described at Distance of the image planes on the optical axis.