CN105824107A - Optical image capturing system, image capturing device and electronic device - Google Patents
Optical image capturing system, image capturing device and electronic device Download PDFInfo
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Abstract
The invention discloses an optical image capturing system, an image capturing device and an electronic device. The optical image capturing system comprises a first lens, a second lens and a third lens, which have refractive power, in sequence from the object side to the image side, wherein the first lens has positive refractive power, the object-side surface of the first lens is convex at a paraxial region, the image-side surface of the first lens is convex at the paraxial region, and the two surfaces are aspheric surface and made of a plastic material; the second lens has positive refractive power, the image-side surface of the second lens is concave at the paraxial region, the image-side surface of the second lens is convex at the paraxial region, and the two surfaces are aspheric surfaces and made of a plastic material; the third lens has negative refractive power, the image-side surface of the third lens is concave at the paraxial region, the image-side surface of the third lens has at least one convex surface at an off-axis region, and the two surfaces are aspheric surfaces and made of a plastic material. The optical image capturing system has three lenses with refractive power. The optical image capturing system further comprises an aperture which is arranged between the image-side surface of the first lens and the object-side surface of the second lens. The invention further discloses an image capturing device provided with the optical image capturing system and an electronic device provided with the image capturing device.
Description
Technical field
The present invention relates to a kind of optical image taking system, image-taking device and electronic installation, particularly to a kind of optical image taking system being applicable to 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 the photo-sensitive cell of general 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 as development trend, therefore, the miniaturization photographic lens possessing good image quality becomes main flow in the market.
The high pixel miniaturization photographic lens that tradition is equipped on electronic installation, many employing two-chip type lens arrangements are main, but owing to high-order intelligent mobile phone (SmartPhone), Wearable device (WearableDevice), tablet PC (TabletPersonalComputer) are prevailing with the high standard mobile devices such as infrared photographic lens, driving the requirement in pixel with image quality of the miniaturization pick-up lens to promote, existing two-chip type lens group will be unable to meet the demand of higher order.
Although there being development general tradition three-chip type optical system at present, but the refracting power configuration inequality in existing optical system, the back focal length easily making optical system is long, is unfavorable for the miniaturization of optical system.Further, it is likely to result in refracting power concentrations in single lens, and is an impediment to revise the aberration of optical system and reduce the sensitivity of optical system.
Summary of the invention
It is an object of the invention to provide a kind of optical image taking system, image-taking device and electronic installation, the first lens that wherein optical image taking system comprises the positive refracting power of tool, the second lens having positive refracting power and the 3rd lens of the negative refracting power of tool, and the refracting power of the 3rd lens is strong compared with the first lens and the second lens.Whereby, overall length and the back focal length of optical image taking system can effectively be shortened.Additionally, when meeting specified conditions, contribute to making the refracting power configuration of lens in optical image taking system more to balance, to revise the aberration of optical image taking system, and reduce the sensitivity of optical image taking system.Furthermore, the first lens thing side surface and surface, image side are all convex surface, can the curvature distribution of active balance the first lens, help avoid the first single surface curvature of lens too strong, to reduce the generation of optical image taking system aberration, and reduce difficult forming degree.
The present invention provides a kind of optical image taking system, thing side to image side sequentially comprise the first lens, the second lens and the 3rd lens.First lens have positive refracting power, and its thing side surface is convex surface at dipped beam axle, and its surface, image side is convex surface at dipped beam axle, and its thing side surface and surface, image side are all aspheric surface, and the first lens are plastic cement material.Second lens have positive refracting power, and its thing side surface is concave surface at dipped beam axle, and its surface, image side is convex surface at dipped beam axle, and its thing side surface and surface, image side are all aspheric surface, and the second lens are plastic cement material.3rd lens have negative refracting power, and its surface, image side is concave surface at dipped beam axle, and its off-axis place, surface, image side has at least one convex surface, and its thing side surface and surface, image side are all aspheric surface, and the 3rd lens are plastic cement material.The lens having refracting power in optical image taking system are three.Optical image taking system further includes an aperture, and aperture is arranged between the first surface, lens image side and the second lens thing side surface.The focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the 3rd lens is f3, first lens thickness on optical axis is CT1,3rd lens thickness on optical axis is CT3, to the 3rd surface, lens image side, the distance on optical axis is SD to aperture, and the first lens thing side surface to the 3rd surface, lens image side distance on optical axis is TD, and it meets following condition:
|f3|<f2<f1；
1.55<CT1/CT3；And
0.55<SD/TD<0.80。
The present invention separately provides a kind of optical image taking system, thing side to image side sequentially comprise the first lens, the second lens and the 3rd lens.First lens have positive refracting power, and its thing side surface is convex surface at dipped beam axle, and its surface, image side is convex surface at dipped beam axle, and its thing side surface and surface, image side are all aspheric surface, and the first lens are plastic cement material.Second lens have positive refracting power, and its thing side surface is concave surface at dipped beam axle, and its surface, image side is convex surface at dipped beam axle, and its thing side surface and surface, image side are all aspheric surface, and the second lens are plastic cement material.3rd lens have negative refracting power, and its surface, image side is concave surface at dipped beam axle, and its off-axis place, surface, image side has at least one convex surface, and its thing side surface and surface, image side are all aspheric surface, and the 3rd lens are plastic cement material.The lens having refracting power in optical image taking system are three.Optical image taking system further includes a filter element.In first lens, the second lens, the 3rd lens and filter element, at least one of which is for absorbing made by visible ray material.The focal length of the first lens is f1, and the focal length of the second lens is f2, and the focal length of the 3rd lens is f3, and first lens thickness on optical axis is CT1, and the 3rd lens thickness on optical axis is CT3, and it meets following condition:
|f3|<f2<f1；And
1.25<CT1/CT3。
The present invention separately provides a kind of image-taking device, and it comprises aforesaid optical image taking system and sense electronics optical element, and wherein sense electronics optical element is arranged on the imaging surface of optical image taking system.
