CN109061840B - Low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens and imaging method thereof - Google Patents
Low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens and imaging method thereof Download PDFInfo
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- CN109061840B CN109061840B CN201811224675.9A CN201811224675A CN109061840B CN 109061840 B CN109061840 B CN 109061840B CN 201811224675 A CN201811224675 A CN 201811224675A CN 109061840 B CN109061840 B CN 109061840B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 238000001228 spectrum Methods 0.000 title claims abstract description 19
- 238000003384 imaging method Methods 0.000 title claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 125000005647 linker group Chemical group 0.000 claims description 10
- 238000004026 adhesive bonding Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 description 9
- 238000003825 pressing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
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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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
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- Optics & Photonics (AREA)
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Abstract
The invention relates to a low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens, which comprises a front lens group A, an iris diaphragm B, a rear lens group C and a color filter D, wherein the front lens group A, the iris diaphragm B, the rear lens group C and the color filter D are sequentially arranged along the incidence direction of light rays from left to right; the front lens group A comprises a positive crescent lens A-1, a negative crescent lens A-2, a negative crescent lens A-3, a biconvex lens A-4, a biconcave lens A-5, a positive crescent lens A-6 and a biconvex lens A-7 which are sequentially arranged along the incidence direction of light rays from left to right, and the rear lens group C comprises a biconvex lens C-1, a biconcave lens C-2, a biconvex lens C-3 and a biconvex lens C-4 which are sequentially arranged along the incidence direction of light rays from left to right; the invention also relates to an imaging method of the low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens. The invention uses eleven full spherical lenses, has compact optical structure, full view angle of more than 84 degrees, distortion of less than 2 percent, high optical resolution, good imaging of visible light and near infrared wave bands, and is suitable for large-scale monitoring of offshore airlines, and the high-definition camera is matched with a 1200 ten-thousand-pixel high-definition camera.
Description
Technical Field
The invention relates to a low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens and an imaging method thereof.
Background
The photographic lens with the focal length shorter than the standard lens and the visual angle larger than the standard lens is generally called a wide-angle lens, can shoot scenes with larger area due to the characteristic of a large visual field, is widely applied to the fields of vehicle-mounted, security monitoring and the like, and has the defects of large distortion, poor image quality of the image surface edge, serious image deformation distortion, low resolution, large volume and the like due to the short focal length and the large visual field. In order to solve the defects, the existing lens generally adopts a mode of mixing a plurality of aspherical surfaces or glass plastic and aspherical surfaces, but the aspherical surfaces of the lens are difficult to process and have high cost.
Disclosure of Invention
In view of the defects of the prior art, the technical problem to be solved by the invention is to provide the low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens and the imaging method thereof, which are reasonable in structural design, efficient and convenient.
In order to solve the technical problems, the technical scheme of the invention is as follows: a low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens comprises a front lens group A, an iris diaphragm B, a rear lens group C and a color filter D, wherein the front lens group A, the iris diaphragm B, the rear lens group C and the color filter D are sequentially arranged along the incidence direction of light rays from left to right; the front lens group A comprises a positive crescent lens A-1, a negative crescent lens A-2, a negative crescent lens A-3, a biconvex lens A-4, a biconcave lens A-5, a positive crescent lens A-6 and a biconvex lens A-7 which are sequentially arranged along the incidence direction of light rays from left to right, and the rear lens group C comprises a biconvex lens C-1, a biconcave lens C-2, a biconvex lens C-3 and a biconvex lens C-4 which are sequentially arranged along the incidence direction of light rays from left to right.
Further, the biconvex lens A-4 is closely connected with the biconcave lens A-5 to form a first bonding group, and the biconvex lens C-1 is closely connected with the biconcave lens C-2 to form a second bonding group.
Further, the air space between the front lens group A and the iris diaphragm B is 1.24mm, and the air space between the iris diaphragm B and the rear lens group C is 1.95mm.
Further, the air interval between the positive crescent lens A-1 and the negative crescent lens A-2 is 0.15mm, the air interval between the negative crescent lens A-2 and the negative crescent lens A-3 is 6.17mm, the air interval between the negative crescent lens A-3 and the first bonding group is 2.43mm, the air interval between the first bonding group and the positive crescent lens A-6 is 1.00mm, and the air interval between the positive crescent lens A-6 and the biconvex lens A-7 is 2.71mm; the air space between the second glue group and the lenticular lens C-3 is 1.14mm, and the air space between the lenticular lens C-3 and the lenticular lens C-4 is 9.04mm.
