CN105242374A

CN105242374A - Optical lens

Info

Publication number: CN105242374A
Application number: CN201410330477.6A
Authority: CN
Inventors: 陈荣耀
Original assignee: Ability Enterprise Co Ltd
Current assignee: Ability Enterprise Co Ltd
Priority date: 2014-07-11
Filing date: 2014-07-11
Publication date: 2016-01-13
Anticipated expiration: 2034-07-11
Also published as: CN105242374B

Abstract

An optical lens disclosed by the invention comprises a first lens with positive diopter, a second lens with negative diopter, a third lens with positive diopter, a fourth lens with negative diopter, a fifth lens with positive diopter and a sixth lens with negative diopter sequentially from the object side to the image-forming side. The optical lens satisfies the following condition: 0.65<ef1/TTL<0.8, wherein efl is the effective focal length of the optical lens, and TTL is the distance from the object side of the first lens to an imaging plane.

Description

Optical lens

Technical field

The present invention relates to a kind of optical lens, and in particular to a kind of volume the little and optical lens that image quality is good.

Background technology

Camera head, such as handheld communication system, digital camera, digital code camera or motion photography machine, mainly in conjunction with camera lens module and image sensor, be converted into the electronic signal of image, so that follow-up storage, process and transmission in order to converging beam.

The optical lens of camera head is normally made up of multi-disc eyeglass, in order to increase the competitive edge on market, and microminiaturized, high image quality and to reduce costs be the target of product development institute for pursuit always.

Therefore, need badly and propose a kind of new optical lens, under the prerequisite reducing manufacturing cost, realize optical lens miniaturization and the object promoting image quality simultaneously.

Summary of the invention

The object of the present invention is to provide a kind of optical lens.Under the prerequisite reducing manufacturing cost, realize optical lens miniaturization simultaneously and promote image quality.

According to one embodiment of the invention, a kind of optical lens is proposed.Optical lens sequentially comprises to image side from thing side: first lens, with positive diopter have negative dioptric second lens, one the 3rd lens, with positive diopter have negative dioptric 4th lens, one the 5th lens with positive diopter, and one has negative dioptric 6th lens.Optical lens meets the following conditions: 0.65<efl/TTL<0.8, and wherein, efl is the effective focal length of optical lens, and TTL is the distance of thing side to imaging surface from the first lens.

According to another embodiment of the present invention, a kind of optical lens is proposed.Optical lens sequentially comprises to image side from thing side: first lens, with positive diopter have negative dioptric second lens, one the 3rd lens, with positive diopter have negative dioptric 4th lens, one the 5th lens with positive diopter, and one has negative dioptric 6th lens, wherein the first lens have refractive index nd1 and Abbe number vd1, and nd1 and/or vd1 meets the following conditions: 1.5<nd1<1.95, and 35<vd1<70.

According to further embodiment of this invention, a kind of optical lens is proposed.Optical lens sequentially comprises to image side from thing side: first lens, with positive diopter have negative dioptric second lens, one the 3rd lens, with positive diopter have negative dioptric 4th lens, one the 5th lens with positive diopter, and one has negative dioptric 6th lens, wherein the 4th convex lens surface is towards the meniscus of thing side.

According to the present invention's more embodiment, a kind of optical lens is proposed.Optical lens sequentially comprises to image side from thing side: first lens, with positive diopter have negative dioptric second lens, one the 3rd lens, with positive diopter have negative dioptric 4th lens, one the 5th lens with positive diopter, and one has negative dioptric 6th lens, wherein the first lens are a glass lens.

Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.

