CN102156342B - Image capturing lens group - Google Patents
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- CN102156342B CN102156342B CN201010115619A CN201010115619A CN102156342B CN 102156342 B CN102156342 B CN 102156342B CN 201010115619 A CN201010115619 A CN 201010115619A CN 201010115619 A CN201010115619 A CN 201010115619A CN 102156342 B CN102156342 B CN 102156342B
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Abstract
The invention provides an image capturing lens group, from an object side to an image side, which orderly comprises a first lens, a second lens, a third lens, a fourth lens and an aperture, wherein the first lens has positive refractive power, and an object side surface of the first lens is a convex surface; the second lens has negative refractive power; the third lens has the positive refractive power, and the object side surface of the third lens the concave surface while an image side surface thereof is the convex surface, and the object side surface and the image side surface of the third lens are both aspheric surfaces; the fourth lens has the negative refractive power, the image side surface of the fourth lens is the concave surface provided with at least one inflection point, and the object side surface and the image side surface of the fourth lens are both aspheric surfaces; and the aperture is located between a photographed object and the first lens. Only four of the lenses of the image capturing lens group have the refractive power. With the configuration mode of the lens group, volume of a camera lens can be reduced, sensitivity of an optical system is reduced, and higher resolving power can be obtained.
Description
Technical field
The invention relates to a kind of image capture lens group; Particularly about a kind of miniaturization image capture lens group of the mobile phone that is applied to take pictures.
Background technology
Recent years, along with the rise of mobile phone camera, the demand of miniaturization phtographic lens day by day improves; And the photo-sensitive cell of general phtographic lens is nothing more than being sensitization coupling element (Charge Coupled Device; CCD) or two kinds of complementary matal-oxide semiconductor elements (Complementary Metal-OxideSemiconductor Sensor, CMOS Sensor), and because the progressing greatly of semiconductor process techniques; Make the Pixel Dimensions of photo-sensitive cell dwindle; Add now that electronic product is a development trend with the good and compact external form of function, therefore, the miniaturization phtographic lens that possesses good image quality becomes main flow in the market.
It is main that the phtographic lens that tradition is equipped on mobile phone camera adopts the three-chip type lens arrangement more; Lens combination is born second lens of refracting power and the 3rd lens of the positive refracting power of a tool from thing side to first lens, the tool that as side are the positive refracting power of a tool in regular turn; Constitute so-called Triplet pattern; Like United States Patent (USP) the 7th, 145, shown in No. 736.When the elemental area of photo-sensitive cell dwindles gradually, and under system's situation that the requirement of image quality is improved constantly, common three-chip type lens combination can't satisfy the more phtographic lens module of high-order.
United States Patent (USP) the 7th, 365 has disclosed a kind of four-piece type lens combination No. 920; But wherein first lens and second lens are bonded to each other and become Doublet with two sheet glass spherical mirrors; In order to color difference eliminating, but the method has its shortcoming, one of which; Too much glass spherical mirror configuration makes degree of freedom in system not enough, causes the optics total length of system to be difficult for shortening; Its two, the bonding technology of glass mirror is difficult for, and causes the difficulty in the manufacturing.
In view of this, be badly in need of a kind of high-pixel mobile phone camera that can be used for, technology is simple and easy and be unlikely to the image capture lens group that makes the camera lens total length long.
Summary of the invention
The present invention provides a kind of image capture lens group, is extremely comprised in regular turn as side by the thing side: first lens of the positive refracting power of a tool, and its thing side surface is a convex surface; Second lens of the negative refracting power of one tool; The 3rd lens of the positive refracting power of one tool, its thing side surface are concave surface, be convex surface as side surface, and the thing side surface of the 3rd lens and be all aspheric surface as side surface; The 4th lens of the negative refracting power of one tool, it is a concave surface as side surface, the 4th lens be provided with at least one point of inflexion as side surface, and the thing side surface of the 4th lens and be all aspheric surface as side surface; And an aperture, be arranged between object and this first lens; Wherein, the number of lenses of tool refracting power is merely four in this image capture lens group, and the focal length of overall image capture lens group is f; The focal length of the 3rd lens is f3, and the focal length of the 4th lens is f4, and the refractive index of these first lens is N1; The refractive index of these second lens is N2, and the thickness of these second lens on optical axis is CT2, and the thickness of the 3rd lens on optical axis is CT3; The abbe number of these first lens is V1; The abbe number of these second lens is V2, and the thing side surface radius-of-curvature of these first lens is R1, and the optics total length of this image capture lens group is TTL; The distance of this aperture to imaging surface on optical axis is SL, satisfies following relationship formula: 0.00＜f/f3＜0.95;-1.00＜f/f4＜-0.01; | N1-N2|＜0.12; 3.0＜(CT3/f) * 100＜20.0; 30.5＜V1-V2＜42.0; 0.20＜R1/f＜0.60; 0.20mm＜(CT2/f) * TTL＜0.73mm; 0.93＜SL/TTL＜1.07.
On the other hand, the present invention provides a kind of image capture lens group, by the thing side to comprising in regular turn as side: first lens of the positive refracting power of a tool, its thing side surface are convex surface, be concave surface as side surface; Second lens of the negative refracting power of one tool, it is a concave surface as side surface; The 3rd lens of the positive refracting power of one tool, its thing side surface are concave surface, be convex surface as side surface, and the thing side surface of the 3rd lens and be all aspheric surface as side surface; The 4th lens of the negative refracting power of one tool, it is a concave surface as side surface, the 4th lens be provided with at least one point of inflexion as side surface, and the thing side surface of the 4th lens and be all aspheric surface as side surface; And an aperture, be arranged between object and this second lens; Wherein, The number of lenses of tool refracting power is merely four in this image capture lens group, and the focal length of overall image capture lens group is f, and the focal length of the 3rd lens is f3; The focal length of the 4th lens is f4; The refractive index of these first lens is N1, and the refractive index of these second lens is N2, satisfies following relationship formula: 0.00＜f/f3＜0.95;-1.00＜f/f4＜-0.01; | N1-N2|＜0.12.
The present invention can effectively dwindle the susceptibility of camera lens volume, reduction optical system through the configuration mode of above-mentioned mirror group, more can obtain higher resolving power.
In the image capture lens group of the present invention, the positive refracting power of this first lens tool can effectively shorten the total length of lens combination; This second lens tool is born refracting power, can help the aberration of update the system; The positive refracting power of the 3rd lens tool can effectively distribute the refracting power of these first lens, to reduce the susceptibility of system; The 4th lens tool is born refracting power, can form one just with the 3rd lens, negative looking in the distance (Telephoto) structure, helps shortening the back focal length of system, to reduce its optics total length.
In the image capture lens group of the present invention, these first lens can be a biconvex lens or a thing side surface is convex surface, is the crescent lens of concave surface as side surface; When these first lens are a biconvex lens, can effectively strengthen the refracting power configuration of these first lens, and then make the optics total length of this image capture lens group become shorter; When these first lens are the crescent lens of a convex-concave, then comparatively favourable for the astigmatism (Astigmatism) of update the system.These second lens can be concave surface as side surface, help increasing the back focal length of system, have enough back focal length can place other members to guarantee the image capture lens group; When the thing side surface of these second lens, when being all concave surface, then more help Petzval and the number (Petzval Sum) and the back focal length that increases system of update the system as side surface.The thing side surface of the 3rd lens is concave surface, be convex surface as side surface, can help the astigmatism of update the system.It is convex surface that the 4th lens can be a thing side surface, be the crescent lens or a biconcave lens of concave surface as side surface; When the 4th lens are the crescent lens of a convex-concave, help the astigmatism and the higher order aberratons of update the system; When the 4th lens were a biconcave lens, the principal point (Principal Point) that then can make optical system was further from imaging surface, and helped shortening the optics total length of system, to keep the miniaturization of camera lens.
