CN107315236A

CN107315236A - Imaging lens system group

Info

Publication number: CN107315236A
Application number: CN201710735300.8A
Authority: CN
Inventors: 王新权
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2017-08-24
Filing date: 2017-08-24
Publication date: 2017-11-03
Anticipated expiration: 2037-08-24
Also published as: CN107315236B

Abstract

This application discloses a kind of imaging lens system group, the imaging lens system group is sequentially included along optical axis by thing side to image side：First lens, the second lens, the 3rd lens and the 4th lens.The thing side of first lens and the second lens is convex surface；The image side surface of 3rd lens is convex surface；The image side surface of 4th lens is concave surface；First lens and the 3rd lens are respectively provided with positive light coke；Second lens and the 4th lens are respectively provided with positive light coke or negative power；Total effective focal length f of the imaging lens system group and Entry pupil diameters EPD of imaging lens system group meets f/EPD ＜ 1.5.

Description

Imaging lens system group

Technical field

The application is related to a kind of imaging lens system group, more specifically, the application be related to a kind of large aperture including four lens, The imaging lens system group of high brightness.

Background technology

With the conventional photosensitive member such as photosensitive coupling element (CCD) or Complimentary Metal-Oxide semiconductor element (CMOS) The raising of part performance and the reduction of size, are proposed more for the high image quality of optical imaging system and miniaturization matched High requirement.

In order to meet the requirement of miniaturization, F-number Fno (total effective Jiao of camera lens that existing imaging lens system group is generally configured Entry pupil diameters away from/camera lens) 2.0 or more than 2.0, with realize minimize while with good optical property.But It is continuing to develop with portable type electronic products such as smart mobile phones, higher want is proposed to the imaging lens system group matched Ask, particularly when for insufficient light (such as overcast and rainy, dusk), hand shaking, this F-number Fno be 2.0 or 2.0 with On imaging lens system group can not meet the imaging requirements of higher order.

Especially, in infrared camera field, imaging lens system group also needs to have larger aperture while small size is ensured And higher brightness, it just can ensure that preferred application of the infrared lens in fields such as detection, identifications.

The content of the invention

This application provides be applicable to portable type electronic product, can at least solve or part solve it is of the prior art The imaging lens system group of at least one above-mentioned shortcoming.

On the one hand, this application provides a kind of imaging lens system group, the imaging lens system group along optical axis by thing side to image side sequentially Including：First lens, the second lens, the 3rd lens and the 4th lens.The thing side of first lens and the second lens can be convex Face；The image side surface of 3rd lens can be convex surface；The image side surface of 4th lens can be concave surface；First lens and the 3rd lens can have There is positive light coke；Second lens and the 4th lens are respectively provided with positive light coke or negative power；Total effective focal length f of imaging lens system group F/EPD ＜ 1.5 can be met with the Entry pupil diameters EPD of imaging lens system group.

In one embodiment, the image side surface of the second lens can be concave surface, the radius of curvature R 3 of the second lens thing side 0.5 ＜ R3/R4 ＜ 1 can be met with the radius of curvature R 4 of the second lens image side surface.

In one embodiment, the second lens can have positive light coke, and its effective focal length f2 is total with imaging lens system group Effective focal length f can meet 2 ＜ f2/f ＜ 8.

In one embodiment, total effective focal length f of the radius of curvature R 1 of the first lens thing side and imaging lens system group 0.5 ＜ R1/f ＜ 1.2 can be met.

In one embodiment, the spacing distance T12 and the first lens of the first lens and the second lens on optical axis On thing side to the axle of imaging lens system composition image planes T12/TTL ＜ 0.2 can be met apart from TTL.

In one embodiment, the first lens in the center thickness CT1 and the 3rd lens on optical axis on optical axis Heart thickness CT3 can meet 0.6 ＜ CT1/CT3 ＜ 1.3.

In one embodiment, the first lens in the center thickness CT1 on optical axis, the second lens in the center on optical axis Thickness CT2 and the 3rd lens can meet 0.4 ＜ CT1/ (CT2+CT3) ＜ 0.9 in the center thickness CT3 on optical axis.

In one embodiment, the first lens, the second lens, the 3rd lens and the 4th lens are on optical axis On the summation ∑ CT of heart thickness and the thing side of the first lens to the axle of imaging lens system composition image planes ∑ CT/ can be met apart from TTL TTL ＜ 0.6.

In one embodiment, at least one in the thing side and image side surface of the 4th lens can have at least one anti- Qu Dian.

In one embodiment, effective half bore DT42 of the 4th lens image side surface in imaging lens system composition image planes with having The half ImgH of effect pixel region diagonal line length can meet 0.7 ＜ DT42/ImgH ＜ 1.

In one embodiment, effective half bore DT11 of the first lens thing side in imaging lens system composition image planes with having The half ImgH of effect pixel region diagonal line length can meet 0.5 ＜ DT11/ImgH ＜ 1.

In one embodiment, the intersection point of the second lens thing side and optical axis is to effective half mouthful of the second lens thing side Footpath summit in the center thickness CT2 on optical axis can meet 0 ＜ SAG21/CT2 ＜ on optical axis apart from SAG21 and the second lens 0.7。

In one embodiment, imaging lens system group may also include the infrared band being arranged between the 4th lens and imaging surface Pass filter.

On the other hand, present invention also provides a kind of imaging lens system group, the imaging lens system group is along optical axis by thing side to image side Sequentially include：First lens, the second lens, the 3rd lens and the 4th lens.The thing side of first lens can be convex surface；3rd is saturating At least one in the thing side of mirror and image side surface can be convex surface；At least one in the thing side of 4th lens and image side surface can For concave surface；At least two in first lens, the 3rd lens and the 4th lens can have positive light coke；Second lens can have just Focal power, its effective focal length f2 and total effective focal length f of imaging lens system group can meet 2 ＜ f2/f ＜ 8.

In one embodiment, the first lens and the 3rd lens can have positive light coke.

In one embodiment, the image side surface of the 4th lens can be concave surface.

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

On the other hand, present invention also provides a kind of imaging lens system group, the imaging lens system group is along optical axis by thing side to image side Sequentially include：First lens, the second lens, the 3rd lens and the 4th lens.The thing side of first lens and the second lens For convex surface；The image side surface of 3rd lens can be convex surface；The image side surface of 4th lens can be concave surface；First lens and the 3rd lens are equal There can be positive light coke；Second lens and the 4th lens are respectively provided with positive light coke or negative power.Wherein, the first lens thing side Effective half bore DT11 and imaging lens system constitute the half ImgH of effective pixel area diagonal line length in image planes and can meet 0.5 ＜ DT11/ImgH ＜ 1.

