CN103135205A - Portable electronic device and optical imaging lens thereof - Google Patents
Portable electronic device and optical imaging lens thereof Download PDFInfo
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- CN103135205A CN103135205A CN2012104323559A CN201210432355A CN103135205A CN 103135205 A CN103135205 A CN 103135205A CN 2012104323559 A CN2012104323559 A CN 2012104323559A CN 201210432355 A CN201210432355 A CN 201210432355A CN 103135205 A CN103135205 A CN 103135205A
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Abstract
The invention relates to a portable electronic device and an optical imaging lens thereof, and provides the optical imaging lens which sequentially comprises five lens from an object side to an image side, wherein an object side surface of a fifth lens comprises a concave surface portion located in an area nearby an optical axis, and an image side surface comprises a protrusion surface portion located in an area nearby circumference. The invention provides a portable electronic device which comprises a machine shell and an image module which is installed in the machine shell, wherein the image module is composed of the optical lens, a lens cone, a module rear base unit and an image sensor. By means of the fact that features of concave-convex curved surface array and/or curved optical rotation of all the lenses are controlled, the length of the lens is shortened under the condition that a good optical property and a system performance are maintained.
Description
Technical field
The present invention is relevant with its optical imaging lens to a kind of portable electronic devices, and especially relevant with its optical imaging lens to the portable electronic devices of using five chip lens.
Background technology
In recent years, miniaturization, the slimming of mobile phone (mobile phone) have become designer trends, and the related development that affects the related optical imaging lens of this trend.The system length how can effectively reduce optical lens still can be kept enough optical properties simultaneously, is the R﹠D direction that industry is made great efforts always.
U.S. Patent number US7,480,105, US7,639,432, US7,486,449 and US7,684,127 have all disclosed respectively a kind of five optical lens that lens form, yet, this US7, it is negative positive and negative that the refractive index of first three sheet lens of 480,105 Patent Cases is respectively, and US7,639,432 Patent Cases, US7,486,449 Patent Cases and US7,684,127 Patent Cases are respectively negative just positive and negative and are just bearing and just bearing.Yet, such configuration and can't obtain good optical characteristics, and the lens system length of this four case drops on the length of 10～18mm left and right, and can't make device integral body reach the effect of slim light and handyization.
U.S. Patent Publication No. US2011/0013069, US2011/0249346 and U.S. Patent number US8,000,030 has also disclosed the optical lens that is comprised of five lens, and the refractive index of its first three sheet lens is configured to better positive and negative bearing.But because the configured in one piece of each lens also can't be taken into account the length of improving aberration and shortening camera lens, therefore be considered under the prerequisite of image quality, this optical imaging lens overall length also can't effectively shorten.For example, system's total length of partial lens still remains to be improved still up to the 6.0mm left and right.
In view of this, need at present the system length of effective reduction optical lens badly, and keep simultaneously favorable optical performance.
Summary of the invention
The object of the present invention is to provide a kind of portable electronic devices and its optical imaging lens, arrange and/or bend the characteristic of optical activity by the concave-convex curved surface of controlling each lens, and keeping favorable optical performance and keeping under the condition of system performance, shorten lens length.
According to the present invention, provide a kind of optical imaging lens, from the thing side to sequentially comprising as side: an aperture, a first lens, one second lens, one the 3rd lens, one the 4th lens, and one the 5th lens.First lens has positive refractive index, comprises one towards the thing side of thing side, and this thing side is a convex surface.The second lens have negative refractive index, and the 3rd lens have negative refractive index.The 5th lens comprise one day to the thing side of thing side and one towards the picture side of picture side, and this thing side comprises that one is positioned at the concave surface section of optical axis near zone, and this comprises that as the side one is positioned at the convex surface part of circumference near zone.In this optical imaging lens, the eyeglass that integral body has refractive index only only has five lens.
According to one embodiment of the present invention, can additionally control the difference of other parameter or the relevance of ratio, as: optionally control between first lens and the 5th lens and sum up (representing with AAG), the center thickness of the 5th lens on optical axis (with CT in four clearances on optical axis
5Expression) satisfy following relational expression:
AAG/CT
5〉=3.0 relational expressions (1);
Or second the clearance on optical axis between lens and the 3rd lens (with AGL
23Expression) clearance on optical axis is (with AGL and between the 4th lens and the 5th lens
45Expression) satisfy following relational expression:
0≤AGL
23-AGL
45≤ 0.4 (mm) relational expression (2);
Or the effective focal length of optical imaging lens (Effective focal length) (representing with EFL) and the thickness summation (with ALT represent) of this five lens on optical axis
EFL/ALT 〉=1.8 relational expressions (3); Or
EFL/ALT 〉=1.9 relational expressions (3');
Or the center thickness of the 4th lens on optical axis is (with CT
4The expression) and the back focal length (Back focal length) (representing with BFL) of optical imaging lens satisfy following relational expression:
CT
4/ BFL≤0.7 relational expression (4); Or
CT
4/ BFL≤0.5 relational expression (4');
Or ALT and BFL satisfy following relational expression:
ALT/BFL≤2.0 relational expressions (5); Or
ALT/BFL≤1.5 relational expressions (5');
Or CT
4With AGL
23Satisfy following relational expression:
CT
4/ AGL
23≤ 3.0 relational expressions (6);
Aforementioned listed exemplary qualified relation formula also optionally merges and is applied in embodiments of the invention, is not limited to this.
According to one embodiment of the present invention, can go out for single lens or popularity ground the thin section structures such as concave-convex curved surface arrangement of other more lens for a plurality of lens additional designs, to strengthen the control to system performance and/or resolution, as: for the 4th lens, design one towards the thing side of thing side, make this thing side comprise that one is positioned at the concave surface section of circumference near zone; Or for the second lens, design one towards the thing side of thing side, and make this thing side comprise that one is positioned at the convex surface part of circumference near zone, so be not limited to this.
