CN107144943A - Pick-up lens - Google Patents
Pick-up lens Download PDFInfo
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- CN107144943A CN107144943A CN201710585219.6A CN201710585219A CN107144943A CN 107144943 A CN107144943 A CN 107144943A CN 201710585219 A CN201710585219 A CN 201710585219A CN 107144943 A CN107144943 A CN 107144943A
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- Prior art keywords
- lens
- pick
- image side
- optical axis
- thing 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
- G02B13/004—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 four 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
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
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- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
This application discloses a kind of pick-up lens, the pick-up lens is sequentially included along optical axis by thing side to image side：The first lens, the second lens, the 3rd lens and the 4th lens with focal power.Wherein, at least one in the first lens and the second lens has positive light coke；The thing of 3rd lens is sideways concave surface with the image side surface of the 4th lens；And total effective focal length f of the half ImgH of effective pixel area diagonal line length and pick-up lens meets ImgH/f ＞ 1 on the imaging surface of pick-up lens.
Description
Technical field
The present invention relates to a kind of pick-up lens, more particularly it relates to which a kind of include the wide-angle imaging of four lens
Camera lens.
Background technology
With the development of the chip technologies such as CCD or CMOS, pick-up lens is also gradually toward miniaturization, lightweight and high pixel neck
Domain is developed.In some application fields, also the big field range of camera lens is proposed and required accordingly, it is necessary to which camera lens is meeting small
There is wide angle characteristic while type and high image quality.In addition, in order to realize stable mass production, in addition it is also necessary to which camera lens has
Good sensitivity.
In order to realize wide angle characteristic, it will usually expand the angle of visual field of camera lens by the way of increase lens number, but
This mode is unfavorable for realizing the miniaturization and lightweight of camera lens；Meanwhile, lens number excessively can also have to reducing all kinds of aberrations
Limited, be unfavorable for improving the image quality of camera lens.
Accordingly, it would be desirable to not excessively on the premise of increase stationary lens piece number there is provided a kind of compact conformation, it is high as matter, it is low
The wide-angle camera of susceptibility.
The content of the invention
This application provides be applicable to portable type electronic product, can at least solve or part solve it is of the prior art
The pick-up lens of at least one above-mentioned shortcoming, such as wide-angle lens.
The one side of the application provide such a pick-up lens, the pick-up lens along optical axis by thing side to image side according to
Sequence includes：The first lens, the second lens, the 3rd lens and the 4th lens with focal power.Wherein, the first lens and second
At least one in lens can have positive light coke；The thing of 3rd lens can be sideways concave surface with the image side surface of the 4th lens；
And total effective focal length f of the half ImgH of effective pixel area diagonal line length and pick-up lens can on the imaging surface of pick-up lens
Meet ImgH/f ＞ 1.
In one embodiment, the first lens and the second lens can have positive light coke；Effective Jiao of first lens
Effective focal length f2 away from f1 and the second lens can meet 3 ＜ f1/f2≤7.
In one embodiment, the radius of curvature of the lens image side surface of radius of curvature R 5 and the 3rd of the 3rd lens thing side
R6 can meet 0.7 ＜ R5/R6 ＜ 1.2.
In one embodiment, pick-up lens may also include the diaphragm being arranged between the first lens and the second lens.
In one embodiment, the thing side of the first lens can be convex surface, and the image side surface of the second lens can be convex surface.
In one embodiment, the second lens are in the center thickness CT2 and the thing side of the first lens on optical axis
The heart can meet 0.1 ＜ CT2/TTL ＜ 0.22 on optical axis to pick-up lens imaging surface apart from TTL.
In one embodiment, the spacing distance T12 and the first lens of the first lens and the second lens on optical axis
The center of thing side can meet 0.8 ＜ (T12*10)/TTL ＜ 1.5 on optical axis to pick-up lens imaging surface apart from TTL.
In one embodiment, the edge thickness ET4 and the 4th lens of the 4th lens are in the center thickness CT4 on optical axis
1 ＜ ET4/CT4 ＜ 1.5 can be met.
In one embodiment, effectively the half of the effective radius DT12 of the first lens image side surface and the second lens image side surface
Footpath DT22 can meet 0.7 ＜ DT12/DT22 ＜ 1.3.
In one embodiment, effectively the half of the effective radius DT11 of the first lens thing side and the 3rd lens image side surface
Footpath DT32 can meet 0.9 ＜ DT11/DT32 ＜ 1.3.
In one embodiment, the intersection point of the 4th lens image side surface and optical axis to the 4th lens image side surface effective radius
Summit in the center thickness CT4 on optical axis can meet 0.2 ＜ SAG42/CT4 ＜ on optical axis apart from SAG42 and the 4th lens
0.6。
In one embodiment, pick-up lens, which may also include, is arranged between the 4th lens and pick-up lens imaging surface
Bandpass filter, the band-pass wavelength scope of the bandpass filter can be 400nm to 800nm.
Further aspect of the application provides such a pick-up lens, and the pick-up lens is along optical axis by thing side to image side
Sequentially include：First lens, the second lens, the 3rd lens and the 4th lens.Wherein, the first lens and the second lens can have
There is positive light coke；3rd lens can have positive light coke or negative power, and its thing side can be concave surface；4th lens can have just
Focal power or negative power, its image side surface can be concave surface；And the 4th lens edge thickness ET4 and the 4th lens on optical axis
Center thickness CT4 can meet 1 ＜ ET4/CT4 ＜ 1.5.
