CN103389566B - Imaging lens - Google Patents

Abstract

The present invention relates to a kind of imaging lens, the most sequentially include: the first lens, the second lens, the 3rd lens, the 4th lens and the 5th lens.First lens contain the aspheric surface that one side is above.Second lens have negative optical power, the second lens convex surface facing thing side and containing one side more than aspheric surface.3rd lens have positive optical power, and the concave surface of the 3rd lens is towards thing side and containing aspheric surface more than one side.4th lens have negative optical power, and the concave surface of the 4th lens is towards image side and containing aspheric surface more than one side.5th lens have positive optical power, the 5th lens convex surface facing thing side and containing one side more than aspheric surface.By above-mentioned configuration, imaging lens has shorter optics total length and relatively large aperture, can promote image quality.

Description

Imaging lens

Technical field

The invention relates to a kind of camera lens, and in particular to a kind of imaging lens (imaging lens).

Background technology

It is indebted to the progress of science and technology, the most portable electronic product, such as light and thin type digital camera, mobile phone or flat board The market of computer is vigorously developed.For this series products, taking a picture or photographing is one of indispensable function already.At this In the case of sample, the demand for miniaturization imaging lens is more and more higher.

For the low picture element camera model entering gate, the eyeglass below two panels can form suitable imaging lens, Demand with satisfied parsing image.Along with the increase of picture element, the eyeglass demand of imaging lens also can increase, such as: 2,000,000 draw Camera model more than element needs four eyeglasses to form imaging lens；If being intended to meet the camera mould of more than 8,000,000 picture elements Block, typically need to use five eyeglasses to form imaging lens.In other words, the eyeglass number used when the imaging lens of camera model is got over Many, then the overall optical length of imaging lens can be elongated, and this can cause problem below on the contrary: cannot meet camera model frivolous The demand changed.

Under the trend that present stage electronic product constantly develops toward lightening, high-performance, how at limited eyeglass number Under the premise of amount (such as the framework of five eyeglasses) to design optical length shorter and have the imaging lens of good aperture, Become an important topic in this technical field.

Summary of the invention

The technical problem to be solved in the present invention is, cannot take into account preferably optics for imaging lens of the prior art The defect of performance and shorter optical length, it is provided that a kind of imaging lens, reaches preferably optical property with shorter Optical length.

The technical solution adopted for the present invention to solve the technical problems is to provide a kind of imaging lens, from thing side (object Side) sequentially include to image side (image side): the first lens, the second lens (meniscus negative lens), Three lens (meniscus positive lens), the 4th lens and the 5th lens.First lens contain the non-of more than one side Sphere.Second lens have negative optical power, the second lens convex surface facing thing side and containing one side more than aspheric surface.The Three lens have positive optical power, and the concave surface of the 3rd lens is towards thing side and containing aspheric surface more than one side.4th lens tool Having negative optical power, the concave surface of the 4th lens is towards image side and containing aspheric surface more than one side.5th lens have positive optics Ability, the 5th lens convex surface facing thing side and containing one side more than aspheric surface.

In one embodiment of this invention, above-mentioned imaging lens further includes: aperture, is arranged at: from the thing of the first lens The surface of side, to the position between the surface of the image side of the first lens.

In one embodiment of this invention, the 5th above-mentioned lens have at least two point of inflexion.

In one embodiment of this invention, above-mentioned imaging lens has: rear lens focus length D_bf, and from the first lens The surface of thing side is set to optical full length D to the distance of image planes, meets:

0.25<D_bf/D。

In one embodiment of this invention, it is set to optical full length D from the distance of the thing side surface of the first lens to image planes, and Half image height of the image being positioned at image planes is ImaH, meets:

ImaH/D>0.59。

In one embodiment of this invention, the focal length of above-mentioned 4th lens is f4, and the focal length of the 5th lens is f5, meets:

$0.1<\left|\frac{f4}{f5}\right|<0.3.$

In one embodiment of this invention, above-mentioned imaging lens has focal distance f, and the first lens have focal distance f 1, meets:

$0.65<\left|\frac{f1}{f}\right|<0.85.$

In one embodiment of this invention, above-mentioned imaging lens has between focal distance f, and the first lens and the second lens It is spaced apart D12, meets:

