CN105807406A - Optical imaging system, image-taking device, and electronic device - Google Patents
Optical imaging system, image-taking device, and electronic device Download PDFInfo
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- CN105807406A CN105807406A CN201410834916.7A CN201410834916A CN105807406A CN 105807406 A CN105807406 A CN 105807406A CN 201410834916 A CN201410834916 A CN 201410834916A CN 105807406 A CN105807406 A CN 105807406A
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Abstract
The present invention discloses an optical imaging system, an image-taking device, and an electronic device. The optical imaging system orderly comprises a first lens having refractive power, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side. The first lens has positive refractive power, and the object side surface of the first lens is a convex surface near an optical axis. The second lens has refractive power. The third lens has positive refractive power. The fourth lens has refractive power. The fifth lens has refractive power, the image side surface is a concave surface near the optical axis, and the object side surface and image side surface are aspheric surfaces. The sixth lens has refractive power, the image side surface is a concave surface near the optical axis, and the object side surface and the image side surface are aspheric surfaces. The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens have no relative movement in the optical axis. The optical imaging system also comprises an aperture arranged between an imaged object and the third lens.
Description
Technical field
The present invention relates to a kind of photo-optic system, image-taking device and electronic installation, particularly to a kind of photo-optic system 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 employings five chip lens arrangements are main, but owing to the high standards such as high-order intelligent mobile phone (SmartPhone), Wearable device (WearableDevice) and panel computer (TabletPersonalComputer) move the prevailing of device, driving the requirement in pixel with image quality of the miniaturization photographic lens to promote, existing five chip lens group will be unable to meet the demand of higher order.
Although there being development generally traditional six chip optical systems at present, to provide the photographic lens with large aperture.But, the optics total length of the optical system with large aperture is easily long, and makes optical system be difficult to have concurrently the characteristic of large aperture and miniaturization simultaneously.
Summary of the invention
It is an object of the invention to provide a kind of photo-optic system, image-taking device and electronic installation, wherein, photo-optic system has the characteristic of large aperture, good optical aberration correcting and miniaturization concurrently simultaneously.In photo-optic system provided by the invention, the first lens and the 3rd lens all have positive refracting power, the 3rd lens arrange in pairs or groups the first lens can the refracting power distribution of balance optical camera chain, and advantageously reduce the sensitivity of photo-optic system.Additionally, the 5th surface, lens image side is concave surface in dipped beam axle place, help avoid refracting power concentrations in the 5th lens, and reduce lens perimeter and make because curvature is excessive lens excessively bend, and then reduce the problem that molding is bad.Furthermore, 6th lens image side surface is concave surface in dipped beam axle place, and the 6th lens image side surface be convex surface in off-axis place, contribute to the principal point making photo-optic system away from image side end, and then effectively shorten the total length of photo-optic system, be beneficial to the miniaturization of photo-optic system, further can modified off-axis aberration to promote periphery image quality.When a specific condition is satisfied, contribute to the refracting power balanced arrangement making the first lens and the 3rd lens, be effectively reduced the generation of aberration.
The present invention provides a kind of photo-optic system, thing side to image side sequentially comprise the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens.First lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place.Second lens have refracting power.3rd lens have positive refracting power.4th lens have refracting power.5th lens have refracting power, and its surface, image side is concave surface in dipped beam axle place, and its thing side surface and surface, image side are all aspheric surface.6th lens have refracting power, 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 photo-optic system are six.First lens, the second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens are respectively provided with an airspace between wantonly two adjacent lens on optical axis.First lens, the second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens each other on optical axis without relative movement.Photo-optic system more comprises an aperture, is arranged between an object and the 3rd lens.When the maximum effective radius on the 6th surface, lens image side is SD62, the entrance pupil aperture of photo-optic system is EPD, and the focal length of the first lens is f1, and the focal length of the 3rd lens is f3, to the 6th surface, lens image side, the distance on optical axis is Td to first lens thing side surface, and it meets following condition:
0.6<SD62/EPD<1.1；
0.80<f1/f3；And
Td/EPD<1.95。
The present invention separately provides a kind of photo-optic system, thing side to image side sequentially comprise the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens.First lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place, and the first lens are plastic cement material.Second lens have refracting power.3rd lens have positive refracting power.4th lens have refracting power.5th lens have refracting power, and its surface, image side is concave surface in dipped beam axle place, and its thing side surface and surface, image side are all aspheric surface.6th lens have refracting power, 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 photo-optic system are six.First lens, the second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens are respectively provided with an airspace between wantonly two adjacent lens on optical axis.First lens, the second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens each other on optical axis without relative movement.Photo-optic system more comprises an aperture, and aperture is arranged between an object and the 3rd lens.When the maximum effective radius on the 6th surface, lens image side is SD62, the entrance pupil aperture of photo-optic system is EPD, the focal length of photo-optic system is f, the focal length of the first lens is f1, the focal length of the 3rd lens is f3, to the 6th surface, lens image side, the distance on optical axis is Td to first lens thing side surface, the radius of curvature of the 3rd lens thing side surface is R5, the radius of curvature of the 3rd surface, lens image side is R6, first lens thickness on optical axis is CT1, second lens thickness on optical axis is CT2, and it meets following condition:
0.6<SD62/EPD<1.33；
0.80<f1/f3；
Td/EPD<2.15；
-1.125<(f/R5)+(f/R6)；
1.45<CT1/CT2；And
8.25<EPD/CT2。
The present invention separately provides a kind of image-taking device, and it comprises aforesaid photo-optic system and sense electronics optical element, and wherein sense electronics optical element is arranged on the imaging surface of photo-optic system.
The present invention separately provides a kind of electronic installation, and it comprises aforesaid image-taking device.
