CN108663772A - optical lens and imaging device - Google Patents
optical lens and imaging device Download PDFInfo
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- CN108663772A CN108663772A CN201710207355.1A CN201710207355A CN108663772A CN 108663772 A CN108663772 A CN 108663772A CN 201710207355 A CN201710207355 A CN 201710207355A CN 108663772 A CN108663772 A CN 108663772A
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- lens
- optical
- optical lens
- object side
- image side
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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
- G02B13/001—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
-
- 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 present invention provides optical lens and imaging device.The optical lens includes successively from the object side to image side：First lens are the meniscus shaped lenses with negative power, and the object side of first lens is convex surface, and image side surface is concave surface；Second lens have negative power, and the image side surface of second lens is concave surface；The third lens are the biconvex lens with positive light coke, and the object side of the third lens is convex surface, and image side surface is convex surface, and the radius of the object side and the absolute value of the ratio of the radius of the image side surface are more than or equal to 18；4th lens；5th lens, with the 4th lens gluing；With the 6th lens, with positive light coke.By optical lens according to the present invention and imaging device, high resolution can be obtained while keeping optical lens miniaturization.
Description
Technical field
The present invention relates to the fields of optical lens and imaging device, in particular to while keeping camera lens miniaturization
Obtain the optical lens and imaging device of high resolution.
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, from original mega pixel, towards ten million picture
The direction of element is constantly promoted, and high pixel camera lens is more and more universal.
In addition, universal with mobile device, the imaging device using more and more small sizes is needed, such as applied to
The imaging device of mobile phone, the requirement for small size are very high.
In general, the raising of resolving power can be realized by increasing the lens numbers in optical lens, but correspondingly,
The volume and weight of optical lens can all increase, and be unfavorable for the miniaturization of optical lens, while cause cost increase.
Currently, 6 pieces of lens of the wide-angle optical lens generally use of mega pixel or more, although resolving power, which is compared, has 5
The optical lens of piece lens is obviously improved, but the increase of number of lenses is so that the demand of miniaturization is more prominent.
In normal conditions, in order to meet the needs of optical lens miniaturization, generally use compresses lens optical overall length
Scheme, but resolving power can be significantly affected.It is also possible to improve into image quality using non-spherical lens by increasing
Amount, still, the cost of glass aspheric lenses is higher, and plastic aspheric lens are using excessively leading to the stability of camera lens
It can decline.
In particular, for the such camera lens to work in an outdoor environment of monitoring camera or on-vehicle lens, on the one hand
Working environment is changeable, and no matter hot high temperature day, cold sleet sky are required for keeping perfectly solving image sharpness, and another party
Face, installation space are limited.Therefore, how to be obtained while ensureing optical lens miniaturization as high as possible image quality at
For problem in the urgent need to address.
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
In the optical lens and imaging device for keeping obtaining high resolution while camera lens miniaturization.
It is an object of the present invention to provide a kind of optical lens and imaging devices, saturating by the third in optical lens
The shape and focal power of mirror are arranged, and help to obtain high resolution while keeping optical lens miniaturization.
It is an object of the present invention to provide a kind of optical lens and imaging devices, pass through the 4th glued each other lens
With positive in the 5th lens preceding, negative film can be collected light by positive, reduce optical lens rear end bore/size rear.
It is an object of the present invention to provide a kind of optical lens and imaging devices, are that glass is saturating by the third lens
Mirror is conducive to thermal compensation, is further aspherical glass lens by the third lens, can further promote resolving power.
It is an object of the present invention to provide a kind of optical lens and imaging devices, pass through each lens of optimal design-aside
Shape and each power of lens of reasonable distribution can be significantly reduced the optical length of optical lens, and ensure optics
Camera lens promotes resolving power while miniaturization.
It is an object of the present invention to provide a kind of optical lens and imaging device, by diaphragm be located at the third lens and
Between 4th lens, is conducive to effectively collect into the light of optical system, reduces the eyeglass bore of optical system.
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,
It is the meniscus shaped lens with negative power, the object side of first lens is convex surface, and image side surface is concave surface；Second lens,
With negative power, the image side surface of second lens is concave surface；The third lens are the biconvex lens with positive light coke, institute
The object side for stating the third lens is convex surface, and image side surface is convex surface, and the radius of the object side and the radius of the image side surface
The absolute value of ratio is more than or equal to 18；4th lens；5th lens, with the 4th lens gluing；With the 6th lens have
Positive light coke.