On the other hand, present invention also provides a kind of imaging lens system group, the imaging lens system group is along optical axis by thing side to image side Sequentially include：First lens, the second lens, the 3rd lens and the 4th lens.The thing side of first lens and the second lens For convex surface；The image side surface of 3rd lens can be convex surface；The image side surface of 4th lens can be concave surface；First lens and the 3rd lens are equal There can be positive light coke；Second lens and the 4th lens are respectively provided with positive light coke or negative power.Wherein, the second lens thing side The radius of curvature R 4 of the lens image side surface of radius of curvature R 3 and second can meet 0.5 ＜ R3/R4 ＜ 1.

On the other hand, present invention also provides a kind of imaging lens system group, the imaging lens system group is along optical axis by thing side to image side Sequentially include：First lens, the second lens, the 3rd lens and the 4th lens.The thing side of first lens and the second lens For convex surface；The image side surface of 3rd lens can be convex surface；The image side surface of 4th lens can be concave surface；First lens and the 3rd lens are equal There can be positive light coke；Second lens and the 4th lens are respectively provided with positive light coke or negative power.Wherein, the 4th lens image side surface Effective half bore DT42 and imaging lens system constitute the half ImgH of effective pixel area diagonal line length in image planes and can meet 0.7 ＜ DT42/ImgH ＜ 1.

On the other hand, present invention also provides a kind of imaging lens system group, the imaging lens system group is along optical axis by thing side to image side Sequentially include：First lens, the second lens, the 3rd lens and the 4th lens.The thing side of first lens and the second lens For convex surface；The image side surface of 3rd lens can be convex surface；The image side surface of 4th lens can be concave surface；First lens and the 3rd lens are equal There can be positive light coke；Second lens and the 4th lens are respectively provided with positive light coke or negative power.Wherein, the second lens thing side With effective half bore summit of the intersection point of optical axis to the second lens thing side on optical axis apart from SAG21 and the second lens in light Center thickness CT2 on axle can meet 0 ＜ SAG21/CT2 ＜ 0.7.

On the other hand, present invention also provides a kind of imaging lens system group, the imaging lens system group is along optical axis by thing side to image side Sequentially include：First lens, the second lens, the 3rd lens and the 4th lens.The thing side of first lens and the second lens For convex surface；The image side surface of 3rd lens can be convex surface；The image side surface of 4th lens can be concave surface；First lens and the 3rd lens are equal There can be positive light coke；Second lens and the 4th lens are respectively provided with positive light coke or negative power.Imaging lens system group may also include It is arranged at the infrared band pass filter between the 4th lens and imaging surface.

The application employs such as four lens, by each power of lens of reasonable distribution, face type, each lens center Spacing etc. on axle between thickness and each lens so that lens group is while good image quality is realized, with ultra-thin, small At least one beneficial effect such as type, low sensitivity, large aperture, high brightness.

Brief description of the drawings

With reference to accompanying drawing, by the detailed description of following non-limiting embodiment, other features of the application, purpose and excellent Point will be apparent.In the accompanying drawings：

Fig. 1 shows the structural representation of the imaging lens system group according to the embodiment of the present application 1；

Fig. 2A to Fig. 2 E respectively illustrates chromatic curve on the axle of the imaging lens system group of embodiment 1, astigmatism curve, distortion song Line, ratio chromatism, curve and relative illumination curve；

Fig. 3 shows the structural representation of the imaging lens system group according to the embodiment of the present application 2；

Fig. 4 A to Fig. 4 E respectively illustrate chromatic curve on the axle of the imaging lens system group of embodiment 2, astigmatism curve, distortion song Line, ratio chromatism, curve and relative illumination curve；

Fig. 5 shows the structural representation of the imaging lens system group according to the embodiment of the present application 3；

Fig. 6 A to Fig. 6 E respectively illustrate chromatic curve on the axle of the imaging lens system group of embodiment 3, astigmatism curve, distortion song Line, ratio chromatism, curve and relative illumination curve；

Fig. 7 shows the structural representation of the imaging lens system group according to the embodiment of the present application 4；

Fig. 8 A to Fig. 8 E respectively illustrate chromatic curve on the axle of the imaging lens system group of embodiment 4, astigmatism curve, distortion song Line, ratio chromatism, curve and relative illumination curve；

Fig. 9 shows the structural representation of the imaging lens system group according to the embodiment of the present application 5；

Figure 10 A to Figure 10 E respectively illustrate chromatic curve on the axle of the imaging lens system group of embodiment 5, astigmatism curve, distortion Curve, ratio chromatism, curve and relative illumination curve；

Figure 11 shows the structural representation of the imaging lens system group according to the embodiment of the present application 6；

Figure 12 A to Figure 12 E respectively illustrate chromatic curve on the axle of the imaging lens system group of embodiment 6, astigmatism curve, distortion Curve, ratio chromatism, curve and relative illumination curve；

Figure 13 shows the structural representation of the imaging lens system group according to the embodiment of the present application 7；

Figure 14 A to Figure 14 E respectively illustrate chromatic curve on the axle of the imaging lens system group of embodiment 7, astigmatism curve, distortion Curve, ratio chromatism, curve and relative illumination curve.

Embodiment

In order to more fully understand the application, refer to the attached drawing is made into more detailed description to the various aspects of the application.Should Understand, these describe the description of illustrative embodiments simply to the application in detail, rather than limit the application in any way Scope.In the specification, identical reference numbers identical element.Stating "and/or" includes associated institute Any and all combinations of one or more of list of items.

It should be noted that in this manual, the statement of first, second, third, etc. is only used for a feature and another spy Levy and make a distinction, and do not indicate that any limitation to feature.Therefore, in the case of without departing substantially from teachings of the present application, hereinafter The first lens discussed are also known as the second lens or the 3rd lens.

In the accompanying drawings, for convenience of description, thickness, the size and dimension of lens are somewhat exaggerated.Specifically, accompanying drawing Shown in sphere or aspherical shape be illustrated by way of example.That is, sphere or aspherical shape is not limited to accompanying drawing In the sphere that shows or aspherical shape.Accompanying drawing is merely illustrative and simultaneously non-critical is drawn to scale.

Herein, near axis area refers to the region near optical axis.If lens surface is convex surface and does not define convex surface position When putting, then it represents that the lens surface is convex surface near axis area is less than；If lens surface is concave surface and does not define the concave surface position When, then it represents that the lens surface is concave surface near axis area is less than.It is referred to as thing side near the surface of object in each lens, It is referred to as image side surface near the surface of imaging surface in each lens.

It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory Represent there is stated feature, element and/or part when being used in bright book, but do not preclude the presence or addition of one or more Further feature, element, part and/or combinations thereof.In addition, ought the statement of such as " ... at least one " appear in institute When after the list of row feature, the whole listed feature of modification, rather than the individual component in modification list.In addition, working as description originally During the embodiment of application, represented " one or more embodiments of the application " using "available".Also, term " exemplary " It is intended to refer to example or illustration.

Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein be respectively provided with The application one skilled in the art's is generally understood that identical implication.It will also be appreciated that term is (such as in everyday words Term defined in allusion quotation) implication consistent with their implications in the context of correlation technique should be interpreted as having, and It will not explained with idealization or excessively formal sense, unless clearly such herein limit.

