CN103969793A - Optical imaging lens and electronic device utilizing same - Google Patents
Optical imaging lens and electronic device utilizing same Download PDFInfo
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- CN103969793A CN103969793A CN201310697230.3A CN201310697230A CN103969793A CN 103969793 A CN103969793 A CN 103969793A CN 201310697230 A CN201310697230 A CN 201310697230A CN 103969793 A CN103969793 A CN 103969793A
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Abstract
The invention discloses an optical imaging lens and an electronic device utilizing the same. The optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens. An object side of the first lens is provided with a convex surface portion near the optical axis, an object side of the second lens is provided with a convex surface portion near the circumference, an image side of the second lens is provided with a concave surface portion near the circumference, an image side of the third lens is provided with a convex surface portion near the optical axis, an image side of the fourth lens is provided with a concave surface portion near the circumference, the refractive rate of the fifth lens is positive and capable of providing for the system, the fifth lens is made of plastics, and an object side of the fifth lens is provided with a convex surface portion near the circumference. The five lenses of the optical imaging lens are the only lenses with the refractive rate. The electronic device comprises a casing and an imaging module mounted in the casing. The imaging module comprises the optical imaging lens, a lens cone, a module holder unit and an image sensor. By matching of the surfaces of the lenses, imaging quality can be guaranteed.
Description
Technical field
The invention relates to a kind of optical lens, refer to especially a kind of optical imaging lens and apply the electronic installation of this optical imaging lens.
Background technology
In recent years, consider traffic safety, and to demands such as environmental surveillances, the requirement of the angle of view of user to camera module is also increasing.
Along with photosensitive coupling component (Charge Coupled Device, or complementary matal-oxide semiconductor assembly (Complementary Metal-Oxide Semiconductor CCD), CMOS) technical progress, dress is worn over that optical imaging lens in camera module must maintain favorable optical performance and length can not be long.
Wherein, patent US 7911711, US 20130057968 and US 20120307382, field angle is all less, cannot meet the need of market.
Therefore,, under the condition that maintains favorable optical performance, the field angle that how to increase camera lens is existing market demand.
Summary of the invention
Therefore, object of the present invention,, providing under a kind of condition of the field angle that is increasing camera lens, still can possess the optical imaging lens of good optical property.
So, optical imaging lens of the present invention, from thing side to sequentially comprising a first lens as side along an optical axis, one second lens, one the 3rd lens, one the 4th lens, and one the 5th lens, and this first lens to the 5th lens all comprise one towards thing side and make thing side that imaging light passes through and one towards as side and picture side that imaging light is passed through, wherein, this thing side of this first lens has a convex surface part that is positioned at optical axis near zone, this thing side of these the second lens has a convex surface part that is positioned at circumference near zone, and this has the concave surface portion of all near zones of a circle of position as side, this of the 3rd lens has the convex surface part of an optical axis near zone as side, this of the 4th lens has a concave surface portion that is positioned at circumference near zone as side, the refractive index of the 5th lens is for just, and material is plastics, this thing side has a convex surface part that is positioned at circumference near zone, wherein, the lens that this optical imaging lens has refractive index only have above-mentioned five lens.
Effect of the present invention is, this thing side of this first lens has this convex surface part that is positioned at optical axis near zone, contribute to light optically focused to shorten lens length, the refractive index of the 5th lens is for just, the positive refractive index of system can be provided, in addition, because this thing side of this first lens has this convex surface part of optical axis near zone, this thing side of these the second lens has this convex surface part of circumference near zone, this of these the second lens has this concave surface portion of circumference near zone as side, this of the 3rd lens has this convex surface part of optical axis near zone as side, this of the 4th lens has this concave surface portion of circumference near zone as side, this thing side of the 5th lens has this convex surface part of circumference near zone, by the collocation of these face types, can guarantee image quality, and the material of the 5th lens is plastics, can reduce cost of manufacture, and alleviate the weight of camera lens.
Therefore, another object of the present invention, is providing a kind of electronic installation that is applied to aforesaid optical imaging lens.
So electronic installation of the present invention, comprises a casing, and an image module being arranged in this casing.This image module comprise just like aforementioned described optical imaging lens, for the lens barrel, that arranges for this optical imaging lens the module back seat unit for arranging for this lens barrel, an and image sensor that is arranged at this optical imaging lens head portrait side.
The beneficial effect of electronic installation of the present invention is: in this electronic installation, load the image module with aforesaid optical imaging lens, increasing under the condition of field angle of camera lens in order to this imaging lens, the advantage of good optical property still can be provided, under the situation of not sacrificing optical property, make more slim light and handy electronic installation, make the present invention have good Practical Performance concurrently and contribute to the structural design of the field angle that increases camera lens, and can meet higher-quality consumption demand.
