CN106959499A

CN106959499A - Optical lens

Info

Publication number: CN106959499A
Application number: CN201610015325.6A
Authority: CN
Inventors: 林盈秀; 王国权
Original assignee: Young Optics Inc
Current assignee: Young Optics Inc
Priority date: 2016-01-11
Filing date: 2016-01-11
Publication date: 2017-07-18
Anticipated expiration: 2036-01-11
Also published as: CN106959499B

Abstract

The present invention provides a kind of optical lens, including the first lens group and the second lens group.First lens group is located between Zoom Side and reduced side.First lens group includes three lens, the second lens towards the surface of reduced side be convex aspheric surface.Second lens group includes three lens.At least respectively there is a non-spherical lens among first lens group and the second lens group.The optical lens of the present invention possesses Wide-angle, and can provide good optical quality.

Description

Optical lens

Technical field

The present invention relates to a kind of optical module, more particularly to a kind of optical lens.

Background technology

With the progress of modern video technology, digital camera (digital video camera, DVC) and The device for image such as digital camera (digital camera, DC) have been commonly used, and are widely used In each field.One of core component in these device for image is camera lens, and it is to by image definition Image on screen or Charged Coupled Device (Charge Coupled Device, CCD).In addition, near Nian Lai wisdom family monitoring video camera has more and more booming trend, and people are for slimming and light Learn the requirement also more and more higher of performance.The camera lens of such demand is met, wide field is generally needed to have Angle, miniaturization, slimming, high resolution, large aperture, low distortion, it is day and night confocal the features such as.

Therefore, how to make one to possess These characteristics and the camera lens of good optical qualities can be provided, be One of important topic of current those skilled in the art.

The content of the invention

The present invention provides a kind of optical lens, possesses Wide-angle, and can provide good optical qualities.

A kind of optical lens of the present invention includes the first lens group and the second lens group.First lens group position Between Zoom Side and reduced side.First lens group includes the first lens arranged by Zoom Side to the small side And second lens.Second lens towards the surface of reduced side be convex surface.It is saturating that second lens group is located at first Between lens group and reduced side.Second lens group includes the 3rd lens.Optical lens meet FOV >=160 degree, F<2.0 and 4<L/H<6 condition.FOV is the angle of visual field of optical lens, and L is the first lens direction The surface of Zoom Side is to the overall length of reduced side imaging plane, and H is the image height of reduced side imaging plane, F For F-number.

Based on above-mentioned, in the exemplary embodiment of the present invention, the design of optical lens meets the condition of acquiescence Standard, therefore tool Wide-angle, and good optical qualities can be provided.

For the features described above and advantage of the present invention can be become apparent, special embodiment below, and coordinate Accompanying drawing is described in detail below.

Brief description of the drawings

Figure 1A is the schematic diagram of the optical lens of one embodiment of the invention；

Figure 1B, Fig. 1 C and Fig. 1 D emulate datagram for the image optics of Figure 1A optical lens；

Fig. 2A is the schematic diagram of the optical lens of another embodiment of the present invention；

Fig. 2 B, Fig. 2 C and Fig. 2 D emulate datagram for the image optics of Fig. 2A optical lens；

Fig. 3 A are the schematic diagrams of the optical lens of another embodiment of the present invention；

Fig. 3 B, Fig. 3 C and Fig. 3 D emulate datagram for the image optics of Fig. 3 A optical lens；

Fig. 4 A are the schematic diagrams of the optical lens of another embodiment of the present invention；

Fig. 4 B, Fig. 4 C and Fig. 4 D emulate datagram for the image optics of Fig. 4 A optical lens.

