CN105739060A - Optical imaging lens group, image capturing device and electronic device - Google Patents
Optical imaging lens group, image capturing device and electronic device Download PDFInfo
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- CN105739060A CN105739060A CN201410756349.8A CN201410756349A CN105739060A CN 105739060 A CN105739060 A CN 105739060A CN 201410756349 A CN201410756349 A CN 201410756349A CN 105739060 A CN105739060 A CN 105739060A
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Abstract
The invention discloses an optical imaging lens group, an image capturing device and an electronic device. The optical imaging lens group comprises, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens and a fifth lens which have refraction power. The first lens has positive refraction power and an object side surface, close to an optical axis, of the first lens is a convex surface. The second lens has positive refraction power and an object side surface, close to an optical axis, of the second lens is a convex surface. The third lens has refraction power. The fourth lens has positive refraction power; an object side surface, close to an optical axis, of the fourth lens is a convex surface; an image side surface close to the optical axis is a convex surface; and the object side surface and image side surface are both aspheric surfaces. The fifth lens has negative refraction power; an object side surface, close to an optical axis, of the fifth lens is a concave surface; an image side surface close to the optical axis is a concave surface; the image side surface, away from the axis, is provided with a convex surface; the object side surface and the image side surface are both aspheric surfaces. Any two of the above adjacent lenses are spaced by air. The invention also discloses an image capturing device provided with the optical imaging lens group and an electronic device provided with the image capturing device.
Description
Technical field
The present invention relates to a kind of optical imaging lens group, image-taking device and electronic installation, particularly relate to a kind of optical imaging lens group suitable in electronic installation and image-taking device.
Background technology
In recent years, flourish along with miniaturization photographic lens, the demand of minisize image acquisition module day by day improves, and generally the photo-sensitive cell of photographic lens is nothing more than being photosensitive coupling element (ChargeCoupledDevice, or Complimentary Metal-Oxide semiconductor element (ComplementaryMetal-OxideSemiconductorSensor CCD), CMOSSensor) two kinds, and progressing greatly along with semiconductor process technique, the Pixel Dimensions making photo-sensitive cell reduces, add electronic product now with the good and compact external form of function for development trend, therefore, the miniaturization photographic lens possessing good image quality becomes main flow in the market.
Tradition is equipped on the high pixel miniaturization photographic lens on electronic installation, many employing quadruple lenses structures are main, but owing to the high standards such as high-order smart mobile phone (SmartPhone), Wearable device (WearableDevice), tablet PC (TabletPersonalComputer) and infrared photographic lens move the prevailing of device, driving the requirement in pixel with image quality of the miniaturization pick-up lens to promote, existing four-piece type lens group will be unable to meet the demand of higher order.
Although there being development generally traditional five chip optical systems at present, but the refracting power configuration inequality in existing optical system, the change in refraction easily making incident ray is excessive, and then allow image periphery easily produce veiling glare, and the back focal length also easily making optical system is long, it is unfavorable for the miniaturization of optical system.Further, it is possible to cause refracting power concentrations in single lens, and be an impediment to the sensitivity reducing optical system.
Summary of the invention
The present invention provides a kind of optical imaging lens group, image-taking device and electronic installation, wherein the first lens and the second lens all have positive refracting power, contribute to being uniformly distributed the receipts light ability of imaging lens group, effectively to slow down the change in refraction of incident ray, and then avoid image periphery to produce veiling glare.Additionally, the first lens and the second lens all have positive refracting power can effectively reduce the back focal length of optical imaging lens group, optical imaging lens group is made to maintain miniaturization.Additionally, when meeting specified conditions, the second lens have better suited positive refracting power, contribute to the positive refracting power of balance the first lens and avoid the positive refracting power of single lens excessively strong, effectively to reduce the sensitivity of optical imaging lens group.It addition, also can effectively slow down the change of shape of the 4th lens, to avoid the face reflection problems caused because change of shape is excessive, and reduce difficult forming degree.
The present invention provides a kind of optical imaging lens group, thing side to image side sequentially comprise the first lens, the second lens, the 3rd lens, the 4th lens and the 5th lens.First lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place.Second lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place.3rd lens have refracting power.4th lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place, and its surface, image side is convex surface in dipped beam axle place, and its thing side surface and surface, image side are all aspheric surface.5th lens have negative refracting power, and its thing side surface is concave surface in dipped beam axle place, and its surface, image side is concave surface in dipped beam axle place, and its surface, image side has at least one convex surface in off-axis place, and its thing side surface and surface, image side are all aspheric surface.The lens having refracting power in optical imaging lens group are five.First lens, the second lens, the 3rd lens, the 4th lens and the 5th lens are respectively provided with an airspace between wantonly two adjacent lens on optical axis.The focal length of optical imaging lens group is f, and the focal length of the first lens is f1, and the focal length of the second lens is f2, and the radius of curvature of the 4th lens thing side surface is R7, and the radius of curvature on the 4th surface, lens image side is R8, and it meets following condition:
0<f1/f2<2.0；And
-3.0<(f/R7)+(f/R8)。
The present invention separately provides a kind of optical imaging lens group, thing side to image side sequentially comprise the first lens, the second lens, the 3rd lens, the 4th lens and the 5th lens.First lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place.Second lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place.3rd lens have refracting power.4th lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place, and its surface, image side is convex surface in dipped beam axle place, and its thing side surface and surface, image side are all aspheric surface.5th lens have negative refracting power, and its thing side surface is concave surface in dipped beam axle place, and its surface, image side is concave surface in dipped beam axle place, and its surface, image side has at least one convex surface in off-axis place, and its thing side surface and surface, image side are all aspheric surface.The lens having refracting power in optical imaging lens group are five.First lens, the second lens, the 3rd lens, the 4th lens and the 5th lens are respectively provided with an airspace between wantonly two adjacent lens on optical axis.The focal length of the first lens is f1, and the focal length of the second lens is f2, and it meets following condition:
0<f1/f2<1.5。
The present invention reoffers a kind of optical imaging lens group, thing side to image side sequentially comprise the first lens, the second lens, the 3rd lens, the 4th lens and the 5th lens.First lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place.Second lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place.3rd lens have refracting power.4th lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place, and its surface, image side is convex surface in dipped beam axle place, and its thing side surface and surface, image side are all aspheric surface.5th lens have negative refracting power, and its thing side surface is concave surface in dipped beam axle place, and its surface, image side is concave surface in dipped beam axle place, and its surface, image side has at least one convex surface in off-axis place, and its thing side surface and surface, image side are all aspheric surface.The lens having refracting power in optical imaging lens group are five.First lens, the second lens, the 3rd lens, the 4th lens and the 5th lens are respectively provided with an airspace between wantonly two adjacent lens on optical axis.Optical imaging lens group also comprises a light-transmitting plate.When the focal length of the first lens is f1, the focal length of the second lens is f2, also comprising at least one light-transmitting plate between 5th lens and an imaging surface, the gross thickness on optical axis of the light-transmitting plate between the 5th surface, lens image side and imaging surface is FPCT, and it meets following condition:
0<f1/f2<1.5；And
FPCT < 0.275 millimeter (mm).
