CN105445899A - Optical imaging camera shot and electronic device using same - Google Patents
Optical imaging camera shot and electronic device using same Download PDFInfo
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- CN105445899A CN105445899A CN201410427242.9A CN201410427242A CN105445899A CN 105445899 A CN105445899 A CN 105445899A CN 201410427242 A CN201410427242 A CN 201410427242A CN 105445899 A CN105445899 A CN 105445899A
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Abstract
The invention relates to an optical imaging camera shot and an electronic device using the same. The optical imaging camera shot comprises five lenses sequentially from an object side to an image side along an optical axis. The image side of the first lens has a convex surface part in the area near the circumference; the object side of the second lens has a concave surface part in the area near the circumference; the image side of the second lens has a concave surface part in the area near the optical axis and a convex surface part in the area near the circumference; the object side of the third lens has a concave surface part in the area near the circumference; the fourth lens has positive refractive index, and the object side of the fourth lens has a convex surface part in the area near the optical axis; and the object side of the fifth lens has a convex surface part in the area near the optical axis, and meets the expressions T5/G23>=1.1 and G45>G34. The electronic device comprises a case and an image module, and the image module comprises the optical imaging camera shot, a lens cone, a module holder unit and an image sensor.
Description
Technical field
The invention relates to a kind of optical lens, refer to a kind of optical imaging lens especially and apply the electronic installation of this optical imaging lens.
Background technology
In recent years, the universal image module correlation technique that makes of the portable electronic product such as mobile phone and digital camera is flourish, this image module mainly comprises optical imaging lens, the assemblies such as module rear seat unit (moduleholderunit) and sensor (sensor), and the slim light and handyization trend of mobile phone and digital camera also allows the miniature requirement of image module more and more high, along with photosensitive coupling component (ChargeCoupledDevice, referred to as CCD) or Complimentary Metal-Oxide semiconductor subassembly (ComplementaryMetal-OxideSemiconductor, referred to as CMOS) technical progress and result of scaling, the optical lens be loaded in image module also needs correspondingly to shorten length, but in order to avoid photographic effects and Quality Down, still good optical property will be taken into account when shortening the length of optical lens.But the most important characteristic of optical lens is nothing more than being exactly image quality and volume.
U.S. Patent Bulletin numbers 8760775 and U.S. Patent Publication No. 20140078600 Patent Case all disclose a kind of optical lens be made up of five lens, but, the system length of these optical lens all effectively cannot be contracted to certain length, to meet the design requirement of mobile phone slimming.
In sum, the technical difficulty of microminiaturized camera lens obviously exceeds conventional lenses, therefore how to produce the optical lens meeting consumption electronic products demand, and continue to promote its image quality, be this area product for a long time always, target that official, educational circles are earnestly pursued.
Summary of the invention
Therefore, the object of the present invention, namely providing under a kind of condition shortening lens system length, still can possess the optical imaging lens of good optical property.
So optical imaging lens of the present invention, an aperture, one first lens, one second lens, one the 3rd lens, one the 4th lens are sequentially comprised from thing side to image side along an optical axis, and one the 5th lens, and these first lens all have refractive index to the 5th lens, and comprise respectively one towards thing side and the thing side and that imaging light is passed through towards image side and the face, image side making imaging light pass through.
The convex surface part that this image side masks of this first lens has one to be positioned at circumference near zone; This thing side of these the second lens has the concave part that is positioned at circumference near zone, and this image side mask of these the second lens has a concave part and being positioned at optical axis near zone to be positioned at the convex surface part of circumference near zone; This thing side of 3rd lens has the concave part that is positioned at circumference near zone; 4th lens have positive refractive index, and this thing side of the 4th lens has the concave part that is positioned at optical axis near zone; This thing side of 5th lens has the convex surface part that is positioned at optical axis near zone.
Wherein, this optical imaging lens meets T5/G23≤1.1 and G45>G34, G23 is the clearance between these second lens and the 3rd lens on optical axis, G34 is the clearance between the 3rd lens and the 4th lens on optical axis, G45 is the clearance between the 4th lens and the 5th lens on optical axis, and T5 is the thickness of the 5th lens on optical axis.
The beneficial effect of optical imaging lens of the present invention is: the thing side of above lens or the concaveconvex shape in face, image side design and arrangement, make this optical imaging lens under the condition shortening system length, still possess the optical property that effectively can overcome aberration, and preferably image quality is provided.
Therefore, another object of the present invention, is namely providing a kind of electronic installation being applied to aforesaid optical imaging lens.
So electronic installation of the present invention, comprises a casing, and one is arranged on image module in this casing.
This image module comprises just like lens barrel, the module rear seat unit for for this lens barrel arrange of aforementioned described optical imaging lens, for arranging for this optical imaging lens, and the image sensor that is arranged at this optical imaging lens image side.
