CN101571623B - Zoom lens - Google Patents
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- CN101571623B CN101571623B CN2008100967616A CN200810096761A CN101571623B CN 101571623 B CN101571623 B CN 101571623B CN 2008100967616 A CN2008100967616 A CN 2008100967616A CN 200810096761 A CN200810096761 A CN 200810096761A CN 101571623 B CN101571623 B CN 101571623B
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Abstract
The invention provides a zoom lens comprising a plurality of lens groups. During zooming operation, the lens groups are arranged at a common optical axis and enable a first plane and a second plane tobe conjugate planes mutually through the zoom lens; when the zoom lens is retracted, at least one lens group turns to the outside of the common optical axis by a shaft vertical to the common optical axis and moves towards the first plane, and at least one left lens group moves from the first plane towards the second plane in the direction parallel to the common optical axis, thereby enabling the total length of the zoom lens being retracted to be shortened so as to be an ultrathin zoom lens.
Description
Technical field
The present invention relates to a kind of zoom lens, particularly a kind ofly be applicable on the electronic installation, the zoom lens of slimming after taking in.
Background technology
Along with the continuous development of science and technology, portable electronic apparatus as mobile computer, mobile phone, personal digital aid (PDA) (PDA) or hand held projector etc., has become one of trend of current development in science and technology with the mutual integration of photoelectric technology.For example, mobile phone capable of taking pictures combines mobile phone and camera lens exactly, and this can be as typical case's representative of this integration technology trend.The camera lens of camera mobile phone not only needs to have favorable imaging quality, also needs smaller volume and lower cost.
In order to reduce camera lens volume and manufacturing cost, in the present lens design, regular meeting adopts non-spherical lens.The spherical aberration that non-spherical lens can avoid spherical lens to produce, and the monolithic non-spherical lens can replace the multi-disc spherical lens and come aberration for compensation, can simplify the optical design of camera lens very significantly, reduces the volume and weight of camera lens.But the volume of camera lens is dwindled in optical design its limit is arranged; Particularly when the zooming range of camera lens is big.
In addition, in No. the 3742645th, the Jap.P., when receiving state, the some of zoom lens shifts and is drawn into heavy trunk, to reach the slimming of the lens barrel under receiving state from camera axis.Japanese Laid-Open Patent Application 2004-341154 number, also have in order not sacrifice the amount of movement of lens group, and lens are stretched out the method for the cam canister slimming of usefulness again.
Though existing disclosed document discloses the method for zoom lens slimming, from the angle of optical property, the good means of can not saying so.Therefore, still need a kind of method that can further dwindle zoom lens, and the situation of the lens eccentricity will avoid zoom lens to use the time takes place.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of zoom lens is provided, the length that adopts new structure further to dwindle zoom lens.
According to zoom lens of the present invention, this zoom lens comprises plural lens group, and when zoom operation, plural lens group is positioned at a common light axle, and makes one first plane and one second plane by this zoom lens conjugate plane each other.When this zoom lens is taken in, at least one lens group turn to outside the common optical axis with the axle perpendicular to common optical axis and towards first plane motion, at least one remaining lens group moves towards second plane from first plane with the direction that is parallel to common optical axis.
According to zoom lens of the present invention, this zoom lens comprises N lens group, is the 1st lens group to the N lens group in regular turn; When this zoom lens carries out zoom operation, N lens group is positioned at a common light axle, and make one first plane and one second plane by this zoom lens conjugate plane each other, when this zoom lens is taken in, arbitrary lens group except that the 1st lens group turn to outside the common optical axis and towards first plane motion with the axle perpendicular to common optical axis, and at least one remaining lens group moves towards second plane from first plane with the direction that is parallel to common optical axis.
According to zoom lens of the present invention, this zoom lens has the pedestal that contiguous second plane is provided with, extend and the protrusion post parallel from this pedestal protrusion and towards first plane with this common optical axis, the framework of described at least one lens group is outer to be provided with the rotation axis vertical with this common optical axis, and has the gear set that comprises cam on this rotation axis.When zoom lens was taken in, this cam and this protrusion post offseted, and made this lens group with this rotation axis upset and towards first plane motion.