Reference：

100、200、300、400：Optical lens

110、210、310、410：First lens group

112、212、312、412：First lens

114、214、314、414：Second lens

116、216、316、416：4th lens

118、218、318：7th lens

120、220、320、420：Second lens group

122、222、322、422：5th lens

124、224、324、424：6th lens

126、226、326、426：3rd lens

130、330、430：Glass cover

140、240、340、440：Imaging plane

A：Optical axis

OS：Zoom Side

IS：Reduced side

S：Aperture

S1、S2、S3、S4、S5、S6、S7、S8、S9、S10、S11、S12、S13、S14、 S15：Surface

Embodiment

For the present invention foregoing and other technology contents, feature and effect, in following cooperation refer to the attached drawing Multiple embodiments detailed description in, can clearly present.The direction being previously mentioned in following examples Term, is only the direction of refer to the attached drawing such as " on ", " under ", "front", "rear", "left", "right". Therefore, the direction term used is for illustrating, rather than for limiting the present invention.

Figure 1A is the schematic diagram of the optical lens of one embodiment of the invention.Figure 1A is refer to, this The optical lens 100 of embodiment is located between Zoom Side OS and reduced side IS.Optical lens 100 includes First lens group 110 and the second lens group 120.First lens group 110 is located at Zoom Side OS and second Between lens group 120.Second lens group 120 is located between the first lens group 110 and reduced side IS, light Circle S is configured between the first lens group 110 and the second lens group 120, the first lens group 110 and the Optical axis A arrangement of two lens groups 120 along optical lens 100.

In the present embodiment, the first lens group 110 includes the arranged from Zoom Side OS to reduced side IS The 112, second lens of one lens (L1) (L2) the 114, the 4th lens (L4) 116 and the 7th lens (L7) 118, its Brightness in the wrong is respectively negative, negative, negative, positive.Second lens group 120 is included from Zoom Side OS to reduced side The lens (L6) 124 of the 5th lens (L5) the 122, the 6th and the 3rd lens (L3) 126 of IS arrangements, it bends bright Degree is sequentially negative, positive, just.In one embodiment, after optical lens 100 is completed, first is saturating The coupling of mirror 112 one is suitable to the rubber washer (O-Ring) of waterproof.

In the present embodiment, the first lens 112 are glass lens.Second lens, the 4th lens and the 3rd Lens are non-spherical lens.In other words, among the first lens group 110 and the second lens group 120 extremely It is few respectively to have a non-spherical lens.In the present embodiment, the 5th lens and the balsaming lens of the 6th lens forming one. Second lens 114 towards reduced side IS surface S4 be convex aspheric surface.

In the present embodiment, optical lens 100 meets following condition (1) to (3)：

FOV >=160 degree (1)

F<2 (2)

4<L/H<6 (3)

Wherein, the angles of visual field of the FOV for optical lens 100 or the maximum field of view angle in dimension, L is light The overall length of camera lens 100 is learned, is the surface S1 of upper first lens 112 of optical axis A to reduced side imaging plane 140 distance, H is the image height of reduced side imaging plane, and F is F-number.Consequently, it is possible to meet The optical lens 100 of above-mentioned condition, it can be ensured that its quality of optical imaging, and with good optical characteristics.

In the present embodiment, glass cover 130 and image sensor can be set in reduced side IS, and it is imaged flat Face is denoted as 140.Glass cover 130 is located between the second lens group 120 and imaging plane 140.Glass Lid 130 has two surface S14 and surface S15.The formation image of optical lens 100 is in imaging plane On 140.

Herein below will be enumerated specifically to be counted in optical lens 100 shown by Figure 1A on each lens According to.

(table one)

In Table 1, spacing refers between two adjacent surfaces in the air line distance on optical axis A.For example, Surface S1 spacing, i.e. surface S1 between the S2 of surface in the air line distance on optical axis A.Remember in table one What is carried is thickness, refractive index and the Abbe number corresponding to each lens, and what remarks column was recorded is corresponding each Mirror.In addition, in Table 1, surface S1, surface S2 are two surfaces of the first lens 112, surface S3, Surface S4 is two surfaces of the second lens 114, and surface S5, surface S6 are two tables of the 4th lens 116 Face, surface S7, surface S8 are two surfaces of the 7th lens 118, and surface S9 is the 5th lens 122 Surface, surface S10 is the surface that is connected with the 6th lens 124 of the 5th lens 122, and surface S11 is the Six lens 124 are towards reduced side IS surface, and surface S12, surface S13 are the two of the 3rd lens 126 Surface.