The present invention can provide a kind of electronic installation according to aforesaid various optical imaging lens, and comprising: a casing and an image module are installed in this casing.Image module comprises according to arbitrary optical imaging lens of the present invention, a lens barrel, a module back seat unit, a substrate and an image sensor.Lens barrel arranges optical imaging lens with supply, and module back seat unit arranges lens barrel with supply, and substrate arranges module back seat unit with supply, and image sensor is the picture side that is arranged at substrate and is positioned at optical imaging lens.
According to one embodiment of the present invention, aforementioned modules back seat unit can arrange lens barrel and can move along the optical axis direction of optical imaging lens with supply including but not limited to a pedestal.
By can learn in above-mentioned, portable electronic devices of the present invention and its optical imaging lens are arranged and/or bend the design of optical activity by the concave-convex curved surface of controlling each lens, keeping favorable optical performance, and effectively shorten lens length.
Description of drawings
Fig. 1 represents the cross-sectional view according to five chip lens of the optical imaging lens of the first embodiment of the present invention.
Fig. 2 represents according to the longitudinal spherical aberration of the optical imaging lens of the first embodiment of the present invention and every aberration diagram schematic diagram.
Fig. 3 represents another cross-sectional view according to lens of the optical imaging lens of the first embodiment of the present invention.
Fig. 4 represents the detailed optical data according to each eyeglass of first embodiment of the present invention optical imaging lens.
Fig. 5 represents the aspherical surface data according to the optical imaging lens of the first embodiment of the present invention.
Fig. 6 represents the cross-sectional view according to five chip lens of the optical imaging lens of the second embodiment of the present invention.
Fig. 7 represents according to the longitudinal spherical aberration of second embodiment of the present invention optical imaging lens and every aberration diagram schematic diagram.
Fig. 8 represents the detailed optical data according to each eyeglass of the optical imaging lens of the second embodiment of the present invention.
Fig. 9 represents the aspherical surface data according to the optical imaging lens of the second embodiment of the present invention.
Figure 10 represents the cross-sectional view according to five chip lens of the optical imaging lens of the third embodiment of the present invention.
Figure 11 represents according to the longitudinal spherical aberration of third embodiment of the present invention optical imaging lens and every aberration diagram schematic diagram.
Figure 12 represents the detailed optical data according to each eyeglass of the optical imaging lens of the third embodiment of the present invention.
Figure 13 represents the aspherical surface data according to the optical imaging lens of the third embodiment of the present invention.
Figure 14 represents the cross-sectional view according to five chip lens of the optical imaging lens of the fourth embodiment of the present invention.
Figure 15 represents according to the longitudinal spherical aberration of fourth embodiment of the present invention optical imaging lens and every aberration diagram schematic diagram.
Figure 16 represents the detailed optical data according to each eyeglass of the optical imaging lens of the fourth embodiment of the present invention.
Figure 17 represents the aspherical surface data according to the optical imaging lens of the fourth embodiment of the present invention.
Figure 18 represents the cross-sectional view according to five chip lens of the optical imaging lens of the fifth embodiment of the present invention.
Figure 19 represents according to the longitudinal spherical aberration of fifth embodiment of the present invention optical imaging lens and every aberration diagram schematic diagram.
Figure 20 represents the detailed optical data according to each eyeglass of the optical imaging lens of the fifth embodiment of the present invention.
Figure 21 represents the aspherical surface data according to the optical imaging lens of the fifth embodiment of the present invention.
Figure 22 represents the cross-sectional view according to five chip lens of the optical imaging lens of the sixth embodiment of the present invention.
Figure 23 represents according to the longitudinal spherical aberration of sixth embodiment of the present invention optical imaging lens and every aberration diagram schematic diagram.
Figure 24 represents the detailed optical data according to each eyeglass of the optical imaging lens of the sixth embodiment of the present invention.
Figure 25 represents the aspherical surface data according to the optical imaging lens of the sixth embodiment of the present invention.
AAG/CT of foundation above six embodiment of the present invention that Figure 26 is shown
5, AGL
23-AGL
45, EFL/ALT, CT
4/ BFL, ALT/BFL and CT
4/ AGL
23The comparison sheet of value.
Figure 27 represents the structural representation according to the portable electronic devices of one embodiment of the invention.
Figure 28 represents the structural representation according to the portable electronic devices of another embodiment of the present invention.
[primary clustering symbol description]
Embodiment
For further illustrating each embodiment, the invention provides Figure of description.These Figure of description are the part of disclosure of the present invention, and it is mainly that embodiment is described, and can coordinate the associated description of instructions to explain the operation principles of embodiment.Cooperation is with reference to these contents, and this area has embodiment and the advantage of the present invention of knowing that usually the knowledgeable will be understood that other is possible.Assembly in figure and not drawn on scale, and similarly element numbers is commonly used to assembly like representation class.
Optical imaging lens of the present invention, be by from the thing side to a first lens that sequentially arranges as side, one second lens, one the 3rd lens, one the 4th lens, and one the 5th lens consisted of, the eyeglass that integral body has refractive index only only has five lens.See through the detail characteristic of each lens of design, and good optical property can be provided, and shorten lens length, the detail characteristic of each lens is as follows: first lens has positive refractive index, comprises one towards the thing side of thing side, and this thing side is a convex surface.The second lens have negative refractive index, and the 3rd lens have negative refractive index.The 5th lens comprise one day to the thing side of thing side and one towards the picture side of picture side, and this thing side comprises that one is positioned at the concave surface section of optical axis near zone, and this comprises that as the side one is positioned at the convex surface part of circumference near zone.
Characteristic at aforementioned each eyeglass of this design is mainly to consider optical characteristics and the lens length of optical imaging lens, and for instance: first lens has positive refractive index, can provide optical imaging lens whole required positive refractive index.The second lens and the 3rd lens all have negative refractive index, help to improve the aberration that first lens produces, and the 5th lens thing side of can jointly arranging in pairs or groups reaches near concave surface section and the picture side convex surface part circumference of optical axis near zone the effect of improving aberration.In addition, if further, the second lens thing side circumference near zone is designed to have convex surface part, or the 4th lens thing side circumference near zone design is had concave surface section, also can reach equally the effect of improving aberration.