According to zoom lens of the present invention, this zoom lens has more mirror group housing, combines with above-mentioned rotation axis, and when this zoom lens was taken in, this mirror group housing did not move rotationally towards this pedestal, and this cam and this protrusion post are offseted.
According to zoom lens of the present invention, this zoom lens has more elastic parts, when the said lens group turn to outside the common optical axis with the axle perpendicular to common optical axis, by this elastic parts storage elasticity potential energy.When this zoom lens was desired to carry out zoom operation, above-mentioned at least one lens group turn on the common optical axis by this elastic parts.Preferably, this elastic parts is the button spring, be arranged on the rotation axis and and offset with this mirror group housing, in this zoom lens take in and this at least one lens group with the upset of this rotation axis during towards first plane motion, this torsion spring storage elasticity potential energy, make when zoom lens carries out zoom operation, force above-mentioned at least one lens group to turn on the common optical axis.
According to zoom lens of the present invention, the revolving drum that this varifocal mirror comprises the stationary magazine creel that combines with this pedestal first watch, be arranged in this stationary magazine creel and move around this common optical axis rotation and along this common optical axis and be not arranged in this revolving drum rotationally and this common optical axis of edge moves directly advances tube.Wherein, said fixing tube inwall has first not parallel with this common optical axis cam path, and makes this revolving drum rotation and move by this first cam path; Above-mentioned revolving drum inwall has second not parallel with this common optical axis cam path; Above-mentionedly directly advance an inwall and have three cam path parallel with this common optical axis.
According to zoom lens of the present invention, this mirror group housing has more cam plug, simultaneously with second cam path and the engagement of the 3rd cam path, makes this mirror group housing not move rotationally along common optical axis between first plane and second plane.
According to zoom lens of the present invention, this varifocal mirror comprises motor first watch, and it drives this revolving drum rotation indirectly and moves.
According to zoom lens of the present invention, wherein after first planar inverted, its optical axis is vertical with this common optical axis around this rotation axis for this at least one lens group.
Compared with prior art, in the zoom lens of the present invention, at least one lens group can make less thick when zoom lens is taken in after first planar inverted; Reach compact effect, can obtain the slim zoom lens of characteristics such as low cost, low tolerance susceptibility, short length overall and high resolving power thus.。
Description of drawings
Figure 1A and Figure 1B show zoom lens of the present invention, are in the schematic diagram of zoom operation and receiving state respectively.
Fig. 2 summary shows the explosive view of the zoom lens of one embodiment of the present of invention.
Fig. 3 is the summary diagrammatic sketch towards second planar ends from first planar ends, and wherein the zoom lens of the embodiment of the invention only keeps pedestal, second lens group and aperture diaphragm.
Fig. 4 A be with Fig. 3 behind A-A ' section, observe the summary view that zoom lens is about to take in from B ' end towards the B end; Fig. 4 B be with Fig. 3 behind B '-B section, observe the summary view that zoom lens is about to take in from A ' end towards the A end; Fig. 4 C be with Fig. 3 behind A-A ' section, observe the summary view that zoom lens is about to take in from B end towards B ' end.
Fig. 5 A be with Fig. 3 behind A-A ' section, observe the summary view of zoom lens in taking in towards the B end from B ' end; Fig. 5 B be with Fig. 3 behind B '-B section, observe the summary view of zoom lens in taking in towards the A end from A ' end; Fig. 5 C be with Fig. 3 behind A-A ' section, observe the summary view of zoom lens in taking in towards B ' end from B end.
Fig. 6 A be with Fig. 3 behind A-A ' section, observe zoom lens from B ' end towards the B end and finish the summary view of taking in; Fig. 6 B be with Fig. 3 behind B '-B section, observe zoom lens from A ' end towards the A end and finish the summary view of taking in; Fig. 6 C be with Fig. 3 behind A-A ' section, observe zoom lens from B end towards B ' end and finish the summary view of taking in.