It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase Mutually combination.Describe the application in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The feature of the application, principle and other aspects are described in detail below.

Such as four lens with focal power are included according to the imaging lens system group of the application illustrative embodiments, i.e. First lens, the second lens, the 3rd lens and the 4th lens.This four lens are along optical axis from thing side to image side sequential.

Imaging lens system group may also include the photo-sensitive cell for being arranged at imaging surface, the effective pixel area diagonal of photo-sensitive cell Long half is ImgH.

First lens can have positive light coke, and it has larger refractive power, be conducive to shortening lens group entire length, subtract Lenslet group volume.The thing side of first lens can be convex surface, the radius of curvature R 1 of its thing side and always having for imaging lens system group 0.5 ＜ R1/f ＜ 1.2 can be met between effect focal length f, more specifically, R1 and f can further meet 0.58≤R1/f≤0.74.It is full The sufficient ＜ R1/f ＜ 1.2 of conditional 0.5, are conducive to shortening system overall length；Meanwhile, increase system light-inletting quantity is also helped to bring up to Reach the infrared luminous intensity of image planes.

Second lens have positive light coke or negative power, and its thing side can be convex surface, are conducive to balancing off-axis aberration, carry High imaging quality.Alternatively, the second lens can have positive light coke, its effective focal length f2 and total effective focal length of imaging lens system group 2 ＜ f2/f ＜ 8 can be met between f, more specifically, f2 and f can further meet 2.39≤f2/f≤7.19.Meet conditional 2 ＜ f2/f ＜ 8, are conducive to system focal power and aberration balancing, shorten system overall length.

Alternatively, the thing side of the second lens can be convex surface, and image side surface can be concave surface.The curvature of second lens thing side half 0.5 ＜ R3/R4 ＜ 1 can be met between the radius of curvature R 4 of footpath R3 and the second lens image side surface, more specifically, R3 and R4 are further 0.65≤R3/R4≤0.85 can be met.The ＜ R3/R4 ＜ 1 of conditional 0.5 are met, are conducive to scattered first power of lens, from And avoid causing the first lens surface overbending because focal power is excessively concentrated, manufacture difficulty is larger；Meanwhile, meet conditional 0.5 ＜ R3/R4 ＜ 1 are also beneficial to increase system light-inletting quantity.

3rd lens can have positive light coke, and its image side surface can be convex surface, such to be disposed with beneficial to the scattered of focal power, So as to reduce the angle of field rays and optical axis outside axle, and then improve the astigmatism problem of the outer visual field of axle.

4th lens have positive light coke or negative power, and its image side surface is concave surface, such to be disposed with beneficial to imaging surface It is close to thing side, so as to shorten system entire length, realize miniaturization.Alternatively, in the thing side and image side surface of the 4th lens At least one have at least one point of inflexion.The thing side of 4th lens or image side surface have at least one point of inflexion, can be with The outer visual field light path of adjustment axis, the surface incidence angle of the outer visual field of reduction axle, while the coma and astigmatism of the outer visual field of axle can be reduced.

In the application, the spacing distance the center thickness and each lens of each lens can be optimized, is taken the photograph with realizing As lens group preferably optical property.

First lens can expire in the center thickness CT1 and the 3rd lens on optical axis between the center thickness CT3 on optical axis 0.6 ＜ CT1/CT3 ＜ 1.3 of foot, more specifically, CT1 and CT3 can further meet 0.67≤CT1/CT3≤1.24.Meet condition The ＜ CT1/CT3 ＜ 1.3 of formula 0.6, are conducive to decentralized system focal power, to avoid focal power concentrations in the first lens or the 3rd On lens, and then avoid the tolerance caused due to the concentrations of focal power sensitive, and due to the concentrations of focal power And cause lens surface overbending, difficult forming the problems such as.

First lens are in the center thickness CT1 on optical axis, the second lens in center thickness CT2 and the 3rd lens on optical axis 0.4 ＜ CT1/ (CT2+CT3) ＜ 0.9 can be met between the center thickness CT3 on optical axis, more specifically, CT1, CT2 and CT3 0.43≤CT1/ (CT2+CT3)≤0.73 can further be met.Conditional 0.4 ＜ CT1/ (CT2+CT3) ＜ 0.9 is met, is helped Relatively reasonable space layout is obtained in the first lens, the second lens, the 3rd lens, so as to be conducive to the scattered of system focal power With the processing and forming of eyeglass.

All lens with focal power are (when imaging lens system group includes four lens with focal power in imaging lens system group When, all lens with focal power are to refer to the first lens, the second lens, the 3rd lens and the 4th lens) respectively on optical axis Center thickness summation ∑ CT and imaging lens system group optics total length TTL (that is, from the center of the first lens thing side into Distance on the axle of image planes) between can meet ∑ CT/TTL ＜ 0.6, more specifically, ∑ CT and TTL can further meet 0.46≤∑ CT/TTL≤0.51.Conditional ∑ CT/TTL ＜ 0.6 are met, are conducive to shortening the entire length of lens group.Meanwhile, increase each Spacing distance between mirror is also beneficial to the tolerance sensitivity of reduction system, the quality of lifting lens group batch production with it is consistent Property.

The optics total length TTL of the spacing distance T12 of first lens and the second lens on optical axis and imaging lens system group it Between can meet T12/TTL ＜ 0.2, more specifically, T12 and TTL can further meet 0.06≤T12/TTL≤0.16.Meet bar Part formula T12/TTL ＜ 0.2, are conducive to compressing the effective aperture of the second lens, and reducing glass packet size realizes small size performance.

Effective half bore DT11 of first lens thing side and effective pixel area diagonal line length on imaging surface half 0.5 ＜ DT11/ImgH ＜ 1 can be met between ImgH, more specifically, DT11 and ImgH can further meet 0.52≤DT11/ ImgH≤0.63.The ＜ DT11/ImgH ＜ 1 of conditional 0.5 are met, are conducive to shortening the entire length of lens group；At the same time it can also So that system has larger light-inletting quantity, photo-sensitive cell output signal-noise ratio is improved.

Effective half bore DT42 of 4th lens image side surface and effective pixel area diagonal line length on imaging surface half 0.7 ＜ DT42/ImgH ＜ 1 can be met between ImgH, more specifically, DT42 and ImgH can further meet 0.83≤DT42/ ImgH≤0.99.Meeting the ＜ DT42/ImgH ＜ 1 of conditional 0.7 can avoid because excessively steep when off-axis ray is by four lens Tolerance that is high and steep and producing is sensitive；Meanwhile, it is such to arrange the miniaturization for also helping lens group.

The thing side of second lens and the intersection point of optical axis are to the axle between effective half bore summit of the second lens thing side On 0 ＜ SAG21/CT2 ＜ 0.7 can be met between the center thickness CT2 on optical axis apart from SAG21 and the second lens, more specifically Ground, SAG21 and CT2 can further meet 0.15≤SAG21/CT2≤0.60.The ＜ SAG21/CT2 ＜ 0.7 of conditional 0 are met, are had Beneficial to the effective aperture for reducing the second lens, so as to be conducive to the processing and shaping of eyeglass.