$27<\frac{f}{D12}<195.$

In one embodiment of this invention, between above-mentioned first lens and the second lens, be spaced apart D12, the 3rd lens with It is spaced apart D34 between 4th lens, meets:

$1<\frac{D12}{D34}<7.$

In one embodiment of this invention, above-mentioned imaging lens has focal distance f, between the 4th lens and the 5th lens between It is divided into D45, meets:

$16<\frac{f}{D45}<26.$

Based on above-mentioned, the imaging lens of the present invention includes: first～the 5th lens, and each has the aspheric that one side is above Surface, face.It addition, imaging lens also can have: aperture and light-transmitting component.Set by the optical parametric meeting each optical module Meter so that the characteristic that imaging lens obtains the optical property of excellence, shorter optical length is bigger with aperture, and then can apply In the various camera models of the slimming of high picture element.

For the features described above of the present invention and advantage can be become apparent, special embodiment below, and coordinate accompanying drawing to make in detail Carefully it is described as follows.

Accompanying drawing explanation

Figure 1A is the schematic diagram of the imaging lens 100 of first embodiment of the invention.

Figure 1B is the curve chart of the curvature of field of imaging lens 100.

Fig. 1 C is the curve chart of the distortion of imaging lens 100.

Fig. 1 D is the curve chart of the lateral chromatic aberration of imaging lens 100.

Fig. 1 E is the curve chart of the longitudinal chromatic aberration of imaging lens 100.

Fig. 2 A is the schematic diagram of the imaging lens 200 of second embodiment of the invention.

Fig. 2 B is the curve chart of the curvature of field of imaging lens 200.

Fig. 2 C is the curve chart of the distortion of imaging lens 200.

Fig. 2 D is the curve chart of the lateral chromatic aberration of imaging lens 200.

Fig. 2 E is the curve chart of the longitudinal chromatic aberration of imaging lens 200.

Detailed description of the invention

[first embodiment]

Figure 1A is the schematic diagram of the imaging lens 100 of first embodiment of the invention.Refer to Figure 1A, imaging lens 100 from Thing side sequentially includes to image side: first lens the 110, second lens the 120, the 3rd lens the 130, the 4th lens 140 and the 5th are saturating Mirror 150, wherein, the first lens 110 are containing aspheric surface more than one side.Second lens 120 have negative optical power, the second lens The convex surface S3 of 120 is towards thing side and containing aspheric surface more than one side.3rd lens 130 have positive optical power, the 3rd lens The concave surface S5 of 130 is towards thing side and containing aspheric surface more than one side.4th lens 140 have negative optical power, the 4th lens The concave surface S8 of 140 is towards image side and containing aspheric surface more than one side.5th lens 150 have positive optical power, the 5th lens The convex surface S9 of 150 is towards thing side and containing aspheric surface more than one side.

Refer to Figure 1A, the first lens 110 can have positive refractive power, and the first lens 110 have: in the face of the surface of thing side S1 and the surface S2 in the face of image side, and in the middle of surface S1, S2, at least one side is aspheric surface.First lens 110 can be such as double Convex lens.

Second lens 120 are configured between the first lens 110 and image side, and the second lens 120 can have negative refractive power.The Two lens 120 have: in the face of thing side and the surface S3 that becomes convex surface and in the face of the surface S4 of image side, and in the middle of surface S3, S4 extremely Rare one side is aspheric surface.Second lens 120 can be such as crescent minus lens.

3rd lens 130 are configured between the second lens 120 and image side, and the 3rd lens 130 can have positive refractive power.The Three lens 130 have: in the face of thing side and the surface S5 that becomes concave surface and in the face of the surface S6 of image side, and in the middle of surface S5, S6 extremely Rare one side is aspheric surface.3rd lens 130 can be such as crescent plus lens.

4th lens 140 are configured between the 3rd lens 130 and image side, and the 4th lens 140 can have negative refractive power.The Four lens 140 have: surface S7 in the face of thing side and in the face of image side and become the surface S8 of concave surface, and in the middle of surface S7, S8 extremely Rare one side is aspheric surface.4th lens 140 can be such as minus lens.

5th lens 150 are configured between the 4th lens 140 and image side.5th lens 150 can have positive refractive power.The Five lens 150 have: in the face of thing side and the surface S9 that becomes convex surface and in the face of the surface S10 of image side, and in the middle of surface S9, S10 At least one side is aspheric surface.5th lens 150 can be such as plus lens.

