CN107315236B - Imaging lens system group - Google Patents

Imaging lens system group Download PDF

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Publication number
CN107315236B
CN107315236B CN201710735300.8A CN201710735300A CN107315236B CN 107315236 B CN107315236 B CN 107315236B CN 201710735300 A CN201710735300 A CN 201710735300A CN 107315236 B CN107315236 B CN 107315236B
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lens
system group
imaging
lens system
imaging lens
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CN107315236A (en
Inventor
王新权
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Priority to CN201710735300.8A priority Critical patent/CN107315236B/en
Publication of CN107315236A publication Critical patent/CN107315236A/en
Priority to PCT/CN2018/080106 priority patent/WO2019037420A1/en
Priority to US16/231,092 priority patent/US11137571B2/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/004—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having four lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

This application discloses a kind of imaging lens system group, which sequentially includes: the first lens, the second lens, the third lens and the 4th lens by object side to image side along optical axis.The object side of first lens and the second lens is convex surface；The image side surface of the third lens is convex surface；The image side surface of 4th lens is concave surface；First lens and the third lens all have positive light coke；Second lens and the 4th lens all have positive light coke or negative power；Total effective focal length f of imaging lens system group and the Entry pupil diameters EPD of imaging lens system group meet f/EPD < 1.5.

Description

Imaging lens system group
Technical field
This application involves a kind of imaging lens system groups, more specifically, this application involves a kind of large aperture including four lens, The imaging lens system group of high brightness.
Background technique
As for example photosensitive coupling element (CCD) or Complimentary Metal-Oxide semiconductor element (CMOS) etc. commonly use photosensitive member The raising of part performance and the reduction of size propose more the high image quality of optical imaging system and miniaturization that match High requirement.
In order to meet the requirement of miniaturization, F-number Fno (total effective coke of camera lens that existing imaging lens system group usually configures Entry pupil diameters away from/camera lens) 2.0 or 2.0 or more, to have good optical property while realizing miniaturization.But It is that higher want is proposed to the imaging lens system group to match with the continuous development of the portable electronic products such as smart phone Ask, especially be directed to insufficient light (such as rainy days, dusk), hand shaking when, this F-number Fno be 2.0 or 2.0 with On imaging lens system group can no longer meet the imaging requirements of higher order.
Particularly, in infrared camera field, imaging lens system group also needs to have larger aperture while guaranteeing small size And higher brightness, it just can ensure that infrared lens in the preferred application in the fields such as detection, identification.
Summary of the invention
This application provides be applicable to portable electronic product, can at least solve or part solve it is in the prior art The imaging lens system group of at least one above-mentioned disadvantage.
On the one hand, this application provides a kind of imaging lens system group, the imaging lens system group along optical axis by object side to image side sequentially It include: the first lens, the second lens, the third lens and the 4th lens.The object side of first lens and the second lens can be convex Face；The image side surface of the third lens can be convex surface；The image side surface of 4th lens can be concave surface；First lens and the third lens can have There is positive light coke；Second lens and the 4th lens all have 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 object 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 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 Yu imaging lens system group of the first lens object side 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 Distance TTL can meet T12/TTL < 0.2 on object side to the axis of imaging lens system group imaging surface.
In one embodiment, the first lens on optical axis center thickness CT1 and the third lens on optical axis Heart thickness CT3 can meet 0.6 < CT1/CT3 < 1.3.
In one embodiment, the first lens on optical axis center thickness CT1, the second lens are in the center on optical axis Thickness CT2 and the third 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 third lens and the 4th lens are on optical axis Distance TTL can meet ∑ CT/ on the summation ∑ CT of heart thickness and the object side to the axis of imaging lens system group imaging surface of the first lens TTL < 0.6.
In one embodiment, at least one of the object side of the 4th lens and image side surface can have at least one anti- Qu Dian.
In one embodiment, have on effective half bore DT42 of the 4th lens image side surface and imaging lens system group imaging surface The half ImgH of effect pixel region diagonal line length can meet 0.7 < DT42/ImgH < 1.
In one embodiment, have on the effective half bore DT11 with imaging lens system group imaging surface of the first lens object side 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 object side and optical axis is to effective half mouthful of the second lens object side Distance SAG21 and second lens of the diameter vertex on optical axis can meet 0 < SAG21/CT2 < in the center thickness CT2 on optical axis 0.7。
In one embodiment, imaging lens system group may also include the infrared band being set between the 4th lens and imaging surface Pass filter.
On the other hand, present invention also provides a kind of imaging lens system groups, and the imaging lens system group is along optical axis by object side to image side It sequentially include: the first lens, the second lens, the third lens and the 4th lens.The object side of first lens can be convex surface；Third is saturating At least one of the object side of mirror and image side surface can be convex surface；At least one of the object side of 4th lens and image side surface can For concave surface；At least two in first lens, the third lens and the 4th lens can have positive light coke；Second lens can have just Total effective focal length f of focal power, effective focal length f2 and imaging lens system group can meet 2 < f2/f < 8.
In one embodiment, the first lens and the third 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 object 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 groups, and the imaging lens system group is along optical axis by object side to image side It sequentially include: the first lens, the second lens, the third lens and the 4th lens.The object side of first lens and the second lens For convex surface；The image side surface of the third lens can be convex surface；The image side surface of 4th lens can be concave surface；First lens and the third lens are equal There can be positive light coke；Second lens and the 4th lens all have positive light coke or negative power.Wherein, the first lens object side Effective half bore DT11 and imaging lens system group imaging surface on the half ImgH of effective pixel area diagonal line length can meet 0.5 < DT11/ImgH < 1.