F/EPD ＜ 1.5 can be met between total effective focal length f of imaging lens system group and the Entry pupil diameters EPD of imaging lens system group, More specifically, f and EPD can further meet 1.04≤f/EPD≤1.29.Conditional f/EPD ＜ 1.5 are met, can be effectively The energy density in image planes is improved, so as to be conducive to improving image space sensor output signal-noise ratio.

Alternatively, can be set between the 4th lens and imaging surface has infrared band pass filter, infrared for being filtered through Light, the problems such as eliminating aberration, the image blur that non-infrared light is caused eliminate the signal interference that non-infrared light is brought.

In the exemplary embodiment, the imaging lens system group of the application may also include at least one diaphragm.Diaphragm can basis Need any position being arranged between thing side and image side.By the appropriate selection to stop position, can effectively correct with The relevant aberration of diaphragm (for example, coma, astigmatism, distortion and axial chromatic aberration), to improve the image quality of camera lens.Alternatively, light Door screen may be disposed between thing side and the first lens.Alternatively, diaphragm may be disposed between the first lens and the second lens.

Alternatively, above-mentioned imaging lens system group may also include the protection glass for protecting the photo-sensitive cell being located on imaging surface Glass.

Multi-disc eyeglass, such as described above four can be used according to the imaging lens system group of the above-mentioned embodiment of the application Piece.Pass through spacing on the axle between each power of lens of reasonable distribution, face type, the center thickness of each lens and each lens Deng can effectively reduce the volume of lens group, reduce the susceptibility of lens group and improve the machinability of lens group so that shooting Lens group is more beneficial for producing and processing and being applicable to portable type electronic product.Meanwhile, pass through the imaging lens system of above-mentioned configuration Group, also with the beneficial effect such as ultra-thin, large aperture, high brightness, high image quality.

In presently filed embodiment, at least one in the minute surface of each lens is aspherical mirror.Non-spherical lens The characteristics of be：From lens centre to lens perimeter, curvature is consecutive variations.It is constant with having from lens centre to lens perimeter The spherical lens of curvature is different, and non-spherical lens has more preferably radius of curvature characteristic, and aberration and improvement picture are distorted with improving Dissipate the advantage of aberration.After non-spherical lens, the aberration occurred when imaging can be eliminated as much as possible, so as to improve Image quality.In addition, the use of non-spherical lens can also efficiently reduce the lens number in optical system.

However, it will be understood by those of skill in the art that without departing from this application claims technical scheme situation Under, the lens numbers for constituting imaging lens system group can be changed, to obtain each result and the advantage described in this specification.For example, Although being described in embodiments by taking four lens as an example, the imaging lens system group is not limited to include four lens. If desired, the imaging lens system group may also include the lens of other quantity.

The specific embodiment for the imaging lens system group for being applicable to above-mentioned embodiment is further described with reference to the accompanying drawings.

Embodiment 1

The imaging lens system group according to the embodiment of the present application 1 is described referring to Fig. 1 to Fig. 2 E.Fig. 1 is shown according to this Shen Please embodiment 1 imaging lens system group structural representation.

As shown in figure 1, imaging lens system group sequentially includes the first lens L1, the second lens by thing side along optical axis into image side L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being arranged at imaging surface S11 Part.

First lens L1 has positive light coke, and its thing side S1 is convex surface, and image side surface S2 is concave surface, and the first lens L1 Thing side S1 and image side surface S2 is aspherical.

Second lens L2 has positive light coke, and its thing side S3 is convex surface, and image side surface S4 is concave surface, and the second lens L2 Thing side S3 and image side surface S4 is aspherical.

3rd lens L3 has positive light coke, and its thing side S5 is concave surface, and image side surface S6 is convex surface, and the 3rd lens L3 Thing side S5 and image side surface S6 is aspherical.

4th lens L4 has positive light coke, and its thing side S7 is convex surface, and image side surface S8 is concave surface, and the 4th lens L4 Thing side S7 and image side surface S8 is aspherical.

Alternatively, imaging lens system group may also include the optical filter L5 with thing side S9 and image side surface S10.Optical filter L5 can For infrared band pass filter.Light from object sequentially through each surface S1 to S10 and is ultimately imaged on imaging surface S11.

Alternatively, the diaphragm STO of confine optical beam can be provided between thing side and the first lens L1, it is saturating to lift shooting The image quality of microscope group.

Table 1 shows surface type, radius of curvature, thickness, material and the circle of each lens of the imaging lens system group of embodiment 1 Coefficient is bored, wherein, the unit of radius of curvature and thickness is millimeter (mm).

Table 1

It can be obtained by table 1, the second lens L2 thing side S3 lens L2 of radius of curvature R 3 and second image side surface S4 song R3/R4=0.73 is met between rate radius R4；First lens L1 is in the center thickness CT1 and the 3rd lens L3 on optical axis in optical axis On center thickness CT3 between meet CT1/CT3=0.82；First lens L1 is in the center thickness CT1 on optical axis, the second lens L2 in the center thickness CT2 and the 3rd lens L3 on optical axis in the center thickness CT3 on optical axis meet CT1/ (CT2+CT3)= 0.52。

In embodiment 1, each lens can use non-spherical lens, and each aspherical face type x is limited by below equation：

Wherein, x be it is aspherical along optical axis direction height be h position when, away from aspheric vertex of surface apart from rise；C is Aspherical paraxial curvature, c=1/R (that is, paraxial curvature c is the mean curvature radius R of upper table 1 inverse)；K be circular cone coefficient ( Provided in table 1)；Ai is the correction factor of aspherical i-th-th ranks.Table 2 below is given available for each aspherical in embodiment 1 Minute surface S1-S8 high order term coefficient A₄、A₆、A₈、A₁₀、A₁₂、A₁₄And A₁₆。

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-2.6901E-02

1.3274E-02

-2.1706E-02

2.5702E-02

-1.9823E-02

4.9245E-03

-1.0617E-04

S2

-4.2572E-02

-3.0394E-02

1.0206E-02

1.1631E-02

-1.5978E-02

4.9360E-03

1.8444E-04

S3

-1.8404E-01

-2.2932E-02

-1.9112E-01

1.8354E-01

-4.8139E-02

1.0335E-03

4.3675E-04

S4

2.3637E-02

-1.3993E-01

-1.5439E-01

2.7901E-01

-1.6071E-01

3.9760E-02

-3.2453E-03

S5

1.8305E-01

-3.5807E-01

4.7080E-01

-4.3425E-01

2.4972E-01

-8.9144E-02

1.4350E-02

S6

-4.8618E-01

1.2078E+00

-1.8554E+00

1.7025E+00

-9.0795E-01

2.5477E-01

-2.8524E-02

S7

-3.3394E-02

-5.2685E-02

4.0756E-02

-1.1570E-02

1.6497E-03

-1.1853E-04

3.2993E-06

S8

-1.3131E-01

7.0132E-02

-3.0786E-02

8.3243E-03

-1.2222E-03

8.6139E-05

-2.3107E-06

Table 2

Table 3 below provides total effective focal length f of imaging lens system group in embodiment 1, the effective focal length f1 to f4 of each lens, shooting The half ImgH of effective pixel area diagonal line length and the optics total length of imaging lens system group on the imaging surface S11 of lens group TTL (that is, from distance on the first lens L1 thing side S1 center to imaging surface S11 axle).