Embodiment
Figure 1A and Figure 1B show zoom lens of the present invention, are in the schematic diagram of zoom operation and receiving state respectively.Please refer to shown in Figure 1A and Figure 1B, this zoom lens has four lens groups, is first lens group 1, second lens group 2, aperture diaphragm S, the 3rd lens group 3 and the 4th lens group 4 in regular turn.When this zoom lens carried out zoom operation, these lens groups were positioned at a common light axle OA, and made one first plane P 1 and one second plane P 2 by this zoom lens conjugate plane each other.For example, when this zoom lens was used in a photographic means, first plane P 1 was that the thing end and second plane P 2 are the picture end; When this zoom lens was used in a projection arrangement, first plane P 1 was for amplifying the end and second plane P 2 for dwindling end.When this zoom lens carried out zoom operation, at least one lens group can move along common optical axis OA.
When zoom lens of the present invention is taken in, at least one lens group turn to outside the common optical axis with the axle perpendicular to common optical axis and towards first plane motion, at least one remaining lens group moves towards second plane from first plane with the direction that is parallel to common optical axis.Please refer to Figure 1A, the 3rd lens group 3 moves to earlier outside this common optical axis OA, then with after the axle upset perpendicular to common optical axis OA, moves towards first plane P 1 again.Perhaps, please refer to Figure 1B, the 3rd lens group 3 is directly with the axle upset perpendicular to common optical axis OA, and the while is towards 1 motion of first plane P.
Please refer to Figure 1A and Figure 1B, when zoom lens of the present invention is taken in, because the 3rd lens group 3 has turn to outside the common optical axis OA and towards first plane P 1 and has moved, the lens group 1 of winning, second lens group 2, aperture diaphragm S can be moved towards second plane P 2, and second lens group 2 and the 4th lens group 4 are adjoined.Therefore, zoom lens of the present invention can significantly reduce the thickness when taking in.
Though have four lens groups at the zoom lens shown in Figure 1A and Figure 1B, and the 3rd lens group is turning outside common optical axis; But other lens group except first lens group also can overturn.In other embodiments, the quantity of lens group also can be for example three, and this moment, second lens group was turning outside the common optical axis, below with reference to Fig. 2-6C this embodiment is described.
Fig. 2 summary shows the explosive view of the zoom lens of embodiments of the invention.Please refer to Fig. 2, this zoom lens comprises that the first lens group G1, the second lens group G2, the 3rd lens group G3, a pedestal 62, a stationary magazine creel 41, one first directly advance tube 30,1 first revolving drum 29, one second and directly advance tube 35 and 1 second revolving drum 34, and aperture diaphragm S is arranged between the first lens group G1 and the second lens group G2.The first lens group G1 comprises the first lens L1, the second lens L2, the 3rd lens L3 and the first lens group framework 19 again, and wherein the first lens L1, the second lens L2 and the 3rd lens L3 carry by the first lens group framework 19 and be fixed in wherein.Has one first cam plug 191 on the peripheral side wall of the first lens group framework 19.
The second lens group G2 comprises the 4th lens L4, the 5th lens L5, the second lens group framework 24, the second lens group outside framework 20, torsion spring 21 again, rotates a bolt axle 22 and a gear set 23.The 4th lens L4 and the 5th lens L5 carry by the second lens group framework 24 and are fixed in wherein.The second lens group framework 24 has pair of support arms 241a, b, and when this second lens group framework 24 carried out zoom operation, this was roughly parallel with common light axle OA to sway brace 241a, b.Have one second cam plug 201, an axis hole 202 and a fixed arm 203 on the peripheral side wall of the second lens group outside framework 20, rotate after bolt axle 22 passes this axis hole 202 and torsion spring 21, fix with a sway brace 241a wherein; In embodiments of the invention, another sway brace 241b also takes the mode identical with sway brace 241a to combine (not shown) with the second lens group outside framework 20, make the second lens group framework 24 to rotate bolt axle 22, overturn with axle perpendicular to common optical axis OA by this.Gear set 23 comprises one first fan type gear 231 and one second fan type gear 232, wherein the second fan type gear has more a cam 2321, and the first fan type gear 231 is fixed in sway brace 241b, and the second fan type gear 232 is arranged on the fixed arm 203 rotationally by a latch 2322, and makes win fan type gear 231 and 232 engagements of the second fan type gear.