In one embodiment, the thing side of the first lens can be convex surface, and the image side surface of the second lens can be convex surface；Take the photograph
As camera lens may also include the diaphragm being arranged between the first lens and the second lens.
In one embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens can meet 3 ＜
f1/f2≤7。
In one embodiment, the radius of curvature of the lens image side surface of radius of curvature R 5 and the 3rd of the 3rd lens thing side
R6 can meet 0.7 ＜ R5/R6 ＜ 1.2.
In one embodiment, the second lens are in the center thickness CT2 and the thing side of the first lens on optical axis
The heart can meet 0.1 ＜ CT2/TTL ＜ 0.22 on optical axis to pick-up lens imaging surface apart from TTL.
In one embodiment, pick-up lens, which may also include, is arranged between the 4th lens and pick-up lens imaging surface
Bandpass filter.
In one embodiment, the band-pass wavelength scope of bandpass filter can be 400nm to 800nm.
In one embodiment, on the imaging surface of pick-up lens the half ImgH of effective pixel area diagonal line length with taking the photograph
As total effective focal length f of camera lens can meet ImgH/f ＞ 1.
In one embodiment, the spacing distance T12 and the first lens of the first lens and the second lens on optical axis
The center of thing side can meet 0.8 ＜ (T12*10)/TTL ＜ 1.5 on optical axis to pick-up lens imaging surface apart from TTL.
In one embodiment, effectively the half of the effective radius DT12 of the first lens image side surface and the second lens image side surface
Footpath DT22 can meet 0.7 ＜ DT12/DT22 ＜ 1.3.
In one embodiment, effectively the half of the effective radius DT11 of the first lens thing side and the 3rd lens image side surface
Footpath DT32 can meet 0.9 ＜ DT11/DT32 ＜ 1.3.
In one embodiment, the intersection point of the 4th lens image side surface and optical axis to the 4th lens image side surface effective radius
Summit in the center thickness CT4 on optical axis can meet 0.2 ＜ SAG42/CT4 ＜ on optical axis apart from SAG42 and the 4th lens
0.6。
Further aspect of the application additionally provides such a pick-up lens, and the pick-up lens is along optical axis by thing side to picture
Side sequentially includes：First lens, the second lens, the 3rd lens and the 4th lens.Wherein, the first lens and the second lens
With positive light coke；3rd lens can have positive light coke or negative power, and its thing side can be concave surface；4th lens can have
Positive light coke or negative power, its image side surface can be concave surface；And first lens image side surface effective radius DT12 and second it is saturating
The effective radius DT22 of mirror image side can meet 0.7 ＜ DT12/DT22 ＜ 1.3.
Further aspect of the application additionally provides such a pick-up lens, and the pick-up lens is along optical axis by thing side to picture
Side sequentially includes：First lens, the second lens, the 3rd lens and the 4th lens.Wherein, the first lens and the second lens
With positive light coke；3rd lens can have positive light coke or negative power, and its thing side can be concave surface；4th lens can have
Positive light coke or negative power, its image side surface can be concave surface；And first lens thing side effective radius DT11 and the 3rd it is saturating
The effective radius DT32 of mirror image side can meet 0.9 ＜ DT11/DT32 ＜ 1.3.
Further aspect of the application additionally provides such a pick-up lens, and the pick-up lens is along optical axis by thing side to picture
Side sequentially includes：First lens, the second lens, the 3rd lens and the 4th lens.Wherein, the first lens and the second lens
With positive light coke；3rd lens can have positive light coke or negative power, and its thing side can be concave surface；4th lens can have
Positive light coke or negative power, its image side surface can be concave surface；And the 4th lens image side surface and optical axis intersection point to the 4th lens
The effective radius summit of image side surface can be met in the center thickness CT4 on optical axis with the 4th lens apart from SAG42 on optical axis
0.2 ＜ SAG42/CT4 ＜ 0.6.
Further aspect of the application additionally provides such a pick-up lens, and the pick-up lens is along optical axis by thing side to picture
Side sequentially includes：First lens, the second lens, the 3rd lens and the 4th lens.Wherein, the first lens and the second lens
With positive light coke；3rd lens can have positive light coke or negative power, and its thing side can be concave surface；4th lens can have
Positive light coke or negative power, its image side surface can be concave surface.The pick-up lens, which may also include, is arranged at the 4th lens and camera lens
Bandpass filter between head imaging surface, the band-pass wavelength scope of the bandpass filter can be 400nm to 800nm.
The application employs multi-disc (for example, four) lens, by each power of lens of reasonable distribution, face type, each
Spacing etc. on axle between the center thickness of mirror and each lens, can make pick-up lens have at least one following advantage：
Expand the angle of visual field, realize the wide angle of camera lens；
Compact conformation, realizes the miniaturization of camera lens；
Reduce the susceptibility of camera lens；And
All kinds of aberrations are corrected, the image quality of camera lens is lifted.
