CN110109233A - Large aperture optical system and its camera module of application - Google Patents
Large aperture optical system and its camera module of application Download PDFInfo
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- CN110109233A CN110109233A CN201910451409.8A CN201910451409A CN110109233A CN 110109233 A CN110109233 A CN 110109233A CN 201910451409 A CN201910451409 A CN 201910451409A CN 110109233 A CN110109233 A CN 110109233A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 79
- 239000000463 material Substances 0.000 claims description 20
- 238000003384 imaging method Methods 0.000 claims description 4
- 238000009738 saturating Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 238000005286 illumination Methods 0.000 description 1
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Classifications
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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
Abstract
The embodiment of the invention discloses a kind of large aperture optical systems, successively include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens from object plane to image planes along optical axis；The object plane side of first lens is convex surface, and image planes side is concave surface, and focal power is negative；The object plane side of second lens is convex surface, and image planes side is concave surface, and focal power is negative；The object plane side of the third lens is concave surface, and image planes side is convex surface, and focal power is positive；4th lens are biconvex lens, and focal power is positive；5th power of lens is negative；6th lens are biconvex lens, and focal power is positive.On the other hand, the embodiment of the invention also provides a kind of camera modules.The embodiment of the present invention is mainly made of 6 pieces of lens, and lens piece number is few, and structure is simple, and cost is relatively low；Using the intercombination of different lens and reasonable distribution focal power, there are the optical properties such as large aperture, high pixel, low distortion and good athermal, be suitable for automotive field.
Description
Technical field:
It is especially a kind of applied to the big of automotive field the present invention relates to a kind of optical system and its camera module of application
Aperture optical system and its camera module of application.
Background technique:
With automobile safety driving system application with it is universal, the optical system or mould group of automotive field have also obtained generally
Using.And be applied to front truck anti-collision warning, orbit displacement early warning, pedestrian identify the demand of the application camera lens such as early warning also increasingly
It is more.Such optical system or mould group require to adapt under daytime and low light environment can blur-free imaging, therefore camera lens needs are examined
Consider large aperture；Meanwhile in order to meet the details identification to wide field range, therefore optical system or mould group need to have biggish view
Rink corner.And existing optical system or mould group applied to automotive field, generally existing eyeglass is excessive, complicated defect.
Summary of the invention:
To overcome the existing optical system applied to automotive field or mould group, generally existing eyeglass excessive, complicated
On the one hand problem, the embodiment of the present invention provide a kind of large aperture optical system.
A kind of large aperture optical system successively includes: the first lens, the second lens, third from object plane to image planes along optical axis
Lens, the 4th lens, the 5th lens and the 6th lens；
The object plane side of first lens is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of second lens is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of the third lens is concave surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 4th lens is convex surface, and image planes side is convex surface, and focal power is positive；
5th power of lens is negative；
The object plane side of 6th lens is convex surface, and image planes side is convex surface, and focal power is positive.
On the other hand, the embodiment of the invention also provides a kind of camera modules.
A kind of camera module includes at least optical lens, is equipped with large aperture optical system described above in optical lens
System.
The optical system and camera module of the embodiment of the present invention are mainly made of 6 pieces of lens, and lens piece number is few, structure letter
Single, cost is relatively low；Using different lens be combined with each other and reasonable distribution focal power, have large aperture, high pixel, it is low distortion and it is good
The optical properties such as good athermal are suitable for automotive field.
Detailed description of the invention:
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the structural schematic diagram one of optical system of the invention or camera module embodiment；
Fig. 2 is the distortion curve at+25 DEG C of optical system of the invention or camera module embodiment；
Fig. 3 is the MTF curve figure at+25 DEG C of optical system of the invention or camera module embodiment；
Fig. 4 is the relative illumination figure at+25 DEG C of optical system of the invention or camera module embodiment；
Fig. 5 is the MTF curve figure at -40 DEG C of optical system of the invention or camera module embodiment；
Fig. 6 is the MTF curve figure at+85 DEG C of optical system of the invention or camera module embodiment；
Fig. 7 is the structural schematic diagram two of optical system of the invention or camera module embodiment；
Fig. 8 is the structural schematic diagram three of optical system of the invention or camera module embodiment.