Brief description of the drawings
Other feature and effect of the present invention will clearly present in the embodiment with reference to accompanying drawing, wherein:
Fig. 1 is a schematic diagram, and a lens arrangement is described;
Fig. 2 is a configuration schematic diagram, and an embodiment mono-of optical imaging lens of the present invention is described;
Fig. 3 is every aberration diagram of longitudinal spherical aberration, astigmatic image error and the distortion aberration of this embodiment mono-;
Fig. 4 is a tabular drawing, and the optical data of each lens of this embodiment mono-is described;
Fig. 5 is a tabular drawing, and the asphericity coefficient of each lens of this embodiment mono-is described;
Fig. 6 is a schematic diagram, and the axis of reference of aspheric curve is described;
Fig. 7 is a configuration schematic diagram, and an embodiment bis-of optical imaging lens of the present invention is described;
Fig. 8 is every aberration diagram of longitudinal spherical aberration, astigmatic image error and the distortion aberration of this embodiment bis-;
Fig. 9 is a tabular drawing, and the optical data of each lens of this embodiment bis-is described;
Figure 10 is a tabular drawing, and the asphericity coefficient of each lens of this embodiment bis-is described;
Figure 11 is a configuration schematic diagram, and an embodiment tri-of optical imaging lens of the present invention is described;
Figure 12 is every aberration diagram of longitudinal spherical aberration, astigmatic image error and the distortion aberration of this embodiment tri-;
Figure 13 is a tabular drawing, and the optical data of each lens of this embodiment tri-is described;
Figure 14 is a tabular drawing, and the asphericity coefficient of each lens of this embodiment tri-is described;
Figure 15 is a configuration schematic diagram, and an embodiment tetra-of optical imaging lens of the present invention is described;
Figure 16 is every aberration diagram of longitudinal spherical aberration, astigmatic image error and the distortion aberration of this embodiment tetra-;
Figure 17 is a tabular drawing, and the optical data of each lens of this embodiment tetra-is described;
Figure 18 is a tabular drawing, and the asphericity coefficient of each lens of this embodiment tetra-is described;
Figure 19 is a configuration schematic diagram, and an embodiment five of optical imaging lens of the present invention is described;
Figure 20 is every aberration diagram of longitudinal spherical aberration, astigmatic image error and the distortion aberration of this embodiment five;
Figure 21 is a tabular drawing, and the optical data of each lens of this embodiment five is described;
Figure 22 is a tabular drawing, and the asphericity coefficient of each lens of this embodiment five is described;
Figure 23 is a configuration schematic diagram, and one the 6th embodiment of optical imaging lens of the present invention is described;
Figure 24 is every aberration diagram of longitudinal spherical aberration, astigmatic image error and the distortion aberration of the 6th embodiment;
Figure 25 is a tabular drawing, and the optical data of each lens of the 6th embodiment is described;
Figure 26 is a tabular drawing, and the asphericity coefficient of each lens of the 6th embodiment is described;
Figure 27 is a configuration schematic diagram, and one the 7th embodiment of optical imaging lens of the present invention is described;
Figure 28 is every aberration diagram of longitudinal spherical aberration, astigmatic image error and the distortion aberration of the 7th embodiment;
Figure 29 is a tabular drawing, and the optical data of each lens of the 7th embodiment is described;
Figure 30 is a tabular drawing, and the asphericity coefficient of each lens of the 7th embodiment is described;
Figure 31 is a tabular drawing, illustrates that this embodiment mono-of this optical imaging lens is to every optical parametric of the 6th embodiment; And
Figure 32 is a cross-sectional schematic, and an embodiment mono-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
32 picture sides
4 second lens
41 thing sides
411 convex surface part
412 concave surface portions
42 picture sides
421 concave surface portions
5 the 3rd lens
51 thing sides
511 concave surface portions
52 picture sides
521 convex surface part
6 the 4th lens
61 thing sides
611 convex surface part
612 concave surface portions
62 picture sides
621 concave surface portions
7 the 5th lens
71 thing sides
711 convex surface part
72 picture sides
8 optical filters
81 thing sides
82 picture sides
9 imaging surfaces
I optical axis
1 electronic installation
11 casings
12 image modules
120 module back seat unit
121 camera lens back seats
122 image sensor back seats
130 image sensors
21 lens barrels
II axis
Embodiment
Before the present invention is described in detail, should be noted that in the following description content, similarly assembly is to represent with identical numbering.