The present invention separately provides a kind of image-taking device, and it comprises aforesaid optical imaging lens group and sense electronics optical element, and wherein sense electronics optical element is arranged on the imaging surface of optical imaging lens group.
The present invention separately provides a kind of electronic installation, and it comprises aforesaid image-taking device.
When f1/f2 meets above-mentioned condition, the second lens have better suited positive refracting power, can the refracting power of more effective distribution the first lens and avoid refracting power own excessively strong, effectively to reduce the sensitivity of optical imaging lens group.
When (f/R7)+(f/R8) meets above-mentioned condition, can effectively slow down the change of shape of the 4th lens, to avoid the face reflection problems caused because change of shape is excessive, and reduce difficult forming degree.
When FPCT meets above-mentioned condition, the interference of non-essential light can be prevented effectively from, and contribute to maintaining the miniaturization of optical imaging lens group.
Accompanying drawing explanation
Fig. 1 illustrates image-taking device schematic diagram according to a first embodiment of the present invention；
Fig. 2 is sequentially the spherical aberration of first embodiment, astigmatism and distortion curve figure from left to right；
Fig. 3 illustrates image-taking device schematic diagram according to a second embodiment of the present invention；
Fig. 4 is sequentially the spherical aberration of the second embodiment, astigmatism and distortion curve figure from left to right；
Fig. 5 illustrates image-taking device schematic diagram according to a third embodiment of the present invention；
Fig. 6 is sequentially the spherical aberration of the 3rd embodiment, astigmatism and distortion curve figure from left to right；
Fig. 7 illustrates image-taking device schematic diagram according to a fourth embodiment of the present invention；
Fig. 8 is sequentially the spherical aberration of the 4th embodiment, astigmatism and distortion curve figure from left to right；
Fig. 9 illustrates image-taking device schematic diagram according to a fifth embodiment of the present invention；
Figure 10 is sequentially the spherical aberration of the 5th embodiment, astigmatism and distortion curve figure from left to right；
Figure 11 illustrates image-taking device schematic diagram according to a sixth embodiment of the present invention；
Figure 12 is sequentially the spherical aberration of sixth embodiment, astigmatism and distortion curve figure from left to right；
Figure 13 illustrates image-taking device schematic diagram according to a seventh embodiment of the present invention；
Figure 14 is sequentially the spherical aberration of the 7th embodiment, astigmatism and distortion curve figure from left to right；
Figure 15 illustrates image-taking device schematic diagram according to a eighth embodiment of the present invention；
Figure 16 is sequentially the spherical aberration of the 8th embodiment, astigmatism and distortion curve figure from left to right；
Figure 17 illustrates image-taking device schematic diagram according to a ninth embodiment of the present invention；
Figure 18 is sequentially the spherical aberration of the 9th embodiment, astigmatism and distortion curve figure from left to right；
Figure 19 illustrates the schematic diagram of a kind of electronic installation according to the present invention；
Figure 20 illustrates the schematic diagram of the another kind of electronic installation according to the present invention；
Figure 21 illustrates the schematic diagram of the still another electronic installation according to the present invention；
Figure 22 illustrates the schematic diagram of the still another electronic installation according to the present invention.
Accompanying drawing labelling
Image-taking device 10
Aperture 100,200,300,400,500,600,700,800,900
First lens 110,210,310,410,510,610,710,810,910
Thing side surface 111,211,311,411,511,611,711,811,911
Surface, image side 112,212,312,412,512,612,712,812,912
Second lens 120,220,320,420,520,620,720,820,920
Thing side surface 121,221,321,421,521,621,721,821,921
Surface, image side 122,222,322,422,522,622,722,822,922
3rd lens 130,230,330,430,530,630,730,830,930
Thing side surface 131,231,331,431,531,631,731,831,931
Surface, image side 132,232,332,432,532,632,732,832,932
4th lens 140,240,340,440,540,640,740,840,940
Thing side surface 141,241,341,441,541,641,741,841,941
Surface, image side 142,242,342,442,542,642,742,842,942
5th lens 150,250,350,450,550,650,750,850,950
Thing side surface 151,251,351,451,551,651,751,851,951
Surface, image side 152,252,352,452,552,652,752,852,952
Filter element 160,260,360,460,560,660,760,860,960
Imaging surface 170,270,370,470,570,670,770,870,970
Sense electronics optical element 180,280,380,480,580,680,780,880,980
BL: the five surface, lens image side is to imaging surface distance on optical axis
CT1: the first lens thickness on optical axis
CT2: the second lens thickness on optical axis
CT3: the three lens thickness on optical axis
CT4: the four lens thickness on optical axis
CT5: the five lens thickness on optical axis
EPD: the entrance pupil aperture of optical imaging lens group
The focal length of f optical imaging lens group
The focal length of the f1: the first lens
The focal length of the f2: the second lens
The focal length of the f4: the four lens
The focal length of the f5: the five lens
The f-number of Fno optical imaging lens group
The light-transmitting plate between FPCT: the five surface, lens image side and imaging surface gross thickness on optical axis
The half at maximum visual angle in HFOV optical imaging lens group
The radius of curvature of the R3: the second lens thing side surface
The radius of curvature of the R4: the second surface, lens image side
The radius of curvature of the R7: the four lens thing side surface
The radius of curvature of the R8: the four surface, lens image side
TL: the first lens thing side surface is to imaging surface distance on optical axis
The abbe number of the V2: the second lens
Detailed description of the invention
Optical imaging lens group is sequentially comprised the first lens, the second lens, the 3rd lens, the 4th lens and the 5th lens by thing side to image side.Wherein, the lens having refracting power in optical imaging lens group are five.
First lens, the second lens, the 3rd lens, the 4th lens and the 5th lens are respectively provided with between wantonly two adjacent lens an airspace on optical axis, that is the first lens, the second lens, the 3rd lens, the 4th lens and the 5th lens can be five single disengaged (non-adhering) and the lens of tool refracting power.Owing to the more disengaged lens of the technique of cemented lens are complicated, the curved surface of high accuracy need to be had especially, in order to reach high adaptation when two lens engage on the composition surface of two lens, and in the process engaged, more likely cause shifting axle defect because of off normal, the overall quality of optical imaging of impact.Therefore, the first lens in optical imaging lens group to the 5th lens can be the lens of five single disengaged tool refracting powers, and then is effectively improved problem produced by cemented lens.
First lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place.Whereby, it is possible to provide the positive refracting power needed for optical imaging lens group, and contribute to suitably adjust optical imaging lens group total length.
Second lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place.Whereby, the first lens and the second lens all have positive refracting power, contribute to being uniformly distributed the receipts light ability of imaging lens group, effectively to slow down the change in refraction of incident ray, and then avoid image periphery to produce veiling glare.Additionally, the back focal length of optical imaging lens group can effectively be reduced, optical imaging lens group is made to maintain miniaturization.
3rd lens have refracting power.Whereby, contribute to the aberration revising the first lens and the generation of the second lens, and the sensitivity of optical imaging lens group can be reduced.