Table 3

It can be obtained by upper table 1 and table 3, between the second lens L2 effective focal length f2 and total effective focal length f of imaging lens system group Meet f2/f=2.56；Between first lens L1 thing side S1 radius of curvature R 1 and total effective focal length f of imaging lens system group Meet R1/f=0.74；The spacing distance T12 of first lens L1 and the second lens L2 on optical axis and the optics of imaging lens system group T12/TTL=0.06 is met between total length TTL；L4 points of first lens L1, the second lens L2, the 3rd lens L3 and the 4th lens Not meet Σ CT/TTL=between the summation Σ CT of the center thickness on optical axis and the optics total length TTL of imaging lens system group 0.48。

In embodiment 1, met between total effective focal length f of imaging lens system group and the Entry pupil diameters EPD of imaging lens system group F/EPD=1.12；First lens L1 thing side S1 effective half bore DT11 with it is effective on the imaging surface S11 of imaging lens system group DT11/ImgH=0.61 is met between the half ImgH of pixel region diagonal line length；4th lens L4 image side surface S8's is effective Met on the half bore DT42 and imaging surface S11 of imaging lens system group between the half ImgH of effective pixel area diagonal line length DT42/ImgH=0.99；Second lens L2 thing side S3 and the intersection point of optical axis to the second lens L2 thing side S3 it is effective On axle between half bore summit SAG21/ is met apart from SAG21 and the second lens L2 between the center thickness CT2 on optical axis CT2=0.45.

Fig. 2A shows chromatic curve on the axle of the imaging lens system group of embodiment 1, its represent different wave length light via Converging focal point after lens group deviates.Fig. 2 B show the astigmatism curve of the imaging lens system group of embodiment 1, and it represents meridianal image surface Bending and sagittal image surface bending.Fig. 2 C show the distortion curve of the imaging lens system group of embodiment 1, and it represents different visual angles situation Under distortion sizes values.Fig. 2 D show the ratio chromatism, curve of the imaging lens system group of embodiment 1, and it represents light via lens The deviation of different image heights after group on imaging surface.Fig. 2 E show the relative illumination curve of the imaging lens system group of embodiment 1, It represents the relative illumination corresponding to different image heights on imaging surface.Understood according to Fig. 2A to Fig. 2 E, the shooting given by embodiment 1 Lens group can realize good image quality.

Embodiment 2

The imaging lens system group according to the embodiment of the present application 2 is described referring to Fig. 3 to Fig. 4 E.In the present embodiment and following In embodiment, for brevity, by clipped description similar to Example 1.Fig. 3 is shown according to the embodiment of the present application 2 Imaging lens system group structural representation.

As shown in figure 3, imaging lens system group sequentially includes the first lens L1, the second lens by thing side along optical axis into image side L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being arranged at imaging surface S11 Part.

4th lens L4 has negative power, and its thing side S7 is convex surface, and image side surface S8 is concave surface, and the 4th lens L4 Thing side S7 and image side surface S8 is aspherical.

Alternatively, the diaphragm STO of confine optical beam can be provided between the first lens L1 and the second lens L2, to be lifted The image quality of imaging lens system group.

Table 4 shows surface type, radius of curvature, thickness, material and the circle of each lens of the imaging lens system group of embodiment 2 Coefficient is bored, wherein, the unit of radius of curvature and thickness is millimeter (mm).Table 5 is shown available for each aspherical in embodiment 2 The high order term coefficient of minute surface, wherein, the formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.Table 6 is shown Total effective focal length f, the effective focal length f1 to f4 of each lens, the imaging surface of imaging lens system group of imaging lens system group in embodiment 2 The half ImgH of the upper effective pixel area diagonal line length and optics total length TTL of imaging lens system group.

Table 4

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-2.0938E-02

7.1645E-03

-1.2217E-02

1.5627E-02

-1.8137E-02

8.1936E-03

-1.5442E-03

S2

-3.7195E-02

-2.5868E-03

-2.0882E-02

8.3370E-03

6.8312E-03

-7.9328E-03

2.2755E-03

S3

-1.7076E-01

-8.0125E-02

-1.5436E-01

1.9385E-01

-7.2746E-02

-2.3434E-02

2.2857E-02

S4

-6.5556E-03

-1.2073E-01

-1.5830E-01

3.0988E-01

-1.9283E-01

3.1055E-02

6.8774E-03

S5

1.2179E-01

-3.3096E-01

4.7612E-01

-4.4101E-01

2.3203E-01

-7.9559E-02

1.5354E-02

S6

-6.3654E-01

1.5927E+00

-2.7276E+00

2.8992E+00

-1.8471E+00

6.3927E-01

-9.0844E-02

S7

-3.9350E-02

-1.9082E-03

1.0826E-02

-3.9619E-03

6.4006E-04

-4.8389E-05

1.3687E-06

S8

-8.5153E-02

3.7287E-02

-1.2320E-02

1.9163E-03

-1.0815E-04

0.0000E+00

Table 5

Table 6

Fig. 4 A show chromatic curve on the axle of the imaging lens system group of embodiment 2, its represent different wave length light via Converging focal point after lens group deviates.Fig. 4 B show the astigmatism curve of the imaging lens system group of embodiment 2, and it represents meridianal image surface Bending and sagittal image surface bending.Fig. 4 C show the distortion curve of the imaging lens system group of embodiment 2, and it represents different visual angles situation Under distortion sizes values.Fig. 4 D show the ratio chromatism, curve of the imaging lens system group of embodiment 2, and it represents light via lens The deviation of different image heights after group on imaging surface.Fig. 4 E show the relative illumination curve of the imaging lens system group of embodiment 2, It represents the relative illumination corresponding to different image heights on imaging surface.Understood according to Fig. 4 A to Fig. 4 E, the shooting given by embodiment 2 Lens group can realize good image quality.

Embodiment 3

The imaging lens system group according to the embodiment of the present application 3 is described referring to Fig. 5 to Fig. 6 E.Fig. 5 is shown according to this Apply for the structural representation of the imaging lens system group of embodiment 3.

As shown in figure 5, imaging lens system group sequentially includes the first lens L1, the second lens by thing side along optical axis into image side L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being arranged at imaging surface S11 Part.

3rd lens L3 has positive light coke, and its thing side S5 is convex surface, and image side surface S6 is convex surface, and the 3rd lens L3 Thing side S5 and image side surface S6 is aspherical.