Brief description of the drawings
With reference to accompanying drawing, by the detailed description of following non-limiting embodiment, other features of the application, purpose and excellent
Point will be apparent.In the accompanying drawings：
Fig. 1 shows the structural representation of the pick-up lens according to the embodiment of the present application 1；
Fig. 2A to Fig. 2 C respectively illustrates chromatic curve on the axle of the pick-up lens of embodiment 1, astigmatism curve and distortion
Curve；
Fig. 3 shows the structural representation of the pick-up lens according to the embodiment of the present application 2；
Fig. 4 A to Fig. 4 C respectively illustrate chromatic curve on the axle of the pick-up lens of embodiment 2, astigmatism curve and distortion
Curve；
Fig. 5 shows the structural representation of the pick-up lens according to the embodiment of the present application 3；
Fig. 6 A to Fig. 6 C respectively illustrate chromatic curve on the axle of the pick-up lens of embodiment 3, astigmatism curve and distortion
Curve；
Fig. 7 shows the structural representation of the pick-up lens according to the embodiment of the present application 4；
Fig. 8 A to Fig. 8 C respectively illustrate chromatic curve on the axle of the pick-up lens of embodiment 4, astigmatism curve and distortion
Curve.
Embodiment
In order to more fully understand the application, refer to the attached drawing is made into more detailed description to the various aspects of the application.Should
Understand, these describe the description of illustrative embodiments simply to the application in detail, rather than limit the application in any way
Scope.In the specification, identical reference numbers identical element.Stating "and/or" includes associated institute
Any and all combinations of one or more of list of items.
It should be noted that in this manual, the statement of first, second, third, etc. is only used for a feature and another spy
Levy and make a distinction, and do not indicate that any limitation to feature.Therefore, in the case of without departing substantially from teachings of the present application, hereinafter
The first lens discussed are also known as the second lens or the 3rd lens.
In the accompanying drawings, for convenience of description, thickness, the size and dimension of lens are somewhat exaggerated.Specifically, accompanying drawing
Shown in sphere or aspherical shape be illustrated by way of example.That is, sphere or aspherical shape is not limited to accompanying drawing
In the sphere that shows or aspherical shape.Accompanying drawing is merely illustrative and simultaneously non-critical is drawn to scale.
Herein, near axis area refers to the region near optical axis.If lens surface is convex surface and does not define convex surface position
When putting, then it represents that the lens surface is convex surface near axis area is less than；If lens surface is concave surface and does not define the concave surface position
When, then it represents that the lens surface is concave surface near axis area is less than.It is referred to as thing side near the surface of object in each lens,
It is referred to as image side surface near the surface of imaging surface in each lens.
It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory
Represent there is stated feature, element and/or part when being used in bright book, but do not preclude the presence or addition of one or more
Further feature, element, part and/or combinations thereof.In addition, ought the statement of such as " ... at least one " appear in institute
When after the list of row feature, the whole listed feature of modification, rather than the individual component in modification list.In addition, working as description originally
During the embodiment of application, represented " one or more embodiments of the application " using "available".Also, term " exemplary "
It is intended to refer to example or illustration.
Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein be respectively provided with
The application one skilled in the art's is generally understood that identical implication.It will also be appreciated that term is (such as in everyday words
Term defined in allusion quotation) implication consistent with their implications in the context of correlation technique should be interpreted as having, and
It will not explained with idealization or excessively formal sense, unless clearly such herein limit.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the application in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The feature of the application, principle and other aspects are described in detail below.
Such as four lens with focal power, i.e., first are included according to the pick-up lens of the application illustrative embodiments
Lens, the second lens, the 3rd lens and the 4th lens.This four lens are along optical axis from thing side to image side sequential.This is taken the photograph
As camera lens can also further comprise the photo-sensitive cell that is arranged at imaging surface.
In the exemplary embodiment, the first lens can have positive light coke；Second lens can have positive light coke；3rd
Lens have positive light coke or negative power, and its thing side can be concave surface；And the 4th lens there is positive light coke or negative light focus
Degree, its image side surface can be concave surface.
Pick-up lens can further comprise the diaphragm being arranged between the first lens and the second lens, further to lift mirror
The image quality of head.Alternatively, the thing side of the first lens can be convex surface, and image side surface can be concave surface；The thing side of second lens
Can be concave surface, image side surface can be convex surface.Set by such so that the first lens and the second lens are formed centered on diaphragm
The structure of near symmetrical, so as to effectively reduction camera lens susceptibility.
3 ＜ f1/f2≤7 can be met between the effective focal length f1 of first lens and the effective focal length f2 of the second lens, more
Body, f1 and f2 can further meet 5.66≤f1/f2≤7.00.By f1 and f2 Ratio control in the reasonable scope, can have
Effect avoids the excessively concentration of focal power, reduces the susceptibility of camera lens, and can lift the image quality of camera lens.
It can be met between the radius of curvature R 6 of the image side surface of the lens of radius of curvature R 5 and the 3rd of the thing side of 3rd lens
0.7 ＜ R5/R6 ＜ 1.2, more specifically, R5 and R6 can further meet 0.72≤R5/R6≤1.14, it is sensitive to reduce camera lens
Degree, lifts camera lens quality.
The optics total length TTL of center thickness CT2 and pick-up lens on second lens and optical axis be (that is, the first lens
The center of thing side to the imaging surface of pick-up lens the distance on optical axis) between can meet 0.1 ＜ CT2/TTL ＜ 0.22,
More specifically, CT2 and TTL can further meet 0.14≤CT2/TTL≤0.21.Reasonable disposition CT2 and TTL are conducive to shortening mirror
The optics total length of head, realizes miniaturization and wide angle.
Between the spacing distance T12 and pick-up lens of first lens and the second lens on optical axis optics total length TTL
0.8 ＜ (T12*10)/TTL ＜ 1.5 can be met, more specifically, T12 and TTL can further meet 0.81≤(T12*10)/TTL
≤1.49.Reasonable disposition T12 and TTL may be such that camera lens has more compact structure, while the susceptibility of camera lens can be reduced, carry
Rise image quality.