The present invention separately provides a kind of electronic installation, and it comprises aforesaid image-taking device.
When | f3 | < f2 < when f1 meets above-mentioned condition, contributes to making the refracting power configuration of lens in optical image taking system more to balance, to revise the aberration of optical image taking system, and reduces the sensitivity of optical image taking system.
When CT1/CT3 meets above-mentioned condition, the thickness of the first lens and the 3rd lens is more suitable, contributes to the lens homogeneity when making and mouldability.
When SD/TD meets above-mentioned condition, the design of Optical System of optical image taking system can be made to obtain well balanced in telecentricity (Telecentric) with Radix Rumicis characteristic.
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 illustrates the image-taking device schematic diagram according to 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 illustrates the image-taking device schematic diagram according to 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 the penetration rate spectrum of the 3rd lens of the second embodiment；
Fig. 6 be the second embodiment the first lens, the second lens and the penetration rate spectrum of filter element；
Fig. 7 is the penetration rate spectrum of the optical image taking system of the second embodiment；
Fig. 8 illustrates the image-taking device schematic diagram according to third embodiment of the invention；
Fig. 9 is sequentially the spherical aberration of the 3rd embodiment, astigmatism and distortion curve figure from left to right；
Figure 10 illustrates the image-taking device schematic diagram according to fourth embodiment of the invention；
Figure 11 is sequentially the spherical aberration of the 4th embodiment, astigmatism and distortion curve figure from left to right；
Figure 12 illustrates the image-taking device schematic diagram according to fifth embodiment of the invention；
Figure 13 is sequentially the spherical aberration of the 5th embodiment, astigmatism and distortion curve figure from left to right；
Figure 14 illustrates the image-taking device schematic diagram according to sixth embodiment of the invention；
Figure 15 is sequentially the spherical aberration of sixth embodiment, astigmatism and distortion curve figure from left to right；
Figure 16 illustrates the image-taking device schematic diagram according to seventh embodiment of the invention；
Figure 17 is sequentially the spherical aberration of the 7th embodiment, astigmatism and distortion curve figure from left to right；
Figure 18 illustrates the image-taking device schematic diagram according to eighth embodiment of the invention；
Figure 19 is sequentially the spherical aberration of the 8th embodiment, astigmatism and distortion curve figure from left to right；
Figure 20 illustrates the schematic diagram of a kind of electronic installation according to the present invention；
Figure 21 illustrates the schematic diagram of the another kind of electronic installation according to the present invention；
Figure 22 illustrates the schematic diagram of the still another electronic installation according to the present invention；
Figure 23 illustrates the schematic diagram of the still another electronic installation according to the present invention.
Wherein, reference
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
Filter element 140,240,340,440,540,640,740,840
Imaging surface 150,250,350,450,550,650,750,850
Sense electronics optical element 160,260,360,460,560,660,760,860
CT1: the first lens thickness on optical axis
CT3: the three lens thickness on optical axis
The entrance pupil aperture of EPD: optical image taking system
The focal length of f: optical image taking 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 optical image taking system
The half at maximum visual angle in HFOV optical image taking system
The refractive index of the N2: the second lens
The refractive index of the N3: the three lens
The radius of curvature of the R2: the first surface, lens image side
SD: aperture is the distance on optical axis to the 3rd surface, lens image side
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 to the 3rd surface, lens image side distance on optical axis
TL: the first lens thing side surface is to imaging surface distance on optical axis
The abbe number of the V2: the second lens
The abbe number of the V3: the three lens
Σ the CT: the first lens, the second lens and the 3rd lens summation of lens thickness on optical axis
Detailed description of the invention
Structural principle and operation principle to the present invention are described in detail below in conjunction with the accompanying drawings:
Optical image taking system is sequentially comprised the first lens, the second lens and the 3rd lens by thing side to image side.Wherein, the lens having refracting power in optical image taking system are three.
First lens have positive refracting power, and its thing side surface is convex surface at dipped beam axle, and its surface, image side is convex surface at dipped beam axle.Whereby, it is possible to provide the positive refracting power needed for optical image taking system, and contribute to suitably adjusting the total length of optical image taking system.Additionally, due to the first lens thing side surface and surface, image side are all convex surface, can the curvature distribution of active balance the first lens, help avoid the first single surface curvature of lens too strong, to reduce the generation of optical image taking system aberration, and reduce difficult forming degree.
Second lens have positive refracting power, and its thing side surface is concave surface at dipped beam axle, and its surface, image side is convex surface at dipped beam axle.Whereby, the first lens and the second lens all have positive refracting power, contribute to being uniformly distributed the refracting power of optical image taking system, to reduce the sensitivity of optical image taking system.Additionally, the back focal length of optical image taking system can effectively be reduced, optical image taking system is made to maintain miniaturization.
3rd lens have negative refracting power, and its thing side surface can be concave surface at dipped beam axle, and its surface, image side is concave surface at dipped beam axle, and its surface, image side has at least one convex surface in off-axis place.Whereby, the first lens of optical image taking system, the second lens and the 3rd lens forming positive-negative structure, and the refracting power of the 3rd lens relatively the first lens and the second lens are by force, can effectively shorten overall length and the back focal length of optical image taking system.Additionally, the light of the off-axis visual field angle on sense electronics optical element, to increase the receiving efficiency of sense electronics optical element, the aberration of further modified off-axis visual field can be suppressed.
The focal length of the first lens is f1, and the focal length of the second lens is f2, and the focal length of the 3rd lens is f3, and it meets following condition: | f3 | < f2 < f1.Whereby, contribute to making the refracting power configuration of lens in optical image taking system more to balance, to revise the aberration of optical image taking system, and reduce the sensitivity of optical image taking system.
First lens thickness on optical axis is CT1, and the 3rd lens thickness on optical axis is CT3, and it meets following condition: 1.25 < CT1/CT3.Whereby, the thickness of the first lens and the 3rd lens is more suitable, contributes to the lens homogeneity when making and mouldability.It is preferred that it meets following condition: 1.55 < CT1/CT3.More preferably, it meets following condition: 1.80 < CT1/CT3 < 4.50.The most more preferably, it meets following condition: 2.40 < CT1/CT3 < 3.50.
Optical image taking system further includes an aperture.To the 3rd surface, lens image side, the distance on optical axis is SD to aperture, and the first lens thing side surface to the 3rd surface, lens image side distance on optical axis is TD, and it meets following condition: 0.55 < SD/TD < 0.80.Whereby, the design of Optical System that can make optical image taking system obtains well balanced in telecentricity (Telecentric) with Radix Rumicis characteristic.
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: 2.5 < T12/T23.Whereby, can suitably adjust the spacing between each lens, contribute to shortening the total length of optical image taking system, to maintain its miniaturization.
First lens, the second lens and the 3rd lens summation of lens thickness on optical axis are Σ CT (being first lens thickness on optical axis, the second lens thickness on optical axis and the summation of the 3rd lens thickness on optical axis), first lens thickness on optical axis is CT1, and it meets following condition: 1.40 < Σ CT/CT1 < 2.60.Whereby, lens can be avoided to cross thin or blocked up, be conducive to maintaining the miniaturization of optical image taking system, promote simultaneously and make yield.
The abbe number of the second lens is V2, and the abbe number of the 3rd lens is V3, and it meets following condition: 0.80 < V2/V3 < 1.33.Whereby, the selection of plastic lens material in optical image taking system can be made more to mate, be beneficial to the image quality of improving optical image-taking system.
The first lens thing side surface to the 3rd surface, lens image side distance on optical axis is TD, and it meets following condition: TD < 2.25mm (millimeter).Whereby, the beneficially miniaturization of optical image taking system, to avoid optical image taking system volume excessive, make optical image taking system be more suitably applied to electronic installation.
The abbe number of the second lens is V2, and the abbe number of the 3rd lens is V3, and it meets following condition: V2+V3 < 70.Whereby, the selection of plastic lens material in optical image taking system can be made more to mate, be beneficial to the image quality of improving optical image-taking system.
The refractive index of the second lens is N2, and the refractive index of the 3rd lens is N3, and it meets following condition: 3.00 < N2+N3 < 3.40.Whereby, the refractive index of the second lens and the 3rd lens is more suitable, is conducive to revising the aberration of optical image taking system, maintains good image quality simultaneously.
First lens thing side surface is TL to imaging surface distance on optical axis, and the entrance pupil aperture of optical image taking system is EPD, and it meets following condition: 1.0 < TL/EPD < 3.4.Whereby, the light-inletting quantity of optical image taking system can be increased, be conducive to the capture photoperceptivity promoting under low lighting environment.
The focal length of the first lens is f1, and the focal length of the second lens is f2, and the focal length of the 3rd lens is f3, and it meets following condition: 1.25 < (| f3 |/f2)+(f2/f1) < 1.85.Whereby, can the refracting power configuration of balance optical image-taking system, to avoid aberration excessively to produce, can effectively reduce the sensitivity of optical image taking system simultaneously.
The focal length of the first lens is f1, and the radius of curvature on the first surface, lens image side is R2, and it meets following condition :-1.5 < f1/R2 < 0.Whereby, the curvature on the first surface, lens image side is appropriate, contributes to shortening the total length of optical image taking system.