The 3rd lens group G3 comprises the 6th lens L6 and first driver module 31 again, drives the 6th lens L6 by first driver module 31 and moves and focus along common optical axis OA.
Have the outstanding post 621 that extends in parallel with common light axle OA on the pedestal 62, and stationary magazine creel 41 combines with this pedestal 62.Take in the process at camera lens, cam 2321 butts of the outstanding post 621 and second sector gear 232 rotate second sector gear 232.This moment, first gear 232 with 232 engagements of second sector gear also rotated, and made the second lens group framework 24 of fixedlying connected with it deflect around rotating bolt axle 22, was turned to outside the common optical axis OA towards the direction by near the object end.
Torsion spring 21 installs mutually with the second lens group outside framework 20, takes in the process at camera lens, and the second lens group G2 turn to outside the common optical axis OA, and torsion spring 21 is compressed, thus the storage elasticity potential energy.When camera lens carried out zoom operation, the second lens group G2 was under the restoring force effect of torsion spring 21, and the position upset outside common optical axis OA is got back on the common optical axis OA.
Have first cam path 411 and with common light axle OA not parallel second cam path 412 parallel in the stationary magazine creel 41 with common light axle OA.The lateral wall root edge of the contiguous pedestal 62 of first revolving drum 29 has gear 291 on every side, and its madial wall has three cam path 292 and the four-cam groove 293 parallel with common light axle OA; In addition, the lateral wall root edge of the contiguous pedestal 62 of first revolving drum 29 has more the 3rd cam plug 294, and the 3rd cam plug 294 and 412 engagements of second cam path make the revolving drum 29 of winning rotate and move along common optical axis OA around common optical axis OA in stationary magazine creel 41.
First inwall that directly advances tube 30 has the 5th not parallel with common light axle OA cam path 301 and six cam path 302 parallel with common light axle OA.The first lateral wall root edge that directly advances tube 30 contiguous pedestals 62 has four-cam latch 303, and its lateral wall apical margin away from pedestal 62 has the 5th cam plug 304.After the 5th cam plug 304 and the engagement of the 3rd cam path 292 again with the engaging of first revolving drum 29 away from sidewall rim portion 295 within the pedestal 62; First cam path, 411 engagements in four-cam latch 303 and the stationary magazine creel 41.Therefore, when first revolving drum 29 in stationary magazine creel 41 when common optical axis OA rotates and moves along common optical axis OA, first revolving drum 29 drives first simultaneously and directly advances tube 30 and move along a common optical axis OA.
The inwall of second revolving drum 34 has the 7th not parallel with common light axle OA cam path 345 and the 8th cam path 346; The lateral wall root edge of second revolving drum, 34 contiguous pedestals 62 has the 6th cam plug 341.The 5th cam path 301 is grooves, make the 6th cam plug 341 pass the 5th cam path 301 and with four-cam groove 293 engagement.Therefore, when first revolving drum 29 during, drive second revolving drum 34 simultaneously and rotate around common optical axis OA around common optical axis OA rotation.
Second inwall that directly advances tube 35 has nine cam path 353 parallel with common light axle OA and the tenth cam path 354; The second lateral wall root edge that directly advances tube 35 contiguous pedestals 62 has the 7th cam plug 352.The 7th cam plug 352 and the engagement of the 6th cam path 302 make when first directly advances tube 30 and move along a common optical axis OA, can drive second and directly advance tube 35 and move along an optical axis OA jointly.
The 9th cam path 353 is grooves, make first cam plug 191 of the lens group framework 19 of winning pass the 9th cam path 353 and with 345 engagements of the 7th cam path; The tenth cam path 354 is grooves, make second cam plug 201 of the second lens group outside framework 20 pass the tenth cam path 354 and with 346 engagements of the 8th cam path.