This section of " lens has positive refractive index (or negative refractive index) " that instructions is sayed, refers to that described lens have positive refractive index (or negative refractive index) at optical axis near zone." the thing side (or picture side) of lens has the convex surface part (or concave surface portion) that is positioned at certain region ", refer to the exterior lateral area of this region compared to this region of radially upper next-door neighbour, towards more " outwardly convex " (or " the caving inward ") of direction that is parallel to optical axis, taking Fig. 1 as example, wherein I be optical axis and this lens be taking this optical axis I as axis of symmetry radially symmetrical, the thing side of these lens has convex surface part in a-quadrant, B region has concave surface portion and C region has convex surface part, reason is the exterior lateral area (be B region) of a-quadrant compared to this region of radially upper next-door neighbour, towards the more outwardly convex of direction that is parallel to optical axis, B region more caves inward compared to C region, and C region compared to E region also outwardly convex more in like manner." circumference near zone ", refer to the circumference near zone that is positioned at the curved surface only passing through for imaging light on lens, that is C region in figure, wherein, imaging light has comprised chief ray (chief ray) Lc and marginal ray (marginal ray) Lm." optical axis near zone " refers to the optical axis near zone of this curved surface only passing through for imaging light, that is a-quadrant in Fig. 1.In addition, these lens also comprise an extension E, use for this entirety of lens package in an optical imaging lens, 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, following embodiment is for asking accompanying drawing succinctly all to omit extension.
Consult Fig. 2, an embodiment mono-of optical imaging lens 10 of the present invention, from thing side to sequentially comprising a first lens 3, one second lens 4, one the 3rd lens 5, an aperture 2, one the 4th lens 6, one the 5th lens 7 as side along an optical axis I, and an optical filter 8.
When the light being sent by a thing to be taken enters this optical imaging lens 10, and via this first lens 3, these second lens 4, the 3rd lens 5, this aperture 2, the 4th lens 6, the 5th lens 7, and after this optical filter 8, can form an image at an imaging surface 9 (Image Plane).This optical filter 8 is infrared filter (IR Cut Filter), affects image quality for the infrared transmitting that prevents light to this imaging surface 9.
Supplementary notes, thing side is the side towards this thing to be taken, and is the side towards this imaging surface 9 as side.
Here special instruction is, image sensor used in the present invention is to adopt chip direct package (COB, Chip on Board) packaged type or crystallite dimension encapsulation (CSP, Chip Scale Package) packaged type, so also can be other packaged types, do not disclose and be limited with this.
Wherein, this first lens 3, these second lens 4, the 3rd lens 5, the 4th lens 6, the 5th lens 7, and this optical filter 8 all has respectively one towards thing side and thing side 31,41,51,61,71,81 that imaging light is passed through, and one towards as side and picture side 32,42,52,62,72,82 that imaging light is passed through.Wherein, except first lens 3, the thing side 41,51,61,71 of these second lens 4, the 3rd lens 5, the 4th lens 6, the 5th lens 7 and be all aspheric surface as side 42,52,62,72.
This first lens 3 has negative refractive index, and this thing side 31 is for convex surface and have a convex surface part 311 that is positioned at optical axis I near zone, and this is concave surface as side 32, the spherical mirror that this first lens 3 is glass material.
These second lens 4 have negative refractive index, this thing side 41 is for convex surface and have a convex surface part 411 that is positioned at circumference near zone, this as side 42 for concave surface and there is a concave surface portion 421 that is positioned at circumference near zone, the aspheric mirror that these second lens 4 are plastic material.
The 3rd lens 5 have positive refractive index, and this thing side 51 is concave surface the concave surface portion 511 with optical axis I near zone, and this is convex surface as side 52 and has the aspheric mirror that convex surface part 521, the three lens 5 that are positioned at optical axis I near zone are plastic material.
The 4th lens 6 have negative refractive index, and this thing side 61 is convex surface, and this is concave surface as side 62 and has the aspheric mirror that concave surface portion 621, the four lens 6 that are positioned at circumference near zone are plastic material.
The 5th lens 7 have positive refractive index, and this thing side 71 is for convex surface and have a convex surface part 711 that is positioned at circumference near zone, and this is convex surface as side 72, the aspheric mirror that the 5th lens 7 are plastic material.
In the present embodiment one, only have this first lens 3, these second lens 4, the 3rd lens 5, the 4th lens 6, the 5th lens 7 to there is refractive index.
Other detailed optical datas of this embodiment mono-as shown in Figure 4, and the total system focal length of this embodiment mono-(effective focal length, be called for short EFL) be 1.297mm, half angle of view (half field of view, be called for short HFOV) be that 82.695 degree, f-number (Fno) they are 2, its system length (TTL) is 35.002mm.Wherein, this system length refers to that this thing side 31 by this first lens 3 is to the distance imaging surface 8 is on optical axis I.