Accompanying drawing explanation

Fig. 1 illustrates the optical lens according to the first embodiment of the present invention;

Fig. 2 A illustrates the curvature of field (fieldcurvature) curve map of the optical lens according to the first embodiment of the present invention;

Fig. 2 B illustrates distortion (distortion) curve map of the optical lens according to the first embodiment of the present invention;

Fig. 3 illustrates light fan map analysis (RayFan) simulation drawing according to the optical lens of the first embodiment of the present invention;

Fig. 4 illustrates optical lens according to a second embodiment of the present invention;

Fig. 5 A illustrates the curvature of field curve map of optical lens according to a second embodiment of the present invention;

Fig. 5 B illustrates the distortion curve figure of optical lens according to a second embodiment of the present invention;

Fig. 6 illustrates the light fan map analysis simulation drawing of optical lens according to a second embodiment of the present invention;

Fig. 7 illustrates optical lens according to the third embodiment of the invention;

Fig. 8 A illustrates the curvature of field curve map of optical lens according to the third embodiment of the invention;

Fig. 8 B illustrates the distortion curve figure of optical lens according to the third embodiment of the invention;

Fig. 9 illustrates the light fan map analysis simulation drawing of optical lens according to the third embodiment of the invention.

Embodiment

Below various embodiments of the present invention will be described in detail in detail, and coordinate accompanying drawing illustratively.Except these are described in detail, the present invention can also implement in other examples widely, and the substituting easily of any described embodiment, amendment, equivalence change are included in the scope of this case, and are as the criterion with right afterwards.In the description of instructions, in order to make reader have more complete understanding to the present invention, provide many specific detail; But the present invention under the prerequisite of clipped or whole these specific detail, still can may implement.In addition, well-known step or element are not described in details, to avoid the restriction causing the present invention unnecessary.In accompanying drawing, same or similar element will represent with identical or simileys.It is specifically intended that accompanying drawing is only the use of signal, be not size or the quantity of representation element reality, unless otherwise specified.

Fig. 1 illustrates the optical lens OL1 according to the first embodiment of the present invention.For manifesting the feature of the present embodiment, the structure that only display is relevant with the present embodiment, all the other structures are omitted.The optical lens OL1 of the present embodiment, can be applicable to have on a device of image projecting or acquisition function, such as, and handheld communication system, automobile-used pick-up lens, surveillance, digital camera, digital code camera or projector.

As shown in Figure 1, in the present embodiment, optical lens OL1 sequentially mainly comprises to image side (image-formingside) from thing side (objectside): a first lens L1, with positive diopter has negative dioptric second lens L2, one the 3rd lens L3, with positive diopter has negative dioptric 4th lens L4, one the 5th lens L5 with positive diopter, and one has negative dioptric 6th lens L6.

In embodiment, the diopter of the first lens L1 ~ the 6th lens L6 is with the interspersed arrangement of positive and negative staggered mode.

In embodiment, optical lens OL1 meets the following conditions:

0.65<efl/TTL<0.8

Wherein, efl is the effective focal length of optical lens OL1, and TTL is the distance of thing side to the imaging surface I from the first lens L1.Specifically, TTL is the distance of summit to the imaging surface I of first surface from the first lens L1.Wherein, first surface is equal to the surperficial code name S1 of table one, table three, table four, table six, table seven and table nine.

Moreover as shown in Figure 1, optical lens OL1 more comprises diaphragm St and optical filter F.Diaphragm St is arranged at the thing side of the first lens L1, can limit the luminous flux entering the first lens L1 according to this; Optical filter F is arranged between the 6th lens L6 and imaging surface I, can invisible light in filtering light beam, and wherein optical filter F can be an infrared fileter.In addition; the image acquisition unit that one has photoelectric converting function is set on imaging surface I; it can receive the light beam through optical filter F, and between imaging surface I and optical filter F, still has sheet glass C as the cover glass (coverglass) of image acquisition unit.

In an embodiment, at least one of the first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4, the 5th lens L5 and the 6th lens L6 can be non-spherical lens, and wherein each non-spherical lens has at least one non-spherical surface.Specifically, first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4, the 5th lens L5 and the 6th lens L6 can be non-spherical lens, and each non-spherical lens has at least one non-spherical surface, and each non-spherical surface can meet following mathematical expression:

Z = [\frac{(C * Y^{2})}{1 + \sqrt{1 - (K + 1) C^{2} Y^{2}}}] + Σ (A_{i} * Y^{i})

Wherein Z is the coordinate values in optical axis OA direction, take optical transmission direction as positive dirction, and A4, A6, A8, A10, A12 and A14 are asphericity coefficient, K is quadric surface constant, and C=1/R, R are radius-of-curvature, Y is the coordinate values being orthogonal to optical axis OA direction, take top as positive dirction.In addition, the parameters of the aspheric surface mathematical expression of each non-spherical lens or the value of coefficient can set respectively, to determine the focal length of each non-spherical lens.Via the setting of optical parametric, a non-spherical lens can be made to reach the optical effect being equivalent to two or more spherical lens, therefore the first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4, the 5th lens L5 and the 6th lens L6 are non-spherical lens and can reduce number of lenses in optical lens, also can reduce integral thickness, and then the size of whole optical lens is reduced.

In another embodiment, at least one of the first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4, the 5th lens L5 and the 6th lens L6 can be free-form surface lens, and wherein each free-form surface lens has at least one free form surface surface.Specifically, the first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4, the 5th lens L5 and the 6th lens L6 can be free-form surface lens, or are respectively non-spherical lens or free-form surface lens.Or at least one of the first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4, the 5th lens L5 and the 6th lens L6 can have a non-spherical surface and free form surface surface simultaneously, and not as limit.

In addition, in embodiment, first lens L1 can adopt glass lens, and the second lens L2, the 3rd lens L3, the 4th lens L4, the 5th lens L5 and the 6th lens L6 material can adopt plastic cement or glass, wherein, plastic cement material can comprise, but be not limited to, polycarbonate (polycarbonate), cyclic olefine copolymer (such as APEL), and vibrin (such as OKP4 or OKP4HT) etc., or be the composite material of at least one comprising aforementioned three.

In the present embodiment, as shown in Figure 1, first lens L1 is for convex surface is towards the meniscus of thing side, second lens L2 is biconcave lens, 3rd lens L3 is biconvex lens, 4th lens L4 is for convex surface is towards the meniscus of thing side, and the 5th lens L5 is for convex surface is towards the concave-convex lens of image side, and the 6th lens L6 is for convex surface is towards the meniscus of thing side.

Moreover optical lens OL1 also can meet the following conditions:

1.5<nd1<1.95 and 35<vd1<70

Wherein, nd1 is the refractive index of the first lens L1, and vd1 is the Abbe number of the first lens L1.

Moreover optical lens OL1 also can meet the following conditions:

1.6<Fno<2.2

Wherein, Fno is the aperture-coefficient of optical lens OL1.In one embodiment, the aperture-coefficient of optical lens OL1 can between 1.6 and 11.Specifically, the aperture-coefficient of optical lens OL1 is the multi-sectional stop between 1.8 to 11.

Moreover optical lens OL1 also can meet the following conditions:

15mm<TTL<18mm

Table one is listed according to the detailed data of the present invention as an embodiment of the optical lens OL1 of Fig. 1, and it comprises the effective focal length, radius-of-curvature, thickness, refractive index, abbe number etc. of each lens.Wherein the surperficial code name of eyeglass is from the sequentially layout of thing side to image side, such as: " S1 " represents the surface of the first lens L1 towards thing side, " S2 " represent the first lens L1 towards the surface of image side, " S " represent diaphragm surface, " S13 " and " S14 " represents thing side surface and the surface, image side of optical filter F respectively, and the thing side of sheet glass C and surface, image side are " S15 " and " S16 " etc. respectively.In addition, " thickness " represent this surface with adjacent to the distance on surface, image side one, such as, the distance that " thickness " of surperficial S1 is surperficial S1 and surperficial S2, the distance that " thickness " of surperficial S2 is surperficial S2 and surperficial S3.

Table one

Effective focal length	Lens code name	Surface code name	Radius-of-curvature (mm)	Thickness (mm)	Refractive index nd	Abbe number vd
							S	∞	0.1
24.15	L1	S1	8.538	1.17	1.85	40
							S2	13.616	0.64
-13.7	L2	S3	-37.808	0.45	1.61	26.65
							S4	10.837	0.2

7.33	L3	S5	8.223	2.89	1.535	57
							S6	-6.619	0.1
-23.19	L4	S7	7.736	1.37	1.64	24
							S8	4.735	2.67
6.4	L5	S9	-27.026	2.44	1.535	57
							S10	-3.136	0.27
-5.2	L6	S11	-93.453	0.95	1.535	57
							S12	2.897	1.05
	F	S13	∞	0.3	1.5233	54.517
							S14	∞	0.4
	C	S15	∞	0.5	1.5167	64.167
							S16	∞	1.2
		I	∞

Table two lists the focal distance f of the above embodiment of the present invention, f-number FNO, visual angle half-angle ω (halfangleview), image height Y and total lens length TTL.

Table two

Parameter
		f(mm)	11.9
FNO	1.85
		ω(°)	32.9
Y(mm)	8
		TTL(mm)	16.4

In addition, the all surface of the first lens L1 in above-described embodiment ~ the 6th lens L6, that is surperficial code name is " S1 ", " S2 ", " S3 ", " S4 ", " S5 ", " S6 ", " S7 ", " S8 ", " S9 ", " S10 ", " S11 " and " S12 " person, each term coefficient in its aspheric surface mathematical expression as shown in Table 3.

Table three

K

A4

A6

A8

A10

A12

A14

S1

-9.61

0.0012

-9.595e-5

6.236e-6

-3.756e-7

1.425e-8

0

S2

0

-0.000854

-4.1834e-5

1.7561e-5

-1.3581e-6

3.62e-8

0

S3

-44.74554

0.001193

-9.144e-5

6.472e-6

-4.15e-7

-1.2525e-8

0

S4

2.981823

0.001234

-6.816e-5

-3.177e-6

2.980e-8

1.719e-9

0

S5

0

-0.001038

-2.470e-5

3.5952e-6

-2.063e-7

3.568e-9

0

S6

-10.5108

-0.00303

0.0001286

-8.939e-6

3.2e-7

-6.6e-9

0

S7

-1.021439

-0.0009023

4.1594e-5

-2.4416e-7

-6.682e-9

-8.021e-10

0

S8

-5.519108

0.002447086

-0.00012675082

8.0085112e-6

-2.1787441e-7

1.8467446e-9

0

S9

-3.885656

0.0003165

-0.0001261

1.1283e-5

-6.9186e-7

1.8303e-8

-1.866e-010

S10

-6.748573

-0.001632

-0.00014

2.298e-5

-1.294e-6

2.536e-8

-3.213e-11

S11

0

-0.0055

-0.000169

4.7655e-5

-3.2e-6

9.046e-8

-8.894e-10

S12

-7.198051

-0.00434

0.0002174

-7.4581e-6

1.324e-7

-1.03253e-9

1.2604e-12

Fig. 2 A illustrates the curvature of field (fieldcurvature) curve map of optical lens OL1 according to a first embodiment of the present invention.Wherein, curve T, S difference display optical camera lens OL1 is for the aberration of tangent light beam (TangentialRays) with sagittal beam (SagittalRays).Tangent curvature of field value that wavelength is the light beam of 436nm, 546nm and 656nm is shown and Sagittal field curvature value all controls in good scope in figure.

Fig. 2 B illustrates distortion (distortion) curve map according to the optical lens OL1 of the first embodiment of the present invention.Showing wavelength in figure is that the aberration rate of the light beam of 436nm, 546nm and 656nm all controls in (-0.5% ,+0.5%) scope.

Fig. 3 illustrates light fan map analysis (RayFan) simulation drawing according to the optical lens OL1 of the first embodiment of the present invention.Wherein, the many groups simulated data in Fig. 3 is simulated with the light beam of three kinds of different wave lengths (being respectively 436nm, 546nm and 656nm) according to different image height Y and obtains respectively.

Fig. 4 illustrates optical lens OL2 according to a second embodiment of the present invention.The structure of the optical lens OL2 of second embodiment of the invention, roughly the same with the optical lens OL1 of the first embodiment shown in Fig. 1, Main Differences is in formation eyeglass, and particularly the first lens L1 is different with the characteristic of the second lens L2.Illustrate with example below and do not exist together, exist together mutually and can continue to use previous explanation, repeat no more.

Furthermore, in the present embodiment, as shown in Figure 4, the first lens L1 of optical lens OL2 is positive biconvex lens, and the second lens L2 is for convex surface is towards the negative meniscus of thing side.

Table four is listed according to the detailed data of the present invention as an embodiment of the optical lens OL2 of Fig. 4, and it comprises the effective focal length, radius-of-curvature, thickness, refractive index, abbe number etc. of each lens.Wherein each code name is identical with previous embodiment, repeats no more in this.

Table four

Table five lists the focal distance f of the above embodiment of the present invention, f-number FNO, visual angle half-angle ω (halfangleview), image height Y and total lens length TTL, and table six lists each term coefficient in the aspheric surface mathematical expression of all surface of the first lens L1 ~ the 6th lens L6 in above-described embodiment.

Table five

Parameter

f(mm)	11.9
		FNO	1.85
ω(°)	32.9
		Y(mm)	8
TTL(mm)	16.3

Table six

K

A4

A6

A8

A10

A12

A14

A16

S1

-14.77751

0.000616513

-0.0001022

1.06e-7

5.37e-8

-7.16e-9

4.77e-10

0

S2

0

0.001057971

-0.0002778

1.77e-5

-8.70e-7

2.22e-8

3.00e-10

0

S3

9.981192

-0.001221668

-0.000116

1.49e-5

-9.76e-7

2.86e-8

7.47e-11

0

S4

-4.36996

-0.000905178

5.043e-5

3.67e-7

-2.16e-7

6.32e-9

5.66e-11

0

S5

-5.040972

0.000260241

-7.08e-5

7.68e-6

-3.47e-7

1.03e-8

-1.59e-10

0

S6

-13.42125

-0.001954462

0.0001266

-7.81e-6

2.20e-7

-2.07e-9

1.64e-11

0

S7

-1.730793

-0.000992721

6.701e-5

-2.35e-6

3.47e-8

-9.51e-10

3.41e-11

-2.3e-12

S8

-6.222496

0.001496533

-0.0001122

8.65e-6

-3.83e-7

7.01e-9

8.39e-11

-4.7e-12

S9

-2.085693

0.002514296

-0.000277

2.98e-5

-1.67e-6

4.52e-8

-6.51e-10

3.85e-15

S10

-5.536593

-0.000487966

-5.094e-5

2.02e-5

-1.01e-6

1.85e-8

-1.89e-10

8.25e-13

S11

0

-0.002302029

-0.000274

5.09e-5

-3.63e-6

1.26e-7

-1.72e-9

-9.4e-13

S12

-8.788302

-0.00282851

0.0001279

-4.40e-6

8.29e-8

-7.83e-10

2.41e-12

-1.0e-14

Fig. 5 A illustrates the curvature of field curve map of optical lens OL2 according to a second embodiment of the present invention.Wherein, curve T, S respectively display optical camera lens OL2 for the aberration of tangent light beam and sagittal beam.Tangent curvature of field value that wavelength is the light beam of 436nm, 546nm and 656nm is shown and Sagittal field curvature value all controls in good scope in figure.

Fig. 5 B illustrates the distortion curve figure of optical lens OL2 according to a second embodiment of the present invention.Showing wavelength in figure is that the aberration rate of the light beam of 436nm, 546nm and 656nm all controls in (-0.5% ,+0.5%) scope.

Fig. 6 illustrates the light fan map analysis simulation drawing of optical lens OL2 according to a second embodiment of the present invention.Wherein, the many groups simulated data in Fig. 6 is simulated with the light beam of three kinds of different wave lengths (being respectively 436nm, 546nm and 656nm) according to different image height Y and obtains respectively.

Specifically, it is the abbe number of 24 that the second lens L2 due to the optical lens OL2 of the present embodiment has negative diopter, refractive index higher than 1.60 and essence, after the first lens L1 that collocation has positive diopter and the 3rd lens L3, there is the effect that better aberration improves.