Further, the focal length f' =13 mm, the relative aperture is 1/2.8, the angle of view is more than 84 °, and the distortion is less than 2% of the optical system composed of the front lens group a, the iris B, the rear lens group C and the color filter D.
An imaging method of a low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens, comprising any one of the low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens, comprising the following steps: the light enters the front lens group A, the iris B, the rear lens group C and the color filter D in sequence from left to right for imaging.
Compared with the prior art, the invention has the following beneficial effects: the invention uses eleven full spherical lenses, has compact optical structure, full view angle of more than 84 degrees, distortion of less than 2 percent, high optical resolution, good imaging of visible light and near infrared wave bands, and is suitable for large-scale monitoring of offshore airlines, and the high-definition camera is matched with a 1200 ten-thousand-pixel high-definition camera.
The invention will be described in further detail with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a schematic diagram of an optical system according to an embodiment of the present invention.
Fig. 2 is a graph of the MTF of visible light according to an embodiment of the present invention.
Fig. 3 is a near infrared MTF plot of an embodiment of the present invention.
Fig. 4 is a graph of distortion curves for an embodiment of the present invention.
Fig. 5 is a schematic diagram of the overall construction of an embodiment of the present invention.
Fig. 6 is a schematic view of the structure of the electric diaphragm mechanism according to the embodiment of the present invention.
Fig. 7 is a schematic view of the structure of the electric diaphragm mechanism according to the embodiment of the present invention.
Fig. 8 is a schematic diagram of the construction of the electric color filter switching mechanism according to the embodiment of the present invention.
Fig. 9 is a schematic configuration diagram of an electric color filter switching mechanism according to an embodiment of the present invention.
In the figure:
a-front lens group A, A1-positive crescent lens A-1, A2-negative crescent lens A-2, A3-negative crescent lens A-3, A4-biconvex lens A-4, A5-biconcave lens A-5, A6-positive crescent lens A-6, A7-biconvex lens A-7;
b-an iris diaphragm B,
c-rear lens group C, C1-biconvex lens C-1, C2-biconcave lens C-2, C3-biconvex lens C-3, C4-biconvex lens C-4;
a D-color filter D;
1-front inner lens seat, 2-front outer lens seat, 3-rear lens seat, 4-first clamping ring, 5-first spacing ring, 6-second spacing ring, 7-third spacing ring, 8-second clamping ring, 9-fourth spacing ring, 10-fifth spacing ring, 11-third clamping ring, 12-electric diaphragm mechanism, 13-high definition camera, 14-connection bottom plate, 15-diaphragm moving ring, 16-diaphragm moving ring clamping ring, 17-diaphragm adjusting ring, 18-diaphragm adjusting ring clamping ring, 19-micro switch, 20-diaphragm sheet, 21-diaphragm motor, 22-diaphragm motor gear, 23-diaphragm passing wheel, 24-potentiometer, 25-potentiometer gear, 26-color filter switching motor frame, 27-color filter switching passing wheel, 28-turntable, 29-Hall element, 30-color filter switching motor, 31-color filter switching motor gear.
Detailed Description
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1 to 9, the low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens comprises a front lens group a, an iris diaphragm B, a rear lens group C and a color filter D which are sequentially arranged along the incident direction of light from left to right; the front lens group A comprises a positive crescent lens A-1, a negative crescent lens A-2, a negative crescent lens A-3, a biconvex lens A-4, a biconcave lens A-5, a positive crescent lens A-6 and a biconvex lens A-7 which are sequentially arranged along the incidence direction of light rays from left to right, and the rear lens group C comprises a biconvex lens C-1, a biconcave lens C-2, a biconvex lens C-3 and a biconvex lens C-4 which are sequentially arranged along the incidence direction of light rays from left to right.
In the embodiment of the invention, the biconvex lens A-4 and the biconcave lens A-5 are closely connected to form a first gluing group, and the biconvex lens C-1 and the biconcave lens C-2 are closely connected to form a second gluing group.