In above-mentioned optical lens, the 4th lens are the biconvex lens for having positive light coke, and object side is convex surface,
Image side surface is convex surface；It is the meniscus shaped lens for having negative power with, the 5th lens, object side is concave surface, image side surface
For convex surface.
In above-mentioned optical lens, second lens are meniscus shaped lenses, and object side is convex surface.
In above-mentioned optical lens, second lens are biconcave lens, and object side is concave surface.
In above-mentioned light has camera lens, the object side of the 6th lens is convex surface, and image side surface is convex surface.
In above-mentioned optical lens, first lens to four or more than four lens in the 6th lens
For non-spherical lens.
In above-mentioned optical lens, second lens, the 4th lens, the 5th lens and the 6th lens
For non-spherical lens.
In above-mentioned optical lens, second lens, the third lens, the 4th lens, the 5th lens
It is non-spherical lens with the 6th lens.
In above-mentioned optical lens, the third lens are glass lens.
In above-mentioned optical lens, the third lens are glass aspheric lenses.
In above-mentioned optical lens, the optical lens further comprises that diaphragm, the diaphragm are located at the third lens
Between the 4th lens.
In above-mentioned optical lens, first lens meet the following conditions expression formula (1) to the 6th lens：
F3/F≤5.5 (1)
Wherein, F3 is the focal length of the third 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：
TTL/F≤14.5 (2)
Wherein, F is the whole group focal length value of the optical lens, and TTL is the optical length of the optical lens.
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.
The shape and focal power that optical lens and imaging device provided by the invention pass through the third lens in optical lens
Setting helps to obtain high resolution while keeping optical lens miniaturization.
Further, optical lens and imaging device provided by the invention pass through the shape of each lens of optimal design-aside and reasonable
Each power of lens is distributed, the optical length of optical lens can be significantly reduced, and ensureing optical lens miniaturization
While promote resolving power.
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；
Fig. 3 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 meniscus shaped lens of degree, object side is convex surface, image side surface is concave surface；Second lens, for the lens with negative power, picture
Side is concave surface；The third lens, for the biconvex lens with positive light coke, object side is convex surface, image side surface is convex surface, and object
The absolute value of the ratio of the radius of side and the radius of image side surface is more than or equal to 18；4th lens；5th lens, with the 4th
Lens are glued；6th lens, for the biconvex lens with positive light coke, object side is convex surface, image side surface is convex surface.
In optical lens according to the ... of the embodiment of the present invention, pass through the shape and focal power of the third lens in optical lens
Setting helps to obtain high resolution while keeping optical lens miniaturization, this will be described in more detail below.
In above-mentioned optical lens, it is preferred that the 4th lens are the biconvex lens with positive light coke, and object side is convex
Face, image side surface are convex surface.In addition, the 5th lens are the meniscus shaped lens with negative power, object side is concave surface, image side surface
For convex surface.In this way, by from the point of view of the incident direction of light, preceding, negative film can collect light by positive, subtract rear positive
Small optical lens rear end bore/size.
In above-mentioned optical lens, the second lens are meniscus shaped lens with negative power or with negative power
Biconcave lens.That is, the image side surface of the second lens is concave surface, and object side can be convex surface or concave surface.
In above-mentioned optical lens, it is preferred that the first lens to four or more than four lens in the 6th lens
For non-spherical lens.
In above-mentioned optical lens, it is preferred that the third lens are glass lens, and more preferably, and the third lens are non-
Spherical glass lens.When the third lens are glass lens, be conducive to thermal compensation.In addition, when the third lens are aspherical glass
When lens, resolving power can be further promoted.Here, it will be understood by those skilled in the art that according to the ... of the embodiment of the present invention
In optical lens, the third lens are not limited in glass lens or aspherical glass lens.For example, the third lens can also be
Plastic aspheric lens, high resolution and low cost may be implemented in this, but has poor temperature performance.Therefore, in reality
In, the mirror shape and material of the third lens can be determined according to specific requirements.
Preferably, in above-mentioned optical lens, the first lens meet the following conditions expression formula (1) and (2) to the 6th lens：
F3/F≤5.5 (1)
TTL/F≤14.5 (2)
Wherein, F3 is the focal length of the third lens, and F is the whole group focal length value of optical lens, and TTL is the optics of optical lens
Length, the i.e. distance of the object side outermost point of the first lens to imaging focal plane.
