CN108535834A - optical lens and imaging device - Google Patents
optical lens and imaging device Download PDFInfo
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- CN108535834A CN108535834A CN201710116963.1A CN201710116963A CN108535834A CN 108535834 A CN108535834 A CN 108535834A CN 201710116963 A CN201710116963 A CN 201710116963A CN 108535834 A CN108535834 A CN 108535834A
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- lens
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- optical lens
- object side
- image side
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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
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
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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
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- 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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The present invention provides optical lens and imaging device.The optical lens includes successively from the object side to image side：First lens, the object side for the meniscus shaped lens with negative power, the first lens is convex surface, and image side surface is concave surface；Second lens, the object side for the meniscus shaped lens with negative power, the second lens is concave surface, and image side surface is convex surface；The third lens, for the biconvex lens with positive light coke；4th lens；5th lens, with the 4th lens gluing；6th lens have positive light coke.By optical lens according to the present invention and imaging device, it can ensure preferable temperature performance, and reduce camera lens cost and weight while obtaining good image quality using plastic lens.
Description
Technical field
The present invention relates to the fields of optical lens and imaging device.
Background technology
Imaging device, such as the mobile device of camera and digital stationary cameras are installed, use such as charge-coupled device
It has been known that part (CCD) and complementary metal oxide semiconductor (CMOS), which are used as solid-state imaging element, such imaging device,
's.
With development in science and technology, the resolving power requirement of optical lens is higher and higher.And to monitoring camera or on-vehicle lens this
For the camera lens that class works in an outdoor environment, it is more harsh as requiring to reach such solution.Because monitoring camera is vehicle-mounted
The working environment of camera lens is changeable, and hot high temperature day, cold sleet sky are required for keeping perfectly solving image sharpness.
In particular, vehicle-mounted front view lens are related to active safety, influence of the temperature to lens imaging, typically back focus offset amount
Control it is stringenter.Since temperature is affected to the performance parameter of plastic lens, it is easy to influence the image quality of camera lens, because
And common vehicle-mounted front view lens are generally free of plastic lens, and use glass lens so that camera lens weight penalty, and to reach
To high resolving power, cost can be substantially improved.
Meanwhile vehicle-mounted front view lens are usually required that and are looked far, detection front long-path bearing object, corresponding lens focus compared with
It is long, but the angle of view is limited so that the field angle of camera lens is small.Therefore conventional vehicle-mounted front view lens field angle is small, needs
The wide-angle lens for coordinating big visual field scope simultaneously to expand whole observation visual field, and combines software to complete picture split.
Accordingly, there exist the needs for improved optical lens and imaging device.
Invention content
It is an object of the invention to the defects of for the above-mentioned prior art and insufficient, provide it is novel and it is improved can
The optical lens and imaging device of good temperature performance are kept while using plastic lens.
It is an object of the present invention to provide a kind of optical lens and imaging devices, are set by the shape of each lens
Set and focal power setting it is reasonably combined, improve resolving power when using plastic lens and be affected by temperature big problem, make
Obtaining optical lens has good temperature performance, and reduces the cost and weight of optical lens.
It is an object of the present invention to provide a kind of optical lens and imaging devices, are arranged by the shape of each lens
Big field angle is realized, to expand whole observation visual field.
It is an object of the present invention to provide a kind of optical lens and imaging devices, are arranged by the shape of each lens
Realize the miniaturization of optical lens.
According to an aspect of the present invention, a kind of optical lens is provided, includes successively from the object side to image side：First lens,
Object side for the meniscus shaped lens with negative power, first lens is convex surface, and image side surface is concave surface；Second lens,
Object side for the meniscus shaped lens with negative power, second lens is concave surface, and image side surface is convex surface；The third lens,
For the biconvex lens with positive light coke；4th lens；5th lens, with the 4th lens gluing；6th lens have positive light focus
Degree.
In above-mentioned optical lens, the 6th lens dipped beam axis object side is convex surface, and dipped beam axis image side surface is concave surface, institute
It is convex surface to state the 6th lens distance light axis object side, and distance light axis image side surface is concave surface.
In above-mentioned optical lens, there are plastic lens, plastics saturating in the first lens to the 6th lens of the optical lens
The number of mirror is less than or equal to 2.
In above-mentioned optical lens, first lens and the 6th lens are non-spherical lenses.
In above-mentioned optical lens, both second lens and the 6th lens are one is plastic lens or both is equal
For plastic lens, the plastic lens is aspherical.
In above-mentioned optical lens, the 4th lens are the biconvex lens for having positive light coke, and the 5th lens are
Biconcave lens with negative power.
In above-mentioned optical lens, the 4th lens are the biconcave lens for having negative power, and the 5th lens are
Biconvex lens with positive light coke.
In above-mentioned optical lens, further comprise that diaphragm, the diaphragm are located at the third lens and the described 4th thoroughly
Between mirror.
In above-mentioned optical lens, first lens meet the following conditions expression formula (1) to the 6th lens：
-7.5≤F2/F≤-3.5 (1)
Wherein, F2 is the focal length of second lens, and F is the whole group focal length value of the optical lens.
In above-mentioned optical lens, first lens meet the following conditions expression formula (2) to the 6th lens：
2.5≤F6/F≤6.5 (2)
Wherein, F6 is the focal length of the 6th lens, and F is the whole group focal length value of the optical lens.