The beneficial effect of electronic installation of the present invention is: by loading the image module with aforesaid optical imaging lens in this electronic installation, in order to this imaging lens under the condition shortening system length, the advantage of good optical property still can be provided, more slim light and handy electronic installation is made when not sacrificing optical property, make the present invention have good Practical Performance concurrently and contribute to the structural design of compactization, and higher-quality consumption demand can be met.
Accompanying drawing explanation
Fig. 1 is a schematic diagram, and a lens arrangement is described;
Fig. 2 is a configuration schematic diagram, and one first embodiment of optical imaging lens of the present invention is described;
Fig. 3 is the longitudinal spherical aberration of this first embodiment and every aberration diagram;
Fig. 4 is a tabular drawing, and the optical data of each lens of this first embodiment is described;
Fig. 5 is a tabular drawing, and the asphericity coefficient of each lens of this first embodiment is described;
Fig. 6 is a configuration schematic diagram, and one second embodiment of optical imaging lens of the present invention is described;
Fig. 7 is the longitudinal spherical aberration of this second embodiment and every aberration diagram;
Fig. 8 is a tabular drawing, and the optical data of each lens of this second embodiment is described;
Fig. 9 is a tabular drawing, and the asphericity coefficient of each lens of this second embodiment is described;
Figure 10 is a configuration schematic diagram, and one the 3rd embodiment of optical imaging lens of the present invention is described;
Figure 11 is the longitudinal spherical aberration of the 3rd embodiment and every aberration diagram;
Figure 12 is a tabular drawing, and the optical data of each lens of the 3rd embodiment is described;
Figure 13 is a tabular drawing, and the asphericity coefficient of each lens of the 3rd embodiment is described;
Figure 14 is a configuration schematic diagram, and one the 4th embodiment of optical imaging lens of the present invention is described;
Figure 15 is the longitudinal spherical aberration of the 4th embodiment and every aberration diagram;
Figure 16 is a tabular drawing, and the optical data of each lens of the 4th embodiment is described;
Figure 17 is a tabular drawing, and the asphericity coefficient of each lens of the 4th embodiment is described;
Figure 18 is a configuration schematic diagram, and one the 5th embodiment of optical imaging lens of the present invention is described;
Figure 19 is the longitudinal spherical aberration of the 5th embodiment and every aberration diagram;
Figure 20 is a tabular drawing, and the optical data of each lens of the 5th embodiment is described;
Figure 21 is a tabular drawing, and the asphericity coefficient of each lens of the 5th embodiment is described;
Figure 22 is a tabular drawing, and the optical parametric of this first embodiment to the 5th embodiment of this five chips optical imaging lens is described;
Figure 23 is a cross-sectional schematic, and one first embodiment of electronic installation of the present invention is described; And
Figure 24 is a cross-sectional schematic, and one second embodiment of electronic installation of the present invention is described.
[symbol description]
10 optical imaging lens
2 apertures
3 first lens
31 thing sides
311 convex surface part
312 convex surface part
32 face, image sides
321 concave part
322 convex surface part
4 second lens
41 thing sides
411 convex surface part
412 concave part
413 concave part
42 face, image sides
421 concave part
422 convex surface part
5 the 3rd lens
51 thing sides
511 convex surface part
512 concave part
52 face, image sides
521 concave part
522 convex surface part
523 concave part
6 the 4th lens
61 thing sides
611 concave part
612 convex surface part
613 concave part
62 face, image sides
621 convex surface part
622 convex surface part
7 the 5th lens
71 thing sides
711 convex surface part
712 concave part
72 face, image sides
721 concave part
722 convex surface part
8 optical filters
81 thing sides
82 face, image sides
100 imaging surfaces
I optical axis
1 electronic installation
11 casings
12 image modules
120 module rear seat unit
121 camera lens back seats
122 image sensor back seats
123 first pedestals
124 second pedestals
125 coils
126 magnet assemblies
130 image sensors
21 lens barrels
II, III axis
Embodiment
Before the present invention is described in detail, should be noted that in the following description content, similar assembly represents with identical numbering.
This section of instructions is sayed it " lens have positive refractive index (or negative refractive index) ", refers to that described lens have positive refractive index (or negative refractive index) at optical axis near zone." the thing side (or face, image side) of lens has the convex surface part (or concave part) being positioned at certain region ", refer to that this region is close to the exterior lateral area in this region in radial direction, towards being parallel to the direction of optical axis more " outwardly convex " (or " caving inward "), for Fig. 1, wherein I is optical axis and these lens are for axis of symmetry is radially symmetrical with this optical axis I, the thing side of these lens has convex surface part in a-quadrant, B region has concave part and C region has convex surface part, reason is that a-quadrant is close to the exterior lateral area (i.e. B region) in this region in radial direction, towards the direction more outwardly convex being parallel to optical axis, B region then more caves inward compared to C region, and C region compared to E region also more outwardly convex in like manner." circumference near zone ", refer to the circumference near zone being positioned at the curved surface that lens only supply imaging light to pass through, that is the C region in figure, wherein, imaging light includes chief ray (chiefray) Lc and marginal ray (marginalray) Lm." optical axis near zone " refers to the optical axis near zone of this curved surface only supplying imaging light to pass through, that is the a-quadrant in Fig. 1.In addition, these lens also comprise an extension E, are loaded in an optical imaging lens with for this lens combination, and desirable imaging light can't pass through this extension E, but structure and the shape of this extension E are not limited to this, embodiment is below ask the graphic extension succinctly all eliminating part.