On the other hand, present invention also provides a kind of imaging lens system groups, and the imaging lens system group is along optical axis by object side to image side It sequentially include: the first lens, the second lens, the third lens and the 4th lens.The object side of first lens and the second lens For convex surface；The image side surface of the third lens can be convex surface；The image side surface of 4th lens can be concave surface；First lens and the third lens are equal There can be positive light coke；Second lens and the 4th lens all have positive light coke or negative power.Wherein, the second lens object side Radius of curvature R 3 and the radius of curvature R 4 of the second lens image side surface can meet 0.5 < R3/R4 < 1.
On the other hand, present invention also provides a kind of imaging lens system groups, and the imaging lens system group is along optical axis by object side to image side It sequentially include: the first lens, the second lens, the third lens and the 4th lens.The object side of first lens and the second lens For convex surface；The image side surface of the third lens can be convex surface；The image side surface of 4th lens can be concave surface；First lens and the third lens are equal There can be positive light coke；Second lens and the 4th lens all have positive light coke or negative power.Wherein, the 4th lens image side surface Effective half bore DT42 and imaging lens system group imaging surface on the half ImgH of effective pixel area diagonal line length can meet 0.7 < DT42/ImgH < 1.
On the other hand, present invention also provides a kind of imaging lens system groups, and the imaging lens system group is along optical axis by object side to image side It sequentially include: the first lens, the second lens, the third lens and the 4th lens.The object side of first lens and the second lens For convex surface；The image side surface of the third lens can be convex surface；The image side surface of 4th lens can be concave surface；First lens and the third lens are equal There can be positive light coke；Second lens and the 4th lens all have positive light coke or negative power.Wherein, the second lens object side With the distance SAG21 and the second lens of effective half bore vertex of the intersection point of optical axis to the second lens object side on optical axis in light Center thickness CT2 on axis can meet 0 < SAG21/CT2 < 0.7.
On the other hand, present invention also provides a kind of imaging lens system groups, and the imaging lens system group is along optical axis by object side to image side It sequentially include: the first lens, the second lens, the third lens and the 4th lens.The object side of first lens and the second lens For convex surface；The image side surface of the third lens can be convex surface；The image side surface of 4th lens can be concave surface；First lens and the third lens are equal There can be positive light coke；Second lens and the 4th lens all have positive light coke or negative power.Imaging lens system group may also include The infrared band pass filter being set between the 4th lens and imaging surface.
The application uses such as four lens, passes through the center of each power of lens of reasonable distribution, face type, each lens Spacing etc. on axis between thickness and each lens, so that lens group while realizing good image quality, has ultra-thin, small At least one beneficial effect such as type, low sensitivity, large aperture, high brightness.
Detailed description of the invention
In conjunction with attached drawing, by the detailed description of following non-limiting embodiment, other features of the application, purpose and excellent Point will be apparent.In the accompanying drawings:
Fig. 1 shows the structural schematic diagram 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 axis 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 schematic diagram of the imaging lens system group according to the embodiment of the present application 2；
Fig. 4 A to Fig. 4 E respectively illustrates chromatic curve on the axis 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 schematic diagram of the imaging lens system group according to the embodiment of the present application 3；
Fig. 6 A to Fig. 6 E respectively illustrates chromatic curve on the axis 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 schematic diagram of the imaging lens system group according to the embodiment of the present application 4；
Fig. 8 A to Fig. 8 E respectively illustrates chromatic curve on the axis 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 schematic diagram of the imaging lens system group according to the embodiment of the present application 5；
Figure 10 A to Figure 10 E respectively illustrates chromatic curve on the axis 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 schematic diagram of the imaging lens system group according to the embodiment of the present application 6；
Figure 12 A to Figure 12 E respectively illustrates chromatic curve on the axis 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 schematic diagram of the imaging lens system group according to the embodiment of the present application 7；
Figure 14 A to Figure 14 E respectively illustrates chromatic curve on the axis of the imaging lens system group of embodiment 7, astigmatism curve, distortion Curve, ratio chromatism, curve and relative illumination curve.
Specific embodiment
Various aspects of the reference attached drawing to the application are made more detailed description by the application in order to better understand.It answers Understand, the only description to the illustrative embodiments of the application is described in detail in these, rather than limits the application in any way Range.In the specification, the identical element of identical reference numbers.Stating "and/or" includes associated institute Any and all combinations of one or more of list of items.
It should be noted that in the present specification, first, second, third, etc. statement is only used for a feature and another spy Sign distinguishes, without indicating any restrictions to feature.Therefore, without departing substantially from teachings of the present application, hereinafter The first lens discussed are also known as the second lens or the third lens.
In the accompanying drawings, for ease of description, thickness, the size and shape of lens are slightly exaggerated.Specifically, attached drawing Shown in spherical surface or aspherical shape be illustrated by way of example.That is, spherical surface or aspherical shape are not limited to attached drawing Shown in spherical surface or aspherical shape.Attached drawing is merely illustrative and and non-critical drawn to scale.
Herein, near axis area refers to the region near optical axis.If lens surface is convex surface and does not define convex surface position When setting, then it represents that the lens surface is convex surface near axis area is less than；If lens surface is concave surface and does not define the concave surface position When, then it represents that the lens surface is concave surface near axis area is less than.Surface in each lens near object is known as object side, Surface in each lens near imaging surface is known as image side surface.
It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory It indicates there is stated feature, element and/or component when using in bright book, but does not preclude the presence or addition of one or more Other feature, component, assembly unit and/or their combination.In addition, ought the statement of such as at least one of " ... " appear in institute When after the list of column feature, entire listed feature is modified, rather than modifies the individual component in list.In addition, when describing this When the embodiment of application, " one or more embodiments of the application " are indicated using "available".Also, term " illustrative " It is intended to refer to example or illustration.
Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein all have with The application one skilled in the art's is generally understood identical meaning.It will also be appreciated that term (such as in everyday words Term defined in allusion quotation) it should be interpreted as having and their consistent meanings of meaning in the context of the relevant technologies, and It will not be explained with idealization or excessively formal sense, unless clear herein so limit.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The feature of the application, principle and other aspects are described in detail below.
Imaging lens system group according to the application illustrative embodiments includes such as four lens with focal power, that is, First lens, the second lens, the third lens and the 4th lens.This four lens along optical axis from object side to image side sequential.
Imaging lens system group may also include the photosensitive element for being set to imaging surface, the effective pixel area diagonal line of photosensitive element Long half is ImgH.
First lens can have positive light coke, with larger refractive power, be conducive to shorten lens group overall length, subtract Lenslet group volume.The object side of first lens can be convex surface, the radius of curvature R 1 of object 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 Sufficient 0.5 < R1/f < 1.2 of conditional, is conducive to shortening system overall length；Meanwhile increase system light-inletting quantity is also helped to be increased to Reach the infrared luminous intensity of image planes.
Second lens have positive light coke or negative power, and object side can be convex surface, are conducive to balance off-axis aberration, mention High imaging quality.Optionally, the second lens can have positive light coke, total effective focal length of effective focal length f2 and 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 is conducive to system focal power and aberration balancing, shortens system overall length.
Optionally, the object side of the second lens can be convex surface, and image side surface can be concave surface.The curvature of second lens object side half 0.5 < R3/R4 < 1 can be met between diameter R3 and the radius of curvature R 4 of the second lens image side surface, more specifically, R3 and R4 are further 0.65≤R3/R4≤0.85 can be met.Meet 0.5 < R3/R4 < 1 of conditional, is conducive to disperse the first power of lens, from And avoid leading to the first lens surface overbending because focal power is excessively concentrated, manufacture difficulty is larger；Meanwhile meeting conditional 0.5 < R3/R4 < 1 is also beneficial to increase system light-inletting quantity.
The third lens can have a positive light coke, and image side surface can be convex surface, such dispersion being disposed with conducive to focal power, So as to reduce the angle of field rays and optical axis outside axis, and then improve the astigmatism problem of the outer visual field of axis.
4th lens have positive light coke or negative power, and image side surface is concave surface, such to be disposed with conducive to imaging surface It is close to object side, so as to shorten system entire length, realize miniaturization.Optionally, in the object side and image side surface of the 4th lens At least one have at least one point of inflexion.The object side of 4th lens or image side surface have at least one point of inflexion, can be with The outer visual field optical path of adjustment axis, reduces the surface incidence angle of the outer visual field of axis, while can reduce the coma and astigmatism of the outer visual field of axis.
In the application, can the spacing distance the center thickness and each lens between each lens optimize, taken the photograph with realizing As the preferable optical property of lens group.
First lens can expire between the center thickness CT3 on optical axis in the center thickness CT1 on optical axis and the third lens 0.6 < CT1/CT3 < 1.3 of foot, more specifically, CT1 and CT3 can further meet 0.67≤CT1/CT3≤1.24.Meet condition 0.6 < CT1/CT3 < 1.3 of formula, is conducive to decentralized system focal power, to avoid focal power concentrations in the first lens or third On lens, so avoid concentrations as focal power and caused by tolerance it is sensitive, and due to the concentrations of focal power Caused by and the problems such as lens surface overbending, difficult forming.
First lens on optical axis center thickness CT1, the second lens are in center thickness CT2 and the third 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.Meet conditional 0.4 < CT1/ (CT2+CT3) < 0.9, helps Relatively reasonable space layout is obtained in the first lens, the second lens, the third lens, to be conducive to the dispersion 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 refer to the first lens, the second lens, the third 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 object side at Distance on the axis of image planes) between can meet ∑ CT/TTL < 0.6, more specifically, ∑ CT and TTL can further meet 0.46≤∑ CT/TTL≤0.51.Meet conditional ∑ CT/TTL < 0.6, is conducive to the entire length for shortening lens group.Meanwhile increasing each Spacing distance between mirror is also beneficial to the tolerance sensitivity of reduction system, promotes the quality of lens group batch production and 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 item Part formula T12/TTL < 0.2, is conducive to the effective aperture for compressing the second lens, and reducing glass packet size realizes small size performance.
The half of effective pixel area diagonal line length on the effective half bore DT11 and imaging surface of first lens object side 0.5 < DT11/ImgH < 1 can be met between ImgH, more specifically, DT11 and ImgH can further meet 0.52≤DT11/ ImgH≤0.63.Meet 0.5 < DT11/ImgH < 1 of conditional, is conducive to the entire length for shortening lens group；At the same time it can also So that system has biggish light-inletting quantity, photosensitive element output signal-noise ratio is improved.
The half of effective pixel area diagonal line length on the effective half bore DT42 and imaging surface of 4th lens image side surface 0.7 < DT42/ImgH < 1 can be met between ImgH, more specifically, DT42 and ImgH can further meet 0.83≤DT42/ ImgH≤0.99.It is excessively steep when can be to avoid because of off-axis ray by four lens to meet 0.7 < DT42/ImgH < 1 of conditional Tolerance that is high and steep and generating is sensitive；Meanwhile such arrangement also helps the miniaturization of lens group.
The intersection point of the object sides of second lens and optical axis is to the axis between effective half bore vertex of the second lens object side On distance SAG21 and the second lens can meet 0 < SAG21/CT2 < 0.7 between the center thickness CT2 on optical axis, more specifically Ground, SAG21 and CT2 can further meet 0.15≤SAG21/CT2≤0.60.Meet 0 < SAG21/CT2 < 0.7 of conditional, has Conducive to the effective aperture for reducing the second lens, to be conducive to the processing and molding 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.Meet conditional f/EPD < 1.5, it can be effectively The energy density in image planes is improved, to be conducive to improve image space sensor output signal-noise ratio.
