CN104765131B - A kind of high-quality fidelity CCD camera assembly of low sensitivity - Google Patents
A kind of high-quality fidelity CCD camera assembly of low sensitivity Download PDFInfo
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- CN104765131B CN104765131B CN201510185843.8A CN201510185843A CN104765131B CN 104765131 B CN104765131 B CN 104765131B CN 201510185843 A CN201510185843 A CN 201510185843A CN 104765131 B CN104765131 B CN 104765131B
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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
- G02B13/0035—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 three lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
The invention discloses a kind of high-quality fidelity CCD camera assembly of low sensitivity.Along its optical axis, direction includes the CCD camera assembly successively from the object side to image side：First lens of one positive light coke, it has one towards the convex surface of thing side and one towards the convex surface of image side；One positive light coke and the lens of curved month type second for bending towards object space, it has the concave surface towards thing side；3rd lens of one negative power；An and imaging surface；One optical filter, the optical filter is between the 3rd lens and described imaging surface；One diaphragm, the diaphragm is between object space and the first lens, also, above-mentioned CCD camera assembly meets following condition：(1)、0.7<F/F1<1.2,1.5<F3/F2<‑0.7；(2)、0.6<F12/Y<1.4；(3)、4<T12/T23<11；(4)、0.2<BL/TTL<0.6；CCD camera assembly of the present invention is directed to current high pixel and takes pictures digital product and design, and it has the characteristics of low sensitivity high-quality fidelity, and on the premise of meeting to be miniaturized, and can ensures high image quality, while the CCD camera assembly has relatively low susceptibility.
Description
Technical field：
The present invention relates to camera product technical field, more particularly to a kind of high-quality fidelity CCD camera assembly of low sensitivity.
Background technology：
With the development of science and technology, all kinds of digital product functions is increasing, such as all it is integrated with many digital products
CCD camera assembly.But with the continuous renewal of product, requirement of the consumer for image quality of being taken a picture in digital product also with when it is all
Enter.Since looking back the more than ten years being born from camera cell phone in 2000, camera function progressively permeates the mobile phone of nearly all model, and
Gradually ripe, single in terms of pixel this angle, camera lens has changed to million pictures of current main flow from original hundreds of thousands pixel
Plain camera lens, picture quality gradually turn for the better；Another aspect, in the case where being driven for the constantly lightening requirement of mobile terminal, hand
Machine, the size of photolithography module are also lightening in continuous microminiaturization, thickness.This, which just needs to design, can meet that mobile phone is micro-
The requirement of type, and can ensure the camera lens of high image quality.
Existing miniaturization phtographic lens, to reduce manufacturing cost, adopt based on two-piece type lens arrangement more, be not enough to very well
Amendment balance difference, but configuring excessive eyeglass will cause camera lens total length to be difficult to reach small form factor requirements, can also increase manufacture
Cost, therefore can be as the preferred scheme of design using the lens system of three eyeglass compositions.
Shooting CCD camera assembly on three-chip type is at present it is proposed that related technical scheme, for example, in seeing
State's number of patent application is：200610086486.0 application for a patent for invention publication document, it discloses a kind of " three piece type camera mirror
Piece group ", the photographic lens group of the present patent application include one first eyeglass group, one second eyeglass group, one the 3rd eyeglass group and one
Be open aperture, wherein, the first eyeglass group is positive concave-convex lens, and it is somebody's turn to do convex surface facing thing side, and separately facing to the opening aperture
One second eyeglass group, is positive concave-convex lens, and it is convex surface facing the opening aperture and towards thing side, and the 3rd eyeglass group
Biconcave lens, its with the larger concave surface of curvature towards the second eyeglass group and towards thing side, and separately facing to as survey, in addition, should
First eyeglass group, the second eyeglass group and its respective two sides of the 3rd eyeglass group are all by aspherical glass lens institute shape
Into.Although the patent application employs the pick-up lens group of three-chip type, Shortcomings in the selection of its lens prescriptions, lead
Optical sensitive degree is caused not reduce effectively, and the entire length of lens group still suffers from the space further reduced.