Fig. 7 illustrates optical lens OL3 according to the third embodiment of the invention.The structure of the optical lens OL3 of third embodiment of the invention, roughly the same with the optical lens OL1 of the first embodiment shown in Fig. 1, Main Differences is in formation mirror picture, and particularly the first lens L1 is different with the characteristic of the second lens L2.Illustrate with example below and do not exist together, exist together mutually and can continue to use previous explanation, repeat no more.

In the present embodiment, as shown in Figure 7, the first lens L1 of optical lens OL3 is for convex surface is towards the meniscus of thing side, and the second lens L2 is for convex surface is towards the meniscus of thing side.

Table seven is listed according to the detailed data of the present invention as an embodiment of the optical lens OL3 of Fig. 7, and it comprises the effective focal length, radius-of-curvature, thickness, refractive index, abbe number etc. of each lens.Wherein each code name is identical with previous embodiment, repeats no more in this.

Table seven

Effective focal length	Lens code name	Surface code name	Radius-of-curvature (mm)	Thickness (mm)	Refractive index	Abbe number
							S	∞	-0.05
19.05	L1	S1	8.61	0.92	1.62	64
							S2	30.25	0.10
-20.85	L2	S3	4.48	0.40	1.61	26.65
							S4	3.21	0.76
7.92	L3	S5	20.00	2.28	1.535	57
							S6	-5.18	0.10
-16.78	L4	S7	5.98	0.85	1.64	24
							S8	3.63	2.14
6.12	L5	S9	-10.30	1.92	1.535	57
							S10	-2.65	0.15
-5.34	L6	S11	-168.01	1.59	1.535	57
							S12	2.92	1.14
	F	S13	∞	0.30	1.5233	54.517
							S14	∞	0.40

C

S15

∞

0.50

1.5167

64.167

S16

∞

1.20

I

∞

Table eight lists the focal distance f of the above embodiment of the present invention, f-number FNO, visual angle half-angle ω (halfangleview), image height Y and total lens length TTL, and table nine lists each term coefficient in the aspheric surface mathematical expression of all surface of the first lens L1 ~ the 6th lens L6 in above-described embodiment.

Table eight

Parameter
		f(mm)	10.62
FNO	1.88
		ω(°)	37.3
Y(mm)	8
		TTL(mm)	14.74

Table nine

	K	A4	A6	A8	A10	A12	A14	A16
									S1	-6.32	0.001132	-0.000207	-4.32e-6	5.37e-8	-2.65e-8	0	0
S2	0.00	0.00230	-0.00058	2.38e-5	-1.51e-6	4.77e-8	0	0
									S3	-7.88	-0.00192	-0.000195	2.12e-5	-2.01e-6	6.13e-8	0	0
S4	-4.54	-0.00149	-0.000103	1.82e-5	-1.69e-6	4.79e-8	0	0
									S5	0.00	0.000434	-0.000257	1.37e-5	-2.68e-7	6.44e-9	0	0
S6	-10.35	-0.00336	0.000090	1.23e-6	-5.17e-7	2.00e-8	0	0
									S7	-0.41	-0.00503	0.000216	-4.47e-6	9.90e-8	-6.50e-9	0	0
S8	-5.66	0.000822	-0.000158	1.31e-5	-4.90e-7	5.10e-9	0	0
									S9	2.34	0.00282	-0.000233	2.80e-5	-1.56e-6	9.95e-9	8.52e-10	0
S10	-4.24	-0.00193	-0.000057	2.51e-5	-1.18e-6	-1.78e-8	1.42e-9	0
									S11	0.00	-0.00369	-0.000279	6.02e-5	-4.58e-6	1.53e-7	-1.9e-9	0
S12	-7.31	-0.00383	0.000200	-7.71e-6	1.61e-7	-1.73e-9	7.16e-12	0

Fig. 8 A illustrates the curvature of field curve map of optical lens OL3 according to the third embodiment of the invention.Wherein, curve T, S respectively display optical camera lens OL3 for the aberration of tangent light beam and sagittal beam.Tangent curvature of field value that wavelength is the light beam of 436nm, 546nm and 656nm is shown and Sagittal field curvature value all controls in good scope in figure.