In the embodiment of the invention, the air space between the front lens group A and the iris diaphragm B is 1.24mm, and the air space between the iris diaphragm B and the rear lens group C is 1.95mm.
In the embodiment of the invention, the air interval between the positive crescent lens A-1 and the negative crescent lens A-2 is 0.15mm, the air interval between the negative crescent lens A-2 and the negative crescent lens A-3 is 6.17mm, the air interval between the negative crescent lens A-3 and the first bonding group is 2.43mm, the air interval between the first bonding group and the positive crescent lens A-6 is 1.00mm, and the air interval between the positive crescent lens A-6 and the biconvex lens A-7 is 2.71mm; the air space between the second glue group and the lenticular lens C-3 is 1.14mm, and the air space between the lenticular lens C-3 and the lenticular lens C-4 is 9.04mm.
In the embodiment of the invention, the focal length f' =13 mm of the optical system formed by the front lens group A, the iris diaphragm B, the rear lens group C and the color filter D, the relative aperture is 1/2.8, the angle of view is more than 84 degrees, the distortion is less than 2 percent, and the optical system is suitable for a high-definition camera with 1200 ten thousand pixels.
In the present embodiment, each lens is required to meet the parameter requirements shown in table 1.
In the embodiment of the invention, the front surface of the orthodontic lens A-1 is plated with the anti-corrosion film layer, so that the orthodontic lens A-1 can adapt to the sea surface high salinity environment for a long time.
In the embodiment of the invention, the low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens further comprises a lens frame used for fixing a front lens group A, an iris diaphragm B, a rear lens group C and a color filter D, wherein the lens frame comprises a front inner lens seat, a front outer lens seat and a rear lens seat, a front section of the front outer lens seat is internally provided with a positive crescent lens A-1, and the positive crescent lens A-1 is locked by a first clamping ring; the front inner lens seat is nested and arranged in the rear section of the front outer lens seat; the front endoscope seat is internally and sequentially provided with a negative crescent lens A-2, a negative crescent lens A-3, a first spacing ring, a first gluing group formed by closely connecting a biconvex lens A-4 and a biconcave lens A-5, a second spacing ring, an orthodontics lens A-6, a third spacing ring 3 and a biconvex lens A-7, and is locked by a second pressing ring; the front inner lens seat and the front outer lens seat control dimensional tolerance, the air interval between the positive crescent lens A-1 and the negative crescent lens A-2 is guaranteed to be 0.15mm, the negative crescent lens A-2 and the negative crescent lens A-3 control dimensional tolerance, the air interval between the negative crescent lens A-2 and the negative crescent lens A-3 is guaranteed to be 6.17mm, the first spacer ring control dimensional tolerance, the air interval between the negative crescent lens A-3 and the first bonding group is guaranteed to be 2.43mm, the second spacer ring control dimensional tolerance, the air interval between the first bonding group and the positive crescent lens A-6 is guaranteed to be 1.00mm, and the third spacer ring control dimensional tolerance, the air interval between the positive crescent lens A-6 and the biconvex lens A-7 is guaranteed to be 2.71mm; the inside of the rear mirror seat is sequentially provided with a biconvex lens C-1, a biconcave lens C-2, a fourth space ring, a biconvex lens C-3, a fifth space ring and a biconvex lens C-4, and is locked by a third pressing ring; the fourth space ring controls the dimensional tolerance, so that the air interval between the second gluing group formed by closely connecting the lens C1 and the lens C2 and the biconvex lens C-3 is 1.14mm, and the fifth space ring controls the dimensional tolerance, so that the air interval between the biconvex lens C-3 and the biconvex lens C-4 is 9.04mm.
In the embodiment of the invention, the low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens further comprises an electric diaphragm mechanism, wherein the electric diaphragm mechanism comprises a diaphragm moving ring, a diaphragm moving ring pressing ring, a diaphragm adjusting ring pressing ring, a diaphragm motor frame and a micro switch, a diaphragm sheet is assembled in the diaphragm moving ring, one end of the diaphragm sheet is assembled in a front outer lens seat hole, and the other end of the diaphragm sheet is assembled in a diaphragm moving ring groove; the diaphragm motor frame is rigidly connected with the rear mirror base through two M3 inner hexagon screws; the diaphragm motor frame is provided with a diaphragm motor, a diaphragm motor gear, a diaphragm idler wheel, a potentiometer and a potentiometer gear; the diaphragm motor is rigidly connected with a gear of the diaphragm motor, the gear of the diaphragm motor is precisely meshed with the carrier wheel, the potentiometer is rigidly connected with the gear of the potentiometer, and the gear of the potentiometer is precisely meshed with the carrier wheel; the diaphragm adjusting ring is connected with the diaphragm moving ring through guide nails, and is limited through a micro switch when the diaphragm adjusting ring rotates in place.