Optionally, it may be provided with infrared band pass filter between the 4th lens and imaging surface, it is infrared for being filtered through Light, that is, eliminates non-infrared light bring signal interference at the problems such as eliminating color difference caused by non-infrared light, image blur.
In the exemplary embodiment, the imaging lens system group of the application may also include at least one diaphragm.Diaphragm can basis Need to be set to any position between object side and image side.By the appropriate selection to stop position, can effectively correct with The related aberration of diaphragm (for example, coma, astigmatism, distortion and axial chromatic aberration), to improve the image quality of camera lens.Optionally, light Door screen may be disposed between object side and the first lens.Optionally, diaphragm may be disposed between the first lens and the second lens.
Optionally, above-mentioned imaging lens system group may also include the protection glass for protecting the photosensitive element 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 embodiment of the application Piece.By each power of lens of reasonable distribution, face type, each lens center thickness and each lens between axis on spacing Deng the volume that can effectively reduce lens group, the machinability for reducing the susceptibility of lens group and improving lens group, so that camera shooting Lens group, which is more advantageous to, to be produced and processed and is applicable to portable electronic product.Meanwhile imaging lens system through the above configuration Group also has the beneficial effect such as ultra-thin, large aperture, high brightness, high image quality.
In presently filed embodiment, at least one of mirror 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 there is improvement to distort aberration and improve picture The advantages of dissipating 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 solution the case where Under, the lens numbers for constituting imaging lens system group can be changed, to obtain each result and advantage described in this specification.For example, Although being described by taking four lens as an example in embodiments, which 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 being applicable to the imaging lens system group of above embodiment is further described with reference to the accompanying drawings.
Embodiment 1
Referring to Fig. 1 to Fig. 2 E description according to the imaging lens system group of the embodiment of the present application 1.Fig. 1 is shown according to this Shen Please embodiment 1 imaging lens system group structural schematic diagram.
As shown in Figure 1, imaging lens system group extremely sequentially includes the first lens L1, the second lens at image side by object side along optical axis L2, the third lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being set to imaging surface S11 Part.
First lens L1 has a positive light coke, and object side S1 is convex surface, and image side surface S2 is concave surface, and the first lens L1 Object side S1 and image side surface S2 is aspherical.
Second lens L2 has a positive light coke, and object side S3 is convex surface, and image side surface S4 is concave surface, and the second lens L2 Object side S3 and image side surface S4 is aspherical.
The third lens L3 has a positive light coke, and object side S5 is concave surface, and image side surface S6 is convex surface, and the third lens L3 Object side S5 and image side surface S6 is aspherical.
4th lens L4 has a positive light coke, and object side S7 is convex surface, and image side surface S8 is concave surface, and the 4th lens L4 Object side S7 and image side surface S8 is aspherical.
Optionally, imaging lens system group may also include the optical filter L5 with object side S9 and image side surface S10.Optical filter L5 can For infrared band pass filter.Light from object sequentially passes through each surface S1 to S10 and is ultimately imaged on imaging surface S11.
Optionally, the diaphragm STO for limiting light beam can be set between object side and the first lens L1, it is saturating to promote camera 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 Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 1
It can be obtained by table 1, the song of the image side surface S4 of the radius of curvature R 3 and the second lens L2 of the object side S3 of the second lens L2 Meet R3/R4=0.73 between rate radius R4；First lens L1 is in the center thickness CT1 and the third lens L3 on optical axis in optical axis On center thickness CT3 between meet CT1/CT3=0.82；First lens L1 is in center thickness CT1, the second lens on optical axis L2 on optical axis center thickness CT2 and the third lens L3 in the center thickness CT3 on optical axis meet CT1/ (CT2+CT3)= 0.52。
In embodiment 1, non-spherical lens can be used in each lens, and each aspherical face type x is limited by following formula:
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 give can be used for it is each aspherical in embodiment 1 The high-order coefficient A of mirror surface S1-S84、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
The following table 3 provides the effective focal length f1 to f4 of the total effective focal length f, each lens of imaging lens system group in embodiment 1, camera 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 center to the axis of imaging surface S11 of the object side S1 of the first lens L1).
Table 3
It can be obtained by upper table 1 and table 3, between the effective focal length f2 of the second lens L2 and total effective focal length f of imaging lens system group Meet f2/f=2.56；Between the radius of curvature R 1 of the object side S1 of first lens L1 and total effective focal length f of imaging lens system group Meet R1/f=0.74；The optics of first lens L1 and the second lens L2 the spacing distance T12 on optical axis and imaging lens system group Meet T12/TTL=0.06 between total length TTL；First lens L1, the second lens L2, the third lens L3 and the 4th lens L4 points Σ CT/TTL=is not met 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, meet 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；It is effective on the effective half bore DT11 and the imaging surface S11 of imaging lens system group of the object side S1 of first lens L1 Meet DT11/ImgH=0.61 between the half ImgH of pixel region diagonal line length；The image side surface S8's of 4th lens L4 is effective Meet between the half ImgH of effective pixel area diagonal line length on the half bore DT42 and imaging surface S11 of imaging lens system group DT42/ImgH=0.99；The intersection point of the object side S3 of second lens L2 and optical axis to the second lens L2 object side S3 it is effective Distance SAG21 and the second lens L2 meet SAG21/ between the center thickness CT2 on optical axis on axis between half bore vertex CT2=0.45.