The edge thickness ET4 and the 4th lens of 4th lens can meet 1 ＜ ET4/ between the center thickness CT4 on optical axis
CT4 ＜ 1.5, more specifically, ET4 and CT4 can further meet 1.08≤ET4/CT4≤1.36, to realize to chief ray angle
Correction, lifted camera lens relative illumination.
Alternatively, the image side surface of the 4th lens can (that is, the image side surface of the 4th lens be by center with least one point of inflexion
At least have to edge by the convex variation tendency of concave change) so that the image side surface of the 4th lens is at paraxial place for concave surface and remote
It is convex surface at the periphery of optical axis, so as to be effectively reduced susceptibility；Meanwhile, such face type arrangement can also effectively suppress off-axis
The angle of field rays incidence photo-sensitive cell, increases the receiving efficiency of photo-sensitive cell, and further correct the aberration of off-axis visual field.
Can between the effective radius DT22 of the effective radius DT12 of the image side surface of first lens and the image side surface of the second lens
0.7 ＜ DT12/DT22 ＜ 1.3 are met, more specifically, DT12 and DT22 can further meet 0.78≤DT12/DT22≤1.27,
To realize effect of wide-angle.
Can between the effective radius DT32 of the effective radius DT11 of the thing side of first lens and the image side surface of the 3rd lens
0.9 ＜ DT11/DT32 ＜ 1.3 are met, more specifically, DT11 and DT32 can further meet 1.00≤DT11/DT32≤1.20,
To reduce the susceptibility of camera lens, image quality is lifted.
The image side surface of 4th lens and the intersection point of optical axis are to the effective radius summit of the image side surface of the 4th lens on optical axis
0.2 ＜ SAG42/CT4 ＜ 0.6 can be met between the center thickness CT4 on optical axis apart from SAG42 and the 4th lens, more
Body, SAG42 and CT4 can further meet 0.29≤SAG42/CT4≤0.58.Reasonable disposition SAG42 and CT4 can effectively drop
The susceptibility of low camera lens, lifts image quality.
The half ImgH of the effective pixel area diagonal line length of photo-sensitive cell and pick-up lens on pick-up lens imaging surface
ImgH/f ＞ 1 are met between total effective focal length f, more specifically, ImgH and f can further meet 1.10≤ImgH/f≤1.13,
To realize imaging of the photo-sensitive cell to larger thing side space.
Alternatively, above-mentioned pick-up lens may also include the optical filter being arranged between the 4th lens and imaging surface, the optical filtering
Piece can be bandpass filter, and its band-pass wavelength can be about 400nm to about 800nm.Optical filter can be used for filtering unwanted spectrum
Scope, so as to lift the image quality of camera lens.
Alternatively, above-mentioned pick-up lens may also include the protective glass for being located at photo-sensitive cell on imaging surface for protecting.
Alternatively, in order to meet light-weighted requirement, each lens in above-mentioned pick-up lens can use glass lens.
Pick-up lens described above can be prevented effectively from and be caused because number of lenses is excessive using such as four lens
The problem of camera lens volume is excessive and quality is overweight, and it is advantageously implemented the miniaturization and lightweight of camera lens.It is each by reasonable distribution
Spacing etc. on power of lens, face type, the axle between the center thickness of each lens and each lens, according to the above-mentioned reality of the application
The expansion of the angle of view, lens optical total length can be realized ensure image quality while by applying the pick-up lens of mode
Shorten the reduction with camera lens susceptibility, so as to provide a kind of being applicable to Portable device, compact conformation, height are as matter, muting sensitive
The wide-angle camera of sensitivity.
In presently filed embodiment, at least one in the minute surface of each lens is aspherical mirror.Non-spherical lens
The characteristics of be：It is consecutive variations from lens centre to periphery curvature.With there is the sphere of constant curvature from lens centre to periphery
Lens are different, and non-spherical lens has more preferably radius of curvature characteristic, distort aberration with improvement and improve the excellent of astigmatic image error
Point.After non-spherical lens, the aberration occurred when imaging can be eliminated as much as possible, so as to improve pick-up lens
Image quality.
However, it will be understood by those of skill in the art that without departing from this application claims technical scheme situation
Under, the lens numbers for constituting pick-up lens can be changed, to obtain each result and the advantage described in this specification.Though for example,
So it is described in embodiments by taking four lens as an example, but the pick-up lens is not limited to include four lens.If
Need, the pick-up lens may also include the lens of other quantity.
The specific embodiment for the pick-up lens for being applicable to above-mentioned embodiment is further described with reference to the accompanying drawings.
Embodiment 1
The pick-up lens according to the embodiment of the present application 1 is described referring to Fig. 1 to Fig. 2 C.Fig. 1 is shown according to the application
The structural representation of the pick-up lens of embodiment 1.
As shown in figure 1, pick-up lens sequentially includes the first lens L1, the second lens along optical axis from thing side into image side
L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Pick-up lens may also include the photosensitive member for being arranged at imaging surface S11
Part.
First lens L1 has positive light coke, and its thing side S1 is convex surface, and image side surface S2 is concave surface, and the first lens L1
Thing side S1 and image side surface S2 be aspherical.
Second lens L2 has positive light coke, and its thing side S3 is concave surface, and image side surface S4 is convex surface, and the second lens L2
Thing side S3 and image side surface S4 be aspherical.