Specific embodiment:
In order to which the technical problems, technical solutions and beneficial effects solved by the present invention is more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
When the embodiment of the present invention refers to the ordinal numbers such as " first ", " second ", unless based on context its express really it is suitable
The meaning of sequence, it should be understood that only play differentiation and be used.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
A kind of large aperture optical system 8 successively includes: the first lens 1, the second lens 2, from object plane to image planes along optical axis
Three lens 3, the 4th lens 4, the 5th lens 5 and the 6th lens 6.
The object plane side of first lens 1 is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of second lens 2 is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of the third lens 3 is concave surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 4th lens 4 is convex surface, and image planes side is convex surface, and focal power is positive；
The focal power of 5th lens 5 is negative；
The object plane side of 6th lens 6 is convex surface, and image planes side is convex surface, and focal power is positive.
The optical system of the embodiment of the present invention is mainly made of 6 pieces of lens, and lens piece number is few, and structure is simple, cost compared with
It is low；Using the intercombination of different lens and reasonable distribution focal power, there is large aperture, high pixel, low distortion and good athermal
Etc. optical properties, be suitable for on-vehicle lens field.
Further, non-limiting as a kind of preferred embodiment of the invention, as shown in Figure 1,
The object plane side of first lens 1 is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of second lens 2 is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of the third lens 3 is concave surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 4th lens 4 is convex surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 5th lens 5 is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of 6th lens 6 is convex surface, and image planes side is convex surface, and focal power is positive.
Still further, it is non-limiting as another preferred embodiment of the invention, as shown in fig. 7,
The object plane side of first lens 1 is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of second lens 2 is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of the third lens 3 is concave surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 4th lens 4 is convex surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 5th lens 5 is concave surface, and image planes side is concave surface, and focal power is negative；
The object plane side of 6th lens 6 is convex surface, and image planes side is convex surface, and focal power is positive.
Further, non-limiting as another preferred embodiment of the invention, as shown in figure 8,
The object plane side of first lens 1 is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of second lens 2 is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of the third lens 3 is concave surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 4th lens 4 is convex surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 5th lens 5 is concave surface, and image planes side is convex surface, and focal power is negative；
The object plane side of 6th lens 6 is convex surface, and image planes side is convex surface, and focal power is positive.
Further, non-limiting as a kind of preferred embodiment of the invention, optical system meets TTL/EFL≤4,
Wherein TTL is the 1 object plane side vertex of the first lens of optical system the distance between to imaging surface 8, and EFL is the effective of optical system
Focal length.Structure is simple, compact, is combined with each other using different lens, has large aperture, high pixel, low distortion and good athermal
Etc. optical properties.
Still further, non-limiting as a kind of preferred embodiment of the invention, each lens of optical system meet
Following condition:
(1)-50<f1<-5；
(2)-50<f2<-5；
(3)5<f3<50；
(4)2<f4<10；
(5)-25<f5<-5；
(6)5<f6<50；
Wherein, f1 is the focal length of the first lens 1, and f2 is the focal length of the second lens 2, and f3 is the focal length of the third lens 3, and f4 is
The focal length of 4th lens 4, f5 are the focal length of the 5th lens 5, and f6 is the focal length of the 6th lens 6.It is combined with each other using different lens,
With optical properties such as large aperture, high pixel, low distortion and good athermals.
Further, non-limiting as a kind of preferred embodiment of the invention, each lens of optical system meet
Following condition:
(1)-5<f1/f<-0.5；
(2)-10<f2/f<-1.5；
(3)2<f3/f<15；
(4)0.3<f4/f<5；
(5)-5<f5/f<-0.5；
(6)0.5<f6/f<10；
Wherein, f is the focal length of entire optical system, and f1 is the focal length of the first lens 1, and f2 is the focal length of the second lens 2, f3
For the focal length of the third lens 3, f4 is the focal length of the 4th lens 4, and f5 is the focal length of the 5th lens 5, and f6 is the coke of the 6th lens 6
Away from.It is combined with each other using different lens, there are the optical properties such as large aperture, high pixel, low distortion and good athermal.
Further, non-limiting as a kind of preferred embodiment of the invention, the second lens 2, the third lens 3,
4th lens 4, the 6th lens 6 are non-spherical lens.It is combined with each other using different lens, there is large aperture, high pixel, low distortion
With the optical properties such as good athermal.Specifically, in present embodiment, the second lens 2, the third lens 3, the 6th lens 6 are preferably
For plastic aspheric lens；4th lens 4 are preferably glass aspheric lenses.