In above-mentioned optical lens, first lens meet the following conditions expression formula (3) to the 6th lens：
FOV≥85 (3)
Wherein FOV is the field angle of the optical lens.
In above-mentioned optical lens, first lens meet the following conditions expression formula (4) to the 6th lens：
4.5≤TTL/F≤7 (4)
Wherein, TTL is the optical length of the optical lens.
In above-mentioned optical lens, the third lens are made of the low Abbe number material of high refractive index.
According to another aspect of the present invention, a kind of imaging device is provided, including above-mentioned optical lens and for by institute
The optical imagery for stating optical lens formation is converted to the image-forming component of electric signal.
Above-mentioned optical lens and imaging device provided by the invention can improve the optical of camera lens using plastic lens
While energy, it is arranged by the shape of eyeglass, the focal power setting of glass lens is reasonably combined with other lens powers,
So that optical lens has preferable temperature performance, and reduce cost and weight.
Also, optical lens provided by the invention and imaging device realize big field angle, expand whole observation visual field.
In addition, optical lens provided by the invention and imaging device realize the miniaturization of camera lens.
Description of the drawings
Fig. 1 illustrates the lens configuration of optical lens according to a first embodiment of the present invention；
The lens configuration of the optical lens of Fig. 2 diagrams according to a second embodiment of the present invention；
The lens configuration of the optical lens of Fig. 3 diagrams according to a third embodiment of the present invention；
The lens configuration of the optical lens of Fig. 4 diagrams according to a fourth embodiment of the present invention；
Fig. 5 A are the imaging effect schematic diagram of the optical lens of first embodiment of the invention at normal temperatures；
Fig. 5 D are the imaging effect schematic diagram of the optical lens of first embodiment of the invention at high temperature；
Fig. 5 B, Fig. 5 C are the imaging effect schematic diagram of the optical lens of the prior art at high temperature；
Fig. 6 is the schematic block diagram of imaging device according to the ... of the embodiment of the present invention.
Specific implementation mode
It is described below for the open present invention so that those skilled in the art can realize the present invention.It is excellent in being described below
Embodiment is selected to be only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.It defines in the following description
The present invention basic principle can be applied to other embodiments, deformation scheme, improvement project, equivalent program and do not carry on the back
Other technologies scheme from the spirit and scope of the present invention.
The term and word used in following description and claim is not limited to literal meaning, but only by the present inventor
The present invention can be understood and consistently understand by being used so that.Therefore, to those skilled in the art clearly only for explanation
Purpose rather than provide this hair for the limitation purpose of the present invention such as defined in appended claims and their equivalent
Bright various embodiments are described below.
Term used herein is only used for describing the purpose of various embodiments and is not intended to limit.As used herein,
Singulative is intended to also include plural form, makes an exception unless the context clearly dictates.Will further be understood that term " comprising " and/or
" having " specifies depositing for the feature, number, step, operation, component, element or combinations thereof when being used in this specification
, and it is not excluded for the presence or additional of one or more of the other feature, number, step, operation, component, element or its group.
Term used herein including technical and scientific term has and the normally understood art of those skilled in the art
The identical meaning of language, only if it were not for being defined differently than the term.It should be understood that the term tool limited in usually used dictionary
There is the meaning consistent with the meaning of term in the prior art.
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments：
[configuration of optical lens]
Optical lens according to the ... of the embodiment of the present invention includes successively from the object side to image side：First lens, to have negative light focus
The object side of the meniscus shaped lens of degree, first lens is convex surface, and image side surface is concave surface；Second lens, to have negative light focus
The object side of the meniscus shaped lens of degree, second lens is concave surface, and image side surface is convex surface；The third lens, to have positive light focus
The biconvex lens of degree；4th lens；5th lens, with the 4th lens gluing；6th lens have positive light coke.
Wherein, the second lens are preferably non-spherical lens, it is highly preferred that second lens can be close to concentric circles
Non-spherical lens.
Wherein, the 4th lens and the 5th lens have reciprocal focal power.For example, when the 4th lens have positive light focus
When spending, the 5th lens have negative power, and when the 4th lens have negative power, the 5th lens have positive light coke.And
And the 4th lens and the 5th lens of gluing have reciprocal concaveconvex shape each other.For example, when the 4th lens are lenticulars
When mirror, the 5th lens are biconcave lens, and when the 4th lens are biconcave lens, the 5th lens are biconvex lens.
Wherein, the 6th lens dipped beam axis object side is convex surface, and dipped beam axis image side surface is concave surface.Preferably, described
Six lens distance light axis object sides are also convex surface, and distance light axis image side surface is also concave surface.
Shape setting by said lens and focal power setting, can use one or more in the first to the 6th lens
A plastic lens, to while obtaining good image quality using plastic lens, ensure preferable temperature performance.
Preferably, in optical lens according to the ... of the embodiment of the present invention, the number of plastic lens is less than or equal to two.
Preferably, in above-mentioned optical lens, the second lens and the 6th lens are non-spherical lenses.
Preferably, in above-mentioned optical lens, both the second lens and the 6th lens are one is plastic lens or both is equal
To be plastic lens.According to an embodiment of the invention, second lens and the 6th lens are plastic lens, the modeling
Expect that lens are aspherical.,
Preferably, the first lens meet the following conditions expression formula (1) to the 6th lens：
-7.5≤F2/F≤-3.5 (1)
F2 is the focal length of the second lens, and F is the whole group focal length value of optical lens.