The content of the invention：
The technical problems to be solved by the invention are overcome the deficiencies in the prior art, there is provided a kind of high quality guarantee of low sensitivity
True CCD camera assembly.
In order to solve the above-mentioned technical problem, present invention employs following technical proposals：The CCD camera assembly along its optical axis from
Thing side includes successively to image side direction：First lens of one positive light coke, it has one towards the convex surface of thing side and one
Towards the convex surface of image side；One positive light coke and the lens of curved month type second for bending towards object space, it has the concave surface towards thing side；One
3rd lens of individual negative power；An and imaging surface；One optical filter, the optical filter be located at the 3rd lens with it is described
Between imaging surface；One diaphragm, the diaphragm is between object space and the first lens, also, above-mentioned CCD camera assembly meets
Following condition：(1)、0.7<F/F1<1.2-1.5<F3/F2<-0.7；(2)、0.6<F12/Y<1.4；(3)、4<T12/T23<11；
(4)、0.2<BL/TTL<0.6；In above-mentioned condition, F is the total focal length of the CCD camera assembly；F1 is Jiao of first lens
Away from；F12 is the combined focal length of the first lens and the second lens in the CCD camera assembly；Y is the image height of the CCD camera assembly；
BL is that the 3rd lens exit facet of the CCD camera assembly arrives the distance between image planes；T12 be the first lens and the second lens in
Spacing distance on optical axis；T23 is the second lens and the 3rd lens in the spacing distance on optical axis；TTL:The CCD camera assembly
Total length.
Furthermore, in above-mentioned technical proposal, the radius of curvature of the second described lens thing side surface is R3, described
The radius of curvature of two lens image sides surface is R4, and R3, R4 meet：-4.5<(R3+R4)/(R3-R4)<-1.5.
Or in above-mentioned technical proposal, the first described lens, the second lens, the Abbe number of the 3rd lens are respectively：
Vd1, Vd2, Vd3, and Vd1, Vd2, Vd3 meet：(Vd1+Vd3)/Vd2>1
Or in above-mentioned technical proposal, the first described lens, the refractive index of the 3rd lens are respectively：N1, n3, and
And n1, n3 meet：n3-n1>0.1.
Furthermore, in above-mentioned all technical schemes, the radius of curvature of the first described lens thing side surface is R1,
The radius of curvature on the first described lens image side surface is R2, and R1, R2 meet：-7<R2/R1<-4.It is or above-mentioned all
In technical scheme, the radius of curvature on the first described lens image side surface is R2, and R2, F meet：-3.5<R2/F<-0.5.
Furthermore, in above-mentioned technical proposal, the first described lens, the second lens, the thing side surface of the 3rd lens
It is aspherical with image side surface.
Furthermore, in above-mentioned technical proposal, a protection glass is provided between described optical filter and imaging surface
Glass, the thickness of the protective glass is 0.40mm.
Furthermore, in above-mentioned all technical schemes, described filter thickness is 0.21mm.
The CCD camera assembly that the present invention is formed using above-mentioned technical proposal, its overall volume (along optical axis direction) can be with
Further compression, and there is advantages below relative to current two-piece type lens arrangement, the present invention：
1st, CCD camera assembly of the present invention is directed to current high pixel and takes pictures digital product and design, and it has muting sensitive sense
The characteristics of spending high-quality fidelity.On the premise of meeting to be miniaturized, and can ensures high image quality, while the CCD camera assembly has
There is relatively low susceptibility.Eyeglass assembling is more prone to during production, under the conditions of technology manufacture eyeglass is not accurate enough
Still there is the preferable imaging effect that can reach close to design load.
