CN109765679A - Optical imaging lens and electronic equipment - Google Patents
Optical imaging lens and electronic equipment Download PDFInfo
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- CN109765679A CN109765679A CN201910249267.7A CN201910249267A CN109765679A CN 109765679 A CN109765679 A CN 109765679A CN 201910249267 A CN201910249267 A CN 201910249267A CN 109765679 A CN109765679 A CN 109765679A
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Abstract
Optical imaging lens disclosed by the invention are eight chip lens arrangements, first lens and the third lens all have positive refracting power, second lens and the 8th lens all have negative refracting power, first lens image side surface is concave surface at dipped beam axis, 4th lens object side is concave surface at dipped beam axis, 8th lens image side surface is concave surface at dipped beam axis, and its image side surface has at least one point of inflexion.By the refracting power of each lens of reasonable distribution, face shape, each lens center thickness and each lens between axis on spacing etc., it enables to this optical lens length shorter and there is large aperture and excellent field of view angle, and good image quality can be reached, therefore this optical imaging lens length is shorter and can have large aperture and excellent field of view angle, can reach good image quality.Invention additionally discloses a kind of electronic equipment.
Description
Technical field
The present invention relates to technical field of optical, more particularly to a kind of optical imaging lens.The invention further relates to one
Kind electronic equipment.
Background technique
With the very fast development of electronic technology, the electronic equipment of movable light has obtained rapid proliferation, such as intelligent hand
Machine, tablet computer, automobile data recorder and moving camera etc., this has been pushed simultaneously using photographing module phase on an electronic device
Pass technology flourishes.The photographing module that existing electronic equipment has is used in shooting distant view, some to be also used to shoot people
The occasions such as object, close shot, this to photographing module proposed using imaging performances such as the parsing power of camera lens, aperture, field angles it is higher
It is required that.In addition, progressing greatly with semiconductor fabrication process technology, has realized that the Pixel Dimensions of sensor devices reduce, has been adapted ground,
In order to meet the small form factor requirements of photographing module, the optical imaging lens being loaded in photographing module are also required to correspondingly shorten length
Degree.
Traditional light and thin type optical imaging lens mostly use the lens arrangement of few the piece number, but the lens arrangement of few the piece number is being bent
Roll over power distribution, aberration astigmatism correction, susceptibility distribution etc. have limitation, can not further satisfaction more high standard imaging
It is required that.
Summary of the invention
In view of this, the present invention provides a kind of optical imaging lens, lens length is shorter, and has large aperture and excellent
Field of view angle, and good image quality can be reached, can satisfy application requirement.The present invention also provides a kind of electronic equipment.
To achieve the above object, the present invention provides a kind of optical imaging lens, including what is set gradually by object side to image side
First lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th lens, it is each
Lens have towards the object side of object space and towards the image side surface of image space, in which: first lens and the third lens
Positive refracting power is all had, second lens and the 8th lens all have negative refracting power, the 4th lens, the described 5th
Lens, the 6th lens and the 7th lens are respectively provided with positive refracting power or negative refracting power；First lens image side
Face is concave surface at dipped beam axis, and the 4th lens object side is concave surface at dipped beam axis, and the 8th lens image side surface is in close
It is concave surface at optical axis, and its image side surface has at least one point of inflexion；
And it satisfies the following conditional expression:
|(f/EPD-Imgh)/(f/EPD+Imgh)|<1；
Wherein, f indicates that the focal length of the optical imaging lens, EPD indicate the Entry pupil diameters of the optical imaging lens,
Imgh indicates the half of the maximum image height of the optical imaging lens.
Preferably, the 7th lens object side is convex surface at dipped beam axis, and image side surface is concave surface at dipped beam axis.
Preferably, it also satisfies the following conditional expression: -0.1 < SD12-SD22< 0.20, wherein SD12Indicate the first lens picture
The effective radius of side, SD22Indicate the effective radius of the second lens image side surface.
Preferably, it also satisfies the following conditional expression: 0.2 < YC82/ f < 0.9, YC82Indicate anti-on the 8th lens image side surface
Song point arrives the vertical range of optical axis, and f indicates the focal length of the optical imaging lens.
Preferably, it also satisfies the following conditional expression: -1 < CT6*TAN(HFOV)/f6< 1, wherein CT6Indicate the 6th lens
In the thickness on optical axis, HFOV indicates the half at optical imaging lens maximum field of view angle, f6Indicate the 6th lens
Focal length.
Preferably, also satisfy the following conditional expression: 0 < ACT/f < 2, wherein ACT indicates first lens to the described 8th thoroughly
The sum of the thickness on optical axis, f indicate the focal length of the optical imaging lens to each lens of mirror respectively.
Preferably, it also satisfies the following conditional expression: | f1/f2| < 2, f1Indicate the focal length of first lens, f2Described in expression
The focal length of second lens.
Preferably, it also satisfies the following conditional expression: | R61/R62|≤5, wherein R61Indicate the song of the 6th lens object side
Rate radius, R62Indicate the radius of curvature of the 6th lens image side surface.
Preferably, it also satisfies the following conditional expression: 0.8 < SD82/ EPD < 2, SD82Indicate having for the 8th lens image side surface
Radius is imitated, EPD indicates the Entry pupil diameters of the optical imaging lens.
Preferably, it also satisfies the following conditional expression: 0.5 < YC72/YC82< 1.5, YC72It indicates on the 7th lens image side surface
Vertical range of the point of inflexion to optical axis, YC82Indicate on the 8th lens image side surface point of inflexion to the vertical range of optical axis.
