CN107765402A - Camera optical camera lens - Google Patents

Camera optical camera lens Download PDF

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Publication number
CN107765402A
CN107765402A CN201711144064.9A CN201711144064A CN107765402A CN 107765402 A CN107765402 A CN 107765402A CN 201711144064 A CN201711144064 A CN 201711144064A CN 107765402 A CN107765402 A CN 107765402A
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China
Prior art keywords
lens
camera
focal length
camera optical
optical camera
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CN201711144064.9A
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CN107765402B (en
Inventor
王建明
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Chengrui Optics Changzhou Co Ltd
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AAC Acoustic Technologies Shenzhen Co Ltd
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Priority to CN201711144064.9A priority Critical patent/CN107765402B/en
Publication of CN107765402A publication Critical patent/CN107765402A/en
Priority to JP2018140841A priority patent/JP6498824B1/en
Priority to US16/102,034 priority patent/US10606026B2/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The present invention relates to field of optical lens, discloses a kind of camera optical camera lens, and it is sequentially included by thing side to image side：Aperture, the first lens, the second lens, the 3rd lens, the 4th lens, and the 5th lens；The camera optical camera lens meets following relationship：0.75<f1/f<0.80,‑2.0<f2/f<‑1.9,‑7<f3/f<‑6,0.5<f4/f<0.6,‑0.5<f5/f<‑0.4.The camera optical camera lens takes into account low TTL and larger image height while with excellent optical properties, and can be applied to the Portable image pickup element of high pixel well.

Description

Camera optical camera lens
Technical field
It is more particularly to a kind of to be applied to the hand-held terminals such as smart mobile phone, digital camera the present invention relates to field of optical lens Equipment, and the camera optical camera lens of the camera device such as monitor, PC camera lenses.
Background technology
In recent years, with the rise of smart mobile phone, the demand for minimizing phtographic lens increasingly improves, and general phtographic lens Sensor devices nothing more than being that photosensitive coupled apparatus (Charge Coupled Device, CCD) or Complimentary Metal-Oxide are partly led Two kinds of body device (Complementary Metal-OxideSemicondctor Sensor, CMOS Sensor), and due to half Conductor manufacturing process technology progresses greatly so that the Pixel Dimensions of sensor devices reduce, along with electronic product is good with function now And compact external form is development trend, therefore, the miniaturization pick-up lens for possessing good image quality becomes at present The main flow of in the market.
To obtain preferable image quality, the camera lens that tradition is equipped on mobile phone camera uses three-chip type or quadruple lenses more Structure.However, with the development of technology and increasing for users on diversity, constantly contracted in the elemental area of sensor devices It is small, and in the case of requirement continuous improvement of the system to image quality, five chip lens arrangements occur gradually over lens design and worked as In, although five common chip lens can correct optical system major part optical aberration, but can not be with outstanding Low optical overall length (TTL, Total Track Length) and larger image height are taken into account while optical characteristics, can not be good Suitable for the Portable image pickup element of high pixel.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide a kind of camera optical camera lens, it can be with outstanding light Low TTL and larger image height are taken into account while learning characteristic, and the Portable image pickup element of high pixel can be applied to well.