In addition, in above-mentioned optical lens, the third lens meet the following conditions expression formula (3)：
Shu >=18 Shu R5/R6 (3)
Wherein, R5 is the radius of the object side of the third lens, and R6 is the radius of the image side surface of the third lens.Shu R5/R6 Shu tables
Show the absolute value of the ratio of the radius of the object side of the third lens and the radius of image side surface.
Therefore, in optical lens according to the ... of the embodiment of the present invention, due to the biconvex shape of the third lens, object side radius
It is arranged with the ratio and positive light coke of image side radius surface, short TTL is contributed to form, to obtain the optical lens of miniaturization.
So in optical lens according to the ... of the embodiment of the present invention, it is not intended to limit the mirror shape and material of the third lens.
Here, it will be understood by those skilled in the art that other than the shape of the third lens and focal power are arranged, in basis
In the optical lens of the embodiment of the present invention, pass through the shape of each lens of optimal design-aside and the light focus of each lens of reasonable distribution
Degree can be significantly reduced TTL, and promote resolving power while ensureing optical lens miniaturization.
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.
In the following, by the structure and function of the first lens in optical lens according to the ... of the embodiment of the present invention to the 6th lens
It is described in further 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 are convex to object lateral bend, can make incident ray incidence angle on the face of meeting head-on
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, it is contemplated that the outdoor mounted use environment of on-vehicle lens, for example, the case where encountering in bad weathers such as sleet.Convex surface
Be conducive to adapt to the outdoor application of vehicle-mounted front view lens, for example, when in the environment in such as rainy day, which can help
In the landing of droplet, to reduce the influence to imaging.
In addition, the first lens can be spherical glass lens or aspherical glass lens.When the first lens are spherical surface glass
When glass lens, the cost of optical lens can be reduced.And when the first lens are aspherical glass lens, before camera lens being reduced
Port diameter, reduces the overall volume of camera lens, and further increases resolving power.
In optical lens according to the ... of the embodiment of the present invention, the second lens be the meniscus shaped lens that image side surface is concave surface or
Biconcave lens, object side can be convex surface, or concave surface.Because the first lens of optical lens are divergent lens, institute
The light that the first lens are collected to be compressed using the configuration of the second lens so that light tendency is relatively gentle, to make
Light smooth transition is obtained to rear.
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 convex surface.The third lens are convergent lens so that the light of diverging smoothly enters rear,.In addition, the third lens can be with
The spherical aberration and chromatism of position that balanced compensated first lens and the second lens introduce.Also, as described above, the shape of the third lens and
Focal power setting is more reasonable, is conducive to the high resolution that optical lens entirety is kept while shortening optical system overall length.
In optical lens according to the ... of the embodiment of the present invention, diaphragm is located at the third lens and the 4th glued each other lens
And the 5th between lens, for collecting front and back light, shorten optical system overall length, and reduce the bore of front and back lens group.
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, reduce tolerance sensitivities, can also residual fraction aberration with the aberration of balance system.In addition, from light incident direction
From the point of view of, the positive with positive light coke is preceding, and the negative film with negative power is rear, after can further converging front light
It is transitioned into rear again, reduces optical lens rear end bore/size, to further decrease system overall length.
In optical lens according to the ... of the embodiment of the present invention, the 6th lens are biconvex lens, and object side is convex surface, image side
Face is convex surface.In this way, the 6th lens are convergent lens so that convergence of rays.Furthermore it is preferred that the 6th lens are aspherical
Lens can meet the smaller systems of FNO, such as FNO≤2, while reduce the light path that marginal ray reaches imaging surface.Also, profit
With aspherical, the 6th lens can play off-axis point aberration good corrective action, the optical properties such as optimization distortion, CRA.