Fig. 2A shows chromatic curve on the axis of the imaging lens system group of embodiment 1, indicate the light of different wave length via Converging focal point after lens group deviates.Fig. 2 B shows the astigmatism curve of the imaging lens system group of embodiment 1, indicates meridianal image surface Bending and sagittal image surface bending.Fig. 2 C shows the distortion curve of the imaging lens system group of embodiment 1, indicates different perspectives situation Under distortion sizes values.Fig. 2 D shows the ratio chromatism, curve of the imaging lens system group of embodiment 1, indicates light via lens The deviation of different image heights after group on imaging surface.Fig. 2 E shows the relative illumination curve of the imaging lens system group of embodiment 1, It indicates relative illumination corresponding to different image heights on imaging surface.A to Fig. 2 E is it is found that camera shooting given by embodiment 1 according to fig. 2 Lens group can be realized 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 schematic diagram.
As shown in figure 3, imaging lens system group extremely sequentially includes the first lens L1, the second lens at image side by object side along optical axis L2, the third lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being set to imaging surface S11 Part.
First lens L1 has a positive light coke, and object side S1 is convex surface, and image side surface S2 is concave surface, and the first lens L1 Object side S1 and image side surface S2 is aspherical.
Second lens L2 has a positive light coke, and object side S3 is convex surface, and image side surface S4 is concave surface, and the second lens L2 Object side S3 and image side surface S4 is aspherical.
The third lens L3 has a positive light coke, and object side S5 is concave surface, and image side surface S6 is convex surface, and the third lens L3 Object side S5 and image side surface S6 is aspherical.
4th lens L4 has a negative power, and object side S7 is convex surface, and image side surface S8 is concave surface, and the 4th lens L4 Object side S7 and image side surface S8 is aspherical.
Optionally, imaging lens system group may also include the optical filter L5 with object side S9 and image side surface S10.Optical filter L5 can For infrared band pass filter.Light from object sequentially passes through each surface S1 to S10 and is ultimately imaged on imaging surface S11.
Optionally, the diaphragm STO for limiting light beam can be set between the first lens L1 and the second lens L2, to be promoted 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 Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).Table 5 show can be used for it is each aspherical in embodiment 2 The high-order coefficient of mirror surface, wherein each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.Table 6 is shown Total effective focal length f of imaging lens system group in embodiment 2, the effective focal length f1 to f4 of each lens, imaging lens system group imaging surface 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 0.0000E+00
Table 5
Table 6
Fig. 4 A shows chromatic curve on the axis of the imaging lens system group of embodiment 2, indicate the light of different wave length via Converging focal point after lens group deviates.Fig. 4 B shows the astigmatism curve of the imaging lens system group of embodiment 2, indicates meridianal image surface Bending and sagittal image surface bending.Fig. 4 C shows the distortion curve of the imaging lens system group of embodiment 2, indicates different perspectives situation Under distortion sizes values.Fig. 4 D shows the ratio chromatism, curve of the imaging lens system group of embodiment 2, indicates light via lens The deviation of different image heights after group on imaging surface.Fig. 4 E shows the relative illumination curve of the imaging lens system group of embodiment 2, It indicates relative illumination corresponding to different image heights on imaging surface.According to Fig. 4 A to Fig. 4 E it is found that camera shooting given by embodiment 2 Lens group can be realized 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 schematic diagram of the imaging lens system group of embodiment 3.
As shown in figure 5, imaging lens system group extremely sequentially includes the first lens L1, the second lens at image side by object side along optical axis L2, the third lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being set to imaging surface S11 Part.
First lens L1 has a positive light coke, and object side S1 is convex surface, and image side surface S2 is concave surface, and the first lens L1 Object side S1 and image side surface S2 is aspherical.
Second lens L2 has a positive light coke, and object side S3 is convex surface, and image side surface S4 is concave surface, and the second lens L2 Object side S3 and image side surface S4 is aspherical.
The third lens L3 has a positive light coke, and object side S5 is convex surface, and image side surface S6 is convex surface, and the third lens L3 Object side S5 and image side surface S6 is aspherical.
4th lens L4 has a negative power, and object side S7 is convex surface, and image side surface S8 is concave surface, and the 4th lens L4 Object side S7 and image side surface S8 is aspherical.
Optionally, imaging lens system group may also include the optical filter L5 with object side S9 and image side surface S10.Optical filter L5 can For infrared band pass filter.Light from object sequentially passes through each surface S1 to S10 and is ultimately imaged on imaging surface S11.
Optionally, the diaphragm STO for limiting light beam can be set between the first lens L1 and the second lens L2, to be promoted The image quality of imaging lens system group.
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 Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).Table 8 show can be used for it is each aspherical in embodiment 3 The high-order coefficient of mirror surface, wherein each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.Table 9 is shown Total effective focal length f of imaging lens system group in embodiment 3, the effective focal length f1 to f4 of each lens, imaging lens system group imaging surface 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 shows chromatic curve on the axis of the imaging lens system group of embodiment 3, indicate the light of different wave length via Converging focal point after lens group deviates.Fig. 6 B shows the astigmatism curve of the imaging lens system group of embodiment 3, indicates meridianal image surface Bending and sagittal image surface bending.Fig. 6 C shows the distortion curve of the imaging lens system group of embodiment 3, indicates different perspectives situation Under distortion sizes values.Fig. 6 D shows the ratio chromatism, curve of the imaging lens system group of embodiment 3, indicates light via lens The deviation of different image heights after group on imaging surface.Fig. 6 E shows the relative illumination curve of the imaging lens system group of embodiment 3, It indicates relative illumination corresponding to different image heights on imaging surface.According to Fig. 6 A to Fig. 6 E it is found that camera shooting given by embodiment 3 Lens group can be realized 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 schematic diagram of the imaging lens system group of embodiment 4.
As shown in fig. 7, imaging lens system group extremely sequentially includes the first lens L1, the second lens at image side by object side along optical axis L2, the third lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being set to imaging surface S11 Part.