Preferably, it also satisfies the following conditional expression: | SAG72/SAG81| < 4, SAG72Indicate the 7th lens image side surface and light
The intersection point of axis is to the maximum effective radius position of the 7th lens image side surface in the horizontal displacement distance of optical axis, SAG81Indicate institute
The intersection point of the 8th lens object side and optical axis is stated to the maximum effective radius position of the 8th lens object side in the water of optical axis
Flat shift length.
Preferably, it also satisfies the following conditional expression: 0 < T67/CT6≤ 1, T67Indicate the 6th lens and the 7th lens
In the airspace distance on optical axis, CT6Indicate the 6th lens in the thickness on optical axis.
Preferably, it also satisfies the following conditional expression: -2 < (R21+R22)/(R21-R22)≤5, R21Indicate the second lens object
The radius of curvature of side, R22Indicate the radius of curvature of the second lens image side surface.
As shown from the above technical solution, a kind of optical imaging lens provided by the present invention, including by object side to image side according to
The first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th of secondary setting
Lens, object space light successively pass through each lens, are imaged on the imaging surface of the 8th lens image side.This optical imaging lens is
Eight chip lens arrangements, by the refracting power of each lens of reasonable distribution, face shape, each lens center thickness and each lens between
Axis on spacing etc., enable to this optical lens length shorter, and there is large aperture and excellent field of view angle, and can reach
To good image quality.It, can wherein by the focal length of reasonable distribution optical imaging lens, Entry pupil diameters and maximum image height
Optical imaging lens are made to have both high pixel while with large aperture characteristic, so as to increase the light passing amount of imaging lens,
Enhance the illumination of imaging surface, while can also be achieved the imaging effect of the big image planes of camera lens.Therefore optical imaging lens disclosed by the invention
Head, lens length is shorter, and can have large aperture and excellent field of view angle, and can reach good image quality, energy
Enough meet application requirement.
A kind of electronic equipment provided by the invention, including photographic device, the photographic device include electronics photosensitive element and
Above-described optical imaging lens, the electronics photosensitive element are set to the imaging surface of the optical imaging lens.This electronics
The optical imaging lens that equipment includes, lens length is shorter, and has large aperture and excellent field of view angle, and can reach good
Good image quality, can satisfy application requirement.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of schematic diagram for optical imaging lens that the embodiment of the present invention 1 provides；
Fig. 2 is the perturbed field diagram of optical imaging lens in the embodiment of the present invention 1；
Fig. 3 is the spherical aberration curve graph of optical imaging lens in the embodiment of the present invention 1；
Fig. 4 is a kind of schematic diagram for optical imaging lens that the embodiment of the present invention 2 provides；
Fig. 5 is the perturbed field diagram of optical imaging lens in the embodiment of the present invention 2；
Fig. 6 is the spherical aberration curve graph of optical imaging lens in the embodiment of the present invention 2；
Fig. 7 is a kind of schematic diagram for optical imaging lens that the embodiment of the present invention 3 provides；
Fig. 8 is the perturbed field diagram of optical imaging lens in the embodiment of the present invention 3；
Fig. 9 is the spherical aberration curve graph of optical imaging lens in the embodiment of the present invention 3；
Figure 10 is a kind of schematic diagram for optical imaging lens that the embodiment of the present invention 4 provides；
Figure 11 is the perturbed field diagram of optical imaging lens in the embodiment of the present invention 4；
Figure 12 is the spherical aberration curve graph of optical imaging lens in the embodiment of the present invention 4；
Figure 13 is a kind of schematic diagram for optical imaging lens that the embodiment of the present invention 5 provides；
Figure 14 is the perturbed field diagram of optical imaging lens in the embodiment of the present invention 5；
Figure 15 is the spherical aberration curve graph of optical imaging lens in the embodiment of the present invention 5；
Figure 16 is a kind of schematic diagram for optical imaging lens that the embodiment of the present invention 6 provides；
Figure 17 is the perturbed field diagram of optical imaging lens in the embodiment of the present invention 6；
Figure 18 is the spherical aberration curve graph of optical imaging lens in the embodiment of the present invention 6；
Figure 19 is a kind of schematic diagram for optical imaging lens that the embodiment of the present invention 7 provides；
Figure 20 is the perturbed field diagram of optical imaging lens in the embodiment of the present invention 7；
Figure 21 is the spherical aberration curve graph of optical imaging lens in the embodiment of the present invention 7；
Figure 22 is painted YC in the optical imaging lens according to the embodiment of the present invention 182And SAG82Schematic diagram；
Figure 23 is painted YC in the optical imaging lens according to the embodiment of the present invention 172And SAG72Schematic diagram.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to protection of the present invention
Range.
The embodiment of the present invention provides a kind of optical imaging lens, including set gradually by object side to image side the first lens,
Second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th lens, each lens have
It further include an imaging surface for being located at the 8th lens image side towards the object side of object space and towards the image side surface of image space, with
And one be set to infrared fileter between the 8th lens and imaging surface, which does not influence optical imaging lens
Focal length.
First lens have positive refracting power, and object side can be convex surface at dipped beam axis, can adjust the lens
Positive refracting power configuration, facilitates the total length for shortening imaging lens, and the image side surface of the first lens can be concave surface, energy at dipped beam axis
Enough adjust low order aberration.Second lens have negative refracting power, are conducive to make corrections to the aberration that the first lens generate.