The optical image taking system of the present invention can be used in wavelength 750 nanometer (nm) in the wave band of 1050 nanometers.Whereby, can effectively capture infrared wavelength range light, to be applicable to the various infrared photography application such as the detection of dynamic body-sensing, the shooting of low light source or iris device for identifying.
Optical image taking system further includes a filter element.In first lens, the second lens, the 3rd lens and filter element, at least one of which can be for absorbing made by visible ray material.Absorb visible ray material and for example, contaminate black plastics.Whereby, lens or optical filter are optionally made by optical image taking system to absorb visible ray material, make lens or optical filter can effectively reduce the penetrance of visible light wave range light source, to reduce the visible light wave range impact on image quality.
In optical image taking system, the configuration of aperture puts aperture in can being.In put aperture and represent that aperture is arranged between the first lens and imaging surface, contribute to the angle of visual field providing optical image taking system enough.
In the optical image taking system that the invention discloses, the material of lens can be plastic cement or glass.When the material of lens is glass, the degree of freedom of refracting power configuration can be increased.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 optical image taking 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 at dipped beam axle；If lens surface is concave surface and when not defining this concave surface position, then it represents that this lens surface is concave surface at dipped beam axle.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 lens refracting power at dipped beam axle or focal length.
In the optical image taking system that the invention discloses, the imaging surface (ImageSurface) of optical image taking system, according to the difference of 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 image taking 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 image-taking system and sense electronics optical element, and wherein sense electronics optical element is arranged on the imaging surface of optical image taking system.It is preferred that this image-taking device can further include lens barrel (BarrelMember), supports device (HolderMember) or a combination thereof.
Refer to Figure 20, Figure 21, Figure 22 and Figure 23, image-taking device 10 many-side can be applied to intelligent mobile phone (as shown in figure 20), tablet PC (as shown in figure 21), Wearable device (as shown in figure 22) and infrared photographic device (as shown in figure 23) etc..It is preferred that electronic installation can further include control unit (ControlUnits), display unit (DisplayUnits), storage element (StorageUnits), temporary storage element (RAM) or a combination thereof.
The more visual demand of optical image taking system 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 be in the electronic installation such as many-side is applied to three-dimensional (3D) image capture, digital camera, mobile device, tablet PC, intelligent electric regard, network monitoring device, drive recorder, reversing developing unit, somatic sensation television game machine and Wearable device.The optical image taking system 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, the shooting of low light source or iris device for identifying etc. need the electronic installation etc. of avoiding infrared ray to disturb.Furthermore, it is understood that the optical image taking system of the present invention can be used in wavelength 750 nanometer in the wave band of 1050 nanometers, but this wavelength band be not used to limit 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 the image-taking device schematic diagram according to 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 optical image taking system (not another label) and sense electronics optical element 160.Optical image taking system is sequentially comprised the first lens 110, aperture the 100, second lens the 120, the 3rd lens 130, filter element (Filter) 140 and imaging surface 150 by thing side to image side.Wherein, sense electronics optical element 160 is arranged on imaging surface 150.The lens having refracting power in optical image taking system are three (110-130).
First lens 110 have positive refracting power, and are plastic cement material, and its thing side surface 111 is convex surface at dipped beam axle, and its surface, image side 112 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
Second lens 120 have positive refracting power, and are plastic cement material, and its thing side surface 121 is concave surface at dipped beam axle, and its surface, image side 122 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
3rd lens 130 have negative refracting power, and are plastic cement material, and its thing side surface 131 is concave surface at dipped beam axle, and its surface, image side 132 is concave surface at dipped beam axle, and its two surface is all aspheric surface, and its surface, image side 132 has at least one convex surface in off-axis place.
The material of filter element 140 is glass, and it is arranged between the 3rd lens 130 and imaging surface 150, has no effect on the focal length of optical image taking 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 the relative distance of the tangent plane of intersection point on aspheric surface optical axis；
Y: the point in aspheric curve and the vertical dimension of optical axis；
R: radius of curvature；
K: conical surface coefficient；And
Ai: the i-th rank asphericity coefficient.
In the optical image taking system of first embodiment, the focal length of optical image taking system is f, the f-number (F-number) of optical image taking system is Fno, in optical image taking system, the half at maximum visual angle is HFOV, its numerical value is as follows: f=2.12mm (millimeter), Fno=2.85, HFOV=31.3 degree (deg.).
The refractive index of the second lens 120 is N2, and the refractive index of the 3rd lens 130 is N3, and it meets following condition: N2+N3=3.222.
The abbe number of the second lens 120 is V2, and the abbe number of the 3rd lens 130 is V3, and it meets following condition: V2+V3=53.70.
The abbe number of the second lens 120 is V2, and the abbe number of the 3rd lens 130 is V3, and it meets following condition: V2/V3=1.29.
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: CT1/CT3=2.02.
First lens the 110, second lens 120 and the 3rd lens 130 summation of lens thickness on optical axis are Σ CT, and first lens 110 thickness on optical axis is CT1, and it meets following condition: Σ CT/CT1=2.66.