Consult Fig. 2 and Fig. 4, one of optical imaging lens 10 of the present invention first embodiment, aperture 2,1 first lens 3,1 second lens 4, the 3rd lens 5, the 4th lens 6, the 5th lens 7 are sequentially comprised from thing side to image side along an optical axis I, and an optical filter 8.When the light sent by a thing to be captured enters this optical imaging lens 10, and via this aperture 2, these first lens 3, these second lens 4, the 3rd lens 5, the 4th lens 6, the 5th lens 7, and after this optical filter 8, an image can be formed at an imaging surface 100 (ImagePlane).This optical filter 8 is infrared filter (IRCutFilter), affects image quality for preventing the infrared transmitting in light to this imaging surface 100.Supplementary notes, thing side is towards the side of this thing to be captured, and image side is towards the side of this imaging surface 100.
Wherein, these first lens 3, these second lens 4, the 3rd lens 5, the 4th lens 6, the 5th lens 7, and this optical filter 8 has one all respectively towards thing side and the thing side 31,41,51,61,71,81 making imaging light pass through, and one towards image side and the face, image side 32,42,52,62,72,82 making imaging light pass through.Wherein, these thing sides 31,41,51,61,71 and these faces, image side 32,42,52,62,72 are all aspheric surface.
In addition, in order to meet the light-weighted demand of product, these first lens 3 to the 5th lens 7 are all to be possessed refractive index and is all made by plastic material, but these first lens 3 to the material of the 5th lens 7 still not as restriction.
These first lens 3 have positive refractive index.This thing side 31 of these the first lens 3 is a convex surface, and there is the convex surface part 312 that a convex surface part 311 and being positioned at optical axis I near zone is positioned at circumference near zone, this faces, image side 32 of this first lens 3 has the convex surface part 322 that a concave part 321 and being positioned at optical axis I near zone is positioned at circumference near zone.
These second lens 4 have negative refractive index.This thing sides 41 of this second lens 4 has the concave part 412 that a convex surface part 411 and being positioned at optical axis I near zone is positioned at circumference near zone, and this faces, image side 42 of this second lens 4 has one to be positioned at circumference near zone convex surface part 422 in the concave part 421 and of optical axis I near zone.
3rd lens 5 have negative refractive index, this thing sides 51 of 3rd lens 5 has one and is positioned at the convex surface part 511 of optical axis I near zone and this image side mask being positioned at concave part the 512, three lens 5 of circumference near zone and has a concave part 521 and being positioned at optical axis I near zone to be positioned at the convex surface part 522 of circumference near zone.
4th lens 6 have positive refractive index.This thing sides 61 of 4th lens 6 has the convex surface part 612 that a concave part 611 and being positioned at optical axis I near zone is positioned at circumference near zone, this face, image side 62 of 4th lens 6 is a convex surface, and has the convex surface part 622 that a convex surface part 621 and being positioned at optical axis I near zone is positioned at circumference near zone.
5th lens 7 have negative refractive index.This thing side 71 of 5th lens 7 has the convex surface part 711 that is positioned at optical axis I near zone, and one this face, image side 72 being positioned at concave part the 712, five lens 7 of circumference near zone there is the convex surface part 722 that a concave part 721 and being positioned at optical axis near zone is positioned at circumference near zone.
In the present first embodiment, said lens is only had to have refractive index.
Other detailed optical data of this first embodiment as shown in Figure 4, and the total system focal length (effectivefocallength of this first embodiment, be called for short EFL) be 2.632mm, half angle of view (halffieldofview, be called for short HFOV) be 39.882 °, f-number (Fno) is 2.050, its system length is 3.648mm.Wherein, this system length refers to by this thing side 31 of these the first lens 3 to the distance this imaging surface 100 is on optical axis I.
In addition, from the first lens 3, these second lens 4, the 3rd lens 5, the 4th lens 6, and the 5th lens 7 thing side 31,41,51,61,71 and face, image side 32,42,52,62,72, amounting to ten faces is all aspheric surfaces, and this aspheric surface is according to the definition of following formula:
Wherein:
Y: the point in aspheric curve and the distance of optical axis I;
Z: the degree of depth of aspheric surface (in aspheric surface, distance optical axis I is the point of Y, with the tangent plane being tangential on summit on aspheric surface optical axis I, and vertical range between the two);
R: the radius-of-curvature of lens surface;
K: conical surface coefficient (conicconstant);
A
2i: 2i rank asphericity coefficient.