By above-mentioned eyeglass arrangement mode, even if under the framework of five eyeglasses, imaging lens 100 still can be made Optical length effectively shortens and imaging lens 100 can have longer rear lens focus length.Consequently, it is possible to imaging lens 100 energy In enough camera models being assembled into high picture element, slimming easily.

Referring again to Figure 1A, imaging lens 100 may also include that aperture 115, is arranged at: from the thing side of the first lens 110 Surface S1, to the position between the surface S2 of the image side of the first lens 110.Aperture 115 is used to control to enter imaging lens 100 Light total amount.By the set-up mode of said aperture 115, the aperture 115 of imaging lens 100 can be made to become relatively big, and can reduce The time of shutter (shutter), to obtain and then the preferably quality of image.

Imaging lens 100 may also include that light-transmitting component 160, is positioned at the side of the image side of the 5th lens 150.Light-transmitting component 160 have: the surface S11 in the face of thing side and the surface S12 in the face of image side.Visual required optical effect, and at the 5th lens The side of the image side of 150 arranges light-transmitting component 160.Specifically, light-transmitting component 160 can be plate glass or filtering assembly (such as infrared ray filtering assembly) so that imaging light can pass through and filter the light of meeting interference images definition.Printing opacity group The material of part 160 can be plastics or other material being applicable to make light-transmitting component 160.

In imaging lens 100, first lens the 110, second lens 120, the 3rd lens 130, the 4th lens 140 and Five lens 150 at least any one, its material can use plastics or other be applicable to manufacture lens material.It addition, work as All of first lens the 110, second lens the 120, the 3rd lens the 130, the 4th lens 140 and the 5th lens 150 all use and mould When material makes, the weight of imaging lens 100 can be alleviated, and the cost of manufacture of imaging lens 100 can be reduced.

From the above, the first lens the 110, second lens the 120, the 3rd lens the 130, the 4th lens 140 and the 5th lens 150 aspheric surfaces all containing more than at least one side, thereby can obtain enough optics and control parameter, and then reach imaging lens The purpose of design that the optical length of 100 is shorter.

For example, refer to Figure 1A, in optical design, the 5th lens 150 can be made to have at least two point of inflexion；Change Yan Zhi, the 5th lens 150 can carry out turnover once or twice from center toward edge.Thereby can efficiently control the row of light Inbound path.Furthermore, the 5th lens 150 can have uniform thickness, consequently, it is possible to make the 5th lens 150 be prone to molding.It addition, Shape by these the 5th lens 150 so that imaging lens 100 can have less chief ray angle.

It is said that in general, make the image light of subject (not illustrating) image in the picture of image side end through imaging lens 100 On face 170.Photosensory assembly (not illustrating) can be set in image planes 170, such as: Charged Coupled Device (charge coupled Device, CCD), CMOS sensing component (complementary metal-oxide-semiconductor Sensor, CMOS sensor) etc., for sensing image light.Excellent optical property by above-mentioned imaging lens 100, it is possible to Image planes 170 are formed image clearly.

First lens the 110, second lens the 120, the 3rd lens 130 about imaging lens 100 described further below, 4th lens 140 and the optical design parameters of the 5th lens 150 and various possible enforcement kenel.By meeting following formula (1) spy that imaging lens 100 obtains the optical property of excellence, shorter optical length is bigger with aperture can～the condition of (7), be made Property.

Refer to Figure 1A, in imaging lens 100, from the surface S1 of the thing side of the first lens 110 to image planes 170, along The distance of optical axis OA is set to optical full length D；Further, from the surface S10 of the image side of the 5th lens 150 to image planes 170, along optical axis The distance of OA is set to rear lens focus length D_bf.It is to say, imaging lens 100 has: rear lens focus length D_bf, and from first The surface S1 of the thing side of lens 110 is set to optical full length D to the distance of image planes 170, meets the condition of formula (1):

0.25<D_bf/ D ... (1)

By meeting the condition of formula (1), burnt after imaging lens 100 can be made to have longer optics.