In order to solve the above technical problems, embodiments of the present invention provide a kind of camera optical camera lens, by thing side to picture Side sequentially includes：One aperture, one has the first lens of positive refracting power, and one has the second lens of negative refracting power, and one with negative 3rd lens of refracting power, one has the 4th lens of positive refracting power, and one has the 5th lens for bearing refracting power；Entirety is taken the photograph As the focal length of optical lens is f, the focal length of first lens is f1, and the focal length of second lens is f2, and the described 3rd is saturating The focal length of mirror is f3, and the focal length of the 4th lens is f4, and the focal length of the 5th lens is f5, the Abbe of second lens Number is v2, and the refractive index of second lens is n2, and the refractive index of the 5th lens is n5, thick on the axle of first lens Spend for d1, thickness is d3 on the axle of second lens, and thickness is d7 on the axle of the 4th lens, the camera optical camera lens Optics overall length be TTL, the radius of curvature of the second lens thing side is r3, the radius of curvature of the 3rd lens image side surface For r6, meet following relationship：0.75<f1/f<0.80,-2.0<f2/f<-1.9,-7<f3/f<-6,0.5<f4/f<0.6,- 0.5<f5/f<-0.4。
Embodiment of the present invention in terms of existing technologies, not only can be effective by the configuration mode of said lens There is the cooperation of the individual lenses of particular kind of relationship outstanding to obtain to correct aberration using the lens with different refracting powers and focal length Optical characteristics, moreover it is possible to take into account low optical overall length TTL and larger image height, and can be well suitable for the portable of high pixel Photographing element.
In addition, the Abbe number v2 of second lens, the refractive index n2 of second lens, the refraction of the 5th lens Rate n5 meets following relationship：11<v2/n2<14,1.15<n2/n5<1.25.
In addition, thickness d 1 on the axle of first lens, thickness d 3 on the axle of second lens, the 4th lens Thickness d 7 on axle, the optics overall length TTL of the camera optical camera lens meet following relationship, 0.035<d3/TTL<0.04,0.21 <d3/d1<0.23,0.21<d3/d7<0.23；
In addition, the radius of curvature r3 of the second lens thing side, the radius of curvature r6 of the 3rd lens image side surface expire Sufficient following relationship, 2.3<(r3-r6)/(r3+r6)<2.5.
In addition, the focal length f1 of first lens, focal length f2, the focal length f3 of the 3rd lens of second lens, The focal length f4 of 4th lens, and the focal length f5 of the 5th lens meet following relationship：2.9<f1<3.0, -7.8< f2<- 7.3, -27<f3<- 25,2.0<f4<2.1, -1.7<f5<-1.6.
In addition, the refractive index n1 of first lens, the refractive index n2 of second lens, the refraction of the 3rd lens Rate n3, the refractive index n4 of the 4th lens, and the refractive index n5 of the 5th lens meet following relationship：1.5<n1< 1.6,1.8<n2<1.9,1.65<n3<1.68,1.53<n4<1.55 1.52<n5<1.55.
In addition, the Abbe number v1 of first lens, the Abbe number v2 of second lens, the Abbe of the 3rd lens Number v3, the Abbe number v4 of the 4th lens, and the Abbe number v5 of the 5th lens meet following relationship：55<v1< 57,22<v2<25,20<v3<22,55<v4<57,55<v5<58.
In addition, the optics overall length TTL of the camera optical camera lens is less than or equal to 4.4 millimeters.
In addition, the aperture F numbers of the camera optical camera lens are less than or equal to 2.0.
In addition, thickness d 5 on the axle of the 3rd lens, thickness d 7 on the axle of the 4th lens, meet following relationship Formula：1.9 ＜ (d7+d5)/(d7-d5) ＜ 2.0.
Brief description of the drawings
Fig. 1 is the structural representation of the camera optical camera lens of the present invention in the first embodiment；
Fig. 2 is that the axle colouring differential of camera optical camera lens shown in Fig. 1 is intended to；
Fig. 3 is the ratio chromatism, schematic diagram of camera optical camera lens shown in Fig. 1；
Fig. 4 is the astigmatism curvature of field and distortion schematic diagram of camera optical camera lens shown in Fig. 1.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, each reality below in conjunction with accompanying drawing to the present invention The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each embodiment of the present invention, In order that reader more fully understands the present invention and proposes many ins and outs.But even if without these ins and outs and base Many variations and modification in following embodiment, can also realize claimed technical solution of the invention.