4th lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place, and its surface, image side is convex surface in dipped beam axle place, and its thing side surface can have at least one point of inflexion in off-axis place.Whereby, the change of shape of the 4th lens be can effectively slow down, it is to avoid this lens shape changes the face reflection problems caused greatly very much, and can reduce difficult forming degree simultaneously, the spherical aberration of optical imaging lens group and the aberration of off-axis visual field effectively revised further.
5th lens have negative refracting power, and its thing side surface is concave surface in dipped beam axle place, and its surface, image side is concave surface in dipped beam axle place, and its surface, image side has at least one convex surface in off-axis place.Whereby, the principal point of optical imaging lens group can be made away from image side end, and then rear Jiao of shortening optical imaging lens group, it is beneficial to the miniaturization of optical imaging lens group.Additionally, the light of the off-axis visual field angle on photo-sensitive cell can be suppressed, to increase the receiving efficiency of image photo-sensitive cell, the aberration of further modified off-axis visual field.
The focal length of the first lens is f1, and the focal length of the second lens is f2, and it meets following condition: 0 < f1/f2 < 2.0.Whereby, it can be ensured that the second lens have better suited positive refracting power, can the refracting power of more effective distribution the first lens and avoid single lens refracting power excessively strong, effectively to reduce the sensitivity of optical imaging lens group.It is preferred that it meets following condition: 0 < f1/f2 < 1.5.
The focal length of optical imaging lens group is f, and the radius of curvature of the 4th lens thing side surface is R7, and the radius of curvature on the 4th surface, lens image side is R8, and it meets following condition :-3.0 < (f/R7)+(f/R8).Whereby, can effectively slow down the change of shape of the 4th lens, to avoid the face reflection problems caused because change of shape is excessive, and reduce difficult forming degree.It is preferred that it meets following condition :-2.0 < (f/R7)+(f/R8).More preferably, it meets following condition :-1.65 < (f/R7)+(f/R8).Again more preferably, it meets following condition :-1.5 < (f/R7)+(f/R8) <-0.25.
Optical imaging lens group can comprise at least one light-transmitting plate.Light-transmitting plate such as filters element or plate glass etc. for filter element, infrared ray.The light-transmitting plate between 5th surface, lens image side and imaging surface gross thickness on optical axis is FPCT, and it meets following condition: FPCT≤0.275 millimeter (mm).Whereby, the interference of non-essential light can be prevented effectively from, and contribute to maintaining the miniaturization of optical imaging lens group.
The radius of curvature of the second lens thing side surface is R3, and the radius of curvature on the second surface, lens image side is R4, and it meets following condition: 8.0 < | (R3+R4)/(R3-R4) |.Whereby, contribute to revising the astigmatism of optical imaging lens group, to promote image quality.
The entrance pupil aperture of optical imaging lens group is EPD, and second lens thickness on optical axis is CT2, and it meets following condition: 8.0 < EPD/CT2.Whereby, contribute to maintaining the enough light-inletting quantity of optical imaging lens group, it is to avoid the restriction of diffraction limit and higher resolving power can be obtained.
The focal length of the first lens is f1, and the focal length of the 4th lens is f4, and the focal length of the 5th lens is f5, and it meets following condition: (| f4 |+| f5 |)/| f1 | < 1.25.Whereby, can the refracting power configuration of balance optical imaging lens group, to avoid aberration excessively to produce, can effectively reduce the sensitivity of optical imaging lens group simultaneously.It is preferred that it meets following condition: (| f4 |+| f5 |)/| f1 | < 1.0.
Second lens thickness on optical axis is CT2, and the 3rd lens thickness on optical axis is CT3, and it meets following condition: 2.0 < CT3/CT2.Whereby, be conducive to eyeglass to make molding, and the lens error correction ability of the 3rd lens can be promoted.
The abbe number of the second lens is V2, and it meets following condition: V2 < 30.Whereby, contribute to revising the aberration of optical imaging lens group.
First lens thickness on optical axis is CT1, second lens thickness on optical axis is CT2,4th lens thickness on optical axis is CT4, and the 5th lens thickness on optical axis is CT5, and it meets following condition: 0.85 < CT1/ (CT2+CT4+CT5) < 1.25.Whereby, the thickness of each lens is comparatively suitable, contributes to the lens homogeneity when making and mouldability.
The f-number of optical imaging lens group is Fno, and it meets following condition: Fno < 1.75.Whereby, by the aperture size suitably adjusting optical imaging lens group, optical imaging lens group can be made to have the characteristic of large aperture, higher shutter speed still can be adopted when light is inadequate with shooting clear image.
5th surface, lens image side is BL to imaging surface distance on optical axis, and the first lens thing side surface is TL to imaging surface distance on optical axis, and it meets following condition: BL/TL < 0.18.Whereby, contribute to shortening the back focal length of optical imaging lens group, to maintain suitable optical imaging lens group total length.
The optical imaging lens group of the present invention can be used in wavelength 750 nanometers (nm) to the wave band of 1050 nanometers.Whereby, can effectively capture infrared wavelength range light, with suitable in various infrared photography application such as the detection of dynamic body-sensing, low light source shootings.
First lens thing side surface is TL to imaging surface distance on optical axis, and the entrance pupil aperture of optical imaging lens group is EPD, and it meets following condition: TL/EPD < 2.0.Whereby, the light-inletting quantity of optical imaging lens group can be increased, be conducive to the capture photoperceptivity promoting under low lighting environment.
In optical imaging lens group, the configuration of aperture can be preposition aperture or mid-aperture.Wherein preposition aperture implies that aperture is arranged between object and the first lens, and mid-aperture then represents that aperture is arranged between the first lens and imaging surface.If aperture is preposition aperture, the outgoing pupil (ExitPupil) that can make optical imaging lens group produces longer distance with imaging surface, make it have telecentricity (Telecentric) effect, and CCD or CMOS that can increase sense electronics optical element receives the efficiency of image；If mid-aperture, contribute to the angle of visual field of expansion system, make optical imaging lens group have the advantage of wide-angle lens.
In the optical imaging lens group that the present invention discloses, the material of lens can be plastics or glass.When the material of lens is glass, it is possible to increase the degree of freedom of refracting power configuration.Another lens material of working as is plastics, then can effectively reduce production cost.Additionally, aspheric surface (ASP) can be arranged on lens surface, aspheric surface can easily be fabricated to the shape beyond sphere, obtain more control variable, in order to cut down aberration, and then the required number using lens of reduction, therefore can effectively reduce optics total length.
In the optical imaging lens group that the present invention discloses, if lens surface is convex surface and when not defining this convex surface position, then it represents that this lens surface is convex surface in dipped beam axle place；If lens surface is concave surface and when not defining this concave surface position, then it represents that this lens surface is concave surface in dipped beam axle place.If the refracting power of lens or focal length do not define its regional location, then it represents that the refracting power of these lens or focal length are the lens refracting power in dipped beam axle place or focal length.
In the optical imaging lens group that the present invention discloses, the imaging surface (ImageSurface) of optical imaging lens group is according to the difference of the sense electronics optical element of its correspondence, can be a plane or the curved surface having arbitrary curvature, particularly relate to concave surface towards toward thing side to curved surface.