This aperture can place between object and this first lens or between object and this second lens in the image capture lens group of the present invention.Through these first lens positive refracting power is provided, and when aperture placed the object side near this image capture lens group, can effectively shortens the optics total length of this image capture lens group.In addition; Above-mentioned configuration can make the outgoing pupil (Exit Pupil) of this image capture lens group away from imaging surface, and therefore, light will be incident on the mode near vertical incidence on the photo-sensitive cell; This is the heart far away (Telecentric) characteristic of picture side; Heart characteristic far away is very important for the photoperceptivity of now solid-state electronic photo-sensitive cell, can make the sensitization susceptibility of sense electronics optical element improve, and the minimizing system produces the possibility at dark angle.In addition, the 4th lens are provided with the point of inflexion in the image capture lens group of the present invention, and the light that can more effectively suppress from the axle visual field is incident in the angle on the photo-sensitive cell, and the further aberration of modified off-axis visual field.In addition; In wide-angle optics; Need do correction to distorting (Distortion) and multiplying power look receipts poor (Chromatic Aberration of Magnification) especially; Its method is for to place system light flexion equilibrium of forces place with aperture, and so configuration mode helps reducing the susceptibility of system.In other words, in the image capture lens group of the present invention, when aperture being placed more near the object place, focus on heart characteristic far away, the optics total length of overall image capture lens group can be shorter; When aperture being placed more near this second lens place, then focus on the characteristic of Wide-angle, can effectively reduce the susceptibility of system.
Description of drawings
Figure 1A is the optical system synoptic diagram of first embodiment of the invention;
Figure 1B is the aberration curve figure of first embodiment of the invention;
Fig. 2 A is the optical system synoptic diagram of second embodiment of the invention;
Fig. 2 B is the aberration curve figure of second embodiment of the invention;
Fig. 3 A is the optical system synoptic diagram of third embodiment of the invention;
Fig. 3 B is the aberration curve figure of third embodiment of the invention;
Fig. 4 A is the optical system synoptic diagram of fourth embodiment of the invention;
Fig. 4 B is the aberration curve figure of fourth embodiment of the invention;
Fig. 5 A is the optical system synoptic diagram of fifth embodiment of the invention;
Fig. 5 B is the aberration curve figure of fifth embodiment of the invention;
Fig. 6 A is the optical system synoptic diagram of sixth embodiment of the invention;
Fig. 6 B is the aberration curve figure of sixth embodiment of the invention;
Fig. 7 is a table one, is the optical data of first embodiment of the invention;
Fig. 8 is a table two, is the aspherical surface data of first embodiment of the invention;
Fig. 9 is a table three, is the optical data of second embodiment of the invention;
Figure 10 is a table four, is the aspherical surface data of second embodiment of the invention;
Figure 11 is a table five, is the optical data of third embodiment of the invention;
Figure 12 is a table six, is the aspherical surface data of third embodiment of the invention;
Figure 13 is a table seven, is the optical data of fourth embodiment of the invention;
Figure 14 is a table eight, is the aspherical surface data of fourth embodiment of the invention;
Figure 15 is a table nine, is the optical data of fifth embodiment of the invention;
Figure 16 is a table ten, is the aspherical surface data of fifth embodiment of the invention;
Figure 17 is a table ten one, is the optical data of sixth embodiment of the invention;
Figure 18 A and Figure 18 B are table ten two A and table ten two B, are the aspherical surface data of sixth embodiment of the invention;
Figure 19 is a table ten three, is the numerical data of first embodiment of the invention to the six embodiment correlationship formulas.
Drawing reference numeral:
First lens 100,200,300,400,500,600
Thing side surface 101,201,301,401,501,601
Picture side surface 102,202,302,402,502,602
Second lens 110,210,310,410,510,610
Thing side surface 111,211,311,411,511,611
Picture side surface 112,212,312,412,512,612
The 3rd lens 120,220,320,420,520,620
Thing side surface 121,221,321,421,521,621
Picture side surface 122,222,322,422,522,622
The 4th lens 130,230,330,430,530,630
Thing side surface 131,231,331,431,531,631
Picture side surface 132,232,332,432,532,632
Aperture 140,240,340,440,540,640
Infrared ray filtering optical filter 150,250,350,450,550,650
Imaging surface 160,260,370,460,560,660
The focal length of overall image capture lens group is f
The focal length of first lens is f1
The focal length of the 3rd lens is f3
The focal length of the 4th lens is f4
The refractive index of first lens is N1
The refractive index of second lens is N2
The abbe number of first lens is V1
The abbe number of second lens is V2
The thing side surface radius-of-curvature of first lens is R1
The thing side surface radius-of-curvature of second lens is R3
Second lens be R4 as the side surface radius-of-curvature
First lens and the distance of second lens on optical axis are T12
The thickness of second lens on optical axis is CT2
The thickness of the 3rd lens on optical axis is CT3
The distance of aperture to imaging surface on optical axis is SL
Thing side surface to the four lens of first lens be Td as the distance of side surface on optical axis
The optics total length of image capture lens group is TTL
The half the of sense electronics optical element effective pixel area diagonal angle line length is ImgH
Embodiment
The present invention provides a kind of image capture lens group, is extremely comprised in regular turn as side by the thing side: first lens of the positive refracting power of a tool, and its thing side surface is a convex surface; Second lens of the negative refracting power of one tool; The 3rd lens of the positive refracting power of one tool, its thing side surface are concave surface, be convex surface as side surface, and the thing side surface of the 3rd lens and be all aspheric surface as side surface; The 4th lens of the negative refracting power of one tool, it is a concave surface as side surface, the 4th lens be provided with at least one point of inflexion as side surface, and the thing side surface of the 4th lens and be all aspheric surface as side surface; And an aperture, be arranged between object and this first lens; Wherein, the number of lenses of tool refracting power is merely four in this image capture lens group, and the focal length of overall image capture lens group is f; The focal length of the 3rd lens is f3, and the focal length of the 4th lens is f4, and the refractive index of these first lens is N1; The refractive index of these second lens is N2, and the thickness of these second lens on optical axis is CT2, and the thickness of the 3rd lens on optical axis is CT3; The abbe number of these first lens is V1; The abbe number of these second lens is V2, and the thing side surface radius-of-curvature of these first lens is R1, and the optics total length of this image capture lens group is TTL; The distance of this aperture to imaging surface on optical axis is SL, satisfies following relationship formula: 0.00＜f/f3＜0.95;-1.00＜f/f4＜-0.01; | N1-N2|＜0.12; 3.0＜(CT3/f) * 100＜20.0; 30.5＜V1-V2＜42.0; 0.20＜R1/f＜0.60; 0.20mm＜(CT2/f) * TTL＜0.73mm; 0.93＜SL/TTL＜1.07.