The third lens have positive refracting power, then can effectively distribute the refracting power of the first lens, help to reduce imaging
The susceptibility of camera lens.The third lens object side can be convex surface at dipped beam axis, and image side surface can be concave surface at dipped beam axis and can
With at least one point of inflexion, the marginal ray for facilitating big visual angle can smoothly converge to imaging surface, also can avoid the face periphery
Face type be too bent and cause be imaged or manufacture on problem.
4th lens, the 5th lens, the 6th lens, the 7th lens be respectively provided with positive refracting power or
The negative refracting power of person, can appropriately configured optical imaging lens refracting power distribution, aberration can be corrected and expand field angle.It is described
7th lens object side at dipped beam axis for convex surface and by dipped beam axis to edge there are the variation that convex surface turns concave surface, image side surface in
For concave surface and by dipped beam axis to edge there are the variation that concave surface turns convex surface at dipped beam axis, be conducive to the height for correcting optical imaging lens
Rank aberration promotes its resolving power to obtain good image quality.
8th lens have negative refracting power, and image side surface is concave surface at dipped beam axis, help to make optical imaging lens
The principal point of head effectively far from imaging surface, to reinforce shortening its back focal length, and then can reduce the total length of optical imaging lens, reach
The purpose of miniaturization；In addition, the image side surface of the 8th lens has at least one point of inflexion, the light of off-axis visual field can be effectively suppressed
Line is incident in the angle on Image Sensor, preferably the aberration of modified off-axis visual field.
The positive and negative distribution of refracting power by rationally controlling each lens in imaging lens, can effectively balance control system
Low order aberration, and the tolerance sensitivity of system can be reduced, advantageously ensure that the miniaturization of imaging lens.The optical imaging lens
Interval can be all had between arbitrary two adjacent lens, is conducive to the assembling of lens, to promote manufacturing yield.
This optical imaging lens passes through the focal length, Entry pupil diameters and maximum image height of reasonable distribution optical imaging lens,
Meet condition | (f/EPD-Imgh)/(f/EPD+Imgh) | < 1, it can make optical imaging lens while with large aperture characteristic
High pixel is had both, so as to increase the light passing amount of imaging lens, enhances the illumination of imaging surface, while edge view can also be reduced
Aberration, realize the imaging effect of the big image planes of camera lens, optical imaging lens made to possess higher optical property and preferable
Processing technology.Therefore, optical imaging lens disclosed by the invention, lens length is shorter, and can have large aperture and excellent
Field of view angle, and good image quality can be reached, can satisfy application requirement.
Preferably, this optical imaging lens also satisfies the following conditional expression: -0.1 < SD12-SD22< 0.20, wherein SD12It indicates
The effective radius of the first lens image side surface, SD22Indicate the effective radius of the second lens image side surface.By saturating to first
The rational design of the image side surface effective radius of mirror and the second lens can keep system while minimizing camera lens head
The big image height of system can satisfy the structural requirement of comprehensive screen equipment to guarantee high pixel.The camera lens if above-mentioned ratio is more than lower limit
Head will be excessive, do not meet the camera lens head Miniaturization Design standard shielded comprehensively, and if being more than the upper limit camera lens astigmatism, ball
The aberrations such as difference can become poor, not be able to satisfy image quality requirement.
Preferably, this optical imaging lens also satisfies the following conditional expression: 0.2 < YC82/ f < 0.9, YC82Indicate the described 8th
For the point of inflexion to the vertical range of optical axis, f indicates the focal length of the optical imaging lens on lens image side surface.It whereby, can be effectively
The light for suppressing off-axis visual field is incident in angle on Image Sensor, promotes the response efficiency of photosensitive element, Jin Erti
Rise image quality.
Preferably, this optical imaging lens also satisfies the following conditional expression: -1 < CT6*TAN(HFOV)/f6< 1, wherein CT6Table
Show the 6th lens in the thickness on optical axis, HFOV indicates the half at optical imaging lens maximum field of view angle, f6It indicates
The focal length of 6th lens.By meeting above-mentioned relation, it is capable of the thickness and optical imaging lens of the 6th lens of reasonable distribution
Field angle, the imaging effect of the big image planes of imaging lens may be implemented, make its possess higher optical property and it is preferable plus
Work technique.
Preferably, this optical imaging lens also satisfies the following conditional expression: 0 < ACT/f < 2, and wherein ACT indicates that described first is saturating
To each lens of the 8th lens, the sum of the thickness on optical axis, f indicate the focal length of the optical imaging lens to mirror respectively.Pass through
The thickness of appropriate adjustment lens facilitates eyeglass production and molding, can promote manufacturing yield, and meets conditional setting model
It encloses, facilitates the total length for shortening optical imaging lens, its miniaturization is maintained to be applied to portable electronic product with benefit.
Preferably, this optical imaging lens also satisfies the following conditional expression: | f1/f2| < 2, f1Indicate the coke of first lens
Away from f2Indicate the focal length of second lens.By the flexion for rationally controlling optical imaging system the first lens and the second lens
Power can balance the refracting power distribution of imaging lens front end, reduce the generation of aberration.
Preferably, this optical imaging lens also satisfies the following conditional expression: | R61/R62|≤5, wherein R61Indicate the described 6th
The radius of curvature of lens object side, R62Indicate the radius of curvature of the 6th lens image side surface.By controlling the 6th lens object side
The radius of curvature in face and image side surface, can efficiently control the 6th power of lens, and setting in this way has the of contrary flexure point design
Six lens radius of curvature are in zone of reasonableness, can avoid too small or excessive and cause shape shape bending in face excessive, to be difficult to
The possibility for forming or light being caused to be totally reflected.