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, miniaturization, low cost and high resolution 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 (3)
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 concaves towards the second surface S2 of image side；Have
Second lens L2 of the falcate of negative power has and is convex to the first surface S3 of object side and concaves towards the second surface S4 of image side；
The third lens L3 of biconvex shape with positive light coke has the first surface S5 for being convex to object side and the second table for being convex to image side
Face S6；Diaphragm STO；Glued the 4th lens L4 and the 5th lens L5 each other, wherein the 4th lens L4 is with positive light coke
Biconvex shape, the second surface S9, the 5th lens L5 for having the first surface S8 for being convex to object side and being convex to image side are with negative light
The meniscus shape of focal power has and concaves towards the first surface S9 of object side and be convex to the second surface S10 of image side；With positive light coke
6th lens L6 of biconvex shape has the first surface S11 for being convex to object side and the second surface S12 for being convex to image side；Plane is saturating
Mirror L7 has the first surface S13 towards the object side and second surface S14 towards image side, generally colour filter；Planar lens
L8, has a first surface S15 towards the object side and second surface S16 towards image side, generally protective glass, for protect at
Image planes；L9 has imaging surface S17, generally chip.
The lens data of said lens is shown in following table 1：
【Table 1】
| Surface | Radius | Thickness | Nd | Vd |
| 1 | 10.7223 | 0.6791 | 1.77 | 49.61 |
| 2 | 2.9302 | 1.8176 | ||
| 3 | 7.8394 | 0.6433 | 1.51 | 56.29 |
| 4 | 0.9525 | 1.0906 | ||
| 5 | 67.1026 | 1.5049 | 1.87 | 21.00 |
| 6 | -3.6055 | 0.4476 | ||
| STO | Infinitely | 0.1613 | ||
| 8 | 2.4079 | 1.6441 | 1.53 | 56.07 |
| 9 | -0.4760 | 0.4289 | 1.64 | 23.53 |
| 10 | -23.3520 | 0.2262 | ||
| 11 | 2.3746 | 0.9293 | 1.53 | 56.07 |
| 12 | -3.5678 | 0.0707 | ||
| 13 | Infinitely | 0.5500 | 1.52 | 64.21 |
| 14 | Infinitely | 0.3182 | ||
| 15 | Infinitely | 0.4000 | 1.52 | 64.21 |
| 16 | Infinitely | 0.9748 | ||
| Image planes | Infinitely |
The surface S3 and S4 of second lens, surface S8, S9 and S10 and the 6th lens of the 4th lens and the 5th lens
Surface S11 and S12 circular cone coefficient k and high order aspheric surface coefficient A, B, C, D and E it is as shown in the following Table 2.
【Table 2】
| Surface | k | A | B | C | D | E |
| 3 | -108.0012 | 5.5657E-04 | -2.4980E-03 | 4.0301E-04 | -2.6131E-05 | 2.1896E-07 |
| 4 | -1.2815 | 3.0237E-02 | 9.5489E-03 | 4.1107E-04 | -1.1806E-03 | 2.5666E-03 |
| 8 | -1.6342 | 3.0154E-02 | -2.3321E-02 | 1.1346E-01 | -1.5091E-01 | 7.2846E-02 |
| 9 | -1.7489 | -1.9480E-01 | 6.5092E-02 | -5.9786E-01 | 5.9121E-01 | -1.7400E-01 |
| 10 | 210.0008 | -7.8836E-03 | -1.7191E-04 | 7.0441E-04 | -1.1806E-03 | 3.4906E-03 |
| 11 | -10.5744 | -7.0932E-03 | 7.6009E-03 | -9.0824E-04 | 1.2435E-03 | -1.5386E-05 |
| 12 | 0.3704 | 1.1610E-02 | 2.6983E-03 | 1.0071E-02 | -3.0290E-04 | 8.4235E-04 |
In optical lens according to a first embodiment of the present invention, the focal length F3 of the third lens, the whole group of optical lens are burnt
Optical length TTL away from value F and optical lens and its between relationship and the third lens the radius R5 of surface S5, surface
The radius R6 of S6 and its between relationship it is as shown in the following Table 3.
【Table 3】
| F3 | 3.933042 |
| F | 1.1 |
| TTL | 11.8864 |
| R5 | 67.102601 |
| R6 | -3.60546 |
| F3/F | 3.57549 |
| TTL/F | 10.805818 |
| Shu R5/R6 Shu | 18.611384 |
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 (3), to obtain high resolving power while keeping the miniaturization of optical lens.