Fig. 8 B illustrates the distortion curve figure of optical lens OL3 according to the third embodiment of the invention.Showing wavelength in figure is that the aberration rate of the light beam of 436nm, 546nm and 656nm all controls in (-0.5% ,+0.5%) scope.

Fig. 9 illustrates the light fan map analysis simulation drawing of optical lens OL3 according to the third embodiment of the invention.Wherein, the many groups simulated data in Fig. 9 is simulated with the light beam of three kinds of different wave lengths (being respectively 436nm, 546nm and 656nm) according to different image height Y and obtains respectively.

From Fig. 2 A to Fig. 3, Fig. 5 A to Fig. 6 and Fig. 8 A to Fig. 9, the spherical aberration of optical lens OL1, OL2, OL3 of the present embodiment, the curvature of field, distortion all can obtain well-corrected, and light fan map analysis data also drop in the scope of standard.Therefore, according to embodiments of the invention, optical lens OL1, OL2, OL3 can reducing costs, under the condition of miniaturization, produce the image of high-quality of high-res, low aberration.

Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.

Claims

1. an optical lens, it is characterized in that, sequentially comprise to image side from thing side: first lens, with positive diopter have negative dioptric second lens, one the 3rd lens, with positive diopter have negative dioptric 4th lens, one the 5th lens with positive diopter, and one has negative dioptric 6th lens, this optical lens meets the following conditions:

0.65<efl/TTL<0.8，

Wherein, efl is the effective focal length of this optical lens, and TTL is the distance of thing side to imaging surface from these the first lens.

2. an optical lens, it is characterized in that, sequentially comprise to image side from thing side: first lens, with positive diopter have negative dioptric second lens, one the 3rd lens, with positive diopter have negative dioptric 4th lens, one the 5th lens with positive diopter, and one has negative dioptric 6th lens, these first lens have refractive index nd1 and Abbe number vd1, and nd1 and/or vd1 meets the following conditions:

1.5<nd1<1.95, and

35<vd1<70。

3. an optical lens, it is characterized in that, sequentially comprise to image side from thing side: first lens, with positive diopter have negative dioptric second lens, one the 3rd lens, with positive diopter have negative dioptric 4th lens, one the 5th lens with positive diopter, and one has negative dioptric 6th lens, the 4th lens are the meniscus of a convex surface towards thing side.

4. the optical lens according to claim 1,2 or 3, is characterized in that, these first lens are glass lens.

5. an optical lens, it is characterized in that, sequentially comprise to image side from thing side: first lens, with positive diopter have negative dioptric second lens, one the 3rd lens, with positive diopter have negative dioptric 4th lens, one the 5th lens with positive diopter, and one has negative dioptric 6th lens, these first lens are a glass lens.

6. the optical lens according to claim 1,2 or 5, is characterized in that, the 4th lens are the meniscus of a convex surface towards thing side.

7. the optical lens according to claim 1,2,3 or 5, is characterized in that, at least one of these first lens, these second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens is a non-spherical lens.

8. the optical lens according to claim 1,3 or 5, is characterized in that, these first lens have refractive index nd1, and 1.5<nd1<1.95.

9. the optical lens according to claim 1,3 or 5, is characterized in that, these first lens have Abbe number vd1, and 35<vd1<70.

10. the optical lens according to claim 1,2,3 or 5, is characterized in that, this optical lens also meets the following conditions: 1.6<Fno<2.2, and wherein, Fno is the aperture-coefficient of this optical lens.

11. optical lens according to claim 1,2,3 or 5, it is characterized in that, this optical lens also meets the following conditions: 15mm<TTL<18mm.

12. optical lens according to claim 1,2,3 or 5, is characterized in that, these first lens are a biconvex lens or the convex surface meniscus towards thing side, and/or these second lens are a biconcave lens or the convex surface meniscus towards thing side.

13. optical lens according to claim 1,2,3 or 5, it is characterized in that, the 3rd lens are a biconvex lens, and the 5th lens are the meniscus of a convex surface towards image side, and the 6th lens are the meniscus of a convex surface towards image side.