Table 7 shows surface type, radius of curvature, thickness, material and the circle of each lens of the imaging lens system group of embodiment 3 Coefficient is bored, wherein, the unit of radius of curvature and thickness is millimeter (mm).Table 8 is shown available for each aspherical in embodiment 3 The high order term coefficient of minute surface, wherein, the formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.Table 9 is shown Total effective focal length f, the effective focal length f1 to f4 of each lens, the imaging surface of imaging lens system group of imaging lens system group in embodiment 3 The half ImgH of the upper effective pixel area diagonal line length and optics total length TTL of imaging lens system group.

Table 7

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-2.4003E-02

-7.5346E-03

-6.7209E-03

6.0803E-03

-2.1473E-02

1.2364E-02

-1.7349E-03

S2

-4.0073E-02

-2.3053E-02

-2.7752E-02

1.6195E-02

3.3039E-03

-2.7646E-03

1.1259E-03

S3

-1.1578E-01

-5.0949E-03

-1.9019E-01

1.5170E-01

-7.7018E-02

1.4587E-02

2.2859E-02

S4

1.3480E-02

-1.3969E-01

-9.4474E-02

1.8379E-01

-2.4467E-01

1.0573E-01

6.9279E-03

S5

3.6031E-02

-1.6504E-01

2.2961E-01

-1.5991E-01

8.5202E-02

-7.9465E-02

1.5351E-02

S6

-2.2493E-01

6.6619E-01

-1.2917E+00

1.5860E+00

-1.0110E+00

3.0611E-01

-3.4677E-02

S7

-6.3749E-01

5.5138E-01

-4.7617E-01

4.1691E-01

-2.1333E-01

5.3312E-02

-5.1217E-03

S8

-3.7089E-01

3.4114E-01

-2.2096E-01

8.8733E-02

-1.9355E-02

1.5132E-03

5.8720E-05

Table 8

Table 9

Fig. 6 A show chromatic curve on the axle of the imaging lens system group of embodiment 3, its represent different wave length light via Converging focal point after lens group deviates.Fig. 6 B show the astigmatism curve of the imaging lens system group of embodiment 3, and it represents meridianal image surface Bending and sagittal image surface bending.Fig. 6 C show the distortion curve of the imaging lens system group of embodiment 3, and it represents different visual angles situation Under distortion sizes values.Fig. 6 D show the ratio chromatism, curve of the imaging lens system group of embodiment 3, and it represents light via lens The deviation of different image heights after group on imaging surface.Fig. 6 E show the relative illumination curve of the imaging lens system group of embodiment 3, It represents the relative illumination corresponding to different image heights on imaging surface.Understood according to Fig. 6 A to Fig. 6 E, the shooting given by embodiment 3 Lens group can realize good image quality.

Embodiment 4

The imaging lens system group according to the embodiment of the present application 4 is described referring to Fig. 7 to Fig. 8 E.Fig. 7 is shown according to this Apply for the structural representation of the imaging lens system group of embodiment 4.

As shown in fig. 7, imaging lens system group sequentially includes the first lens L1, the second lens by thing side along optical axis into image side L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being arranged at imaging surface S11 Part.

4th lens L4 has negative power, and its thing side S7 is concave surface, and image side surface S8 is concave surface, and the 4th lens L4 Thing side S7 and image side surface S8 is aspherical.

Table 10 show the surface types of each lens of the imaging lens system group of embodiment 4, radius of curvature, thickness, material and Circular cone coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).Table 11 is shown available for each non-in embodiment 4 The high order term coefficient of spherical mirror surface, wherein, the formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.Table 12 Show total effective focal length f of imaging lens system group in embodiment 4, the effective focal length f1 to f4 of each lens, imaging lens system group into The half ImgH of the effective pixel area diagonal line length and optics total length TTL of imaging lens system group in image planes.

Table 10

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-2.0810E-02

1.0243E-03

-1.6939E-02

1.0342E-02

-1.9783E-02

8.2773E-03

-6.2554E-04

S2

-3.2809E-02

-2.7210E-02

-3.3706E-02

1.6401E-02

4.4599E-03

-2.2500E-03

3.7039E-04

S3

-1.0678E-01

-1.8130E-02

-2.2494E-01

1.7703E-01

-5.5672E-02

1.4802E-03

2.2862E-02

S4

5.7671E-03

-7.3940E-02

-2.2723E-01

2.0698E-01

-1.4686E-01

6.1850E-02

6.9281E-03

S5

9.8829E-02

-2.1919E-01

3.0444E-01

-3.0595E-01

1.4302E-01

-7.9465E-02

1.5354E-02

S6

4.3080E-01

-1.3389E+00

2.6886E+00

-3.2470E+00

2.3066E+00

-8.7430E-01

1.3442E-01

S7

-6.1033E-02

-2.2569E-01

8.9914E-02

1.5523E-01

-1.3379E-01

3.8682E-02

-3.9081E-03

S8

-1.2317E-01

-1.4640E-02

3.8021E-02

-1.7027E-02

2.4742E-03

0.0000E+00

Table 11

Table 12

Fig. 8 A show chromatic curve on the axle of the imaging lens system group of embodiment 4, its represent different wave length light via Converging focal point after lens group deviates.Fig. 8 B show the astigmatism curve of the imaging lens system group of embodiment 4, and it represents meridianal image surface Bending and sagittal image surface bending.Fig. 8 C show the distortion curve of the imaging lens system group of embodiment 4, and it represents different visual angles situation Under distortion sizes values.Fig. 8 D show the ratio chromatism, curve of the imaging lens system group of embodiment 4, and it represents light via lens The deviation of different image heights after group on imaging surface.Fig. 8 E show the relative illumination curve of the imaging lens system group of embodiment 4, It represents the relative illumination corresponding to different image heights on imaging surface.Understood according to Fig. 8 A to Fig. 8 E, the shooting given by embodiment 4 Lens group can realize good image quality.

Embodiment 5

The imaging lens system group according to the embodiment of the present application 5 is described referring to Fig. 9 to Figure 10 E.Fig. 9 is shown according to this Apply for the structural representation of the imaging lens system group of embodiment 5.

As shown in figure 9, imaging lens system group sequentially includes the first lens L1, the second lens by thing side along optical axis into image side L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being arranged at imaging surface S11 Part.

Table 13 show the surface types of each lens of the imaging lens system group of embodiment 5, radius of curvature, thickness, material and Circular cone coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).Table 14 is shown available for each non-in embodiment 5 The high order term coefficient of spherical mirror surface, wherein, the formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.Table 15 Show total effective focal length f of imaging lens system group in embodiment 5, the effective focal length f1 to f4 of each lens, imaging lens system group into The half ImgH of the effective pixel area diagonal line length and optics total length TTL of imaging lens system group in image planes.