Preferably, the first lens meet the following conditions expression formula (2) to the 6th lens：
2.5≤F6/F≤6.5 (2)
F6 is the focal length of the 6th lens, and F is the whole group focal length value of optical lens.
In this way, optical lens according to the ... of the embodiment of the present invention can use plastic lens in multiple lens, especially
It when applied to vehicle-mounted front view lens, may be implemented largely to be plasticized, solve vehicle-mounted front view lens and be related to active safety, and
Plastic lens can not be used, thus the problem of image quality can not be improved while cost is reduced.
In optical lens according to the ... of the embodiment of the present invention, although having used plastic lens, pass through each lens
Shape is arranged, the focal power setting of plastic lens, and reasonably combined with other power of lens, improves using plastics
Lens are affected by temperature resolving power big problem so that optical lens has good temperature performance, and reduces optical frames
The cost and weight of head.
In above-mentioned optical lens, the first lens meet the following conditions expression formula (3) to the 6th lens：
FOV≥85 (3)
Wherein FOV is the field angle of optical lens.
In this way, in optical lens according to the ... of the embodiment of the present invention, big field angle is realized, to expand whole sight
Examine visual field.Therefore, when applied to vehicle-mounted front view lens, because the wide-angle lens of big visual field scope need not be coordinated to expand
Whole observation visual field can further save the camera lens cost of the driving assistance system using vehicle-mounted front view lens.
In above-mentioned optical lens, the first lens meet the following conditions expression formula (4) to the 6th lens：
4.5≤TTL/F≤7 (4)
Wherein, TTL is the optical length of optical lens, i.e. the object side outermost point of the first lens to imaging focal plane away from
From.
Therefore, according to embodiments of the present invention, the optical lens of miniaturization can be obtained.
In the following, will be carried out to the first lens in optical lens according to the ... of the embodiment of the present invention to the 6th lens further
It is described in detail.
In optical lens according to the ... of the embodiment of the present invention, the first lens are the falcate shape for being convex to object side, object side
Face is convex surface, and image side surface is concave surface.First lens can make incident ray incidence angle on the face of meeting head-on towards object lateral bend
It is small, be conducive to collect the optical system that more light enter the embodiment of the present invention.In addition, when being applied to vehicle-mounted front view lens
When, convex surface is conducive to adapt to the outdoor application of vehicle-mounted front view lens.For example, when in the environment in such as rainy day, the convex surface
It can contribute to the landing of droplet.
In optical lens according to the ... of the embodiment of the present invention, the second lens are the falcate shape for being convex to image side, object side
Face is concave surface, and image side surface is convex surface.Because the first lens of optical lens are divergent lens, the bent moon of the second lens is utilized
Shape lens configure so that off-axis ray tendency is relatively gentle, so that light smooth transition is to rear.In addition, the second lens are
Non-spherical lens, it is aspherical that there is certain correction to off-axis point aberration.In addition it is highly preferred that the second lens can be close
The non-spherical lens of concentric circles is conducive to the design and processing of eyeglass, can reduce aspherical cost.
In optical lens according to the ... of the embodiment of the present invention, the third lens are biconvex lens, and object side is convex surface, image side
Face is also convex surface.The third lens are convergent lens, and compression light makes it gently by the third lens, increase system thang-kng
Amount.In addition, the third lens preferably select the low Abbe number material of high refractive index, generated with the first lens of compensation and the second lens
Aberration on axis.
In optical lens according to the ... of the embodiment of the present invention, glued the 4th lens and the 5th lens itself can be rectified each other
Positive aberration, while the 4th lens and the 5th lens cooperate, and can be compensated while compensating residual color and put monochrome on axis
Aberration.
In optical lens according to the ... of the embodiment of the present invention, the 6th lens are the falcate shape for being convex to object side, are aspheric
Face lens, dipped beam axis object side are convex surface, and dipped beam axis image side surface is concave surface.6th lens are positive lens so that light meeting
It is poly-, and better compensating action is played to off-axis point aberration using aspherical.Preferably, the 6th lens distance light axis object side
Also it is convex surface, distance light axis image side surface is also concave surface
In above-mentioned optical lens, further comprise diaphragm.Preferably, the diaphragm be located at the third lens and the 4th lens it
Between, the light to be conducive to enter optical system effectively collects, and reduces the eyeglass bore of optical system.Certainly, this field skill
Art personnel are appreciated that diaphragm can also be located between other arbitrary discrete lens.
In addition, in the case where optical lens according to the ... of the embodiment of the present invention includes diaphragm, the balance of system aberration is considered
Property and structure reasonability, glued each other the 4th lens and the 5th lens are preferably positioned close to the position of diaphragm.
Also, the third lens, which can compress light, makes it gently inject diaphragm, is conducive to increase diaphragm bore, increases system
System thang-kng amount.Moreover, the 6th lens can further decrease f-number FNO, increase system stop bore.
In optical lens according to the ... of the embodiment of the present invention, when using two panels plastic lens, this two panels plastic lens is
The principal element of burnt variation after influencing under different temperatures, to influence temperature performance.Therefore, emphasis distribution limits this two panels plastics
Lens, such as the second lens and the 6th power of lens coordinate so that entire optical system with the focal power of other glass lens
The temperature performance of system is promoted.
Here, it will be understood by those skilled in the art that optical lens according to the ... of the embodiment of the present invention is vehicle-mounted in addition to being applied to
Except front view lens, other camera lens applied fields for needing lightweight, low cost and improved temperature performance can also be applied to
It closes, the embodiment of the present invention is not intended to this progress any restrictions.