When SD62/EPD meets above-mentioned condition, can suitably maintain the light-inletting quantity of external diameter size and improving optical camera chain, contribute to the miniaturization maintaining photo-optic system and meet large aperture demand.
When f1/f3 meets above-mentioned condition, contribute to the refracting power balanced arrangement making the first lens and the 3rd lens, be effectively reduced the generation of aberration.
When Td/EPD meets above-mentioned condition, the light-inletting quantity of photo-optic system can be increased, and maintain its miniaturization simultaneously.
When (f/R5)+(f/R6) meets above-mentioned condition, contribute to the spherical aberration revising photo-optic system to promote image quality.
When CT1/CT2 meets above-mentioned condition, the thickness of the first lens and the second lens is comparatively suitable, contributes to the eyeglass homogeneity when making with mouldability to promote fine ratio of product.
When EPD/CT2 meets above-mentioned condition, the lens design of slimming contributes to effectively reducing the overall length of photo-optic system, and has simultaneously and maintain effect of light-inletting quantity needed for photo-optic system.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Accompanying drawing explanation
Fig. 1 is shown according to the image-taking device schematic diagram of first embodiment of the invention；
Fig. 2 is sequentially the spherical aberration of first embodiment, astigmatism and distortion curve figure from left to right；
Fig. 3 is shown according to the image-taking device schematic diagram of second embodiment of the invention；
Fig. 4 is sequentially the spherical aberration of the second embodiment, astigmatism and distortion curve figure from left to right；
Fig. 5 is shown according to the image-taking device schematic diagram of third embodiment of the invention；
Fig. 6 is sequentially the spherical aberration of the 3rd embodiment, astigmatism and distortion curve figure from left to right；
Fig. 7 is shown according to the image-taking device schematic diagram of fourth embodiment of the invention；
Fig. 8 is sequentially the spherical aberration of the 4th embodiment, astigmatism and distortion curve figure from left to right；
Fig. 9 is shown according to the image-taking device schematic diagram of fifth embodiment of the invention；
Figure 10 is sequentially the spherical aberration of the 5th embodiment, astigmatism and distortion curve figure from left to right；
Figure 11 is shown according to the image-taking device schematic diagram of sixth embodiment of the invention；
Figure 12 is sequentially the spherical aberration of sixth embodiment, astigmatism and distortion curve figure from left to right；
Figure 13 is shown according to the image-taking device schematic diagram of seventh embodiment of the invention；
Figure 14 is sequentially the spherical aberration of the 7th embodiment, astigmatism and distortion curve figure from left to right；
Figure 15 is shown according to the image-taking device schematic diagram of eighth embodiment of the invention；
Figure 16 is sequentially the spherical aberration of the 8th embodiment, astigmatism and distortion curve figure from left to right；
Figure 17 is shown according in the 1st figure photo-optic system the 4th surface, lens image side intersection point on optical axis to the maximum effective radius position on the 4th surface, lens image side in the horizontal displacement of optical axis, and the schematic diagram of the maximum effective radius on the 6th surface, lens image side；
Figure 18 is shown according to the schematic diagram of a kind of electronic installation of the present invention；
Figure 19 is shown according to the schematic diagram of the another kind of electronic installation of the present invention；
Figure 20 is shown according to the schematic diagram of still another electronic installation of the present invention.
Wherein, accompanying drawing labelling
Image-taking device 10
Aperture 100,200,300,400,500,600,700,800
First lens 110,210,310,410,510,610,710,810
Thing side surface 111,211,311,411,511,611,711,811
Surface, image side 112,212,312,412,512,612,712,812
Second lens 120,220,320,420,520,620,720,820
Thing side surface 121,221,321,421,521,621,721,821
Surface, image side 122,222,322,422,522,622,722,822
3rd lens 130,230,330,430,530,630,730,830
Thing side surface 131,231,331,431,531,631,731,831
Surface, image side 132,232,332,432,532,632,732,832
4th lens 140,240,340,440,540,640,740,840
Thing side surface 141,241,341,441,541,641,741,841
Surface, image side 142,242,342,442,542,642,742,842
5th lens 150,250,350,450,550,650,750,850
Thing side surface 151,251,351,451,551,651,751,851
Surface, image side 152,252,352,452,552,652,752,852
6th lens 160,260,360,460,560,660,760,860
Thing side surface 161,261,361,461,561,661,761,861
Surface, image side 162,262,362,462,562,662,762,862
Infrared ray filters filter element 170,270,370,470,570,670,770,870 imaging surface 180,280,380,480,580,680,780,880
Sense electronics optical element 190,290,390,490,590,690,790,890
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
EPD: the entrance pupil aperture of photo-optic system
The focal length of f photo-optic system
The focal length of the f1: the first lens
The focal length of the f2: the second lens
The focal length of the f3: the three lens
The f-number of Fno photo-optic system
The half at maximum visual angle in HFOV photo-optic system
The refractive index of the N1: the first lens
The radius of curvature of the R5: the three lens thing side surface
The radius of curvature of the R6: the three surface, lens image side
The radius of curvature of the R10: the five surface, lens image side
The maximum effective radius of the SD62: the six surface, lens image side
Sag42: the four surface, lens image side intersection point on optical axis to the maximum effective radius position on the 4th surface, lens image side in the horizontal displacement of optical axis
T12: the first lens and second lens spacing distance on optical axis
T23: the second lens and the 3rd lens spacing distance on optical axis
Td: the first lens thing side surface is the distance on optical axis to the 6th surface, lens image side
The abbe number of the V4: the four lens
Detailed description of the invention
It is described in detail below in conjunction with the accompanying drawing structural principle to the present invention and operation principle:
Photo-optic system is sequentially comprised the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens by thing side to image side.Wherein, the lens having refracting power in photo-optic system are six.