When aforementioned image capture lens group satisfies following relationship formula: 0.00＜f/f3＜0.95; Can effectively distribute the refracting power of these first lens and guarantee that simultaneously the refracting power of the 3rd lens can be not excessive, help reducing the susceptibility of system and be unlikely to produce too much aberration; Further, preferably, satisfy following relationship formula: 0.20＜f/f3＜0.80.When aforementioned image capture lens group satisfies following relationship formula :-1.00＜f/f4＜-0.01, the 4th lens are kept suitable refracting power, can effectively guarantee the structure of looking in the distance that forms with the 3rd lens, and help the higher order aberratons of update the system; Further, preferably, satisfy following relationship formula :-0.60＜f/f4＜-0.10.When aforementioned image capture lens group satisfies the following relationship formula: | N1-N2|＜0.12 can help the ability of elevator system correction astigmatism.When aforementioned image capture lens group satisfies the following relationship formula: the thickness of 3.0＜(CT3/f) * the 100＜20.0, the 3rd lens is comparatively suitable, can help the mouldability and the homogenieity of plastic lens ejection formation.When aforementioned image capture lens group satisfies following relationship formula: 30.5＜V1-V2＜42.0, help the correction of system's aberration.When aforementioned image capture lens group satisfies following relationship formula: 0.20＜R1/f＜0.60, can effectively reduce the optics total length of image capture lens group, and can avoid the excessive increase of higher order aberratons; Further, preferably, satisfy following relationship formula: 0.20＜R1/f＜0.40.When aforementioned image capture lens group satisfies the * TTL＜0.73mm of following relationship formula: 0.20mm＜(CT2/f); The thickness of these second lens is comparatively suitable; The mouldability and the homogenieity that can help the plastic lens ejection formation, and can make the configuration of mirror group comparatively tight simultaneously, to keep the miniaturization of camera lens; Further, preferably, satisfy the * TTL＜0.45mm of following relationship formula: 0.25mm＜(CT2/f).When aforementioned image capture lens group satisfies following relationship formula: 0.93＜SL/TTL＜1.07, can guarantee the heart characteristic far away of lens combination of the present invention, with the optics total length of effective shortening system.
In the aforementioned image capture lens group of the present invention, preferably, these second lens be concave surface as side surface, help increasing the back focal length of system, have enough back focal length can place other member to guarantee this image capture lens group; Further, preferably, the thing side surface of these second lens and be all concave surface as side surface; Preferably, the thing side surface of the 4th lens is a convex surface, with effective correction astigmatism.
In the aforementioned image capture lens group of the present invention; Other is provided with a sense electronics optical element and supplies the object imaging; The optics total length of this image capture lens group is TTL, and TTL is defined as the distance of thing side surface to this sense electronics optical element on optical axis of these first lens, the thing side surface of these first lens to the 4th lens be Td as the distance of side surface on optical axis; Preferably, satisfy the following relationship formula: (Td/ImgH) * f＜5.2mm.When (Td/ImgH) * f satisfies the above-mentioned relation formula, can make the mirror configuration set comparatively tight, to keep the miniaturization of camera lens.
In the aforementioned image capture lens group of the present invention, the focal length of overall image capture lens group is f, and the focal length of these first lens is f1, preferably, satisfies following relationship formula: 1.25＜f/f1＜2.00.When f/f1 satisfies the above-mentioned relation formula; The refracting power size configure of these first lens is balance comparatively; The effective optics total length of control system; Keep the characteristic of miniaturization, and can avoid the excessive increase of high-order spherical aberration (High OrderSpherical Aberration) simultaneously, and then promote image quality; Further, preferably, satisfy following relationship formula: 1.50＜f/f1＜1.80.
In the aforementioned image capture lens group of the present invention, these first lens and the distance of these second lens on optical axis are T12, and the focal length of overall image capture lens group is f, preferably, satisfies the following relationship formula: 0.5＜(T12/f) * 100＜6.0.When (T12/f) * 100 satisfies the above-mentioned relation formula, help revising the higher order aberratons of this image capture lens group, with the elevator system image quality.
In the aforementioned image capture lens group of the present invention, the thing side surface radius-of-curvature of these second lens is R3, these second lens be R4 as the side surface radius-of-curvature, preferably, satisfy following relationship formula: R3/R4＜-1.2.When R3/R4 satisfies the above-mentioned relation formula, can effectively increase the back focal length of system, and be unlikely to make the total length of system long, and help the revisal of system aberration.
In the aforementioned image capture lens group of the present invention; Other is provided with a sense electronics optical element and supplies the object imaging; The optics total length of this image capture lens group is TTL; And the half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, preferably, satisfies following relationship formula: TTL/ImgH＜2.0.When TTL/ImgH satisfies the above-mentioned relation formula, help keeping the miniaturization of this image capture lens group, to be equipped on the frivolous portable electronic product.
On the other hand, the present invention provides a kind of image capture lens group, by the thing side to comprising in regular turn as side: first lens of the positive refracting power of a tool, its thing side surface are convex surface, be concave surface as side surface; Second lens of the negative refracting power of one tool, it is a concave surface as side surface; The 3rd lens of the positive refracting power of one tool, its thing side surface are concave surface, be convex surface as side surface, and the thing side surface of the 3rd lens and be all aspheric surface as side surface; The 4th lens of the negative refracting power of one tool, it is a concave surface as side surface, the 4th lens be provided with at least one point of inflexion as side surface, and the thing side surface of the 4th lens and be all aspheric surface as side surface; And an aperture, be arranged between object and this second lens; Wherein, The number of lenses of tool refracting power is merely four in this image capture lens group, and the focal length of overall image capture lens group is f, and the focal length of the 3rd lens is f3; The focal length of the 4th lens is f4; The refractive index of these first lens is N1, and the refractive index of these second lens is N2, satisfies following relationship formula: 0.00＜f/f3＜0.95;-1.00＜f/f4＜-0.01; | N1-N2|＜0.12.
When aforementioned image capture lens group satisfies following relationship formula: 0.00＜f/f3＜0.95; Can effectively distribute the refracting power of these first lens and guarantee that simultaneously the refracting power of the 3rd lens can be not excessive, help reducing the susceptibility of system and be unlikely to produce too much aberration; Further, preferably, satisfy following relationship formula: 0.20＜f/f3＜0.80.When aforementioned image capture lens group satisfies following relationship formula :-1.00＜f/f4＜-0.01, the 4th lens are kept suitable refracting power, can effectively guarantee the structure of looking in the distance that forms with the 3rd lens, and help the higher order aberratons of update the system; Further, preferably, satisfy following relationship formula :-0.60＜f/f4＜-0.10.When aforementioned image capture lens group satisfies the following relationship formula: | N1-N2|＜0.12 can help the ability of elevator system correction astigmatism.
In the aforementioned image capture lens group of the present invention, preferably, the thing side surface of these second lens is a concave surface, helps increasing the back focal length of system, has enough back focal length can place other member to guarantee this image capture lens group.
In the aforementioned image capture lens group of the present invention, the focal length of overall image capture lens group is f, and the focal length of these first lens is f1, preferably, satisfies following relationship formula: 1.25＜f/f1＜2.00.When f/f1 satisfied the above-mentioned relation formula, the refracting power size configure of these first lens is balance comparatively, and effectively the optics total length of control system is kept the characteristic of miniaturization, and can avoid the excessive increase of high-order spherical aberration simultaneously, and then promoted image quality.
In the aforementioned image capture lens group of the present invention, the abbe number of these first lens is V1, and the abbe number of these second lens is V2, preferably, satisfies following relationship formula: 30.5＜V1-V2＜42.0.When V1-V2 satisfies the above-mentioned relation formula, help the correction of system's aberration.
In the aforementioned image capture lens group of the present invention, the thickness of the 3rd lens on optical axis is CT3, and the focal length of overall image capture lens group is f, preferably, satisfies the following relationship formula: 3.0＜(CT3/f) * 100＜20.0.When (CT3/f) * 100 satisfied the above-mentioned relation formula, the thickness of the 3rd lens was comparatively suitable, can help the mouldability and the homogenieity of plastic lens ejection formation.