[Numerical examples of optical lens]
In the following, by refer to the attached drawing and table, the specific embodiment sum number of optical lens according to the ... of the embodiment of the present invention is described
It is worth example, in these Numerical examples, concrete numerical value is applied to corresponding embodiment.
The certain lens used in embodiment have non-spherical lenses surface, and aspherical face shape is by following formula (5)
It indicates：
Wherein, Z (h) be it is aspherical along optical axis direction at the position of height h, away from aspheric vertex of surface apart from rise.
C=1/r, r indicate that the radius of curvature of lens surface, k are circular cone coefficient, and A, B, C, D and E are high order aspheric surface system
It counts, the e in coefficient represents scientific notation, as E-05 indicates 10-5。
In addition, Nd indicates that refractive index, Vd indicate Abbe number.
First embodiment
As shown in Figure 1, optical lens according to a first embodiment of the present invention sequentially includes from the object side to image side：With negative light
First lens L1 of the falcate of focal power has and is convex to the first surface S1 of object side and concave towards the second surface S2 of image side, i.e., and the
The object side S1 of one lens L1 is convex surface, and image side surface S2 is concave surface；Second lens L2 of the falcate with negative power, has
It concaving towards the first surface S3 of object side and is convex to the second surface S4 of image side, i.e. the object side S3 of the second lens L2 is concave surface, as
Side S4 is convex surface；The third lens L3 of biconvex shape with positive light coke has and is convex to the first surface S5 of object side and convex
To the second surface S6 of image side；Diaphragm STO；Glued the 4th lens L4 and the 5th lens L5 each other, wherein the 4th lens L4 is
Bi-concave shape with negative power, the second surface S9 for having the first surface S8 for concaving towards object side and concaving towards image side, the 5th thoroughly
Mirror L5 is the biconvex shape with positive light coke, has the first surface S9 for being convex to object side and the second surface S10 for being convex to image side；
6th lens L6 of the falcate with positive light coke has and is convex to the first surface S11 of object side and concaves towards the second table of image side
Face S12；Planar lens L7 has the first surface S13 towards the object side and second surface S14 towards image side, generally colour filter
Piece；Planar lens L8 has the first surface S15 towards the object side and second surface S16 towards image side, generally protects glass
Glass, for protecting imaging surface；L9 has imaging surface S17, generally chip.
The lens data of said lens is shown in following table 1：
【Table 1】
| Surface | Radius of curvature | Thickness | Nd | Vd |
| 1 | 10.7812 | 0.9583 | 1.77 | 49.61 |
| 2 | 3.3542 | 3.3542 | ||
| 3 | -3.7892 | 1.7969 | 1.49 | 53.00 |
| 4 | -6.1202 | 0.1198 | ||
| 5 | 6.7239 | 2.5156 | 1.90 | 33.00 |
| 6 | -19.1067 | 0.8385 | ||
| STO | Infinitely | 0.3594 | ||
| 8 | -10.1196 | 0.7298 | 1.85 | 23.30 |
| 9 | 3.6489 | 2.4326 | 1.72 | 54.00 |
| 10 | -8.6357 | 0.1216 | ||
| 11 | 6.0815 | 1.4596 | 1.51 | 56.29 |
| 12 | 38.6782 | 1.1979 | ||
| 13 | Infinitely | 0.5500 | 1.52 | 64.21 |
| 14 | Infinitely | 5.2301 | ||
| 15 | Infinitely | 0.4000 | 1.52 | 64.21 |
| 16 | Infinitely | 0.1250 | ||
| IMA | Infinitely |
The circular cone coefficient k of the first surface S3 and S4 of second lens and the first surface S11 and S12 of the 6th lens and
High order aspheric surface coefficient A, B, C, D and E is as shown in the following Table 2.
【Table 2】
In optical lens according to a first embodiment of the present invention, the focal length F2 of the second lens, the focal length F6 of the 6th lens,
The whole group focal length value F of the optical lens and optical length TTL of optical lens and its between relationship it is as shown in the following Table 3.
【Table 3】
| F2 | -27.105869 |
| F6 | 13.826973 |
| F | 4.5791 |
| TTL | 22.1893 |
| F2/F | -5.9195 |
| F6/F | 3.01958 |
| TTL/F | 4.845778 |
It can see from upper table 3, optical lens according to a first embodiment of the present invention meets aforementioned condition expression formula
(1), (2) and (4), to realize the good temperature performance of optical lens and miniaturization.
Second embodiment
As shown in Fig. 2, optical lens according to a second embodiment of the present invention sequentially includes from the object side to image side：With negative light
First lens L1 of the falcate of focal power has and is convex to the first surface S1 of object side and concave towards the second surface S2 of image side, i.e., and the
The object side S1 of one lens L1 is convex surface, and image side surface S2 is concave surface；Second lens L2 of the falcate with negative power, has
It concaving towards the first surface S3 of object side and is convex to the second surface S4 of image side, i.e. the object side S3 of the second lens L2 is concave surface, as
Side S4 is convex surface；The third lens L3 of biconvex shape with positive light coke has and is convex to the first surface S5 of object side and convex
To the second surface S6 of image side；Diaphragm STO；Glued the 4th lens L4 and the 5th lens L5 each other, wherein the 4th lens L4 is
Bi-concave shape with negative power, the second surface S9 for having the first surface S8 for concaving towards object side and concaving towards image side, the 5th thoroughly
Mirror L5 is the biconvex shape with positive light coke, has the first surface S9 for being convex to object side and the second surface S10 for being convex to image side；
6th lens L6 of the falcate with positive light coke has and is convex to the first surface S11 of object side and concaves towards the second table of image side
Face S12；Planar lens L7 has the first surface S13 towards the object side and second surface S14 towards image side, generally colour filter
Piece；Planar lens L8 has the first surface S15 towards the object side and second surface S16 towards image side, generally protects glass
Glass, for protecting imaging surface；L9 has imaging surface S17, generally chip.