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=4.83.
The focal length of the first lens 110 is f1, and the radius of curvature on the first surface, lens image side 112 is R2, and it meets following condition: f1/R2=-0.34.
The focal length of the first lens 110 is f1, and the focal length of the second lens 120 is f2, and the focal length of the 3rd lens 130 is f3, and it meets following condition: (| f3 |/f2)+(f2/f1)=1.41.
First lens thing side surface 111 to the 3rd surface 132, lens image side distance on optical axis is TD, and it meets following condition: TD=2.05mm.
To the 3rd surface 132, lens image side, the distance on optical axis is SD to aperture 100, and first lens thing side surface 111 to the 3rd surface 132, lens image side distance on optical axis is TD, and it meets following condition: SD/TD=0.66.
First lens thing side surface 111 to the imaging surface 150 distance on optical axis is TL, and the entrance pupil aperture of optical image taking system is EPD, and it meets following condition: TL/EPD=3.87.
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 millimeter (mm), and surface 0 to 10 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 illustrates the image-taking device schematic diagram according to 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 optical image taking system (not another label) and sense electronics optical element 260.Optical image taking system is sequentially comprised the first lens 210, aperture the 200, second lens the 220, the 3rd lens 230, filter element 240 and imaging surface 250 by thing side to image side.Wherein, sense electronics optical element 260 is arranged on imaging surface 250.The lens having refracting power in optical image taking system are three (210-230).
First lens 210 have positive refracting power, and are plastic cement material, and its thing side surface 211 is convex surface at dipped beam axle, and its surface, image side 212 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
Second lens 220 have positive refracting power, and are plastic cement material, and its thing side surface 221 is concave surface at dipped beam axle, and its surface, image side 222 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
3rd lens 230 have negative refracting power, and are plastic cement material, and its thing side surface 231 is concave surface at dipped beam axle, and its surface, image side 232 is concave surface at dipped beam axle, and its two surface is all aspheric surface, and its surface, image side 232 has at least one convex surface in off-axis place.
The material of filter element 240 is glass, and it is arranged between the 3rd lens 230 and imaging surface 250, has no effect on the focal length of optical image taking system.
In a second embodiment, the 3rd lens 230 are for absorbing made by visible ray material, and first lens the 210, second lens 220 and filter element 240 are made by non-absorbing visible ray material.Whereby, the 3rd lens 230 can effectively reduce the penetrance of visible light wave range light source.Furthermore, in a second embodiment, the 3rd lens 230 that absorption visible ray material is made can absorb the wave band (i.e. visible light wave range) of wavelength 400nm～700nm, and make the penetrance of visible light wave range less than 50%.Whereby, optical image taking system is applicable to the wave band of wavelength about 810nm.Refer to Fig. 5, Fig. 6 and Fig. 7.Fig. 5 is the penetration rate spectrum of the 3rd lens of the second embodiment.Fig. 6 is the first lens of the second embodiment, the second lens and the penetrance of filter element
Spectrum.Fig. 7 is the penetration rate spectrum of the optical image taking system of the second embodiment.
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. 8 and Fig. 9, wherein Fig. 8 illustrates the image-taking device schematic diagram according to third embodiment of the invention, and Fig. 9 is sequentially the spherical aberration of the 3rd embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 8, image-taking device comprises optical image taking system (not another label) and sense electronics optical element 360.Optical image taking system is sequentially comprised the first lens 310, aperture the 300, second lens the 320, the 3rd lens 330, filter element 340 and imaging surface 350 by thing side to image side.Wherein, sense electronics optical element 360 is arranged on imaging surface 350.The lens having refracting power in optical image taking system are three (310-330).
First lens 310 have positive refracting power, and are plastic cement material, and its thing side surface 311 is convex surface at dipped beam axle, and its surface, image side 312 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
Second lens 320 have positive refracting power, and are plastic cement material, and its thing side surface 321 is concave surface at dipped beam axle, and its surface, image side 322 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
3rd lens 330 have negative refracting power, and are plastic cement material, and its thing side surface 331 is convex surface at dipped beam axle, and its surface, image side 332 is concave surface at dipped beam axle, and its two surface is all aspheric surface, and its surface, image side 332 has at least one convex surface in off-axis place.
The material of filter element 340 is glass, and it is arranged between the 3rd lens 330 and imaging surface 350, has no effect on the focal length of optical image taking 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 Figure 10 and Figure 11, wherein Figure 10 illustrates the image-taking device schematic diagram according to fourth embodiment of the invention, and Figure 11 is sequentially the spherical aberration of the 4th embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 10, image-taking device comprises optical image taking system (not another label) and sense electronics optical element 460.Optical image taking system is sequentially comprised the first lens 410, aperture the 400, second lens the 420, the 3rd lens 430, filter element 440 and imaging surface 450 by thing side to image side.Wherein, sense electronics optical element 460 is arranged on imaging surface 450.The lens having refracting power in optical image taking system are three (410-430).