2nd, the present invention substitutes glass, shaping using the structure of three aspherical lens using resins for universal use material on the market
Technique is more ripe, solves the problems, such as that glass lens product yield caused by processing difficulties is low and cost is higher.
3rd, the point of inflexion is designed with the 3rd lens thing side surface of the invention, effectively converges Off-axis-light, be incident upon
Angle on photo-sensitive cell is more coincide with the default angle of chip, and can further modified off-axis visual field aberration.
4th, the optical distortion of CCD camera assembly of the present invention is less than 2%, and the curvature of field is less than 0.1mm, and spherical aberration is less than 5um, is imaged picture
Face distortion is small, and definition is high.5000000 pixels ensure that shooting picture effect is clear, and color is full, and stereovision is enriched.2.2 large aperture
Design, within certain time for exposure increase shooting process light-inletting quantity, ensure that the light levels of shooting picture.
Brief description of the drawings：
Fig. 1 is the structural representation of the embodiment of the present invention one；
Fig. 2 is the characteristics of three lens in the embodiment of the present invention one；
Fig. 3 is the curvature of field and distortion figure of the embodiment of the present invention one；
Fig. 4 is the spherical aberration figure of the embodiment of the present invention one；
Fig. 5 is the structural representation of the embodiment of the present invention two；
Fig. 6 is the characteristics of three lens in the embodiment of the present invention two；
Fig. 7 is the curvature of field and distortion figure of the embodiment of the present invention two；
Fig. 8 is the spherical aberration figure of the embodiment of the present invention two；
Fig. 9 is the structural representation of the embodiment of the present invention three；
Figure 10 is the characteristics of three lens in the embodiment of the present invention three；
Figure 11 is the curvature of field and distortion figure of the embodiment of the present invention three；
Figure 12 is the spherical aberration figure of the embodiment of the present invention three；
Figure 13 is the structural representation of the embodiment of the present invention four；
Figure 14 is the characteristics of three lens in the embodiment of the present invention four；
Figure 15 is the curvature of field and distortion figure of the embodiment of the present invention four；
Figure 16 is the spherical aberration figure of the embodiment of the present invention four；
Embodiment：
The present invention is a kind of CCD camera assembly being used in digital product.As shown in Fig. 1-Fig. 4, this is the implementation of the present invention
Example one.Along its optical axis, direction (from left to right) includes the CCD camera assembly successively from the object side to image side：Diaphragm 1, the first lens 2,
Second lens 3, the 3rd lens 4, optical filter 5, imaging surface 7.
The first described saturating 2 mirror is the lens of a positive light coke, and it has one towards the convex surface of thing side and a court
To the convex surface of image side.
The second described lens 3 are a positive light coke and bend towards the meniscus lens of object space, and it has towards thing side
Concave surface and the convex surface towards image side.
The 3rd described lens 4 are the lens of a negative power, and the point of inflexion is designed with the 3rd lens thing side surface,
Effectively convergence Off-axis-light, the angle being incident upon on photo-sensitive cell is more coincide with the default angle of chip, and can be entered
The aberration of one step modified off-axis visual field.
In the present invention, the first described lens 2, the second lens 3, the thing side surface of the 3rd lens 4 and image side surface are
It is aspherical, and three lens are made using resin material.First lens 2 are lenticular lens, and the second lens 3 are curved month type
Lens, wherein be concave surface towards the first lens 2 sides, the light of such thing side, will be saturating using second after the first lens
The concave surface of mirror 3 makes the optics of outgoing become gentle, effectively to correct aberration.
Described optical filter 5 is between the 3rd lens 4 and described imaging surface 7；Described diaphragm 1 be located at object space 8 with
Between first lens 2.A protective glass 6 is provided between described optical filter 5 and imaging surface 7.