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 concaves towards the second surface S2 of image side；Have
Second lens L2 of the bi-concave shape of negative power has and concaves towards the first surface S3 of object side and concave towards the second surface of image side
S4；The third lens L3 of biconvex shape with positive light coke, that there is the first surface S5 for being convex to object side and be convex to image side
Two surface S6；Diaphragm STO；Glued the 4th lens L4 and the 5th lens L5 each other, wherein the 4th lens L4 is with positive light focus
The biconvex shape of degree, has a first surface S8 for being convex to object side and the second surface S9 for being convex to image side, the 5th lens L5 be with
The meniscus shape of negative power has and concaves towards the first surface S9 of object side and be convex to the second surface S10 of image side；With positive light focus
6th lens L6 of the biconvex shape of degree has the first surface S11 for being convex to object side and the second surface S12 for being convex to image side；It is flat
Face lens L7 has the first surface S13 towards the object side and second surface S14 towards image side, generally colour filter；Plane is saturating
Mirror L8 has the first surface S15 towards the object side and second surface S16 towards image side, generally protective 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 | Thickness | Nd | Vd |
| 1 | 8.8170 | 0.8928 | 1.77 | 49.61 |
| 2 | 2.4919 | 2.1739 | ||
| 3 | -22.7278 | 0.7988 | 1.51 | 56.29 |
| 4 | 1.4954 | 0.9433 | ||
| 5 | 87.6390 | 2.1670 | 1.85 | 23.79 |
| 6 | -4.6134 | 0.2203 | ||
| STO | Infinitely | 0.6000 | ||
| 8 | 3.1639 | 1.9545 | 1.51 | 64.00 |
| 9 | -2.0488 | 0.5639 | 1.70 | 30.00 |
| 10 | -29.5429 | 0.1931 | ||
| 11 | 3.1041 | 1.2217 | 1.53 | 56.07 |
| 12 | -4.4053 | 0.0930 | ||
| 13 | Infinitely | 0.5500 | 1.52 | 64.21 |
| 14 | Infinitely | 0.4183 | ||
| 15 | Infinitely | 0.4000 | 1.52 | 64.21 |
| 16 | Infinitely | 1.4545 | ||
| Image planes | Infinitely |
The surface S3 and S4 of second lens, surface S8, S9 and S10 and the 6th lens of the 4th lens and the 5th lens
Surface S11 and S12 circular cone coefficient k and high order aspheric surface coefficient A, B, C, D and E it is as shown in the following Table 5.
【Table 5】
| Surface | k | A | B | C | D | E |
| 3 | -1378.2800 | -5.4682E-04 | -6.5770E-04 | 5.9247E-05 | -1.8477E-06 | 1.6793E-06 |
| 4 | -0.8071 | 2.4565E-02 | 2.9730E-04 | -6.1831E-04 | -1.3787E-03 | 4.5744E-04 |
| 8 | -1.0325 | 1.1537E-02 | -4.5230E-03 | 1.8810E-03 | -1.1812E-02 | 2.5662E-03 |
| 9 | -2.7456 | -8.6273E-02 | 1.3290E-02 | -9.2073E-02 | 4.7318E-02 | -1.0734E-02 |
| 10 | 186.4813 | -4.0445E-03 | -5.6146E-05 | 1.6553E-04 | -1.0591E-04 | 1.3281E-04 |
| 11 | -11.2991 | -2.3729E-03 | 2.0330E-03 | -1.5992E-04 | 1.1465E-04 | -3.7243E-06 |
| 12 | 0.3885 | 5.2120E-03 | 3.1236E-04 | 1.4552E-03 | -2.4718E-04 | 4.5558E-05 |
In optical lens according to a second embodiment of the present invention, the focal length F3 of the third lens, the whole group of optical lens are burnt
Optical length TTL away from value F and optical lens and its between relationship and the third lens the radius R5 of surface S5, surface
The radius R6 of S6 and its between relationship it is as shown in the following Table 6.
【Table 6】
| F3 | 5.187112 |
| F | 1.09765 |
| TTL | 14.645 |
| R5 | 87.63901 |
| R6 | -4.613391 |
| F3/F | 4.725652075 |
| TTL/F | 13.34214003 |
| Shu R5/R6 Shu | 18.99665777 |
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 (3), to obtain high resolving power while keeping the miniaturization of optical lens.
Here, although it will be understood by those skilled in the art that in first embodiment above and second embodiment, third is saturating
Mirror is spherical lens, but as described above, the third lens may be non-spherical lens.
In conclusion in optical lens according to the ... of the embodiment of the present invention, pass through the shape of the third lens in optical lens
Shape and focal power setting help to obtain high resolution while keeping optical lens miniaturization.