3rd lens L3 has positive light coke, and its thing side S5 is concave surface, and image side surface S6 is convex surface, and the 3rd lens L3
Thing side S5 and image side surface S6 be aspherical.
4th lens L4 has positive light coke, and its thing side S7 is convex surface, and image side surface S8 is concave surface, and the 4th lens L4
Thing side S7 and image side surface S8 be aspherical.
Alternatively, pick-up lens may also include the optical filter L5 with thing side S9 and image side surface S10.Optical filter L5 can be
Bandpass filter, its band-pass wavelength may range from about 400nm to about 800nm.
Alternatively, the diaphragm STO of confine optical beam can be provided between the first lens L1 and the second lens L2, to be lifted
The image quality of pick-up lens.
Table 1 shows surface type, radius of curvature, thickness, material and the circular cone of each lens of the pick-up lens of embodiment 1
Coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).
Table 1
As shown in Table 1, the 3rd lens L3 thing side S5 lens L3 of radius of curvature R 5 and the 3rd image side surface S6 song
R5/R6=0.76 is met between rate radius R6.
In the present embodiment, each aspherical face type x is limited by below equation：
Wherein, x be it is aspherical along optical axis direction height be h position when, away from aspheric vertex of surface apart from rise；C is
Aspherical paraxial curvature, c=1/R (that is, paraxial curvature c is the mean curvature radius R of upper table 1 inverse)；K be circular cone coefficient (
Provided in table 1)；Ai is the correction factor of aspherical i-th-th ranks.Table 2 below is given available for each aspherical in embodiment 1
Minute surface S1-S8 high order term coefficient A4、A6、A8、A10、A12、A14And A16。
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 2.9247E-02 | 1.5296E-02 | -2.4691E-02 | 1.9903E-02 | -1.4463E-04 | -5.9714E-03 | 2.2840E-03 |
| S2 | 1.1008E-01 | -1.4043E-01 | 9.9462E-02 | 2.7193E-01 | -7.8784E-01 | 7.8026E-01 | -2.8649E-01 |
| S3 | -2.1330E-01 | -2.3131E-01 | -4.4516E-01 | 3.0224E-01 | 5.0344E-12 | 5.7851E-13 | -5.3988E-13 |
| S4 | -4.8956E-02 | 3.2558E-01 | -3.6404E-01 | 5.8302E-02 | 4.8752E-02 | 1.8133E-09 | 3.0810E-10 |
| S5 | 1.2505E-01 | -1.3994E-01 | 3.2332E-01 | -1.6067E-01 | -1.1485E-03 | 1.9611E-03 | 6.5385E-03 |
| S6 | -3.8901E-02 | 4.7375E-02 | -9.1492E-02 | 5.0488E-02 | 9.3052E-04 | 8.3495E-05 | 6.9163E-05 |
| S7 | -2.0272E-01 | 6.4779E-02 | -2.8490E-02 | 6.9829E-03 | -6.7768E-04 | 1.3197E-05 | -2.2037E-06 |
| S8 | -2.0575E-01 | 8.1546E-02 | -3.5375E-02 | 1.0383E-02 | -1.9585E-03 | 2.0925E-04 | -9.5339E-06 |
Table 2
Table 3 below provides total effective focal length f of the pick-up lens of embodiment 1, effective focal length f1 to f4, the camera lens of each lens
Optics total length TTL (that is, the distance from the first lens L1 thing side S1 to imaging surface S11 on optical axis), the camera lens of head
Half ImgH, the maximum angle of half field-of view of pick-up lens of the effective pixel area diagonal line length of photo-sensitive cell on head imaging surface S11
HFOV and pick-up lens F-number Fno.
| Parameter | f(mm) | f1(mm) | f2(mm) | f3(mm) | f4(mm) |
| Numerical value | 2.14 | 14.01 | 2.35 | 73.90 | 13.91 |
| Parameter | TTL(mm) | ImgH(mm) | HFOV(°) | Fno | |
| Numerical value | 4.59 | 2.42 | 50.23 | 2.25 |
Table 3
It can be obtained according to table 3, f1/ is met between the first lens L1 effective focal length f1 and the second lens L2 effective focal length f2
F2=5.97；The half ImgH and camera lens of the effective pixel area diagonal line length of photo-sensitive cell on pick-up lens imaging surface S11
ImgH/f=1.13 is met between total effective focal length f of head.It can be obtained by table 1 and table 3, the second lens L2 is thick in the center on optical axis
CT2/TTL=0.15 is met between degree CT2 and the optics total length TTL of pick-up lens；First lens L1 and the second lens L2 exist
(T12*10)/TTL=1.10 is met between the optics total length TTL of spacing distance T12 and pick-up lens on optical axis.
In embodiment 1, the 4th lens L4 edge thickness ET4 and the 4th lens L4 is in the center thickness CT4 on optical axis
Between meet ET4/CT4=1.09；First lens L1 image side surface S2 effective radius DT12 and the second lens L2 image side surface
DT12/DT22=0.99 is met between S4 effective radius DT22；First lens L1 thing side S1 effective radius DT11 with
DT11/DT32=1.00 is met between 3rd lens L3 image side surface S6 effective radius DT32；4th lens L4 image side surfaces S8
With on intersection point to the axle on the 4th lens L4 image side surfaces S8 effective radius summit of optical axis apart from SAG42 and the 4th lens L4 in light
SAG42/CT4=0.58 is met between center thickness CT4 on axle.
In the present embodiment, HFOV=50.23 ° of the maximum angle of half field-of view of pick-up lens, with larger field scope.