First lens, the second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th 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, the 5th lens and the 6th lens can be six single disengaged (non-bondings) 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 optical imagery quality of impact.Therefore, the first lens in photo-optic system to the 6th lens can be the lens of six single disengaged tool refracting powers, and then is effectively improved problem produced by cemented lens.First lens, the second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens each other on optical axis without relative movement.In other words, the first lens are all fixed value to those airspaces between wantonly two adjacent lens in the 6th lens.
First lens have positive refracting power, and its thing side surface is convex surface in dipped beam axle place, and its surface, image side can be concave surface in dipped beam axle place.Whereby, it is possible to provide the positive refracting power needed for photo-optic system and the total length suitably adjusting photo-optic system, and have and reduce the effect that astigmatism produces.
Second lens can have negative refracting power.Whereby, the aberration of the first lens generation can be revised to promote image quality.
3rd lens have positive refracting power.Whereby, the 3rd lens arrange in pairs or groups the first lens can the refracting power distribution of balance optical camera chain, and advantageously reduce the sensitivity of photo-optic system.
4th lens can have negative refracting power, and its surface, image side can be convex surface in dipped beam axle place.Whereby, can effectively revise the Petzval sum (Petzval'ssum) of photo-optic system, so that imaging surface is more smooth, and contribute to strengthening the correction of astigmatism.
5th lens can have positive refracting power, and its surface, image side is concave surface in dipped beam axle place.Whereby, help avoid refracting power concentrations in the 5th lens, and reduce lens perimeter and make because curvature is excessive lens excessively bend, and then reduce the problem that molding is bad.
6th lens have refracting power, 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, contribute to the principal point making photo-optic system away from image side end, and then effectively shorten the total length of photo-optic system, be beneficial to the miniaturization of photo-optic system, further can modified off-axis aberration to promote periphery image quality.
The maximum effective radius of the 6th surface, lens image side is SD62 (i.e. the vertical dimension of the maximum effective radius position on the 6th surface, lens image side and optical axis), the entrance pupil aperture of photo-optic system is EPD, and it meets following condition: 0.6 < SD62/EPD < 1.33.Whereby, can suitably maintain the light-inletting quantity of external diameter size and improving optical camera chain, contribute to the miniaturization maintaining photo-optic system and meet large aperture demand.It is preferred that it meets following condition: 0.6 < SD62/EPD < 1.1.Refer to Figure 17, the schematic diagram of the maximum effective radius being shown according in Fig. 1 photo-optic system the 6th surface, lens image side.
The focal length of the first lens is f1, and the focal length of the 3rd lens is f3, and it meets following condition: 0.80 < f1/f3.Whereby, contribute to the refracting power balanced arrangement making the first lens and the 3rd lens, be effectively reduced the generation of aberration.It is preferred that it meets following condition: 0.95 < f1/f3.
To the 6th surface, lens image side, the distance on optical axis is Td to first lens thing side surface, and the entrance pupil aperture of photo-optic system is EPD, and it meets following condition: Td/EPD < 2.15.Whereby, the light-inletting quantity of photo-optic system can be increased, and maintain its miniaturization simultaneously.It is preferred that it meets following condition: Td/EPD < 1.95.
The focal length of photo-optic system is f, and the radius of curvature of the 3rd lens thing side surface is R5, and the radius of curvature on the 3rd surface, lens image side is R6, and it meets following condition :-1.125 < (f/R5)+(f/R6).Whereby, the spherical aberration revising photo-optic system is contributed to promote image quality.It is preferred that it meets following condition :-1.0 < (f/R5)+(f/R6) < 1.0.
First lens thickness on optical axis is CT1, and second lens thickness on optical axis is CT2, and it meets following condition: 1.45 < CT1/CT2.Whereby, the thickness of the first lens and the second lens is comparatively suitable, contributes to the eyeglass homogeneity when making with mouldability to promote fine ratio of product.
The entrance pupil aperture of photo-optic system is EPD, and second lens thickness on optical axis is CT2, and it meets following condition: 8.25 < EPD/CT2.Whereby, the lens design of slimming contributes to effectively reducing the overall length of photo-optic system, and has simultaneously and maintain effect of light-inletting quantity needed for photo-optic system.It is preferred that it meets following condition: 9.5 < EPD/CT2.
The refractive index of the first lens is N1, and it meets following condition: 1.40 < N1 < 1.65.Whereby, the configuration that the first lens select upper acquisition appropriate in material is conducive to.
The f-number of photo-optic system is Fno, and it meets following condition: Fno < 1.75.Whereby, can the aperture size of appropriately configured photo-optic system, make the photo-optic system with large aperture that higher shutter speed still can be adopted when light is inadequate with shooting clear image.It is preferred that it meets following condition: Fno < 1.55.
Second lens thickness on optical axis is CT2, and the 3rd lens thickness on optical axis is CT3, and the 4th lens thickness on optical axis is CT4, and it meets following condition: 1.0 < CT3/ (CT2+CT4).Whereby, contribute to the eyeglass homogeneity when making with mouldability to promote fine ratio of product, and design effectively to maintain miniaturization by corrected lens thickness.
The focal length of the first lens is f1, and the focal length of the second lens is f2, and it meets following condition :-1.0 < f1/f2.Whereby, the configuration of lens refracting power can be balanced, contribute to promoting lens error correction effect.It is preferred that it meets following condition :-1.0 < f1/f2 < 0.
The radius of curvature of the 3rd lens thing side surface is R5, and the radius of curvature on the 3rd surface, lens image side is R6, and it meets following condition: (R5+R6)/(R5-R6) < 0.50.Whereby, the spherical aberration correction effect of improving optical camera chain is contributed to.