First lens L1 has a positive light coke, and object side S1 is convex surface, and image side surface S2 is concave surface, and the first lens L1 Object side S1 and image side surface S2 is aspherical.
Second lens L2 has a positive light coke, and object side S3 is convex surface, and image side surface S4 is concave surface, and the second lens L2 Object side S3 and image side surface S4 is aspherical.
The third lens L3 has a positive light coke, and object side S5 is concave surface, and image side surface S6 is convex surface, and the third lens L3 Object side S5 and image side surface S6 is aspherical.
4th lens L4 has a negative power, and object side S7 is concave surface, and image side surface S8 is concave surface, and the 4th lens L4 Object side S7 and image side surface S8 is aspherical.
Optionally, imaging lens system group may also include the optical filter L5 with object side S9 and image side surface S10.Optical filter L5 can For infrared band pass filter.Light from object sequentially passes through each surface S1 to S10 and is ultimately imaged on imaging surface S11.
Optionally, the diaphragm STO for limiting light beam can be set between the first lens L1 and the second lens L2, to be promoted The image quality of imaging lens system group.
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 radius of curvature and the unit of thickness are millimeter (mm).Table 11 show can be used for it is each non-in embodiment 4 The high-order coefficient of spherical mirror surface, wherein each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.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 at 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 0.0000E+00
Table 11
Table 12
Fig. 8 A shows chromatic curve on the axis of the imaging lens system group of embodiment 4, indicate the light of different wave length via Converging focal point after lens group deviates.Fig. 8 B shows the astigmatism curve of the imaging lens system group of embodiment 4, indicates meridianal image surface Bending and sagittal image surface bending.Fig. 8 C shows the distortion curve of the imaging lens system group of embodiment 4, indicates different perspectives situation Under distortion sizes values.Fig. 8 D shows the ratio chromatism, curve of the imaging lens system group of embodiment 4, indicates light via lens The deviation of different image heights after group on imaging surface.Fig. 8 E shows the relative illumination curve of the imaging lens system group of embodiment 4, It indicates relative illumination corresponding to different image heights on imaging surface.According to Fig. 8 A to Fig. 8 E it is found that camera shooting given by embodiment 4 Lens group can be realized 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 schematic diagram of the imaging lens system group of embodiment 5.
As shown in figure 9, imaging lens system group extremely sequentially includes the first lens L1, the second lens at image side by object side along optical axis L2, the third lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being set to imaging surface S11 Part.
First lens L1 has a positive light coke, and object side S1 is convex surface, and image side surface S2 is concave surface, and the first lens L1 Object side S1 and image side surface S2 is aspherical.
Second lens L2 has a positive light coke, and object side S3 is convex surface, and image side surface S4 is concave surface, and the second lens L2 Object side S3 and image side surface S4 is aspherical.
The third lens L3 has a positive light coke, and object side S5 is concave surface, and image side surface S6 is convex surface, and the third lens L3 Object side S5 and image side surface S6 is aspherical.
4th lens L4 has a negative power, and object side S7 is convex surface, and image side surface S8 is concave surface, and the 4th lens L4 Object side S7 and image side surface S8 is aspherical.
Optionally, imaging lens system group may also include the optical filter L5 with object side S9 and image side surface S10.Optical filter L5 can For infrared band pass filter.Light from object sequentially passes through each surface S1 to S10 and is ultimately imaged on imaging surface S11.
Optionally, the diaphragm STO for limiting light beam can be set between object side and the first lens L1, it is saturating to promote camera shooting The image quality of microscope group.
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 radius of curvature and the unit of thickness are millimeter (mm).Table 14 show can be used for it is each non-in embodiment 5 The high-order coefficient of spherical mirror surface, wherein each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.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 at 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 shows chromatic curve on the axis of the imaging lens system group of embodiment 5, indicate the light of different wave length via Converging focal point after lens group deviates.Figure 10 B shows the astigmatism curve of the imaging lens system group of embodiment 5, indicates meridian picture Face bending and sagittal image surface bending.Figure 10 C shows the distortion curve of the imaging lens system group of embodiment 5, indicates different perspectives In the case of distortion sizes values.Figure 10 D shows the ratio chromatism, curve of the imaging lens system group of embodiment 5, indicates light warp By the deviation of the different image heights after lens group on imaging surface.Figure 10 E shows contrasting for the imaging lens system group of embodiment 5 It writes music line, indicates relative illumination corresponding to different image heights on imaging surface.According to Figure 10 A to Figure 10 E it is found that 5 institute of embodiment The imaging lens system group provided can be realized 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 schematic diagram of the imaging lens system group of the embodiment of the present application 6.
As shown in figure 11, imaging lens system group extremely sequentially includes the first lens L1, the second lens at image side by object side along optical axis L2, the third lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being set to imaging surface S11 Part.
First lens L1 has a positive light coke, and object side S1 is convex surface, and image side surface S2 is concave surface, and the first lens L1 Object side S1 and image side surface S2 is aspherical.
Second lens L2 has a positive light coke, and object side S3 is convex surface, and image side surface S4 is concave surface, and the second lens L2 Object side S3 and image side surface S4 is aspherical.
The third lens L3 has a positive light coke, and object side S5 is concave surface, and image side surface S6 is convex surface, and the third lens L3 Object side S5 and image side surface S6 is aspherical.
4th lens L4 has a negative power, and object side S7 is convex surface, and image side surface S8 is concave surface, and the 4th lens L4 Object side S7 and image side surface S8 is aspherical.
Optionally, imaging lens system group may also include the optical filter L5 with object side S9 and image side surface S10.Optical filter L5 can For infrared band pass filter.Light from object sequentially passes through each surface S1 to S10 and is ultimately imaged on imaging surface S11.
