CN108051899A - Pick-up lens - Google Patents
Pick-up lens Download PDFInfo
- Publication number
- CN108051899A CN108051899A CN201711449440.5A CN201711449440A CN108051899A CN 108051899 A CN108051899 A CN 108051899A CN 201711449440 A CN201711449440 A CN 201711449440A CN 108051899 A CN108051899 A CN 108051899A
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- Prior art keywords
- lens
- pick
- glass
- object side
- meets conditional
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- 239000011521 glass Substances 0.000 claims abstract description 29
- 238000003384 imaging method Methods 0.000 claims abstract description 23
- 239000000571 coke Substances 0.000 claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 8
- 210000001747 pupil Anatomy 0.000 claims description 4
- 239000005321 cobalt glass Substances 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 230000013011 mating Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 16
- 230000004075 alteration Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
Classifications
-
- 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
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
-
- 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
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The present invention provides a kind of pick-up lens, includes successively from object side to imaging surface：The first lens with negative power, first lens are the glass spheric glass of concave-concave；The second lens with positive light coke, second lens are the glass spheric glass that image side surface is convex surface；The 3rd lens with positive light coke, the 3rd lens are curved month type and concave surface towards the glass spheric glass of imaging surface；Diaphragm；The 4th lens with negative power, the 4th lens are the glass spheric glass of concave-concave；The 5th lens with positive light coke, the 5th lens are the glass spheric glass of biconvex, and the 4th lens and the 5th lens group are into balsaming lens；The 6th lens with positive light coke, the 6th lens are the glass spheric glass that object side is convex surface.Pick-up lens in the present invention realizes the uniformity of the imaging performance under 40 DEG C~95 DEG C of high and low temperature environment.
Description
Technical field
The present invention relates to optical lens technical field, more particularly to a kind of pick-up lens.
Background technology
In field of automobile safety, in-vehicle camera system is of increased attention, and consumer is subjective to pacify driving
The great attention of full property is but also the market demand of on-vehicle lens is growing.
Requirement of the vehicle-mounted pick-up camera lens to environment it is very high, it is necessary under high and low temperature environment still keep stablize, clearly into
Picture, however, among the prior art, with the variation of temperature, the performance of camera lens significant change can also occur for general pick-up lens,
Requirement can not be met.Meanwhile with the development and update of vehicle-mounted COMS chips, the performance of general pick-up lens is all in the market
It can not be matched with the vehicle-mounted CMOS chip of high pixel.
The content of the invention
Based on this, the object of the present invention is to provide a kind of pick-up lens, so as to still be kept under high and low temperature environment steady
Determine, be clearly imaged.
A kind of pick-up lens, includes successively from object side to imaging surface：
With negative power and it is two-sided be concave surface the first lens；
With the second lens that positive light coke and image side surface are convex surface；
It is the 3rd lens that convex surface image side surface is concave surface with positive light coke and object side；
Diaphragm；
With negative power and it is two-sided be concave surface the 4th lens；
With positive light coke and it is two-sided be convex surface the 5th lens, and the 4th lens and the 5th lens form
Balsaming lens；
With the 6th lens that positive light coke and object side are convex surface；
Wherein, first lens, second lens, the 3rd lens, the 4th lens, it is described 5th thoroughly
Mirror, the 6th lens are glass spheric glass.
Above-mentioned pick-up lens, using the eyeglass of six environmentally friendly glass materials, simple in structure, eyeglass machinability is strong, and leads to
Cross the reasonable distribution of different lens shapes and focal power, realize pick-up lens under -40 DEG C~95 DEG C of high and low temperature environment into
As the uniformity of performance, it is ensured that can still keep stablizing under high and low temperature environment, clearly be imaged, in addition, also improving mirror
The head size of imaging target surface and the resolution ratio of camera lens can match the vehicle-mounted CMOS chip of 2,000,000 pixel scales, be used with meeting
It is required that.
Further, the pick-up lens meets conditional：
(dn/dt) 3 ＜ 3.5 × 10-6/ DEG C,
(dn/dt) 4 ＞ -1 × 10-6/ DEG C,
(dn/dt) 5 ＜ -3 × 10-6/ DEG C,
Wherein, (dn/dt) 3, (dn/dt) 4, (dn/dt) 5 represent the 3rd lens, the 4th lens, described respectively
The Refractive Index of Material of 5th lens varies with temperature rate.