Still further, non-limiting, the Refractive Index of Material of the first lens 1 as a kind of preferred embodiment of the invention
Nd1, material Abbe constant Vd1 meet: 1.65 < Nd1 < 1.95,35 < Vd1 < 55.Structure is simple, it is ensured that good optical
Energy.
Further, non-limiting, the Refractive Index of Material of the second lens 2 as a kind of preferred embodiment of the invention
Nd2, material Abbe number Vd2 meet: 1.45 < Nd2 < 1.55,45 < Vd2 < 65.Structure is simple, it is ensured that good optical property.
Further, non-limiting, the Refractive Index of Material of the third lens 3 as a kind of preferred embodiment of the invention
Nd3, material Abbe number Vd3 meet: 1.50 < Nd3 < 1.75,20 < Vd3 < 40.Structure is simple, it is ensured that good optical property.
Still further, non-limiting, the Refractive Index of Material of the 4th lens 4 as a kind of preferred embodiment of the invention
Nd4, material Abbe number Vd4 meet: 1.45 < Nd4 < 1.75,40 < Vd4 < 80.Structure is simple, it is ensured that good optical property.
Further, non-limiting, the Refractive Index of Material of the 5th lens 5 as a kind of preferred embodiment of the invention
Nd5, material Abbe number Vd5 meet: 1.80 < Nd5 < 2.10,15 < Vd5 < 35.Structure is simple, it is ensured that good optical property.
Further, non-limiting, the Refractive Index of Material of the 6th lens 6 as a kind of preferred embodiment of the invention
Nd6, material Abbe number Vd6 meet: 1.45 < Nd6 < 1.75,30 < Vd6 < 60.Structure is simple, it is ensured that good optical property.
Still further, as the preferred embodiment of this programme and it is non-limiting, it is saturating that the diaphragm 7 of optical system is located at third
Between mirror 3 and the 4th lens 4.Structure is simple, for adjusting the intensity of light beam.
Further, non-limiting as the preferred embodiment of this programme, it is equipped between the 6th lens 6 and image planes 8 red
Outer edge filter is used to end infrared light by visible light, prevents red exposure.
Specifically, non-limiting, the optical system of the embodiment of the present invention as a kind of preferred embodiment of the invention, the
The focal length f1=-18.47mm, the focal length f2=-26.16mm of the second lens 2, the focal length f3=of the third lens 3 of one lens 1
36.58mm, the focal length f4=5.27mm of the 4th lens 4, the focal length f5=-9.64mm of the 5th lens 5, the focal length of the 6th lens 6
Every basic parameter of f6=28.21, this optical system are as shown in the table:
In upper table, along optical axis from object plane to image planes, S1, S2 correspond to two surfaces of the first lens 1；S3, S4 are corresponded to
Two surfaces of the second lens 2；S5, S6 correspond to two surfaces of the third lens 3；STO corresponds to optical system aperture diaphragm 7
Position；S8, S9 correspond to two surfaces of the 4th lens 4；S10, S11 correspond to two surfaces of the 5th lens 5；S12,
S13 corresponds to two surfaces of the 6th lens 6；S14, S15 correspond to the infrared cutoff between the 6th lens 6 and image planes 8
Two surfaces of optical filter；S16 corresponds to Sensor imaging surface 8.
Further, non-limiting as a kind of preferred embodiment of the invention, the second lens 2, the third lens 3,
4th lens 4, the 6th lens 6 surface be aspherical shape, meet following equation:
Wherein, parameter c=1/R, as curvature corresponding to radius, y are radial coordinate, unit and length of lens unit
Identical, k is circular cone whose conic coefficient, a1To a8Coefficient corresponding to respectively each radial coordinate.Second lens 2, third
Lens 3, the 4th lens 4, the aspherical correlation values of the 6th lens 6 are as shown in the table:
As can be seen that the optical system in the present embodiment has extraordinary athermal performance in from Fig. 2 to Fig. 6.Using
It is optical that different lens combinations and reasonable distribution focal power realize large aperture, high pixel, low distortion and good athermal etc.
Energy.
A kind of camera module includes at least optical lens, is equipped with large aperture optical system described above in optical lens
System.