First lens 410 have positive refracting power, and are plastic cement material, and its thing side surface 411 is convex surface at dipped beam axle, and its surface, image side 412 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
Second lens 420 have positive refracting power, and are plastic cement material, and its thing side surface 421 is concave surface at dipped beam axle, and its surface, image side 422 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
3rd lens 430 have negative refracting power, and are plastic cement material, and its thing side surface 431 is concave surface at dipped beam axle, and its surface, image side 432 is concave surface at dipped beam axle, and its two surface is all aspheric surface, and its surface, image side 432 has at least one convex surface in off-axis place.
The material of filter element 440 is glass, and it is arranged between the 3rd lens 430 and imaging surface 450, has no effect on the focal length of optical image taking 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 Figure 12 and Figure 13, wherein Figure 12 illustrates the image-taking device schematic diagram according to fifth embodiment of the invention, and Figure 13 is sequentially the spherical aberration of the 5th embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 12, image-taking device comprises optical image taking system (not another label) and sense electronics optical element 560.Optical image taking system is sequentially comprised the first lens 510, aperture the 500, second lens the 520, the 3rd lens 530, filter element 540 and imaging surface 550 by thing side to image side.Wherein, sense electronics optical element 560 is arranged on imaging surface 550.The lens having refracting power in optical image taking system are three (510-530).
First lens 510 have positive refracting power, and are plastic cement material, and its thing side surface 511 is convex surface at dipped beam axle, and its surface, image side 512 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
Second lens 520 have positive refracting power, and are plastic cement material, and its thing side surface 521 is concave surface at dipped beam axle, and its surface, image side 522 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
3rd lens 530 have negative refracting power, and are plastic cement material, and its thing side surface 531 is convex surface at dipped beam axle, and its surface, image side 532 is concave surface at dipped beam axle, and its two surface is all aspheric surface, and its surface, image side 532 has at least one convex surface in off-axis place.
The material of filter element 540 is glass, and it is arranged between the 3rd lens 530 and imaging surface 550, has no effect on the focal length of optical image taking system.
In the 5th embodiment, the first lens 510 are for absorbing made by visible ray material, and the second lens the 520, the 3rd lens 530 and filter element 540 are made by non-absorbing visible ray material.Whereby, the first lens 510 can absorb the wave band (i.e. visible light wave range) of wavelength 400nm～700nm, and make optical image taking system be applicable to the wave band of wavelength about 810nm.
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 14 and Figure 15, wherein Figure 14 illustrates the image-taking device schematic diagram according to sixth embodiment of the invention, and Figure 15 is sequentially the spherical aberration of sixth embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 14, image-taking device comprises optical image taking system (not another label) and sense electronics optical element 660.Optical image taking system is sequentially comprised the first lens 610, aperture the 600, second lens the 620, the 3rd lens 630, filter element 640 and imaging surface 650 by thing side to image side.Wherein, sense electronics optical element 660 is arranged on imaging surface 650.The lens having refracting power in optical image taking system are three (610-630).
First lens 610 have positive refracting power, and are plastic cement material, and its thing side surface 611 is convex surface at dipped beam axle, and its surface, image side 612 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
Second lens 620 have positive refracting power, and are plastic cement material, and its thing side surface 621 is concave surface at dipped beam axle, and its surface, image side 622 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
3rd lens 630 have negative refracting power, and are plastic cement material, and its thing side surface 631 is convex surface at dipped beam axle, and its surface, image side 632 is concave surface at dipped beam axle, and its two surface is all its surface, image side 632 of aspheric surface and has at least one convex surface in off-axis place.
The material of filter element 640 is glass, and it is arranged between the 3rd lens 630 and imaging surface 650, has no effect on the focal length of optical image taking system.
In the sixth embodiment, the first lens 610 are for absorbing made by visible ray material, and the second lens the 620, the 3rd lens 630 and filter element 640 are made by non-absorbing visible ray material.Whereby, the first lens 610 can absorb the wave band (i.e. visible light wave range) of wavelength 400nm～700nm, and make optical image taking system be applicable to the wave band of wavelength about 810nm.
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 16 and Figure 17, wherein Figure 16 illustrates the image-taking device schematic diagram according to seventh embodiment of the invention, and Figure 17 is sequentially the spherical aberration of the 7th embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 16, image-taking device comprises optical image taking system (not another label) and sense electronics optical element 760.Optical image taking system is sequentially comprised the first lens 710, aperture the 700, second lens the 720, the 3rd lens 730, filter element 740 and imaging surface 750 by thing side to image side.Wherein, sense electronics optical element 760 is arranged on imaging surface 750.The lens having refracting power in optical image taking system are three (710-730).
First lens 710 have positive refracting power, and are plastic cement material, and its thing side surface 711 is convex surface at dipped beam axle, and its surface, image side 712 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
Second lens 720 have positive refracting power, and are plastic cement material, and its thing side surface 721 is concave surface at dipped beam axle, and its surface, image side 722 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
3rd lens 730 have negative refracting power, and are plastic cement material, and its thing side surface 731 is convex surface at dipped beam axle, and its surface, image side 732 is concave surface at dipped beam axle, and its two surface is all aspheric surface, and its surface, image side 732 has at least one convex surface in off-axis place.