In the aforementioned image capture lens group of the present invention, these first lens and the distance of these second lens on optical axis are T12, and the focal length of overall image capture lens group is f, preferably, satisfies the following relationship formula: 0.5＜(T12/f) * 100＜6.0.When (T12/f) * 100 satisfies the above-mentioned relation formula, help revising the higher order aberratons of this image capture lens group, with the elevator system image quality.
In the aforementioned image capture lens group of the present invention, the thing side surface radius-of-curvature of these first lens is R1, and the focal length of overall image capture lens group is f, preferably, satisfies following relationship formula: 0.20＜R1/f＜0.40.When R1/f satisfies the above-mentioned relation formula, can effectively reduce the optics total length of this image capture lens group, and can avoid the excessive increase of higher order aberratons.
In the aforementioned image capture lens group of the present invention; Other is provided with a sense electronics optical element and supplies the object imaging; The distance of this aperture to imaging surface on optical axis is SL, and the optics total length of this image capture lens group is TTL, and the half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH; Preferably, satisfy following relationship formula: 0.93＜SL/TTL＜1.07 and TTL/ImgH＜2.0.When SL/TTL satisfies the above-mentioned relation formula, can guarantee the heart characteristic far away of lens combination, with the optics total length of effective shortening system; When TTL/ImgH satisfies the above-mentioned relation formula, help keeping the miniaturization of this image capture lens group, to be equipped on the frivolous portable electronic product.
In the image capture lens group of the present invention, the material of lens can be glass or plastic cement, if the material of lens is a glass, then can increase the degree of freedom of system's refracting power configuration, if the lens material is a plastic cement, then can effectively reduce production costs.In addition, aspheric surface can be set on minute surface, aspheric surface can be made into the shape beyond the sphere easily; Obtain more controlled variable; In order to subduing aberration, and then the number that uses of reduction lens, therefore can effectively reduce the optics total length of image capture lens group of the present invention.
In the image capture lens group of the present invention,, represent that then this lens surface is a convex surface in paraxial place if lens surface is a convex surface; If lens surface is a concave surface, represent that then this lens surface is a concave surface in paraxial place.
Image capture lens group of the present invention will cooperate appended graphic the detailed description through following specific embodiment.
" first embodiment "
First embodiment of the invention sees also Figure 1A, and the aberration curve of first embodiment sees also Figure 1B.The image capture lens group of first embodiment mainly is made up of four pieces of lens, is extremely comprised in regular turn as side by the thing side:
The 3rd lens 120 of the positive refracting power of one tool, its thing side surface 121 are that concave surface and picture side surface 122 are convex surface, and its material is a plastic cement, the thing side surface 121 of the 3rd lens 120, are all aspheric surface as side surface 122;
The 4th lens 130 of the negative refracting power of one tool; Its thing side surface 131 is that convex surface and picture side surface 132 are concave surface; Its material is a plastic cement; The thing side surface 131 of the 4th lens 130, be all aspheric surface as side surface 132, and the 4th lens 130 be provided with at least one point of inflexion as side surface 132; And
One aperture 140 places between object and this first lens 100;
Other includes an infrared ray filtering optical filter (IR Filter) 150 and places looking like between a side surface 132 and the imaging surface 160 of the 4th lens 130; The material of this infrared ray filtering optical filter 150 is that glass and its do not influence the focal length of this image capture lens group of the present invention.
The equation of above-mentioned aspheric curve is represented as follows:
Wherein:
X: be the point of Y apart from optical axis on the aspheric surface, itself and the relative height that is tangential on the tangent plane on summit on the aspheric surface optical axis;
Y: the point on the aspheric curve and the distance of optical axis;
K: conical surface coefficient;
Ai: i rank asphericity coefficient.
In the first embodiment image capture lens group, the focal length of overall image capture lens group is f, and its relational expression is: f=3.53 (millimeter).
In the first embodiment image capture lens group, the f-number (f-number) of overall image capture lens group is Fno, and its relational expression is: Fno=2.85.
In the first embodiment image capture lens group, the half the of maximum visual angle is HFOV in the overall image capture lens group, and its relational expression is: HFOV=32.5 (degree).
In the first embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of these first lens 100 is f1, and its relational expression is: f/f1=1.67.
In the first embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of the 3rd lens 120 is f3, and its relational expression is: f/f3=0.33.
In the first embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of the 4th lens 130 is f4, and its relational expression is: f/f4=-0.12.
In the first embodiment image capture lens group, the refractive index of these first lens 100 is N1, and the refractive index of these second lens 110 is N2, and its relational expression is: | N1-N2|=0.088.
In the first embodiment image capture lens group, the thickness of the 3rd lens 120 on optical axis is CT3, and the focal length of overall image capture lens group is f, and its relational expression is: (CT3/f) * 100=16.2.
In the first embodiment image capture lens group, the abbe number of these first lens 100 is V1, and the abbe number of these second lens 110 is V2, and its relational expression is: V1-V2=32.5.
In the first embodiment image capture lens group, the thing side surface radius-of-curvature of these first lens 100 is R1, and the focal length of overall image capture lens group is f, and its relational expression is: R1/f=0.33.
In the first embodiment image capture lens group, the thickness of these second lens 110 on optical axis is CT2, and the focal length of overall image capture lens group is f, and the optics total length of this image capture lens group is TTL, and its relational expression is: (CT2/f) * TTL=0.34mm.
In the first embodiment image capture lens group, the distance of this aperture 140 to this imaging surface 160 on optical axis is SL, and the optics total length of this image capture lens group is TTL, and its relational expression is: SL/TTL=0.96.
In the first embodiment image capture lens group; This image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 160 places; Thing side surface 101 to the 4th lens 130 of these first lens 100 be Td as the distance of side surface 132 on optical axis; The half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and the focal length of overall image capture lens group is f, and its relational expression is: (Td/ImgH) * f=3.93mm.
In the first embodiment image capture lens group, these first lens 100 are T12 with the distance of these second lens 110 on optical axis, and the focal length of overall image capture lens group is f, and its relational expression is: (T12/f) * 100=2.2.
In the first embodiment image capture lens group, the thing side surface radius-of-curvature of these second lens 110 is R3, these second lens 110 be R4 as the side surface radius-of-curvature, its relational expression is: R3/R4=-45.96.
In the first embodiment image capture lens group; This image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 160 places; The optics total length of this image capture lens group is TTL; And the half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.78.
The detailed optical data of first embodiment is shown in Fig. 7 table one, and its aspherical surface data is shown in Fig. 8 table two, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
" second embodiment "
Second embodiment of the invention sees also Fig. 2 A, and the aberration curve of second embodiment sees also Fig. 2 B.The image capture lens group of second embodiment mainly is made up of four pieces of lens, is extremely comprised in regular turn as side by the thing side:
First lens 200 of the positive refracting power of one tool, its thing side surface 201 and be all convex surface as side surface 202, its material is a plastic cement, the thing side surface 201 of these first lens 200, is all aspheric surface as side surface 202;
Second lens 210 of the negative refracting power of one tool, its thing side surface 211 and be all concave surface as side surface 212, its material is a plastic cement, the thing side surface 211 of these second lens 210, is all aspheric surface as side surface 212;
The 3rd lens 220 of the positive refracting power of one tool, its thing side surface 221 are that concave surface and picture side surface 222 are convex surface, and its material is a plastic cement, the thing side surface 221 of the 3rd lens 220, are all aspheric surface as side surface 222;
The 4th lens 230 of the negative refracting power of one tool; Its thing side surface 231 is that convex surface and picture side surface 232 are concave surface; Its material is a plastic cement; The thing side surface 231 of the 4th lens 230, be all aspheric surface as side surface 232, and the 4th lens 230 be provided with at least one point of inflexion as side surface 232; And
One aperture 240 places between object and this first lens 200;
Other includes an infrared ray filtering optical filter 250 and places looking like between a side surface 232 and the imaging surface 260 of the 4th lens 230; The material of this infrared ray filtering optical filter 250 is that glass and its do not influence the focal length of this image capture lens group of the present invention.
The equational expression of the second embodiment aspheric curve is as the pattern of first embodiment.
In the second embodiment image capture lens group, the focal length of overall image capture lens group is f, and its relational expression is: f=2.91 (millimeter).
In the second embodiment image capture lens group, the f-number of overall image capture lens group is Fno, and its relational expression is: Fno=2.40.
In the second embodiment image capture lens group, the half the of maximum visual angle is HFOV in the overall image capture lens group, and its relational expression is: HFOV=31.6 (degree).
In the second embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of these first lens 200 is f1, and its relational expression is: f/f1=1.66.
In the second embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of the 3rd lens 220 is f3, and its relational expression is: f/f3=0.92.
In the second embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of the 4th lens 230 is f4, and its relational expression is: f/f4=-0.92.
In the second embodiment image capture lens group, the refractive index of these first lens 200 is N1, and the refractive index of these second lens 210 is N2, and its relational expression is: | N1-N2|=0.088.
In the second embodiment image capture lens group, the thickness of the 3rd lens 220 on optical axis is CT3, and the focal length of overall image capture lens group is f, and its relational expression is: (CT3/f) * 100=15.8.
In the second embodiment image capture lens group, the abbe number of these first lens 200 is V1, and the abbe number of these second lens 210 is V2, and its relational expression is: V1-V2=32.5.
In the second embodiment image capture lens group, the thing side surface radius-of-curvature of these first lens 200 is R1, and the focal length of overall image capture lens group is f, and its relational expression is: R1/f=0.40.
In the second embodiment image capture lens group, the thickness of these second lens 210 on optical axis is CT2, and the focal length of overall image capture lens group is f, and the optics total length of this image capture lens group is TTL, and its relational expression is: (CT2/f) * TTL=0.35mm.
In the second embodiment image capture lens group, the distance of this aperture 240 to this imaging surface 260 on optical axis is SL, and the optics total length of this image capture lens group is TTL, and its relational expression is: SL/TTL=0.95.
In the second embodiment image capture lens group; This image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 260 places; Thing side surface 201 to the 4th lens 230 of these first lens 200 be Td as the distance of side surface 232 on optical axis; The half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and the focal length of overall image capture lens group is f, and its relational expression is: (Td/ImgH) * f=3.80mm.
In the second embodiment image capture lens group, these first lens 200 are T12 with the distance of these second lens 210 on optical axis, and the focal length of overall image capture lens group is f, and its relational expression is: (T12/f) * 100=1.7.
In the second embodiment image capture lens group, the thing side surface radius-of-curvature of these second lens 210 is R3, these second lens 210 be R4 as the side surface radius-of-curvature, its relational expression is: R3/R4=-2.91.
In the second embodiment image capture lens group; This image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 260 places; The optics total length of this image capture lens group is TTL; And the half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.87.
The detailed optical data of second embodiment is shown in Fig. 9 table three, and its aspherical surface data is shown in Figure 10 table four, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
" the 3rd embodiment "
Third embodiment of the invention sees also Fig. 3 A, and the aberration curve of the 3rd embodiment sees also Fig. 3 B.The image capture lens group of the 3rd embodiment mainly is made up of four pieces of lens, is extremely comprised in regular turn as side by the thing side:
The 3rd lens 320 of the positive refracting power of one tool, its thing side surface 321 are that concave surface and picture side surface 322 are convex surface, and its material is a plastic cement, the thing side surface 321 of the 3rd lens 320, are all aspheric surface as side surface 322;
The 4th lens 330 of the negative refracting power of one tool; Its thing side surface 331 is that convex surface and picture side surface 332 are concave surface; Its material is a plastic cement; The thing side surface 331 of the 4th lens 330, be all aspheric surface as side surface 332, and the 4th lens 330 be provided with at least one point of inflexion as side surface 332; And
One aperture 340 places between object and this first lens 300;
Other includes an infrared ray filtering optical filter 350 and places placing between this infrared ray filtering optical filter 350 and this imaging surface 370 as reaching a cover glass (Cover-glass) 360 between a side surface 332 and the imaging surface 370 of the 4th lens 330; The material of this infrared ray filtering optical filter 350 and this cover glass 360 is that glass and its do not influence the focal length of this image capture lens group of the present invention.
The equational expression of the 3rd embodiment aspheric curve is as the pattern of first embodiment.
In the 3rd embodiment image capture lens group, the focal length of overall image capture lens group is f, and its relational expression is: f=6.14 (millimeter).
In the 3rd embodiment image capture lens group, the f-number of overall image capture lens group is Fno, and its relational expression is: Fno=2.83.
In the 3rd embodiment image capture lens group, the half the of maximum visual angle is HFOV in the overall image capture lens group, and its relational expression is: HFOV=30.7 (degree).
In the 3rd embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of these first lens 300 is f1, and its relational expression is: f/f1=1.16.
In the 3rd embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of the 3rd lens 320 is f3, and its relational expression is: f/f3=0.72.
In the 3rd embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of the 4th lens 330 is f4, and its relational expression is: f/f4=-0.25.
In the 3rd embodiment image capture lens group, the refractive index of these first lens 300 is N1, and the refractive index of these second lens 310 is N2, and its relational expression is: | N1-N2|=0.089.
In the 3rd embodiment image capture lens group, the thickness of the 3rd lens 320 on optical axis is CT3, and the focal length of overall image capture lens group is f, and its relational expression is: (CT3/f) * 100=13.3.
In the 3rd embodiment image capture lens group, the abbe number of these first lens 300 is V1, and the abbe number of these second lens 310 is V2, and its relational expression is: V1-V2=33.1.
In the 3rd embodiment image capture lens group, the thing side surface radius-of-curvature of these first lens 300 is R1, and the focal length of overall image capture lens group is f, and its relational expression is: R1/f=0.41.
In the 3rd embodiment image capture lens group, the thickness of these second lens 310 on optical axis is CT2, and the focal length of overall image capture lens group is f, and the optics total length of this image capture lens group is TTL, and its relational expression is: (CT2/f) * TTL=0.96mm.
In the 3rd embodiment image capture lens group, the distance of this aperture 340 to this imaging surface 370 on optical axis is SL, and the optics total length of this image capture lens group is TTL, and its relational expression is: SL/TTL=0.98.
In the 3rd embodiment image capture lens group; This image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 370 places; Thing side surface 301 to the 4th lens 330 of these first lens 300 be Td as the distance of side surface 332 on optical axis; The half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and the focal length of overall image capture lens group is f, and its relational expression is: (Td/ImgH) * f=7.67mm.
In the 3rd embodiment image capture lens group, these first lens 300 are T12 with the distance of these second lens 310 on optical axis, and the focal length of overall image capture lens group is f, and its relational expression is: (T12/f) * 100=6.7.
In the 3rd embodiment image capture lens group, the thing side surface radius-of-curvature of these second lens 310 is R3, these second lens 310 be R4 as the side surface radius-of-curvature, its relational expression is: R3/R4=5.66.
In the 3rd embodiment image capture lens group; This image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 370 places; The optics total length of this image capture lens group is TTL; And the half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=2.08.