In the optical imaging lens group that the present invention discloses, at least one diaphragm can be provided with, before its position may be disposed at the first lens, between each lens or after last lens, the kind of this diaphragm such as credit light diaphragm (GlareStop) or field stop (FieldStop) etc., in order to reduce veiling glare, contribute to promoting the quality of image.
In the optical imaging lens group that the present invention discloses, light-transmitting plate may be disposed between the 5th lens and imaging surface.When light-transmitting plate is arranged between the 5th lens and imaging surface, 5th surface, lens image side comprises light-transmitting plate thickness on optical axis to imaging surface distance BL on optical axis, and the first lens thing side surface comprises light-transmitting plate thickness on optical axis to imaging surface distance TL on optical axis.
The present invention also provides for a kind of image-taking device, and it comprises aforementioned optical imaging lens group and sense electronics optical element, and wherein sense electronics optical element is arranged on the imaging surface of optical imaging lens group.It is preferred that this image-taking device can further include lens barrel (BarrelMember), supports device (HolderMember) or its combination.
Refer to Figure 19, Figure 20, Figure 21 and Figure 22, image-taking device 10 many-side can be applied to smart mobile phone (as shown in figure 19), tablet PC (as shown in figure 20), Wearable device (as shown in figure 21) and infrared photographic device (as shown in figure 22) etc..It is preferred that electronic installation can further include control unit (ControlUnits), display unit (DisplayUnits), storage element (StorageUnits), temporary storage element (RAM) or its combination.
The more visual demand of optical imaging lens group of the present invention is applied in the optical system of mobile focusing, and has the characteristic of excellent lens error correction and good image quality concurrently.The present invention also can many-side be applied in the electronic installations such as three-dimensional (3D) image capture, digital camera, mobile device, tablet PC, intelligent television, network monitoring device, drive recorder, reversing developing unit, somatic sensation television game machine and Wearable device.The optical imaging lens group of the present invention also apply be applicable to carry the electronic installation of infrared ray camera lens, as the detection of dynamic body-sensing, low light source shooting etc. need the electronic installation etc. of avoiding infrared ray to disturb.Furthermore, it is understood that the optical imaging lens group of the present invention can be used in wavelength 750 nanometers (nm) to the wave band of 1050 nanometers, but this wavelength band and be not used to restriction the present invention.Before to take off electronic installation be only the practice example that the present invention is exemplarily described, and the operation strategies of the image-taking device of the unrestricted present invention.
According to above-mentioned embodiment, specific embodiment set forth below also coordinates accompanying drawing to be described in detail.
<first embodiment>
Refer to Fig. 1 and Fig. 2, wherein Fig. 1 illustrates image-taking device schematic diagram according to a first embodiment of the present invention, and Fig. 2 is sequentially the spherical aberration of first embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 1, image-taking device comprises optical imaging lens group (not another label) and sense electronics optical element 180.Optical imaging lens group is sequentially comprised aperture the 100, first lens the 110, second lens the 120, the 3rd lens the 130, the 4th lens the 140, the 5th lens 150, filter element (Filter) 160 and imaging surface 170 by thing side to image side.Wherein, sense electronics optical element 180 is arranged on imaging surface 170.The single disengaged lens having refracting power in optical imaging lens group are five (110-150).First lens the 110, second lens the 120, the 3rd lens the 130, the 4th lens 140 and the 5th lens 150 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.
First lens 110 have positive refracting power, and are plastic material, and its thing side surface 111 is convex surface in dipped beam axle place, and its surface, image side 112 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
Second lens 120 have positive refracting power, and are plastic material, and its thing side surface 121 is convex surface in dipped beam axle place, and its surface, image side 122 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
3rd lens 130 have negative refracting power, and are plastic material, and its thing side surface 131 is concave surface in dipped beam axle place, and its surface, image side 132 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
4th lens 140 have positive refracting power, and are plastic material, and its thing side surface 141 is convex surface in dipped beam axle place, and its surface, image side 142 is convex surface in dipped beam axle place, and its two surface is all aspheric surface, and its thing side surface 141 has at least one point of inflexion in off-axis place.
5th lens 150 have negative refracting power, and are plastic material, and its thing side surface 151 is concave surface in dipped beam axle place, and its surface, image side 152 is concave surface in dipped beam axle place, and its two surface is all aspheric surface, and its surface, image side 152 has at least one convex surface in off-axis place.
The material of filter element 160 is glass, and it is arranged between the 5th lens 150 and imaging surface 170, has no effect on the focal length of optical imaging lens group.
The aspheric fitting equation of above-mentioned each lens is expressed as follows:
；Wherein:
X: in aspheric surface, distance optical axis is the point of Y, its be tangential on aspheric surface optical axis the relative distance of the tangent plane of intersection point；
Y: the vertical dimension of the point in aspheric curve and optical axis；
R: radius of curvature；
K: conical surface coefficient；And
Ai: the i-th rank asphericity coefficient.
In the optical imaging lens group of first embodiment, the focal length of optical imaging lens group is f, the f-number (F-number) of optical imaging lens group is Fno, in optical imaging lens group, the half at maximum visual angle is HFOV, its numerical value is as follows: f=5.98mm (millimeter), Fno=1.45, HFOV=27.4 degree (deg.).
The abbe number of the second lens 120 is V2, and it meets following condition: V2=23.5.
The radius of curvature of the second lens thing side surface 121 is R3, and the radius of curvature on the second surface, lens image side 122 is R4, and it meets following condition: | (R3+R4)/(R3-R4) |=10.00.
The focal length of optical imaging lens group is f, and the radius of curvature of the 4th lens thing side surface 141 is R7, and the radius of curvature on the 4th surface, lens image side 142 is R8, and it meets following condition: (f/R7)+(f/R8)=-0.55.
Second lens 120 thickness on optical axis is CT2, and the 3rd lens 130 thickness on optical axis is CT3, and it meets following condition: CT3/CT2=3.38.
First lens 110 thickness on optical axis is CT1, second lens 120 thickness on optical axis is CT2,4th lens 140 thickness on optical axis is CT4, and the 5th lens 150 thickness on optical axis is CT5, and it meets following condition: CT1/ (CT2+CT4+CT5)=0.88.
The light-transmitting plate between 5th surface, lens image side 152 and imaging surface 170 gross thickness on optical axis be FPCT (in the present embodiment, light-transmitting plate is filter element 160, and the thickness that filter element 160 is on optical axis is FPCT), it meets following condition: FPCT=0.260mm.
The entrance pupil aperture of optical imaging lens group is EPD, and second lens 120 thickness on optical axis is CT2, and it meets following condition: EPD/CT2=12.50.
The focal length of the first lens 110 is f1, and the focal length of the second lens 120 is f2, and it meets following condition: f1/f2=0.57.
The focal length of the first lens 110 is f1, and the focal length of the 4th lens 140 is f4, and the focal length of the 5th lens 150 is f5, and it meets following condition: (| f4 |+| f5 |)/| f1 |=0.69.
First lens thing side surface 111 to the imaging surface 170 distance on optical axis is TL, and the entrance pupil aperture of optical imaging lens group is EPD, and it meets following condition: TL/EPD=1.69.