Further, to effectively reduce the external bore of camera lens, the pick-up lens meets conditional：
0 ＜ D1/ f/y ＜ 0.5,
Wherein, D1Represent the maximum clear aperture of the object side of first lens, y represents the object side of first lens
The corresponding image height of maximum clear aperture in face, f represent the focal length of the entire pick-up lens.
Further, it is the aberration of effectively control camera lens, the pick-up lens meets conditional：
1 ＜ f456/ f ＜ 2,
Wherein, f456Represent the combined focal length of the 4th lens, the 5th lens and the 6th lens, f represents whole
The focal length of a pick-up lens.
Further, the pick-up lens meets conditional：
0.8 ＜ | R52|/f ＜ 3,
Wherein, | R52| represent the absolute value of the image side curvature radius of the 5th lens, f represents the entire camera lens
The focal length of head.
Further, the pick-up lens meets conditional：
N1＜ 1.65, N2＞ 1.7, N3＞ 1.7,
Wherein, N1、N2、N3First lens, second lens, the refractive index of the 3rd lens are represented respectively.
Further, the pick-up lens meets conditional：
V1＞ 55, V4＜ 30, V5＞ 60,
Wherein, V1、V4、V5First lens, the 4th lens, the Abbe number of the 5th lens are represented respectively.
Further, the pick-up lens meets conditional：
F/D ＜ 1.8,
Wherein, f represents the focal length of the entire pick-up lens, and D represents the entrance pupil bore of the entire pick-up lens.
Further, the pick-up lens further includes optical filter, and the optical filter is located at the 6th lens close to imaging
The one side in face.
Further, the optical filter is any one among infrared cut of light optical filter or smalt optical filter.
Description of the drawings
Fig. 1 a are the structure diagram for the pick-up lens that the embodiment of the present invention one provides；
Fig. 1 b are MTF curve schematic diagram of the pick-up lens that provides of the embodiment of the present invention one at 20 DEG C；
Fig. 1 c are MTF curve schematic diagram of the pick-up lens that provides of the embodiment of the present invention one at -40 DEG C；
Fig. 1 d are MTF curve schematic diagram of the pick-up lens that provides of the embodiment of the present invention one at 95 DEG C；
Fig. 2 a are the structure diagram of pick-up lens provided by Embodiment 2 of the present invention；
Fig. 2 b are MTF curve schematic diagram of the pick-up lens provided by Embodiment 2 of the present invention at 20 DEG C；
Fig. 2 c are MTF curve schematic diagram of the pick-up lens provided by Embodiment 2 of the present invention at -40 DEG C；
Fig. 2 d are MTF curve schematic diagram of the pick-up lens provided by Embodiment 2 of the present invention at 95 DEG C；
Fig. 3 a are the structure diagram for the pick-up lens that the embodiment of the present invention three provides；
Fig. 3 b are MTF curve schematic diagram of the pick-up lens that provides of the embodiment of the present invention three at 20 DEG C；
Fig. 3 c are MTF curve schematic diagram of the pick-up lens that provides of the embodiment of the present invention three at -40 DEG C；
Fig. 3 d are MTF curve schematic diagram of the pick-up lens that provides of the embodiment of the present invention three at 95 DEG C；
Fig. 4 a are the structure diagram for the pick-up lens that the embodiment of the present invention four provides；
Fig. 4 b are MTF curve schematic diagram of the pick-up lens that provides of the embodiment of the present invention four at 20 DEG C；
Fig. 4 c are MTF curve schematic diagram of the pick-up lens that provides of the embodiment of the present invention four at -40 DEG C；
Fig. 4 d are MTF curve schematic diagram of the pick-up lens that provides of the embodiment of the present invention four at 95 DEG C.
Main element symbol description：
| First lens | 11 | Second lens | 12 |
| 3rd lens | 13 | Diaphragm | 14 |
| 4th lens | 15 | 5th lens | 16 |
| 6th lens | 17 | Optical filter | 18 |
Following specific embodiment will be further illustrated the present invention with reference to above-mentioned attached drawing.
Specific embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In attached drawing
Give several embodiments of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose for providing these embodiments is made to the disclosure more thorough and comprehensive.
It should be noted that when element is referred to as " being fixedly arranged on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The normally understood meaning of technical staff is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more phases
The arbitrary and all combination of the Listed Items of pass.