In the present embodiment, surface S3, surface S4, surface S5, surface S6, surface S12, surface S13 is aspherical, and its available following equation (4) is represented：

In above-mentioned formula, Z is the offset (sag) in optical axis A directions, and c is osculating sphere (osculating Sphere the inverse of radius), that is, close to the radius of curvature (S3 to S6 in such as table one at optical axis A And S12 to S13 radius of curvature) inverse.K is quadratic surface coefficient (conic), and r is aspheric Face is the height from lens centre toward rims of the lens highly, and A₂、A₄、A₆、A₈、A₁₀、A₁₂、 A₁₄、A₁₆... it is asphericity coefficient (aspheric coefficient), in the present embodiment coefficient A₂For 0.Under Table two lists surface S3 to S6 and S12 to S13 parameter value.

(table two)

	k	A₄	A₆	A₈
					S3	-0.29	9.95E-03	-3.86E-04	1.87E-05
S4	-0.46	1.06E-02	-8.42E-04	3.11E-04
					S5	4.39E-03	-5.26E-04	9.47E-05	4.39E-03
S6	5.73E-04	-2.15E-04	1.81E-04	5.73E-04
					S12	-0.76	-3.11E-04	-3.90E-04	2.09E-04
S13	7.49	3.70E-03	-1.23E-03	5.72E-04
						A₁₀	A₁₂	A₁₄	A₁₆
S3	2.95E-06	-9.34E-07	1.16E-07	-5.08E-09
					S4	-1.45E-04	4.88E-05	-8.75E-06	6.53E-07
S5	9.14E-05	-4.02E-05	7.11E-06	-4.27E-07
					S6	-6.37E-05	1.21E-05	-1.12E-06	4.05E-08
S12	-5.59E-05	8.89E-06	-7.34E-07	2.64E-08
					S13	-1.50E-04	2.26E-05	-1.79E-06	6.16E-08

Hold above-mentioned, in the optical lens 100 of the present embodiment, f-number (F-Number, Fno) 2.0, 185 degree of the angle of visual field (field of view, FOV), camera lens overall length L (total track length, TTL) 18 Millimeter, camera lens overall length L and the image height H of reduced side imaging plane ratio L/H 5.9.

Following embodiments continue to use the reference numerals and partial content of previous embodiment, wherein using identical mark Number represent identical or approximate component, and eliminate the explanation of constructed content.On omission portion The explanation divided refers to previous embodiment, and it is no longer repeated for following embodiments.

Fig. 2A is the schematic diagram of the optical lens of another embodiment of the present invention.Refer to Figure 1A and Fig. 2A, main difference for example exists between the two for the optical lens 200 of the present embodiment and optical lens 100 Have in the second lens 214 and just bend brightness, the 6th lens 224 are recessed towards reduced side IS surface S11 Face.

Herein below will be enumerated specifically to be counted in optical lens 200 shown by Fig. 2A on each lens According to.

(table three)

Each optical parametric and the Explanation way of data can refer to the explanation of table one in table three.In the present embodiment, Surface S3, surface S4, surface S5, surface S6, surface S12, surface S13 are aspherical, and it can Represented with above-mentioned formula (4).Following table four lists surface S3 to S6 and surface S12 to S13 parameter Value.In the present embodiment, coefficient A₂、A₁₀、A₁₂、A₁₄、A₁₆For 0.

(table four)

	k	A₄	A₆	A₈
					S3	0	3.04E-03	-4.78E-05	-2.75E-06
S4	0	4.79E-03	-3.87E-04	1.69E-05
					S5	0	9.70E-03	-6.91E-04	8.57E-05
S6	0	1.97E-03	1.25E-04	1.29E-06
					S12	0	-3.54E-03	-1.17E-05	0
S13	0	5.37E-04	-7.89E-05	0

Hold above-mentioned, in the optical lens 200 of the present embodiment, f-number 2.0,164 degree of the angle of visual field, mirror 20 millimeters of overall length of head, camera lens overall length L and the image height H of reduced side imaging plane ratio L/H 5.9.

