CN205958829U

CN205958829U - Three lens camera lens and camera device

Info

Publication number: CN205958829U
Application number: CN201620484927.1U
Authority: CN
Inventors: 郭瑞雄
Original assignee: GESONG OPTICAL TECHNOLOGY Co Ltd
Current assignee: Weifang Goertek Optical Technology Co ltd; Goertek Optical Technology Co Ltd
Priority date: 2016-05-25
Filing date: 2016-05-25
Publication date: 2017-02-15
Anticipated expiration: 2026-05-25

Abstract

The utility model discloses a three lens camera lens and camera device, these three lens camera lens is included by thing side to picture side in proper order: the first lens that have a positive refractive power of falcate, the second lens that have a positive refractive power of falcate, the corrugated third lens that have negative optical power. This camera device includes three above -mentioned lens camera lens the utility model discloses a camera lens has the characteristic of great wide angle, low sensitivity and high formation of image quality.

Description

Three lens pick-up lenss and camera head

Technical field

This utility model is related to pick-up lenss, more specifically, this utility model is related to a kind of three lens pick-up lenss and tool There is the camera head of this kind three lens pick-up lenss.

Background technology

Now with smart mobile phone front-facing camera module configuration requirement from 1,300,000 pixels of iphone4, iphone5s's 2000000 pixels step up to 5,000,000 pixel level it is desirable to visual angle reaches more than 80 degree, and on market, generally popular satisfaction will That asks has two kinds of structures：Preposition diaphragm and middle diaphragm, both structures respectively have drawback it is difficult to promote.

Preposition diaphragm MTF (modulation transfer function (MTF)) better performances, but sensitivity is higher, and individual lenses assembling bias requires little In 1 μm, general molding factory precision does not reach this requirement, leads to camera lens factory group to found yield relatively low.Middle diaphragm sensitivity is low, but MTF performance is bad, does not reach the target of user expectation.

Accordingly, it would be desirable to a kind of new lens construction is so that ensure Radix Rumiciss, low sensitivity and the good spy of MTF performance simultaneously Point.

Utility model content

A purpose of the present utility model is to solve existing camera lens can not meet Radix Rumiciss, low sensitivity and MTF simultaneously The good feature of energy.For this reason, this utility model provides a kind of new lens construction, i.e. three lens pick-up lenss.

According to of the present utility model in a first aspect, providing a kind of three lens pick-up lenss it is characterised in that by thing side to picture Side includes successively：First lens with positive light coke of falcate；Second lens with positive light coke of falcate；Wave 3rd lens with negative power of shape；

Preferably, three lens pick-up lenss meet：V2-V3>25；0.839≤tanθ≤0.965；2.2≤fno≤2.4； 1.85≤f≤2；f1/f2>1.5；ImgH/TTL≤0.65；

Wherein, θ is the half of the angle of visual field of described camera lens, and TTL is the camera lens overall length of described camera lens, and ImgH is described mirror The half of head effective pixel area diameter on imaging surface, f1 is the focal length of described first lens, and f2 is described second lens Focal length, f is the effective focal length of the lens combination being made up of described first lens, described second lens, described 3rd lens, and V2 is The Abbe number of the second lens, V3 is the Abbe number of the 3rd lens, and fno is f-number.

Preferably, three lens pick-up lenss can also include the aperture light being arranged between object and described first lens Door screen.

Preferably, three lens pick-up lenss can also include being arranged at as the optical filter and described 3rd lens between.

Preferably, described first lens, described second lens and described 3rd lens are all made of plastics.

Preferably, described first lens, described second lens, the aspheric surface configuration of described 3rd lens can expire Sufficient below equation：

According to second aspect of the present utility model, there is provided a kind of camera head is it is characterised in that include as new in this practicality Three lens pick-up lenss described in the first aspect of type, and there are the imaging apparatuss of the pixel count of below 8,000,000 pixels.

One of the present utility model has technical effect that, employs new lens construction, can ensure Radix Rumiciss, hypoallergenic simultaneously Sensitivity and the good advantage of MTF performance.