The material of filter element 740 is glass, and it is arranged between the 3rd lens 730 and imaging surface 750, has no effect on the focal length of optical image taking system.
In the 7th embodiment, the second lens 720 are for absorbing made by visible ray material, and the first lens the 710, the 3rd lens 730 and filter element 740 are made by non-absorbing visible ray material.Whereby, the second lens 720 can absorb the wave band (i.e. visible light wave range) of wavelength 400nm～700nm, and make optical image taking system be applicable to the wave band of wavelength about 810nm.
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 18 and Figure 19, wherein Figure 18 illustrates the image-taking device schematic diagram according to eighth embodiment of the invention, and Figure 19 is sequentially the spherical aberration of the 8th embodiment, astigmatism and distortion curve figure from left to right.As shown in Figure 18, image-taking device comprises optical image taking system (not another label) and sense electronics optical element 860.Optical image taking system is sequentially comprised the first lens 810, aperture the 800, second lens the 820, the 3rd lens 830, filter element 840 and imaging surface 850 by thing side to image side.Wherein, sense electronics optical element 860 is arranged on imaging surface 850.The lens having refracting power in optical image taking system are three (810-830).
First lens 810 have positive refracting power, and are plastic cement material, and its thing side surface 811 is convex surface at dipped beam axle, and its surface, image side 812 is convex surface at dipped beam axle, 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 concave surface at dipped beam axle, and its surface, image side 822 is convex surface at dipped beam axle, and its two surface is all aspheric surface.
3rd lens 830 have negative refracting power, and are plastic cement material, and its thing side surface 831 is convex surface at dipped beam axle, and its surface, image side 832 is concave surface at dipped beam axle, and its two surface is all aspheric surface, and its surface, image side 832 has at least one convex surface in off-axis place.
The material of filter element 840 is plastic cement, and it is arranged between the 3rd lens 830 and imaging surface 850, has no effect on the focal length of optical image taking system.
In the 8th embodiment, filter element 840 is for absorbing made by visible ray material, and first lens the 810, second lens 820 and the 3rd lens 830 are made by non-absorbing visible ray material.Whereby, filter element 840 can absorb the wave band (i.e. visible light wave range) of wavelength 400nm～700nm, and makes optical image taking system be applicable to the wave band of wavelength about 810nm.
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 optical image taking system of three tool refracting power lens, the first lens that wherein optical image taking system comprises the positive refracting power of tool, the second lens having positive refracting power and the 3rd lens of the negative refracting power of tool, and the refracting power of the 3rd lens is strong compared with the first lens and the second lens.Whereby, overall length and the back focal length of optical image taking system can effectively be shortened.Additionally, when meeting specified conditions, contribute to making the refracting power configuration of lens in optical image taking system more to balance, to revise the aberration of optical image taking system, and reduce the sensitivity of optical image taking system.Furthermore, the first lens thing side surface and surface, image side are all convex surface, can the curvature distribution of active balance the first lens, help avoid the first single surface curvature of lens too strong, to reduce the generation of optical image taking system aberration, and reduce difficult forming degree.
Although the present invention is disclosed above with embodiment, so it is not limited to the present invention.Any it 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 is when being defined in the range of standard depending on appended claim.
Claims (25)
1. an optical image taking 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 at dipped beam axle, and its surface, image side is convex surface at dipped beam axle, and its thing side surface and surface, image side are all aspheric surface, and these first lens are plastic cement material；
One second lens, have positive refracting power, and its thing side surface is concave surface at dipped beam axle, and its surface, image side is convex surface at dipped beam axle, and its thing side surface and surface, image side are all aspheric surface, and these second lens are plastic cement material；And
One the 3rd lens, have negative refracting power, and its surface, image side is concave surface at dipped beam axle, and its off-axis place, surface, image side has at least one convex surface, and its thing side surface and surface, image side are all aspheric surface, and the 3rd lens are plastic cement material；
Wherein, the lens having refracting power in this optical image taking system are these first lens, these second lens and the 3rd lens, and this optical image taking system further includes an aperture, and this aperture is arranged between this surface, the first lens image side and this second lens thing side surface；
Wherein, the focal length of these the first lens is f1, the focal length of these the second lens is f2, the focal length of the 3rd lens is f3, this the first lens thickness on optical axis is CT1, and the 3rd lens thickness on optical axis is CT3, and this aperture to the 3rd surface, lens image side distance on optical axis is SD, to the 3rd surface, lens image side, the distance on optical axis is TD to this first lens thing side surface, and it meets following condition:
|f3|<f2<f1；
1.55<CT1/CT3；And
0.55<SD/TD<0.80。
Optical image taking system the most 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:
2.5<T12/T23。
Optical image taking system the most according to claim 2, it is characterised in that this first lens thickness on optical axis is CT1, and the 3rd lens thickness on optical axis is CT3, it meets following condition:
1.80<CT1/CT3<4.50。
Optical image taking system the most according to claim 2, it is characterised in that these first lens, these second lens and the 3rd lens summation of lens thickness on optical axis are Σ CT, and this first lens thickness on optical axis is CT1, it meets following condition:
1.40<ΣCT/CT1<2.60。
Optical image taking system the most 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, it meets following condition:
2.40<CT1/CT3<3.50。
Optical image taking system the most according to claim 1, it is characterised in that the 3rd lens thing side surface is concave surface at dipped beam axle.