Optionally, the diaphragm STO for limiting light beam can be set between object side and the first lens L1, it is saturating to promote camera shooting The image quality of microscope group.
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 radius of curvature and the unit of thickness are millimeter (mm).Table 17 show can be used for it is each non-in embodiment 6 The high-order coefficient of spherical mirror surface, wherein each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.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 at 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 shows chromatic curve on the axis of the imaging lens system group of embodiment 6, indicate the light of different wave length via Converging focal point after lens group deviates.Figure 12 B shows the astigmatism curve of the imaging lens system group of embodiment 6, indicates meridian picture Face bending and sagittal image surface bending.Figure 12 C shows the distortion curve of the imaging lens system group of embodiment 6, indicates different perspectives In the case of distortion sizes values.Figure 12 D shows the ratio chromatism, curve of the imaging lens system group of embodiment 6, indicates light warp By the deviation of the different image heights after lens group on imaging surface.Figure 12 E shows contrasting for the imaging lens system group of embodiment 6 It writes music line, indicates relative illumination corresponding to different image heights on imaging surface.According to Figure 12 A to Figure 12 E it is found that 6 institute of embodiment The imaging lens system group provided can be realized 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 schematic diagram of the imaging lens system group of the embodiment of the present application 7.
As shown in figure 13, imaging lens system group extremely sequentially includes the first lens L1, the second lens at image side by object side along optical axis L2, the third lens L3, the 4th lens L4 and imaging surface S11.Imaging lens system group may also include the photosensitive member for being set to imaging surface S11 Part.
First lens L1 has a positive light coke, and object side S1 is convex surface, and image side surface S2 is concave surface, and the first lens L1 Object side S1 and image side surface S2 is aspherical.
Second lens L2 has a positive light coke, and object side S3 is convex surface, and image side surface S4 is concave surface, and the second lens L2 Object side S3 and image side surface S4 is aspherical.
The third lens L3 has a positive light coke, and object side S5 is convex surface, and image side surface S6 is convex surface, and the third lens L3 Object side S5 and image side surface S6 is aspherical.
4th lens L4 has a negative power, and object side S7 is concave surface, and image side surface S8 is concave surface, and the 4th lens L4 Object side S7 and image side surface S8 is aspherical.
Optionally, imaging lens system group may also include the optical filter L5 with object side S9 and image side surface S10.Optical filter L5 can For infrared band pass filter.Light from object sequentially passes through each surface S1 to S10 and is ultimately imaged on imaging surface S11.
Optionally, the diaphragm STO for limiting light beam can be set between the first lens L1 and the second lens L2, to be promoted The image quality of imaging lens system group.
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 radius of curvature and the unit of thickness are millimeter (mm).Table 20 show can be used for it is each non-in embodiment 7 The high-order coefficient of spherical mirror surface, wherein each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.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 at 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 0.0000E+00
Table 20
Table 21
Figure 14 A shows chromatic curve on the axis of the imaging lens system group of embodiment 7, indicate the light of different wave length via Converging focal point after lens group deviates.Figure 14 B shows the astigmatism curve of the imaging lens system group of embodiment 7, indicates meridian picture Face bending and sagittal image surface bending.Figure 14 C shows the distortion curve of the imaging lens system group of embodiment 7, indicates different perspectives In the case of distortion sizes values.Figure 14 D shows the ratio chromatism, curve of the imaging lens system group of embodiment 7, indicates light warp By the deviation of the different image heights after lens group on imaging surface.Figure 14 E shows contrasting for the imaging lens system group of embodiment 7 It writes music line, indicates relative illumination corresponding to different image heights on imaging surface.According to Figure 14 A to Figure 14 E it is found that 7 institute of embodiment The imaging lens system group provided can be realized good image quality.
To sum up, embodiment 1 to embodiment 7 meets relationship shown in following table 22 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 photographic device, and electronics photosensitive element can be photosensitive coupling element (CCD) or complementation Property matal-oxide semiconductor element (CMOS).Photographic device can be the independent picture pick-up device of such as digital camera, be also possible to The photographing module being integrated on the mobile electronic devices such as mobile phone.The photographic 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.Those skilled in the art Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein Can technical characteristic replaced mutually and the technical solution that is formed.

Claims (27)

  1. It by object side to image side sequentially include: the first lens, the second lens, the third lens and the 4th along optical axis 1. imaging lens system group Lens, which is characterized in that
    The object side of first lens and second lens is convex surface；
    The image side surface of the third lens is convex surface；
    The image side surface of 4th lens is concave surface；
    First lens and the third lens all have positive light coke；
    Second lens and the 4th lens all have positive light coke or negative power；
    Total effective focal length f of the imaging lens system group and the Entry pupil diameters EPD of the imaging lens system group meet f/EPD < 1.5, with And
    Effective pixel area pair on the effective half bore DT11 and the imaging lens system group imaging surface of the first lens object side The long half ImgH of linea angulata meets 0.5 < DT11/ImgH < 1.
  2. 2. imaging lens system group according to claim 1, which is characterized in that the image side surface of second lens is concave surface, institute The radius of curvature R 4 of the radius of curvature R 3 and the second lens image side surface of stating the second lens object side meets 0.5 < R3/R4 < 1。
  3. 3. imaging lens system group according to claim 1 or 2, which is characterized in that second lens have positive light coke, Effective focal length f2 and total effective focal length f of the imaging lens system group meet 2 < f2/f < 8.
  4. 4. imaging lens system group according to claim 1, which is characterized in that the radius of curvature R 1 of the first lens object side Meet 0.5 < R1/f < 1.2 with total effective focal length f of the imaging lens system group.