Fig. 2A shows chromatic curve on the axle of the pick-up lens of embodiment 1, and it represents the light of different wave length via mirror
Converging focal point after head deviates.Fig. 2 B show the astigmatism curve of the pick-up lens of embodiment 1, its represent meridianal image surface bending and
Sagittal image surface is bent.Fig. 2 C show the distortion curve of the pick-up lens of embodiment 1, and it represents the distortion in the case of different visual angles
Sizes values.Understand that the pick-up lens given by embodiment 1 can realize good image quality according to Fig. 2A to Fig. 2 C.
Embodiment 2
The pick-up lens according to the embodiment of the present application 2 is described referring to Fig. 3 to Fig. 4 C.In the present embodiment and following implementation
In example, for brevity, by clipped description similar to Example 1.Fig. 3 shows taking the photograph according to the embodiment of the present application 2
As the structural representation of camera lens.
As shown in figure 3, pick-up lens sequentially includes the first lens L1, the second lens along optical axis from thing side into image side
L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Pick-up lens may also include the photosensitive member for being arranged at imaging surface S11
Part.
First lens L1 has positive light coke, and its thing side S1 is convex surface, and image side surface S2 is concave surface, and the first lens L1
Thing side S1 and image side surface S2 be aspherical.
Second lens L2 has positive light coke, and its thing side S3 is convex surface, and image side surface S4 is convex surface, and the second lens L2
Thing side S3 and image side surface S4 be aspherical.
3rd lens L3 has positive light coke, and its thing side S5 is concave surface, and image side surface S6 is convex surface, and the 3rd lens L3
Thing side S5 and image side surface S6 be aspherical.
4th lens L4 has positive light coke, and its thing side S7 is convex surface, and image side surface S8 is concave surface, and the 4th lens L4
Thing side S7 and image side surface S8 be aspherical.
Alternatively, pick-up lens may also include the optical filter L5 with thing side S9 and image side surface S10.Optical filter L5 can be
Bandpass filter, its band-pass wavelength may range from about 400nm to about 800nm.
Alternatively, the diaphragm STO of confine optical beam can be provided between the first lens L1 and the second lens L2, to be lifted
The image quality of pick-up lens.
Table 4 shows surface type, radius of curvature, thickness, material and the circular cone of each lens of the pick-up lens of embodiment 2
Coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).Table 5 is shown available for each aspherical mirror in embodiment 2
The high order term coefficient in face, wherein, the formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.Table 6 is shown
Total effective focal length f, the effective focal length f1 to f4 of each lens, the optics total length of pick-up lens of the pick-up lens of embodiment 2
The half ImgH of the effective pixel area diagonal line length of photo-sensitive cell, pick-up lens be most on TTL, pick-up lens imaging surface S11
Big angle of half field-of view HFOV and pick-up lens F-number Fno.
Table 4
Table 5
| Parameter | f(mm) | f1(mm) | f2(mm) | f3(mm) | f4(mm) |
| Numerical value | 2.20 | 25.73 | 3.67 | 8.01 | 11.53 |
| Parameter | TTL(mm) | ImgH(mm) | HFOV(°) | Fno | |
| Numerical value | 4.56 | 2.41 | 49.88 | 2.25 |
Table 6
Fig. 4 A show chromatic curve on the axle of the pick-up lens of embodiment 2, and it represents the light of different wave length via mirror
Converging focal point after head deviates.Fig. 4 B show the astigmatism curve of the pick-up lens of embodiment 2, its represent meridianal image surface bending and
Sagittal image surface is bent.Fig. 4 C show the distortion curve of the pick-up lens of embodiment 2, and it represents the distortion in the case of different visual angles
Sizes values.Understand that the pick-up lens given by embodiment 2 can realize good image quality according to Fig. 4 A to Fig. 4 C.
Embodiment 3
The pick-up lens according to the embodiment of the present application 3 is described referring to Fig. 5 to Fig. 6 C.Fig. 5 is shown according to this Shen
Please embodiment 3 pick-up lens structural representation.
As shown in figure 5, pick-up lens sequentially includes the first lens L1, the second lens along optical axis from thing side into image side
L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Pick-up lens may also include the photosensitive member for being arranged at imaging surface S11
Part.
First lens L1 has positive light coke, and its thing side S1 is convex surface, and image side surface S2 is concave surface, and the first lens L1
Thing side S1 and image side surface S2 be aspherical.
Second lens L2 has positive light coke, and its thing side S3 is concave surface, and image side surface S4 is convex surface, and the second lens L2
Thing side S3 and image side surface S4 be aspherical.
3rd lens L3 has negative power, and its thing side S5 is concave surface, and image side surface S6 is convex surface, and the 3rd lens L3
Thing side S5 and image side surface S6 be aspherical.
4th lens L4 has positive light coke, and its thing side S7 is convex surface, and image side surface S8 is concave surface, and the 4th lens L4
Thing side S7 and image side surface S8 be aspherical.
Alternatively, pick-up lens may also include the optical filter L5 with thing side S9 and image side surface S10.Optical filter L5 can be
Bandpass filter, its band-pass wavelength may range from about 400nm to about 800nm.
Alternatively, the diaphragm STO of confine optical beam can be provided between the first lens L1 and the second lens L2, to be lifted
The image quality of pick-up lens.