When this zoom lens carried out zoom operation, first revolving drum 29 drove second revolving drum 34 and rotates around common optical axis OA, and moved along common optical axis OA by first cam plug 191, the 9th cam path 353 and the 7th cam path 345 drives first lens group G1; Move along common optical axis OA in addition, and by second cam plug 201, the tenth cam path 354 and the 8th cam path 346 drives second lens group G2.
Second driver module 50 is arranged on the periphery wall of stationary magazine creel 41, and meshes with gear around first revolving drum 29 291, when zoom lens carries out zoom operation, utilizes second driver module 50 to drive first revolving drum 29 and rotates around common optical axis OA.Second driver module 50 can be a motor for example.
Fig. 3 is the summary diagrammatic sketch towards second planar ends from first planar ends, and wherein the zoom lens of the embodiment of the invention only keeps pedestal 62, the second lens group G2 and aperture diaphragm S.
Fig. 4 A be with Fig. 3 behind A-A ' section, observe the summary view that zoom lens is about to take in from B ' end towards the B end; Fig. 4 B be with Fig. 3 behind B '-B section, observe the summary view that zoom lens is about to take in from A ' end towards the A end; Fig. 4 C be with Fig. 3 behind A-A ' section, observe the summary view that zoom lens is about to take in from B end towards B ' end.With reference to Fig. 4 A to Fig. 4 C, when the zoom lens of the embodiment of the invention will be taken in, the cam 2321 of the second fan type gear 232 of gear set 23 connected just with the outstanding post 621 of pedestal 62.
Fig. 5 A be with Fig. 3 behind A-A ' section, observe the summary view of zoom lens in taking in towards the B end from B ' end; Fig. 5 B be with Fig. 3 behind B '-B section, observe the summary view of zoom lens in taking in towards the A end from A ' end; Fig. 5 C be with Fig. 3 behind A-A ' section, observe the summary view of zoom lens in taking in towards B ' end from B end.With reference to Fig. 5 A to Fig. 5 C, when the zoom lens of the embodiment of the invention was taken in, the cam 2321 of the second fan type gear 232 of gear set 23 connected with the outstanding post 621 of pedestal 62 and makes the second fan type gear 232 drive the second lens group framework 24 and overturns towards the direction on first plane around rotating bolt axle 22.
Fig. 6 A be with Fig. 3 behind A-A ' section, observe zoom lens from B ' end towards the B end and finish the summary view of taking in; Fig. 6 B be with Fig. 3 behind B '-B section, observe zoom lens from A ' end towards the A end and finish the summary view of taking in; Fig. 6 C be with Fig. 3 behind A-A ' section, observe zoom lens from B end towards B ' end and finish the summary view of taking in.With reference to Fig. 6 A to Fig. 6 C, to finish when taking in when the zoom lens of the embodiment of the invention, the second lens group framework 24 has turn to outside the common optical axis; Wherein the axis of the second lens group framework 24 is roughly vertical with the common light axle.
In sum, the present invention has really met the important document of patent of invention, and the whence proposes patented claim in accordance with the law.But the above person only is a better embodiment of the present invention, and the personage who has the knack of this case technology such as helps the equivalence of doing according to spirit of the present invention and modifies or variation, all is covered by in the scope of claim.
Claims (10)
1. zoom lens, this zoom lens comprises plural lens group, it is characterized in that, when this zoom lens carries out zoom operation, the plural number lens group is positioned at a common light axle, and make one first plane and one second plane by this zoom lens conjugate plane each other, when this zoom lens is taken in, at least one lens group turn to outside the common optical axis and towards first plane motion with the axle perpendicular to common optical axis, and at least one remaining lens group moves towards second plane from first plane with the direction that is parallel to common optical axis.
2. zoom lens as claimed in claim 1 is characterized in that, described at least one lens group is the arbitrary lens group except that the lens group on the most close described first plane.