In one embodiment of this invention, also can additionally control other along the lens thickness on optical axis and/or along the relevance of the lens thickness on optical axis and airspace summation, as: optionally control between first lens and the 5th lens at four the clearances sum totals (representing with AAG) on optical axis, the center thickness of the 5th lens on optical axis (with CT
5Expression) satisfy following relational expression:
AAG/CT
5〉=3.0 relational expressions (1);
Or second the clearance on optical axis between lens and the 3rd lens (with AGL
23Expression) clearance on optical axis is (with AGL and between the 4th lens and the 5th lens
45Expression) satisfy following relational expression:
0≤AGL
23-AGL
45≤ 0.4 (mm) relational expression (2);
Or the effective focal length of optical imaging lens (Effective focal length) (representing with EFL) and the thickness summation (with ALT represent) of this five lens on optical axis
EFL/ALT 〉=1.8 relational expressions (3); Or
EFL/ALT 〉=1.9 relational expressions (3');
Or the center thickness of the 4th lens on optical axis is (with CT
4The expression) and the back focal length (Back focal length) (representing with BFL) of optical imaging lens satisfy following relational expression:
CT
4/ BFL≤0.7 relational expression (4); Or
CT
4/ BFL≤0.5 relational expression (4');
Or ALT and BFL satisfy following relational expression:
ALT/BFL≤2.0 relational expressions (5); Or
ALT/BFL≤1.5 relational expressions (5');
Or CT
4With AGL
23Satisfy following relational expression:
CT
4/ AGL
23≤ 3.0 relational expressions (6);
Aforementioned listed exemplary qualified relation also optionally merges and is applied in embodiments of the invention, is not limited to this.
AAG/CT
5Value is preferably more than or equal to 3 satisfying aforementioned relational expression (1), when near the thickness of the 5th lens optical axis enough thin (be CT
5Enough little), and as the side when the circumference near zone has convex surface part, its near optical axis and near the refractive index circumference will be obviously different, imaging light is focused on same plane as much as possible, help to improve image quality.Under the compact designer trends of optical imaging lens, AAG and CT
5Though will dwindle together, yet work as CT
5The amplitude of dwindling during than AAG more remarkable (being that AAG is larger), AAG/CT for example
5More than or equal to 3 o'clock, its effect of improving image quality was quite obvious, and in addition, AAG/CT is controlled in suggestion
5Value is between 3～10.
AGL
23-AGL
45The value suggestion is more than or equal to 0 (mm), that is the spacing between the second lens and the 3rd lens is greater than the spacing between the 4th lens and the 5th lens.Because the negative refractive index of the second lens is to diverge to picture light, if therefore possess enough distance between the second lens and the 3rd lens, can make imaging light after being dissipated into suitable degree, then enter the 3rd lens, help to improve image quality.The spacing that shortens between the 4th lens and the 5th lens can help to shorten system's overall length, so AGL
23-AGL
45Suggestion should be greater than 0 (mm), however AGL
23With AGL
45Difference also unsuitable excessive, be preferably between 0～0.4 (mm) to satisfy aforementioned relational expression (2).
EFL/ALT value suggestion is more than or equal to 1.5, be shortening because of EFL can make imaging light shorter apart from inner focusing, help to shorten the length of system, but EFL can change along with the gross thickness (being ALT) of eyeglass.Under the compact designer trends of optical imaging lens, as EFL/ALT greater than 1.5 the time, EFL and ALT can obtain good collocation, be preferably EFL/ALT value is controlled to be between 1.8～5.0 or 1.9～5.0, to satisfy aforementioned relational expression (3) or aforementioned relational expression (3').
CT
4The suggestion of/BFL value is to be less than or equal to 0.7 to satisfy aforementioned relational expression (4), is due to CT
4Dwindle and can help to shorten the optical imaging lens total length, and the Numerical Control of BFL can help to keep the space of infrared filter, therefore preferably make CT
4/ BFL satisfies aforementioned relational expression (4'), more preferably makes it between 0.1～0.5.
ALT/BFL value suggestion is to be less than or equal to 2.0 to satisfy aforementioned relational expression (5), be because of ALT reduce help to shorten the camera lens total length, meet the compact designer trends of optical imaging lens.Yet, between the 5th lens and imaging surface (both are BFL along the spacing of optical axis), in certain embodiments, need to keep in order to holding the sufficient space of infrared filter, but the invention is not restricted to this.Therefore, greater than 2.0 the time, may be excessive due to ALT or BFL too small institute causes as ALT/BFL, the trend that can't meet design, make ALT/BFL value satisfy aforementioned relational expression (5') therefore be preferably, or more preferably, make ALT/BFL value between 0.2～1.5.
CT
4/ AGL
23Suggestion be less than or equal 3.0 to satisfy aforementioned relational expression (6), this is due to CT
4Dwindle and can help to shorten the camera lens total length, and AGL
23Numerical Control can make imaging light enter again the 3rd lens being expanded to suitable degree.The better CT that makes
4/ AGL
23Value is between 0.5～3.0.
When enforcement is of the present invention, except above-mentioned relevance, also can go out for single lens or popularity ground thin section's structure and/or the optical activitys in the wrong such as concave-convex curved surface arrangement of other more lens for a plurality of lens additional designs, to strengthen the control to system performance and/or resolution, as following a plurality of embodiment.It is noted that, also can be under conflict free situation in characteristics such as this listed exemplary thin section structure and/or optical activitys in the wrong, optionally merging is applied in the middle of other embodiments of the invention, is not limited to this.