  5. 5. according to claim 1, imaging lens system group described in any one of 2 or 4, which is characterized in that first lens and institute Object side to the imaging lens system group for stating spacing distance T12 of second lens on the optical axis and first lens is imaged Distance TTL meets T12/TTL < 0.2 on the axis in face.
  6. 6. imaging lens system group according to claim 1, which is characterized in that first lens are in the center on the optical axis Thickness CT1 and the third lens are in the 0.6 < CT1/CT3 < 1.3 of center thickness CT3 satisfaction on the optical axis.
  7. 7. imaging lens system group according to claim 1, which is characterized in that first lens are in the center on the optical axis Thickness CT1, second lens on the optical axis center thickness CT2 and the third lens on the optical axis Heart thickness CT3 meets 0.4 < CT1/ (CT2+CT3) < 0.9.
  8. 8. according to claim 1, imaging lens system group described in any one of 6 or 7, which is characterized in that first lens, described Second lens, the third lens and the 4th lens respectively at the center thickness on the optical axis summation ∑ CT with it is described Distance TTL meets ∑ CT/TTL < 0.6 on the object side of first lens to the axis of the imaging lens system group imaging surface.
  9. 9. imaging lens system group according to claim 7, which is characterized in that in the object side and image side surface of the 4th lens At least one have at least one point of inflexion.
  10. 10. according to claim 1 or imaging lens system group described in 9, which is characterized in that effectively the half of the 4th lens image side surface Bore DT42 and the half ImgH of effective pixel area diagonal line length on the imaging lens system group imaging surface meet 0.7 < DT42/ ImgH < 1.
  11. 11. imaging lens system group according to claim 1 or 2, which is characterized in that the second lens object side and the light The intersection point of axis to the second lens object side distance SAG21 and described second of effective half bore vertex on the optical axis Lens meet 0 < SAG21/CT2 < 0.7 in the center thickness CT2 on the optical axis.
  12. 12. imaging lens system group according to claim 1, which is characterized in that the imaging lens system group further includes being set to institute State the infrared band pass filter between the 4th lens and the imaging surface.
  13. It by object side to image side sequentially include: the first lens, the second lens, the third lens and the 4th along optical axis 13. imaging lens system group Lens, which is characterized in that
    The object side of first lens is convex surface；
    At least one of the object side of the third lens and image side surface are convex surface；
    At least one of the object side of 4th lens and image side surface are concave surface；
    At least two in first lens, the third lens and the 4th lens have positive light coke；
    Second lens have positive light coke, 2 < of total effective focal length f satisfaction of effective focal length f2 and the imaging lens system group F2/f < 8, and
    Effective pixel area pair on the effective half bore DT11 and the imaging lens system group imaging surface of the first lens object side The long half ImgH of linea angulata meets 0.5 < DT11/ImgH < 1.
  14. 14. imaging lens system group according to claim 13, which is characterized in that first lens and the third lens are equal With positive light coke.
  15. 15. imaging lens system group according to claim 14, which is characterized in that first lens are on the optical axis Heart thickness CT1 and the third lens are in the 0.6 < CT1/CT3 < 1.3 of center thickness CT3 satisfaction on the optical axis.
  16. 16. imaging lens system group according to claim 14, which is characterized in that first lens are on the optical axis Heart thickness CT1, second lens on the optical axis center thickness CT2 and the third lens on the optical axis Center thickness CT3 meets 0.4 < CT1/ (CT2+CT3) < 0.9.
  17. 17. imaging lens system group according to claim 13, which is characterized in that first lens, second lens, institute The third lens and the 4th lens are stated respectively at the summation ∑ CT and first lens of the center thickness on the optical axis Distance TTL meets ∑ CT/TTL < 0.6 on object side to the axis of the imaging lens system group imaging surface.
  18. 18. imaging lens system group according to claim 17, which is characterized in that first lens and second lens exist Spacing distance T12 on the optical axis and distance on the object side to the axis of the imaging lens system group imaging surface of first lens TTL meets T12/TTL < 0.2.
  19. 19. imaging lens system group according to claim 17, which is characterized in that the image side surface of the 4th lens is concave surface.
  20. 20. imaging lens system group according to claim 19, which is characterized in that the object side of the 4th lens and image side surface At least one of have at least one point of inflexion.
  21. 21. imaging lens system group according to claim 20, which is characterized in that effective half mouthful of the 4th lens image side surface Diameter DT42 and the half ImgH of effective pixel area diagonal line length on the imaging lens system group imaging surface meet 0.7 < DT42/ ImgH < 1.
  22. 22. imaging lens system group according to claim 13, which is characterized in that the object side of second lens is convex surface, Image side surface is concave surface.
  23. 23. imaging lens system group according to claim 22, which is characterized in that the radius of curvature of the second lens object side The radius of curvature R 4 of R3 and the second lens image side surface meets 0.5 < R3/R4 < 1.
  24. 24. imaging lens system group according to claim 22, which is characterized in that the second lens object side and the optical axis Intersection point to the second lens object side distance SAG21 of effective half bore vertex on the optical axis with described second thoroughly Mirror meets 0 < SAG21/CT2 < 0.7 in the center thickness CT2 on the optical axis.
  25. 25. imaging lens system group according to claim 13, which is characterized in that the radius of curvature of the first lens object side R1 and total effective focal length f of the imaging lens system group meet 0.5 < R1/f < 1.2.
  26. 26. imaging lens system group according to claim 25, which is characterized in that total effective focal length f of the imaging lens system group Meet f/EPD < 1.5 with the Entry pupil diameters EPD of the imaging lens system group.
  27. 27. imaging lens system group described in any one of 3 to 26 according to claim 1, which is characterized in that the imaging lens system group is also Including the infrared band pass filter being set between the 4th lens and the imaging surface.
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