3. zoom lens as claimed in claim 1 is characterized in that, further comprises:
Pedestal, contiguous second plane is provided with, and it has from this pedestal protrusion and towards extension of first plane and the outstanding post parallel with this common optical axis;
The framework of above-mentioned at least one lens group of carrying;
Rotation axis is arranged at movably on the said frame and with this common optical axis and vertically rotates; And
Gear set is arranged on the above-mentioned rotation axis and has cam, and when this zoom lens is taken in, this cam with should offset by outstanding post, make this at least one lens group with this rotation axis upset and towards first plane motion.
4. zoom lens as claimed in claim 3 is characterized in that, more comprises:
Elastic parts is arranged on this rotation axis, when this zoom lens carries out zoom operation, this at least one lens group is turn on the common optical axis.
5. zoom lens as claimed in claim 4 is characterized in that, more comprises:
Mirror group housing combines with above-mentioned rotation axis, and when this zoom lens was taken in, this mirror group housing did not move rotationally towards this pedestal, and drives this cam and should offset by outstanding post.
6. zoom lens as claimed in claim 5 is characterized in that this elastic parts is a torsion spring, and offsets with this mirror group housing.
7. zoom lens as claimed in claim 5 is characterized in that, more comprises:
Stationary magazine creel combines with this pedestal, and its inwall has first not parallel with this common optical axis cam path;
Revolving drum is arranged in this stationary magazine creel, and moves around this common optical axis rotation and along this common optical axis by this first cam path, and its inwall has second not parallel with this common optical axis cam path;
Directly advance tube, be not arranged at rotationally in this revolving drum, drive this by this revolving drum and directly advance tube and move along this common optical axis, and its barrel has three cam path parallel with this common optical axis.
8. zoom lens as claimed in claim 7 is characterized in that, this mirror group housing has cam plug, with second cam path and the engagement of the 3rd cam path, makes this mirror group housing not move rotationally between first plane and second plane simultaneously.
9. zoom lens as claimed in claim 7 is characterized in that, more comprises motor, drives this revolving drum rotation and moves.
10. zoom lens as claimed in claim 1, wherein after this at least one lens group upset, its optical axis is vertical with this common optical axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100967616A CN101571623B (en) | 2008-05-04 | 2008-05-04 | Zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100967616A CN101571623B (en) | 2008-05-04 | 2008-05-04 | Zoom lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101571623A CN101571623A (en) | 2009-11-04 |
| CN101571623B true CN101571623B (en) | 2011-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100967616A Active CN101571623B (en) | 2008-05-04 | 2008-05-04 | Zoom lens |
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| Country | Link |
|---|---|
| CN (1) | CN101571623B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8520328B2 (en) | 2010-02-05 | 2013-08-27 | Canon Kabushiki Kaisha | Lens barrel and imaging apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4887107A (en) * | 1986-07-29 | 1989-12-12 | Minolta Camera Kabushiki Kaisha | Camera |
| CN1439929A (en) * | 2002-02-21 | 2003-09-03 | 宾得株式会社 | Telescopic lens system and method for the same system |
| CN1731270A (en) * | 2005-08-24 | 2006-02-08 | 亚洲光学股份有限公司 | Reversibly contained lens module |
| CN1731264A (en) * | 2005-08-31 | 2006-02-08 | 亚洲光学股份有限公司 | Telescopic lens system and reversible lens accommodating mechanism |
-
2008
- 2008-05-04 CN CN2008100967616A patent/CN101571623B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4887107A (en) * | 1986-07-29 | 1989-12-12 | Minolta Camera Kabushiki Kaisha | Camera |
| CN1439929A (en) * | 2002-02-21 | 2003-09-03 | 宾得株式会社 | Telescopic lens system and method for the same system |
| CN1731270A (en) * | 2005-08-24 | 2006-02-08 | 亚洲光学股份有限公司 | Reversibly contained lens module |
| CN1731264A (en) * | 2005-08-31 | 2006-02-08 | 亚洲光学股份有限公司 | Telescopic lens system and reversible lens accommodating mechanism |
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| Publication number | Publication date |
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| CN101571623A (en) | 2009-11-04 |
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