Fig. 3 A are the schematic diagrams of the optical lens of another embodiment of the present invention.Refer to Figure 1A and Fig. 3 A, main difference for example exists between the two for the optical lens 300 of the present embodiment and optical lens 100 It is spherical lens in the 4th lens 316, the second lens 314 towards Zoom Side OS surface S3 are convex surface, Surface S4 towards reduced side IS is concave surface, and the 4th lens 316 towards Zoom Side OS surface S5 are Convex surface, the surface S6 towards reduced side IS is concave surface, table of the 5th lens 322 towards Zoom Side OS Face S9 is concave surface.

Herein below will be enumerated specifically to be counted in optical lens 300 shown by Fig. 3 A on each lens According to.

(table five)

Each optical parametric and the Explanation way of data can refer to the explanation of table one in table five.In the present embodiment, Surface S3, surface S4, surface S12, surface S13 are aspherical, and it can use above-mentioned formula (4) to represent. Following table six lists surface S3 to S4 and surface S12 to S13 parameter value.

(table six)

	k	A₄	A₆	A₈
					S3	-6.86	0.55	1.92	18.90
S4	3	2.20	1.88	40.77
					S12	-1.24E-03	3.31E-04	1.38E-05	-1.24E-03
S13	1.78E-03	3.49E-04	-1.16E-05	1.78E-03
						A10	A12	A14	A16
S3	5.12E-07	0	0	0
					S4	-1.26E-05	0	0	0
S12	9.21E-07	0	0	0
					S13	8.16E-06	0	0	0

Hold above-mentioned, in the optical lens 300 of the present embodiment, f-number 2.0,190 degree of the angle of visual field, mirror 18 millimeters of overall length of head, camera lens overall length L and the image height H of reduced side imaging plane ratio L/H5.9.

Fig. 4 A are the schematic diagrams of the optical lens of another embodiment of the present invention.Refer to Figure 1A and Fig. 4 A, main difference for example exists between the two for the optical lens 400 of the present embodiment and optical lens 100 In the first lens group 410 of optical lens 400 be to include three lens, its bend brightness be respectively it is negative, negative, Just, the second lens group 420 includes three lens, and it is respectively positive and negative, just that it bends brightness, the second lens 414 towards reduced side IS surface S4 be concave surface, surface S8 of the 5th lens 422 towards reduced side IS For concave surface.

Herein below will be enumerated specifically to be counted in optical lens 400 shown by Fig. 4 A on each lens According to, it should be noted that, the Data Data listed by table one to table eight is not limited to the present invention, Ren Hesuo Belong in technical field those of ordinary skill after with reference to the present invention, when can do appropriate to its parameter or setting Change, it should belong in scope of the invention.

(table seven)

Each optical parametric and the Explanation way of data can refer to the explanation of table one in table seven.In the present embodiment, Surface S3, surface S4, surface S5, surface S6, surface S10, surface S11 are aspherical, and it can Represented with above-mentioned formula (4).Following table eight lists surface S3 to S6 and surface S10 to S11 parameter Value.

(table eight)

Hold above-mentioned, in the optical lens 400 of the present embodiment, f-number 2.3,170 degree of the angle of visual field, mirror 19.76 millimeters of overall length of head, camera lens overall length L and the image height H of reduced side imaging plane ratio L/H5.9。