In optical lens according to the ... of the embodiment of the present invention, pass through positive in glued each other the 4th lens and the 5th lens
Preceding, negative film can be collected light by positive, reduce optical lens rear end bore/size rear.
In optical lens according to the ... of the embodiment of the present invention, it is glass lens by the third lens, is conducive to thermal compensation, into
One step is aspherical glass lens by the third lens, can further promote resolving power.
It is each by the shape and reasonable distribution of each lens of optimal design-aside in optical lens according to the ... of the embodiment of the present invention
A power of lens can be significantly reduced TTL, and promote resolving power while ensureing optical lens miniaturization.
In optical lens according to the ... of the embodiment of the present invention, by diaphragm between the third lens and the 4th lens, have
It is effectively collected conducive to the light for entering optical system, reduces the eyeglass bore of optical system.
In optical lens according to the ... of the embodiment of the present invention, by the way that glued each other the 4th lens and the 5th lens are arranged
Close to the position of diaphragm, the balance of system aberration and the reasonability of structure are helped to realize.
In addition, in optical lens according to the ... of the embodiment of the present invention, it is convex surface by the object side of the first lens, can makes
It is small to obtain incident ray incidence angle on the face of meeting head-on, is conducive to collect more light.Also, the object side for passing through the first lens is
Convex surface is conducive to the outdoor application of adaptive optics camera lens.
In addition, in optical lens according to the ... of the embodiment of the present invention, it is spherical glass lens by the first lens, can drops
The cost of low optical camera lens.Also, it is aspherical glass lens by the first lens, camera lens front end bore can be reduced, reduce
The overall volume of camera lens, and further increase resolving power.
In addition, in optical lens according to the ... of the embodiment of the present invention, there is negative power by the second lens, can utilize
The light that the first lens are collected is compressed in the configuration of second lens so that light tendency is relatively gentle, so that light
Smooth transition is to rear.
It is the convergence with positive light coke by the third lens in addition, in optical lens according to the ... of the embodiment of the present invention
Lens so that the light of diverging smoothly enters rear.Also, the third lens can be with balanced compensated first lens and the second lens
The spherical aberration and chromatism of position of introducing.
In addition, in optical lens according to the ... of the embodiment of the present invention, it is glued each other by the 4th lens and the 5th lens, the
Four lens and the 5th lens itself can correct aberration, reduce tolerance sensitivities, can also residual fraction aberration with balance system
Aberration.
It is the convergence with positive light coke by the 6th lens in addition, in optical lens according to the ... of the embodiment of the present invention
Lens so that convergence of rays.Also, it is non-spherical lens by the 6th lens, the smaller systems of FNO can be met, reduced simultaneously
Marginal ray reaches the light path of imaging surface, and it is possible to play good corrective action, optimization distortion, CRA to off-axis point aberration
Etc. optical properties.
[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 are the meniscus shaped lenses with negative power, and the object side of first lens is convex surface, and image side surface is concave surface；Second
Lens have negative power, and the image side surface of second lens is concave surface；The third lens are the biconvex lens with positive light coke,
The object side of the third lens is convex surface, and image side surface is convex surface, and the ratio of the radius of the radius and image side surface of object side is exhausted
18 are more than or equal to value；4th lens；5th lens, with the 4th lens gluing；With the 6th lens, with positive light coke.
Fig. 3 is the schematic block diagram of imaging device according to the ... of the embodiment of the present invention.As shown in figure 3, 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 4th lens are the biconvex lens for having positive light coke, and object side is convex surface, as
Side is convex surface；It is the meniscus shaped lens for having negative power with, the 5th lens, object side is concave surface, and image side surface is convex
Face.
In above-mentioned optical lens, which is meniscus shaped lens, and object side is convex surface.
In above-mentioned optical lens, which is biconcave lens, and object side is concave surface.
In above-mentioned optical lens, the object side of the 6th lens is convex surface, and image side surface is convex surface.
In above-mentioned optical lens, first lens to four in the 6th lens or more than four lens are non-
Spherical lens.
In above-mentioned optical lens, second lens, the 4th lens, the 5th lens and the 6th lens are aspherical
Lens.
In above-mentioned optical lens, second lens, the third lens, the 4th lens, the 5th lens and the 6th
Lens are non-spherical lens.
In above-mentioned optical lens, which is glass lens.
In above-mentioned optical lens, which is glass aspheric lenses.