Table 7 shows surface type, radius of curvature, thickness, material and the circular cone of each lens of the pick-up lens of embodiment 3
Coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).Table 8 is shown available for each aspherical mirror in embodiment 3
The high order term coefficient in face, wherein, the formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.Table 9 is shown
Total effective focal length f, the effective focal length f1 to f4 of each lens, the optics total length of pick-up lens of the pick-up lens of embodiment 3
The half ImgH of the effective pixel area diagonal line length of photo-sensitive cell, pick-up lens be most on TTL, pick-up lens imaging surface S11
Big angle of half field-of view HFOV and pick-up lens F-number Fno.
Table 7
Table 8
| Parameter | f(mm) | f1(mm) | f2(mm) | f3(mm) | f4(mm) |
| Numerical value | 2.15 | 11.65 | 1.94 | -8.12 | 13.67 |
| Parameter | TTL(mm) | ImgH(mm) | HFOV(°) | Fno | |
| Numerical value | 4.62 | 2.41 | 50.52 | 2.25 |
Table 9
Fig. 6 A show chromatic curve on the axle of the pick-up lens of embodiment 3, and it represents the light of different wave length via mirror
Converging focal point after head deviates.Fig. 6 B show the astigmatism curve of the pick-up lens of embodiment 3, its represent meridianal image surface bending and
Sagittal image surface is bent.Fig. 6 C show the distortion curve of the pick-up lens of embodiment 3, and it represents the distortion in the case of different visual angles
Sizes values.Understand that the pick-up lens given by embodiment 3 can realize good image quality according to Fig. 6 A to Fig. 6 C.
Embodiment 4
The pick-up lens according to the embodiment of the present application 4 is described referring to Fig. 7 to Fig. 8 C.Fig. 7 is shown according to this Shen
Please embodiment 4 pick-up lens structural representation.
As shown in fig. 7, pick-up lens sequentially includes the first lens L1, the second lens along optical axis from thing side into image side
L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Pick-up lens may also include the photosensitive member for being arranged at imaging surface S11
Part.
First lens L1 has positive light coke, and its thing side S1 is convex surface, and image side surface S2 is concave surface, and the first lens L1
Thing side S1 and image side surface S2 be aspherical.
Second lens L2 has positive light coke, and its thing side S3 is concave surface, and image side surface S4 is convex surface, and the second lens L2
Thing side S3 and image side surface S4 be aspherical.
3rd lens L3 has positive light coke, and its thing side S5 is concave surface, and image side surface S6 is convex surface, and the 3rd lens L3
Thing side S5 and image side surface S6 be aspherical.
4th lens L4 has negative power, and its thing side S7 is convex surface, and image side surface S8 is concave surface, and the 4th lens L4
Thing side S7 and image side surface S8 be aspherical.
Alternatively, pick-up lens may also include the optical filter L5 with thing side S9 and image side surface S10.Optical filter L5 can be
Bandpass filter, its band-pass wavelength may range from about 400nm to about 800nm.
Alternatively, the diaphragm STO of confine optical beam can be provided between the first lens L1 and the second lens L2, to be lifted
The image quality of pick-up lens.
Table 10 shows surface type, radius of curvature, thickness, material and the circle of each lens of the pick-up lens of embodiment 4
Coefficient is bored, wherein, the unit of radius of curvature and thickness is millimeter (mm).Table 11 is shown available for each aspheric in embodiment 4
The high order term coefficient of face minute surface, wherein, the formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.Table 12 shows
The total effective focal length f, the effective focal length f1 to f4 of each lens, the optics overall length of pick-up lens of the pick-up lens of embodiment 4 are gone out
Spend TTL, the half ImgH of the effective pixel area diagonal line length of photo-sensitive cell on pick-up lens imaging surface S11, pick-up lens
Maximum angle of half field-of view HFOV and pick-up lens F-number Fno.
Table 10
Table 11
| Parameter | f(mm) | f1(mm) | f2(mm) | f3(mm) | f4(mm) |
| Numerical value | 2.20 | 14.72 | 2.60 | 4.29 | -5.16 |
| Parameter | TTL(mm) | ImgH(mm) | HFOV(°) | Fno | |
| Numerical value | 5.01 | 2.41 | 49.96 | 2.25 |
Table 12
Fig. 8 A show chromatic curve on the axle of the pick-up lens of embodiment 4, and it represents the light of different wave length via mirror
Converging focal point after head deviates.Fig. 8 B show the astigmatism curve of the pick-up lens of embodiment 4, its represent meridianal image surface bending and
Sagittal image surface is bent.Fig. 8 C show the distortion curve of the pick-up lens of embodiment 4, and it represents the distortion in the case of different visual angles
Sizes values.Understand that the pick-up lens given by embodiment 4 can realize good image quality according to Fig. 8 A to Fig. 8 C.
To sum up, embodiment 1 to embodiment 4 meets the relation shown in table 13 below respectively.
| Conditional embodiment | 1 | 2 | 3 | 4 |
| ImgH/f | 1.13 | 1.10 | 1.12 | 1.10 |
| f1/f2 | 5.97 | 7.00 | 6.01 | 5.66 |
| R5/R6 | 0.76 | 1.00 | 0.72 | 1.14 |
| CT2/TTL | 0.15 | 0.18 | 0.21 | 0.14 |
| (T12*10)/TTL | 1.10 | 0.81 | 1.37 | 1.49 |
| ET4/CT4 | 1.09 | 1.08 | 1.09 | 1.36 |
| DT12/DT22 | 0.99 | 0.78 | 1.24 | 1.27 |
| DT11/DT32 | 1.00 | 1.02 | 1.20 | 1.11 |
| SAG42/CT4 | 0.58 | 0.32 | 0.29 | 0.38 |
Table 13
The application also provides a kind of camera device, and its electronics photo-sensitive cell can be photosensitive coupling element (CCD) or complementation
Property matal-oxide semiconductor element (CMOS).Camera device can be such as digital camera independent picture pick-up device or
It is integrated in the photographing module on the mobile electronic devices such as mobile phone.The camera device is equipped with pick-up lens described above.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.People in the art
Member should be appreciated that invention scope involved in the application, however it is not limited to the technology of the particular combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, is carried out by above-mentioned technical characteristic or its equivalent feature
Other technical schemes formed by any combination.Such as features described above has similar work(with (but not limited to) disclosed herein
The technical characteristic of energy carries out technical scheme formed by replacement mutually.