In addition, from thing side 41,51,61,71 and the picture side 42,52,62,72 of these second lens 4, the 3rd lens 5, the 4th lens 6, the 5th lens 7, amounting to eight faces is all aspheric surfaces, and this aspheric surface is according to following formula definition:
Wherein:
Z: the aspheric degree of depth (point that in aspheric surface, distance optical axis is y, with the tangent plane that is tangential on summit on aspheric surface optical axis, vertical range between the two);
C: the curvature (the vertex curvature) on aspheric surface summit;
K: conical surface coefficient (Conic Constant);
radial distance (radial distance)
R
n: normalization radius (normalization radius, NRADIUS);
u：r/r
n；
A
m: m rank Q
concoefficient (the m
thq
concoefficient);
Q
m con: m rank Q
conpolynomial expression (the m
thq
conpolynomial);
As shown in Figure 6, wherein z axle is exactly optical axis I to x, y, z relation.
As shown in Figure 4, to the picture side 72 of the 5th lens 7, the every asphericity coefficient in formula (1) is as shown in Figure 5 in the thing side 41 of these the second lens 4 for the detailed optical data of embodiment mono-.
In addition, the relation in the optical imaging lens 10 of this embodiment mono-between each important parameter and each important parameter is as shown in field under embodiment in Figure 31 mono-, wherein:
CT1 is the center thickness of this first lens 3 at optical axis I;
CT2 is the center thicknesses of these second lens 4 at optical axis I;
CT3 is the center thicknesses of the 3rd lens 5 at optical axis I;
CT4 is the center thicknesses of the 4th lens 6 at optical axis I;
CT5 is the center thicknesses of the 5th lens 7 at optical axis I;
AC12 is that this first lens 3 is to this clearance of the second lens 4 on optical axis I;
AC23 is that these second lens 4 are to the 3rd clearance of lens 5 on optical axis I;
AC34 is that the 3rd lens 5 are to the 4th clearance of lens 6 on optical axis I;
AC45 is that the 4th lens 6 are to the 5th clearance of lens 7 on optical axis I;
EFL is the system focal length of this optical imaging lens 10;
BFL be this of the 5th lens 7 as side 72 to the distance of this imaging surface 9 on optical axis I.
Coordinate and consult Fig. 3 again, (a) longitudinal spherical aberration (longitudinalspherical aberration) of this first embodiment of brief description of the drawings, (b) with the accompanying drawing of (c), this first embodiment astigmatic image error (astigmatism aberration) about the sagitta of arc (sagittal) direction on imaging surface 8 is described respectively, and the astigmatic image error of meridian (tangential) direction, the distortion aberration (distortion aberration) of this first embodiment of brief description of the drawings (d) on imaging surface 8.
This first embodiment is in longitudinal spherical aberration pictorial image 3 (a), the curve that each wavelength becomes all very close to and close to centre, the Off-axis-light that each wavelength differing heights is described all concentrates near imaging point, skewness magnitude level by the curve of each wavelength can be found out, the imaging point deviation control of the Off-axis-light of differing heights is within the scope of ± 0.01mm, therefore the present embodiment obviously improves the spherical aberration of identical wavelength really, in addition, three kinds represent that wavelength distance is to each other also quite approaching, the image space that represents different wave length light is quite concentrated, thereby make chromatic aberation also obtain obvious improvement.
During Fig. 3 (b) illustrates with two astigmatic image errors of 3 (c), three kinds represent in the drop on ± 0.1mm of focal length variations amount of wavelength in whole field range, illustrate that the optical system of this first embodiment can effectively be eliminated aberration.
The distortion aberration accompanying drawing of Fig. 3 (d) shows the distortion aberration of this first embodiment, illustrates that the distortion aberration of this first embodiment has met the image quality requirement of optical system.
This first embodiment of explanation is compared to existing optical lens accordingly, be under the condition of 82.695 degree at half angle of view, still can provide preferably image quality, therefore this first embodiment can be under the condition that maintains favorable optical performance, to increase the product design of field angle of camera lens.
Consult Fig. 7, for an embodiment bis-of optical imaging lens 10 of the present invention, it is roughly similar to this embodiment mono-, difference is that this thing side 41 of these the second lens 4 has this thing side 61 that is positioned at the concave surface portion 412 of optical axis I near zone and these convex surface part 411, the four lens 6 of circumference near zone and have a convex surface part 611 and that is positioned at optical axis I near zone and be positioned at the concave surface portion 612 of circumference near zone.
As shown in Figure 9, and the total system focal length of this embodiment bis-is 1.600mm to its detailed optical data, and half angle of view (HFOV) is that 83.712 degree, f-number (Fno) are 2, and system length is 26.192mm.
As shown in figure 10, be the every asphericity coefficient in formula (1) as side 72 of thing side the 41 to the 5th lens 7 of these the second lens 4 of this embodiment bis-.
In addition, in this optical imaging lens 10 of this embodiment bis-, the pass between each important parameter and each important parameter is as shown in field under embodiment in Figure 31 bis-.