In order to illustrate that the present invention can shorten lens length really when good optical property is provided, below provide a plurality of embodiment with and detailed optical data.At first please in the lump referring to figs. 1 to Fig. 5, wherein Fig. 1 represents the cross-sectional view according to five chip lens of the optical imaging lens of the first embodiment of the present invention; Fig. 2 represents according to the longitudinal spherical aberration of the optical imaging lens of the first embodiment of the present invention and every aberration diagram schematic diagram; Fig. 3 represents another cross-sectional view according to lens of the optical imaging lens of the first embodiment of the present invention; Fig. 4 represents the detailed optical data according to each eyeglass of first embodiment of the present invention optical imaging lens; Fig. 5 represents the aspherical surface data according to the optical imaging lens of the first embodiment of the present invention.As shown in fig. 1, the optical imaging lens 1 of the present embodiment is from thing side A1 to sequentially comprising as side A2 an aperture (Aperture Stop) 100, one first lens 110, one second lens 120, one the 3rd lens 130, one the 4th lens 140 and one the 5th lens 150 that are placed between object side and a first lens 110.One imaging surface 170 of one optical filtering part 160 and an image sensor all is arranged at the picture side A2 of optical imaging lens 1.Optical filtering part 160 is exemplarily an infrared filter (IR Cut Filter) at this, be located between the 5th lens 150 and imaging surface 170, optical filtering part 160 will filter out through the light of optical imaging lens 1 wavelength of specific band, as: filter out the infrared ray wave band, the wavelength of the infrared ray wave band that human eye can't see can not imaged on imaging surface 170.
The thin section structure of each lens of optical imaging lens 1 is as follows:
The second lens 120 have negative refractive index, and it is consisted of by plastic material, and have thing side 121 and the picture side 122 towards picture side A2 towards thing side A1.Thing side 121 is a convex surface, and is a concave surface as side 122.Thing side 121 also has one in the convex surface part 1212 of circumference near zone.
The 3rd lens 130 have negative refractive index, and it is consisted of by plastic material, and have thing side 131 and the picture side 132 towards picture side A2 towards thing side A1.Thing side 131 is a concave surface, and is a convex surface as side 132.
The 4th lens 140 have positive refractive index, and it is consisted of by plastic material, and have one towards the thing side 141 of thing side A1 and have a picture side 142 towards picture side A2.Thing side 141 is a concave surface, and is a convex surface as side 142.Thing side 141 also has one in the concave surface section 1412 of circumference near zone.
The 5th lens 150 have negative refractive index, and it is consisted of by plastic material, and have one towards the thing side 151 of thing side A1, and a picture side 152 towards picture side A2.Thing side 151 is a concave surface, and has one in concave surface section 1521 and the convex surface part 1522 at the circumference near zone of optical axis near zone as side 152.
in the present embodiment, the design lens, optical filtering part 160, and all there is the airspace between the imaging surface 170 of image sensor, as: there is airspace d1 between first lens 110 and the second lens 120, there is airspace d2 between the second lens 120 and the 3rd lens 130, there is airspace d3 between the 3rd lens 130 and the 4th lens 140, there is airspace d4 between the 4th lens 140 and the 5th lens 150, there is airspace d5 between the 5th lens 150 and optical filtering part 160, and there is airspace d6 between the imaging surface 170 of optical filtering part 160 and image sensor, yet in other embodiments, also can not have aforementioned wherein arbitrary airspace, as: be designed to the surface profile of two relative lens corresponding each other, and can fit each other, to eliminate airspace therebetween.Hence one can see that, and the summation of airspace d1, d2, d3, d4 is AAG.
About each optical characteristics of each lens in the optical imaging lens 1 of the present embodiment and the thickness of each airspace, please refer to Fig. 4, wherein AAG/CT
5, AGL
23-AGL
45, EFL/ALT, CT
4/ BFL, ALT/BFL and CT
4/ AGL
23Value be respectively:
AAG/CT
5=3.104, really satisfy relational expression (1);
AGL
23-AGL
45=0.250 (mm) satisfies relational expression (2) really;
EFL/ALT=2.006 satisfies relational expression (3), (3') really;
CT
4/ BFL=0.414 satisfies relational expression (4), (4') really;
ALT/BFL=1.369 satisfies relational expression (5), (5') really;
CT
4/ AGL
23=1.268, really satisfy relational expression (6);
Thickness from first lens thing side convex surface 111 to imaging surface 170 is 4.876 (mm), really shortens the lens length of optical imaging lens 1.
It is noted that at this, in the present invention, show for the sake of simplicity the structure of each lens, only be shown as the part of passing through as light, for instance, take first lens 110 as example, as shown in Figure 1, comprise thing side 111 and picture side 112.Yet, when implementing each lens of the present embodiment, optionally additionally comprise a fixed part, be arranged in this optical imaging lens for these some lens.Equally take first lens 110 as example, please refer to Fig. 3, it shows that first lens 110 also comprises a fixed part, be exemplified as by thing side convex surface and as the extension 113 of side convex surface toward extension at this, be assembled in optical imaging lens 1 for first lens 110, desirable light can not pass through extension 113, and the structure of this fixed part and profile need not be limited to this.
The thing side 141 of the thing side 131 of the thing side 121 of the thing side 111 of first lens 110 and picture side 112, the second lens 120 and picture side 122, the 3rd lens 130 and picture side 132, the 4th lens 140 and picture side 142, and the thing side 151 of the 5th lens 150 and picture side 152, amounting to ten aspheric surfaces is all according to following aspheric curve formula definition:
Wherein:
R represents the radius-of-curvature of lens surface;
Z represents the aspheric degree of depth (being the point of Y apart from optical axis on aspheric surface, itself and the tangent plane that is tangential on summit on the aspheric surface optical axis, vertical range between the two);
Y represents point on non-spherical surface and the vertical range of optical axis;
K is conical surface coefficient (Conic Constant);
a
iBe i rank asphericity coefficients.
Each aspheric parameter detailed data is please in the lump with reference to figure 5.