In above-mentioned optical lens, which further comprises diaphragm, the diaphragm be located at the third lens and this
Between four lens.
In above-mentioned optical lens, which meets the following conditions expression formula (1) to the 6th lens：
F3/F≤5.5 (1)
Wherein, F3 is the focal length of the third lens, and F is the whole group focal length value of the optical lens.
In above-mentioned optical lens, which meets the following conditions expression formula (2) to the 6th lens：
TTL/F≤14.5 (2)
Wherein, F is the whole group focal length value of the optical lens, and TTL is the optical length of the optical lens.
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 second embodiment.
Optical lens and imaging device according to the ... of the embodiment of the present invention by the shapes of the third lens in optical lens and
Focal power is arranged, and helps to obtain high resolution while keeping optical lens miniaturization.
Further, the shape that optical lens and imaging device according to the ... of the embodiment of the present invention pass through each lens of optimal design-aside
Shape and each power of lens of reasonable distribution can be significantly reduced TTL, and be carried while ensureing optical lens miniaturization
Rise resolving power.
Optical lens and imaging device according to the ... of the embodiment of the present invention pass through glued each other the 4th lens and the 5th lens
Preceding, negative film can be collected light by positive, reduce optical lens rear end bore/size rear middle positive.
Optical lens and imaging device according to the ... of the embodiment of the present invention are glass lens by the third lens, are conducive to vulcanize
It repays, is further aspherical glass lens by the third lens, can further promote resolving power.
Optical lens and imaging device according to the ... of the embodiment of the present invention by diaphragm be located at the third lens and the 4th lens it
Between, be conducive to effectively collect into the light of optical system, reduce the eyeglass bore of optical system.
Further, optical lens and imaging device according to the ... of the embodiment of the present invention are by by the 4th glued each other lens
It is positioned close to the position of diaphragm with the 5th lens, helps to realize the balance of system aberration and the reasonability of structure.
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 are the meniscus shaped lenses with negative power, and the object side of first lens is convex surface, and image side surface is recessed
Face；
Second lens have negative power, and the image side surface of second lens is concave surface；
The third lens are the biconvex lens with positive light coke, and the object side of the third lens is convex surface, and image side surface is convex
Face, and the radius of the object side and the absolute value of the ratio of the radius of the image side surface are more than or equal to 18；
4th lens；
5th lens, with the 4th lens gluing；With
6th lens have positive light coke.
2. optical lens according to claim 1, which is characterized in that
4th lens are the biconvex lens for having positive light coke, and object side is convex surface, and image side surface is convex surface；With
5th lens are the meniscus shaped lenses for having negative power, and object side is concave surface, and image side surface is convex surface.
3. optical lens according to claim 1, which is characterized in that
Second lens are meniscus shaped lenses, and object side is convex surface.
4. optical lens according to claim 1, which is characterized in that
Second lens are biconcave lens, and object side is concave surface.
5. the optical lens according to any one of claim 1 to 4, which is characterized in that first lens are described in
Four in 6th lens or more than four lens are non-spherical lens.
6. optical lens according to claim 5, which is characterized in that second lens, the 4th lens, described
Five lens and the 6th lens are non-spherical lens.
7. optical lens according to claim 5, which is characterized in that second lens, the third lens, described
Four lens, the 5th lens and the 6th lens are non-spherical lens.
8. the optical lens according to any one of claim 1 to 4, which is characterized in that the third lens are glass
Lens.
9. optical lens according to claim 8, which is characterized in that the third lens are glass aspheric lenses.
10. the optical lens according to any one of claim 1 to 9, which is characterized in that the optical lens is further
Including diaphragm, the diaphragm is between the third lens and the 4th lens.
11. the optical lens according to any one of claim 1 to 9, which is characterized in that first lens are described in
6th lens meet the following conditions expression formula (1)：
F3/F≤5.5 (1)
Wherein, F3 is the focal length of the third lens, and F is the whole group focal length value of the optical lens.
12. the optical lens according to any one of claim 1 to 9, which is characterized in that first lens are described in
6th lens meet the following conditions expression formula (2)：
TTL/F≤14.5 (2)
Wherein, F is the whole group focal length value of the optical lens, and 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 to 12
The image-forming component of electric signal is converted in the optical imagery for forming the optical lens.
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| CN108663772B (en) | 2022-07-05 |
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