The lens data of said lens is shown in following table 4：
【Table 4】
| Surface | Radius of curvature | Thickness | Nd | Vd |
| 1 | 6.2839 | 0.7194 | 1.78 | 47.20 |
| 2 | 2.1307 | 2.5113 | ||
| 3 | -2.9641 | 1.7172 | 1.51 | 56.29 |
| 4 | -5.4697 | 0.3077 | ||
| 5 | 8.3262 | 1.8884 | 1.80 | 42.25 |
| 6 | -7.8630 | 0.9426 | ||
| STO | Infinitely | 0.1798 | ||
| 8 | -31.4196 | 0.5395 | 1.83 | 27.30 |
| 9 | 3.4978 | 1.4388 | 1.73 | 54.67 |
| 10 | -7.5613 | 0.0450 | ||
| 11 | 4.5517 | 1.0997 | 1.51 | 56.29 |
| 12 | 12.8821 | 0.2823 | ||
| 13 | Infinitely | 0.5500 | 1.52 | 64.21 |
| 14 | Infinitely | 3.1407 | ||
| 15 | Infinitely | 0.4000 | 1.52 | 64.20 |
| 16 | Infinitely | 0.1250 | ||
| IMA | Infinitely |
The circular cone coefficient k of the first surface S3 and S4 of second lens and the first surface S11 and S12 of the 6th lens and
High order aspheric surface coefficient A, B, C, D and E is as shown in the following Table 5.
【Table 5】
| Surface | k | A | B | C | D | E |
| 3 | -0.1821 | 6.9368E-03 | 1.6110E-06 | 3.1060E-05 | -5.2184E-06 | 4.8545E-07 |
| 4 | 0.1714 | 3.8661E-03 | 2.6660E-04 | -7.4007E-05 | 6.8174E-06 | -2.6206E-07 |
| 11 | 3.1477 | -7.2840E-04 | 1.1204E-03 | -5.6072E-04 | 3.1472E-04 | -3.1156E-05 |
| 12 | -36.3727 | 7.3956E-03 | 2.4493E-03 | -1.3296E-03 | 5.0840E-04 | -7.5995E-05 |
In optical lens according to a second embodiment of the present invention, the focal length F2 of the second lens, the focal length F6 of the 6th lens,
The whole group focal length value F of the optical lens and optical length TTL of optical lens and its between relationship it is as shown in the following Table 6.
【Table 6】
| F2 | -16.4041 |
| F6 | 13.10486 |
| F | 2.59347 |
| TTL | 15.8837 |
| F2/F | -6.3251512 |
| F6/F | 5.05302278 |
| TTL/F | 6.1244973 |
It can see from upper table 6, optical lens according to a second embodiment of the present invention meets aforementioned condition expression formula
(1), (2) and (4), to realize the good temperature performance of optical lens and miniaturization.
3rd embodiment
As shown in figure 3, optical lens according to a third embodiment of the present invention sequentially includes from the object side to image side：With negative light
First lens L1 of the falcate of focal power has and is convex to the first surface S1 of object side and concave towards the second surface S2 of image side, i.e., and the
The object side S1 of one lens L1 is convex surface, and image side surface S2 is concave surface；Second lens L2 of the falcate with negative power, has
It concaving towards the first surface S3 of object side and is convex to the second surface S4 of image side, i.e. the object side S3 of the second lens L2 is concave surface, as
Side S4 is convex surface；The third lens L3 of biconvex shape with positive light coke has and is convex to the first surface S5 of object side and convex
To the second surface S6 of image side；Diaphragm STO；Glued the 4th lens L4 and the 5th lens L5 each other, wherein the 4th lens L4 is
Biconvex shape with positive light coke, the second surface S9 for having the first surface S8 for being convex to object side and being convex to image side, the 5th thoroughly
Mirror L5 is the bi-concave shape with negative power, has and concaves towards the first surface S9 of object side and concave towards the second surface S10 of image side；
6th lens L6 of the falcate with positive light coke has and is convex to the first surface S11 of object side and concaves towards the second table of image side
Face S12；Planar lens L7 has the first surface S13 towards the object side and second surface S14 towards image side, generally colour filter
Piece；Planar lens L8 has the first surface S15 towards the object side and second surface S16 towards image side, generally protects glass
Glass, for protecting imaging surface；L9 has imaging surface S17, generally chip.