On the other hand, can find out in the middle of Fig. 2, the optical imaging lens 1 of the present embodiment longitudinal spherical aberration (longitudinal spherical aberration) (a), the astigmatic image error (astigmatism aberration) of the sagitta of arc (sagittal) direction (b), astigmatic image error (c) or the performance (d) of distortion aberration (distortion aberration) of meridian (tangential) direction be all very good.Therefore, by learning in above-mentioned, the optical imaging lens 1 of the present embodiment can be kept favorable optical performance really, and effectively shortens lens length.
Separately please in the lump with reference to figure 6 to Fig. 9, wherein Fig. 6 represents the cross-sectional view according to five chip lens of the optical imaging lens of the second embodiment of the present invention; Fig. 7 represents according to the longitudinal spherical aberration of second embodiment of the present invention optical imaging lens and every aberration diagram schematic diagram; Fig. 8 represents the detailed optical data according to each eyeglass of the optical imaging lens of the second embodiment of the present invention; Fig. 9 represents the aspherical surface data according to the optical imaging lens of the second embodiment of the present invention.Use in the present embodiment and indicate similar assembly to the first similar label of embodiment, the label beginning changes 2 into only as used herein, and for example first lens thing side is 211, and first lens is 212 as the side, and other assembly label does not repeat them here.As shown in Figure 6, the optical imaging lens 2 of the present embodiment is from thing side A1 to sequentially comprising as side A2 an aperture 200, a first lens 210, one second lens 220, one the 3rd lens 230, one the 4th lens 240 and one the 5th lens 250 that are placed between object side and a first lens 210.
The refractive index of the second embodiment and concave-convex surface configuration are all identical with the first embodiment, and only radius-of-curvature, lens thickness and each air gap width are different.About each optical characteristics of each lens of the optical imaging lens 2 of the present embodiment and the thickness of each airspace, please refer to Fig. 8, wherein AAG/CT
5, AGL
23-AGL
45, EFL/ALT, CT
4/ BFL, ALT/BFL and CT
4/ AGL
23Value be respectively:
AAG/CT
5=3.441, really satisfy relational expression (1);
AGL
23-AGL
45=0.050 (mm) satisfies relational expression (2) really;
EFL/ALT=1.936 satisfies relational expression (3), (3') really;
CT
4/ BFL=0.439 satisfies relational expression (4), (4') really;
ALT/BFL=1.408 satisfies relational expression (5), (5') really;
CT
4/ AGL
23=1.778, really satisfy relational expression (6);
Thickness from first lens thing side convex surface 211 to imaging surface 270 is 4.673 (mm), really shortens the lens length of optical imaging lens 2.
On the other hand, can find out in the middle of Fig. 7, the optical imaging lens 2 of the present embodiment is all very good in the performance of the astigmatic image error (b) of longitudinal spherical aberration (a), sagitta of arc direction, the astigmatic image error (c) of meridian direction or the aberration (d) that distorts.Therefore, by learning in above-mentioned, the optical imaging lens 2 of the present embodiment can be kept favorable optical performance really, and effectively shortens lens length.
Separately please in the lump with reference to figures 10 to Figure 13, wherein Figure 10 represents the cross-sectional view according to five chip lens of the optical imaging lens of the third embodiment of the present invention; Figure 11 represents according to the longitudinal spherical aberration of third embodiment of the present invention optical imaging lens and every aberration diagram schematic diagram; Figure 12 represents the detailed optical data according to each eyeglass of the optical imaging lens of the third embodiment of the present invention; Figure 13 represents the aspherical surface data according to the optical imaging lens of the third embodiment of the present invention.Use in the present embodiment and indicate similar assembly to the first similar label of embodiment, the label beginning changes 3 into only as used herein, and for example first lens thing side is 311, and first lens is 312 as the side, and other assembly label does not repeat them here.As shown in Figure 10, the optical imaging lens 3 of the present embodiment is from thing side A1 to sequentially comprising as side A2 an aperture 300, a first lens 310, one second lens 320, one the 3rd lens 330, one the 4th lens 340 and one the 5th lens 350 that are placed between object side and a first lens 310.
The main difference of the 3rd embodiment and the first embodiment be the 3rd embodiment first lens 310 comprise that as side 312 convex surface part 3121 and that is positioned at the optical axis near zone is positioned at the concave surface section 3122 of circumference near zone, and the distance of the center of lens thickness of each eyeglass of the 3rd embodiment and each airspace more or less some is different with the first embodiment.About each optical characteristics of each lens of the optical imaging lens 3 of the present embodiment and the thickness of each airspace, please refer to Figure 12, wherein AAG/CT
5, AGL
23-AGL
45, EFL/ALT, CT
4/ BFL, ALT/BFL and CT
4/ AGL
23Value be respectively:
AAG/CT
5=3.100, really satisfy relational expression (1);
AGL
23-AGL
45=0.320 (mm) satisfies relational expression (2) really;
EFL/ALT=1.994 satisfies relational expression (3), (3') really;
CT
4/ BFL=0.427 satisfies relational expression (4), (4') really;
ALT/BFL=1.423 satisfies relational expression (5), (5') really;
CT
4/ AGL
23=1.132, really satisfy relational expression (6);
Thickness from first lens thing side convex surface 311 to imaging surface 370 is 4.908 (mm), really shortens the lens length of optical imaging lens 3.
On the other hand, can find out in the middle of Figure 11, the optical imaging lens 3 of the present embodiment is all very good in the performance of the astigmatic image error (b) of longitudinal spherical aberration (a), sagitta of arc direction, the astigmatic image error (c) of meridian direction or the aberration (d) that distorts.Therefore, by learning in above-mentioned, the optical imaging lens 3 of the present embodiment can be kept favorable optical performance really, and effectively shortens lens length.