The face, image side 72 of thing side 31 to the five lens 7 of these the first lens 3 every asphericity coefficient in formula (1) as shown in Figure 5.Wherein, in Fig. 5, field number 31 represents that it is the asphericity coefficient of the thing side 31 of the first lens 3, and the rest may be inferred for other field.
In addition, the relation in the optical imaging lens 10 of this first embodiment between each important parameter as shown in figure 22.
Wherein,
T1 is the thickness of these the first lens 3 on optical axis I;
T2 is the thickness of these the second lens 4 on optical axis I;
T3 is the thickness of the 3rd lens 5 on optical axis I;
T4 is the thickness of the 4th lens 6 on optical axis I;
T5 is the thickness of the 5th lens 7 on optical axis I;
G12 is the clearance between these first lens 3 and this second lens 4 on optical axis I;
G23 is the clearance between these second lens 4 and the 3rd lens 5 on optical axis I;
G34 is the clearance between the 3rd lens 5 and the 4th lens 6 on optical axis I;
G45 is the clearance between the 4th lens 6 and the 5th lens 7 on optical axis I;
Gaa is these first lens 3 to four the clearance summations of the 5th lens 7 on optical axis I, i.e. G12, G23, G34, G45 sum;
ALT is these first lens 3, these second lens 4, the 3rd lens 5, the 4th lens 6 and the thickness summation of the 5th lens 7 on optical axis I, i.e. T1, T2, T3, T4, T5 sum;
TTL is that this thing side 31 of these the first lens 3 is to the distance of this imaging surface 100 on optical axis I;
BFL is that this face, image side 72 of the 5th lens 7 is to the distance of this imaging surface 100 on optical axis I; And
EFL is the system focal length of this optical imaging lens 10.
In addition, then define:
G5F is the clearance between the 5th lens 7 and this optical filter 8 on optical axis I;
TF is the thickness of this optical filter 8 on optical axis I;
GFP is the clearance between this optical filter 8 and this imaging surface 100 on optical axis I;
F1 is the focal length of these the first lens 3;
F2 is the focal length of these the second lens 4;
F3 is the focal length of the 3rd lens 5;
F4 is the focal length of the 4th lens 6;
F5 is the focal length of the 5th lens 7;
N1 is the refractive index of these the first lens 3;
N2 is the refractive index of these the second lens 4;
N3 is the refractive index of the 3rd lens 5;
N4 is the refractive index of the 4th lens 6;
N5 is the refractive index of the 5th lens 7;
υ 1 is the Abbe number of these the first lens 3;
υ 2 is the Abbe number of these the second lens 4;
υ 3 is the Abbe number of the 3rd lens 5;
υ 4 is the Abbe number of the 4th lens 6; And
υ 5 is the Abbe number of the 5th lens 7.
Coordinate again and consult Fig. 3, the longitudinal spherical aberration (longitudinalsphericalaberration) of this first embodiment of graphic explanation of (a), b () is graphic with (c's), this first embodiment astigmatic image error (astigmatismaberration) about the sagitta of arc (sagittal) direction on imaging surface 100 is described respectively, and the astigmatic image error in meridian (tangential) direction, (d's) is graphic, and the distortion aberration (distortionaberration) of this first embodiment on imaging surface 100 is described.In the longitudinal spherical aberration pictorial image 3 (a) of this first embodiment, curve formed by each wavelength all very close to and close to centre, illustrate that the Off-axis-light of each wavelength differing heights all concentrates near imaging point, can be found out by the skewness magnitude level of the curve of each wavelength, the imaging point deviation of the Off-axis-light of differing heights controls within the scope of ± 0.06mm, therefore the present embodiment obviously improves the spherical aberration of phase co-wavelength really, in addition, three kinds to represent wavelength distance to each other also quite close, the image space representing different wave length light is quite concentrated, thus chromatic aberation is made also to obtain obvious improvement.
In two astigmatic image errors of Fig. 3 (b) and 3 (c) illustrates, three kinds represent the focal length variations amount of wavelength in whole field range and drop on ± 0.5mm in, illustrate that the optical system of first embodiment effectively can eliminate aberration.The distortion aberration of Fig. 3 (d) is graphic, the distortion aberration of this first embodiment of display maintains ± scope of 2.5% in, illustrate that the distortion aberration of this first embodiment has met the image quality requirement of optical system, illustrate that this first embodiment is compared to existing optical lens accordingly, foreshortened to the condition of 4mm in system length under, still can provide preferably image quality, therefore this first embodiment can under the condition maintaining favorable optical performance, shorten lens length and expand shooting angle, to realize the product design of slimming more.