Coordinate and consult Fig. 8, by the astigmatic image error of the longitudinal spherical aberration of (a), (b), (c), and distortion aberration accompanying drawing (d), can find out that the present embodiment two also can maintain favorable optical performance.
Consult Figure 11, for an embodiment tri-of optical imaging lens 10 of the present invention, it is roughly similar to this embodiment mono-, and difference is that this thing side 61 of the 4th lens 6 has a convex surface part 611 and that is positioned at optical axis I near zone and be positioned at the concave surface portion 612 of circumference near zone.
As shown in figure 13, and the total system focal length of this embodiment tri-is 1.292mm to its detailed optical data, and half angle of view (HFOV) is that 83.553 degree, f-number (Fno) are 2, and system length is 35.008mm.
As shown in figure 14, be the every asphericity coefficient in formula (1) as side 72 of thing side the 41 to the 5th lens 7 of these the second lens 4 of this embodiment tri-.
In addition, in this optical imaging lens 10 of this embodiment tri-, the pass between each important parameter and each important parameter is as shown in field under embodiment in Figure 31 tri-.
Coordinate and consult Figure 12, by the astigmatic image error of the longitudinal spherical aberration of (a), (b), (c), and distortion aberration accompanying drawing (d), can find out that the present embodiment three also can maintain favorable optical performance.
Consulting Figure 15, is an embodiment tetra-of optical imaging lens 10 of the present invention, and it is roughly similar to this embodiment bis-.As shown in figure 17, and the total system focal length of this embodiment tetra-is 1.518mm to its detailed optical data, and half angle of view (HFOV) is that 84.843 degree, f-number (Fno) are 2, and system length is 32.830mm.
As shown in figure 18, be the every asphericity coefficient in formula (1) as side 72 of thing side the 41 to the 5th lens 7 of these the second lens 4 of this embodiment tetra-.
In addition, in this optical imaging lens 10 of this embodiment tetra-, the pass between each important parameter and each important parameter is as shown in field under embodiment in Figure 31 tetra-.
Coordinate and consult Figure 16, by the astigmatic image error of the longitudinal spherical aberration of (a), (b), (c), and distortion aberration accompanying drawing (d), can find out that the present embodiment four also can maintain favorable optical performance.
Consulting Figure 19, is an embodiment five of optical imaging lens 10 of the present invention, and it is roughly similar to this embodiment mono-.As shown in figure 21, and the total system focal length of this embodiment five is 1.270mm to its detailed optical data, and half angle of view (HFOV) is that 81.304 degree, f-number (Fno) are 2, and system length is 34.986mm.
As shown in figure 22, be the every asphericity coefficient in formula (1) as side 72 of thing side the 41 to the 5th lens 7 of these the second lens 4 of this embodiment five.
In addition, in this optical imaging lens 10 of this embodiment five, the pass between each important parameter and each important parameter is as shown in field under embodiment in Figure 31 five.
Coordinate and consult Figure 20, by the astigmatic image error of the longitudinal spherical aberration of (a), (b), (c), and distortion aberration accompanying drawing (d), can find out that the present embodiment five also can maintain favorable optical performance.
Consulting Figure 23, is an embodiment six of optical imaging lens 10 of the present invention, and it is roughly similar to this embodiment mono-.As shown in figure 25, and the total system focal length of this embodiment six is 1.219mm to its detailed optical data, and half angle of view (HFOV) is that 83.164 degree, f-number (Fno) are 2, and system length is 34.998mm.
As shown in figure 26, be the every asphericity coefficient in formula (1) as side 72 of thing side the 41 to the 5th lens 7 of these the second lens 4 of this embodiment six.
In addition, in this optical imaging lens 10 of this embodiment six, the pass between each important parameter and each important parameter is as shown in field under embodiment in Figure 31 six.
Coordinate and consult Figure 24, by the astigmatic image error of the longitudinal spherical aberration of (a), (b), (c), and distortion aberration accompanying drawing (d), can find out that the present embodiment six also can maintain favorable optical performance.
Consult Figure 27, for an embodiment seven of optical imaging lens 10 of the present invention, it is roughly similar to this embodiment mono-, difference is that the thing side 41 of these the second lens 4 has a concave surface portion 412 that is positioned at optical axis I near zone, and the convex surface part 411 of a circumference near zone, the thing side 51 of the 3rd lens 5 is convex surface, and the thing side 61 of the 4th lens 6 is concave surface.
As shown in figure 29, and the total system focal length of this embodiment seven is 1.343mm to its detailed optical data, and half angle of view (HFOV) is that 83.6431 degree, f-number (Fno) are 2, and system length is 20.613mm.
As shown in figure 30, be the every asphericity coefficient in formula (1) as side 72 of thing side the 41 to the 5th lens 7 of these the second lens 4 of this embodiment seven.