Above-mentioned CCD camera assembly meets following condition：
(1)0.7<F/F1<1.2-1.5<F3/F2<-0.7
(2)0.6<F12/Y<1.4
(3)4<T12/T23<11
(4)0.2<BL/TTL<0.6
(5)--7<R2/R1<-4
(6)-4.5<(R3+R4)/(R3-R4)<-1.5
(7)(Vd1+Vd3)/Vd2>1
(8)n3-n1>0.1
F：The focal length of the CCD camera assembly；
Fn：The focal length of n-th lens；
F12:The combined focal length of the lens of CCD camera assembly first and the second lens；
Y:The image height of the CCD camera assembly；
BL:3rd lens exit facet of the CCD camera assembly arrives the distance between image planes；
TTL:The overall length of the CCD camera assembly；
T12：First lens and the second lens are in the spacing distance on optical axis；
T23：Second lens and the 3rd lens are in the spacing distance on optical axis；
R1：The radius of curvature of first lens thing side surface；
R2：The radius of curvature of first lens image side surface；
R3：The radius of curvature of second lens thing side surface；
R4：The radius of curvature of second lens image side surface；
Vdn：The Abbe number of n-th lens；
N1, n3:Respectively first, three index of refraction in lens.
Shown in Figure 2, this is the characteristics of three lens in the embodiment of the present invention one, wherein the CCD camera assembly
Focal length F=2.43mm, F-number FNO=2.2, FOV=75 ° of visual angle.
Described the first lens, the second lens, the thing side surface of the 3rd lens and image side surface meets below equation：
The diaphragm is arranged between object space and the first lens, and the glass filter is saturating positioned at the 3rd along object space to image space
Between mirror and the imaging surface of the system, its thickness is 0.21mm, and the protective glass piece is along object space to image space positioned at protection glass
Between glass and the imaging surface of the system, its thickness is 0.40mm, the center thicknesses of first lens for 0.585~
0.753mm, the center thickness of second lens is 0.565~0.712mm, and the center thickness of the 3rd lens is 0.356
~0.515mm.
As shown in Fig. 5-Fig. 8, this is embodiments of the invention two, and its structure is identical with above-described embodiment one, is only saturating
Slightly adjusted in the parameter of mirror.The CCD camera assembly of the present embodiment two equally meets following condition：
(1)0.7<F/F1<1.2 -1.5<F3/F2<-0.7
(2)0.6<F12/Y<1.4
(3)4<T12/T23<11
(4)0.2<BL/TTL<0.6
(5)-7<R2/R1<-4
(6)-4.5<(R3+R4)/(R3-R4)<-1.5
(7)(Vd1+Vd3)/Vd2>1
(8)n3-n1>0.1
F：The focal length of the CCD camera assembly；
Fn：The focal length of n-th lens；
F12:The combined focal length of the lens of CCD camera assembly first and the second lens；
Y:The image height of the CCD camera assembly；
BL:3rd lens exit facet of the CCD camera assembly arrives the distance between image planes；
TTL:The overall length of the CCD camera assembly；
T12：First lens and the second lens are in the spacing distance on optical axis；
T23：Second lens and the 3rd lens are in the spacing distance on optical axis；
R1：The radius of curvature of first lens thing side surface；
R2：The radius of curvature of first lens image side surface；
R3：The radius of curvature of second lens thing side surface；
R4：The radius of curvature of second lens image side surface；
Vdn：The Abbe number of n-th lens；
N1, n3:Respectively first, three index of refraction in lens.
Shown in Figure 6, this is the characteristics of three lens in the embodiment of the present invention two, wherein the CCD camera assembly
Focal length F=2.32mm, F-number FNO=2.2, FOV=75.8 ° of visual angle.
Described the first lens, the second lens, the thing side surface of the 3rd lens and image side surface meets below equation：
And the diaphragm is arranged between object space and the first lens, the glass filter is located at the 3rd along object space to image space
Between lens and the imaging surface of the system, its thickness is 0.21mm, and the protective glass piece is along object space to image space positioned at protection
Between glass and the imaging surface of the system, its thickness is 0.40mm, the center thicknesses of first lens for 0.496~
0.625mm, the center thickness of second lens is 0.586~0.713mm, and the center thickness of the 3rd lens is 0.336
~0.493mm.
As shown in Fig. 9-Figure 12, this is embodiments of the invention three, with above-mentioned two embodiment institute's difference at three
The characteristics of lens, the CCD camera assembly of the present embodiment three meet following condition：
(1)0.7<F/F1<1.2 -1.5<F3/F2<-0.7
(2)0.6<F12/Y<1.4
(3)4<T12/T23<11
(4)0.2<BL/TTL<0.6
(5)-3.5<R2/F<-0.5
(6)-4.5<(R3+R4)/(R3-R4)<-1.5
(7)(Vd1+Vd3)/Vd2>1
(8)n3-n1>0.1
F：The focal length of the CCD camera assembly；
Fn：The focal length of n-th lens；
F12:The combined focal length of the lens of CCD camera assembly first and the second lens；
Y:The image height of the CCD camera assembly；
BL:3rd lens exit facet of the CCD camera assembly arrives the distance between image planes；
TTL:The overall length of the CCD camera assembly；
T12：First lens and the second lens are in the spacing distance on optical axis；
T23：Second lens and the 3rd lens are in the spacing distance on optical axis；
R1：The radius of curvature of first lens thing side surface；
R2：The radius of curvature of first lens image side surface；
R3：The radius of curvature of second lens thing side surface；
R4：The radius of curvature of second lens image side surface；
Vdn：The Abbe number of n-th lens；
N1, n3:Respectively first, three index of refraction in lens.
The focal length F=2.34mm of CCD camera assembly, F-number FNO=2.2, visual angle FOV=wherein in the present embodiment
74.6°。
Described the first lens, the second lens, the thing side surface of the 3rd lens and image side surface meets below equation：
And the diaphragm 1 is arranged between the lens 2 of object space 8 and first, the glass filters 5 to be located at along object space to image space
Between 3rd lens 4 and the imaging surface 7 of the system, its thickness is 0.21mm, and the protective glass piece 6 is along object space 8 to image space
Between protective glass 6 and the imaging surface of the system 7, its thickness is 0.40mm, and the center thickness of first lens is
0.431~0.669mm, the center thicknesses of second lens are 0.549~0.695mm, the center thickness of the 3rd lens
For 0.439~0.584mm.
As shown in Figure 13-Figure 16, this is embodiments of the invention four, with above three embodiment institute's difference at three
The characteristics of lens, meanwhile, protective glass piece is reduced in the present embodiment.
The focal length F=2.34mm of CCD camera assembly, F-number FNO=2.4, FOV=76 ° of visual angle in the present embodiment.
Described the first lens, the second lens, the thing side surface of the 3rd lens and image side surface meets below equation：
In the present embodiment, and the diaphragm is arranged between object space and the first lens, the glass filter along object space extremely
Image space is between the 3rd lens and the imaging surface of the system, and its thickness is 0.21mm, the center thickness of first lens
For 0.715~0.776mm, the center thickness of second lens is 0.425~0.495mm, and the center of the 3rd lens is thick
Spend for 0.745~0.815mm.
Certainly, the foregoing is only the specific embodiment of the present invention, be not to limit the scope of the present invention, it is all according to
The equivalent change or modification that construction, feature and principle described in scope of the present invention patent are done, all should be included in Shen of the present invention
Please be in the scope of the claims.
Claims (9)
- A kind of 1. high-quality fidelity CCD camera assembly of low sensitivity, it is characterised in that：The CCD camera assembly along its optical axis from thing side to Image side direction includes successively：First lens of one positive light coke, it has one towards the convex surface of thing side and one towards the convex surface of image side；One positive light coke and the lens of curved month type second for bending towards object space, it has the concave surface towards thing side；3rd lens of one negative power；An and imaging surface；One optical filter, the optical filter is between the 3rd lens and described imaging surface；One diaphragm, the diaphragm between object space and the first lens,Also, above-mentioned CCD camera assembly meets following condition：(1)、0.7<F/F1<1.2, -1.5<F3/F2<-0.7；(2)、 0.6<F12/Y<1.4；(3)、4<T12/T23<11；(4)、0.2<BL/TTL<0.6；In above-mentioned condition, F is the total focal length of the CCD camera assembly；F1 is the focal length of first lens；F12 is the shooting The combined focal length of first lens and the second lens in head assembly；Y is the image height of the CCD camera assembly；BL is the camera group 3rd lens exit facet of part arrives the distance between image planes；T12 is the first lens and the second lens in the spacing distance on optical axis； T23 is the second lens and the 3rd lens in the spacing distance on optical axis；TTL:The total length of the CCD camera assembly；The radius of curvature of the second described lens thing side surface is R3, and the radius of curvature on the second lens image side surface is R4, And R3, R4 meet：-4.5<(R3+R4)/(R3-R4)<-1.5.
- A kind of 2. high-quality fidelity CCD camera assembly of low sensitivity according to claim 1, it is characterised in that：Described first Lens, the second lens, the Abbe number of the 3rd lens are respectively：Vd1, Vd2, Vd3, and Vd1, Vd2, Vd3 meet：(Vd1+ Vd3)/Vd2>1 。
- A kind of 3. high-quality fidelity CCD camera assembly of low sensitivity according to claim 1, it is characterised in that：Described first Lens, the refractive index of the 3rd lens are respectively：N1, n3, and n1, n3 meet：n3-n1>0.1.
- 4. the high-quality fidelity CCD camera assembly of a kind of low sensitivity according to any one in claim 1-3, its feature exist In：The radius of curvature of the first described lens thing side surface is R1, and the radius of curvature on the first described lens image side surface is R2, And R1, R2 meet：-7<R2/R1<-4.
- 5. the high-quality fidelity CCD camera assembly of a kind of low sensitivity according to any one in claim 1-3, its feature exist In：The radius of curvature on the first described lens image side surface is R2, and R2, F meet：-3.5<R2/F<-0.5.
- A kind of 6. high-quality fidelity CCD camera assembly of low sensitivity according to claim 1, it is characterised in that：Described first Lens, the second lens, the thing side surface of the 3rd lens and image side surface are aspherical.
- A kind of 7. high-quality fidelity CCD camera assembly of low sensitivity according to claim 4, it is characterised in that：In described filter A protective glass is provided between mating plate and imaging surface, the thickness of the protective glass is 0.40mm.
- A kind of 8. high-quality fidelity CCD camera assembly of low sensitivity according to claim 5, it is characterised in that：In described filter A protective glass is provided between mating plate and imaging surface, the thickness of the protective glass is 0.40mm.
- A kind of 9. high-quality fidelity CCD camera assembly of low sensitivity according to claim 1, it is characterised in that：Described optical filtering Piece thickness is 0.21mm.
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| CN105068223A (en) * | 2015-08-31 | 2015-11-18 | 苏州凯锝微电子有限公司 | Three-million-pixel mobile lens with good imaging |
| CN109828346B (en) * | 2018-12-26 | 2024-04-02 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN211698396U (en) * | 2019-10-23 | 2020-10-16 | 神盾股份有限公司 | Optical imaging lens |
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| CN103676086A (en) * | 2012-09-10 | 2014-03-26 | 大立光电股份有限公司 | Imaging lens assembly |
| CN204129317U (en) * | 2014-10-27 | 2015-01-28 | 东莞市旭业光电科技有限公司 | Wide-angle optical lens assembly |
| CN204945476U (en) * | 2015-04-17 | 2016-01-06 | 广东旭业光电科技股份有限公司 | The high-quality fidelity CCD camera assembly of a kind of low sensitivity |
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| CN104765131A (en) | 2015-07-08 |
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