Preferably, this optical imaging lens also satisfies the following conditional expression: 0.8 < SD82/ EPD < 2, SD82Indicate the described 8th
The effective radius of lens image side surface, EPD indicate the Entry pupil diameters of the optical imaging lens.Meeting this condition can suitably remain outer
The light-inletting quantity of diameter size and improving optical imaging lens facilitates the miniaturization for maintaining out imaging lens and meets large aperture need
It asks.
Preferably, this optical imaging lens also satisfies the following conditional expression: 0.5 < YC72/YC82< 1.5, YC72Indicate described
Vertical range of the point of inflexion to optical axis, YC on seven lens image side surfaces82Indicate on the 8th lens image side surface point of inflexion to optical axis
Vertical range.Ray height can effectively be promoted by meeting this condition, meet the requirement of the high pixel of imaging system, and keep light inclined
Folding tends to mitigate, and the susceptibility of imaging lens can be effectively reduced, while can effectively correct coma, distortion and the color of imaging system
Difference.
Preferably, this optical imaging lens also satisfies the following conditional expression: -1 < f/R62+f/R71< 1, f indicate the optics at
As the focal length of camera lens, R62Indicate the radius of curvature of the 6th lens image side surface, R71Indicate the song of the 7th lens object side
Rate radius.It is configured by the curvature of the 6th lens of reasonable distribution and the 7th lens, facilitates the susceptibility of reduction imaging lens simultaneously
And promote manufacturing yield.
Preferably, this optical imaging lens also satisfies the following conditional expression: 0 < CT1/CT2≤ 5, CT1Indicate first lens
In the thickness on optical axis, CT2Indicate second lens in the thickness on optical axis.Meeting this condition makes the first lens and second thoroughly
The thickness of mirror is more appropriate, facilitates homogenieity and mouldability of the eyeglass in production to promote manufacturing yield.
Preferably, this optical imaging lens also satisfies the following conditional expression: | SAG72/SAG81| < 4, SAG72Indicate the described 7th
The intersection point of lens image side surface and optical axis is to the maximum effective radius position of the 7th lens image side surface in the horizontal displacement of optical axis
Amount, SAG81Indicate the intersection point of the 8th lens object side and optical axis to the maximum effective radius position of the 8th lens object side
It is placed in the horizontal displacement of optical axis.Change by adjusting the 7th lens image side surface and the face type of the 8th lens object side, may help to
It mitigates imaging lens image side end light trend and its is incident in the angle of imaging surface, so as to effectively promoting imaging surface illumination, into one
Step promotes imaging resolution and image quality.
Preferably, this optical imaging lens also satisfies the following conditional expression: 0 < T67/CT6≤ 1, T67Indicate the 6th lens
With the 7th lens in the airspace distance on optical axis, CT6Indicate the 6th lens in the thickness on optical axis.Meet this
Condition can balance the 6th lens thickness, and make have sufficient space mitigation optical path between the 6th lens and the 7th lens, to avoid production
Raw excessive aberration, while promoting its stability.
Preferably, this optical imaging lens also satisfies the following conditional expression: -2 < (R21+R22)/(R21-R22)≤5, R21It indicates
The radius of curvature of the second lens object side, R22Indicate the radius of curvature of the second lens image side surface.Whereby, it can adjust second thoroughly
The face shape of mirror with modified off-axis aberration, and allows light that can have incident and shooting angle appropriate in the second lens, helps to increase
The area of imaging surface reduces the outer diameter of camera lens front lens.
It should be noted that refracting power refers to directional light by optical system, deviation can occur for the direction of propagation of light, use
In characterization optical system to the flexion ability of incoming parallel beam.Optical system has positive refracting power, shows the flexion to light
It is convergence property；Optical system has negative refracting power, shows that the flexion of light be diversity.In optics provided by the invention
In imaging lens, if the refracting power or focal length of lens do not define its regional location, then it represents that the refracting power or focal length of the lens
It can be refracting power or focal length of the lens at dipped beam axis.
It arranges for lens each in optical imaging lens, in the case where being from the object side to image side from left to right, lens object
Side is that convex surface refers to that section is done at lens object side any point Guo Mianshang, and total surface is in the right of section, radius of curvature
It is positive, on the contrary object side is then concave surface, and radius of curvature is negative.Lens image side surface is that convex surface refers to that lens image side surface crosses face and takes up an official post
Meaning a little does section, and total surface is on the left side of section, and radius of curvature is negative, otherwise image side surface is concave surface, radius of curvature
It is positive.If crossing any point on lens object side or image side surface does section, the existing part on the section left side in surface, and has
Part on the right of section, then there are the points of inflexion on the surface.Lens object side, image side surface dipped beam axis at concave-convex judgement it is still suitable
With above-mentioned.In optical imaging lens provided by the invention, if lens surface is convex surface and does not define the convex surface position, table
Show that the convex surface can be located at lens surface dipped beam axis；If lens surface is concave surface and does not define the concave surface position, then it represents that should
Concave surface can be located at lens surface dipped beam axis.
In optical imaging lens disclosed by the invention, the materials of lens can be plastics, can be effective when lens material is plastics
Reduce production cost.In addition, the object side of each lens and image side surface can be aspherical (ASP), it is aspherical to be easy to be fabricated to
Shape other than spherical surface obtains more controlled variable, to cut down aberration, and then reduces the number that lens use, therefore can
The total length of this optical imaging lens is effectively reduced.