In addition, in this optical imaging lens 10 of this embodiment seven, the pass between each important parameter and each important parameter is as shown in field under embodiment in Figure 31 seven.
Coordinate and consult Figure 28, by the astigmatic image error of the longitudinal spherical aberration of (a), (b), (c), and distortion aberration accompanying drawing (d), can find out that the present embodiment seven also can maintain favorable optical performance.
Coordinate and consult Figure 31 again, for the tabular drawing of every optical parametric of above-mentioned seven embodiment, in the time that the relational expression between the every optical parametric in optical imaging lens 10 of the present invention meets following conditional, under the situation improving in field angle, still have preferably optical property performance, while making the present invention be applied to relevant portable electronic devices, can make the product of wide-angle more:
(1) EFL/CT1≤2.50: contribute to field angle to expand because EFL shortens, and the optics effective diameter of this first lens 3 is larger, so the amplitude that CT1 shortens is less, therefore the amplitude that EFL shortens is less compared with amplitude large and that CT1 shortens, preferably meet 0.1≤EFL/CT1≤2.5.
(2) (AC12+AC45)/AC34≤8.50: consider the path of light, in the time meeting this conditional, have preferably configuration to make contraction in length, preferably meet 0.8≤(AC12+AC45)/AC34≤8.5.
(3) EFL/AC23≤0.7: contribute to field angle to expand because EFL shortens, and the path of consideration light, the amplitude that AC23 shortens is subject to larger restriction, therefore the amplitude that EFL shortens is less compared with amplitude large and that AC23 shortens, preferably meets 0.1≤EFL/AC23≤0.7.
(4) BFL/AC34≤3.00: contribute to optical imaging lens 10 contraction in lengths because BFL shortens, and the path of consideration light, the amplitude that AC34 shortens is subject to larger restriction, therefore the amplitude that BFL shortens is less compared with amplitude large and that AC34 shortens, preferably meets 0.7≤BFL/AC34≤3.
(5) 3.00≤(CT1+AC23)/CT5: the path of the large and light of the optics effective diameter of considering this first lens 3, so the amplitude that CT1 and AC23 shorten is subject to larger restriction, therefore the amplitude shortening is less, and the optics effective diameter of the 5th lens 7 is less, so the amplitude shortening can be larger, preferably meet 3.00≤(CT1+AC23)/CT5≤15.
(6) CT3/CT1≤2.50: because the optics effective diameter of the 3rd lens 5 is less, and the optics effective diameter of this first lens 3 is larger, therefore the amplitude that CT3 shortens is less compared with amplitude large and that CT1 shortens, preferably meet 0.50≤CT3/CT1≤2.50.
(7) CT2/AC34≤1.50: because the optics effective diameter of these the second lens 4 is less, so the amplitude that CT2 shortens is larger, and the path of consideration light, the amplitude that AC34 shortens is subject to larger restriction, therefore the amplitude that AC34 shortens is less, preferably meets 0.15≤CT2/AC34≤1.50.
(8) 3.00≤(CT1+AC23)/EFL: as mentioned above, the amplitude that CT1 and AC23 shorten is less, and the amplitude that EFL shortens is larger, preferably meets 3.00≤(CT1+AC23)/EFL≤10.50.
(9) BFL/AC23≤2.00: as mentioned above, the amplitude that BFL shortens is less compared with amplitude large and that AC23 shortens, preferably between 0.50≤BFL/AC23≤2.00.
(10) (AC12+AC45)/AC23≤5.00: consider the path of light, in the time meeting this conditional, have preferably configuration to make contraction in length, preferably meet 0.50≤(AC12+AC45)/AC23≤5.00
(11), therefore when meeting this conditional, there is preferably configuration CT3/AC34≤4.00: as mentioned above, the amplitude that CT3 shortens is less compared with amplitude large and that AC34 shortens, preferably between 0.3≤CT3/AC34≤4.00
(12) CT5/CT1≤1.5: the amplitude that CT5 shortens is as mentioned above less compared with amplitude large and that CT1 shortens, so conditional can be subject to a ceiling restriction, preferably between 0.2≤CT5/CT1≤1.5
(13) CT3/AC23≤2.00: as mentioned above, the amplitude that CT3 shortens is less compared with amplitude large and that AC23 shortens, so conditional can be subject to a ceiling restriction, preferably between 0.3≤CT3/AC23≤2.
(14) EFL/AC34≤1.00: as mentioned above, the amplitude that EFL shortens is less compared with amplitude large and that AC34 shortens, so conditional can be subject to a ceiling restriction, preferably between 0.2≤EFL/AC34≤1.00.