5th surface, lens image side 152 to the imaging surface 170 distance on optical axis is BL, and first lens thing side surface 111 to the imaging surface 170 distance on optical axis is TL, and it meets following condition: BL/TL=0.15.
Coordinate with reference to lower list 1 and table 2.
Table 1 is the structured data that Fig. 1 first embodiment is detailed, and wherein the unit of radius of curvature, thickness and focal length is mm (millimeter), and surface 0 to 14 sequentially represents by the surface of thing side to image side.Table 2 is the aspherical surface data in first embodiment, and wherein, k is the conical surface coefficient in aspheric curve equation, and A4 to A16 then represents rank, each surface the 4 to 16th asphericity coefficient.Additionally, following embodiment form is schematic diagram and the aberration curve figure of corresponding each embodiment, in form, the definition of data is all identical with the definition of the table 1 of first embodiment and table 2, and not in this to go forth.
<the second embodiment>
Refer to Fig. 3 and Fig. 4, wherein Fig. 3 illustrates image-taking device schematic diagram according to a second embodiment of the present invention, and Fig. 4 is sequentially the spherical aberration of the second embodiment, astigmatism and distortion curve figure from left to right.From the figure 3, it may be seen that image-taking device comprises optical imaging lens group (not another label) and sense electronics optical element 280.Optical imaging lens group is sequentially comprised aperture the 200, first lens the 210, second lens the 220, the 3rd lens the 230, the 4th lens the 240, the 5th lens 250, filter element 260 and imaging surface 270 by thing side to image side.Wherein, sense electronics optical element 280 is arranged on imaging surface 270.The single disengaged lens having refracting power in optical imaging lens group are five (210-250).First lens the 210, second lens the 220, the 3rd lens the 230, the 4th lens 240 and the 5th lens 250 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.
First lens 210 have positive refracting power, and are plastic material, and its thing side surface 211 is convex surface in dipped beam axle place, and its surface, image side 212 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
Second lens 220 have positive refracting power, and are plastic material, and its thing side surface 221 is convex surface in dipped beam axle place, and its surface, image side 222 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
3rd lens 230 have negative refracting power, and are plastic material, and its thing side surface 231 is concave surface in dipped beam axle place, and its surface, image side 232 is convex surface in dipped beam axle place, and its two surface is all aspheric surface.
4th lens 240 have positive refracting power, and are plastic material, and its thing side surface 241 is convex surface in dipped beam axle place, and its surface, image side 242 is convex surface in dipped beam axle place, and its two surface is all aspheric surface, and its thing side surface 141 has at least one point of inflexion in off-axis place.
5th lens 250 have negative refracting power, and are plastic material, and its thing side surface 251 is concave surface in dipped beam axle place, and its surface, image side 252 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.Its surface, image side 252 has at least one convex surface in off-axis place.
The material of filter element 260 is glass, and it is arranged between the 5th lens 250 and imaging surface 270, has no effect on the focal length of optical imaging lens group.
Please coordinate with reference to lower list 3 and table 4.
In second embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, the definition described in following table is all identical with first embodiment, not in this to go forth.
<the 3rd embodiment>
Refer to Fig. 5 and Fig. 6, wherein Fig. 5 illustrates image-taking device schematic diagram according to a third embodiment of the present invention, and Fig. 6 is sequentially the spherical aberration of the 3rd embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 5, image-taking device comprises optical imaging lens group (not another label) and sense electronics optical element 380.Optical imaging lens group is sequentially comprised aperture the 300, first lens the 310, second lens the 320, the 3rd lens the 330, the 4th lens the 340, the 5th lens 350, filter element 360 and imaging surface 370 by thing side to image side.Wherein, sense electronics optical element 380 is arranged on imaging surface 370.The single disengaged lens having refracting power in optical imaging lens group are five (310-350).First lens the 310, second lens the 320, the 3rd lens the 330, the 4th lens 340 and the 5th lens 350 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.
First lens 310 have positive refracting power, and are plastic material, and its thing side surface 311 is convex surface in dipped beam axle place, and its surface, image side 312 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
Second lens 320 have positive refracting power, and are plastic material, and its thing side surface 321 is convex surface in dipped beam axle place, and its surface, image side 322 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
3rd lens 330 have negative refracting power, and are plastic material, and its thing side surface 331 is concave surface in dipped beam axle place, and its surface, image side 332 is convex surface in dipped beam axle place, and its two surface is all aspheric surface.
4th lens 340 have positive refracting power, and are plastic material, and its thing side surface 341 is convex surface in dipped beam axle place, and its surface, image side 342 is convex surface in dipped beam axle place, and its two surface is all aspheric surface, and its thing side surface 341 has at least one point of inflexion in off-axis place.
5th lens 350 have negative refracting power, and are plastic material, and its thing side surface 351 is concave surface in dipped beam axle place, and its surface, image side 352 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.Its surface, image side 352 has at least one convex surface in off-axis place.
The material of filter element 360 is glass, and it is arranged between the 5th lens 350 and imaging surface 370, has no effect on the focal length of optical imaging lens group.
Please coordinate with reference to lower list 5 and table 6.
In 3rd embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, the definition described in following table is all identical with first embodiment, not in this to go forth.
<the 4th embodiment>
Refer to Fig. 7 and Fig. 8, wherein Fig. 7 illustrates image-taking device schematic diagram according to a fourth embodiment of the present invention, and Fig. 8 is sequentially the spherical aberration of the 4th embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 7, image-taking device comprises optical imaging lens group (not another label) and sense electronics optical element 480.Optical imaging lens group is sequentially comprised aperture the 400, first lens the 410, second lens the 420, the 3rd lens the 430, the 4th lens the 440, the 5th lens 450, filter element 460 and imaging surface 470 by thing side to image side.Wherein, sense electronics optical element 480 is arranged on imaging surface 470.The single disengaged lens having refracting power in optical imaging lens group are five (410-450).First lens the 410, second lens the 420, the 3rd lens the 430, the 4th lens 440 and the 5th lens 450 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.
First lens 410 have positive refracting power, and are plastic material, and its thing side surface 411 is convex surface in dipped beam axle place, and its surface, image side 412 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
Second lens 420 have positive refracting power, and are plastic material, and its thing side surface 421 is convex surface in dipped beam axle place, and its surface, image side 422 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
3rd lens 430 have negative refracting power, and are plastic material, and its thing side surface 431 is concave surface in dipped beam axle place, and its surface, image side 432 is convex surface in dipped beam axle place, and its two surface is all aspheric surface.
4th lens 440 have positive refracting power, and are plastic material, and its thing side surface 441 is convex surface in dipped beam axle place, and its surface, image side 442 is convex surface in dipped beam axle place, and its two surface is all aspheric surface, and its thing side surface 441 has at least one point of inflexion in off-axis place.
5th lens 450 have negative refracting power, and are plastic material, and its thing side surface 451 is concave surface in dipped beam axle place, and its surface, image side 452 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.Its surface, image side 452 has at least one convex surface in off-axis place.