Consult Fig. 6, for one second embodiment of optical imaging lens 10 of the present invention, it is roughly similar to this first embodiment, more or less some is different for parameter only between each optical data, asphericity coefficient and these lens 3,4,5,6,7, and this face, image side 52 of the 3rd lens 5 is a concave surface and the concave part 521 and with an optical axis I near zone is positioned at the concave part 523 of circumference near zone.At this it is noted that in order to clearly illustrate drawing, the concave part that in Fig. 6, clipped is identical with the first embodiment and the label of convex surface part.
As shown in Figure 8, and the total system focal length of this second embodiment is 2.641mm to its detailed optical data, and half angle of view (HFOV) is 39.935 °, f-number (Fno) is 2.050, and system length is then 3.646mm.
As shown in Figure 9, be then the every asphericity coefficient of face, image side 72 in formula (1) of thing side 31 to the five lens 7 of these the first lens 3 of this second embodiment.
In addition, the relation in this optical imaging lens 10 of this second embodiment between each important parameter as shown in figure 22.
Coordinate and consult Fig. 7, by the astigmatic image error of the longitudinal spherical aberration of (a), (b), (c), and the distortion aberration of (d) is graphic finds out that this second embodiment also can maintain favorable optical performance.
Can learn via above-mentioned explanation, this second embodiment is compared to the advantage of this first embodiment: the lens length of this second embodiment is less than the lens length of the first embodiment, the angle of half field-of view of this second embodiment is greater than the angle of half field-of view of this first embodiment, the image quality of this second embodiment is also better than the image quality of this first embodiment, and therefore this second embodiment is easy to manufacture than this first embodiment, and yield is higher.
Consult Figure 10, for one the 3rd embodiment of optical imaging lens 10 of the present invention, it is roughly similar to this first embodiment, more or less some is different for parameter only between each optical data, asphericity coefficient and these lens 3,4,5,6,7, and this face, image side 52 of the 3rd lens 5 is a concave surface and the concave part 521 and with an optical axis I near zone is positioned at the concave part 523 of circumference near zone.At this it is noted that in order to clearly illustrate drawing, the concave part that in Figure 10, clipped is identical with the first embodiment and the label of convex surface part.
As shown in figure 12, and the total system focal length of this 3rd embodiment is 2.950mm to its detailed optical data, and half angle of view (HFOV) is 37.032 °, f-number (Fno) is 2.050, and system length is then 3.800mm.
As shown in figure 13, be then the every asphericity coefficient of face, image side 72 in formula (1) of thing side 31 to the five lens 7 of these the first lens 3 of the 3rd embodiment.
In addition, the relation in this optical imaging lens 10 of the 3rd embodiment between each important parameter as shown in figure 22.
Coordinate and consult Figure 11, by the astigmatic image error of the longitudinal spherical aberration of (a), (b), (c), and the distortion aberration of (d) is graphic finds out that this 3rd embodiment also can maintain favorable optical performance.
Can learn via above-mentioned explanation, 3rd embodiment is compared to the advantage of this first embodiment: the image quality of the 3rd embodiment is also better than the image quality of this first embodiment, and therefore the 3rd embodiment is easy to manufacture than this first embodiment, and yield is higher.
Consult Figure 14, for one the 4th embodiment of optical imaging lens 10 of the present invention, it is roughly similar to this first embodiment, only each optical data, asphericity coefficient and these lens 3, 4, 5, 6, parameter between 7 is some difference more or less, and this thing side 41 of these the second lens 4 is a concave surface and has the concave part 412 that a concave part 413 and being positioned at optical axis I near zone is positioned at circumference near zone, 3rd lens 5 have positive refractive index, this thing side 61 of 4th lens 6 is a concave surface, and there is the concave part 613 that a concave part 611 and being positioned at optical axis I near zone is positioned at circumference near zone.At this it is noted that in order to clearly illustrate drawing, the concave part that in Figure 14, clipped is identical with the first embodiment and the label of convex surface part.
As shown in figure 16, and the total system focal length of this 4th embodiment is 2.654mm to its detailed optical data, and half angle of view (HFOV) is 40.145 °, f-number (Fno) is 2.050, and system length is then 3.679mm.
As shown in figure 17, be then the every asphericity coefficient of face, image side 72 in formula (1) of thing side 31 to the five lens 7 of these the first lens 3 of the 4th embodiment.
In addition, the relation in this optical imaging lens 10 of the 4th embodiment between each important parameter as shown in figure 22.
Coordinate and consult Figure 15, by the astigmatic image error of the longitudinal spherical aberration of (a), (b), (c), and the distortion aberration of (d) is graphic finds out that this 4th embodiment also can maintain favorable optical performance.
Can learn via above-mentioned explanation, 4th embodiment is compared to the advantage of this first embodiment: the angle of half field-of view of the 4th embodiment is greater than the angle of half field-of view of this first embodiment, the image quality of the 4th embodiment is also better than the image quality of this first embodiment, and therefore the 4th embodiment is easy to manufacture than this first embodiment, and yield is higher.