Referring again to Figure 1A, in imaging lens 100, when forming image in image planes 170, half image height of image is ImaH, and when the surface S1 of the thing side of the first lens 110 distance to image planes 170 is set to optical full length D, meet formula (2) Condition:

ImaH/D > 0.59 ... (2)

By meeting the condition of formula (2), be conducive to making imaging lens 100 have less volume, be conveniently used in corpusculum In long-pending camera model.

Additionally, refer to Figure 1A, in imaging lens 100, the focal length making the 4th lens 140 is f4, the 5th lens 150 Focal length is f5, and meets the condition of formula (3):

$0.1<\left|\frac{f4}{f5}\right|<0.3......\left(3\right)$

By meeting the condition of formula (3), the optical arrangement relation between the 4th lens 140 and the 5th lens 150 can be made to reach To optimization.

Furthermore, the focal length that the focal length of imaging lens 100 is set to f and the first lens 110 is f1, and meets the bar of formula (4) Part:

$0.65<\left|\frac{f1}{f}\right|<0.85......\left(4\right)$

By meeting the condition of formula (4), first lens 110 optical arrangement relation in imaging lens 100 can be made to reach Optimization.

Additionally, the focal length of imaging lens 100 to be set to f, and make the interval between the first lens 110 and the second lens 120 It is set to D12, and meets the condition of formula (5):

$27<\frac{f}{D12}<195.....\left(5\right)$

By meeting the condition of formula (5), the first lens 110 are made to join with second lens 120 optics in imaging lens 100 The relation of putting reaches optimization.

It addition, the interval between the first lens 110 and the second lens 120 to be set to D12, and by the 3rd lens 130 and Interval between four lens 140 is set to D34, meets the condition of formula (6):

$1<\frac{D12}{D34}<7......\left(6\right)$

By meeting the condition of formula (6), make the first lens 110 and the group of the second lens 120 and the 3rd lens 130 with Between the group of the 4th lens 140, the optical arrangement relation in imaging lens 100 reaches optimization.

Furthermore, make imaging lens 100 have focal distance f, between the 4th lens 140 and the 5th lens 150, be spaced apart D45, Meet the condition of formula (7):

$16<\frac{f}{D45}<26......\left(7\right)$

When meeting the optical condition of above-mentioned formula (1)～formula (7) according to optical design demand, imaging lens 100 can be made to obtain To the characteristic that excellent optical property, shorter optical length and aperture are bigger.Such as, imaging lens 100 can have 70 degree～ The field range of 75 degree；Imaging lens 100 can have the chief ray angle of 0～27.5 degree；And imaging lens 100 can have 2～3 F-number.

The related optical parameter of each optical module of the imaging lens 100 of first embodiment will be illustrated below.Should be noted Be, under address in table one, table two listed Data Data and be not limited to the present invention, those skilled in the art are with reference to this After invention, when can be to these parameters or be set for suitable change, but it must belong in the category of the present invention.

(table one)

In Table 1, spacing refers to: the air line distance between two adjacently situated surfaces, on optical axis OA.For example, surface S1 Spacing i.e. represent: the air line distance between surface S1 to surface S2, on optical axis OA (is the first lens 110 along optical axis The thickness of OA).

In Table 1, the focal length of imaging lens 100 is 3.828mm, and F-number is 2.05.Remarks column at table one In, (aperture the 115, first lens the 110, second lens the 120, the 3rd lens the 130, the 4th lens the 140, the 5th are saturating for each optical module Mirror 150, light-transmitting component 160) corresponding to spacing, refractive index and Abbe number, refer to each spacing, refractive index and Abbe in same column The numerical value that number is corresponding.In the design of imaging lens 100, the refractive index of each optical module and Abbe number are also important Optical Parametric Number, lists in the lump using as design reference in table one.Further, according to the same principle of the definition of above-mentioned spacing, can be analogized it The thickness along optical axis OA of its optical module.

Can be referring concurrently to Figure 1A, in Table 1, STOP represents aperture 115；Surface S 1, S2 are two tables of the first lens 110 Face；Surface S3, S4 are two surfaces of the second lens 120；Surface S5, S6 are two surfaces of the 3rd lens 130；Surface S7, S8 are Two surfaces of the 4th lens 140；Surface S9, S10 are two surfaces of the 5th lens 150；And surface S11, S12 are light-transmitting component Two surfaces of 160, wherein, the spacing of surface S12 is the surface S12 spacing to image planes 170.