Optical image taking system the most according to claim 1, it is characterised in that the abbe number of these the second lens is V2, the abbe number of the 3rd lens is V3, and it meets following condition:
0.80<V2/V3<1.33。
Optical image taking system the most according to claim 1, it is characterised in that this first lens thing side surface to the 3rd surface, lens image side distance on optical axis is TD, it meets following condition:
TD<2.25mm。
Optical image taking system the most according to claim 1, it is characterised in that the abbe number of these the second lens is V2, the abbe number of the 3rd lens is V3, and it meets following condition:
V2+V3<70。
Optical image taking system the most according to claim 1, it is characterised in that the refractive index of these the second lens is N2, the refractive index of the 3rd lens is N3, and it meets following condition:
3.00<N2+N3<3.40。
11. optical image taking systems according to claim 1, it is characterised in that this first lens thing side surface to imaging surface distance on optical axis is TL, and the entrance pupil aperture of this optical image taking system is EPD, it meets following condition:
1.0<TL/EPD<3.4。
12. optical image taking systems 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 the focal length of the 3rd lens is f3, and it meets following condition:
1.25<(|f3|/f2)+(f2/f1)<1.85。
13. optical image taking systems according to claim 12, it is characterised in that the focal length of these the first lens is f1, the radius of curvature on this surface, the first lens image side is R2, and it meets following condition:
-1.5<f1/R2<0。
14. optical image taking systems according to claim 1, it is characterised in that this optical image taking system is used in wavelength 750 nanometer in the wave band of 1050 nanometers.
15. optical image taking systems according to claim 1, it is characterised in that further include a filter element, wherein in these first lens, these second lens, the 3rd lens and this filter element at least one of which for absorbing made by visible ray material.
16. 1 kinds of image-taking devices, it is characterised in that comprise:
Optical image taking 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 optical image taking system.
17. 1 kinds of electronic installations, it is characterised in that comprise:
Image-taking device as claimed in claim 16.
18. 1 kinds of optical image taking systems, 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 at dipped beam axle, and its surface, image side is convex surface at dipped beam axle, and its thing side surface and surface, image side are all aspheric surface, and these first lens are plastic cement material；
One second lens, have positive refracting power, and its thing side surface is concave surface at dipped beam axle, and its surface, image side is convex surface at dipped beam axle, and its thing side surface and surface, image side are all aspheric surface, and these second lens are plastic cement material；And
One the 3rd lens, have negative refracting power, and its surface, image side is concave surface at dipped beam axle, and its off-axis place, surface, image side has at least one convex surface, and its thing side surface and surface, image side are all aspheric surface, and the 3rd lens are plastic cement material；
Wherein, the lens having refracting power in this optical image taking system are these first lens, these second lens and the 3rd lens, this optical image taking system further includes in a filter element, and these first lens, these second lens, the 3rd lens and this filter element at least one of which for absorbing made by visible ray material；
Wherein, the focal length of these the first lens is f1, and the focal length of these the second lens is f2, and the focal length of the 3rd lens is f3, and this first lens thickness on optical axis is CT1, and the 3rd lens thickness on optical axis is CT3, and it meets following condition:
|f3|<f2<f1；And
1.25<CT1/CT3。
19. optical image taking systems according to claim 18, it is characterised in that this first lens thickness on optical axis is CT1, and the 3rd lens thickness on optical axis is CT3, it meets following condition:
1.55<CT1/CT3。
20. optical image taking systems according to claim 18, it is characterised in that this first lens thing side surface to the 3rd surface, lens image side distance on optical axis is TD, it meets following condition:
TD<2.25mm。
21. optical image taking system according to claim 18, it is characterised in that the abbe number of these the second lens is V2, the abbe number of the 3rd lens is V3, and it meets following condition:
V2+V3<70。
22. optical image taking systems according to claim 18, it is characterised in that this first lens thing side surface to imaging surface distance on optical axis is TL, and the entrance pupil aperture of this optical image taking system is EPD, it meets following condition:
1.0<TL/EPD<3.4。
23. optical image taking systems according to claim 18, it is characterised in that these first lens, these second lens and the 3rd lens summation of lens thickness on optical axis are Σ CT, and this first lens thickness on optical axis is CT1, it meets following condition:
1.40<ΣCT/CT1<2.60。
24. 1 kinds of image-taking devices, it is characterised in that comprise:
Optical image taking system as claimed in claim 18；And
One sense electronics optical element, wherein this sense electronics optical element is arranged on an imaging surface of this optical image taking system.
25. 1 kinds of electronic installations, it is characterised in that comprise:
Image-taking device as claimed in claim 24.
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