The detailed optical data of the 3rd embodiment is shown in Figure 11 table five, and its aspherical surface data is shown in Figure 12 table six, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
" the 4th embodiment "
Fourth embodiment of the invention sees also Fig. 4 A, and the aberration curve of the 4th embodiment sees also Fig. 4 B.The image capture lens group of the 4th embodiment mainly is made up of four pieces of lens, is extremely comprised in regular turn as side by the thing side:
First lens 400 of the positive refracting power of one tool, its thing side surface 401 are that convex surface and picture side surface 402 are concave surface, and its material is a plastic cement, the thing side surface 401 of these first lens 400, are all aspheric surface as side surface 402;
Second lens 410 of the negative refracting power of one tool, its thing side surface 411 and be all concave surface as side surface 412, its material is a plastic cement, the thing side surface 411 of these second lens 410, is all aspheric surface as side surface 412;
The 3rd lens 420 of the positive refracting power of one tool, its thing side surface 421 are that concave surface and picture side surface 422 are convex surface, and its material is a plastic cement, the thing side surface 421 of the 3rd lens 420, are all aspheric surface as side surface 422;
The 4th lens 430 of the negative refracting power of one tool; Its thing side surface 431 is that convex surface and picture side surface 432 are concave surface; Its material is a plastic cement; The thing side surface 431 of the 4th lens 430, be all aspheric surface as side surface 432, and the 4th lens 430 be provided with at least one point of inflexion as side surface 432; And
One aperture 440 places between object and this first lens 400;
Other includes an infrared ray filtering optical filter 450 and places looking like between a side surface 432 and the imaging surface 460 of the 4th lens 430; The material of this infrared ray filtering optical filter 450 is that glass and its do not influence the focal length of this image capture lens group of the present invention.
The equational expression of the 4th embodiment aspheric curve is as the pattern of first embodiment.
In the 4th embodiment image capture lens group, the focal length of overall image capture lens group is f, and its relational expression is: f=6.47 (millimeter).
In the 4th embodiment image capture lens group, the f-number of overall image capture lens group is Fno, and its relational expression is: Fno=2.85.
In the 4th embodiment image capture lens group, the half the of maximum visual angle is HFOV in the overall image capture lens group, and its relational expression is: HFOV=30.2 (degree).
In the 4th embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of these first lens 400 is f1, and its relational expression is: f/f1=1.81.
In the 4th embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of the 3rd lens 420 is f3, and its relational expression is: f/f3=0.93.
In the 4th embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of the 4th lens 430 is f4, and its relational expression is: f/f4=-0.99.
In the 4th embodiment image capture lens group, the refractive index of these first lens 400 is N1, and the refractive index of these second lens 410 is N2, and its relational expression is: | N1-N2|=0.088.
In the 4th embodiment image capture lens group, the thickness of the 3rd lens 420 on optical axis is CT3, and the focal length of overall image capture lens group is f, and its relational expression is: (CT3/f) * 100=15.7.
In the 4th embodiment image capture lens group, the abbe number of these first lens 400 is V1, and the abbe number of these second lens 410 is V2, and its relational expression is: V1-V2=32.5.
In the 4th embodiment image capture lens group, the thing side surface radius-of-curvature of these first lens 400 is R1, and the focal length of overall image capture lens group is f, and its relational expression is: R1/f=0.29.
In the 4th embodiment image capture lens group, the thickness of these second lens 410 on optical axis is CT2, and the focal length of overall image capture lens group is f, and the optics total length of this image capture lens group is TTL, and its relational expression is: (CT2/f) * TTL=0.62mm.
In the 4th embodiment image capture lens group, the distance of this aperture 440 to this imaging surface 460 on optical axis is SL, and the optics total length of this image capture lens group is TTL, and its relational expression is: SL/TTL=0.95.
In the 4th embodiment image capture lens group; This image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 460 places; Thing side surface 401 to the 4th lens 430 of these first lens 400 be Td as the distance of side surface 432 on optical axis; The half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and the focal length of overall image capture lens group is f, and its relational expression is: (Td/ImgH) * f=8.12mm.
In the 4th embodiment image capture lens group, these first lens 400 are T12 with the distance of these second lens 410 on optical axis, and the focal length of overall image capture lens group is f, and its relational expression is: (T12/f) * 100=1.3.
In the 4th embodiment image capture lens group, the thing side surface radius-of-curvature of these second lens 410 is R3, these second lens 410 be R4 as the side surface radius-of-curvature, its relational expression is: R3/R4=-12.33.
In the 4th embodiment image capture lens group; This image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 460 places; The optics total length of this image capture lens group is TTL; And the half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.81.
The detailed optical data of the 4th embodiment is shown in Figure 13 table seven, and its aspherical surface data is shown in Figure 14 table eight, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
" the 5th embodiment "
Fifth embodiment of the invention sees also Fig. 5 A, and the aberration curve of the 5th embodiment sees also Fig. 5 B.The image capture lens group of the 5th embodiment mainly is made up of four pieces of lens, is extremely comprised in regular turn as side by the thing side:
The 3rd lens 520 of the positive refracting power of one tool, its thing side surface 521 are that concave surface and picture side surface 522 are convex surface, and its material is a plastic cement, the thing side surface 521 of the 3rd lens 520, are all aspheric surface as side surface 522;
The 4th lens 530 of the negative refracting power of one tool; Its thing side surface 531 is that convex surface and picture side surface 532 are concave surface; Its material is a plastic cement; The thing side surface 531 of the 4th lens 530, be all aspheric surface as side surface 532, and the 4th lens 530 be provided with at least one point of inflexion as side surface 532; And
One aperture 540 places between object and this first lens 500;
Other includes an infrared ray filtering optical filter 550 and places looking like between a side surface 532 and the imaging surface 560 of the 4th lens 530; The material of this infrared ray filtering optical filter 550 is that glass and its do not influence the focal length of this image capture lens group of the present invention.
The equational expression of the 5th embodiment aspheric curve is as the pattern of first embodiment.
In the 5th embodiment image capture lens group, the focal length of overall image capture lens group is f, and its relational expression is: f=3.41 (millimeter).
In the 5th embodiment image capture lens group, the f-number of overall image capture lens group is Fno, and its relational expression is: Fno=2.85.
In the 5th embodiment image capture lens group, the half the of maximum visual angle is HFOV in the overall image capture lens group, and its relational expression is: HFOV=33.3 (degree).
In the 5th embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of these first lens 500 is f1, and its relational expression is: f/f1=1.36.
In the 5th embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of the 3rd lens 520 is f3, and its relational expression is: f/f3=0.49.
In the 5th embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of the 4th lens 530 is f4, and its relational expression is: f/f4=-0.27.
In the 5th embodiment image capture lens group, the refractive index of these first lens 500 is N1, and the refractive index of these second lens 510 is N2, and its relational expression is: | N1-N2|=0.088.
In the 5th embodiment image capture lens group, the thickness of the 3rd lens 520 on optical axis is CT3, and the focal length of overall image capture lens group is f, and its relational expression is: (CT3/f) * 100=16.8.
In the 5th embodiment image capture lens group, the abbe number of these first lens 500 is V1, and the abbe number of these second lens 510 is V2, and its relational expression is: V1-V2=32.5.
In the 5th embodiment image capture lens group, the thing side surface radius-of-curvature of these first lens 500 is R1, and the focal length of overall image capture lens group is f, and its relational expression is: R1/f=0.35.
In the 5th embodiment image capture lens group, the thickness of these second lens 510 on optical axis is CT2, and the focal length of overall image capture lens group is f, and the optics total length of this image capture lens group is TTL, and its relational expression is: (CT2/f) * TTL=0.33mm.
In the 5th embodiment image capture lens group, the distance of this aperture 540 to this imaging surface 560 on optical axis is SL, and the optics total length of this image capture lens group is TTL, and its relational expression is: SL/TTL=0.96.