Consult Figure 18, for one the 5th embodiment of optical imaging lens 10 of the present invention, it is roughly similar to this first embodiment, only each optical data, asphericity coefficient and these lens 3, 4, 5, 6, parameter between 7 is some difference more or less, and this thing side 41 of these the second lens 4 is a concave surface and has the concave part 412 that a concave part 413 and being positioned at optical axis I near zone is positioned at circumference near zone, 3rd lens 5 have positive refractive index, this face, image side 52 of 3rd lens 5 is a concave surface and has the concave part 523 that a concave part 521 and being positioned at optical axis I near zone is positioned at circumference near zone, this thing side 61 of 4th lens 6 is a concave surface, and there is the concave part 613 that a concave part 611 and being positioned at optical axis I near zone is positioned at circumference near zone.At this it is noted that in order to clearly illustrate drawing, the concave part that in Figure 18, clipped is identical with the first embodiment and the label of convex surface part.
As shown in figure 20, and the total system focal length of this 5th embodiment is 2.815mm to its detailed optical data, and half angle of view (HFOV) is 38.160 °, f-number (Fno) is 2.050, and system length is then 3.800mm.
As shown in figure 21, be then the every asphericity coefficient of face, image side 72 in formula (1) of thing side 31 to the five lens 7 of these the first lens 3 of the 5th embodiment.
In addition, the relation in this optical imaging lens 10 of the 5th embodiment between each important parameter as shown in figure 22.
Coordinate and consult Figure 19, by the astigmatic image error of the longitudinal spherical aberration of (a), (b), (c), and the distortion aberration of (d) is graphic finds out that this 5th embodiment also can maintain favorable optical performance.
Can learn via above-mentioned explanation, 5th embodiment is compared to the advantage of this first embodiment: the image quality of the 5th embodiment is also better than the image quality of this first embodiment, and therefore the 5th embodiment is easy to manufacture than this first embodiment, and yield is higher.
Coordinate again and consult Figure 22, for the tabular drawing of every optical parametric of above-mentioned five embodiments, when relational expression when between the every optical parametric in optical imaging lens 10 of the present invention meets following condition formulae, when system length shortens, still preferably optical property performance is had, when making the present invention be applied to relevant portable electronic devices, the product of slimming more can be made:
(1) T5/G23≤1.1, T5/G34≤1.9, T5/T3≤1.3, wherein, the optics effective diameter of the 5th lens 7 is larger, consider the technology that eyeglass makes, the thickness T5 thinning of the 5th lens 7 has a limit, in addition, G23, G34 and T3 reduce the design being conducive to this optical imaging lens 10 thinning, make T5/G23, T5/G34 and T5/T3 should become large.But while reducing lens thickness and clearance, a suitable ratio should be maintained, to avoid the slimming of a certain numerical value this optical imaging lens 10 entirety excessive and unfavorable, or avoid the too small and unfavorable assembling of arbitrary numerical value, preferably, 1.1≤T5/G23≤8.5,1.9≤T5/G34≤2.9,1.3≤T5/T3≤1.8.
(2) T4/T2≤2.9, T4/T3≤2.5, T4/ (T3+T2)≤1.2, wherein, 4th lens 6 have positive refractive index and its thing side 61 has one is positioned at concave part 611 near optical axis I, therefore the thinning of the 4th lens 6 has a limit, in addition, T2 and T3 reduces the design being conducive to this optical imaging lens 10 thinning, makes T4/T2, T4/T3 and T4/ (T3+T2) should become large.But while reducing lens thickness and clearance, a suitable ratio should be maintained, to avoid the slimming of a certain numerical value this optical imaging lens 10 entirety excessive and unfavorable, or avoid the too small and unfavorable assembling of arbitrary numerical value, preferably, 2.9≤T4/T2≤3.3,2.5≤T4/T3≤3.3,1.2≤T4/ (T3+T2)≤1.8.
(3) EFL/T3≤9, EFL/T5≤7.8, under these conditions, the image quality of this optical imaging lens 10 and yield can be taken into account, but while reduction lens thickness, a suitable ratio should be maintained, to avoid the slimming of a certain numerical value this optical imaging lens 10 entirety excessive and unfavorable, or avoid the too small and unfavorable assembling of arbitrary numerical value, preferably, 9≤EFL/T3≤14,7.8≤EFL/T5≤10.2.
(4) T1/T5≤1.3, all should maintain suitable ratio between these numerical value, cause this optical imaging lens 10 long to avoid arbitrary lens blocked up, or arbitrary lens are crossed thin and are difficult to manufacture, preferably, and 1.3≤T1/T5≤2.1.
(5) G45/ (G12+G34)≤1.2, ALT/G23≤6.8, ALT/T3≤7, Gaa/T3≤2.3, Gaa/T5≤2.2, suitable ratio all should be maintained between these numerical value, avoid arbitrary parameter excessive and be unfavorable for the slimming of this optical imaging lens 10 entirety, or keep away the too small and impact assembling of arbitrary parameter or improve and manufacture upper degree of difficulty, preferably, 1.2≤G45/ (G12+G34)≤1.8,6.8≤ALT/G23≤39.8,7≤ALT/T3≤9.2,2.3≤Gaa/T3≤4.3,2.2≤Gaa/T5≤2.9.