Refer to the attached drawing, the invention provides a kind of camera optical camera lens.Fig. 1 show taking the photograph for first embodiment of the invention As optical lens 10, the camera optical camera lens 10 includes five lens.Specifically, the camera optical camera lens 10, by thing side extremely Image side sequentially includes：Aperture St, the first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4 and the 5th lens L5.The optical elements such as optical filtering piece (filter) GF are may be provided between 5th lens L5 and image planes Si.
First lens L1 has positive refracting power, can effectively reduce system length, and it is convex surface that its thing side is outwardly, light Circle St is arranged between object and the first lens L1.Second lens L2, which has, bears refracting power, in present embodiment, the second lens L2 image side surface is concave surface.3rd lens L3, which has, bears refracting power, and in present embodiment, the 3rd lens L3 thing side is recessed Face, image side surface are convex surface.4th lens L4 has a positive refracting power, in present embodiment, the 4th lens L4 thing side is concave surface, Image side surface is convex surface, and it can distribute the first lens L1 positive refracting power, and then reduce system sensitivity.5th lens L5 has negative Refracting power, in present embodiment, the 5th lens L5 thing side is concave surface.
Here, the focal length for defining overall camera optical camera lens 10 is f, the focal length of the first lens L1 is f1, described Two lens L2 focal length is f2, and the focal length of the 3rd lens L3 is f3, and the focal length of the 4th lens L4 is f4, the described 5th Lens L5 focal length is f5, and the Abbe number of the second lens L2 is v2, and the refractive index of the second lens L2 is n2, described Five lens L5 refractive index is n5, and thickness is d1 on the axle of the first lens L1, and thickness is on the axle of the second lens L2 D3, thickness is d7 on the axle of the 4th lens L4, and the optics overall length of the camera optical camera lens is TTL, second lens The radius of curvature of L2 things side is r3, and the radius of curvature of the 3rd lens L3 image side surfaces is r6.The f, f1, f2, f3, f4, F5, v2, v3, n2, n3, n5, d1, d3, d5, d7, r3 and r6 meet following relationship 0.75<f1/f<0.80,-2.0<f2/f <-1.9,-7<f3/f<-6,0.5<f4/f<0.6,-0.5<f5/f<-0.4；11<v2/n2<14,1.15<n2/n5<1.25, 0.035<d3/TTL<0.04,0.21<d3/d1<0.23,0.21<d3/d7<0.23；2.3<(r3-r6)/(r3+r6)<2.5.
The focal length of focal length, each lens when camera optical camera lens 10 of the present invention, the Abbe number of associated lens, refraction When thickness, radius of curvature meet above-mentioned relation formula in rate, axle, it can control/adjust the refracting power size of each lens to configure, repairing While positive aberration ensures outstanding optical characteristics, meet the design requirement of low TTL and larger image height, be more suitable for high pixel Portable image pickup element and device.
Specifically, in embodiment of the present invention, the focal length f1 of the first lens L1, the focal length of the second lens L2 F2, the focal length f3 of the 3rd lens L3, the focal length f4 of the 4th lens L4, and the focal length f5 of the 5th lens L5 can To be designed to meet following relationship：2.9<f1<3.0, -7.8<f2<- 7.3, -27<f3<- 25,2.0<f4<2.1, -1.7< f5<- 1.6, unit：Millimeter (mm).It is so designed that, enables to the optics overall length TTL of overall camera optical camera lens 10 to become as far as possible It is short, maintain the characteristic of miniaturization.
Preferably, the optical full length TTL of the camera optical camera lens 10 of embodiment of the present invention is less than or equal to 4.4 millis Rice.It is so designed that, is more conducive to realize the subminaturization design of camera optical camera lens 10.Preferably, in embodiment of the present invention, take the photograph As optical lens 10 aperture F numbers be less than or equal to 2.0, be advantageously implemented the camera optical camera lens 10 large aperture design, And the imaging performance under low-light (level) environment can be improved.
Preferably, in embodiment of the present invention, thickness d 5 on the axle of the 3rd lens is thick on the axle of the 4th lens D7 is spent, meets following relationship：1.9 ＜ (d7+d5)/(d7-d5) ＜ 2.0.It is so designed that so that the 3rd lens L3 and the 4th is saturating Mirror L4 has optimal thickness, is advantageously implemented the assembling configuration of system.
In the camera optical camera lens 10 of the present invention, the material of each lens can be glass or plastics, if the material of lens is glass Glass, then it can increase the free degree of optical system refracting power configuration of the present invention, if lens material is plastics, can effectively reduce Production cost.
In embodiment of the present invention, the material of the second lens L2 is glass, the first lens L1, the 3rd lens L3, the 4th lens L4 and the 5th lens L5 material are plastics.Wherein, the second lens L2 is that the design of glass material can be with The effectively optical property of lifting camera optical camera lens 10.
Further, in a preferred embodiment of the invention, the refractive index n1 of the first lens L1, described second is saturating Mirror L2 refractive index n2, the refractive index n3 of the 3rd lens L3, the refractive index n4 of the 4th lens L4, and the described 5th Lens L5 refractive index n5 meets following relationship：1.5<n1<1.6,1.8<n2<1.9,1.65<n3<1.68,1.53<n4< 1.55 1.52<n5<1.55.It is so designed that, is advantageous to lens and appropriate matching is obtained on optical material, and then this can be made Camera optical camera lens 10 obtains preferable image quality.
It should be noted that in embodiment of the present invention, the Abbe number v1, the second lens L2 of the first lens L1 Abbe number v2, the Abbe number v3 of the 3rd lens L3, the Abbe number v4 of the 4th lens L4, and the 5th lens L5 Abbe number v5 is designed to meet following relationship：55<v1<57,22<v2<25,20<v3<22,55<v4<57,55< v5<58.It is so designed that, can effectively suppresses Optical Chromatic phenomenon when camera optical camera lens 10 is imaged.
It is understood that the refractive index design and Abbe number design of above-mentioned each lens can be combined with each other and Apply in the design of camera optical camera lens 10, so that the second lens L2 and the 3rd lens L3 is using high refraction The optical material of rate, low Abbe number, it can effectively reduce system aberration, greatly improve the imaging product of camera optical camera lens 10 Matter.
In addition, the surface of lens could be arranged to aspherical, the aspherical shape that can be easily fabricated to beyond sphere, obtain More controlled variable is obtained, to cut down aberration, and then reduces the number that lens use, therefore can effectively reduce the present invention and take the photograph As the total length of optical lens.In embodiment of the present invention, the thing side of each lens and image side surface are aspherical.
Preferably, the point of inflexion and/or stationary point are also provided with the thing side of the lens and/or image side surface, with full The imaging demand of sufficient high-quality, specifically can embodiment, join lower described.
It shown below the design data of the camera optical camera lens 10 according to embodiment of the present invention 1.
Table 1, table 2 show the data of the camera optical camera lens 10 of embodiment of the present invention 1.
【Table 1】
The implication of each symbol is as follows.
f：The focal length of camera optical camera lens 10；
f1：First lens L1 focal length；
f2：Second lens L2 focal length；
f3：3rd lens L3 focal length；
f4：4th lens L4 focal length；
f5：5th lens L5 focal length.
【Table 2】
Wherein, R1, R2 are the first lens L1 thing side, image side surface, and R3, R4 are the second lens L2 thing side, image side Face, R5, R6 are the 3rd lens L3 thing side, image side surface, and R7, R8 are the 4th lens L4 thing side, image side surface, and R9, R10 are 5th lens L5 thing side, image side surface, R11, R12 are optical filtering piece GF thing side, image side surface.Other each symbols contain Justice is as follows.
d0：Aperture St is to distance on the axle of the first lens L1 thing side；
d1：Thickness on first lens L1 axle；
d2：First lens L1 image side surface is to distance on the axle of the second lens L2 thing side；
d3：Thickness on second lens L2 axle；
d4：Second lens L2 image side surface is to distance on the axle of the 3rd lens L3 thing side；
d5：Thickness on 3rd lens L3 axle；
d6：3rd lens L3 image side surface is to distance on the axle of the 4th lens L4 thing side；
d7：Thickness on 4th lens L4 axle；
d8：4th lens L4 image side surface is to distance on the axle of the 5th lens L5 thing side；
d9：Thickness on 5th lens L5 axle；
d10：5th lens L5 image side surface is to distance on the axle of optical filtering piece GF thing side；
d11：Thickness on optical filtering piece GF axle；
d12：Optical filtering piece GF image side surface is to distance on the axle of image planes；
nd1：First lens L1 refractive index；
nd2：Second lens L2 refractive index；
nd3：3rd lens L3 refractive index；
nd4：4th lens L4 refractive index；
nd5：5th lens L5 refractive index；
ndg：Optical filtering piece GF refractive index；
v1：First lens L1 Abbe number；
v2：Second lens L2 Abbe number；
v3：3rd lens L3 Abbe number；
v4：4th lens L4 Abbe number；
v5：5th lens L5 Abbe number；
vg：Optical filtering piece GF Abbe number.
Table 3 shows the aspherical surface data of each lens in the camera optical camera lens 10 of embodiment of the present invention 1.
【Table 3】
Table 4, table 5 show that the point of inflexion of each lens and stationary point are set in the camera optical camera lens 10 of embodiment of the present invention 1 Count.Wherein, R1, R2 represent the first lens L1 thing side and image side surface respectively, and R3, R4 represent the second lens L2's respectively Thing side and image side surface, R5, R6 represent the 3rd lens L3 thing side and image side surface respectively, and R7, R8 represent the 4th lens respectively L4 thing side and image side surface, R9, R10 represent the 5th lens L5 thing side and image side surface respectively." point of inflexion position " field Corresponding data is vertical range of the point of inflexion set by each lens surface to the optical axis of camera optical camera lens 10." stationary point position " column Position corresponding data is vertical range of the stationary point set by each lens surface to the optical axis of camera optical camera lens 10.
【Table 4】
Point of inflexion number Point of inflexion position 1 Point of inflexion position 2
R1 1 0.965
R2 1 0.545
R3 0
R4 0
R5 0
R6 1 0.965
R7 0
R8 2 1.045 1.395
R9 1 1.235
R10 1 0.565
【Table 5】
Stationary point number Stationary point position 1
R1 0
R2 1 0.815
R3 0
R4 0
R5 0
R6 0
R7 0
R8 0
R9 1 2.265
R10 1 1.345
Fig. 2, Fig. 3 respectively illustrate camera optical of light of the wavelength for 486nm, 588nm and 656nm Jing Guo embodiment 1 Aberration and ratio chromatism, schematic diagram on axle after camera lens 10.Fig. 4 then shows that wavelength is that 588nm light passes through embodiment 1 Camera optical camera lens 10 after the astigmatism curvature of field and distortion schematic diagram.
Table 6 below lists the numerical value that each conditional is corresponded in present embodiment according to above-mentioned condition formula.Obviously, this implementation The imaging optical system of mode meets above-mentioned conditional.
【Table 6】
Condition Embodiment 1
0.75<f1/f<0.80 0.765790889
-2.0<f2/f<-1.9 -1.968485472
-7<f3/f<-6 -6.880810549
0.5<f4/f<0.6 0.551841758
-0.5<f5/f<-0.4 -0.438573592
11<v2/n2<14 12.88576069
1.15<n2/n5<1.25 1.203086467
0.035<d3/TTL<0.04 0.038195273
0.21<d3/d1<0.23 0.218878249
0.21<d3/d7<0.23 0.220994475
2.3<(r3-r6)/(r3+r6)<2.5 2.393656792
In the present embodiment, the Entry pupil diameters of the camera optical camera lens are 1.92mm, full filed image height 3.261mm, The angle of visual field of diagonal is 80.10 °.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment party of the present invention Formula, and in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and model of the present invention Enclose.