Figure 1B -1D, Fig. 2 B-2D, Fig. 3 B-3D and Fig. 4 B-4D be Figure 1A, Fig. 2A, Fig. 3 A and The image optics emulation datagram of Fig. 4 A optical lens.Wherein, Figure 1B, Fig. 2 B, Fig. 3 B and figure 4B is transverse light rays sector diagram (transverse ray fan plot), and the X-axis in figure passes through light for light S position is enclosed, Y-axis is projected to the position of image plane (such as imaging plane 440) for light.Herein Respectively using wavelength as the green of 855 nanometers of coloured light, the feux rouges that wavelength is 656 nanometers, 588 nanometers of wavelength The blue light of 486 nanometers of light and wavelength is simulated as with reference to wave band.Fig. 1 C, Fig. 2 C, Fig. 3 C and Fig. 4 C show the figure of the curvature of field (field curvature), and Fig. 1 D, Fig. 2 D, Fig. 3 D and Fig. 4 D show Show the figure of distortion (distortion) and be using wavelength simulated by 588nm light come.At this In four embodiments of invention, optical lens is small relative to the focus offset of visible ray and near infrared light, It can be referred to as day and night confocal.Because the figure gone out shown by foregoing each figure is in the range of standard, therefore The optical lens of the embodiment of the present invention can be in Wide-angle, miniaturization, slimming, high resolution, big light Circle, low distortion and it is day and night confocal in the case of there is provided good image quality.

In summary, in the exemplary embodiment of the present invention, the design of optical lens meets the condition of acquiescence Standard, thus the present invention exemplary embodiment optical lens can Wide-angle, miniaturization, slimming, High resolution, large aperture, low distortion and it is day and night confocal in the case of there is provided good image quality.

Although the present invention is disclosed as above with embodiment, so it is not limited to the present invention, any affiliated Those of ordinary skill in technical field, it is without departing from the spirit and scope of the present invention, a little when that can make Change with retouching, therefore protection scope of the present invention ought be defined depending on appended claims confining spectrum.

Claims

1. a kind of optical lens, it is characterised in that including：

One first lens group, between a Zoom Side and a reduced side, including by the Zoom Side to institute One first lens and one second lens of reduced side arrangement are stated, second lens are towards the reduced side Surface be convex surface；And

One second lens group, between first lens group and the reduced side, including one the 3rd saturating Mirror,

Wherein described optical lens meets FOV >=160 degree, F<2.0 and 4<L/H<6 condition, FOV For the angle of visual field of the optical lens, L is that first lens contract towards the surface of the Zoom Side to one The overall length of small side imaging plane, H is an image height of the reduced side imaging plane, and F is F-number.

2. optical lens according to claim 1, it is characterised in that second lens with it is described 3rd lens are non-spherical lenses.

3. a kind of optical lens, it is characterised in that including：

One first lens group, between a Zoom Side and a reduced side, including by the Zoom Side to institute One first lens and one second lens of reduced side arrangement are stated, second lens are aspherical；And

One second lens group, between first lens group and the reduced side, including one the 3rd saturating Mirror, the 3rd lens to be aspherical,

Wherein described optical lens meets FOV >=160 degree, F<2.0 and 4<L/H<6 condition, FOV Be the optical lens at the maximum field of view angle of dimension, L is first lens towards the Zoom Side Surface to a reduced side imaging plane overall length, H be the reduced side imaging plane an image height, F is F-number.

4. a kind of optical lens, it is characterised in that including：

Wherein described optical lens meets FOV >=160 degree, F≤2.3 and L<20 millimeters of condition, FOV Be the optical lens at the maximum field of view angle of dimension, L is first lens towards the Zoom Side Surface to the overall length of a reduced side imaging plane, F is F-number.

5. optical lens according to any one of claim 1 to 4, it is characterised in that described One lens are glass lens.

6. optical lens according to any one of claim 1 to 4, it is characterised in that described One lens couple a rubber washer, and it is suitable to waterproof.

7. the optical lens according to any one of claim 2 to 4, it is characterised in that described One lens group also includes one the 4th lens, and it is located between second lens and second lens group, And the 4th lens are that non-spherical lens and the 3rd lens are flat to be imaged near the reduced side The lens in face.

8. optical lens according to claim 7, it is characterised in that second lens and described 4th lens, its material is plastics.

9. optical lens according to claim 7, it is characterised in that two lens group also includes One balsaming lens of one the 5th lens and one the 6th lens composition.

10. optical lens according to claim 9, it is characterised in that first lens group is also Including one the 7th lens, between the 4th lens and second lens group.