Separately please in the lump with reference to figs. 14 to Figure 17, wherein Figure 14 represents the cross-sectional view according to five chip lens of the optical imaging lens of the fourth embodiment of the present invention; Figure 15 represents according to the longitudinal spherical aberration of fourth embodiment of the present invention optical imaging lens and every aberration diagram schematic diagram; Figure 16 represents the detailed optical data according to each eyeglass of the optical imaging lens of the fourth embodiment of the present invention; Figure 17 represents the aspherical surface data according to the optical imaging lens of the fourth embodiment of the present invention.Use in the present embodiment and indicate similar assembly to the first similar label of embodiment, the label beginning changes 4 into only as used herein, and for example first lens thing side is 411, and first lens is 412 as the side, and other assembly label does not repeat them here.As shown in Figure 14, the optical imaging lens 4 of the present embodiment is from thing side A1 to sequentially comprising as side A2 an aperture 400, a first lens 410, one second lens 420, one the 3rd lens 430, one the 4th lens 440 and one the 5th lens 450 that are placed between object side and a first lens 410.
The refractive index of the 4th embodiment and concave-convex surface configuration are all identical with the 3rd embodiment, and only radius-of-curvature, lens thickness and each air gap width are different.About each optical characteristics of each lens of the optical imaging lens 4 of the present embodiment and the thickness of each airspace, please refer to Figure 16, wherein AAG/CT
5, AGL
23-AGL
45, EFL/ALT, CT
4/ BFL, ALT/BFL and CT
4/ AGL
23Value be respectively:
AAG/CT
5=4.098, really satisfy relational expression (1);
AGL
23-AGL
45=0.182 (mm) satisfies relational expression (2) really;
EFL/ALT=2.054 satisfies relational expression (3), (3') really;
CT
4/ BFL=0.423 satisfies relational expression (4), (4') really;
ALT/BFL=1.338 satisfies relational expression (5), (5') really;
CT
4/ AGL
23=1.351, really satisfy relational expression (6);
Thickness from first lens thing side convex surface 411 to imaging surface 470 is 4.854 (mm), really shortens the lens length of optical imaging lens 4.
On the other hand, can find out in the middle of the 15th figure, the optical imaging lens 4 of the present embodiment is all very good in the performance of the astigmatic image error (b) of longitudinal spherical aberration (a), sagitta of arc direction, the astigmatic image error (c) of meridian direction or the aberration (d) that distorts.Therefore, by learning in above-mentioned, the optical imaging lens 4 of the present embodiment can be kept favorable optical performance really, and effectively shortens lens length.
Separately please in the lump referring to figs. 18 to Figure 21, wherein Figure 18 represents the cross-sectional view according to five chip lens of the optical imaging lens of the fifth embodiment of the present invention; Figure 19 represents according to the longitudinal spherical aberration of fifth embodiment of the present invention optical imaging lens and every aberration diagram schematic diagram; Figure 20 represents the detailed optical data according to each eyeglass of the optical imaging lens of the fifth embodiment of the present invention; Figure 21 represents the aspherical surface data according to the optical imaging lens of the fifth embodiment of the present invention.Use in the present embodiment and indicate similar assembly to the first similar label of embodiment, the label beginning changes 5 into only as used herein, and for example first lens thing side is 511, and first lens is 512 as the side, and other assembly label does not repeat them here.As shown in Figure 18, the optical imaging lens 5 of the present embodiment is from thing side A1 to sequentially comprising as side A2 an aperture 500, a first lens 510, one second lens 520, one the 3rd lens 530, one the 4th lens 540 and one the 5th lens 550 that are placed between object side and a first lens 510.
The refractive index of the 5th embodiment and concave-convex surface configuration are all identical with the 3rd embodiment, and only radius-of-curvature, lens thickness and each air gap width are different.About each optical characteristics of each lens of the optical imaging lens 5 of the present embodiment and the thickness of each airspace, please refer to the 20th figure, wherein AAG/CT
5, AGL
23-AGL
45, EFL/ALT, CT
4/ BFL, ALT/BFL and CT
4/ AGL
23Value be respectively:
AAG/CT
5=4.084, really satisfy relational expression (1);
AGL
23-AGL
45=0.182 (mm) satisfies relational expression (2) really;
EFL/ALT=2.053 satisfies relational expression (3), (3') really;
CT
4/ BFL=0.423 satisfies relational expression (4), (4') really;
ALT/BFL=1.339 satisfies relational expression (5), (5') really;
CT
4/ AGL
23=1.352, really satisfy relational expression (6);
Thickness from first lens thing side convex surface 511 to imaging surface 570 is 4.853 (mm), really shortens the lens length of optical imaging lens 5.
On the other hand, can find out in the middle of Figure 19, the optical imaging lens 5 of the present embodiment is all very good in the performance of the astigmatic image error (b) of longitudinal spherical aberration (a), sagitta of arc direction, the astigmatic image error (c) of meridian direction or the aberration (d) that distorts.Therefore, by learning in above-mentioned, the optical imaging lens 5 of the present embodiment can be kept favorable optical performance really, and effectively shortens lens length.
Separately please in the lump with reference to Figure 22 to Figure 25, wherein Figure 22 represents the cross-sectional view according to five chip lens of the optical imaging lens of the sixth embodiment of the present invention; Figure 23 represents according to the longitudinal spherical aberration of sixth embodiment of the present invention optical imaging lens and every aberration diagram schematic diagram; Figure 24 represents the detailed optical data according to each eyeglass of the optical imaging lens of the sixth embodiment of the present invention; Figure 25 represents the aspherical surface data according to the optical imaging lens of the sixth embodiment of the present invention.Use in the present embodiment and indicate similar assembly to the first similar label of embodiment, the label beginning changes 6 into only as used herein, and for example first lens thing side is 611, and the first lens image planes are 612, and other assembly label does not repeat them here.As shown in Figure 22, the optical imaging lens 6 of the present embodiment is from thing side A1 to sequentially comprising as side A2 an aperture 600, a first lens 610, one second lens 620, one the 3rd lens 630, one the 4th lens 640 and one the 5th lens 650 that are placed between object side and a first lens 610.