Table 13

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-2.3250E-02

1.2893E-02

-2.4007E-02

2.7438E-02

-1.7763E-02

4.3274E-03

-2.7176E-04

S2

-3.4032E-02

-2.8793E-02

6.9575E-03

1.3506E-02

-1.4905E-02

4.8235E-03

-2.7185E-04

S3

-1.4642E-01

-7.2124E-03

-1.9899E-01

1.8037E-01

-4.8210E-02

1.2564E-03

7.9764E-04

S4

4.1497E-02

-1.2358E-01

-1.7354E-01

2.7747E-01

-1.5679E-01

4.1506E-02

-4.2489E-03

S5

2.0810E-01

-3.4503E-01

4.5713E-01

-4.2868E-01

2.5249E-01

-8.7983E-02

1.3033E-02

S6

-5.2762E-01

1.2566E+00

-1.7746E+00

1.5308E+00

-7.7402E-01

2.0696E-01

-2.2267E-02

S7

2.5820E-03

-6.0664E-02

3.6590E-02

-9.2093E-03

1.1785E-03

-7.5594E-05

1.8882E-06

S8

-1.6514E-01

8.7381E-02

-3.3765E-02

7.9195E-03

-1.0446E-03

6.8360E-05

-1.7249E-06

Table 14

Table 15

Figure 10 A show chromatic curve on the axle of the imaging lens system group of embodiment 5, its represent different wave length light via Converging focal point after lens group deviates.Figure 10 B show the astigmatism curve of the imaging lens system group of embodiment 5, and it represents meridian picture Face is bent and sagittal image surface bending.Figure 10 C show the distortion curve of the imaging lens system group of embodiment 5, and it represents different visual angles In the case of distortion sizes values.Figure 10 D show the ratio chromatism, curve of the imaging lens system group of embodiment 5, and it represents light warp The deviation of different image heights after lens group on imaging surface.Figure 10 E show contrasting for the imaging lens system group of embodiment 5 Write music line, it represents the relative illumination corresponding to different image heights on imaging surface.Understood according to Figure 10 A to Figure 10 E, the institute of embodiment 5 The imaging lens system group provided can realize good image quality.

Embodiment 6

The imaging lens system group according to the embodiment of the present application 6 is described referring to Figure 11 to Figure 12 E.Figure 11 shows basis The structural representation of the imaging lens system group of the embodiment of the present application 6.

As shown in figure 11, imaging lens system group sequentially includes the first lens L1, the second lens by thing side along optical axis into image side L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being arranged at imaging surface S11 Part.

Table 16 show the surface types of each lens of the imaging lens system group of embodiment 6, radius of curvature, thickness, material and Circular cone coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).Table 17 is shown available for each non-in embodiment 6 The high order term coefficient of spherical mirror surface, wherein, the formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.Table 18 Show total effective focal length f of imaging lens system group in embodiment 6, the effective focal length f1 to f4 of each lens, imaging lens system group into The half ImgH of the effective pixel area diagonal line length and optics total length TTL of imaging lens system group in image planes.

Table 16

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-2.3376E-02

1.4573E-02

-2.2897E-02

2.4319E-02

-2.0369E-02

4.9972E-03

-1.1594E-03

S2

-4.4366E-02

-3.2311E-02

6.8656E-03

7.2142E-03

-1.8982E-02

4.2358E-03

2.6175E-03

S3

-2.0009E-01

-2.6864E-02

-1.9719E-01

1.8329E-01

-4.5768E-02

3.0644E-03

2.6472E-03

S4

-1.0260E-02

-1.2812E-01

-1.4368E-01

2.7669E-01

-1.6475E-01

3.8160E-02

-9.7948E-04

S5

1.5229E-01

-3.5551E-01

4.6689E-01

-4.3870E-01

2.4806E-01

-8.9129E-02

1.5086E-02

S6

-4.0351E-01

9.4437E-01

-1.6404E+00

1.7659E+00

-1.1170E+00

3.7355E-01

-4.9949E-02

S7

-2.0898E-01

6.1476E-02

1.8665E-02

-1.3512E-02

3.0181E-03

-3.0840E-04

1.1550E-05

S8

-1.7771E-01

1.0531E-01

-5.0484E-02

1.5890E-02

-2.7568E-03

2.2769E-04

-7.1017E-06

Table 17

Table 18

Figure 12 A show chromatic curve on the axle of the imaging lens system group of embodiment 6, its represent different wave length light via Converging focal point after lens group deviates.Figure 12 B show the astigmatism curve of the imaging lens system group of embodiment 6, and it represents meridian picture Face is bent and sagittal image surface bending.Figure 12 C show the distortion curve of the imaging lens system group of embodiment 6, and it represents different visual angles In the case of distortion sizes values.Figure 12 D show the ratio chromatism, curve of the imaging lens system group of embodiment 6, and it represents light warp The deviation of different image heights after lens group on imaging surface.Figure 12 E show contrasting for the imaging lens system group of embodiment 6 Write music line, it represents the relative illumination corresponding to different image heights on imaging surface.Understood according to Figure 12 A to Figure 12 E, the institute of embodiment 6 The imaging lens system group provided can realize good image quality.

Embodiment 7

The imaging lens system group according to the embodiment of the present application 7 is described referring to Figure 13 to Figure 14 E.Figure 13 shows basis The structural representation of the imaging lens system group of the embodiment of the present application 7.

As shown in figure 13, imaging lens system group sequentially includes the first lens L1, the second lens by thing side along optical axis into image side L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being arranged at imaging surface S11 Part.

Table 19 show the surface types of each lens of the imaging lens system group of embodiment 7, radius of curvature, thickness, material and Circular cone coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).Table 20 is shown available for each non-in embodiment 7 The high order term coefficient of spherical mirror surface, wherein, the formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.Table 21 Show total effective focal length f of imaging lens system group in embodiment 7, the effective focal length f1 to f4 of each lens, imaging lens system group into The half ImgH of the effective pixel area diagonal line length and optics total length TTL of imaging lens system group in image planes.

Table 19

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-1.0082E-02

-1.3226E-02

2.9056E-03

6.9244E-03

-3.1481E-02

2.1629E-02

-5.1705E-03

S2

-2.4608E-02

2.0413E-03

-2.4382E-02

-1.4647E-02

-1.0636E-02

5.0419E-02

-2.5124E-02

S3

2.3108E-02

-4.9641E-02

-2.4065E-01

2.4119E-01

1.8248E-02

-6.8138E-02

2.2980E-02

S4

-7.2907E-02

-3.6797E-02

-1.1042E-01

1.7116E-01

-2.1745E-01

1.2981E-01

1.4286E-02

S5

7.8851E-02

-1.0625E-01

1.0834E-01

-2.3351E-01

1.7066E-01

-7.9201E-02

1.5354E-02

S6

-8.7334E-02

1.2519E-01

-5.9275E-02

8.5334E-03

-5.6340E-04

1.7758E-05

-2.1705E-07

S7

-1.6032E-02

-6.5518E-01

8.5780E-01

-4.8134E-01

1.4193E-01

-2.1562E-02

1.3338E-03

S8

-2.0882E-01

4.6067E-02

3.2161E-02

-2.3506E-02

3.8837E-03

0.0000E+00

Table 20

Table 21

Figure 14 A show chromatic curve on the axle of the imaging lens system group of embodiment 7, its represent different wave length light via Converging focal point after lens group deviates.Figure 14 B show the astigmatism curve of the imaging lens system group of embodiment 7, and it represents meridian picture Face is bent and sagittal image surface bending.Figure 14 C show the distortion curve of the imaging lens system group of embodiment 7, and it represents different visual angles In the case of distortion sizes values.Figure 14 D show the ratio chromatism, curve of the imaging lens system group of embodiment 7, and it represents light warp The deviation of different image heights after lens group on imaging surface.Figure 14 E show contrasting for the imaging lens system group of embodiment 7 Write music line, it represents the relative illumination corresponding to different image heights on imaging surface.Understood according to Figure 14 A to Figure 14 E, the institute of embodiment 7 The imaging lens system group provided can realize good image quality.