(15) 2.30≤(CT1+AC23)/CT2: as mentioned above, the amplitude that CT1 and AC23 shorten is less, and the amplitude that CT2 shortens is larger, preferably meets 2.30≤(CT1+AC23)/CT2≤6.00.
Conclude above-mentionedly, optical imaging lens 10 of the present invention, can obtain following effect and advantage, therefore can reach object of the present invention:
One, the thing side 31 of this first lens 3 has this convex surface part 311 that is positioned at optical axis I near zone, contribute to light optically focused to shorten lens length, the refractive index of the 5th lens 7 is for just, the positive refractive index of system can be provided, in addition, this thing side 31 of this first lens 3 has this convex surface part 311 of optical axis I near zone, this thing side 41 of these the second lens 4 has the convex surface part 411 of circumference near zone, this of these the second lens 4 has the concave surface portion 421 of circumference near zone as side 42, this of the 3rd lens 5 has this convex surface part 521 of optical axis I near zone as side 52, this of the 4th lens 6 has the concave surface portion 621 of circumference near zone as side 62, this thing side 71 of the 5th lens 7 has the convex surface part 711 of circumference near zone, by the collocation of these face types, can guarantee image quality, and the material of the 5th lens 7 is plastics, can reduce cost of manufacture, and alleviate the weight of camera lens, if arrange in pairs or groups, the thing side 51 of the 3rd lens 5 has the concave surface portion 511 of optical axis I near zone again, can more effectively improve image quality.
Two, the present invention is by the control of relevant design parameter, for example EFL/CT1, (AC12+AC45)/AC34, EFL/AC23, BFL/AC34, (CT1+AC23)/CT5, CT3/CT1, CT2/AC34, (CT1+AC23)/EFL, BFL/AC23, (AC12+AC45)/AC23, CT3/AC34, CT5/CT1, CT3/AC23, EFL/AC34, (CT1+AC23)/parameters such as CT2, whole system is had and preferably eliminate aberration ability, for example eliminate the ability of spherical aberration, fit lens 3 again, 4, 5, 6, 7 thing sides 31, 41, 51, 61, 71 or picture side 32, 42, 52, 62, 72 concaveconvex shape design and arrangement, this optical imaging lens 10 is being improved under the condition of field angle, still possesses the optical property that can effectively overcome chromatic aberation, and provide preferably image quality.
Three, by the explanation of aforementioned six embodiment, show the design of optical imaging lens 10 of the present invention, more than the half angle of view of these embodiment all can be brought up to and be greater than 81.304 degree, compared to existing optical imaging lens, apply camera lens of the present invention and can produce the more product of wide-angle, the economic benefit that the present invention is had accord with the demands of the market.
Consulting Figure 32, is an embodiment of the electronic installation 1 of this optical imaging lens 10 of application of aforementioned, and this electronic installation 1 comprises a casing 11, and an image module 12 being arranged in this casing 11.Be only that this electronic installation 1 is described as an example of supervising device example at this, but the pattern of this electronic installation 1 is not as limit.
This image module 12 comprises foregoing this optical imaging lens 10, a lens barrel arranging for this optical imaging lens 10 of confession 21, a module back seat unit 120 arranging for this lens barrel 21 of confession, and one is arranged at the image sensor 130 of this optical imaging lens 10 as sides.This imaging surface 9 (seeing Fig. 2) is to be formed at this image sensor 130.
This module back seat unit 120 has a camera lens back seat 121, and an image sensor back seat 122 being arranged between this camera lens back seat 121 and this image sensor 130.Wherein, this lens barrel 21 is coaxially to arrange along an axis II with this camera lens back seat 121, and this lens barrel 21 is arranged at this camera lens back seat 121 inner sides.
By this optical imaging lens 10 is installed, because the field angle of this optical imaging lens 10 can effectively improve, and the thickness of this electronic installation 1 maintains slimming and then makes the more product of wide-angle, and good optical property and image quality still can be provided.Therefore, this electronic installation 1 of the present invention, except having the economic benefit that reduces casing raw material consumption, can also meet product design trend and the consumption demand of wide-angle.
Although specifically show and introduced the present invention in conjunction with preferred embodiment; 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 (18)
1. an optical imaging lens, from thing side to sequentially comprising a first lens, one second lens, one the 3rd lens, one the 4th lens as side along an optical axis, and one the 5th lens, and this first lens to the 5th lens all comprise one towards thing side and make thing side that imaging light passes through and one towards as side and picture side that imaging light is passed through, wherein:
This thing side of this first lens has a convex surface part that is positioned at optical axis near zone;
This thing side of these the second lens has a convex surface part that is positioned at circumference near zone, and this as side have one circle of position week near zone concave surface portion;
This of the 3rd lens has the convex surface part of an optical axis near zone as side;
This of the 4th lens has a concave surface portion that is positioned at circumference near zone as side;
The refractive index of the 5th lens is being for just, and material is plastics, and this thing side has a convex surface part that is positioned at circumference near zone;
Wherein, the lens that this optical imaging lens has a refractive index only have above-mentioned five lens.