But, because the unpredictability of Optical System Design, under framework of the present invention, meet that above-mentioned conditional preferably can make the contraction in length of optical imaging lens 10 of the present invention, f-number reduces, field angle increases, image quality promotes, or assembling Yield lmproved and improve the shortcoming of prior art.
Conclude above-mentioned, optical imaging lens 10 of the present invention, can obtain following effect and advantage, therefore can reach object of the present invention:
One, 4th lens 6 have positive refractive index, thus provide the part needed for lens set positive refractive index, contribute to the length shortening this optical imaging lens 10, and the convex surface part 322 of this face, image side 32 circumference near zone by these the first lens 3, the concave part 412 of this thing side 41 circumference near zone of these the second lens 4, the concave part 421 of this face, image side 42 optical axis I near zone of these the second lens 4 and the convex surface part 422 of circumference near zone, the concave part 512 of this thing side 51 circumference near zone of the 3rd lens 5, the concave part 611 of this thing side 61 optical axis I near zone of the 4th lens 6, and the 5th convex surface part 711 of this thing side 71 optical axis I near zone of lens 7, mutual collocation promotes the image quality of this optical imaging lens 10.
Two, the present invention is by the control of relevant design parameter, whole system is had and preferably eliminates aberration ability, such as eliminate the ability of spherical aberration, coordinate concaveconvex shape design and the arrangement in these lens 3,4,5,6,7 thing sides 31,41,51,61,71 or face, image side 32,42,52,62,72 again, make this optical imaging lens 10 under the condition shortening system length, still possess the optical property that effectively can overcome chromatic aberation, and preferably image quality is provided.
Three, by the explanation of aforementioned five embodiments, show the design of optical imaging lens 10 of the present invention, the system length of its these embodiments all can shorten to and be less than below 4mm, compared to existing optical imaging lens, apply the product that camera lens of the present invention can produce more slimming, economic benefit the present invention being had accord with the demands of the market.
Consult Figure 23, be one first embodiment of the electronic installation 1 of this optical imaging lens 10 of application of aforementioned, this electronic installation 1 comprises a casing 11, and one is arranged on image module 12 in this casing 11.Be only, for mobile phone, this electronic installation 1 is described at this, but the pattern of this electronic installation 1 is not as limit.
This image module 12 comprises lens barrel 21, the module rear seat unit 120 for for this lens barrel 21 arrange of this optical imaging lens 10, one foregoing for arranging for this optical imaging lens 10, and the image sensor 130 that is arranged at this optical imaging lens 10 image side.This imaging surface 100 (see Fig. 2) is formed at this image sensor 130.
This module rear seat unit 120 has a camera lens back seat 121, and one is arranged at image sensor back seat 122 between this camera lens back seat 121 and this image sensor 130.Wherein, this lens barrel 21 coaxially arranges along an axis II with this camera lens back seat 121, and this lens barrel 21 is arranged at inside this camera lens back seat 121.
Consult Figure 24, for one second embodiment of the electronic installation 1 of this optical imaging lens 10 of application of aforementioned, the essential difference of this electronic installation 1 of this second embodiment and this first embodiment is: this module rear seat unit 120 is voice coil motor (VCM) pattern.This camera lens back seat 121 have to fit outside one and this lens barrel 21 and the first pedestal 123, arranged along an axis III is arranged on along this axis III and around the second pedestal 124, of this first pedestal 123 arranged outside outside this first pedestal 123 and inside this second pedestal 124 between coil 125, and one to be arranged on outside this coil 125 and inside this second pedestal 124 between magnet assembly 126.
First pedestal 123 of this camera lens back seat 121 can move along this axis III with this lens barrel 21 and this optical imaging lens 10 be arranged in this lens barrel 21.This image sensor back seat 122 and this second pedestal 124 fit.Wherein, this optical filter 8 is arranged on this image sensor back seat 122.Other modular constructions of second embodiment of this electronic installation 1 are then similar with this electronic installation 1 of the first embodiment, do not repeat them here.
By this optical imaging lens 10 of installation, because the system length of this optical imaging lens 10 can effectively shorten, make the thickness of the first embodiment of this electronic installation 1 and the second embodiment can relative decrease and then make the product of more slimming, and still can provide good optical property and image quality, by this, make this electronic installation 1 of the present invention except having the economic benefit of reduce engine husk as raw material consumption, compact product design trend and consumption demand can also be met.