First lens the 110, second lens the 120, the 3rd lens the 130, the 4th lens as aforementioned, in imaging lens 100 140, the 5th lens 150 are: can have the aspheric optical module that one side is above.In first embodiment, S1 ~ S10 all may be used For aspheric surface, and available formula (8) defines aspheric surface:

$Z=\frac{{\mathrm{ch}}^2}{1+{(1-(k+1)c^2{h}^2)}^{\frac{1}{2}}}+{\mathrm{Ah}}^4+{\mathrm{Bh}}^6+{\mathrm{Ch}}^8+{\mathrm{Dh}}^{10}+{\mathrm{Eh}}^{12}+{\mathrm{Fh}}^{14}+{\mathrm{Gh}}^{16}$ ... (8)

In formula (8), Z is the side-play amount (sag) in optical axis OA direction, and c is osculating sphere (osculating sphere) The inverse of radius, namely close to the inverse of the radius of curvature (such as the radius of curvature of S1 ~ S10 in table one) at optical axis OA.K is Quadratic surface coefficient.H is aspheric surface height, is the height toward rims of the lens from lens centre.A ~ G is asphericity coefficient (aspheric coefficient).Listed by table two is the parameter value of surface S1 ~ S10.

(table two)

Surface sequence number	k	A	B	C
					S1	-0.8954916	0.0242	0.01422	-0.01076
S2	-231.1665	0.060716	-0.12713	0.026144
					S3	-27.63517	0.036591	-0.02609	-0.11023
S4	-7.79272	0.12838	-0.02939	-0.02248
					S5	5.8213	-0.12136	0.091335	-0.06001
S6	-1.602019	0.021713	-0.05982	0.020687
					S7	0	0.021932	-0.00064	-0.00076
S8	-8.585397	-0.02242	0.000298	0.000621
					S9	-4.783519	-0.05717	0.002523	0.000647
S10	-4.821969	-0.06418	0.006998	-0.00069
					Surface sequence number	D	E	F	G
S1	-0.05565	0.120613	-0.09932	0.016345
					S2	-0.00189	-0.03671	0.061038	-0.03514
S3	0.012853	0.113169	-0.0493	-0.00525
					S4	0.009826	0.009093	0.056806	-0.0374
S5	0.056711	0.019083	-0.03535	0.011662
					S6	0.007709	0.001604	-0.00153	-0.00031
S7	0.000141	-1.22-E05	6.30E-07	0
					S8	-0.00015	9.94E-06	4.50E-08	0
S9	-2.31E-07	-4.26E-06	-1.53E-07	0

S10

0.000145

-9.74E-06

0

0

The imaging lens 100 utilizing Figure 1A carries out optical simulation, the relevant figure of the optical appearance of available Figure 1B～Fig. 1 E Shape.Figure 1B is the curve chart of the curvature of field (Field curvature) of imaging lens 100.Fig. 1 C is the distortion of imaging lens 100 (distortion) curve chart.Fig. 1 D is the curve chart of the lateral chromatic aberration (lateral color) of imaging lens 100.Fig. 1 E Curve chart for the longitudinal chromatic aberration (longitudinal color) of imaging lens 100.It may be noted that the longitudinal chromatic aberration of Fig. 1 E Curve chart depicts five curves, represents five different wavelengths of light respectively through longitudinal chromatic aberration produced by imaging len 100. By the figure gone out shown by above-mentioned Figure 1B～Fig. 1 E, it is known that: the imaging lens 100 of first embodiment can show good imaging Quality.

[the second embodiment]

Fig. 2 A is the schematic diagram of the imaging lens 200 of second embodiment of the invention.Refer to Fig. 2 A, imaging lens 200 with The imaging lens 100 of Figure 1A has similar structure.

Similarly, the imaging lens 200 of Fig. 2 A the most sequentially includes: first lens the 210, second lens 220, 3rd lens the 230, the 4th lens 240 and the 5th lens 250, wherein, the first lens 210 are containing aspheric surface more than one side. The convex surface S3 of the second lens 220 is towards thing side and containing aspheric surface more than one side.The concave surface S5 of the 3rd lens 230 is towards thing Side and containing the above aspheric surface of one side.The concave surface S8 of the 4th lens 240 is towards image side and containing aspheric surface more than one side. The convex surface S9 of the 5th lens 250 is towards thing side and containing aspheric surface more than one side.May also set up aperture 215 and light-transmitting component 260。

Further, about each optical module (aperture the 215, first lens 210, second lens the 220, the 3rd of imaging lens 200 Lens 230, the 4th lens 240, the 5th lens 250, light-transmitting component 260, image planes 270 etc.) optical parametric with relation is set, can With reference to the relevant narration (such as formula (1)～the condition of formula (7)) of first embodiment, do not repeated at this.