In the 5th embodiment image capture lens group; This image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 560 places; Thing side surface 501 to the 4th lens 530 of these first lens 500 be Td as the distance of side surface 532 on optical axis; The half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and the focal length of overall image capture lens group is f, and its relational expression is: (Td/ImgH) * f=4.25mm.
In the 5th embodiment image capture lens group, these first lens 500 are T12 with the distance of these second lens 510 on optical axis, and the focal length of overall image capture lens group is f, and its relational expression is: (T12/f) * 100=5.1.
In the 5th embodiment image capture lens group, the thing side surface radius-of-curvature of these second lens 510 is R3, these second lens 510 be R4 as the side surface radius-of-curvature, its relational expression is: R3/R4=-3.29.
In the 5th embodiment image capture lens group; This image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 560 places; The optics total length of this image capture lens group is TTL; And the half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.79.
The detailed optical data of the 5th embodiment is shown in Figure 15 table nine, and its aspherical surface data is shown in Figure 16 table ten, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
" the 6th embodiment "
Sixth embodiment of the invention sees also Fig. 6 A, and the aberration curve of the 6th embodiment sees also Fig. 6 B.The image capture lens group of the 6th embodiment mainly is made up of four pieces of lens, is extremely comprised in regular turn as side by the thing side:
First lens 600 of the positive refracting power of one tool, its thing side surface 601 and be all convex surface as side surface 602, its material is a plastic cement, the thing side surface 601 of these first lens 600, is all aspheric surface as side surface 602;
Second lens 610 of the negative refracting power of one tool, its thing side surface 611 and be all concave surface as side surface 612, its material is a plastic cement, the thing side surface 611 of these second lens 610, is all aspheric surface as side surface 612;
The 3rd lens 620 of the positive refracting power of one tool, its thing side surface 621 are that concave surface and picture side surface 622 are convex surface, and its material is a plastic cement, the thing side surface 621 of the 3rd lens 620, are all aspheric surface as side surface 622;
The 4th lens 630 of the negative refracting power of one tool; Its thing side surface 631 is that convex surface and picture side surface 632 are concave surface; Its material is a plastic cement; The thing side surface 631 of the 4th lens 630, be all aspheric surface as side surface 632, and the 4th lens 630 be provided with at least one point of inflexion as side surface 632; And
One aperture 640 places between object and this first lens 600;
Other includes an infrared ray filtering optical filter 650 and places looking like between a side surface 632 and the imaging surface 660 of the 4th lens 630; The material of this infrared ray filtering optical filter 650 is that glass and its do not influence the focal length of this image capture lens group of the present invention.
The equational expression of the 6th embodiment aspheric curve is as the pattern of first embodiment.
In the 6th embodiment image capture lens group, the focal length of overall image capture lens group is f, and its relational expression is: f=4.23 (millimeter).
In the 6th embodiment image capture lens group, the f-number of overall image capture lens group is Fno, and its relational expression is: Fno=2.44.
In the 6th embodiment image capture lens group, the half the of maximum visual angle is HFOV in the overall image capture lens group, and its relational expression is: HFOV=40.1 (degree).
In the 6th embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of these first lens 600 is f1, and its relational expression is: f/f1=1.56.
In the 6th embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of the 3rd lens 620 is f3, and its relational expression is: f/f3=0.36.
In the 6th embodiment image capture lens group, the focal length of overall image capture lens group is f, and the focal length of the 4th lens 630 is f4, and its relational expression is: f/f4=-0.08.
In the 6th embodiment image capture lens group, the refractive index of these first lens 600 is N1, and the refractive index of these second lens 610 is N2, and its relational expression is: | N1-N2|=0.088.
In the 6th embodiment image capture lens group, the thickness of the 3rd lens 620 on optical axis is CT3, and the focal length of overall image capture lens group is f, and its relational expression is: (CT3/f) * 100=15.3.
In the 6th embodiment image capture lens group, the abbe number of these first lens 600 is V1, and the abbe number of these second lens 610 is V2, and its relational expression is: V1-V2=32.5.
In the 6th embodiment image capture lens group, the thing side surface radius-of-curvature of these first lens 600 is R1, and the focal length of overall image capture lens group is f, and its relational expression is: R1/f=1.34.
In the 6th embodiment image capture lens group, the thickness of these second lens 610 on optical axis is CT2, and the focal length of overall image capture lens group is f, and the optics total length of this image capture lens group is TTL, and its relational expression is: (CT2/f) * TTL=0.49mm.
In the 6th embodiment image capture lens group, the distance of this aperture 640 to this imaging surface 660 on optical axis is SL, and the optics total length of this image capture lens group is TTL, and its relational expression is: SL/TTL=1.00.
In the 6th embodiment image capture lens group; This image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 660 places; Thing side surface 601 to the 4th lens 630 of these first lens 600 be Td as the distance of side surface 632 on optical axis; The half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and the focal length of overall image capture lens group is f, and its relational expression is: (Td/ImgH) * f=4.51mm.
In the 6th embodiment image capture lens group, these first lens 600 are T12 with the distance of these second lens 610 on optical axis, and the focal length of overall image capture lens group is f, and its relational expression is: (T12/f) * 100=3.4.
In the 6th embodiment image capture lens group, the thing side surface radius-of-curvature of these second lens 610 is R3, these second lens 610 be R4 as the side surface radius-of-curvature, its relational expression is: R3/R4=-3.42.
In the 6th embodiment image capture lens group; This image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 660 places; The optics total length of this image capture lens group is TTL; And the half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.65.
The detailed optical data of the 6th embodiment is shown in Figure 17 table ten one, and its aspherical surface data is shown in table ten two A and table ten two B of Figure 18 A and Figure 18 B, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
Table one to table ten two (corresponding diagram 7 is to Figure 18 respectively) is depicted as the different numerical value change tables of image capture lens group embodiment of the present invention; The all true gained of testing of numerical value change of right each embodiment of the present invention; Even use different numerical value; The product of same structure must belong to protection category of the present invention, so above explanation is described and be graphic only as exemplary, non-in order to limit claim of the present invention.Table ten three (corresponding Figure 19) is the numerical data of the corresponding correlationship formula of the present invention of each embodiment.
Claims (21)
1. an image capture lens group is characterized in that, described image capture lens group is extremely comprised as side by the thing side in regular turn:
First lens of the positive refracting power of one tool, its thing side surface is a convex surface;
Second lens of the negative refracting power of one tool;
The 3rd lens of the positive refracting power of one tool, its thing side surface are concave surface, be convex surface as side surface, and the thing side surface of said the 3rd lens and be all aspheric surface as side surface;
The 4th lens of the negative refracting power of one tool, it is a concave surface as side surface, said the 4th lens be provided with at least one point of inflexion as side surface, and the thing side surface of said the 4th lens and be all aspheric surface as side surface; And
One aperture is arranged between object and said first lens;
Wherein, the number of lenses of tool refracting power is merely four in the said image capture lens group, and the focal length of overall image capture lens group is f; The focal length of said the 3rd lens is f3, and the focal length of said the 4th lens is f4, and the refractive index of said first lens is N1; The refractive index of said second lens is N2, and the thickness of said second lens on optical axis is CT2, and the thickness of said the 3rd lens on optical axis is CT3; The abbe number of said first lens is V1; The abbe number of said second lens is V2, and the thing side surface radius-of-curvature of said first lens is R1, and the optics total length of said image capture lens group is TTL; The distance of said aperture to imaging surface on optical axis is SL, satisfies the following relationship formula:
0.49≤f/f3＜0.95；
-1.00＜f/f4＜-0.01；
|N1-N2|＜0.12；
3.0＜(CT3/f)*100＜20.0；
30.5＜V1-V2＜42.0；
0.20＜R1/f＜0.60；
0.20mm＜(CT2/f)*TTL＜0.73mm；
0.93＜SL/TTL＜1.07。
2. image capture lens group as claimed in claim 1 is characterized in that, said second lens be concave surface as side surface.