In addition, an at least diaphragm settable on demand is facilitated in optical imaging lens of the present invention with reducing stray light
Promote image quality.In the present invention, aperture configuration can be preposition aperture, i.e., aperture be set to object and the first lens it
Between.The preposition setting of aperture can make the outgoing pupil of optical imaging lens and imaging surface generate longer distance, make it have remote
Heart effect, and the CCD or CMOS that can increase electronics photosensitive element receive the efficiency of image.
Optical imaging lens of the present invention are described in detail with specific embodiment below.It should be noted that not rushing
In the case where prominent, the features in the embodiments and the embodiments of the present application be can be combined with each other.Below with reference to the accompanying drawings and combine
Embodiment is described in detail the application.
[embodiment 1]
Referring to FIG. 1, the schematic diagram of the optical imaging lens provided for the embodiment of the present invention 1.As seen from the figure, the present embodiment
Optical imaging lens include the first lens 11 set gradually along optical axis by object side to image side, the second lens 12, the third lens 13,
4th lens 14, the 5th lens 15, the 6th lens 16, the 7th lens 17 and the 8th lens 18, each lens have towards object space
Object side and image side surface towards image space.First lens 11 have positive refracting power, and object side is at dipped beam axis
Convex surface, image side surface are concave surface at dipped beam axis.Second lens 12 have negative refracting power, and object side is at dipped beam axis
Concave surface, image side surface are concave surface at dipped beam axis.The third lens 13 have positive refracting power, and object side is at dipped beam axis
Convex surface, image side surface are concave surface at dipped beam axis.4th lens 14 have negative refracting power, and object side is at dipped beam axis
Concave surface, image side surface are concave surface at dipped beam axis.5th lens 15 have positive refracting power, and object side is at dipped beam axis
Convex surface, image side surface are concave surface at dipped beam axis.6th lens 16 have negative refracting power, and object side is at dipped beam axis
Concave surface, image side surface are convex surface at dipped beam axis.7th lens 17 have positive refracting power, and object side is at dipped beam axis
Convex surface, image side surface is concave surface at dipped beam axis, and its image side surface has at least one point of inflexion.8th lens 18 have
Negative refracting power, object side are convex surface at dipped beam axis, and image side surface is concave surface at dipped beam axis, and image side surface has at least one
A point of inflexion.The present embodiment optical imaging lens are provided with aperture 10 towards object space side in the first lens 11.In the 8th lens
It is provided with infrared fileter 19 between 18 and imaging surface, is filtered out by infrared fileter 19 into the infrared waves in optical lens group
Duan Guang avoids generating noise on Infrared irradiation to sensitive chip.Optional optical filter material is glass and does not influence focal length.
The value that the present embodiment optical imaging lens meet conditional is as shown in table 8.In addition, Figure 22 and Figure 23 are please referred to, the
Vertical range YC of the point of inflexion to optical axis on eight lens, 18 image side surface82As shown in figure 22,18 image side surface of the 8th lens and optical axis
Intersection point is to the maximum effective radius position of the 8th lens image side surface in the horizontal displacement distance SAG on optical axis82As shown in figure 22,
Vertical range YC of the point of inflexion to optical axis on seven lens, 17 image side surface72As shown in figure 23,17 image side surface of the 7th lens and optical axis
Intersection point is to the maximum effective radius position of the 7th lens image side surface in the horizontal displacement distance SAG on optical axis72As shown in figure 23.
The structural parameters of each lens of the present embodiment optical imaging lens are specific as shown in table 1-1, table mean curvature radius, thickness
And the unit of focal length is mm, f is the focal length of optical imaging system, and Fno is f-number, and FOV is maximum field of view angle, and surface 1-20
Successively indicate that wherein surface 1-17 successively indicates aperture, the first lens object side, the first lens picture by each surface in object side to image side
Side, the second lens object side, the second lens image side surface, the third lens object side, the third lens image side surface, the 4th lens object side
Face, the 4th lens image side surface, the 5th lens object side, the 5th lens image side surface, the 6th lens object side, the 6th lens image side
Face, the 7th lens object side, the 7th lens image side surface, the 8th lens object side and the 8th lens image side surface.
Table 1-1
Each lens use aspheric design in this optical imaging lens, and aspherical fitting equation is expressed as follows:
Wherein, X indicate aspherical on be Y apart from optical axis point, and be tangential on the section on vertex on aspherical optical axis
Relative distance；R indicates radius of curvature；Y indicates the vertical range of point and optical axis in aspheric curve；K indicates circular cone coefficient；Ai
Indicate the i-th rank asphericity coefficient.
For the asphericity coefficient of each lens of the present embodiment as shown in table 1-2, k indicates the circular cone system in aspheric curve equation
Number, A4-A16 respectively indicate lens surface 4-16 rank asphericity coefficient.The perturbed field diagram of the present embodiment optical imaging lens
And spherical aberration curve graph difference is as shown in Figures 2 and 3, wherein a length of 0.555 μm of perturbed field diagram medium wave, spherical aberration curve graph medium wave
A length of 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm and 0.650 μm.Following embodiment table is corresponding each embodiment
Optical imaging lens schematic diagram, the distortion curvature of field and spherical aberration curve graph, in table data define all with the table 1-1 of embodiment 1 and
The definition of table 1-2 is identical.