The related optical parameter of each optical module of the imaging lens 200 of the second embodiment will be illustrated below.Should be noted Be, under address in table three, table four listed data and be not limited to the present invention, those skilled in the art are with reference to the present invention Afterwards, when can be to these parameters or be set for suitable change, but it must belong in scope of the invention.

(table three)

In table three, spacing refers to: the air line distance between two adjacently situated surfaces, on optical axis OA.For example, surface S1 Spacing i.e. represent: the air line distance between the S2 of S 1 to surface, surface, on optical axis OA (is the first lens 210 along optical axis The thickness of OA).

In table two, the focal length of imaging lens 200 is 3.807mm, and F-number is 2.09.Remarks column at table three In, (aperture the 215, first lens the 210, second lens the 220, the 3rd lens the 230, the 4th lens the 240, the 5th are saturating for each optical module Mirror 250, light-transmitting component 260) corresponding to spacing, refractive index and Abbe number, refer to each spacing, refractive index and Abbe in same column The numerical value that number is corresponding.In the design of imaging lens 200, the refractive index of each optical module and Abbe number are also important Optical Parametric Number, lists in the lump using as design reference in table three.Further, according to the same principle of the definition of above-mentioned spacing, can be analogized it The thickness along optical axis OA of its optical module.

Can be referring concurrently to Fig. 2 A, in table three, STOP represents aperture 215；Surface S1, S2 are two tables of the first lens 210 Face；Surface S3, S4 are two surfaces of the second lens 220；Surface S5, S6 are two surfaces of the 3rd lens 230；Surface S7, S8 are Two surfaces of the 4th lens 240；Surface S8, S10 are two surfaces of the 5th lens 250；And surface S11, S12 are light-transmitting component Two surfaces of 260, wherein, the spacing of surface S12 is the surface S12 spacing to image planes 270.

First lens the 210, second lens the 220, the 3rd lens the 230, the 4th lens as aforementioned, in imaging lens 200 240, the 5th lens 250 are: can have the aspheric optical module that one side is above.In the second embodiment, S1 ~ S10 all may be used For aspheric surface, and formula (9) aspheric surface can be defined:

$Z=\frac{{\mathrm{ch}}^2}{1+{(1-(k+1)c^2{h}^2)}^{\frac{1}{2}}}+{\mathrm{Ah}}^4+{\mathrm{Bh}}^6+{\mathrm{Ch}}^8+{\mathrm{Dh}}^{10}+{\mathrm{Eh}}^{12}+{\mathrm{Fh}}^{14}+{\mathrm{Gh}}^{16}$ ... (9)

In formula (9), Z is the side-play amount in optical axis OA direction, and c is the inverse of the radius of osculating sphere, namely close to light The inverse of the radius of curvature (such as the radius of curvature of S1 ~ S10 in table three) at axle OA.K is quadratic surface coefficient.H is that aspheric surface is high Degree, is the height toward rims of the lens from lens centre.A ~ G is asphericity coefficient.Listed by table four is surface S1 ~ S10 Parameter value.

(table four)

Surface sequence number	k	A	B	C
					S1	-1.175345	0.015464	0.003219	-0.02388
S2	-80.15755	-0.04838	-0.04838	-0.04838
					S3	-176.1895	-0.03407	-0.05503	-0.04653
S4	-7.680402	0.055268	-0.01103	0.006041
					S5	0.7693534	-0.07861	0.071999	-0.09621
S6	-2.203558	-0.04325	-0.03126	0.023774
					S7	-68.91718	-0.01105	0.003002	-0.0006
S8	-7.44233	-0.00861	-0.00235	0.000541
					S9	-7.773262	-0.02895	0.00203	-1.62E-05
S10	-6.510229	-0.04374	0.005376	-0.00102
					Surface sequence number	D	E	F	G

