CN102478701B - Optical lens group - Google Patents
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- CN102478701B CN102478701B CN201010555453.2A CN201010555453A CN102478701B CN 102478701 B CN102478701 B CN 102478701B CN 201010555453 A CN201010555453 A CN 201010555453A CN 102478701 B CN102478701 B CN 102478701B
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Abstract
The invention discloses an optical lens group. The optical lens group sequentially comprises a fist lens of positive inflective power, a second lens of positive inflective power, a third lens of negative inflective power and a fourth lens of positive inflective power from an object side to an image side, wherein the object side surface of the third lens is a concave surface, the image side surface of the third lens is a convex surface, and at least one of the object side surface and the image side surface is an aspheric surface; the object side surface and the image side surface of the fourth lens are both aspheric surfaces; and the four lenses with inflective power are provided in the optical lens group.
Description
Technical field
The present invention is about a kind of optical lens group; Particularly about a kind of miniaturization optical lens group being applied on electronic product.
Background technology
Recent years, along with having the rise of portable electronic product of camera function, the demand of miniaturization pick-up lens day by day improves.And the photo-sensitive cell of general pick-up lens is nothing more than being sensitization coupling element (Charge Coupled Device, or two kinds of complementary matal-oxide semiconductor elements (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor) CCD).And due to progressing greatly of process technique, the Pixel Dimensions of photo-sensitive cell is dwindled, miniaturization pick-up lens, gradually toward the development of high pixel field, therefore, also increases the requirement of image quality day by day.Tradition is equipped on the miniaturization pick-up lens on portable electronic product, many employing three-chip type lens arrangements are main, lens combination is born the second lens of refracting power and the 3rd lens of the positive refracting power of a tool by thing side to the first lens, the tool that are sequentially the positive refracting power of a tool as side, as United States Patent (USP) the 7th, shown in 145, No. 736.Because the progress of process technique and electronic product are under the trend of lightening development, photo-sensitive cell Pixel Dimensions constantly dwindles, and system is improved more to the requirement of image quality, and known three-chip type lens combination cannot meet the more camera lens module of high-order.
United States Patent (USP) the 7th, has disclosed a kind of four-piece type lens combination for 660, No. 049, and wherein first lens is that a negative refracting power has half moon-shaped lens, can effectively eliminate aberration and the astigmatism of system, improves image quality.But the method causes the total length of system longer, and cannot improve the too high problem of the second positive lens susceptibility
Summary of the invention
The invention provides a kind of optical lens group, extremely sequentially comprised as side by thing side: the first lens of the positive refracting power of a tool; The second lens of the positive refracting power of one tool; The 3rd lens of the negative refracting power of one tool, its thing side surface is concave surface and is convex surface as side surface, this thing side with as having one side in side surface at least for aspheric surface; And the 4th lens of the positive refracting power of a tool, this thing side and be all aspheric surface as side surface; Wherein, in this optical lens group, the lens of tool refracting power are four; Wherein, the thickness of this first lens on optical axis is CT1, the thickness of these the second lens on optical axis is CT2, the thing side surface radius-of-curvature of the 4th lens is R7, the 4th lens be R8 as side surface radius-of-curvature, the thickness of the 4th lens on optical axis is CT4, and the focal length of overall optical lens group is f, is to meet following relationship:
0.0＜CT1/CT2＜0.6；
| R7/R8| < 1.0; And
0.25＜CT4/f＜0.85。
On the other hand, the invention provides a kind of optical lens group, extremely sequentially comprised as side by thing side: the first lens of the positive refracting power of a tool; The second lens of the positive refracting power of one tool, it is convex surface as side surface; The 3rd lens of the negative refracting power of one tool, its thing side surface is concave surface and is convex surface as side surface, the thing side surface of the 3rd lens be aspheric surface as at least one surface in side surface; And the 4th lens of the positive refracting power of a tool, its thing side surface is convex surface, the thing side surface of the 4th lens be all aspheric surface as side surface; Wherein, the thickness of this first lens on optical axis is CT1, the thickness of these the second lens on optical axis is CT2, the thickness of the 4th lens on optical axis is CT4, and the focal length of overall optical lens group is f, wherein, this optical lens group is separately provided with an aperture, to the 4th lens, as side surface, the distance on optical axis is Sd to this aperture, and to the 4th lens, as side surface, the distance on optical axis is Td to this first lens thing side surface, is to meet following relationship:
0.0＜CT1/CT2＜0.6；
0.25 < CT4/f < 0.85; And
0.75＜Sd/Td＜0.94。
By above-mentioned mirror group configuration mode, can effectively dwindle camera lens volume, reduce system sensitivity, obtain higher resolving power.In addition, known imaging lens system and infrared optical lens are the lens that need to use unlike material, infrared optical system lens use germanium or other materials (as: ZnSe mostly, ZnS etc.) make, but the optical lens group of this case, except good camera optical image quality can be provided, also can provide infrared optical system to carry out imaging, make the present invention's the range of application of optical lens group more more extensive than general camera-lens system.
In optical lens group of the present invention, the positive refracting power of this first lens tool, provides system required part refracting power, contributes to shorten the total length of this optical lens group; The positive refracting power of this second lens tool, can be beneficial to the refracting power that distributes this first lens, contributes to reduce the susceptibility of system; The 3rd lens tool is born refracting power, and the aberration that can effectively produce the positive refracting power of system makes corrections, and is conducive to the aberration of update the system simultaneously; The positive refracting power of the 4th lens tool, can be conducive to the higher order aberratons of update the system, improves the resolving power of this optical lens group.
In addition, can on the 3rd lens and the 4th lens, be provided with the point of inflexion, will more can effectively suppress from the light of axle visual field and be incident in the angle on photo-sensitive cell, and the further aberration of modified off-axis visual field.
Brief description of the drawings
The optical lens group schematic diagram of Figure 1A first embodiment of the invention;
The aberration curve figure of Figure 1B first embodiment of the invention;
The optical lens group schematic diagram of Fig. 2 A second embodiment of the invention;
The aberration curve figure of Fig. 2 B second embodiment of the invention;
The optical lens group schematic diagram of Fig. 3 A third embodiment of the invention;
The aberration curve figure of Fig. 3 B third embodiment of the invention;
The optical lens group schematic diagram of Fig. 4 A fourth embodiment of the invention;
The aberration curve figure of Fig. 4 B fourth embodiment of the invention;
The optical lens group schematic diagram of Fig. 5 A fifth embodiment of the invention;
The aberration curve figure of Fig. 5 B fifth embodiment of the invention;
The optical lens group schematic diagram of Fig. 6 A sixth embodiment of the invention;
The aberration curve figure of Fig. 6 B sixth embodiment of the invention;
Fig. 7 table one is the optical data of first embodiment of the invention;
Fig. 8 table two is the aspherical surface data of first embodiment of the invention;
Fig. 9 table three is the optical data of second embodiment of the invention;
Figure 10 table four is the aspherical surface data of second embodiment of the invention;
Figure 11 table five is the optical data of third embodiment of the invention;
Figure 12 table six is the aspherical surface data of third embodiment of the invention;
Figure 13 table seven is the optical data of fourth embodiment of the invention;
Figure 14 table eight is the aspherical surface data of fourth embodiment of the invention;
Figure 15 table nine is the optical data of fifth embodiment of the invention;
Figure 16 table ten is the aspherical surface data of fifth embodiment of the invention;
Figure 17 table ten one is the optical data of sixth embodiment of the invention;
Figure 18 table ten two is the aspherical surface data of sixth embodiment of the invention;
Figure 19 table ten three is the numerical data of first embodiment of the invention to the six embodiment correlationship formulas;
Figure 20 is the enlarged drawing of the 4th lens 140 in first embodiment of the invention.
Main element symbol description:
Aperture 100,200,300,400,500,600
First 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 second 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 3rd 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
The 4th lens 140,240,340,440,540,640
Thing side surface 141,241,341,441,541,641
Picture side surface 142,242,342,442,542,642
Infrared ray filtering optical filter 150,250,350,450,550,650
Cover glass 170,270,370
Imaging surface 160,260,360,460,560,660
The focal length of entirety optical lens group is f
The f-number of entirety optical lens group is Fno
In entirety optical lens group, the half at maximum visual angle is HFOV
The thickness of first lens on optical axis is CT1
The thickness of the second lens on optical axis is CT2
The thickness of the 4th lens on optical axis is CT4
The thing side surface radius-of-curvature of the second lens is R3
The second lens be R4 as side surface radius-of-curvature
The thing side surface radius-of-curvature of the 3rd lens is R5
The 3rd lens be R6 as side surface radius-of-curvature
The thing side surface radius-of-curvature of the 4th lens is R7
The 4th lens be R8 as side surface radius-of-curvature
The focal length of first lens is f1
The focal length of the second lens is f2
The focal length of the 4th lens is f4
The maximum magnitude position of passing through as side surface glazed thread of the 4th lens and the vertical range of optical axis are Y42
The 4th lens be SAG42 as position that on side surface, distance optical axis is Y42 with the distance that is tangential on the tangent plane on lens axis summit
Aperture to the distance on optical axis as side surface of the 4th lens is Sd
The thing side surface of first lens to the distance on optical axis as side surface of the 4th lens is Td
To imaging surface, the distance on optical axis is TTL to the thing side surface of first lens
The half of sense electronics optical element effective pixel area diagonal line length is ImgH
Embodiment
The invention provides a kind of optical lens group, extremely sequentially comprised as side by thing side: the first lens of the positive refracting power of a tool; The second lens of the positive refracting power of one tool; The 3rd lens of the negative refracting power of one tool, its thing side surface is concave surface and is convex surface as side surface, this thing side with as having one side in side surface at least for aspheric surface; And the 4th lens of the positive refracting power of a tool, this thing side and be all aspheric surface as side surface; Wherein, in this optical lens group, the lens of tool refracting power are four; Wherein, the thickness of this first lens on optical axis is CT1, the thickness of these the second lens on optical axis is CT2, the thing side surface radius-of-curvature of the 4th lens is R7, the 4th lens be R8 as side surface radius-of-curvature, the thickness of the 4th lens on optical axis is CT4, and the focal length of overall optical lens group is f, is to meet following relationship:
0.0＜CT1/CT2＜0.6；
| R7/R8| < 1.0; And
0.25＜CT4/f＜0.85。
When aforementioned optical lens group meets following relationship: when 0.0 < CT1/CT2 < 0.6, the thickness of this first lens and the second lens is comparatively suitable, can contribute to assembling and the space configuration of mirror group.Further, better system meets following relationship: 0.0 < CT1/CT2 < 0.35.When aforementioned optical lens group meets following relationship: | when R7/R8| < 1.0, the 4th lens thing side is comparatively suitable with the curvature of picture side surface, contributes to strengthen the positive refracting power of first lens, can effectively shorten optics total length.Further, better system meets following relationship: | R7/R8| < 0.70.Further, better system meets following relationship: | R7/R8| < 0.35.When aforementioned optical lens group meets following relationship: when 0.25 < CT4/f < 0.85, the thickness of the 4th lens is comparatively suitable, and more sufficient back focal length can be provided, to configure other required optical elements.Further, better system meets following relationship: 0.30 < CT4/f < 0.60.
In the aforementioned optical lens group of the present invention, preferably, these the second lens be convex surface as side surface.When the thing side surface of these the second lens is convex surface and while being convex surface as side surface, can contribute to strengthen the positive refracting power of these the second lens, be the refracting power that is conducive to distribute this first lens, to reduce the susceptibility of system; When the thing side surface of these the second lens is concave surface and while being convex surface as side surface, can effectively strengthen the astigmatism of update the system, contribute to the image quality of Hoisting System.。Preferably, the thing side surface of the 4th lens is convex surface, when the thing side surface of the 4th lens is convex surface and while being convex surface as side surface, contributes to shorten the total length of this optical lens group, reduces system sensitivity; When the thing side surface of the 4th lens is convex surface and while being concave surface as side surface, can contribute to astigmatism and the higher order aberratons of update the system.Preferably, the material of the 3rd lens is plastic cement, and the material of the 4th lens is plastic cement.
In the aforementioned optical lens group of the present invention, preferably, the thing side surface of the 4th lens be provided with at least one point of inflexion as at least one surface in side surface.
In the aforementioned optical lens group of the present invention, more comprise an aperture, to the 4th lens, as side surface, the distance on optical axis is Sd to this aperture, to the 4th lens, as side surface, the distance on optical axis is Td to this first lens thing side surface, preferably, be to meet following relationship: 0.75 < Sd/Td < 0.94.In the time that Sd/Td meets above-mentioned relation formula, be conducive to this optical lens group and in Wide-angle characteristic, obtain good effect.
In the aforementioned optical lens group of the present invention, the thing side surface radius-of-curvature of the 4th lens is R7, the 4th lens be R8 as side surface radius-of-curvature, preferably, be to meet following relationship: | R7/R8| < 0.70.
In the aforementioned optical lens group of the present invention, the thing side surface radius-of-curvature of the 3rd lens is R5, the 3rd lens be R6 as side surface radius-of-curvature, preferably, be to meet following relationship :-7 < (R5+R6)/(R5-R6) <-2.When (R5+R6)/(R5-R6) meet above-mentioned relation formula, contribute to the correction of system aberration.
In the aforementioned optical lens group of the present invention, the focal length of these the second lens is f2, and the focal length of the 4th lens is f4, preferably, is to meet following relationship: 0.75 < f2/f4 < 1.65.In the time that f2/f4 meets above-mentioned relation formula, the distribution of these second lens and the positive refracting power of the 4th lens is comparatively suitable, contributes to reduce the susceptibility of system.
In the aforementioned optical lens group of the present invention, the focal length of overall optical lens group is f, and the focal length of this first lens is f1, preferably, is to meet following relationship: 0.0 < f/f1 < 0.5.In the time that f/f1 meets above-mentioned relation formula, this first lens can provide components of system as directed positive refracting power, can contribute to shorten the optics total length of optical lens group.
In the aforementioned optical lens group of the present invention, these the second lens be R4 as side surface radius-of-curvature, the thing side surface radius-of-curvature of these the second lens is R3, preferably, is to meet following relationship: 0.1 < | R4/R3| < 0.7.When | when R4/R3| meets above-mentioned relation formula, be conducive to shorten the optics total length of optical lens group, and simultaneously effective update the system astigmatism.
In the aforementioned optical lens group of the present invention, the thing side surface radius-of-curvature of the 4th lens is R7, the 4th lens be R8 as side surface radius-of-curvature, preferably, be to meet following relationship: | R7/R8| < 0.35.
In the aforementioned optical lens group of the present invention, the thickness of this first lens on optical axis is CT1, and the thickness of these the second lens on optical axis is CT2, preferably, is to meet following relationship: 0.0 < CT1/CT2 < 0.35.
In the aforementioned optical lens group of the present invention, preferably, the thing side surface of the 3rd lens be provided with at least one point of inflexion as at least one surface in side surface.
In the aforementioned optical lens group of the present invention, preferably, the thing side surface of this first lens is convex surface and is concave surface as side surface.When the thing side surface of this first lens is convex surface and while being concave surface as side surface, comparatively favourable for the astigmatism (Astigmatism) of update the system.The thickness of the 4th lens on optical axis is CT4, and the focal length of overall optical lens group is f, preferably, is to meet following relationship: 0.30 < CT4/f < 0.60.In the time that CT4/f meets above-mentioned relation formula, the thickness of the 4th lens is comparatively suitable, and more sufficient back focal length can be provided, to configure other required optical elements.
In the aforementioned optical lens group of the present invention, the thing side surface radius-of-curvature of the 3rd lens is R5, the 3rd lens be R6 as side surface radius-of-curvature, preferably, be to meet following relationship :-4.0 < (R5+R6)/(R5-R6) <-2.0.When (R5+R6)/(R5-R6) meet above-mentioned relation formula, contribute to the correction of system aberration.
In the aforementioned optical lens group of the present invention, the maximum magnitude position of passing through as side surface glazed thread of the 4th lens and the vertical range of optical axis are Y42, the 4th lens be SAG42 as position that on side surface, distance optical axis is Y42 with the distance that is tangential on the tangent plane on lens axis summit, the thickness of the 4th lens on optical axis is CT4, preferably, be to meet following relationship :-0.45 < SAG42/CT4 < 0.3.In the time that SAG42/CT4 meets above-mentioned relation formula, the shape that can make the 4th lens can be too bending, except being conducive to the making and moulding of lens, more contributes to reduce the required space of eyeglass assembled configuration in mirror group, makes the configuration of mirror group can be more tight.
In the aforementioned optical lens group of the present invention, to imaging surface, the distance on optical axis is TTL to the thing side surface of this first lens, wherein this optical lens group separately arranges a sense electronics optical element in imaging surface, the half of this sense electronics optical element effective pixel area diagonal line length is ImgH, preferably, be to meet following relationship: TTL/ImgH < 3.5.In the time that TTL/ImgH meets above-mentioned relation formula, be conducive to maintain the miniaturization of this optical lens group, to be equipped on frivolous electronic product.
On the other hand, the invention provides a kind of optical lens group, extremely sequentially comprised as side by thing side: the first lens of the positive refracting power of a tool; The second lens of the positive refracting power of one tool, it is convex surface as side surface; The 3rd lens of the negative refracting power of one tool, its thing side surface is concave surface and is convex surface as side surface, the thing side surface of the 3rd lens be aspheric surface as at least one surface in side surface; And the 4th lens of the positive refracting power of a tool, its thing side surface is convex surface, the thing side surface of the 4th lens be all aspheric surface as side surface; Wherein, the thickness of this first lens on optical axis is CT1, the thickness of these the second lens on optical axis is CT2, the thickness of the 4th lens on optical axis is CT4, and the focal length of overall optical lens group is f, wherein, this optical lens group is separately provided with an aperture, to the 4th lens, as side surface, the distance on optical axis is Sd to this aperture, and to the 4th lens, as side surface, the distance on optical axis is Td to this first lens thing side surface, is to meet following relationship:
0.0＜CT1/CT2＜0.6；
0.25 < CT4/f < 0.85; And
0.75＜Sd/Td＜0.94。
When aforementioned optical lens group meets following relationship: when 0.0 < CT1/CT2 < 0.6, the thickness of this first lens and the second lens is comparatively suitable, can contribute to assembling and the space configuration of mirror group.Further, better system meets following relationship: 0.0 < CT1/CT2 < 0.35.
When aforementioned optical lens group meets following relationship: when 0.25 < CT4/f < 0.85, the thickness of the 4th lens is comparatively suitable, and more sufficient back focal length can be provided, to configure other required optical elements.
When aforementioned optical lens group meets following relationship: when 0.75 < Sd/Td < 0.94, be conducive to this optical lens group and obtain good effect in Wide-angle characteristic.
When aforementioned optical lens group in the thing side surface of the 3rd lens and the 4th lens with as side surface at least one surface while being provided with at least one point of inflexion, to more can effectively suppress from the light of axle visual field and be incident in the angle on photo-sensitive cell, and the further aberration of modified off-axis visual field.
In the aforementioned optical lens group of the present invention, this first lens thing side surface is convex surface and is concave surface as side surface, and the focal length of overall optical lens group is f, and the focal length of this first lens is f1, preferably, be to meet following relationship: 0.0 < f/f1 < 0.5.In the time that f/f1 meets above-mentioned relation formula, this first lens can provide components of system as directed positive refracting power, can contribute to shorten the optics total length of optical lens group.
In the aforementioned optical lens group of the present invention, preferably, the 3rd lens material is plastic cement, and the 4th lens material is plastic cement, and the 4th lens be provided with at least one point of inflexion as at least one surface in side surface and thing side surface.To more can effectively suppress from the light of axle visual field and be incident in the angle on photo-sensitive cell, and the further aberration of modified off-axis visual field.
In the aforementioned optical lens group of the present invention, the thing side surface radius-of-curvature of the 4th lens is R7, the 4th lens be R8 as side surface radius-of-curvature, preferably, be to meet following relationship: | R7/R8| < 0.70.When | when R7/R8| meets above-mentioned relation formula, the 4th lens thing side is comparatively suitable with the curvature of picture side surface, contributes to strengthen the positive refracting power of first lens, can effectively shorten optics total length.
In the aforementioned optical lens group of the present invention, the maximum magnitude position of passing through as side surface glazed thread of the 4th lens and the vertical range of optical axis are Y42, the 4th lens be SAG42 as position that on side surface, distance optical axis is Y42 with the distance that is tangential on the tangent plane on lens axis summit, the thickness of the 4th lens on optical axis is CT4, preferably, be to meet following relationship :-0.45 < SAG42/CT4 < 0.3.In the time that SAG42/CT4 meets above-mentioned relation formula, the shape that can make the 4th lens can be too bending, except being conducive to the making and moulding of lens, more contributes to reduce the required space of eyeglass assembled configuration in mirror group, makes the configuration of mirror group can be more tight.
In optical lens group of the present invention, the material of lens can be glass or plastic cement, if the material of lens is glass, can increase the degree of freedom of system refracting power configuration, if lens material is plastic cement, can effectively reduce production costs.
In optical lens group of the present invention, if lens surface is convex surface, represent that this lens surface is convex surface in paraxial place; If lens surface is concave surface, represent that this lens surface is concave surface in paraxial place.
In optical lens group of the present invention, the maximum magnitude position of passing through as side surface glazed thread of the 4th lens and the vertical range of optical axis are Y42, the 4th lens be SAG42 as position that on side surface, distance optical axis is Y42 with the distance that is tangential on the tangent plane on lens axis summit.Please refer to Figure 20, further describe distance and the relative position of Y42 and SAG42 representative.Figure 20 is the enlarged drawing of the 4th lens 140 in first embodiment of the invention (will in following description).The maximum magnitude position of passing through as side surface 142 glazed threads of the 4th lens 140 and the vertical range of optical axis are Y42, the 3rd lens 140 be SAG42 as position that on side surface 142, distance optical axis is Y42 2001 with the distance that is tangential on lens axis summit 2002 tangent plane.
Optical lens group of the present invention will coordinate appended graphic detailed description in detail by following specific embodiment.
" the first embodiment "
First embodiment of the invention refers to Figure 1A, and the aberration curve of the first embodiment refers to Figure 1B.The optical lens group of the first embodiment is mainly made up of four pieces of lens, is extremely sequentially comprised as side by thing side:
The first lens 110 of the positive refracting power of one tool, its thing side surface 111 is that convex surface and picture side surface 112 are concave surface, its material is plastic cement, the thing side surface 111 of this first lens 110 and be all aspheric surface as side surface 112;
The second lens 120 of the positive refracting power of one tool, its thing side surface 121 is for concave surface and be convex surface 122 as side surface, and its material is plastic cement, the thing side surface 121 of these the second lens 120 and be all aspheric surface as side surface 122;
The 3rd lens 130 of the negative refracting power of one tool, its thing side surface 131 be that concave surface and picture side surface 132 are convex surface, its material is plastic cement, the thing side surface 131 of the 3rd lens 130 and be all aspheric surface as side surface 132; And
The 4th lens 140 of the positive refracting power of one tool, its thing side surface 141 is that convex surface and picture side surface 142 are concave surface, its material is plastic cement, the thing side surface 141 of the 4th lens 140 and be all aspheric surface as side surface 142;
Wherein, this optical lens group is separately provided with an aperture 100 and is placed between this first lens 110 and this second lens 120, and a sense electronics optical element is set in imaging surface 160 places, for object imaging;
This optical lens group more includes an infrared ray filtering optical filter (IR-filter) 150 and a cover glass 170 is placed between the picture side surface 142 and this imaging surface 160 of the 4th lens 140; The material of this infrared ray filtering optical filter 150 is the focal length that glass and its do not affect optical lens group of the present invention.
The equation of above-mentioned aspheric curve is expressed as follows:
Wherein:
X: the point that in aspheric surface, distance optical axis is Y, itself and the relative height that is tangential on the tangent plane on summit on aspheric surface optical axis;
Y: the point in aspheric curve and the distance of optical axis;
K: conical surface coefficient;
Ai: i rank asphericity coefficient.
In the first embodiment optical lens group, the focal length of overall optical lens group is f, and its relational expression is: f=6.04 (millimeter).
In the first embodiment optical lens group, the f-number (f-number) of overall optical lens group is Fno, and its relational expression is: Fno=2.55.
In the first embodiment optical lens group, in overall optical lens group, the half at maximum visual angle is HFOV, and its relational expression is: HFOV=34.9 (degree).
In the first embodiment optical lens group, the thickness of this first lens 110 on optical axis is CT1, and the thickness of these the second lens 120 on optical axis is CT2, and its relational expression is: CT1/CT2=0.27.
In the first embodiment optical lens group, the thickness of the 4th lens (140) on optical axis is CT4, and the focal length of overall optical lens group is f, and its relational expression is: CT4/f=0.50.
In the first embodiment optical lens group, these the second lens 120 be R4 as side surface 122 radius-of-curvature, thing side surface 121 radius-of-curvature of these the second lens 120 are R3, its relational expression is: | R4/R3|=0.69.
In the first embodiment optical lens group, thing side surface 141 radius-of-curvature of the 4th lens 140 are R7, the 4th lens 140 be R8 as side surface 142 radius-of-curvature, its relational expression is: | R7/R8|=0.15.
In the first embodiment optical lens group, thing side surface 131 radius-of-curvature of the 3rd lens 130 are R5, the 3rd lens 130 be R6 as side surface 132 radius-of-curvature, its relational expression is: (R5+R6)/(R5-R6)=-4.97.
In the first embodiment optical lens group, the focal length of overall optical lens group is f, and the focal length of this first lens 110 is f1, and its relational expression is: f/f1=0.30.
In the first embodiment optical lens group, the focal length of these the second lens 120 is f2, and the focal length of the 4th lens 140 is f4, and its relational expression is: f2/f4=0.99.
In the first embodiment optical lens group, the maximum magnitude position of passing through as side surface 142 glazed threads of the 4th lens 140 and the vertical range of optical axis are Y42, the 4th lens 140 be SAG42 as position that on side surface 142, distance optical axis is Y42 with the distance that is tangential on the tangent plane on lens axis summit, its relational expression is: SAG42/CT4=-0.22.
In the first embodiment optical lens group, this aperture 100 to the distance on optical axis as side surface 142 of the 4th lens 140 is Sd, to the 4th lens 140, as side surface 142, the distance on optical axis is Td to the thing side surface 111 of this first lens 110, and its relational expression is: Sd/Td=0.90.
In the first embodiment optical lens group, the thing side surface 111 of this first lens 110 to the distance of this imaging surface on optical axis is TTL, and the half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: TTL/ImgH=3.42.
The detailed optical data of the first embodiment is as shown in Fig. 7 table one, and its aspherical surface data is as shown in Fig. 8 table two, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as the half at maximum visual angle.
" the second embodiment "
Second embodiment of the invention refers to Fig. 2 A, and the aberration curve of the second embodiment refers to Fig. 2 B.The optical lens group of the second embodiment is mainly made up of four pieces of lens, is extremely sequentially comprised as side by thing side:
The first lens 210 of the positive refracting power of one tool, its thing side surface 211 is that convex surface and picture side surface 212 are concave surface, its material is plastic cement, the thing side surface 211 of this first lens 210 and be all aspheric surface as side surface 212;
The second lens 220 of the positive refracting power of one tool, its thing side surface 221 is for convex surface and be convex surface 222 as side surface, and its material is plastic cement, the thing side surface 221 of these the second lens 220 and be all aspheric surface as side surface 222;
The 3rd lens 230 of the negative refracting power of one tool, its thing side surface 231 be that concave surface and picture side surface 232 are convex surface, its material is plastic cement, the thing side surface 231 of the 3rd lens 230 and be all aspheric surface as side surface 232; And
The 4th lens 240 of the positive refracting power of one tool, its thing side surface 241 is that convex surface and picture side surface 242 are convex surface, its material is plastic cement, the thing side surface 241 of the 4th lens 240 and be all aspheric surface as side surface 242;
Wherein, this optical lens group is separately provided with an aperture 200 and is placed between this first lens 210 and this second lens 220, and a sense electronics optical element is set in imaging surface 260 places, for object imaging;
This optical lens group more includes an infrared ray filtering optical filter (IR-filter) 250 and a cover glass 270 is placed between the picture side surface 242 and this imaging surface 260 of the 4th lens 240; The material of this infrared ray filtering optical filter 250 is the focal length that glass and its do not affect optical lens group of the present invention.
The equational expression of the second embodiment aspheric curve is as the form of the first embodiment.
In the second embodiment optical lens group, the focal length of overall optical lens group is f, and its relational expression is: f=5.88 (millimeter).
In the second embodiment optical lens group, the f-number (f-number) of overall optical lens group is Fno, and its relational expression is: Fno=2.80.
In the second embodiment optical lens group, in overall optical lens group, the half at maximum visual angle is HFOV, and its relational expression is: HFOV=31.0 (degree).
In the second embodiment optical lens group, the thickness of this first lens 210 on optical axis is CT1, and the thickness of these the second lens 220 on optical axis is CT2, and its relational expression is: CT1/CT2=0.26.
In the second embodiment optical lens group, the thickness of the 4th lens 240 on optical axis is CT4, and the focal length of overall optical lens group is f, and its relational expression is: CT4/f=0.47.
In the second embodiment optical lens group, these the second lens 220 be R4 as side surface 222 radius-of-curvature, thing side surface 221 radius-of-curvature of these the second lens 220 are R3, its relational expression is: | R4/R3|=0.36.
In the second embodiment optical lens group, thing side surface 241 radius-of-curvature of the 4th lens 240 are R7, the 4th lens 240 be R8 as side surface 242 radius-of-curvature, its relational expression is: | R7/R8|=0.04.
In the second embodiment optical lens group, thing side surface 231 radius-of-curvature of the 3rd lens 230 are R5, the 3rd lens 230 be R6 as side surface 232 radius-of-curvature, its relational expression is: (R5+R6)/(R5-R6)=-2.17.
In the second embodiment optical lens group, the focal length of overall optical lens group is f, and the focal length of this first lens 210 is f1, and its relational expression is: f/f1=0.26.
In the second embodiment optical lens group, the focal length of these the second lens 220 is f2, and the focal length of the 4th lens 240 is f4, and its relational expression is: f2/f4=0.80.
In the second embodiment optical lens group, the maximum magnitude position of passing through as side surface 242 glazed threads of the 4th lens 240 and the vertical range of optical axis are Y42, the 4th lens 240 be SAG42 as position that on side surface 242, distance optical axis is Y42 with the distance that is tangential on the tangent plane on lens axis summit, its relational expression is: SAG42/CT4=-0.36.
In the second embodiment optical lens group, this aperture 200 to the distance on optical axis as side surface 242 of the 4th lens 240 is Sd, to the 4th lens 240, as side surface 242, the distance on optical axis is Td to the thing side surface 211 of this first lens 210, and its relational expression is: Sd/Td=0.93.
In the second embodiment optical lens group, to imaging surface, the distance on optical axis is TTL to the thing side surface 211 of this first lens 210, and the half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: TTL/ImgH=2.94.
The detailed optical data of the second embodiment is as shown in Fig. 9 table three, and its aspherical surface data is as shown in Figure 10 table four, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as the half at maximum visual angle.
" the 3rd embodiment "
Third embodiment of the invention refers to Fig. 3 A, and the aberration curve of the 3rd embodiment refers to Fig. 3 B.The optical lens group of the 3rd embodiment is mainly made up of four pieces of lens, is extremely sequentially comprised as side by thing side:
The first lens 310 of the positive refracting power of one tool, its thing side surface 311 is that concave surface and picture side surface 312 are convex surface, its material is plastic cement, the thing side surface 311 of this first lens 310 and be all aspheric surface as side surface 312;
The second lens 320 of the positive refracting power of one tool, its thing side surface 321 is that concave surface and picture side surface 322 are convex surface, its material is plastic cement, the thing side surface 321 of these the second lens 320 and be all aspheric surface as side surface 322;
The 3rd lens 230 of the negative refracting power of one tool, its thing side surface 331 be that concave surface and picture side surface 332 are convex surface, its material is plastic cement, the thing side surface 331 of the 3rd lens 330 and be all aspheric surface as side surface 332; And
The 4th lens 340 of the positive refracting power of one tool, its thing side surface 341 is that convex surface and picture side surface 342 are concave surface, its material is plastic cement, the thing side surface 341 of the 4th lens 340 and be all aspheric surface as side surface 342;
Wherein, this optical lens group is separately provided with an aperture 300 and is placed between object and this first lens 310, and a sense electronics optical element is set in imaging surface 360 places, for object imaging;
This optical lens group more includes an infrared ray filtering optical filter (IR-filter) 350 and a cover glass 370 is placed between the picture side surface 342 and this imaging surface 360 of the 4th lens 340; The material of this infrared ray filtering optical filter 350 is the focal length that glass and its do not affect optical lens group of the present invention.
The equational expression of the 3rd embodiment aspheric curve is as the form of the first embodiment.
In the 3rd embodiment optical lens group, the focal length of overall optical lens group is f, and its relational expression is: f=5.99 (millimeter).
In the 3rd embodiment optical lens group, the f-number (f-number) of overall optical lens group is Fno, and its relational expression is: Fno=2.80.
In the 3rd embodiment optical lens group, in overall optical lens group, the half at maximum visual angle is HFOV, and its relational expression is: HFOV=31.0 (degree).
In the 3rd embodiment optical lens group, the thickness of this first lens 310 on optical axis is CT1, and the thickness of these the second lens 320 on optical axis is CT2, and its relational expression is: CT1/CT2=0.27.
In the 3rd embodiment optical lens group, the thickness of the 4th lens 340 on optical axis is CT4, and the focal length of overall optical lens group is f, and its relational expression is: CT4/f=0.33.
In the 3rd embodiment optical lens group, these the second lens 320 be R4 as side surface 322 radius-of-curvature, thing side surface 321 radius-of-curvature of these the second lens 320 are R3, its relational expression is: | R4/R3|=0.12.
In the 3rd embodiment optical lens group, thing side surface 341 radius-of-curvature of the 4th lens 340 are R7, the 4th lens 340 be R8 as side surface 342 radius-of-curvature, its relational expression is: | R7/R8|=0.86.
In the 3rd embodiment optical lens group, thing side surface 331 radius-of-curvature of the 3rd lens 330 are R5, the 3rd lens 330 be R6 as side surface 332 radius-of-curvature, its relational expression is: (R5+R6)/(R5-R6)=-2.37.
In the 3rd embodiment optical lens group, the focal length of overall optical lens group is f, and the focal length of this first lens 310 is f1, and its relational expression is: f/f1=0.78.
In the 3rd embodiment optical lens group, the focal length of these the second lens 320 is f2, and the focal length of the 4th lens 340 is f4, and its relational expression is: f2/f4=0.08.
In the 3rd embodiment optical lens group, the maximum magnitude position of passing through as side surface 342 glazed threads of the 4th lens 340 and the vertical range of optical axis are Y42, the 4th lens 340 be SAG42 as position that on side surface 342, distance optical axis is Y42 with the distance that is tangential on the tangent plane on lens axis summit, its relational expression is: SAG42/CT4=-0.36.
In the 3rd embodiment optical lens group, this aperture 300 to the distance on optical axis as side surface 342 of the 4th lens 340 is Sd, to the 4th lens 340, as side surface 342, the distance on optical axis is Td to the thing side surface 311 of this first lens 310, and its relational expression is: Sd/Td=1.01.
In the 3rd embodiment optical lens group, to imaging surface, the distance on optical axis is TTL to the thing side surface 311 of this first lens 310, and the half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: TTL/ImgH=2.94.
The detailed optical data of the 3rd embodiment is as shown in Figure 11 table five, and its aspherical surface data is as shown in Figure 12 table six, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as the half at maximum visual angle.
" the 4th embodiment "
Fourth embodiment of the invention refers to Fig. 4 A, and the aberration curve of the 4th embodiment refers to Fig. 4 B.The optical lens group of the 4th embodiment is mainly made up of four pieces of lens, is extremely sequentially comprised as side by thing side:
The first lens 410 of the positive refracting power of one tool, its thing side surface 411 is that convex surface and picture side surface 412 are concave surface, its material is plastic cement, the thing side surface 411 of this first lens 410 and be all aspheric surface as side surface 412;
The second lens 420 of the positive refracting power of one tool, its thing side surface 421 is that concave surface and picture side surface 422 are convex surface, its material is plastic cement, the thing side surface 421 of these the second lens 420 and be all aspheric surface as side surface 422;
The 3rd lens 430 of the negative refracting power of one tool, its thing side surface 431 be that concave surface and picture side surface 432 are convex surface, its material is plastic cement, the thing side surface 431 of the 3rd lens 430 and be all aspheric surface as side surface 432; And
The 4th lens 440 of the positive refracting power of one tool, its thing side surface 441 is that convex surface and picture side surface 442 are convex surface, its material is plastic cement, the thing side surface 441 of the 4th lens 440 and be all aspheric surface as side surface 442;
Wherein, this optical lens group is separately provided with an aperture 400 and is placed between this first lens 410 and this second lens 420, and a sense electronics optical element is set in imaging surface 460 places, for object imaging;
This optical lens group more includes an infrared ray filtering optical filter (IR-filter) 450 and is placed in looking like between side surface 442 and this imaging surface 460 of the 4th lens 440; The material of this infrared ray filtering optical filter 450 is the focal length that glass and its do not affect optical lens group of the present invention.
The equational expression of the 4th embodiment aspheric curve is as the form of the first embodiment.
In the 4th embodiment optical lens group, the focal length of overall optical lens group is f, and its relational expression is: f=6.00 (millimeter).
In the 4th embodiment optical lens group, the f-number (f-number) of overall optical lens group is Fno, and its relational expression is: Fno=2.45.
In the 4th embodiment optical lens group, in overall optical lens group, the half at maximum visual angle is HFOV, and its relational expression is: HFOV=35.7 (degree).
In the 4th embodiment optical lens group, the thickness of this first lens 410 on optical axis is CT1, and the thickness of these the second lens 420 on optical axis is CT2, and its relational expression is: CT1/CT2=0.32.
In the 4th embodiment optical lens group, the thickness of the 4th lens 440 on optical axis is CT4, and the focal length of overall optical lens group is f, and its relational expression is: CT4/f=0.50.
In the 4th embodiment optical lens group, these the second lens 420 be R4 as side surface 422 radius-of-curvature, thing side surface 421 radius-of-curvature of these the second lens 420 are R3, its relational expression is: | R4/R3|=0.48.
In the 4th embodiment optical lens group, thing side surface 441 radius-of-curvature of the 4th lens 440 are R7, the 4th lens 440 be R8 as side surface 442 radius-of-curvature, its relational expression is: | R7/R8|=0.03.
In the 4th embodiment optical lens group, thing side surface 431 radius-of-curvature of the 3rd lens 430 are R5, the 3rd lens 430 be R6 as side surface 432 radius-of-curvature, its relational expression is: (R5+R6)/(R5-R6)=-3.24.
In the 4th embodiment optical lens group, the focal length of overall optical lens group is f, and the focal length of this first lens 410 is f1, and its relational expression is: f/f1=0.18.
In the 4th embodiment optical lens group, the focal length of these the second lens 420 is f2, and the focal length of the 4th lens 440 is f4, and its relational expression is: f2/f4=1.30.
In the 4th embodiment optical lens group, the maximum magnitude position of passing through as side surface 442 glazed threads of the 4th lens 440 and the vertical range of optical axis are Y42, the 4th lens 440 be SAG42 as position that on side surface 442, distance optical axis is Y42 with the distance that is tangential on the tangent plane on lens axis summit, its relational expression is: SAG42/CT4=-0.24.
In the 4th embodiment optical lens group, this aperture 400 to the distance on optical axis as side surface 442 of the 4th lens 440 is Sd, to the 4th lens 440, as side surface 442, the distance on optical axis is Td to the thing side surface 411 of this first lens 410, and its relational expression is: Sd/Td=0.88.
In the 4th embodiment optical lens group, to imaging surface, the distance on optical axis is TTL to the thing side surface 411 of this first lens 410, and the half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: TTL/ImgH=3.41.
The detailed optical data of the 4th embodiment is as shown in Figure 13 table seven, and its aspherical surface data is as shown in Figure 14 table eight, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as the half at maximum visual angle.
" the 5th embodiment "
Fifth embodiment of the invention refers to Fig. 5 A, and the aberration curve of the 5th embodiment refers to Fig. 5 B.The optical lens group of the 5th embodiment is mainly made up of four pieces of lens, is extremely sequentially comprised as side by thing side:
The first lens 510 of the positive refracting power of one tool, its thing side surface 511 is that convex surface and picture side surface 512 are concave surface, its material is plastic cement, the thing side surface 511 of this first lens 510 and be all aspheric surface as side surface 512;
The second lens 520 of the positive refracting power of one tool, its thing side surface 521 is that convex surface and picture side surface 522 are convex surface, its material is plastic cement, the thing side surface 521 of these the second lens 520 and be all aspheric surface as side surface 522;
The 3rd lens 530 of the negative refracting power of one tool, its thing side surface 531 be that concave surface and picture side surface 532 are convex surface, its material is plastic cement, the thing side surface 531 of the 3rd lens 530 and be all aspheric surface as side surface 532; And
The 4th lens 540 of the positive refracting power of one tool, its thing side surface 541 is that convex surface and picture side surface 542 are concave surface, its material is plastic cement, the thing side surface 541 of the 4th lens 540 and be all aspheric surface as side surface 542;
Wherein, this optical lens group is separately provided with an aperture 500 and is placed between this first lens 510 and this second lens 520, and a sense electronics optical element is set in imaging surface 560 places, for object imaging;
This optical lens group more includes an infrared ray filtering optical filter (IR-filter) 550 and is placed in looking like between side surface 542 and this imaging surface 560 of the 4th lens 540; The material of this infrared ray filtering optical filter 550 is the focal length that glass and its do not affect optical lens group of the present invention.
The equational expression of the 5th embodiment aspheric curve is as the form of the first embodiment.
In the 5th embodiment optical lens group, the focal length of overall optical lens group is f, and its relational expression is: f=6.12 (millimeter).
In the 5th embodiment optical lens group, the f-number (f-number) of overall optical lens group is Fno, and its relational expression is: Fno=2.60.
In the 5th embodiment optical lens group, in overall optical lens group, the half at maximum visual angle is HFOV, and its relational expression is: HFOV=34.3 (degree).
In the 5th embodiment optical lens group, the thickness of this first lens 510 on optical axis is CT1, and the thickness of these the second lens 520 on optical axis is CT2, and its relational expression is: CT1/CT2=0.31.
In the 5th embodiment optical lens group, the thickness of the 4th lens 540 on optical axis is CT4, and the focal length of overall optical lens group is f, and its relational expression is: CT4/f=0.49.
In the 5th embodiment optical lens group, these the second lens 520 be R4 as side surface 522 radius-of-curvature, thing side surface 521 radius-of-curvature of these the second lens 520 are R3, its relational expression is: | R4/R3|=0.46.
In the 5th embodiment optical lens group, thing side surface 541 radius-of-curvature of the 4th lens 540 are R7, the 4th lens 540 be R8 as side surface 542 radius-of-curvature, its relational expression is: | R7/R8|=0.68.
In the 5th embodiment optical lens group, thing side surface 531 radius-of-curvature of the 3rd lens 530 are R5, the 3rd lens 530 be R6 as side surface 532 radius-of-curvature, its relational expression is: (R5+R6)/(R5-R6)=-6.37.
In the 5th embodiment optical lens group, the focal length of overall optical lens group is f, and the focal length of this first lens 510 is f1, and its relational expression is: f/f1=0.01.
In the 5th embodiment optical lens group, the focal length of these the second lens 520 is f2, and the focal length of the 4th lens 540 is f4, and its relational expression is: f2/f4=1.10.
In the 5th embodiment optical lens group, the maximum magnitude position of passing through as side surface 542 glazed threads of the 4th lens 540 and the vertical range of optical axis are Y42, the 4th lens 540 be SAG42 as position that on side surface 542, distance optical axis is Y42 with the distance that is tangential on the tangent plane on lens axis summit, its relational expression is: SAG42/CT4=0.28.
In the 5th embodiment optical lens group, this aperture 500 to the distance on optical axis as side surface 542 of the 4th lens 540 is Sd, to the 4th lens 540, as side surface 542, the distance on optical axis is Td to the thing side surface 511 of this first lens 510, and its relational expression is: Sd/Td=0.87.
In the 5th embodiment optical lens group, to imaging surface, the distance on optical axis is TTL to the thing side surface 511 of this first lens 510, and the half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: TTL/ImgH=3.38.
The detailed optical data of the 5th embodiment is as shown in Figure 15 table nine, and its aspherical surface data is as shown in Figure 16 table ten, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as the half at maximum visual angle.
" the 6th embodiment "
Sixth embodiment of the invention refers to Fig. 6 A, and the aberration curve of the 6th embodiment refers to Fig. 6 B.The optical lens group of the 6th embodiment is mainly made up of four pieces of lens, is extremely sequentially comprised as side by thing side:
The first lens 610 of the positive refracting power of one tool, its thing side surface 611 is that convex surface and picture side surface 612 are concave surface, its material is plastic cement, the thing side surface 611 of this first lens 610 and be all aspheric surface as side surface 612;
The second lens 620 of the positive refracting power of one tool, its thing side surface 621 is that concave surface and picture side surface 622 are convex surface, its material is plastic cement, the thing side surface 621 of these the second lens 620 and be all aspheric surface as side surface 622;
The 3rd lens 630 of the negative refracting power of one tool, its thing side surface 631 be that concave surface and picture side surface 632 are convex surface, its material is plastic cement, the thing side surface 631 of the 3rd lens 630 and be all aspheric surface as side surface 632; And
The 4th lens 640 of the positive refracting power of one tool, its thing side surface 641 is that convex surface and picture side surface 642 are convex surface, its material is plastic cement, the thing side surface 641 of the 4th lens 640 and be all aspheric surface as side surface 642;
Wherein, this optical lens group is separately provided with an aperture 600 and is placed between this first lens 610 and this second lens 620, and a sense electronics optical element is set in imaging surface 660 places, for object imaging;
This optical lens group more includes an infrared ray filtering optical filter (IR-filter) 650 and is placed in looking like between side surface 642 and this imaging surface 660 of the 4th lens 640; The material of this infrared ray filtering optical filter 650 is the focal length that glass and its do not affect optical lens group of the present invention.
The equational expression of the 6th embodiment aspheric curve is as the form of the first embodiment.
In the 6th embodiment optical lens group, the focal length of overall optical lens group is f, and its relational expression is: f=6.06 (millimeter).
In the 6th embodiment optical lens group, the f-number (f-number) of overall optical lens group is Fno, and its relational expression is: Fno=2.45.
In the 6th embodiment optical lens group, in overall optical lens group, the half at maximum visual angle is HFOV, and its relational expression is: HFOV=35.2 (degree).
In the 6th embodiment optical lens group, the thickness of this first lens 610 on optical axis is CT1, and the thickness of these the second lens 620 on optical axis is CT2, and its relational expression is: CT1/CT2=0.29.
In the 6th embodiment optical lens group, the thickness of the 4th lens 640 on optical axis is CT4, and the focal length of overall optical lens group is f, and its relational expression is: CT4/f=0.50.
In the 6th embodiment optical lens group, these the second lens 620 be R4 as side surface 622 radius-of-curvature, thing side surface 621 radius-of-curvature of these the second lens 620 are R3, its relational expression is: | R4/R3|=0.72.
In the 6th embodiment optical lens group, thing side surface 641 radius-of-curvature of the 4th lens 640 are R7, the 4th lens 640 be R8 as side surface 642 radius-of-curvature, its relational expression is: | R7/R8|=0.03.
In the 6th embodiment optical lens group, thing side surface 631 radius-of-curvature of the 3rd lens 630 are R5, the 3rd lens 630 be R6 as side surface 632 radius-of-curvature, its relational expression is: (R5+R6)/(R5-R6)=-341.
In the 6th embodiment optical lens group, the focal length of overall optical lens group is f, and the focal length of this first lens 610 is f1, and its relational expression is: f/f1=0.33.
In the 6th embodiment optical lens group, the focal length of these the second lens 620 is f2, and the focal length of the 4th lens 640 is f4, and its relational expression is: f2/f4=1.56.
In the 6th embodiment optical lens group, the maximum magnitude position of passing through as side surface 642 glazed threads of the 4th lens 640 and the vertical range of optical axis are Y42, the 4th lens 640 be SAG42 as position that on side surface 642, distance optical axis is Y42 with the distance that is tangential on the tangent plane on lens axis summit, its relational expression is: SAG42/CT4=-0.19.
In the 6th embodiment optical lens group, this aperture 600 to the distance on optical axis as side surface 642 of the 4th lens 640 is Sd, to the 4th lens 640, as side surface 642, the distance on optical axis is Td to the thing side surface 611 of this first lens 610, and its relational expression is: Sd/Td=0.90.
In the 6th embodiment optical lens group, to imaging surface, the distance on optical axis is TTL to the thing side surface 611 of this first lens 610, and the half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: TTL/ImgH=3.32.
The detailed optical data of the 6th embodiment is as shown in Figure 17 table ten one, and its aspherical surface data is as shown in Figure 18 table ten two, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as the half at maximum visual angle.
Table one is depicted as the different numerical value change tables of optical lens group embodiment of the present invention to table ten two (corresponding diagram 7 is to Figure 18 respectively); so all true gained of testing of numerical value change of each embodiment of the present invention; even if use different numerical value; the product of same structure must belong to protection category of the present invention; therefore above explanation is described and 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 (23)
1. an optical lens group, is characterized in that, described optical lens group is extremely sequentially comprised as side by thing side:
The first lens of the positive refracting power of one tool, its thing side surface is convex surface;
The second lens of the positive refracting power of one tool;
The 3rd lens of the negative refracting power of one tool, its thing side surface is concave surface and is convex surface as side surface, described thing side with as having one side in side surface at least for aspheric surface; And
The 4th lens of the positive refracting power of one tool, the thing side of the 4th described lens and be all aspheric surface as side surface;
Wherein, in described optical lens group, the lens of tool refracting power are four;
Wherein, the thickness of described first lens on optical axis is CT1, the thickness of the second described lens on optical axis is CT2, the thing side surface radius-of-curvature of the 4th described lens is R7, the 4th described lens be R8 as side surface radius-of-curvature, the described thickness of the 4th lens on optical axis is CT4, and the focal length of overall optical lens group is f, meets following relationship:
0.0<CT1/CT2<0.6；
| R7/R8|<1.0; And
0.25<CT4/f<0.85。
2. optical lens group as claimed in claim 1, is characterized in that, the second described lens be convex surface as side surface, the thing side surface of the 4th described lens is convex surface, the material of the 3rd described lens is plastic cement, the material of the 4th described lens is plastic cement.
3. optical lens group as claimed in claim 2, is characterized in that, the thing side surface of the 4th described lens be provided with at least one point of inflexion as at least one surface in side surface.
4. optical lens group as claimed in claim 3, it is characterized in that, described optical lens group more comprises an aperture, wherein to the 4th described lens, as side surface, the distance on optical axis is Sd to aperture, to the 4th described lens, as side surface, the distance on optical axis is Td to described first lens thing side surface, meets following relationship:
0.75<Sd/Td<0.94。
5. optical lens group as claimed in claim 3, is characterized in that, the thing side surface radius-of-curvature of the 4th described lens is R7, the 4th described lens be R8 as side surface radius-of-curvature, meet following relationship:
|R7/R8|<0.70。
6. optical lens group as claimed in claim 4, is characterized in that, the thing side surface radius-of-curvature of the 3rd described lens is R5, the 3rd described lens be R6 as side surface radius-of-curvature, meet following relationship:
-7<(R5+R6)/(R5-R6)<-2。
7. optical lens group as claimed in claim 4, is characterized in that, the focal length of the second described lens is f2, and the focal length of the 4th described lens is f4, meets following relationship:
0.75<f2/f4<1.65。
8. optical lens group as claimed in claim 4, is characterized in that, the focal length of overall optical lens group is f, and the focal length of described first lens is f1, meets following relationship:
0.0<f/f1<0.5。
9. optical lens group as claimed in claim 5, is characterized in that, the focal length of overall optical lens group is f, and the focal length of described first lens is f1, meets following relationship:
0.0<f/f1<0.5。
10. optical lens group as claimed in claim 5, is characterized in that, the second described lens be R4 as side surface radius-of-curvature, the thing side surface radius-of-curvature of the second described lens is R3, meets following relationship:
0.1<|R4/R3|<0.7。
11. optical lens group as claimed in claim 5, is characterized in that, the thing side surface radius-of-curvature of the 4th described lens is R7, the 4th described lens be R8 as side surface radius-of-curvature, meet following relationship:
|R7/R8|<0.35。
12. optical lens group as claimed in claim 5, is characterized in that, the thickness of described first lens on optical axis is CT1, and the thickness of the second described lens on optical axis is CT2, meets following relationship:
0.0<CT1/CT2<0.35。
13. optical lens group as claimed in claim 3, is characterized in that, the thing side surface of the 3rd described lens be provided with at least one point of inflexion as at least one surface in side surface.
14. optical lens group as claimed in claim 3, is characterized in that, described first lens be concave surface as side surface, the described thickness of the 4th lens on optical axis is CT4, the focal length of overall optical lens group is f, meets following relationship:
0.30<CT4/f<0.60。
15. optical lens group as claimed in claim 14, is characterized in that, the thing side surface radius-of-curvature of the 3rd described lens is R5, the 3rd described lens be R6 as side surface radius-of-curvature, meet following relationship:
-4.0<(R5+R6)/(R5-R6)<-2.0。
16. optical lens group as claimed in claim 14, it is characterized in that, the maximum magnitude position of passing through as side surface glazed thread of the 4th described lens and the vertical range of optical axis are Y42, the 4th described lens be SAG42 as position that on side surface, distance optical axis is Y42 with the distance that is tangential on the tangent plane on lens axis summit, the described thickness of the 4th lens on optical axis is CT4, meets following relationship:
-0.45<SAG42/CT4<0.3。
17. optical lens group as claimed in claim 1, it is characterized in that, described optical lens group separately comprises a sense electronics optical element in imaging surface, the thing side surface of described first lens to the distance of described imaging surface on optical axis is TTL, the half of described sense electronics optical element effective pixel area diagonal line length is ImgH, meets following relationship:
TTL/ImgH<3.5。
18. 1 kinds of optical lens group, is characterized in that, described optical lens group is extremely sequentially comprised as side by thing side:
The first lens of the positive refracting power of one tool;
The second lens of the positive refracting power of one tool, it is convex surface as side surface;
The 3rd lens of the negative refracting power of one tool, its thing side surface is concave surface and is convex surface as side surface, the thing side surface of the 3rd described lens be aspheric surface as at least one surface in side surface; And
The 4th lens of the positive refracting power of one tool, its thing side surface is convex surface, the thing side surface of the 4th described lens be all aspheric surface as side surface;
Wherein, the thickness of described first lens on optical axis is CT1, the thickness of the second described lens on optical axis is CT2, the described thickness of the 4th lens on optical axis is CT4, the focal length of entirety optical lens group is f, wherein, described optical lens group is separately provided with an aperture, to the 4th described lens, as side surface, the distance on optical axis is Sd to described aperture, to the 4th described lens, as side surface, the distance on optical axis is Td to described first lens thing side surface, meets following relationship:
0.0<CT1/CT2<0.6；
0.25<CT4/f<0.85; And
0.75<Sd/Td<0.94。
19. optical lens group as claimed in claim 18, is characterized in that, described first lens thing side surface is convex surface and is concave surface as side surface, and the focal length of overall optical lens group is f, and the focal length of described first lens is f1, meets following relationship:
0.0<f/f1<0.5。
20. optical lens group as claimed in claim 19, it is characterized in that, the 3rd described lens material is plastic cement, and the 4th described lens material is plastic cement, and the 4th described lens be provided with at least one point of inflexion as at least one surface in side surface and thing side surface.
21. optical lens group as claimed in claim 20, is characterized in that, the thing side surface radius-of-curvature of the 4th described lens is R7, the 4th described lens be R8 as side surface radius-of-curvature, meet following relationship:
|R7/R8|<0.70。
22. optical lens group as claimed in claim 20, it is characterized in that, the maximum magnitude position of passing through as side surface glazed thread of the 4th described lens and the vertical range of optical axis are Y42, the 4th described lens be SAG42 as position that on side surface, distance optical axis is Y42 with the distance that is tangential on the tangent plane on lens axis summit, the described thickness of the 4th lens on optical axis is CT4, meets following relationship:
-0.45<SAG42/CT4<0.3。
23. optical lens group as claimed in claim 20, is characterized in that, the thickness of described first lens on optical axis is CT1, and the thickness of the second described lens on optical axis is CT2, meets following relationship:
0.0<CT1/CT2<0.35。
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| CN201010555453.2A CN102478701B (en) | 2010-11-22 | 2010-11-22 | Optical lens group |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010555453.2A CN102478701B (en) | 2010-11-22 | 2010-11-22 | Optical lens group |
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| CN102478701B true CN102478701B (en) | 2014-06-04 |
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| TWI472793B (en) * | 2012-09-14 | 2015-02-11 | Largan Precision Co Ltd | Photographing optical lens system |
| CN106291881B (en) * | 2016-08-30 | 2018-08-31 | 北京控制工程研究所 | A kind of linear array static state infrared earth sensor optical system |
| CN109143533B (en) * | 2017-06-28 | 2021-03-16 | 宁波舜宇车载光学技术有限公司 | Optical lens |
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| CN101153952A (en) * | 2006-09-25 | 2008-04-02 | 富士能株式会社 | Imaging lens |
| CN201278038Y (en) * | 2008-02-14 | 2009-07-22 | 富士能株式会社 | Photographic lens and photographic device |
| CN201852989U (en) * | 2010-11-22 | 2011-06-01 | 大立光电股份有限公司 | Optical lens group |
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| JP4658517B2 (en) * | 2003-05-30 | 2011-03-23 | オリンパス株式会社 | Imaging optical system and electronic apparatus using the same |
| JP4965199B2 (en) * | 2006-09-05 | 2012-07-04 | 富士フイルム株式会社 | Imaging lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101153952A (en) * | 2006-09-25 | 2008-04-02 | 富士能株式会社 | Imaging lens |
| CN201278038Y (en) * | 2008-02-14 | 2009-07-22 | 富士能株式会社 | Photographic lens and photographic device |
| CN201852989U (en) * | 2010-11-22 | 2011-06-01 | 大立光电股份有限公司 | Optical lens group |
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