Embodiment one
A is please referred to Fig.1, the pick-up lens showing in first embodiment of the invention includes successively from object side to imaging surface
The first lens 11 with negative power, the second lens 12 with positive light coke, the 3rd lens 13, the light with positive light coke
Door screen 14, the 4th lens 15, the 5th lens 16 with positive light coke, the 6th lens with positive light coke with negative power
17 and optical filter 18.
Wherein, first lens 11 are the glass spherical mirror of concave-concave (surface towards object side and image side is concave surface)
Piece；Second lens 12 are glass spheric glass that image side surface is convex surface (towards the surface of image side)；3rd lens 13
For curved month type and concave surface is towards the glass spheric glass of imaging surface, and the 4th lens 15 are the glass spheric glass of concave-concave；Institute
State the glass spheric glass that the 5th lens 16 are biconvex (surface towards object side and image side is convex surface), and the 4th lens
15 form balsaming lens with the 5th lens 16；6th lens 17 are that object side (towards the surface of object side) is convex surface
Glass spheric glass；The optical filter is infrared cut of light optical filter, and among other embodiments, the optical filter can also be
Smalt optical filter.
Wherein, the pick-up lens meets conditional：
(dn/dt) 3 ＜ 3.5 × 10-6/ DEG C, (1)
(dn/dt) 4 ＞ -1 × 10-6/ DEG C, (2)
(dn/dt) 5 ＜ -3 × 10-6/ DEG C, (3)
Wherein, (dn/dt) 3, (dn/dt) 4, (dn/dt) 5 represent respectively the 3rd lens 13, the 4th lens 15,
The Refractive Index of Material of 5th lens 16 varies with temperature rate.Dn/dt represents that the refractive index of lens materials varies with temperature rate,
| dn/dt | value it is bigger, it is bigger to illustrate that temperature change influences the refractive index of material, when meeting conditional (1), (2) and (3)
When, camera lens is may further ensure that under -40 DEG C~95 DEG C of high/low temperature working environment, and the uniformity of imaging performance works as temperature
During variation, the variations in refractive index between material can mutually compensate for, and effectively reduce influence of the variation of refractive index to camera lens.
To effectively reduce the external bore of camera lens, the pick-up lens meets conditional：
0 ＜ D1/ f/y ＜ 0.5, (4)
Wherein, D1Represent the maximum clear aperture of the object side of first lens 11, y represents first lens 11
The corresponding image height of maximum clear aperture of object side, f represent the focal length of the entire pick-up lens.When meeting conditional (4),
The entrance pupil for being conducive to camera lens is located proximate to first lens 11, ensure that camera lens at work, occupies smaller space.
Effectively to control the aberration of camera lens, the pick-up lens meets conditional：
1 ＜ f456/ f ＜ 2,
Wherein, f456Represent the combined focal length of the 4th lens 15, the 5th lens 16 and the 6th lens 17, f
Represent the focal length of the entire pick-up lens.
Further, the pick-up lens meets conditional：
0.8 ＜ | R52|/f ＜ 3, (5)
Wherein, | R52| represent the absolute value of the image side curvature radius of the 5th lens 16, f represents the entire camera shooting
The focal length of camera lens.When meeting conditional (5), be conducive to Lens miniaturization.
Further, the pick-up lens meets conditional：
N1＜ 1.65, N2＞ 1.7, N3＞ 1.7,
Wherein, N1、N2、N3First lens 11, second lens 12, the folding of the 3rd lens 13 are represented respectively
Penetrate rate.
Further, the pick-up lens meets conditional：
V1＞ 55, V4＜ 30, V5＞ 60,
Wherein, V1、V4、V5Represent respectively first lens 11, the 4th lens 15, the 5th lens 16 Ah
Shellfish number.
Further, the pick-up lens meets conditional：
F/D ＜ 1.8, (6)
Wherein, f represents the focal length of entire pick-up lens, and D represents the entrance pupil bore of entire pick-up lens.When meeting conditional
(6) when, thang-kng amount of the pick-up lens of the present invention under low light environment can be ensured, so as to fulfill the good bat under low light environment
Take the photograph effect.
It is pointed out that (i=1,2,3 ... 13) represent the lens surface of the symbol lines meaning to Si in Fig. 1 a
Table 1 is referred to, show the design parameter of each lens among the present embodiment.
Table 1：
The MTF curve figure of 1b to 1d can be drawn with reference to the accompanying drawings, and the pick-up lens of the present embodiment is in 20 DEG C of room temperature, extremely low temperature
At 95 DEG C of -40 DEG C of degree and high temperature, the equal good blur-free imaging of energy illustrates high/low temperature of the pick-up lens of the present invention at -40 DEG C~95 DEG C
Imaging performance is consistent under environment, and stablizes clearly.
To sum up, the pick-up lens among the above embodiment of the present invention, using the eyeglass of six environmentally friendly glass materials, structure letter
Single, eyeglass machinability is strong, and by different lens shapes and the reasonable distribution of focal power, realizes pick-up lens at -40 DEG C
The uniformity of imaging performance under~95 DEG C of high and low temperature environment, it is ensured that can still keep stable, clear under high and low temperature environment
Imaging, in addition, also improving the size of lens imaging target surface and the resolution ratio of camera lens, can match the vehicle of 2,000,000 pixel scales
CMOS chip is carried, to meet requirement.Moreover, by setting the optical filter behind all lens, to filter out
Infrared light, it is therefore prevented that infrared light generates interference to imaging.
Embodiment two
The structure of the pick-up lens among pick-up lens and first embodiment among the present embodiment is more or less the same, difference
It is in the parameter of part lens has differences, and refers to table 2, show the design parameter of each lens among the present embodiment.
Table 2：
The MTF curve figure of 2b to 2d can be drawn with reference to the accompanying drawings, and the pick-up lens of the present embodiment is in 20 DEG C of room temperature, extremely low temperature
At 95 DEG C of -40 DEG C of degree and high temperature, the equal good blur-free imaging of energy illustrates high/low temperature of the pick-up lens of the present invention at -40 DEG C~95 DEG C
Imaging performance is consistent under environment, and stablizes clearly.
Embodiment three
The structure of the pick-up lens among pick-up lens and first embodiment among the present embodiment is more or less the same, difference
It is in the parameter of part lens has differences, and refers to table 3, show the design parameter of each lens among the present embodiment.
Table 3：
The MTF curve figure of 3b to 3d can be drawn with reference to the accompanying drawings, and the pick-up lens of the present embodiment is in 20 DEG C of room temperature, extremely low temperature
At 95 DEG C of -40 DEG C of degree and high temperature, the equal good blur-free imaging of energy illustrates high/low temperature of the pick-up lens of the present invention at -40 DEG C~95 DEG C
Imaging performance is consistent under environment, and stablizes clearly.
Example IV
The structure of the pick-up lens among pick-up lens and first embodiment among the present embodiment is more or less the same, difference
It is in the parameter of part lens has differences, and refers to table 4, show the design parameter of each lens among the present embodiment.
Table 4
| Surface sequence number | Surface type | Radius of curvature | Thickness | Refractive index | Abbe number | |
| Object plane | Object plane | Spherical surface | It is infinite | It is infinite | ||
| S1 | First lens | Spherical surface | -10.93 | 0.60 | 1.52 | 64.2 |
| S2 | Spherical surface | 6.55 | 1.85 | |||
| S3 | Second lens | Spherical surface | 53.73 | 4.45 | 1.95 | 32.3 |
| S4 | Spherical surface | -11.08 | 0.07 | |||
| S5 | 3rd lens | Spherical surface | 5.34 | 1.89 | 1.90 | 31.3 |
| S6 | Spherical surface | 6.11 | 0.54 | |||
| Diaphragm | Diaphragm | Spherical surface | It is infinite | 0.15 | ||
| S7 | 4th lens | Spherical surface | -21.80 | 0.59 | 1.85 | 23.8 |
| S8 | 5th lens | Spherical surface | 4.60 | 4.26 | 1.50 | 81.6 |
| S9 | Spherical surface | -6.04 | 0.07 | |||
| S10 | 6th lens | Spherical surface | 7.40 | 5.50 | 1.76 | 52.3 |
| S11 | Spherical surface | 18.37 | 1.00 | |||
| S12 | Optical filter | Spherical surface | It is infinite | 0.80 | 1.52 | 64.2 |
| S13 | Spherical surface | It is infinite | 2.23 | |||
| Image planes | Spherical surface |
The MTF curve figure of 4b to 4d can be drawn with reference to the accompanying drawings, and the pick-up lens of the present embodiment is in 20 DEG C of room temperature, extremely low temperature
At 95 DEG C of -40 DEG C of degree and high temperature, the equal good blur-free imaging of energy illustrates high/low temperature of the pick-up lens of the present invention at -40 DEG C~95 DEG C
Imaging performance is consistent under environment, and stablizes clearly.