The material of filter element 460 is glass, and it is arranged between the 5th lens 450 and imaging surface 470, has no effect on the focal length of optical imaging lens group.
Please coordinate with reference to lower list 7 and table 8.
In 4th embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, the definition described in following table is all identical with first embodiment, not in this to go forth.
<the 5th embodiment>
Refer to Fig. 9 and Figure 10, wherein Fig. 9 illustrates image-taking device schematic diagram according to a fifth embodiment of the present invention, and Figure 10 is sequentially the spherical aberration of the 5th embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 9, image-taking device comprises optical imaging lens group (not another label) and sense electronics optical element 580.Optical imaging lens group is sequentially comprised aperture the 500, first lens the 510, second lens the 520, the 3rd lens the 530, the 4th lens the 540, the 5th lens 550, filter element 560 and imaging surface 570 by thing side to image side.Wherein, sense electronics optical element 580 is arranged on imaging surface 570.The single disengaged lens having refracting power in optical imaging lens group are five (510-550).First lens the 510, second lens the 520, the 3rd lens the 530, the 4th lens 540 and the 5th lens 550 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.
First lens 510 have positive refracting power, and are plastic material, and its thing side surface 511 is convex surface in dipped beam axle place, and its surface, image side 512 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
Second lens 520 have positive refracting power, and are plastic material, and its thing side surface 521 is convex surface in dipped beam axle place, and its surface, image side 522 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
3rd lens 530 have positive refracting power, and are plastic material, and its thing side surface 531 is concave surface in dipped beam axle place, and its surface, image side 532 is convex surface in dipped beam axle place, and its two surface is all aspheric surface.
4th lens 540 have positive refracting power, and are plastic material, and its thing side surface 541 is convex surface in dipped beam axle place, and its surface, image side 542 is convex surface in dipped beam axle place, and its two surface is all aspheric surface, and its thing side surface 541 has at least one point of inflexion in off-axis place.
5th lens 550 have negative refracting power, and are plastic material, and its thing side surface 551 is concave surface in dipped beam axle place, and its surface, image side 552 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.Its surface, image side 552 has at least one convex surface in off-axis place.
The material of filter element 560 is glass, and it is arranged between the 5th lens 550 and imaging surface 570, has no effect on the focal length of optical imaging lens group.
Please coordinate with reference to lower list 9 and table 10.
In 5th embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, the definition described in following table is all identical with first embodiment, not in this to go forth.
<sixth embodiment>
Refer to Figure 11 and Figure 12, wherein Figure 11 illustrates image-taking device schematic diagram according to a sixth embodiment of the present invention, and Figure 12 is sequentially the spherical aberration of sixth embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 11, image-taking device comprises optical imaging lens group (not another label) and sense electronics optical element 680.Optical imaging lens group is sequentially comprised aperture the 600, first lens the 610, second lens the 620, the 3rd lens the 630, the 4th lens the 640, the 5th lens 650, filter element 660 and imaging surface 670 by thing side to image side.Wherein, sense electronics optical element 680 is arranged on imaging surface 670.The single disengaged lens having refracting power in optical imaging lens group are five (610-650).First lens the 610, second lens the 620, the 3rd lens the 630, the 4th lens 640 and the 5th lens 650 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.
First lens 610 have positive refracting power, and are plastic material, and its thing side surface 611 is convex surface in dipped beam axle place, and its surface, image side 612 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
Second lens 620 have positive refracting power, and are plastic material, and its thing side surface 621 is convex surface in dipped beam axle place, and its surface, image side 622 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
3rd lens 630 have negative refracting power, and are plastic material, and its thing side surface 631 is convex surface in dipped beam axle place, and its surface, image side 632 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
4th lens 640 have positive refracting power, and are plastic material, and its thing side surface 641 is convex surface in dipped beam axle place, and its surface, image side 642 is convex surface in dipped beam axle place, and its two surface is all aspheric surface, and its thing side surface 641 has at least one point of inflexion in off-axis place.
5th lens 650 have negative refracting power, and are plastic material, and its thing side surface 651 is concave surface in dipped beam axle place, and its surface, image side 652 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.Its surface, image side 652 has at least one convex surface in off-axis place.
The material of filter element 660 is glass, and it is arranged between the 5th lens 650 and imaging surface 670, has no effect on the focal length of optical imaging lens group.
Please coordinate with reference to lower list 11 and table 12.
In sixth embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, the definition described in following table is all identical with first embodiment, not in this to go forth.
<the 7th embodiment>
Refer to Figure 13 and Figure 14, wherein Figure 13 illustrates image-taking device schematic diagram according to a seventh embodiment of the present invention, and Figure 14 is sequentially the spherical aberration of the 7th embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 13, image-taking device comprises optical imaging lens group (not another label) and sense electronics optical element 780.Optical imaging lens group is sequentially comprised the first lens 710, aperture the 700, second lens the 720, the 3rd lens the 730, the 4th lens the 740, the 5th lens 750, filter element 760 and imaging surface 770 by thing side to image side.Wherein, sense electronics optical element 780 is arranged on imaging surface 770.The single disengaged lens having refracting power in optical imaging lens group are five (710-750).First lens the 710, second lens the 720, the 3rd lens the 730, the 4th lens 740 and the 5th lens 750 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.
First lens 710 have positive refracting power, and are plastic material, and its thing side surface 711 is convex surface in dipped beam axle place, and its surface, image side 712 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
Second lens 720 have positive refracting power, and are plastic material, and its thing side surface 721 is convex surface in dipped beam axle place, and its surface, image side 722 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
3rd lens 730 have negative refracting power, and are plastic material, and its thing side surface 731 is convex surface in dipped beam axle place, and its surface, image side 732 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
4th lens 740 have positive refracting power, and are plastic material, and its thing side surface 741 is convex surface in dipped beam axle place, and its surface, image side 742 is convex surface in dipped beam axle place, and its two surface is all aspheric surface, and its thing side surface 741 has at least one point of inflexion in off-axis place.
5th lens 750 have negative refracting power, and are plastic material, and its thing side surface 751 is concave surface in dipped beam axle place, and its surface, image side 752 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.Its surface, image side 752 has at least one convex surface in off-axis place.
The material of filter element 760 is glass, and it is arranged between the 5th lens 750 and imaging surface 770, has no effect on the focal length of optical imaging lens group.
Please coordinate with reference to lower list 13 and table 14.
In 7th embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, the definition described in following table is all identical with first embodiment, not in this to go forth.
<the 8th embodiment>
Refer to Figure 15 and Figure 16, wherein Figure 15 illustrates image-taking device schematic diagram according to a eighth embodiment of the present invention, and Figure 16 is sequentially the spherical aberration of the 8th embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 15, image-taking device comprises optical imaging lens group (not another label) and sense electronics optical element 880.Optical imaging lens group is sequentially comprised aperture the 800, first lens the 810, second lens the 820, the 3rd lens the 830, the 4th lens the 840, the 5th lens 850, filter element 860 and imaging surface 870 by thing side to image side.Wherein, sense electronics optical element 880 is arranged on imaging surface 870.The single disengaged lens having refracting power in optical imaging lens group are five (810-850).First lens the 810, second lens the 820, the 3rd lens the 830, the 4th lens 840 and the 5th lens 850 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.