Claims (10)

1. a kind of camera optical camera lens, it is characterised in that the camera optical camera lens, sequentially included by thing side to image side：One light Circle, one has the first lens of positive refracting power, and one has the second lens of negative refracting power, and one the with negative refracting power the 3rd is saturating Mirror, one has the 4th lens of positive refracting power, and one has the 5th lens for bearing refracting power；
The focal length of overall camera optical camera lens is f, and the focal length of first lens is f1, and the focal length of second lens is f2, The focal length of 3rd lens is f3, and the focal length of the 4th lens is f4, and the focal length of the 5th lens is f5, is met following Relational expression：
0.75<f1/f<0.80,-2.0<f2/f<-1.9,-7<f3/f<-6,0.5<f4/f<0.6,-0.5<f5/f<-0.4。
2. camera optical camera lens according to claim 1, it is characterised in that the Abbe number v2 of second lens, it is described The refractive index n2, the refractive index n5 of the 5th lens of second lens meet following relationship：
11<v2/n2<14,1.15<n2/n5<1.25。
3. camera optical camera lens according to claim 1, it is characterised in that thickness d 1 on the axle of first lens, institute State thickness d 3 on the axle of the second lens, thickness d 7 on the axle of the 4th lens, the optics overall length TTL of the camera optical camera lens Meet following relationship：
0.035<d3/TTL<0.04,0.21<d3/d1<0.23,0.21<d3/d7<0.23。
4. camera optical camera lens according to claim 1, it is characterised in that the radius of curvature of the second lens thing side R3, the radius of curvature r6 of the 3rd lens image side surface meet following condition formulae：
2.3<(r3-r6)/(r3+r6)<2.5。
5. camera optical camera lens according to claim 1, it is characterised in that the focal length f1 of first lens, described Focal length f2, the focal length f3 of the 3rd lens, the focal length f4 of the 4th lens of two lens, and Jiao of the 5th lens Meet following relationship away from f5：
2.9<f1<3.0, -7.8<f2<- 7.3, -27<f3<- 25,2.0<f4<2.1, -1.7<f5<-1.6.
6. camera optical camera lens according to claim 1, it is characterised in that the refractive index n1 of first lens, it is described Refractive index n2, the refractive index n3 of the 3rd lens, the refractive index n4 of the 4th lens of second lens, and the described 5th The refractive index n5 of lens meets following relationship：
1.5<n1<1.6,1.8<n2<1.9,1.65<n3<1.68,1.53<n4<1.55 1.52<n5<1.55.
7. camera optical camera lens according to claim 1, it is characterised in that the Abbe number v1 of first lens, it is described Abbe number v2, the Abbe number v3 of the 3rd lens, the Abbe number v4 of the 4th lens of second lens, and the described 5th The Abbe number v5 of lens meets following relationship：
55<v1<57,22<v2<25,20<v3<22,55<v4<57,55<v5<58.
8. camera optical camera lens according to claim 1, it is characterised in that the optics overall length of the camera optical camera lens TTL is less than or equal to 4.4 millimeters.
9. camera optical camera lens according to claim 1, it is characterised in that the aperture F numbers of the camera optical camera lens are small In or equal to 2.0.
10. camera optical camera lens according to claim 1, it is characterised in that thickness d 5 on the axle of the 3rd lens, institute Thickness d 7 on the axle of the 4th lens is stated, meets following relationship：1.9 ＜ (d7+d5)/(d7-d5) ＜ 2.0.
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US16/102,034 US10606026B2 (en) 2017-11-17 2018-08-13 Camera optical lens

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