The focal length of photo-optic system is f, and the radius of curvature on the 5th surface, lens image side is R10, and it meets following condition: 0.55 < f/R10 < 3.0.Whereby, help avoid refracting power concentrations in the 5th lens, and reduce lens perimeter and make because curvature is excessive lens excessively bend, and then reduce the problem that molding is bad.
First lens and second lens spacing distance on optical axis are T12, and the second lens and the 3rd lens spacing distance on optical axis are T23, and it meets following condition: 0 < T12/T23 < 0.50.Whereby, contribute to reducing the total length of photo-optic system, to maintain its miniaturization.
First lens thickness on optical axis is CT1, and the 3rd lens thickness on optical axis is CT3, and it meets following condition: 1.16 < CT3/CT1.Whereby, the thickness of lens is comparatively suitable, contributes to the eyeglass homogeneity when making and mouldability, and contributes to maintaining miniaturization.
4th surface, lens image side intersection point on optical axis to the 4th surface, lens image side maximum effective radius position in the horizontal displacement of optical axis be Sag42 (horizontal displacement towards direction, image side then its value be just defined as, if towards thing side to; its value is defined as negative), 4th lens thickness on optical axis is CT4, and it meets following condition: 1.40 < | Sag42 |/CT4.Whereby, can suitably adjust the shape on the 4th surface, lens image side and the thickness of the 4th lens, contribute to revising the aberration of periphery, and reduce the assembling degree of difficulty of photo-optic system to improve yield.Refer to Figure 17, be shown according in Fig. 1 photo-optic system the 4th surface, lens image side intersection point on optical axis to the maximum effective radius position on the 4th surface, lens image side in the horizontal displacement of optical axis.
The abbe number of the 4th lens is V4, and it meets following condition: V4 < 30.Whereby, contribute to revising the aberration of photo-optic system.
In photo-optic system, 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 photo-optic system 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, it is the angle of visual field contributing to expansion system, makes photo-optic system have the advantage of wide-angle lens.
In the photo-optic system that the invention discloses, the material of lens can be plastic cement 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 plastic cement, 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 controlled 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 photo-optic system that the 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 photo-optic system that the invention discloses, the imaging surface (ImageSurface) of photo-optic system, 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 photo-optic system that the 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 image quality.
The present invention more provides a kind of image-taking device, and it comprises aforementioned optical camera chain and sense electronics optical element, and wherein sense electronics optical element is arranged on the imaging surface of photo-optic system.It is preferred that this image-taking device can further include lens barrel (BarrelMember), supports device (HolderMember) or its combination.
Refer to Figure 18, Figure 19 and Figure 20, image-taking device 10 many-side can be applied to intelligent mobile phone (as shown in figure 18), tablet PC (as shown in figure 19) and Wearable device (as shown in figure 20) etc..It is preferred that electronic installation can further include control unit (ControlUnits), display unit (DisplayUnits), storage element (StorageUnits), random access memory (RAM) or its combination.
The present invention more can many-side be applied in the electronic installations such as three-dimensional (3D) image capture, digital camera, mobile device, tablet PC, intelligent TV, network monitoring device, drive recorder, reversing developing unit, somatic sensation television game machine and Wearable device.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 is shown according to the image-taking device schematic diagram of first embodiment of the 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 photo-optic system (not another label) and sense electronics optical element 190.Photo-optic system 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 the 150, the 6th lens 160 by thing side to image side, infrared ray filters filter element (IR-cutFilter) 170 and imaging surface 180.Wherein, sense electronics optical element 190 is arranged on imaging surface 180.The single disengaged lens having refracting power in photo-optic system are six (110-160).First lens the 110, second lens the 120, the 3rd lens the 130, the 4th lens the 140, the 5th lens 150 and the 6th lens 160 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.First lens the 110, second lens the 120, the 3rd lens the 130, the 4th lens the 140, the 5th lens 150 and the 6th lens 160 each other on optical axis without relative movement.
First lens 110 have positive refracting power, and are plastic cement 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 negative refracting power, and are plastic cement 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 positive refracting power, and are plastic cement material, and its thing side surface 131 is convex surface in dipped beam axle place, and its surface, image side 132 is convex surface in dipped beam axle place, and its two surface is all aspheric surface.
4th lens 140 have positive refracting power, and are plastic cement material, and its thing side surface 141 is concave 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.
5th lens 150 have negative refracting power, and are plastic cement material, and its thing side surface 151 is convex 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.
6th lens 160 have negative refracting power, and are plastic cement material, and its thing side surface 161 is convex surface in dipped beam axle place, and its surface, image side 162 is concave surface in dipped beam axle place, and its two surface is all aspheric surface, and its surface, image side 162 has at least one convex surface in off-axis place.
It is glass that infrared ray filters the material of filter element 170, and it is arranged between the 6th lens 160 and imaging surface 180, has no effect on the focal length of photo-optic system.
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 photo-optic system of first embodiment, the focal length of photo-optic system is f, the f-number (F-number) of photo-optic system is Fno, in photo-optic system, the half at maximum visual angle is HFOV, its numerical value is as follows: f=4.32mm (millimeter), Fno=1.47, HFOV=34.9 degree (deg.).
First lens thing side surface the 111 to the 6th surface 162, lens image side distance on optical axis is Td, and the entrance pupil aperture of photo-optic system is EPD, and it meets following condition: Td/EPD=1.61.
The refractive index of the first lens 110 is N1, and it meets following condition: N1=1.544.
The abbe number of the 4th lens 140 is V4, and it meets following condition: V4=23.3.
First lens 110 thickness on optical axis is CT1, and second lens 120 thickness on optical axis is CT2, and it meets following condition: CT1/CT2=3.18.