Claims (13)
1. pick-up lens, is sequentially included along optical axis by thing side to image side：The first lens, the second lens with focal power, the 3rd
Lens and the 4th lens, it is characterised in that
At least one in first lens and second lens has positive light coke；
The thing of 3rd lens is sideways concave surface with the image side surface of the 4th lens；And
The half ImgH of effective pixel area diagonal line length and the pick-up lens always has on the imaging surface of the pick-up lens
Effect focal length f meets ImgH/f ＞ 1.
2. pick-up lens according to claim 1, it is characterised in that first lens and second lens are respectively provided with
Positive light coke；
The effective focal length f1 of first lens and second lens effective focal length f2 meet 3 ＜ f1/f2≤7.
3. pick-up lens according to claim 2, it is characterised in that the radius of curvature R 5 of the 3rd lens thing side with
The radius of curvature R 6 of the 3rd lens image side surface meets 0.7 ＜ R5/R6 ＜ 1.2.
4. pick-up lens according to claim 2, it is characterised in that the pick-up lens also includes being arranged at described first
Diaphragm between lens and second lens.
5. pick-up lens according to claim 4, it is characterised in that the thing side of first lens is convex surface, described
The image side surface of second lens is convex surface.
6. pick-up lens according to claim 2, it is characterised in that second lens are thick in the center on the optical axis
Spend CT2 full apart from TTL on the optical axis to the pick-up lens imaging surface with the center of the thing side of first lens
0.1 ＜ CT2/TTL ＜ 0.22 of foot.
7. pick-up lens according to claim 5, it is characterised in that first lens and second lens are described
The center of the thing side of spacing distance T12 and first lens on optical axis is to the pick-up lens imaging surface in the optical axis
On meet 0.8 ＜ (T12*10)/TTL ＜ 1.5 apart from TTL.
8. pick-up lens according to claim 2, it is characterised in that the edge thickness ET4 of the 4th lens with it is described
4th lens meet 1 ＜ ET4/CT4 ＜ 1.5 in the center thickness CT4 on the optical axis.
9. pick-up lens according to claim 5, it is characterised in that the effective radius DT12 of the first lens image side surface
0.7 ＜ DT12/DT22 ＜ 1.3 are met with the effective radius DT22 of the second lens image side surface.
10. pick-up lens according to claim 5, it is characterised in that the effective radius of the first lens thing side
DT11 and the 3rd lens image side surface effective radius DT32 meet 0.9 ＜ DT11/DT32 ＜ 1.3.
11. pick-up lens according to claim 2, it is characterised in that the 4th lens image side surface and the optical axis
Intersection point to the effective radius summit of the 4th lens image side surface on the optical axis apart from SAG42 and the 4th lens in
Center thickness CT4 on the optical axis meets 0.2 ＜ SAG42/CT4 ＜ 0.6.
12. the pick-up lens according to any one of claim 1 to 11, it is characterised in that the pick-up lens also includes
It is arranged at the bandpass filter between the 4th lens and the pick-up lens imaging surface, the band logical ripple of the bandpass filter
Long scope is 400nm to 800nm.
13. pick-up lens, is sequentially included along optical axis by thing side to image side：First lens, the second lens, the 3rd lens and the 4th
Lens, it is characterised in that
First lens and second lens are respectively provided with positive light coke；
3rd lens have positive light coke or negative power, and its thing side is concave surface；
4th lens have positive light coke or negative power, and its image side surface is concave surface；And
The edge thickness ET4 of 4th lens meets 1 ＜ with the 4th lens in the center thickness CT4 on the optical axis
ET4/CT4 ＜ 1.5.
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| CN201710585219.6A CN107144943B (en) | 2017-07-18 | 2017-07-18 | Camera lens |
| PCT/CN2018/077206 WO2019015324A1 (en) | 2017-07-18 | 2018-02-26 | Camera lens |
| US16/212,008 US10962739B2 (en) | 2017-07-18 | 2018-12-06 | Camera lens assembly |
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| CN201710585219.6A CN107144943B (en) | 2017-07-18 | 2017-07-18 | Camera lens |
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| CN112882208A (en) * | 2019-11-29 | 2021-06-01 | 上海微电子装备（集团）股份有限公司 | Large-field-of-view imaging objective lens |
| CN112882208B (en) * | 2019-11-29 | 2022-08-02 | 上海微电子装备（集团）股份有限公司 | Large-field-of-view imaging objective lens |
| CN114114637A (en) * | 2021-12-13 | 2022-03-01 | 浙江舜宇光学有限公司 | Image pickup lens group |
| CN114114637B (en) * | 2021-12-13 | 2024-03-08 | 浙江舜宇光学有限公司 | Image pickup lens group |
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