The lens data of said lens is shown in following table 7：
【Table 7】
| Surface | Radius of curvature | Thickness | Nd | Vd |
| 1 | 12.9441 | 1.1261 | 1.77 | 52.30 |
| 2 | 3.5424 | 4.9668 | ||
| 3 | -4.4869 | 2.0411 | 1.51 | 56.29 |
| 4 | -8.4750 | 1.3105 | ||
| 5 | 9.8538 | 2.9561 | 1.90 | 31.32 |
| 6 | -15.0924 | 0.1402 | ||
| STO | Infinitely | 0.0000 | ||
| 8 | 16.4157 | 2.8154 | 1.74 | 49.00 |
| 9 | -3.5556 | 0.8446 | 1.85 | 23.79 |
| 10 | 84.4608 | 1.3826 | ||
| 11 | 8.9959 | 1.7596 | 1.51 | 56.29 |
| 12 | 703.8399 | 1.4077 | ||
| 13 | Infinitely | 0.5500 | 1.52 | 64.21 |
| 14 | Infinitely | 2.3238 | ||
| 15 | Infinitely | 0.4000 | 1.52 | 64.21 |
| 16 | Infinitely | 0.1250 | ||
| IMA | Infinitely |
The circular cone coefficient k of the first surface S3 and S4 of second lens and the first surface S11 and S12 of the 6th lens and
High order aspheric surface coefficient A, B, C, D and E is as shown in the following Table 8.
【Table 8】
| Surface | k | A | B | C | D | E |
| 3 | 0.3931 | 3.7310E-03 | 5.7307E-06 | 7.3070E-06 | -6.5636E-07 | 3.9665E-08 |
| 4 | 7.7359 | 2.0794E-03 | 9.4834E-05 | -1.5058E-05 | 1.2450E-06 | -3.6268E-08 |
| 11 | 2.8815 | -1.8987E-04 | 1.1206E-04 | -2.4338E-05 | 4.0183E-06 | -2.2517E-07 |
| 12 | 7339.6910 | 1.9278E-03 | 2.4243E-05 | -5.7708E-05 | 8.0831E-06 | -4.4634E-09 |
In optical lens according to a third embodiment of the present invention, the focal length F2 of the second lens, the focal length F6 of the 6th lens,
The whole group focal length value F of the optical lens and optical length TTL of optical lens and its between relationship it is as shown in the following Table 6.
【Table 9】
| F2 | -22.4484 |
| F6 | 17.71066 |
| F | 3.57312 |
| TTL | 24.1495 |
| F2/F | -6.2825866 |
| F6/F | 4.95663622 |
| TTL/F | 6.7586591 |
It can see from upper table 9, optical lens according to a third embodiment of the present invention meets aforementioned condition expression formula
(1), (2) and (4), to realize the good temperature performance of optical lens and miniaturization.
Fourth embodiment
As shown in figure 4, optical lens according to a fourth embodiment of the present invention sequentially includes from the object side to image side：With negative light
First lens L1 of the falcate of focal power has and is convex to the first surface S1 of object side and concave towards the second surface S2 of image side, i.e., and the
The object side S1 of one lens L1 is convex surface, and image side surface S2 is concave surface；Second lens L2 of the falcate with negative power, has
It concaving towards the first surface S3 of object side and is convex to the second surface S4 of image side, i.e. the object side S3 of the second lens L2 is concave surface, as
Side S4 is convex surface；The third lens L3 of biconvex shape with positive light coke has and is convex to the first surface S5 of object side and convex
To the second surface S6 of image side；Diaphragm STO；Glued the 4th lens L4 and the 5th lens L5 each other, wherein the 4th lens L4 is
Bi-concave shape with negative power, the second surface S9 for having the first surface S8 for concaving towards object side and concaving towards image side, the 5th thoroughly
Mirror L5 is the biconvex shape with positive light coke, has the first surface S9 for being convex to object side and the second surface S10 for being convex to image side；
6th lens L6 of the falcate with positive light coke has and is convex to the first surface S11 of object side and concaves towards the second table of image side
Face S12；Planar lens L7 has the first surface S13 towards the object side and second surface S14 towards image side, generally colour filter
Piece；Planar lens L8 has the first surface S15 towards the object side and second surface S16 towards image side, generally protects glass
Glass, for protecting imaging surface；L9 has imaging surface S17, generally chip.
The lens data of said lens is shown in following table 10：
【Table 10】
| Surface | Radius of curvature | Thickness | Nd | Vd |
| 1 | 10.2972 | 0.7701 | 1.77 | 49.61 |
| 2 | 2.2595 | 2.5472 | ||
| 3 | -2.4899 | 1.5124 | 1.51 | 56.29 |
| 4 | -4.7141 | 0.6050 | ||
| 5 | 9.2875 | 1.6365 | 1.80 | 42.25 |
| 6 | -7.7862 | 1.2494 | ||
| STO | Infinitely | 0.1925 | ||
| 8 | -19.2530 | 0.5776 | 1.85 | 23.79 |
| 9 | 3.7713 | 1.4440 | 1.73 | 54.67 |
| 10 | -7.5019 | 0.0481 | ||
| 11 | 4.9678 | 1.0589 | 1.51 | 56.29 |
| 12 | 14.8198 | 0.7835 | ||
| 13 | Infinitely | 0.5500 | 1.52 | 64.21 |
| 14 | Infinitely | 4.7603 | ||
| 15 | Infinitely | 0.4000 | 1.52 | 64.21 |
| 16 | Infinitely | 0.1250 | ||
| IMA | Infinitely |
The circular cone coefficient k of the first surface S3 and S4 of second lens and the first surface S11 and S12 of the 6th lens and
High order aspheric surface coefficient A, B, C, D and E is as shown in the following Table 11.