First lens 110 thickness on optical axis is CT1, and the 3rd lens 130 thickness on optical axis is CT3, and it meets following condition: CT3/CT1=1.20.
Second lens 120 thickness on optical axis is CT2, and the 3rd lens 130 thickness on optical axis is CT3, and the 4th lens 140 thickness on optical axis is CT4, and it meets following condition: CT3/ (CT2+CT4)=1.69.
First lens 110 and second lens 120 spacing distance on optical axis are T12, and the second lens 120 and the 3rd lens 130 spacing distance on optical axis are T23, and it meets following condition: T12/T23=0.18.
4th surface 142, lens image side intersection point on optical axis is Sag42 to the maximum effective radius position on the 4th surface, lens image side 142 in the horizontal displacement of optical axis, 4th lens 140 thickness on optical axis is CT4, and it meets following condition: | Sag42 |/CT4=1.81.
The entrance pupil aperture of photo-optic system is EPD, and second lens 120 thickness on optical axis is CT2, and it meets following condition: EPD/CT2=12.24.
The maximum effective radius of the 6th surface, lens image side 162 is SD62, and the entrance pupil aperture of photo-optic system is EPD, and it meets following condition: SD62/EPD=0.86.
The radius of curvature of the 3rd lens thing side surface 131 is R5, and the radius of curvature on the 3rd surface, lens image side 132 is R6, and it meets following condition: (R5+R6)/(R5-R6)=-0.25.
The focal length of photo-optic system is f, and the radius of curvature of the 3rd lens thing side surface 131 is R5, and the radius of curvature on the 3rd surface, lens image side 132 is R6, and it meets following condition: (f/R5)+(f/R6)=0.51.
The focal length of photo-optic system is f, and the radius of curvature on the 5th surface, lens image side 152 is R10, and it meets following condition: f/R10=2.17.
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=-0.80.
The focal length of the first lens 110 is f1, and the focal length of the 3rd lens 130 is f3, and it meets following condition: f1/f3=1.47.
Coordinate with reference to lower list one and table two.
Table one 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 16 sequentially represents by the surface of thing side to image side.Table two 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 one of first embodiment and table two, and not in this to go forth.
<the second embodiment>
Refer to Fig. 3 and Fig. 4, wherein Fig. 3 is shown according to the image-taking device schematic diagram of second embodiment of the 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 photo-optic system (not another label) and sense electronics optical element 290.Photo-optic system is sequentially comprised the first lens 210 by thing side to image side, aperture the 200, second lens the 220, the 3rd lens the 230, the 4th lens the 240, the 5th lens the 250, the 6th lens 260, infrared ray filter filter element 270 and imaging surface 280.Wherein, sense electronics optical element 290 is arranged on imaging surface 280.The single disengaged lens having refracting power in photo-optic system are six (210-260).First lens the 210, second lens the 220, the 3rd lens the 230, the 4th lens the 240, the 5th lens 250 and the 6th lens 260 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.First lens the 210, second lens the 220, the 3rd lens the 230, the 4th lens the 240, the 5th lens 250 and the 6th lens 260 each other on optical axis without relative movement.
First lens 210 have positive refracting power, and are plastic cement 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 negative refracting power, and are plastic cement 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 positive refracting power, and are plastic cement material, and its thing side surface 231 is convex 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 negative refracting power, and are plastic cement material, and its thing side surface 241 is concave 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.
5th lens 250 have negative refracting power, and are plastic cement material, and its thing side surface 251 is convex 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.
6th lens 260 have negative refracting power, and are plastic cement material, and its thing side surface 261 is concave surface in dipped beam axle place, and its surface, image side 262 is concave surface in dipped beam axle place, and its two surface is all aspheric surface, and its surface, image side 262 has at least one convex surface in off-axis place.
It is glass that infrared ray filters the material of filter element 270, and it is arranged between the 6th lens 260 and imaging surface 280, has no effect on the focal length of photo-optic system.
Please coordinate with reference to lower list three and table four.
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 is shown according to the image-taking device schematic diagram of third embodiment of the 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 photo-optic system (not another label) and sense electronics optical element 390.Photo-optic system 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 the 350, the 6th lens 360 by thing side to image side, infrared ray filters filter element 370 and imaging surface 380.Wherein, sense electronics optical element 390 is arranged on imaging surface 380.The single disengaged lens having refracting power in photo-optic system are six (310-360).First lens the 310, second lens the 320, the 3rd lens the 330, the 4th lens the 340, the 5th lens 350 and the 6th lens 360 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.First lens the 310, second lens the 320, the 3rd lens the 330, the 4th lens the 340, the 5th lens 350 and the 6th lens 360 each other on optical axis without relative movement.
First lens 310 have positive refracting power, and are plastic cement 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 negative refracting power, and are plastic cement 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 positive refracting power, and are plastic cement material, and its thing side surface 331 is convex 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 negative refracting power, and are plastic cement material, and its thing side surface 341 is concave 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.
5th lens 350 have positive refracting power, and are plastic cement material, and its thing side surface 351 is convex 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.
6th lens 360 have negative refracting power, and are plastic cement material, and its thing side surface 361 is convex surface in dipped beam axle place, and its surface, image side 362 is concave surface in dipped beam axle place, and its two surface is all aspheric surface, and its surface, image side 362 has at least one convex surface in off-axis place.
It is glass that infrared ray filters the material of filter element 370, and it is arranged between the 6th lens 360 and imaging surface 380, has no effect on the focal length of photo-optic system.
Please coordinate with reference to lower list five and table six.