First lens 810 have positive refracting power, and are plastic material, and its thing side surface 811 is convex surface in dipped beam axle place, and its surface, image side 812 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
Second lens 820 have positive refracting power, and are plastic material, and its thing side surface 821 is convex surface in dipped beam axle place, and its surface, image side 822 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
3rd lens 830 have positive refracting power, and are plastic material, and its thing side surface 831 is convex surface in dipped beam axle place, and its surface, image side 832 is convex surface in dipped beam axle place, and its two surface is all aspheric surface.
4th lens 840 have positive refracting power, and are plastic material, and its thing side surface 841 is convex surface in dipped beam axle place, and its surface, image side 842 is convex surface in dipped beam axle place, and its two surface is all aspheric surface, and its thing side surface 841 has at least one point of inflexion in off-axis place.
5th lens 850 have negative refracting power, and are plastic material, and its thing side surface 851 is concave surface in dipped beam axle place, and its surface, image side 852 is concave surface in dipped beam axle place, and its two surface is all aspheric surface, and its surface, image side 852 has at least one convex surface in off-axis place.
The material of filter element 860 is glass, and it is arranged between the 5th lens 850 and imaging surface 870, has no effect on the focal length of optical imaging lens group.
Please coordinate with reference to lower list 15 and table 16.
In 8th embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, the definition described in following table is all identical with first embodiment, not in this to go forth.
<the 9th embodiment>
Refer to Figure 17 and Figure 18, wherein Figure 17 illustrates image-taking device schematic diagram according to a ninth embodiment of the present invention, and Figure 18 is sequentially the spherical aberration of the 9th embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 17, image-taking device comprises optical imaging lens group (not another label) and sense electronics optical element 980.Optical imaging lens group is sequentially comprised aperture the 900, first lens the 910, second lens the 920, the 3rd lens the 930, the 4th lens the 940, the 5th lens 950, filter element 960 and imaging surface 970 by thing side to image side.Wherein, sense electronics optical element 980 is arranged on imaging surface 970.The single disengaged lens having refracting power in optical imaging lens group are five (910-950).First lens the 910, second lens the 920, the 3rd lens the 930, the 4th lens 940 and the 5th lens 950 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.
First lens 910 have positive refracting power, and are plastic material, and its thing side surface 911 is convex surface in dipped beam axle place, and its surface, image side 912 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
Second lens 920 have positive refracting power, and are plastic material, and its thing side surface 921 is convex surface in dipped beam axle place, and its surface, image side 922 is concave surface in dipped beam axle place, and its two surface is all aspheric surface.
3rd lens 930 have negative refracting power, and are plastic material, and its thing side surface 931 is concave surface in dipped beam axle place, and its surface, image side 932 is convex surface in dipped beam axle place, and its two surface is all aspheric surface.
4th lens 940 have positive refracting power, and are plastic material, and its thing side surface 941 is convex surface in dipped beam axle place, and its surface, image side 942 is convex surface in dipped beam axle place, and its two surface is all aspheric surface, and its thing side surface 941 has at least one point of inflexion in off-axis place.
5th lens 950 have negative refracting power, and are plastic material, and its thing side surface 951 is concave surface in dipped beam axle place, and its surface, image side 952 is concave surface in dipped beam axle place, and its two surface is all aspheric surface, and its surface, image side 952 has at least one convex surface in off-axis place.
The material of filter element 960 is glass, and it is arranged between the 5th lens 950 and imaging surface 970, has no effect on the focal length of optical imaging lens group.
Please coordinate with reference to lower list 17 and table 18.
In 9th embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, the definition described in following table is all identical with first embodiment, not in this to go forth.
Above-mentioned image-taking device can be equipped in electronic installation.The present invention uses the optical imaging lens group of five tool refracting power lens, wherein the first lens and the second lens all have positive refracting power, contribute to being uniformly distributed the receipts light ability of imaging lens group, effectively to slow down the change in refraction of incident ray, and then avoid image periphery to produce veiling glare.Additionally, the first lens and the second lens all have positive refracting power can effectively reduce the back focal length of imaging lens group, optical imaging lens group is made to maintain miniaturization.Additionally, when meeting specified conditions, the second lens have better suited positive refracting power, contribute to the positive refracting power of balance the first lens, and avoid the positive refracting power of single lens excessively strong, effectively to reduce the sensitivity of optical imaging lens group.It addition, the change of shape of the 4th lens can effectively be slowed down, to avoid the face reflection problems caused because change of shape is excessive, and reduce difficult forming degree.
Although the present invention is disclosed above with embodiment; so it is not limited to the present invention, any is familiar with this those skilled in the art, without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations, therefore protection scope of the present invention ought be as the criterion depending on the scope that appending claims defines.
Claims (28)
1. an optical imaging lens group, it is characterised in that sequentially comprised to image side by thing side:
One first lens, have positive refracting power, and its thing side surface is convex surface in dipped beam axle place；
One second lens, have positive refracting power, and its thing side surface is convex surface in dipped beam axle place；
One the 3rd lens, have refracting power；
One the 4th lens, have positive refracting power, and its thing side surface is convex surface in dipped beam axle place, and its surface, image side is convex surface in dipped beam axle place, and its thing side surface and surface, image side are all aspheric surface；And
One the 5th lens, have negative refracting power, and its thing side surface is concave surface in dipped beam axle place, and its surface, image side is concave surface in dipped beam axle place, and its surface, image side has at least one convex surface in off-axis place, and its thing side surface and surface, image side are all aspheric surface；
Wherein, the lens having refracting power in described optical imaging lens group are five, are respectively provided with an airspace in described first lens, described second lens, described 3rd lens, described 4th lens and described 5th lens between wantonly two adjacent lens on optical axis；
Wherein, the focal length of described optical imaging lens group is f, and the focal length of described first lens is f1, the focal length of described second lens is f2, the radius of curvature of described 4th lens thing side surface is R7, and the radius of curvature on described 4th surface, lens image side is R8, and it meets following condition:
0<f1/f2<2.0；And
-3.0<(f/R7)+(f/R8)。
2. optical imaging lens group according to claim 1, it is characterised in that the focal length of described first lens is f1, the focal length of described second lens is f2, and it meets following condition:
0<f1/f2<1.5。
3. optical imaging lens group according to claim 2, it is characterised in that the radius of curvature of described second lens thing side surface is R3, the radius of curvature on described second surface, lens image side is R4, and it meets following condition:
8.0<|(R3+R4)/(R3-R4)|。
4. optical imaging lens group according to claim 2, it is characterised in that the entrance pupil aperture of described optical imaging lens group is EPD, described second lens thickness on optical axis is CT2, and it meets following condition:
8.0<EPD/CT2。
5. optical imaging lens group according to claim 2, it is characterized in that, the focal length of described optical imaging lens group is f, and the radius of curvature of described 4th lens thing side surface is R7, the radius of curvature on described 4th surface, lens image side is R8, and it meets following condition:
-2.0<(f/R7)+(f/R8)。
6. optical imaging lens group according to claim 5, it is characterised in that the focal length of described first lens is f1, the focal length of described 4th lens is f4, and the focal length of described 5th lens is f5, and it meets following condition:
(|f4|+|f5|)/|f1|<1.25。
7. optical imaging lens group according to claim 5, it is characterised in that described second lens thickness on optical axis is CT2, described 3rd lens thickness on optical axis is CT3, and it meets following condition:
2.0<CT3/CT2。
8. optical imaging lens group according to claim 1, it is characterised in that the abbe number of described second lens is V2, and it meets following condition:
V2<30。
9. optical imaging lens group according to claim 8, it is characterized in that, at least one light-transmitting plate is also comprised between described 5th lens and an imaging surface, the described at least one light-transmitting plate between described 5th surface, lens image side and described imaging surface gross thickness on optical axis is FPCT, and it meets following condition:
FPCT≤0.275 millimeter.