2. optical imaging lens as claimed in claim 1, is characterized in that, the system focal length that EFL is this optical imaging lens, and CT1 is the thickness of this first lens on optical axis, formula meets the following conditions:
EFL/CT1≦2.50。
3. optical imaging lens as claimed in claim 2, it is characterized in that, AC12 is the clearance on optical axis between this first lens and this second lens, AC45 is the clearance on optical axis between the 4th lens and the 5th lens, AC34 is the clearance on optical axis between the 3rd lens and the 4th lens, and formula meets the following conditions:
(AC12+AC45)/AC34≦8.50。
4. optical imaging lens as claimed in claim 3, is characterized in that, AC23 is the clearance on optical axis between these second lens and the 3rd lens, and the EFL formula that meets the following conditions:
EFL/AC23≦0.7。
5. optical imaging lens as claimed in claim 3, is characterized in that, BFL be the 5th lens this as side to an imaging surface distance on optical axis, and the AC34 formula that meets the following conditions:
BFL/AC34≦3.00。
6. optical imaging lens as claimed in claim 5, is characterized in that, AC23 is the clearance on optical axis between these second lens and the 3rd lens, and CT5 is the thickness of the 5th lens on optical axis, and the CT1 formula that meets the following conditions:
3.00≦(CT1+AC23)/CT5。
7. optical imaging lens as claimed in claim 1, is characterized in that, CT3 is the thickness of the 3rd lens on optical axis, and CT1 is the thickness of this first lens on optical axis, and formula meets the following conditions:
CT3/CT1≦2.50。
8. optical imaging lens as claimed in claim 7, is characterized in that, CT2 is the thickness of these the second lens on optical axis, and AC34 is the clearance on optical axis between the 3rd lens and the 4th lens, and formula meets the following conditions:
CT2/AC34≦1.50。
9. want the optical imaging lens as described in 8 as right, it is characterized in that, AC23 is the clearance on optical axis between these second lens and the 3rd lens, the system focal length that EFL is this optical imaging lens, and the CT1 formula that meets the following conditions:
3.00≦(CT1+AC23)/EFL。
10. optical imaging lens as claimed in claim 8, it is characterized in that, BFL be the 5th lens this as side to an imaging surface distance on optical axis, AC23 is the clearance on optical axis between these second lens and the 3rd lens, formula meets the following conditions:
BFL/AC23≦2.00。
11. optical imaging lens as claimed in claim 10, is characterized in that, this thing side of the 3rd lens also has a concave surface portion that is positioned at optical axis near zone.
12. optical imaging lens as claimed in claim 1, it is characterized in that, AC12 is the clearance on optical axis between this first lens and this second lens, AC45 is the clearance on optical axis between the 4th lens and the 5th lens, AC23 is the clearance on optical axis between these second lens and the 3rd lens, and formula meets the following conditions:
(AC12+AC45)/AC23≦5.00。
13. optical imaging lens as claimed in claim 12, is characterized in that, CT3 is the thickness of the 3rd lens on optical axis, and AC34 is the clearance on optical axis between the 3rd lens and the 4th lens, and formula meets the following conditions:
CT3/AC34≦4.00。
14. optical imaging lens as claimed in claim 13, is characterized in that, CT5 is the thickness of the 5th lens on optical axis, and CT1 is the thickness of this first lens on optical axis, and formula meets the following conditions:
CT5/CT1≦1.50。
15. optical imaging lens as claimed in claim 1, is characterized in that, CT3 is the thickness of the 3rd lens on optical axis, and AC23 is the clearance on optical axis between these second lens and the 3rd lens, and formula meets the following conditions:
CT3/AC23≦2.00。
16. optical imaging lens as claimed in claim 15, is characterized in that, the system focal length that EFL is this optical imaging lens, and AC34 is the clearance on optical axis between the 3rd lens and the 4th lens, formula meets the following conditions:
EFL/AC34≦1.00。
17. optical imaging lens as claimed in claim 16, it is characterized in that, CT1 is the thickness of this first lens on optical axis, and AC23 is the clearance on optical axis between these second lens and the 3rd lens, CT2 is the thickness of these the second lens on optical axis, and formula meets the following conditions:
2.30≦(CT1+AC23)/CT2。
18. 1 kinds of portable electronic devices, comprise:
One casing; And
One image module, be mounted in this casing, and comprise just like arbitrary described optical imaging lens in claim 1～17, for the lens barrel, that arranges for this optical imaging lens the module back seat unit for arranging for this lens barrel, an and image sensor that is arranged at this optical imaging lens head portrait side.
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