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 is shown according to the image-taking device schematic diagram of fourth embodiment of the 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 photo-optic system (not another label) and sense electronics optical element 490.Photo-optic system 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 the 450, the 6th lens 460 by thing side to image side, infrared ray filters filter element 470 and imaging surface 480.Wherein, sense electronics optical element 490 is arranged on imaging surface 480.The single disengaged lens having refracting power in photo-optic system are six (410-460).First lens the 410, second lens the 420, the 3rd lens the 430, the 4th lens the 440, the 5th lens 450 and the 6th lens 460 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.First lens the 410, second lens the 420, the 3rd lens the 430, the 4th lens the 440, the 5th lens 450 and the 6th lens 460 each other on optical axis without relative movement.
First lens 410 have positive refracting power, and are plastic cement material, and its thing side surface 411 is convex surface in dipped beam axle place, and its surface, image side 412 is convex surface in dipped beam axle place, and its two surface is all aspheric surface.
Second lens 420 have negative refracting power, and are plastic cement 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 positive refracting power, and are plastic cement material, and its thing side surface 431 is convex 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 negative refracting power, and are plastic cement material, and its thing side surface 441 is concave 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.
5th lens 450 have positive refracting power, and are plastic cement material, and its thing side surface 451 is convex 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.
6th lens 460 have negative refracting power, and are plastic cement material, and its thing side surface 461 is convex surface in dipped beam axle place, and its surface, image side 462 is concave surface in dipped beam axle place, and its two surface is all aspheric surface, and its surface, image side 462 has at least one convex surface in off-axis place.
It is glass that infrared ray filters the material of filter element 470, and it is arranged between the 6th lens 460 and imaging surface 480, has no effect on the focal length of photo-optic system.
Please coordinate with reference to lower list seven and table eight.
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 is shown according to the image-taking device schematic diagram of fifth embodiment of the 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 photo-optic system (not another label) and sense electronics optical element 590.Photo-optic system 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 the 550, the 6th lens 560 by thing side to image side, infrared ray filters filter element 570 and imaging surface 580.Wherein, sense electronics optical element 590 is arranged on imaging surface 580.The single disengaged lens having refracting power in photo-optic system are six (510-560).First lens the 510, second lens the 520, the 3rd lens the 530, the 4th lens the 540, the 5th lens 550 and the 6th lens 560 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.First lens the 510, second lens the 520, the 3rd lens the 530, the 4th lens the 540, the 5th lens 550 and the 6th lens 560 each other on optical axis without relative movement.
First lens 510 have positive refracting power, and are plastic cement 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 negative refracting power, and are plastic cement 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 cement material, and its thing side surface 531 is convex 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 negative refracting power, and are plastic cement material, and its thing side surface 541 is concave 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.
5th lens 550 have positive refracting power, and are plastic cement material, and its thing side surface 551 is convex 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.
6th lens 560 have negative refracting power, and are plastic cement material, and its thing side surface 561 is convex surface in dipped beam axle place, and its surface, image side 562 is concave surface in dipped beam axle place, and its two surface is all aspheric surface, and its surface, image side 562 has at least one convex surface in off-axis place.
It is glass that infrared ray filters the material of filter element 570, and it is arranged between the 6th lens 560 and imaging surface 580, has no effect on the focal length of photo-optic system.
Please coordinate with reference to lower list nine and table ten.
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 is shown according to the image-taking device schematic diagram of sixth embodiment of the 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 photo-optic system (not another label) and sense electronics optical element 690.Photo-optic system 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 the 650, the 6th lens 660 by thing side to image side, infrared ray filters filter element 670 and imaging surface 680.Wherein, sense electronics optical element 690 is arranged on imaging surface 680.The single disengaged lens having refracting power in photo-optic system are six (610-660).First lens the 610, second lens the 620, the 3rd lens the 630, the 4th lens the 640, the 5th lens 650 and the 6th lens 660 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.First lens the 610, second lens the 620, the 3rd lens the 630, the 4th lens the 640, the 5th lens 650 and the 6th lens 660 each other on optical axis without relative movement.
First lens 610 have positive refracting power, and are plastic cement 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 negative refracting power, and are plastic cement 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 positive refracting power, and are plastic cement material, and its thing side surface 631 is convex surface in dipped beam axle place, and its surface, image side 632 is convex surface in dipped beam axle place, and its two surface is all aspheric surface.
4th lens 640 have negative refracting power, and are plastic cement material, and its thing side surface 641 is concave 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.
5th lens 650 have positive refracting power, and are plastic cement material, and its thing side surface 651 is convex 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.
6th lens 660 have negative refracting power, and are plastic cement material, and its thing side surface 661 is convex surface in dipped beam axle place, and its surface, image side 662 is concave surface in dipped beam axle place, and its two surface is all aspheric surface, and its surface, image side 662 has at least one convex surface in off-axis place.
It is glass that infrared ray filters the material of filter element 670, and it is arranged between the 6th lens 660 and imaging surface 680, has no effect on the focal length of photo-optic system.
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 is shown according to the image-taking device schematic diagram of seventh embodiment of the 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 photo-optic system (not another label) and sense electronics optical element 790.Photo-optic system is sequentially comprised the first lens 710 by thing side to image side, aperture the 700, second lens the 720, the 3rd lens the 730, the 4th lens the 740, the 5th lens the 750, the 6th lens 760, infrared ray filter filter element 770 and imaging surface 780.Wherein, sense electronics optical element 790 is arranged on imaging surface 780.The single disengaged lens having refracting power in photo-optic system are six (710-760).First lens the 710, second lens the 720, the 3rd lens the 730, the 4th lens the 740, the 5th lens 750 and the 6th lens 760 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.First lens the 710, second lens the 720, the 3rd lens the 730, the 4th lens the 740, the 5th lens 750 and the 6th lens 760 each other on optical axis without relative movement.