The refractive index of the 6th embodiment and concave-convex surface configuration are all identical with the 3rd embodiment, and only radius-of-curvature, lens thickness and each air gap width are different.About each optical characteristics of each lens of the optical imaging lens 6 of the present embodiment and the thickness of each airspace, please refer to Figure 24, wherein AAG/CT
5, AGL
23-AGL
45, EFL/ALT, CT
4/ BFL, ALT/BFL and CT
4/ AGL
23Value be respectively:
AAG/CT
5=3.415, really satisfy relational expression (1);
AGL
23-AGL
45=0.201 (mm) satisfies relational expression (2) really;
EFL/ALT=2.050 satisfies relational expression (3), (3') really;
CT
4/ BFL=0.397 satisfies relational expression (4), (4') really;
ALT/BFL=1.297 satisfies relational expression (5), (5') really;
CT
4/ AGL
23=1.374, really satisfy relational expression (6);
Thickness from first lens thing side convex surface 611 to imaging surface 670 is 4.926 (mm), really shortens the lens length of optical imaging lens 6.
On the other hand, can find out in the middle of Figure 23, the optical imaging lens 6 of the present embodiment is all very good in the performance of the astigmatic image error (b) of longitudinal spherical aberration (a), sagitta of arc direction, the astigmatic image error (c) of meridian direction or the aberration (d) that distorts.Therefore, by learning in above-mentioned, the optical imaging lens 6 of the present embodiment can be kept favorable optical performance really, and effectively shortens lens length.
Separately please refer to AAG/CT of represented above six embodiment of Figure 26
5, AGL
23-AGL
45, EFL/ALT, CT
4/ BFL, ALT/BFL and CT
4/ AGL
23Value can find out that optical imaging lens of the present invention can satisfy aforementioned relational expression (1), (2), (3)/(3'), (4)/(4'), (5)/(5'), (6) really.
See also Figure 27, be one first preferred embodiment of the portable electronic devices 20 of application of aforementioned optical imaging lens, portable electronic devices 20 comprises a casing 21 and and is arranged on image module 22 in casing 21.Be only explanation portable electronic devices 20 as an example of mobile phone example at this, but the pattern of portable electronic devices 20 is not as limit.
As shown in FIG., image module 22 comprises just like front described five chip optical imaging lens, is used for being arranged at the image sensor 171 of five chip optical imaging lens 1 picture sides for the substrate 172 and of this module back seat unit setting for the module back seat unit (module housing unit) 24, that the lens barrel 23, that five chip optical imaging lens 1 arrange is used for arranging for lens barrel 23 as the five chip optical imaging lens 1, of exemplarily selecting aforementioned the first embodiment at this.Imaging surface 170 is to be formed at image sensor 171.
It is noted that, though the present embodiment shows optical filtering part 160, yet also can omit in other embodiments the structure of optical filtering part 160, the necessity with optical filtering part 160 is not limited, and casing 21, lens barrel 23 and/or module back seat unit 24 can be single component or a plurality of assembly assembles need not be defined in this; Secondly; the image sensor 171 that the present embodiment uses is to adopt interconnection system chip package (Chip on Board on plate; COB) packaged type directly is connected on substrate 172; with traditional die size encapsulation (Chip Scale Package; the difference of packaged type CSP) is that on plate, the interconnection system chip package need not use cover glass (cover glass); therefore need to before image sensor 171, cover glass be set in optical imaging lens 1, so the present invention is not as limit.
The five chip lens 110,120,130,140,150 that integral body has refractive index are exemplarily to exist respectively the mode of an airspace to be arranged in lens barrel 23 between relative two lens.
Module back seat unit 24 comprises uses the pedestal 2401 that arranges for lens barrel 23.Lens barrel 23 be with pedestal 2401 along a coaxial setting of axis II', and lens barrel 23 is arranged at pedestal 2401 inboards.
Due to the length of optical imaging lens 1 4.876 (mm) only, therefore can the size design ground of portable electronic devices 20 is more compact, and good optical property and image quality still can be provided.Therefore, the present embodiment can also satisfy compact product design trend and consumption demand except having the economic benefit that reduces casing raw material consumption.
Separately see also Figure 28, be one second preferred embodiment of the portable electronic devices 20' of application of aforementioned optical imaging lens 1, the main difference of the portable electronic devices 20' of the second preferred embodiment and the portable electronic devices 20 of the first preferred embodiment is: pedestal 2401 has a First body unit 2402, one second pedestal unit 2403, a coil 2404 and a magnet assembly 2405.This pedestal 2401 arranges 23 lens barrels except supplying, also can move along the optical axis direction of optical imaging lens 1, thin section is described as follows: First body unit 2402 fit with lens barrel 23 outsides and along an axis II' arrange, the second pedestal unit 2403 is along axis II' and around First body unit 2402 arranged outside.Coil 2404 is arranged between First body unit 2402 outsides and 2403 inboards, the second pedestal unit.Magnet assembly 2405 is arranged between coil 2404 outsides and 2403 inboards, the second pedestal unit.
Similarly, due to the length of optical imaging lens 1 4.876 (mm) only, therefore can the size design ground of portable electronic devices 20' is more compact, and good optical property and image quality still can be provided.Therefore, the present embodiment can also satisfy compact product design trend and consumption demand except having the economic benefit that reduces casing raw material consumption.
By learning in above-mentioned, portable electronic devices of the present invention and its optical imaging lens, by control at least one center of lens thickness to all between five lens along the ratio of the summation of the airspace on optical axis in a preset range, and merge the thin section structure of each lens and/or the design of optical activity in the wrong, keeping favorable optical performance, and effectively shorten lens length.
Although specifically show and introduced the present invention in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present invention that appended claims limits; can make a variety of changes the present invention in the form and details, be protection scope of the present invention.