By the detailed description to exemplary embodiment of the present utility model referring to the drawings, other of the present utility model Feature and its advantage will be made apparent from.

Brief description

Constitute the Description of Drawings of a part the embodiment of the present utility model of description, and use together with the description In explanation principle of the present utility model.

Fig. 1 is the schematic diagram of the three lens pick-up lenss embodiments that this utility model provides.

Fig. 2 is the curvature of field of three lens pick-up lenss embodiments and the distortion curve schematic diagram of this utility model embodiment.

Fig. 3 is the MTF- frequency curve schematic diagram of three lens pick-up lenss embodiments of this utility model embodiment.

Fig. 4 is the ratio chromatism, curve synoptic diagram of three lens pick-up lenss embodiments of this utility model embodiment.

Specific embodiment

To describe various exemplary embodiment of the present utility model now with reference to accompanying drawing in detail.It should be noted that：Unless it is another Illustrate outward, the positioned opposite, numerical expression of the part otherwise illustrating in these embodiments and step and numerical value do not limit Make scope of the present utility model.

Description only actually at least one exemplary embodiment is illustrative below, never as to this practicality Any restriction that is new and its applying or use.

May be not discussed in detail for technology and equipment known to person of ordinary skill in the relevant, but in suitable situation Under, described technology and equipment should be considered a part for description.

In all examples with discussion shown here, any occurrence should be construed as merely exemplary, and not It is as restriction.Therefore, other examples of exemplary embodiment can have different values.

It should be noted that：Similar label and letter represent similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined in individual accompanying drawing, then do not need it is further discussed in subsequent accompanying drawing.

As shown in figure 1, three lens pick-up lenss have the of positive light coke by what thing side to image side included falcate successively One lens, falcate there are the second lens of positive light coke and corrugated 3rd lens with negative power.

Three lens pick-up lenss meet：

V2-V3>25；

0.839≤tanθ≤0.965；

2.2≤fno≤2.4；

1.85≤f≤2；

f1/f2>1.5；

ImgH/TTL≤0.65.

Wherein, θ is the half of the angle of visual field of described camera lens, and TTL is the camera lens overall length of described camera lens, and ImgH is described camera lens The half of effective pixel area diameter on imaging surface, f1 is the focal length of described first lens, and f2 is Jiao of described second lens Away from f is the effective focal length of the lens combination being made up of described first lens, described second lens, described 3rd lens, and V2 is the The Abbe number of two lens, V3 is the Abbe number of the 3rd lens, and fno is f-number.

0.839≤tan θ≤0.965 ensure that camera lens has the larger angle of visual field.

f1/f2>1.5 reasonable distribution that ensure that the first lens and the second power of lens, are conducive to improving camera lens Resolution.

ImgH/TTL≤0.65 is conducive to the miniaturization of pick-up lenss.

2.2≤fno≤2.4 explanation F-number is larger, sensitivity (acceptable tolerance such as i.e. eccentric, thickness and radius of curvature) Relatively low, so that image quality is higher.

V2-V3>25 ensure that larger Abbe number difference so that the effect of color difference eliminating is preferable.

Three lens pick-up lenss can also include the aperture diaphragm being arranged between object and the first lens, and setting And as the optical filter and the 3rd lens between.

First lens, the second lens and the 3rd lens can be made of plastics.

The aspheric surface configuration of the first lens, the second lens and the 3rd lens generally meets below equation：

Wherein, h be in aspheric surface arbitrary point to the height of optical axis, c is vertex curvature, and k is conic constants, A_iIt is aspheric surface The correction factor of the i-th-th.

Three lens pick-up lenss include the thing side S1 and image side surface S2 of the first lens E1, the second lens by thing side to image side The thing side S5 and image side surface S6 of the thing side S3 of E2 and image side surface S4, the 3rd lens E3.Light through three lens pick-up lenss Line images in imaging surface S9 by optical filter E4.Optical filter E4 includes thing side S7 and image side surface S8.Diaphragm can be arranged at Between the thing side S1 of one lens E1 and thing, diaphragm is not shown in figure.

In the present embodiment, three lens pick-up lenss meet following parameter：

TTL=3.046；

F1=3.264；

F2=1.889；

F3=-2.582；

V2-V3=32.61；

ImgH/TTL=0.595；

Tan θ=0.93；

F1/f2=1.73；

Fno=2.2.

Three lens pick-up lenss also meet Tables 1 and 2：

Table 1

Surface sequence number	Surface type	Radius of curvature	Thickness	Material	Effective diameter	Circular cone coefficient
								Sphere	Infinite	500	924.1016	0
S1	Aspheric surface	1.454478	0.3427369	1.544/56.11	1.178778	1.134315
							S2	Aspheric surface	7.258679	0.437	1.314908	0
S3	Aspheric surface	-3.161344	0.9471062	1.544/56.11	1.610453	13.2795
							S4	Aspheric surface	-0.8597175	0.1	2.054981	-0.6041088
S5	Aspheric surface	1.034093	0.3533966	1.640/23.5	2.509374	-6.013138
							S6	Aspheric surface	0.5524938	0.35	3.228697	-2.772148
S7	Sphere	Infinite	0.21	1.517/64.17	3.329156	0
							S8	Sphere	Infinite	0.3061314	3.444665	0
S9	Sphere	Infinite	0		3.613161	0

Table 2

Fig. 2 is the curvature of field and the distortion curve schematic diagram of the present embodiment, and Fig. 3 is that the MTF- frequency curve of the present embodiment is illustrated Figure, Fig. 4 is the ratio chromatism, curve synoptic diagram of the present embodiment.

It can be seen that three lens pick-up lenss of the present utility model are in the case of meeting big Radix Rumiciss and miniaturization Higher image quality still can be kept.

This utility model additionally provides a kind of camera head, including three lens pick-up lenss of the present utility model, and tool There are the imaging apparatuss of the pixel count of below 8,000,000 pixels.

Although being described in detail to some specific embodiments of the present utility model by example, this area It is to be understood by the skilled artisans that above example is merely to illustrate, rather than in order to limit scope of the present utility model.This Field it is to be understood by the skilled artisans that can be in the case of without departing from scope and spirit of the present utility model, to above example Modify.Scope of the present utility model is defined by the following claims.

Claims

1. a kind of three lens pick-up lenss are it is characterised in that included successively to image side by thing side：

First lens with positive light coke of falcate；

Second lens with positive light coke of falcate；

Corrugated 3rd lens with negative power；

Described three lens pick-up lenss meet：

V2-V3>25；

0.839≤tanθ≤0.965；

2.2≤fno≤2.4；

1.85≤f≤2；

f1/f2>1.5；

ImgH/TTL≤0.65

Wherein, θ is the half of the angle of visual field of described camera lens, and TTL is the camera lens overall length of described camera lens, and ImgH takes the photograph for described three lens As the half of camera lens effective pixel area diameter on imaging surface, f1 is the focal length of described first lens, and f2 is saturating for described second The focal length of mirror, f is the effective focal length of the lens combination being made up of described first lens, described second lens, described 3rd lens, V2 is the Abbe number of described second lens, and V3 is the Abbe number of described 3rd lens, and fno is f-number.

2. three lens pick-up lenss according to claim 1 it is characterised in that also include are arranged at object and described the Aperture diaphragm between one lens.

3. three lens pick-up lenss according to claim 1 are it is characterised in that also include being arranged at as saturating with the described 3rd Optical filter between mirror.

4. three lens pick-up lenss according to claim 1 are it is characterised in that described first lens, described second lens And described 3rd lens are all made of plastics.

5. three lens pick-up lenss according to claim 1 are it is characterised in that described first lens, described second saturating Mirror, the aspheric surface configuration of described 3rd lens meet below equation：

6. a kind of camera head is it is characterised in that include three lens camera lens as described in any one in claim 1 to 5 Head；And there are the imaging apparatuss of the pixel count of below 8,000,000 pixels.