Table 1-2
[embodiment 2]
Referring to FIG. 4, the schematic diagram of the optical imaging lens provided for the embodiment of the present invention 2.As seen from the figure, the present embodiment
Optical imaging lens include the first lens 21 set gradually along optical axis by object side to image side, the second lens 22, the third lens 23,
4th lens 24, the 5th lens 25, the 6th lens 26, the 7th lens 27 and the 8th lens 28, each lens have towards object space
Object side and image side surface towards image space.First lens 21 have positive refracting power, and object side is at dipped beam axis
Convex surface, image side surface are concave surface at dipped beam axis.Second lens 22 have negative refracting power, and object side is at dipped beam axis
Convex surface, image side surface are concave surface at dipped beam axis.The third lens 23 have positive refracting power, and object side is at dipped beam axis
Convex surface, image side surface are concave surface at dipped beam axis.4th lens 24 have negative refracting power, and object side is at dipped beam axis
Concave surface, image side surface are concave surface at dipped beam axis.5th lens 25 have positive refracting power, and object side is at dipped beam axis
Convex surface, image side surface are concave surface at dipped beam axis.6th lens 26 have negative refracting power, and object side is at dipped beam axis
Concave surface, image side surface are convex surface at dipped beam axis.7th lens 27 have positive refracting power, and object side is at dipped beam axis
Convex surface, image side surface is concave surface at dipped beam axis, and its image side surface has at least one point of inflexion.8th lens 28 have
Negative refracting power, object side are convex surface at dipped beam axis, and image side surface is concave surface at dipped beam axis, and image side surface has at least one
A point of inflexion.The present embodiment optical imaging lens are provided with aperture 20 towards object space side in the first lens 21.In the 8th lens
It is provided with infrared fileter 29 between 28 and imaging surface, is filtered out by infrared fileter 29 into the infrared waves in optical lens group
Duan Guang avoids generating noise on Infrared irradiation to sensitive chip.Optional optical filter material is glass and does not influence focal length.
It please cooperate referring to following table 2-1, table 2-2 and table 8.Corresponding perturbed field diagram and spherical aberration curve graph are respectively such as
Shown in Fig. 5 and Fig. 6.
Table 2-1
Table 2-2
[embodiment 3]
Referring to FIG. 7, the schematic diagram of the optical imaging lens provided for the embodiment of the present invention 3.As seen from the figure, the present embodiment
Optical imaging lens include the first lens 31 set gradually along optical axis by object side to image side, the second lens 32, the third lens 33,
4th lens 34, the 5th lens 35, the 6th lens 36, the 7th lens 37 and the 8th lens 38, each lens have towards object space
Object side and image side surface towards image space.First lens 31 have positive refracting power, and object side is at dipped beam axis
Convex surface, image side surface are concave surface at dipped beam axis.Second lens 32 have negative refracting power, and object side is at dipped beam axis
Concave surface, image side surface are concave surface at dipped beam axis.The third lens 33 have positive refracting power, and object side is at dipped beam axis
Convex surface, image side surface are concave surface at dipped beam axis.4th lens 34 have negative refracting power, and object side is at dipped beam axis
Concave surface, image side surface are concave surface at dipped beam axis.5th lens 35 have positive refracting power, and object side is at dipped beam axis
Convex surface, image side surface are concave surface at dipped beam axis.6th lens 36 have negative refracting power, and object side is at dipped beam axis
Concave surface, image side surface are convex surface at dipped beam axis.7th lens 37 have positive refracting power, and object side is at dipped beam axis
Convex surface, image side surface is concave surface at dipped beam axis, and its image side surface has at least one point of inflexion.8th lens 38 have
Negative refracting power, object side are convex surface at dipped beam axis, and image side surface is concave surface at dipped beam axis, and image side surface has at least one
A point of inflexion.The present embodiment optical imaging lens are provided with aperture 30 towards object space side in the first lens 31.In the 8th lens
It is provided with infrared fileter 39 between 38 and imaging surface, is filtered out by infrared fileter 39 into the infrared waves in optical lens group
Duan Guang avoids generating noise on Infrared irradiation to sensitive chip.Optional optical filter material is glass and does not influence focal length.
It please cooperate referring to following table 3-1, table 3-2 and table 8.Corresponding perturbed field diagram and spherical aberration curve graph are respectively such as
Shown in Fig. 8 and Fig. 9.
Table 3-1
Table 3-2
[embodiment 4]
Referring to FIG. 10, the schematic diagram of the optical imaging lens provided for the embodiment of the present invention 4.As seen from the figure, this implementation
Example optical imaging lens include the first lens 41, the second lens 42, the third lens set gradually along optical axis by object side to image side
43, the 4th lens 44, the 5th lens 45, the 6th lens 46, the 7th lens 47 and the 8th lens 48, each lens have towards object
Square object side and the image side surface towards image space.First lens 41 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.Second lens 42 have negative refracting power, and object side is at dipped beam axis
For concave surface, image side surface is concave surface at dipped beam axis.The third lens 43 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.4th lens 44 have negative refracting power, and object side is at dipped beam axis
For concave surface, image side surface is concave surface at dipped beam axis.5th lens 45 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.6th lens 46 have negative refracting power, and object side is at dipped beam axis
For concave surface, image side surface is convex surface at dipped beam axis.7th lens 47 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis, and its image side surface has at least one point of inflexion.8th lens 48 tool
There is negative refracting power, object side is convex surface at dipped beam axis, and image side surface is concave surface at dipped beam axis, and image side surface has at least
One point of inflexion.The present embodiment optical imaging lens are provided with aperture 40 towards object space side in the first lens 41.Thoroughly the 8th
It is provided with infrared fileter 49 between mirror 48 and imaging surface, is filtered out by infrared fileter 49 into infrared in optical lens group
Band of light avoids generating noise on Infrared irradiation to sensitive chip.Optional optical filter material is glass and does not influence focal length.
It please cooperate referring to following table 4-1, table 4-2 and table 8.Corresponding perturbed field diagram and spherical aberration curve graph are respectively such as
Shown in Figure 11 and Figure 12.