【Table 11】
| Surface | k | A | B | C | D | E |
| 3 | -0.5935 | 1.1666E-02 | 2.6220E-06 | 1.0447E-04 | -2.0066E-05 | 2.5929E-06 |
| 4 | 0.1717 | 8.7439E-03 | 6.3407E-04 | -2.1529E-05 | 6.0599E-05 | -4.8028E-06 |
| 11 | 2.9703 | -5.9369E-04 | 7.3712E-04 | -3.4795E-04 | 1.2284E-04 | -1.4720E-05 |
| 12 | -55.2699 | 6.0278E-03 | 1.7419E-03 | -8.3810E-04 | 2.7528E-05 | -2.9178E-06 |
In optical lens according to a fourth embodiment of the present invention, the focal length F2 of the second lens, the focal length F6 of the 6th lens,
The whole group focal length value F of the optical lens and optical length TTL of optical lens and its between relationship it is as shown in the following Table 12.
【Table 12】
It can see from upper table 12, optical lens according to a fourth embodiment of the present invention meets aforementioned condition expression formula
(1), (2) and (4), to realize the good temperature performance of optical lens and miniaturization.
Imaging effect
The point range figure of Fig. 5 A to Fig. 5 D represents spot condition of the light in imaging surface of different wave length.Usual field angle is got over
Greatly, surrounding visual field position aberration is bigger, and light gathering is weaker, and image quality declines compared with center.
Fig. 5 A show the camera lens surrounding visual field position involved by the optical lens of first embodiment of the invention under room temperature
Point range figure.As shown in Figure 5A, disc of confusion is concentrated, under white light can optically focused well, the image quality of image is excellent, resolving power compared with
It is good.
It is if using 3 or 3 or more plastic aspheric lens, because of plastic lens under high temperature as Fig. 5 B are corresponding
Optimum image plane offset caused by expansion is excessive, the point range figure on identical periphery imaging surface.As shown in Figure 5 B, disc of confusion disperses,
Condenser performance is poor under white light, and the image quality of image is poor, and resolving power is low.
It is that the optical lens of the smaller position range of field angle in the prior art can reach at high temperature as Fig. 5 C are corresponding
Effect.As shown in Figure 5 C, disc of confusion is more concentrated, and the image quality of image is fine.
As Fig. 5 D are corresponding be first embodiment of the invention optical lens can using 2 plastic lens the case where
Under, and expand field angle after surrounding visual field position still be able to achieve the effect that at high temperature it is as follows.As shown in Figure 5 D, disc of confusion
It more concentrates, the image quality of image is preferable.
In conclusion optical lens according to the ... of the embodiment of the present invention can improve the optical of camera lens using plastic lens
While energy, it is arranged by the shape of eyeglass, the focal power setting of glass lens is reasonably combined with other lens powers,
So that optical lens has preferable temperature performance, and reduce cost and weight.
Also, optical lens according to the ... of the embodiment of the present invention realizes big field angle, expands whole observation visual field.
In addition, optical lens according to the ... of the embodiment of the present invention realizes the miniaturization of camera lens.
[configuration of imaging device]
Another aspect according to the ... of the embodiment of the present invention, provides a kind of imaging device, including optical lens and for by light
The image-forming component that the optical imagery that camera lens is formed is converted to electric signal is learned, which includes successively from the object side to image side：The
One lens, the object side for the meniscus shaped lens with negative power, first lens is convex surface, and image side surface is concave surface；The
Two lens, the object side for the meniscus shaped lens with negative power, second lens is concave surface, and image side surface is convex surface；The
Three lens, for the biconvex lens with positive light coke；4th lens；5th lens, with the 4th lens gluing；6th lens, tool
There is positive light coke.
Fig. 6 is the schematic block diagram of imaging device according to the ... of the embodiment of the present invention.As shown in fig. 6, being implemented according to the present invention
The imaging device 100 of example includes optical lens 101 and image-forming component 102.Wherein, the optical lens 101 is for acquiring subject
Optical imagery, and the image-forming component 102 is used to the optical imagery that the optical lens 101 absorbs being converted to electric signal.
In above-mentioned optical lens, the 6th lens dipped beam axis object side is convex surface, and dipped beam axis image side surface is concave surface, institute
It is convex surface to state the 6th lens distance light axis object side, and distance light axis image side surface is concave surface.
In above-mentioned optical lens, there are plastic lens, plastics saturating in the first lens to the 6th lens of the optical lens
The number of mirror is less than or equal to 2.
In above-mentioned optical lens, first lens and the 6th lens are non-spherical lenses.
In above-mentioned optical lens, both second lens and the 6th lens are one is plastic lens or both is equal
For plastic lens, the plastic lens is aspherical.
In above-mentioned imaging device, the 4th lens are the biconvex lens for having positive light coke, and the 5th lens are that have
The biconcave lens of negative power.
In above-mentioned imaging device, the 4th lens are the biconcave lens for having negative power, and the 5th lens are that have
The biconvex lens of positive light coke.
In above-mentioned optical lens, further comprise that diaphragm, the diaphragm are located at the third lens and the described 4th thoroughly
Between mirror.
In above-mentioned imaging device, which meets the following conditions expression formula (1) to the 6th lens：
-7.5≤F2/F≤-3.5 (1)
Wherein, F2 is the focal length of second lens, and F is the whole group focal length value of the optical lens.
In above-mentioned optical lens, first lens meet the following conditions expression formula (2) to the 6th lens：
2.5≤F6/F≤6.5 (2)
Wherein, F6 is the focal length of the 6th lens, and F is the whole group focal length value of the optical lens.
In above-mentioned imaging device, which meets the following conditions expression formula (3) to the 6th lens：
FOV≥85 (3)
Wherein FOV is the field angle of the optical lens.
In above-mentioned imaging device, which meets the following conditions expression formula (4) to the 6th lens：
4.5≤TTL/F≤7 (4)
Wherein, TTL is the optical length of the optical lens.
In above-mentioned imaging device, which is made of the low Abbe number material of high refractive index.
Here, it will be understood by those skilled in the art that optical lens in imaging device according to the ... of the embodiment of the present invention
With between about identical described in optical lens according to the ... of the embodiment of the present invention, and above-mentioned hair may be used in other details
Bright first embodiment therefore traces in order to avoid redundancy and no longer to the Numerical examples of the optical lens of fourth embodiment.
Optical lens and imaging device according to the ... of the embodiment of the present invention can be in the optics for improving camera lens using plastic lens
While performance, it is arranged by the shape of eyeglass, the focal power setting of glass lens, with rationally taking for other lens powers
Match so that optical lens has preferable temperature performance, and reduces cost and weight.
Also, optical lens according to the ... of the embodiment of the present invention and imaging device realize big field angle, expand whole sight
Examine visual field.
In addition, optical lens according to the ... of the embodiment of the present invention and imaging device realize the miniaturization of camera lens.
In optical lens according to the ... of the embodiment of the present invention and imaging device, it can also arrange and there is no the lens number of degrees
Lens.Therefore, other than above-described first lens to the 6th lens, other lens can also be arranged.This
In the case of, optical lens and imaging device according to the ... of the embodiment of the present invention can configure there are six or six or more lens,
And these lens include the supplementary lens of the arrangement other than above-mentioned first lens to the 6th lens.
It should be understood by those skilled in the art that the embodiment of the present invention shown in foregoing description and attached drawing is only used as illustrating
And it is not intended to limit the present invention.The purpose of the present invention has been fully and effectively achieved.The function and structural principle of the present invention exists
It shows and illustrates in embodiment, under without departing from the principle, embodiments of the present invention can have any deformation or modification.
Claims (13)
1. a kind of optical lens, includes successively from the object side to image side：
First lens, the object side for the meniscus shaped lens with negative power, first lens is convex surface, and image side surface is recessed
Face；
Second lens, the object side for the meniscus shaped lens with negative power, second lens is concave surface, and image side surface is convex
Face；
The third lens, for the biconvex lens with positive light coke；
4th lens；
5th lens, with the 4th lens gluing；
6th lens have positive light coke.
2. optical lens according to claim 1, which is characterized in that the 6th lens dipped beam axis object side is convex surface,
Dipped beam axis image side surface is concave surface, and the 6th lens distance light axis object side is convex surface, and distance light axis image side surface is concave surface.
3. optical lens according to claim 1, which is characterized in that the first lens of the optical lens to the 6th lens
In have a plastic lens, the number of plastic lens is less than or equal to 2.
4. optical lens according to claim 1, which is characterized in that first lens and the 6th lens are aspheric
Face lens.
5. the optical lens according to any one of Claims 1 to 4, which is characterized in that second lens with it is described
For both 6th lens one is plastic lens or both is plastic lens, the plastic lens is aspherical.
6. optical lens according to claim 1, which is characterized in that the 4th lens are the biconvexs for having positive light coke
Lens, the 5th lens are the biconcave lens for having negative power.
7. optical lens according to claim 1, which is characterized in that the 4th lens are the concave-concaves for having negative power
Lens, the 5th lens are the biconvex lens for having positive light coke.
8. the optical lens according to any one of claim 1 to 7, which is characterized in that the optical lens is further
Including diaphragm, the diaphragm is between the third lens and the 4th lens.
9. the optical lens according to any one of claim 1 to 7, which is characterized in that first lens are described in
6th lens meet the following conditions expression formula (1)：
-7.5≤F2/F≤-3.5 (1)
Wherein, F2 is the focal length of second lens, and F is the whole group focal length value of the optical lens.
10. the optical lens according to any one of claim 1 to 7, which is characterized in that first lens are described in
6th lens meet the following conditions expression formula (2)：
2.5≤F6/F≤6.5 (2)
Wherein, F6 is the focal length of the 6th lens, and F is the whole group focal length value of the optical lens.
11. the optical lens according to any one of claim 1 to 7, which is characterized in that first lens are described in
6th lens meet the following conditions expression formula (3)：
FOV≥85 (3)
Wherein FOV is the field angle of the optical lens.
12. the optical lens according to any one of claim 1 to 7, which is characterized in that first lens are described in
6th lens meet the following conditions expression formula (4)：
4.5≤TTL/F≤7 (4)
Wherein, TTL is the optical length of the optical lens.
13. a kind of imaging device, which is characterized in that including the optical lens and use described in any one of claim 1~12
The image-forming component of electric signal is converted in the optical imagery for forming the optical lens.
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| CN115185064A (en) * | 2022-07-14 | 2022-10-14 | 福建福光天瞳光学有限公司 | Vehicle-mounted all-round lens and imaging method thereof |
| CN115185064B (en) * | 2022-07-14 | 2024-01-12 | 福建福光天瞳光学有限公司 | Vehicle-mounted all-round lens and imaging method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108535834B (en) | 2021-01-12 |
| CN113156611B (en) | 2023-10-27 |
| CN113156611A (en) | 2021-07-23 |
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