The camera module of the embodiment of the present invention is mainly made of 6 pieces of lens, and lens piece number is few, and structure is simple, cost compared with
It is low；Using the intercombination of different lens and reasonable distribution focal power, there is large aperture, high pixel, low distortion and good athermal
Etc. optical properties, be suitable for automotive field.
It is the one or more embodiments provided in conjunction with particular content as described above, does not assert specific reality of the invention
It applies and is only limited to these instructions.It is all approximate with method of the invention, structure etc., identical, or for present inventive concept under the premise of
Several technology deduction or replace are made, all should be considered as protection scope of the present invention.
Claims (10)
- It successively include: that the first lens, the second lens, third are saturating from object plane to image planes along optical axis 1. a kind of large aperture optical system Mirror, the 4th lens, the 5th lens and the 6th lens；It is characterized in that,The object plane side of first lens is convex surface, and image planes side is concave surface, and focal power is negative；The object plane side of second lens is convex surface, and image planes side is concave surface, and focal power is negative；The object plane side of the third lens is concave surface, and image planes side is convex surface, and focal power is positive；The object plane side of 4th lens is convex surface, and image planes side is convex surface, and focal power is positive；5th power of lens is negative；The object plane side of 6th lens is convex surface, and image planes side is convex surface, and focal power is positive.
- 2. large aperture optical system as described in claim 1, which is characterized in that optical system meets TTL/EFL≤4, wherein TTL is the first lens object plane side vertex of optical system the distance between to imaging surface, and EFL is the effective focal length of optical system.
- 3. large aperture optical system as described in claim 1, which is characterized in that each lens of optical system meet following item Part:(1)-50<f1<-5；(2)-50<f2<-5；(3)5<f3<50；(4)2<f4<10；(5)-25<f5<-5；(6)5<f6<50；Wherein, f1 is the focal length of the first lens, and f2 is the focal length of the second lens, and f3 is the focal length of the third lens, and f4 is the 4th saturating The focal length of mirror, f5 are the focal length of the 5th lens, and f6 is the focal length of the 6th lens.
- 4. large aperture optical system as described in claim 1, which is characterized in that each lens of optical system meet following item Part:(1)-5<f1/f<-0.5；(2)-10<f2/f<-1.5；(3)2<f3/f<15；(4)0.3<f4/f<5；(5)-5<f5/f<-0.5；(6)0.5<f6/f<10；Wherein, f is the focal length of entire optical system, and f1 is the focal length of the first lens, and f2 is the focal length of the second lens, and f3 is third The focal length of lens, f4 are the focal length of the 4th lens, and f5 is the focal length of the 5th lens, and f6 is the focal length of the 6th lens.
- 5. large aperture optical system as described in claim 1, which is characterized in that the second lens, the third lens, the 4th lens, 6th lens are non-spherical lens.
- 6. large aperture optical system as claimed in any one of claims 1 to 5, which is characterized in that the material of the first lens reflects Rate Nd1, material Abbe constant Vd1 meet: 1.65 < Nd1 < 1.95,35 < Vd1 < 55.
- 7. large aperture optical system as claimed in any one of claims 1 to 5, which is characterized in that the material of the second lens reflects Rate Nd2, material Abbe number Vd2 meet: 1.45 < Nd2 < 1.55,45 < Vd2 < 65.
- 8. large aperture optical system as claimed in any one of claims 1 to 5, which is characterized in that the material of the third lens reflects Rate Nd3, material Abbe number Vd3 meet: 1.50 < Nd3 < 1.75,20 < Vd3 < 40.
- 9. large aperture optical system as claimed in any one of claims 1 to 5, which is characterized in that the material of the 4th lens reflects Rate Nd4, material Abbe number Vd4 meet: 1.45 < Nd4 < 1.75,40 < Vd4 < 80.
- 10. a kind of camera module includes at least optical lens, which is characterized in that be equipped with claim 1-9 in optical lens and appoint Large aperture optical system described in one.
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| CN111929874A (en) * | 2020-09-22 | 2020-11-13 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
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| CN113866938B (en) * | 2021-09-03 | 2024-05-03 | 广东弘景光电科技股份有限公司 | Vehicle-mounted side-view optical system and camera module applying same |
| CN114217416A (en) * | 2021-12-28 | 2022-03-22 | 江西联创电子有限公司 | Optical lens |
| CN114217416B (en) * | 2021-12-28 | 2023-11-14 | 江西联创电子有限公司 | optical lens |
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