First lens 710 have positive refracting power, and are plastic cement 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 negative refracting power, and are plastic cement 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 positive refracting power, and are plastic cement material, and its thing side surface 731 is convex surface in dipped beam axle place, and its surface, image side 732 is convex surface in dipped beam axle place, and its two surface is all aspheric surface.
4th lens 740 have negative refracting power, and are plastic cement material, and its thing side surface 741 is concave 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.
5th lens 750 have positive refracting power, and are plastic cement material, and its thing side surface 751 is convex 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.
6th lens 760 have negative refracting power, and are plastic cement material, and its thing side surface 761 is convex surface in dipped beam axle place, and its surface, image side 762 is concave surface in dipped beam axle place, and its two surface is all aspheric surface, and its surface, image side 762 has at least one convex surface in off-axis place.
It is glass that infrared ray filters the material of filter element 770, and it is arranged between the 6th lens 760 and imaging surface 780, has no effect on the focal length of photo-optic system.
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 is shown according to the image-taking device schematic diagram of eighth embodiment of the 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 photo-optic system (not another label) and sense electronics optical element 890.Photo-optic system 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 the 850, the 6th lens 860 by thing side to image side, infrared ray filters filter element 870 and imaging surface 880.Wherein, sense electronics optical element 890 is arranged on imaging surface 880.The single disengaged lens having refracting power in photo-optic system are six (810-860).First lens the 810, second lens the 820, the 3rd lens the 830, the 4th lens the 840, the 5th lens 850 and the 6th lens 860 are respectively provided with an airspace between wantonly two adjacent lens on optical axis.First lens the 810, second lens the 820, the 3rd lens the 830, the 4th lens the 840, the 5th lens 850 and the 6th lens 860 each other on optical axis without relative movement.
First lens 810 have positive refracting power, and are plastic cement 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 cement 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 cement 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 negative refracting power, and are plastic cement material, and its thing side surface 841 is concave 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.
5th lens 850 have positive refracting power, and are plastic cement material, and its thing side surface 851 is convex 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.
6th lens 860 have positive refracting power, and are plastic cement material, and its thing side surface 861 is convex surface in dipped beam axle place, and its surface, image side 862 is concave surface in dipped beam axle place, and its two surface is all aspheric surface, and its surface, image side 862 has at least one convex surface in off-axis place.
It is glass that infrared ray filters the material of filter element 870, and it is arranged between the 6th lens 860 and imaging surface 880, has no effect on the focal length of photo-optic system.
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.
Above-mentioned image-taking device can be equipped in electronic installation.The present invention uses the photo-optic system of six tool refracting power lens.Wherein the first lens and the 3rd lens all have positive refracting power, can the refracting power distribution of balance optical camera chain, and advantageously reduce the sensitivity of photo-optic system.Additionally, the 5th surface, lens image side is concave surface in dipped beam axle place, help avoid refracting power concentrations in the 5th lens, and reduce lens perimeter and make because curvature is excessive lens excessively bend, and then reduce the problem that molding is bad.Furthermore, 6th lens image side surface is concave surface in dipped beam axle place, and the 6th lens image side surface be convex surface in off-axis place, contribute to the principal point making photo-optic system away from image side end, and then effectively shorten the total length of photo-optic system, be beneficial to the miniaturization of photo-optic system, further can modified off-axis aberration to promote periphery image quality.When a specific condition is satisfied, contribute to the refracting power balanced arrangement making the first lens and the 3rd lens, be effectively reduced the generation of aberration.So, the photo-optic system of the present invention can have the characteristic of large aperture, good optical aberration correcting and miniaturization concurrently simultaneously.
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. a photo-optic system, 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 refracting power；
One the 3rd lens, have positive refracting power；
One the 4th lens, have refracting power；
One the 5th lens, have refracting power, and its surface, image side is concave surface in dipped beam axle place, and its thing side surface and surface, image side are all aspheric surface；And
One the 6th lens, have refracting power, 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 this photo-optic system are six, these first lens, these second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens are respectively provided with an airspace between wantonly two adjacent lens on optical axis, these first lens, these second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens each other on optical axis without relative movement, this photo-optic system more comprises an aperture, and this aperture is arranged between an object and the 3rd lens；
Wherein, the maximum effective radius of the 6th surface, lens image side is SD62, the entrance pupil aperture of this photo-optic system is EPD, the focal length of these the first lens is f1, the focal length of the 3rd lens is f3, to the 6th surface, lens image side, the distance on optical axis is Td to this first lens thing side surface, and it meets following condition:
0.6<SD62/EPD<1.1；
0.80<f1/f3；And
Td/EPD<1.95。
2. photo-optic system according to claim 1, it is characterised in that the refractive index of these the first lens is N1, and it meets following condition:
1.40<N1<1.65。
3. photo-optic system according to claim 2, it is characterised in that the f-number of this photo-optic system is Fno, and it meets following condition:
Fno<1.75。
4. photo-optic system according to claim 3, it is characterised in that this second lens thickness on optical axis is CT2, and the 3rd lens thickness on optical axis is CT3, and the 4th lens thickness on optical axis is CT4, and it meets following condition:
1.0<CT3/(CT2+CT4)。
5. photo-optic system according to claim 1, it is characterised in that the focal length of these the first lens is f1, the focal length of these the second lens is f2, and it meets following condition:
-1.0<f1/f2<0。
6. photo-optic system according to claim 5, it is characterised in that the radius of curvature of the 3rd lens thing side surface is R5, the radius of curvature on the 3rd surface, lens image side is R6, and it meets following condition:
(R5+R6)/(R5-R6)<0.50。
7. photo-optic system according to claim 1, it is characterised in that these second lens have negative refracting power, and the 4th lens have negative refracting power.