Table 4-1
Table 4-2
[embodiment 5]
Figure 13 is please referred to, for the schematic diagram for the optical imaging lens that the embodiment of the present invention 5 provides.As seen from the figure, this implementation
Example optical imaging lens include the first lens 51, the second lens 52, the third lens set gradually along optical axis by object side to image side
53, the 4th lens 54, the 5th lens 55, the 6th lens 56, the 7th lens 57 and the 8th lens 58, each lens have towards object
Square object side and the image side surface towards image space.First lens 51 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.Second lens 52 have negative refracting power, and object side is at dipped beam axis
For concave surface, image side surface is concave surface at dipped beam axis.The third lens 53 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.4th lens 54 have negative refracting power, and object side is at dipped beam axis
For concave surface, image side surface is concave surface at dipped beam axis.5th lens 55 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.6th lens 56 have negative refracting power, and object side is at dipped beam axis
For concave surface, image side surface is convex surface at dipped beam axis.7th lens 57 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis, and its image side surface has at least one point of inflexion.8th lens 58 tool
There is negative refracting power, object side is convex surface at dipped beam axis, and image side surface is concave surface at dipped beam axis, and image side surface has at least
One point of inflexion.The present embodiment optical imaging lens are provided with aperture 50 towards object space side in the first lens 51.Thoroughly the 8th
It is provided with infrared fileter 59 between mirror 58 and imaging surface, is filtered out by infrared fileter 59 into infrared in optical lens group
Band of light avoids generating noise on Infrared irradiation to sensitive chip.Optional optical filter material is glass and does not influence focal length.
It please cooperate referring to following table 5-1, table 5-2 and table 8.Corresponding perturbed field diagram and spherical aberration curve graph are respectively such as
Shown in Figure 14 and Figure 15.
Table 5-1
Table 5-2
[embodiment 6]
Figure 16 is please referred to, for the schematic diagram for the optical imaging lens that the embodiment of the present invention 6 provides.As seen from the figure, this implementation
Example optical imaging lens include the first lens 61, the second lens 62, the third lens set gradually along optical axis by object side to image side
63, the 4th lens 64, the 5th lens 65, the 6th lens 66, the 7th lens 67 and the 8th lens 68, each lens have towards object
Square object side and the image side surface towards image space.First lens 61 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.Second lens 62 have negative refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.The third lens 63 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.4th lens 64 have negative refracting power, and object side is at dipped beam axis
For concave surface, image side surface is concave surface at dipped beam axis.5th lens 65 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.6th lens 66 have negative refracting power, and object side is at dipped beam axis
For concave surface, image side surface is convex surface at dipped beam axis.7th lens 67 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis, and its image side surface has at least one point of inflexion.8th lens 68 tool
There is negative refracting power, object side is convex surface at dipped beam axis, and image side surface is concave surface at dipped beam axis, and image side surface has at least
One point of inflexion.The present embodiment optical imaging lens are provided with aperture 60 towards object space side in the first lens 61.Thoroughly the 8th
It is provided with infrared fileter 69 between mirror 68 and imaging surface, is filtered out by infrared fileter 69 into infrared in optical lens group
Band of light avoids generating noise on Infrared irradiation to sensitive chip.Optional optical filter material is glass and does not influence focal length.
It please cooperate referring to following table 6-1, table 6-2 and table 8.Corresponding perturbed field diagram and spherical aberration curve graph are respectively such as
Shown in Figure 17 and Figure 18.
Table 6-1
Table 6-2
[embodiment 7]
Figure 19 is please referred to, for the schematic diagram for the optical imaging lens that the embodiment of the present invention 7 provides.As seen from the figure, this implementation
Example optical imaging lens include the first lens 71, the second lens 72, the third lens set gradually along optical axis by object side to image side
73, the 4th lens 74, the 5th lens 75, the 6th lens 76, the 7th lens 77 and the 8th lens 78, each lens have towards object
Square object side and the image side surface towards image space.First lens 71 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.Second lens 72 have negative refracting power, and object side is at dipped beam axis
For concave surface, image side surface is convex surface at dipped beam axis.The third lens 73 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.4th lens 74 have negative refracting power, and object side is at dipped beam axis
For concave surface, image side surface is concave surface at dipped beam axis.5th lens 75 have positive refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.6th lens 76 have positive refracting power, and object side is at dipped beam axis
For concave surface, image side surface is convex surface at dipped beam axis.7th lens 77 have negative refracting power, and object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis, and its image side surface has at least one point of inflexion.8th lens 78 tool
There is negative refracting power, object side is convex surface at dipped beam axis, and image side surface is concave surface at dipped beam axis, and image side surface has at least
One point of inflexion.The present embodiment optical imaging lens are provided with aperture 70 towards object space side in the first lens 71.Thoroughly the 8th
It is provided with infrared fileter 79 between mirror 78 and imaging surface, is filtered out by infrared fileter 79 into infrared in optical lens group
Band of light avoids generating noise on Infrared irradiation to sensitive chip.Optional optical filter material is glass and does not influence focal length.
It please cooperate referring to following table 7-1, table 7-2 and table 8.Corresponding perturbed field diagram and spherical aberration curve graph are respectively such as
Shown in Figure 20 and Figure 21.
Table 7-1
Table 7-2
To sum up, embodiment 1 to embodiment 7 meets relationship shown in table 8 respectively.