To sum up, embodiment 1 to embodiment 7 meets the relation shown in table 22 below respectively.

Conditional embodiment	1	2	3	4	5	6	7
								f/EPD	1.12	1.20	1.24	1.24	1.04	1.29	1.24
R3/R4	0.73	0.85	0.66	0.65	0.69	0.75	0.77
								f2/f	2.56	4.69	2.85	2.74	2.39	2.98	7.19
R1/f	0.74	0.71	0.62	0.58	0.74	0.67	0.62
								T12/TTL	0.06	0.08	0.11	0.11	0.06	0.06	0.16
CT1/CT3	0.82	0.80	1.10	1.22	1.12	0.67	1.24
								CT1/(CT2+CT3)	0.52	0.53	0.62	0.67	0.65	0.43	0.73
∑CT/TTL	0.48	0.51	0.46	0.46	0.50	0.47	0.48
								DT11/ImgH	0.61	0.60	0.57	0.57	0.63	0.52	0.57
DT42/ImgH	0.99	0.95	0.84	0.83	0.99	0.99	0.84
								SAG21/CT2	0.45	0.30	0.60	0.58	0.43	0.15	0.17

Table 22

The application also provides a kind of camera device, and its electronics photo-sensitive cell can be photosensitive coupling element (CCD) or complementation Property matal-oxide semiconductor element (CMOS).Camera device can be such as digital camera independent picture pick-up device or It is integrated in the photographing module on the mobile electronic devices such as mobile phone.The camera device is equipped with imaging lens system described above Group.

Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.People in the art Member should be appreciated that invention scope involved in the application, however it is not limited to the technology of the particular combination of above-mentioned technical characteristic Scheme, while should also cover in the case where not departing from the inventive concept, is carried out by above-mentioned technical characteristic or its equivalent feature Other technical schemes formed by any combination.Such as features described above has similar work(with (but not limited to) disclosed herein The technical characteristic of energy carries out technical scheme formed by replacement mutually.

Claims

1. imaging lens system group, is sequentially included along optical axis by thing side to image side：First lens, the second lens, the 3rd lens and the 4th Lens, it is characterised in that

The thing side of first lens and second lens is convex surface；

The image side surface of 3rd lens is convex surface；

The image side surface of 4th lens is concave surface；

First lens and the 3rd lens are respectively provided with positive light coke；

Second lens and the 4th lens are respectively provided with positive light coke or negative power；

Total effective focal length f of the imaging lens system group and Entry pupil diameters EPD of the imaging lens system group meets f/EPD ＜ 1.5.

2. imaging lens system group according to claim 1, it is characterised in that the image side surface of second lens is concave surface, institute State the radius of curvature R 3 of the second lens thing side and meet 0.5 ＜ R3/R4 ＜ with the radius of curvature R 4 of the second lens image side surface 1。

3. imaging lens system group according to claim 1 or 2, it is characterised in that second lens have positive light coke, its Effective focal length f2 and total effective focal length f of the imaging lens system group meet 2 ＜ f2/f ＜ 8.

4. imaging lens system group according to claim 1, it is characterised in that the radius of curvature R 1 of the first lens thing side 0.5 ＜ R1/f ＜ 1.2 are met with total effective focal length f of the imaging lens system group.

5. the imaging lens system group according to any one of claim 1,2 or 4, it is characterised in that first lens and institute Thing side to the imaging lens system for stating spacing distance T12 of second lens on the optical axis and first lens constitutes picture On the axle in face T12/TTL ＜ 0.2 are met apart from TTL.

6. imaging lens system group according to claim 1, it is characterised in that first lens are in the center on the optical axis Thickness CT1 meets 0.6 ＜ CT1/CT3 ＜ 1.3 with the 3rd lens in the center thickness CT3 on the optical axis.

7. imaging lens system group according to claim 1, it is characterised in that first lens are in the center on the optical axis Thickness CT1, second lens are in the center thickness CT2 on the optical axis and the 3rd lens on the optical axis Heart thickness CT3 meets 0.4 ＜ CT1/ (CT2+CT3) ＜ 0.9.

8. the imaging lens system group according to any one of claim 1,6 or 7, it is characterised in that first lens, described Second lens, the 3rd lens and the 4th lens respectively at the center thickness on the optical axis summation ∑ CT with it is described On the thing side of first lens to the axle of the imaging lens system composition image planes ∑ CT/TTL ＜ 0.6 are met apart from TTL.

9. imaging lens system group according to claim 1, it is characterised in that effective half bore of the first lens thing side The half ImgH that DT11 constitutes effective pixel area diagonal line length in image planes with the imaging lens system meets 0.5 ＜ DT11/ImgH ＜ 1.

10. imaging lens system group according to claim 1, it is characterised in that the thing side of the 4th lens and image side surface In at least one have at least one point of inflexion.

11. the imaging lens system group according to claim 1 or 10, it is characterised in that the 4th lens image side surface it is effective The half ImgH that half bore DT42 constitutes effective pixel area diagonal line length in image planes with the imaging lens system meets 0.7 ＜ DT42/ImgH ＜ 1.

12. imaging lens system group according to claim 1 or 2, it is characterised in that the second lens thing side and the light The intersection point of axle to the second lens thing side effective half bore summit on the optical axis apart from SAG21 and described second Lens meet 0 ＜ SAG21/CT2 ＜ 0.7 in the center thickness CT2 on the optical axis.

13. imaging lens system group according to claim 1, it is characterised in that the imaging lens system group also includes being arranged at institute State the infrared band pass filter between the 4th lens and the imaging surface.

14. imaging lens system group, is sequentially included along optical axis by thing side to image side：First lens, the second lens, the 3rd lens and the 4th Lens, it is characterised in that

The thing side of first lens is convex surface；

At least one in the thing side of 3rd lens and image side surface is convex surface；

At least one in the thing side of 4th lens and image side surface is concave surface；

At least two in first lens, the 3rd lens and the 4th lens have positive light coke；

Second lens have positive light coke, and its effective focal length f2 and total effective focal length f of the imaging lens system group meet 2 ＜ F2/f ＜ 8.