Refer to table 5, the system focal length for being the corresponding optical characteristics of the various embodiments described above, including the pick-up lens
F, system overall length TTL, 2 θ of field angle, while further include the corresponding correlation values of above-mentioned each relational expression.
Table 5：
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of pick-up lens, which is characterized in that include successively from object side to imaging surface：
With negative power and it is two-sided be concave surface the first lens；
With the second lens that positive light coke and image side surface are convex surface；
It is the 3rd lens that convex surface image side surface is concave surface with positive light coke and object side；
Diaphragm；
With negative power and it is two-sided be concave surface the 4th lens；
With positive light coke and it is two-sided be convex surface the 5th lens, and the 4th lens and the 5th lens group are into gluing
Lens；
With the 6th lens that positive light coke and object side are convex surface；
Wherein, first lens, second lens, the 3rd lens, the 4th lens, the 5th lens, institute
It is glass spheric glass to state the 6th lens.
2. pick-up lens according to claim 1, which is characterized in that the pick-up lens meets conditional：
(dn/dt) 3 ＜ 3.5 × 10-6/ DEG C,
(dn/dt) 4 ＞ -1 × 10-6/ DEG C,
(dn/dt) 5 ＜ -3 × 10-6/ DEG C,
Wherein, (dn/dt) 3, (dn/dt) 4, (dn/dt) 5 represent the 3rd lens, the 4th lens, the described 5th respectively
The Refractive Index of Material of lens varies with temperature rate.
3. pick-up lens according to claim 1, which is characterized in that the pick-up lens meets conditional：
0 ＜ D1/ f/y ＜ 0.5,
Wherein, D1Represent the maximum clear aperture of the object side of first lens, y represents the object side of first lens
The corresponding image height of maximum clear aperture, f represent the focal length of the entire pick-up lens.
4. pick-up lens according to claim 1, which is characterized in that the pick-up lens meets conditional：
1 ＜ f456/ f ＜ 2,
Wherein, f456Represent the combined focal length of the 4th lens, the 5th lens and the 6th lens, f represents entire institute
State the focal length of pick-up lens.
5. pick-up lens according to claim 1, which is characterized in that the pick-up lens meets conditional：
0.8 ＜ | R52|/f ＜ 3,
Wherein, | R52| represent the absolute value of the image side curvature radius of the 5th lens, f represents the entire pick-up lens
Focal length.
6. pick-up lens according to claim 1, which is characterized in that the pick-up lens meets conditional：
N1＜ 1.65, N2＞ 1.7, N3＞ 1.7,
Wherein, N1、N2、N3First lens, second lens, the refractive index of the 3rd lens are represented respectively.
7. pick-up lens according to claim 1, which is characterized in that the pick-up lens meets conditional：
V1＞ 55, V4＜ 30, V5＞ 60,
Wherein, V1、V4、V5First lens, the 4th lens, the Abbe number of the 5th lens are represented respectively.
8. pick-up lens according to claim 1, which is characterized in that the pick-up lens meets conditional：
F/D ＜ 1.8,
Wherein, f represents the focal length of the entire pick-up lens, and D represents the entrance pupil bore of the entire pick-up lens.
9. pick-up lens according to claim 1, which is characterized in that the pick-up lens further includes optical filter, the filter
Mating plate is located at the 6th lens close to the one side of imaging surface.
10. pick-up lens according to claim 9, which is characterized in that the optical filter for infrared cut of light optical filter or
Any one among smalt optical filter.
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| CN201711449440.5A CN108051899B (en) | 2017-12-27 | 2017-12-27 | Image pickup lens |
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| CN201711449440.5A CN108051899B (en) | 2017-12-27 | 2017-12-27 | Image pickup lens |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109407279A (en) * | 2018-12-12 | 2019-03-01 | 江西联创电子有限公司 | Wide-angle lens and imaging device |
| WO2020103555A1 (en) * | 2018-11-23 | 2020-05-28 | 江西联创电子有限公司 | Optical imaging lens and imaging device |
| CN113467046A (en) * | 2020-03-30 | 2021-10-01 | 华为技术有限公司 | Optical lens, camera module and detector |
| CN113866936A (en) * | 2020-06-30 | 2021-12-31 | 华为技术有限公司 | Optical lens, camera module and electronic equipment |
| CN114879344A (en) * | 2022-05-23 | 2022-08-09 | 东莞市宇瞳汽车视觉有限公司 | Fixed focus lens |
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