S1	-0.05954	0.111205	-0.07904	0
					S2	-0.04838	-0.04838	-0.04838	-0.04838
S3	0.07084	0.101906	-0.08656	0
					S4	0.000772	0.014314	0.052891	-0.4452
S5	0.066516	0.017121	-0.04807	0.015459
					S6	-0.0026	0	0	0
S7	7.69E-05	-5.38-E06	0	0
					S8	-8.52E-05	-2.17E-07	0	0
S9	-8.95E-05	8.17E-06	5.07E-07	0
					S10	0.000133	-5.53E-06	1.32E-07	0

The imaging lens 200 utilizing Fig. 2 A carries out optical simulation, the relevant figure of the optical appearance of available Fig. 2 B～Fig. 2 E Shape.Fig. 2 B is the curve chart of the curvature of field of imaging lens 200.Fig. 2 C is the curve chart of the distortion of imaging lens 200.Fig. 2 D is imaging The curve chart of the lateral chromatic aberration of camera lens 200.Fig. 2 E is the curve chart of the longitudinal chromatic aberration of imaging lens 200.It may be noted that Fig. 2 E's The curve chart of longitudinal chromatic aberration depicts five curves, represents five different wavelengths of light respectively and produced through imaging len 200 Longitudinal chromatic aberration.By the figure gone out shown by above-mentioned Fig. 2 B～Fig. 2 E, it is known that: the imaging lens 200 of the second embodiment can show Go out good image quality.

In sum, the imaging lens of the present invention at least has the advantage that

Imaging lens includes: the first lens, the second lens, the 3rd lens, the 4th lens and the 5th lens, and each has The non-spherical surface that one side is above.Further, imaging lens also can have: aperture and light-transmitting component.By meeting each optics group The optical parameter design of part, and follow the arrangement mode of above-mentioned each optical module, imaging lens can be made to obtain the light of excellence Learn performance, characteristic that shorter optical length and aperture are bigger, and then the various cameras of slimming at high picture element can be applied In module, and reach preferable image quality.

Although the present invention is disclosed above with embodiment, but it is not limited to the present invention, those skilled in the art, Without departing from the spirit and scope of the present invention, when making a little change and retouching, therefore protection scope of the present invention is when regarding power Profit requires that defined person is as the criterion.

Claims (8)

1. an imaging lens, it is characterised in that the most sequentially include:

First lens, containing the aspheric surface that one side is above；

Second lens, have negative optical power, these the second lens convex surface facing this thing side and containing one side more than aspheric Face；

3rd lens, have positive optical power, and the concave surface of the 3rd lens is towards this thing side and containing aspheric more than one side Face；

4th lens, have negative optical power, and the concave surface of the 4th lens is towards this image side and containing aspheric more than one side Face；And

5th lens, have positive optical power, the 5th lens convex surface facing this thing side and containing one side more than aspheric Face；

It is spaced apart D12, being spaced apart between the 3rd lens and the 4th lens between these first lens and this second lens D34, meets:

Be set to optical full length D from the distance of this thing side surface of these the first lens to image planes, and be positioned at these image planes image half Image height is ImaH, meets:

ImaH/D>0.59。

2. imaging lens as claimed in claim 1, it is characterised in that further include:

Aperture, is arranged at: the surface from this thing side of these the first lens, this image side to these the first lens surface position Put.

3. imaging lens as claimed in claim 1, it is characterised in that the 5th lens have at least two point of inflexion.

4. imaging lens as claimed in claim 1, it is characterised in that this imaging lens has: rear lens focus length D_bf, and from The surface of this thing side of these the first lens is set to optical full length D to the distance of image planes, meets:

0.25<D_bf/D。

5. imaging lens as claimed in claim 1, it is characterised in that

The focal length of the 4th lens is f4, and the focal length of the 5th lens is f5, meets:

0.1<|f4/f5|<0.3。

6. imaging lens as claimed in claim 1, it is characterised in that this imaging lens has focal distance f, and these first lens have Focal distance f 1, meets:

7. imaging lens as claimed in claim 1, it is characterised in that this imaging lens has focal distance f, these first lens with should It is spaced apart D12 between second lens, meets:

8. imaging lens as claimed in claim 1, it is characterised in that this imaging lens has focal distance f, the 4th lens with should It is spaced apart D45 between 5th lens, meets: