CN103605201B

CN103605201B - Optical lens

Info

Publication number: CN103605201B
Application number: CN201310584281.5A
Authority: CN
Inventors: 叶孙华
Original assignee: ALAUD OPTICAL (XIAMEN) Co Ltd
Current assignee: ALAUD OPTICAL (XIAMEN) Co Ltd
Priority date: 2013-11-20
Filing date: 2013-11-20
Publication date: 2016-08-17
Anticipated expiration: 2033-11-20
Also published as: CN103605201A

Abstract

The invention discloses a kind of high-resolution optical camera lens being applied to the field such as web camera, monitoring, it is sequentially comprised to image side by thing side: one first lens, is the meniscus lens with negative power；One second lens, are the lens of concave-concave or the plano-concave with negative power；One the 3rd lens, are the biconvex lens with positive light coke；One diaphragm, one the 4th lens, be the biconcave lens with negative power；One the 5th lens, are the biconvex lens with positive light coke；One the 6th lens, are the biconvex lens with positive light coke；4th lens and the 5th lens be focal power be positive balsaming lens group, 4th lens high-refractivity and low-dispersion glass, its refractive index Nd>1.75, abbe number Vd<28,5th lens L5 high-dispersion glass, 65>Vd>47, wherein Nd represents the refractive index of lens material d light, and Vd represents the d light Abbe constant of lens material.Can preferable calibration aberration, definition can be effectively improved, make the definition of whole system can reach 5 mega pixels.

Description

Optical lens

Technical field

The present invention relates to a kind of optical lens, refer in particular to a kind of high score being applied to the field such as web camera, monitoring Resolution optical lens.

Background technology

Along with telecommunication network faced monitoring and the rapid emergence in tradition monitoring market, significantly carrying of network transfer speeds in recent years Rise and the development of various digital processing, the quality requirements of imaging is significantly promoted.From commonly seeing that image monitoring is to high definition Clear picture catching demand.Just require that camera lens quality can reach high-resolution requirement.

Summary of the invention

It is an object of the invention to provide a kind of application coordinating web camera, improve image definition and periphery image quality is equal Even property, overcomes the high-resolution optical camera lens of the low weakness of conventional lenses performance indications simultaneously.

For achieving the above object, the solution of the present invention is:

A kind of high-resolution optical camera lens, it sequentially comprises to image side by thing side: one first lens, are to have negative power Meniscus lens；One second lens, are the lens of concave-concave or the plano-concave with negative power；One the 3rd lens, are to have positive light The biconvex lens of focal power；One diaphragm, one the 4th lens, be the biconcave lens with negative power；One the 5th lens, are just to have The biconvex lens of focal power；One the 6th lens, are the biconvex lens with positive light coke；4th lens and the 5th lens are that light is burnt Degree is positive balsaming lens group, the 4th lens high-refractivity and low-dispersion glass, its refractive index Nd>1.75, abbe number Vd<28, 5th lens L5 high-dispersion glass, 65 > Vd > 47, wherein Nd represents the refractive index of lens material d light, and Vd represents lens material D light Abbe constant.

It is aperture diaphragm between described 3rd lens and the 4th lens.

Described first lens meet following condition: Nd>1.55, Vd<63, and wherein Nd represents the refractive index of lens material d light, Vd represents the d light Abbe constant of lens material.

Described second lens meet following condition: 1.7 > Nd > 1.55, and wherein Nd represents the refractive index of lens material d light.

Described 3rd lens meet following condition: Nd>1.70, Vd<30, wherein Nd represents the refractive index of lens material d light, Vd represents the d light Abbe constant of lens material.

Described 5th lens meet following condition: 1.75 > Nd > 1.60, and wherein Nd represents the refractive index of lens material d light.

Described 6th lens meet following condition: 1.75 > Nd > 1.60,65 > Vd > 47, and wherein Nd represents lens material d light Refractive index, Vd represents the d light Abbe constant of lens material.

The focal range of described whole group of camera lens is between 6.0mm ~ 8.0mm.

Described 5th between lens and the 6th lens, it is provided with vignetting stop.

After using such scheme, invention feature is as follows:

Owing to camera lens the 4th lens of the present invention and the 5th lens are balsaming lens groups, the 4th lens high-refractivity and low-dispersion Glass, its refractive index Nd>1.75, abbe number Vd<28, the 5th lens L5 high-dispersion glass, 65>Vd>47, can preferably calibration Aberration, can be effectively improved definition, makes the definition of whole system can reach 5 mega pixels.

And the space between the 5th lens and the 6th lens arranges vignetting stop, can effectively stop the veiling glare shadow to system Ring.

Lens design image height of the present invention is 7.50mm, can well be used for 1/2.5 " in the video camera of 5MegaPixel.With Time can be used for that low side is a little 1/2.7 " 2MegaPixel and 1/3 " video camera of 3MegaPixel.

Accompanying drawing explanation

Fig. 1 is optical system schematic diagram of the present invention；

Fig. 2 is optical system chromatic curve figure of the present invention；

Fig. 3 is optical system distortion curve figure of the present invention；

Fig. 4 is optical system MTF curve figure of the present invention.

Detailed description of the invention

Below in conjunction with accompanying drawing explanation embodiments of the present invention:

As shown in Figures 1 to 4, present invention is disclosed a kind of high-resolution optical camera lens, this camera lens is depended on to image side by thing side Sequence comprises: one first lens L1, is the meniscus lens with negative power；One second lens L2, is have negative power double Recessed or the lens of plano-concave；One the 3rd lens L3, is the biconvex lens with positive light coke；One diaphragm 7, the 4th lens L4, be There is the biconcave lens of negative power；One the 5th lens L5, is the biconvex lens with positive light coke；One the 6th lens L5, be There is the biconvex lens of positive light coke；4th lens L4 and the 5th lens L5 be focal power be positive balsaming lens group, the 4th lens L4 high-refractivity and low-dispersion glass, its refractive index Nd>1.75, abbe number Vd<28, the 5th lens L5 high-dispersion glass, 65>Vd>47。

Described first lens L1 meets following condition: Nd>1.55, Vd<63；Second lens L2 meets following condition: 1.7 >Nd>1.55；3rd lens L3 meets following condition: Nd>1.70, Vd<30；5th lens L5 meets following condition: 1.75 > Nd>1.60；6th lens L6 meets following condition: 1.75 > Nd > 1.60,65 > Vd > 47；The focal range of whole group of camera lens exists Between 6.0mm ~ 8.0mm.

Wherein Nd represents the refractive index of lens material d light, and Vd represents the d light Abbe constant of lens material.

And the diaphragm between described 3rd lens L3 and the 4th lens L4 is aperture diaphragm.

Further between the 5th lens L5 and the 6th lens L6, it is provided with vignetting stop 8, can effectively stop veiling glare to system Impact.

Owing to the 4th saturating L4 and the 5th lens L5 is balsaming lens group, the 4th lens L4 high-refractivity and low-dispersion glass, Its refractive index Nd>1.75, abbe number Vd<28, the 5th lens L5 high-dispersion glass, 65>Vd>47, can preferable calibration aberration, Definition can be effectively improved, make the definition of whole system can reach 5 mega pixels.

The present embodiment f=8.0 lens parameters table is as follows:

Face sequence number	Radius of curvature	Center thickness	Refractive index Nd	Abbe number Vd	Effective aperture
						1	5.591836	2.03	1.70	56.2	8.36
2	3.310196	3.86			5.73
						3	-25.77357	0.60	1.59	61.2	4.42
4	5.381746	0.20			4.08
						5	6.625025	1.40	1.85	23.8	4.08
6	-19.68596	0.01			3.78
						Diaphragm	Infinity	1.054			3.70
8	-13.83783	0.66	1.92	18.9	3.80
						9	8.407386	3.00	1.70	56.2	4.05
10	-5.934336	1.80			5.00
						11	14.82904	1.44	1.70	56.2	6.54
12	-71.0128	6.37			6.62
						13	Infinity	0.70	1.51	64.2	7.20
14	Infinity	2.85			7.25
						Image planes	Infinity				7.50

Therein sequence number: 1-2 is the first lens L1；3-4 is the second lens L2；

5-6 is the 3rd lens L3；8-9 is the 4th lens L4；

9-10 is the 5th lens L5；11-12 is the 6th lens L6；

13-14 is protection glass (see the label 9 of Fig. 1)；

Image planes (see the label 10 of Fig. 1).

Therefore, this lens design image height is 7.50mm, can well be used for 1/2.5 " in the video camera of 5MegaPixel. Be simultaneously available for that low side is a little 1/2.7 " 2MegaPixel and 1/3 " video camera of 3MegaPixel.

Claims

1. an optical lens, it is characterised in that: it is sequentially comprised to image side by thing side: one first lens, is to have negative light Jiao The meniscus lens of degree,<63, the Nd1 refractive indexes representing the first lens material d light, Vd1 represents the first lens material for Nd1>1.55, Vd1 The d light Abbe constant of material；One second lens, are the lens of concave-concave or the plano-concave with negative power；One the 3rd lens, are to have The biconvex lens of positive light coke, the thing flank radius of described 3rd lens is 6.625025mm, image side surface radius of curvature for- 19.68596mm；One diaphragm；One the 4th lens, are the biconcave lens with negative power；One the 5th lens, are to have positive light Jiao The biconvex lens of degree；One the 6th lens, are the biconvex lens with positive light coke；4th lens and the 5th lens constitute focal power For positive balsaming lens group, the 4th lens use high-refractivity and low-dispersion glass, and<28, Nd4 represent that the 4th is saturating for Nd4>1.75, Vd4 The refractive index of mirror material d light, Vd4 represents the d light Abbe constant of the 4th lens material；5th lens L5 high-dispersion glass, 65 > Vd5 > 47, Vd5 represent the d light Abbe constant of the 5th lens material；Between lens and the 6th lens, it is provided with vignetting light at the 5th Door screen.

2. optical lens as claimed in claim 1, it is characterised in that: it is aperture light between described 3rd lens and the 4th lens Door screen.

3. as claimed in claim 1 optical lens, it is characterised in that: the second lens meet following condition: 1.7 > Nd2 > 1.55, its In, Nd2 represents the refractive index of the second lens material d light.

4. as claimed in claim 1 optical lens, it is characterised in that: the 3rd lens meet following condition: Nd3>1.70, Vd3< 30, wherein Nd3 represents the refractive index of the 3rd lens material d light, and Vd3 represents the d light Abbe constant of the 3rd lens material.

5. as claimed in claim 1 optical lens, it is characterised in that: the 5th lens meet following condition: 1.75 > Nd5 > 1.60, Wherein Nd5 represents the refractive index of the 5th lens material d light.

6. as claimed in claim 1 optical lens, it is characterised in that: the 6th lens meet following condition: 1.75 > Nd6 > 1.60, 65 > Vd6 > 47, wherein Nd6 represents the refractive index of the 6th lens material d light, and Vd6 represents that the d light Abbe of the 6th lens material is normal Number.

7. as claimed in claim 1 optical lens, it is characterised in that: the focal range of whole group of camera lens 6.0mm～8.0mm it Between.