3. image capture lens group as claimed in claim 2; It is characterized in that; Said image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging, the thing side surface of said first lens to said the 4th lens be Td as the distance of side surface on optical axis, the half the of said sense electronics optical element effective pixel area diagonal angle line length is ImgH; The focal length of overall image capture lens group is f, satisfies the following relationship formula:
(Td/ImgH)*f＜5.2mm。
4. image capture lens group as claimed in claim 2 is characterized in that, the thing side surface of said second lens is a concave surface, and the thing side surface of said the 4th lens is a convex surface.
5. image capture lens group as claimed in claim 2 is characterized in that, the focal length of overall image capture lens group is f, and the focal length of said first lens is f1, satisfies the following relationship formula:
1.25＜f/f1＜2.00。
6. image capture lens group as claimed in claim 5 is characterized in that, the focal length of overall image capture lens group is f, and the focal length of said first lens is f1, satisfies the following relationship formula:
1.50＜f/f1＜1.80。
7. image capture lens group as claimed in claim 2 is characterized in that, said first lens and the distance of said second lens on optical axis are T12, and the focal length of overall image capture lens group is f, satisfies the following relationship formula:
0.5＜(T12/f)*100＜6.0。
8. image capture lens group as claimed in claim 4 is characterized in that, the thickness of said second lens on optical axis is CT2, and the focal length of overall image capture lens group is f, and the optics total length of said image capture lens group is TTL, satisfies the following relationship formula:
0.25mm＜(CT2/f)*TTL＜0.45mm。
9. image capture lens group as claimed in claim 2 is characterized in that, the thing side surface radius-of-curvature of said first lens is R1, and the focal length of overall image capture lens group is f, satisfies the following relationship formula:
0.20＜R1/f＜0.40。
10. image capture lens group as claimed in claim 4 is characterized in that, the thing side surface radius-of-curvature of said second lens is R3, said second lens be R4 as the side surface radius-of-curvature, satisfy the following relationship formula:
R3/R4＜-1.2。
11. image capture lens group as claimed in claim 2 is characterized in that, the focal length of overall image capture lens group is f, and the focal length of said the 3rd lens is f3, and the focal length of said the 4th lens is f4, satisfies the following relationship formula:
0.49≤f/f3＜0.80；
-0.60＜f/f4＜-0.10。
12. image capture lens group as claimed in claim 1; It is characterized in that; Said image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging; The optics total length of said image capture lens group is TTL, and the half the of said sense electronics optical element effective pixel area diagonal angle line length is ImgH, satisfies the following relationship formula:
TTL/ImgH＜2.0。
13. an image capture lens group is characterized in that, described image capture lens group is extremely comprised as side by the thing side in regular turn:
First lens of the positive refracting power of one tool, its thing side surface are convex surface, be concave surface as side surface;
Second lens of the negative refracting power of one tool, it is a concave surface as side surface;
The 3rd lens of the positive refracting power of one tool, its thing side surface are concave surface, be convex surface as side surface, and the thing side surface of said the 3rd lens and be all aspheric surface as side surface;
The 4th lens of the negative refracting power of one tool, it is a concave surface as side surface, said the 4th lens be provided with at least one point of inflexion as side surface, and the thing side surface of said the 4th lens and be all aspheric surface as side surface; And
One aperture is arranged between object and said second lens;
Wherein, The number of lenses of tool refracting power is merely four in the said image capture lens group, and the focal length of overall image capture lens group is f, and the focal length of said the 3rd lens is f3; The focal length of said the 4th lens is f4; The refractive index of said first lens is N1, and the refractive index of said second lens is N2, satisfies the following relationship formula:
0.49≤f/f3＜0.95；
-1.00＜f/f4＜-0.01；
|N1-N2|＜0.12。
14. image capture lens group as claimed in claim 13 is characterized in that, the thing side surface of said second lens is a concave surface.
15. image capture lens group as claimed in claim 13 is characterized in that, the focal length of overall image capture lens group is f, and the focal length of said first lens is f1, satisfies the following relationship formula:
1.25＜f/f1＜2.00。
16. image capture lens group as claimed in claim 13 is characterized in that, the abbe number of said first lens is V1, and the abbe number of said second lens is V2, satisfies the following relationship formula:
30.5＜V1-V2＜42.0。
17. image capture lens group as claimed in claim 13 is characterized in that, the thickness of said the 3rd lens on optical axis is CT3, and the focal length of overall image capture lens group is f, satisfies the following relationship formula:
3.0＜(CT3/f)*100＜20.0。
18. image capture lens group as claimed in claim 14 is characterized in that, said first lens and the distance of said second lens on optical axis are T12, and the focal length of overall image capture lens group is f, satisfies the following relationship formula:
0.5＜(T12/f)*100＜6.0。
19. image capture lens group as claimed in claim 13 is characterized in that, the thing side surface radius-of-curvature of said first lens is R1, and the focal length of overall image capture lens group is f, satisfies the following relationship formula:
0.20＜R1/f＜0.40。
20. image capture lens group as claimed in claim 19; It is characterized in that; Said image capture lens group is provided with a sense electronics optical element in addition and supplies the object imaging, and the distance of said aperture to imaging surface on optical axis is SL, and the optics total length of said image capture lens group is TTL; The half the of said sense electronics optical element effective pixel area diagonal angle line length is ImgH, satisfies the following relationship formula:
0.93＜SL/TTL＜1.07；
TTL/ImgH＜2.0。
21. image capture lens group as claimed in claim 14 is characterized in that, the focal length of overall image capture lens group is f, and the focal length of said the 3rd lens is f3, and the focal length of said the 4th lens is f4, satisfies the following relationship formula:
0.49≤f/f3＜0.80；
-0.60＜f/f4＜-0.10。
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| CN201010115619A CN102156342B (en) | 2010-02-11 | 2010-02-11 | Image capturing lens group |
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| TWI472825B (en) * | 2013-11-13 | 2015-02-11 | Largan Precision Co Ltd | Image capturing lens system, imaging device and mobile terminal |
| CN105445901B (en) * | 2015-04-22 | 2018-01-09 | 玉晶光电(厦门)有限公司 | The electronic installation of this camera lens of optical imaging lens and application |
| CN107238911B (en) * | 2017-08-07 | 2022-08-09 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN107300756B (en) * | 2017-08-23 | 2019-12-10 | 浙江舜宇光学有限公司 | Camera lens |
| WO2019037466A1 (en) | 2017-08-23 | 2019-02-28 | 浙江舜宇光学有限公司 | Camera lens |
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| CN1979245A (en) * | 2005-12-01 | 2007-06-13 | 大立光电股份有限公司 | Four-piece type camera-lens group |
| CN101135766A (en) * | 2006-08-31 | 2008-03-05 | 大立光电股份有限公司 | Optical lens group for sampling image |
| CN101135768A (en) * | 2006-09-01 | 2008-03-05 | 大立光电股份有限公司 | Optical system for camera shooting |
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| CN1979245A (en) * | 2005-12-01 | 2007-06-13 | 大立光电股份有限公司 | Four-piece type camera-lens group |
| CN101135766A (en) * | 2006-08-31 | 2008-03-05 | 大立光电股份有限公司 | Optical lens group for sampling image |
| CN101135768A (en) * | 2006-09-01 | 2008-03-05 | 大立光电股份有限公司 | Optical system for camera shooting |
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