Although specifically show in conjunction with preferred embodiment and describe the present invention; but those skilled in the art should be understood that; not departing 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 (17)
1. an optical imaging lens, it is characterized in that: sequentially comprise an aperture, one first lens, one second lens, one the 3rd lens, one the 4th lens from thing side to image side along an optical axis, and one the 5th lens, and these first lens all have refractive index to the 5th lens, and comprise respectively one towards thing side and the thing side and that imaging light is passed through towards image side and the face, image side making imaging light pass through;
The convex surface part that this image side masks of this first lens has one to be positioned at circumference near zone;
This thing side of these the second lens has the concave part that is positioned at circumference near zone, and this image side mask of these the second lens has a concave part and being positioned at optical axis near zone to be positioned at the convex surface part of circumference near zone;
This thing side of 3rd lens has the concave part that is positioned at circumference near zone;
4th lens have positive refractive index, and this thing side of the 4th lens has the concave part that is positioned at optical axis near zone; And
This thing side of 5th lens has the convex surface part that is positioned at optical axis near zone;
Wherein, this optical imaging lens meets T5/G23≤1.1 and G45>G34, G23 is the clearance between these second lens and the 3rd lens on optical axis, G34 is the clearance between the 3rd lens and the 4th lens on optical axis, G45 is the clearance between the 4th lens and the 5th lens on optical axis, and T5 is the thickness of the 5th lens on optical axis.
2. a kind of optical imaging lens according to claim 1, it is characterized in that: wherein, these first lens, these second lens, the 3rd lens, the 4th lens and the thickness summation of the 5th lens on optical axis are ALT, and also meet following condition formulae: ALT/G23≤6.8.
3. a kind of optical imaging lens according to claim 2, it is characterized in that: wherein, these first lens are Gaa to four clearance summations of the 5th lens on optical axis, and the thickness of the 3rd lens on optical axis is T3, and also meets following condition formulae: Gaa/T3≤2.3.
4. a kind of optical imaging lens according to claim 2, is characterized in that: wherein, and the thickness of these the second lens on optical axis is T2, and the thickness of the 4th lens on optical axis is T4, and also meets following condition formulae: T4/T2≤2.9.
5. a kind of optical imaging lens according to claim 2, is characterized in that: wherein, and the system focal length of this optical imaging lens is EFL, and the thickness of the 3rd lens on optical axis is T3, and also meets following condition formulae: EFL/T3≤9.
6. a kind of optical imaging lens according to claim 1, is characterized in that: wherein, and the thickness of the 3rd lens on optical axis is T3, and the thickness of the 4th lens on optical axis is T4, and also meets following condition formulae: T4/T3≤2.5.
7. a kind of optical imaging lens according to claim 6, is characterized in that: wherein, and the thickness of these the first lens on optical axis is T1, and also meets following condition formulae: T1/T5≤1.3.
8. a kind of optical imaging lens according to claim 6, is characterized in that: also meet following condition formulae: T5/G34≤1.9.
9. a kind of optical imaging lens according to claim 6, is characterized in that: wherein, and the clearance between these first lens and this second lens on optical axis is G12, and also meets following condition formulae: G45/ (G12+G34)≤1.2.
10. a kind of optical imaging lens according to claim 1, is characterized in that: wherein, and the system focal length of this optical imaging lens is EFL, and also meets following condition formulae: EFL/T5≤7.8.
11. a kind of optical imaging lens according to claim 10, it is characterized in that: wherein, these first lens, these second lens, the 3rd lens, the 4th lens and the thickness summation of the 5th lens on optical axis are ALT, the thickness of 3rd lens on optical axis is T3, and also meets following condition formulae: ALT/T3≤7.
12. a kind of optical imaging lens according to claim 10, is characterized in that: wherein, and the thickness of the 3rd lens on optical axis is T3, and also meets following condition formulae: T5/T3≤1.3.
13. a kind of optical imaging lens according to claim 10, it is characterized in that: wherein, the thickness of these the second lens on optical axis is T2, the thickness of 3rd lens on optical axis is T3, the thickness of 4th lens on optical axis is T4, and also meets following condition formulae: T4/ (T2+T3)≤1.2.
14. a kind of optical imaging lens according to claim 1, is characterized in that: wherein, and the thickness of the 3rd lens on optical axis is T3, and also meets following condition formulae: T5/T3≤1.3.
15. a kind of optical imaging lens according to claim 14, is characterized in that: wherein, and the clearance between these first lens and this second lens on optical axis is G12, and also meets following condition formulae: G45/ (G12+G34)≤1.2.
16. a kind of optical imaging lens according to claim 14, is characterized in that: wherein, and these first lens are Gaa to four clearance summations of the 5th lens on optical axis, and also meet following condition formulae: Gaa/T5≤2.2.
17. 1 kinds of electronic installations, is characterized in that, comprise: a casing; And an image module, be mounted in this casing, and comprising just like lens barrel, the module rear seat unit for for this lens barrel arrange of the optical imaging lens according to any one of claim 1 to claim 16, for arranging for this optical imaging lens, and the image sensor that is arranged at the image side of this optical imaging lens.
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