10. optical imaging lens group according to claim 8, it is characterized in that, described first lens thickness on optical axis is CT1, described second lens thickness on optical axis is CT2, described 4th lens thickness on optical axis is CT4, described 5th lens thickness on optical axis is CT5, and it meets following condition:
0.85<CT1/(CT2+CT4+CT5)<1.25。
11. optical imaging lens group according to claim 8, it is characterised in that described 4th lens thing side surface has at least one point of inflexion in off-axis place.
12. optical imaging lens group according to claim 1, it is characterized in that, the focal length of described optical imaging lens group is f, and the radius of curvature of described 4th lens thing side surface is R7, the radius of curvature on described 4th surface, lens image side is R8, and it meets following condition:
-1.5<(f/R7)+(f/R8)<-0.25。
13. optical imaging lens group according to claim 1, it is characterised in that the f-number of described optical imaging lens group is Fno, and it meets following condition:
Fno<1.75。
14. optical imaging lens group according to claim 1, it is characterized in that, described 5th surface, lens image side is BL to imaging surface distance on optical axis, and described first lens thing side surface to described imaging surface distance on optical axis is TL, and it meets following condition:
BL/TL<0.18。
15. optical imaging lens group according to claim 1, it is characterised in that described optical imaging lens is used in the wave band of wavelength 750 nanometers to 1050 nanometers.
16. an image-taking device, it is characterised in that comprise:
Optical imaging lens group according to claim 1；And
One sense electronics optical element, wherein said sense electronics optical element is arranged on an imaging surface of described optical imaging lens group.
17. an electronic installation, it is characterised in that comprise:
Image-taking device according to claim 16.
18. an optical imaging lens group, it is characterised in that sequentially comprised to image side by thing side:
One first lens, have positive refracting power, and its thing side surface is convex surface in dipped beam axle place；
One second lens, have positive refracting power, and its thing side surface is convex surface in dipped beam axle place；
One the 3rd lens, have refracting power；
One the 4th lens, have positive refracting power, and its thing side surface is convex surface in dipped beam axle place, and its surface, image side is convex surface in dipped beam axle place, and its thing side surface and surface, image side are all aspheric surface；And
One the 5th lens, have negative refracting power, and its thing side surface is concave surface in dipped beam axle place, and its surface, image side is concave surface in dipped beam axle place, and its surface, image side has at least one convex surface in off-axis place, and its thing side surface and surface, image side are all aspheric surface；
Wherein, the lens having refracting power in described optical imaging lens group are five, are respectively provided with an airspace in described first lens, described second lens, described 3rd lens, described 4th lens and described 5th lens between wantonly two adjacent lens on optical axis；
Wherein, the focal length of described first lens is f1, and the focal length of described second lens is f2, and it meets following condition:
0<f1/f2<1.5。
19. optical imaging lens group according to claim 18, it is characterised in that the focal length of described first lens is f1, the focal length of described 4th lens is f4, and the focal length of described 5th lens is f5, and it meets following condition:
(|f4|+|f5|)/|f1|<1.0。
20. optical imaging lens group according to claim 18, it is characterised in that the f-number of described optical imaging lens group is Fno, and it meets following condition:
Fno<1.75。
21. optical imaging lens group according to claim 18, it is characterized in that, the focal length of described optical imaging lens group is f, and the radius of curvature of described 4th lens thing side surface is R7, the radius of curvature on described 4th surface, lens image side is R8, and it meets following condition:
-1.65<(f/R7)+(f/R8)。
22. optical imaging lens group according to claim 18, it is characterised in that described first lens thing side surface is TL to imaging surface distance on optical axis, and the entrance pupil aperture of described optical imaging lens group is EPD, and it meets following condition:
TL/EPD<2.0。
23. optical imaging lens group according to claim 18, it is characterised in that the abbe number of described second lens is V2, and it meets following condition:
V2<30。
24. optical imaging lens group according to claim 18, it is characterised in that the radius of curvature of described second lens thing side surface is R3, the radius of curvature on described second surface, lens image side is R4, and it meets following condition:
8.0<|(R3+R4)/(R3-R4)|。
25. optical imaging lens group according to claim 18, it is characterised in that described optical imaging lens is used in the wave band of wavelength 750 nanometers to 1050 nanometers.
26. an image-taking device, it is characterised in that comprise:
Optical imaging lens group according to claim 18；And
One sense electronics optical element, wherein said sense electronics optical element is arranged on an imaging surface of described optical imaging lens group.
27. an electronic installation, it is characterised in that comprise:
Image-taking device according to claim 26.
28. an optical imaging lens group, it is characterised in that sequentially comprised to image side by thing side:
One first lens, have positive refracting power, and its thing side surface is convex surface in dipped beam axle place；
One second lens, have positive refracting power, and its thing side surface is convex surface in dipped beam axle place；
One the 3rd lens, have refracting power；
One the 4th lens, have positive refracting power, and its thing side surface is convex surface in dipped beam axle place, and its surface, image side is convex surface in dipped beam axle place, and its thing side surface and surface, image side are all aspheric surface；And
One the 5th lens, have negative refracting power, and its thing side surface is concave surface in dipped beam axle place, and its surface, image side is concave surface in dipped beam axle place, and its surface, image side has at least one convex surface in off-axis place, and its thing side surface and surface, image side are all aspheric surface；
Wherein, the lens having refracting power in described optical imaging lens group are five, are respectively provided with an airspace in described first lens, described second lens, described 3rd lens, described 4th lens and described 5th lens between wantonly two adjacent lens on optical axis；
Wherein, the focal length of described first lens is f1, the focal length of described second lens is f2, at least one light-transmitting plate is also comprised between described 5th lens and an imaging surface, the described at least one light-transmitting plate between described 5th surface, lens image side and described imaging surface gross thickness on optical axis is FPCT, and it meets following condition:
0<f1/f2<1.5；And
FPCT≤0.275 millimeter.
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| CN201410756349.8A CN105739060B (en) | 2014-12-10 | 2014-12-10 | Optical imaging lens group, image-taking device and electronic installation |
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| CN201410756349.8A CN105739060B (en) | 2014-12-10 | 2014-12-10 | Optical imaging lens group, image-taking device and electronic installation |
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| CN105739060B CN105739060B (en) | 2018-01-02 |
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