8. photo-optic system according to claim 7, it is characterised in that the focal length of this photo-optic system is f, the radius of curvature of the 3rd lens thing side surface is R5, and the radius of curvature on the 3rd surface, lens image side is R6, and it meets following condition:
-1.0<(f/R5)+(f/R6)<1.0。
9. photo-optic system according to claim 7, it is characterised in that the 5th lens have positive refracting power.
10. photo-optic system according to claim 1, it is characterised in that the focal length of these the first lens is f1, and the focal length of the 3rd lens is f3, and it meets following condition:
0.95<f1/f3。
11. photo-optic system according to claim 1, it is characterised in that the f-number of this photo-optic system is Fno, and it meets following condition:
Fno<1.55。
12. photo-optic system according to claim 1, it is characterised in that the focal length of this photo-optic system is f, the radius of curvature on the 5th surface, lens image side is R10, and it meets following condition:
0.55<f/R10<3.0。
13. photo-optic system according to claim 1, it is characterised in that these first lens and this second lens spacing distance on optical axis are T12, these second lens and the 3rd lens spacing distance on optical axis are T23, and it meets following condition:
0<T12/T23<0.50。
14. photo-optic system according to claim 1, it is characterised in that this first lens thickness on optical axis is CT1, and the 3rd lens thickness on optical axis is CT3, and it meets following condition:
1.16<CT3/CT1。
15. photo-optic system according to claim 1, it is characterized in that, 4th surface, lens image side is convex surface in dipped beam axle place, 4th surface, lens image side intersection point on optical axis is Sag42 to the maximum effective radius position on the 4th surface, lens image side in the horizontal displacement of optical axis, 4th lens thickness on optical axis is CT4, and it meets following condition:
1.40<|Sag42|/CT4。
16. photo-optic system according to claim 1, it is characterised in that the entrance pupil aperture of this photo-optic system is EPD, this second lens thickness on optical axis is CT2, and it meets following condition:
9.5<EPD/CT2。
17. photo-optic system according to claim 1, it is characterised in that this surface, the first lens image side is concave surface in dipped beam axle place.
18. photo-optic system according to claim 1, it is characterised in that the abbe number of the 4th lens is V4, it meets following condition:
V4<30。
19. an image-taking device, it is characterised in that comprise:
Photo-optic system as claimed in claim 1；And
One sense electronics optical element, wherein, this sense electronics optical element is arranged on an imaging surface of this photo-optic system.
20. an electronic installation, it is characterised in that comprise:
Image-taking device as claimed in claim 19.
21. a photo-optic system, 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, and these first lens are plastic cement material；
One second lens, have refracting power；
One the 3rd lens, have positive refracting power；
One the 4th lens, have refracting power；
One the 5th lens, have refracting power, and its surface, image side is concave surface in dipped beam axle place, and its thing side surface and surface, image side are all aspheric surface；And
One the 6th lens, have refracting power, 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 this photo-optic system are six, these first lens, these second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens are respectively provided with an airspace between wantonly two adjacent lens on optical axis, these first lens, these second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens each other on optical axis without relative movement, this photo-optic system more comprises an aperture, and this aperture is arranged between an object and the 3rd lens；
Wherein, the maximum effective radius of the 6th surface, lens image side is SD62, the entrance pupil aperture of this photo-optic system is EPD, the focal length of this photo-optic system is f, the focal length of these the first lens is f1, the focal length of the 3rd lens is f3, to the 6th surface, lens image side, the distance on optical axis is Td to this first lens thing side surface, the radius of curvature of the 3rd lens thing side surface is R5, the radius of curvature of the 3rd surface, lens image side is R6, this the first lens thickness on optical axis is CT1, this the second lens thickness on optical axis is CT2, it meets following condition:
0.6<SD62/EPD<1.33；
0.80<f1/f3；
Td/EPD<2.15；
-1.125<(f/R5)+(f/R6)；
1.45<CT1/CT2；And
8.25<EPD/CT2。
22. photo-optic system according to claim 21, it is characterised in that the focal length of these the first lens is f1, the focal length of these the second lens is f2, and it meets following condition:
-1.0<f1/f2。
23. photo-optic system according to claim 21, it is characterised in that the f-number of this photo-optic system is Fno, and it meets following condition:
Fno<1.75。
24. photo-optic system according to claim 23, it is characterised in that the 4th lens have negative refracting power, and the 5th lens have positive refracting power.
25. photo-optic system according to claim 23, it is characterised in that these first lens and this second lens spacing distance on optical axis are T12, these second lens and the 3rd lens spacing distance on optical axis are T23, and it meets following condition:
0<T12/T23<0.50。
26. photo-optic system according to claim 21, it is characterised in that the focal length of this photo-optic system is f, the radius of curvature on the 5th surface, lens image side is R10, and it meets following condition:
0.55<f/R10<3.0。
27. photo-optic system according to claim 21, it is characterized in that, 4th surface, lens image side is convex surface in dipped beam axle place, 4th surface, lens image side intersection point on optical axis is Sag42 to the maximum effective radius position on the 4th surface, lens image side in the horizontal displacement of optical axis, 4th lens thickness on optical axis is CT4, and it meets following condition:
1.40<|Sag42|/CT4。
28. photo-optic system according to claim 21, it is characterised in that the radius of curvature of the 3rd lens thing side surface is R5, the radius of curvature on the 3rd surface, lens image side is R6, and it meets following condition:
(R5+R6)/(R5-R6)<0.50。
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| CN201410834916.7A CN105807406B (en) | 2014-12-29 | 2014-12-29 | Photo-optic system, image-taking device and electronic installation |
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| CN201410834916.7A CN105807406B (en) | 2014-12-29 | 2014-12-29 | Photo-optic system, image-taking device and electronic installation |
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