Claims (20)
1. optical imaging lens, from the thing side to sequentially comprising as side:
One aperture;
One has the first lens of positive refractive index, comprises one towards the thing side of thing side, and this thing side is a convex surface;
One has the second lens of negative refractive index;
One has the 3rd lens of negative refractive index;
One the 4th lens; And
One the 5th lens comprise one towards the thing side of thing side and one towards the picture side of picture side, and this thing side comprises that one is positioned at the concave surface section of optical axis near zone, and should comprise that one was positioned at the convex surface part of circumference near zone as the side;
Wherein, the eyeglass of integral body with refractive index only only has five lens.
2. optical imaging lens as claimed in claim 1 is characterized in that: four clearances sum totals between this first lens and the 5th lens on optical axis are AAG, and the center thickness of the 5th lens on optical axis is CT
5, satisfy following relational expression:
AAG/CT
5?≥?3.0。
3. optical imaging lens claimed in claim 2, it is characterized in that: the clearance between these second lens and the 3rd lens on optical axis is AGL
23, the clearance between the 4th lens and the 5th lens on optical axis is AGL
45, satisfy following relational expression:
0?≤?AGL
23?-?AGL
45?≤?0.4?mm。
4. optical imaging lens claimed in claim 2, it is characterized in that: the 4th lens comprise one day to the thing side of thing side, this thing side comprises that one is positioned at the concave surface section of circumference near zone.
5. optical imaging lens claimed in claim 4, it is characterized in that: the center thickness of the 4th lens on optical axis is CT
4, the clearance between these second lens and the 3rd lens on optical axis is AGL
23, this CT
4With AGL
23Satisfy following relational expression:
CT
4?/?AGL
23?≤?3.0。
6. optical imaging lens claimed in claim 2 is characterized in that: the effective focal length of this optical imaging lens (Effective focal length) is EFL, and the thickness summation of these five lens on optical axis is ALT, and this EFL and ALT satisfy following relational expression:
EFL?/?ALT?≥?1.8。
7. optical imaging lens claimed in claim 6, it is characterized in that: the center thickness of the 4th lens on optical axis is CT
4, the clearance between these second lens and the 3rd lens on optical axis is AGL
23, this CT
4With AGL
23Satisfy following relational expression:
CT
4?/?AGL
23?≤?3.0。
8. optical imaging lens claimed in claim 2, it is characterized in that: the center thickness of the 4th lens on optical axis is CT
4, the back focal length of this optical imaging lens (Back focal length) is BFL, this CT
4Satisfy following relational expression with BFL:
CT
4?/?BFL?≤?0.7。
9. optical imaging lens claimed in claim 8, is characterized in that: this CT
4More satisfy following relational expression with BFL:
CT
4?/?BFL?≤?0.5。
10. optical imaging lens claimed in claim 2, it is characterized in that: the thickness summation of these five lens on optical axis is ALT, and the back focal length of this optical imaging lens is BFL, and this ALT and BFL satisfy following relational expression:
ALT?/?BFL?≤?2.0。
11. optical imaging lens claimed in claim 10 is characterized in that: this ALT and BFL more satisfy following relational expression:
ALT?/?BFL?≤?1.5。
12. optical imaging lens claimed in claim 1 is characterized in that: the clearance between these second lens and the 3rd lens on optical axis is AGL
23, the clearance between the 4th lens and the 5th lens on optical axis is AGL
45, satisfy following relational expression:
0?≤?AGL
23?-?AGL
45?≤?0.4?mm。
13. the described optical imaging lens of claim 12, it is characterized in that: these second lens comprise that one day is to the thing side of thing side, this thing side comprises that one is positioned at the convex surface part of circumference near zone, and the effective focal length of this optical imaging lens is EFL, the thickness summation of these five lens on optical axis is ALT, and this EFL and ALT satisfy following relational expression:
EFL?/?ALT?≥?1.9。
14. optical imaging lens claimed in claim 1 is characterized in that: the 4th lens comprise one day to the thing side of thing side, and this thing side comprises that one is positioned at the concave surface section of circumference near zone.
15. the described optical imaging lens of claim 14 is characterized in that: these second lens comprise one day to the thing side of thing side, and this thing side comprises that one is positioned at the convex surface part of circumference near zone.
16. the described optical imaging lens of claim 15 is characterized in that: the center thickness of the 4th lens on optical axis is CT
4, the clearance between these second lens and the 3rd lens on optical axis is AGL
23, this CT
4With AGL
23Satisfy following relational expression:
CT
4?/?AGL
23?≤?3.0。
17. optical imaging lens claimed in claim 1 is characterized in that: these second lens comprise one day to the thing side of thing side, and this thing side comprises that one is positioned at the convex surface part of circumference near zone.
18. the described optical imaging lens of claim 17 is characterized in that: the effective focal length of this optical imaging lens is EFL, and the thickness summation of these five lens on optical axis is ALT, and this EFL and ALT satisfy following relational expression:
EFL/ALT 〉=1.8; And
The center thickness of the 4th lens on optical axis is CT
4, the clearance between these second lens and the 3rd lens on optical axis is AGL
23, this CT
4With AGL
23Satisfy following relational expression:
CT
4?/?AGL
23?≤?3.0。
19. an electronic installation comprises:
One casing; And
One image module is installed in this casing, comprising:
Just like the described optical imaging lens of any one in 1 to 18 of the claims;
One lens barrel arranges this optical imaging lens with supply;
One module back seat unit arranges this lens barrel with supply;
One substrate arranges this module back seat unit with supply; And
One image sensor is arranged at this substrate and is positioned at the picture side of this optical imaging lens.
20. electronic installation as claimed in claim 19 is characterized in that: this module back seat unit comprises a pedestal, this lens barrel is set and can moves along the optical axis direction of this optical imaging lens with supply.
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|---|---|---|---|
| CN201210432355.9A CN103135205B (en) | 2012-11-02 | 2012-11-02 | Portable electronic device and optical imaging lens thereof |
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