Table 8
Correspondingly, the embodiment of the present invention also provides a kind of electronic equipment, including photographic device, the photographic device includes electricity
Sub- photosensitive element and above-described optical imaging lens, the electronics photosensitive element be set to the optical imaging lens at
Image planes.
Electronic equipment provided in this embodiment, the optical imaging lens that photographic device uses for eight chip lens arrangements,
By each power of lens of reasonable distribution, face type, each lens center thickness and each lens between axis on spacing etc., make
It is shorter to obtain above-mentioned optical imaging lens length, and there is large aperture and excellent field of view angle, and good imaging can be reached
Quality can satisfy application requirement.
Optical imaging lens provided by the present invention and electronic equipment are described in detail above.It is used herein
A specific example illustrates the principle and implementation of the invention, and the above embodiments are only used to help understand originally
The method and its core concept of invention.It should be pointed out that for those skilled in the art, not departing from this hair
, can be with several improvements and modifications are made to the present invention under the premise of bright principle, these improvement and modification also fall into power of the present invention
In the protection scope that benefit requires.
Claims (14)
1. a kind of optical imaging lens, which is characterized in that including set gradually by object side to image side the first lens, second thoroughly
Mirror, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th lens, each lens have towards object
Square object side and the image side surface towards image space, in which:
First lens and the third lens all have positive refracting power, and second lens and the 8th lens all have
Negative refracting power, the 4th lens, the 5th lens, the 6th lens and the 7th lens are respectively provided with positive refracting power
Or negative refracting power；The first lens image side surface is concave surface at dipped beam axis, and the 4th lens object side is at dipped beam axis
For concave surface, the 8th lens image side surface is concave surface at dipped beam axis, and its image side surface has at least one point of inflexion；
And it satisfies the following conditional expression:
|(f/EPD-Imgh)/(f/EPD+Imgh)|<1；
Wherein, f indicates that the focal length of the optical imaging lens, EPD indicate the Entry pupil diameters of the optical imaging lens, Imgh table
Show the half of the maximum image height of the optical imaging lens.
2. optical imaging lens according to claim 1, which is characterized in that the 7th lens object side is at dipped beam axis
For convex surface, image side surface is concave surface at dipped beam axis.
3. optical imaging lens according to claim 1, which is characterized in that also satisfy the following conditional expression: -0.1 < SD12-
SD22< 0.20, wherein SD12Indicate the effective radius of the first lens image side surface, SD22Indicate the second lens image side surface
Effective radius.
4. optical imaging lens according to claim 1, which is characterized in that also satisfy the following conditional expression: 0.2 < YC82/f<
0.9, YC82The point of inflexion on the 8th lens image side surface is indicated to the vertical range of optical axis, f indicates the optical imaging lens
Focal length.
5. optical imaging lens according to claim 1, which is characterized in that also satisfy the following conditional expression: -1 < CT6*TAN
(HFOV)/f6< 1, wherein CT6The 6th lens are indicated in the thickness on optical axis, HFOV indicates that the optical imaging lens are maximum
The half of field angle, f6Indicate the focal length of the 6th lens.
6. optical imaging lens according to claim 1, which is characterized in that also satisfy the following conditional expression: 0 < ACT/f < 2,
Wherein ACT indicates that the sum of the thickness on optical axis, f indicate the light to first lens respectively to each lens of the 8th lens
Learn the focal length of imaging lens.
7. optical imaging lens according to claim 1, which is characterized in that also satisfy the following conditional expression: | f1/f2| < 2, f1
Indicate the focal length of first lens, f2Indicate the focal length of second lens.
8. optical imaging lens according to claim 1, which is characterized in that also satisfy the following conditional expression: | R61/R62|≤5,
Wherein R61Indicate the radius of curvature of the 6th lens object side, R62Indicate the radius of curvature of the 6th lens image side surface.
9. optical imaging lens according to claim 1, which is characterized in that also satisfy the following conditional expression: 0.8 < SD82/EPD
< 2, SD82Indicate that the effective radius of the 8th lens image side surface, EPD indicate the Entry pupil diameters of the optical imaging lens.
10. optical imaging lens according to claim 1, which is characterized in that also satisfy the following conditional expression: 0.5 < YC72/
YC82< 1.5, YC72Indicate vertical range of the point of inflexion to optical axis, YC on the 7th lens image side surface82Indicate that the described 8th is saturating
Vertical range of the point of inflexion to optical axis on mirror image side.
11. optical imaging lens according to claim 1, which is characterized in that also satisfy the following conditional expression: | SAG72/SAG81
| < 4, SAG72Indicate the intersection point of the 7th lens image side surface and optical axis to the maximum effective radius of the 7th lens image side surface
Position is in the horizontal displacement distance of optical axis, SAG81Indicate the intersection point of the 8th lens object side and optical axis to the 8th lens
The maximum effective radius position of object side is in the horizontal displacement distance of optical axis.
12. optical imaging lens according to claim 1, which is characterized in that also satisfy the following conditional expression: 0 < T67/CT6≤
1, T67Indicate the 6th lens and the 7th lens in the airspace distance on optical axis, CT6Indicate the 6th lens
In the thickness on optical axis.
13. optical imaging lens according to claim 1, which is characterized in that also satisfy the following conditional expression: -2 < (R21+
R22)/(R21-R22)≤5, R21Indicate the radius of curvature of the second lens object side, R22Indicate the song of the second lens image side surface
Rate radius.
14. a kind of electronic equipment, which is characterized in that including photographic device, the photographic device includes electronics photosensitive element and power
Benefit requires the described in any item optical imaging lens of 1-13, the electronics photosensitive element be set to the optical imaging lens at
Image planes.
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