In the embodiment of the invention, the low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens further comprises an electric color filter switching mechanism, wherein the electric color filter switching mechanism comprises a color filter switching motor frame, a color filter switching wheel, a rotary table and a Hall element, the color filter switching motor frame is rigidly connected with a rear lens seat through two M3 inner hexagon screws, a color filter switching motor and a color filter switching motor gear are arranged on the color filter switching motor frame, the color filter switching motor gear is rigidly connected with the color filter switching motor, the color filter switching motor gear is precisely meshed with the wheel, the transition wheel is precisely meshed with the rotary table, four color filters with different specifications are assembled in the rotary table and locked by using color filter pressing rings, the rotary table rotates to realize the switching function among different color filters, such as a visible light color filter and a near infrared color filter, confocal clear imaging of different thicknesses and film systems is realized through the color filter switching of different film systems, and when the color filter rotating disc rotates to a position, the color filter rotating disc is limited through the Hall element.
In the embodiment of the invention, an imaging method of the low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens comprises the steps of: the light enters the front lens group A, the iris B, the rear lens group C and the color filter D in sequence from left to right for imaging.
Terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape are meant to include a state or shape that is similar, analogous or approaching thereto, unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (4)
1. A low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens is characterized in that: the light source comprises a front lens group A, an iris diaphragm B, a rear lens group C and a color filter D which are sequentially arranged along the incident direction of light rays from left to right; the front lens group A consists of a positive crescent lens A-1, a negative crescent lens A-2, a negative crescent lens A-3, a biconvex lens A-4, a biconcave lens A-5, a positive crescent lens A-6 and a biconvex lens A-7 which are sequentially arranged along the incidence direction of light rays from left to right, and the rear lens group C consists of a biconvex lens C-1, a biconcave lens C-2, a biconvex lens C-3 and a biconvex lens C-4 which are sequentially arranged along the incidence direction of light rays from left to right;
the biconvex lens A-4 is closely connected with the biconcave lens A-5 to form a first gluing group, and the biconvex lens C-1 is closely connected with the biconcave lens C-2 to form a second gluing group;
the optical system composed of the front lens group A, the iris diaphragm B, the rear lens group C and the color filter D has focal length f' =13 mm, the relative aperture is 1/2.8, the angle of view is more than 84 degrees, the distortion is less than 2 percent, and the optical system is suitable for a high-definition camera with 1200 ten thousand pixels.
2. The low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens as claimed in claim 1, wherein: the air interval between the front lens group A and the iris diaphragm B is 1.24mm, and the air interval between the iris diaphragm B and the rear lens group C is 1.95mm.
3. The low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens as claimed in claim 1, wherein: the air interval between the positive crescent lens A-1 and the negative crescent lens A-2 is 0.15mm, the air interval between the negative crescent lens A-2 and the negative crescent lens A-3 is 6.17mm, the air interval between the negative crescent lens A-3 and the first bonding group is 2.43mm, the air interval between the first bonding group and the positive crescent lens A-6 is 1.00mm, and the air interval between the positive crescent lens A-6 and the biconvex lens A-7 is 2.71mm; the air space between the second glue group and the lenticular lens C-3 is 1.14mm, and the air space between the lenticular lens C-3 and the lenticular lens C-4 is 9.04mm.
4. An imaging method of a low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens is characterized by comprising the following steps of: the low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens as set forth in any one of claims 1 to 3, comprising the following steps: the light enters the front lens group A, the iris B, the rear lens group C and the color filter D in sequence from left to right for imaging.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811224675.9A CN109061840B (en) | 2018-10-19 | 2018-10-19 | Low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens and imaging method thereof |
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| CN201811224675.9A CN109061840B (en) | 2018-10-19 | 2018-10-19 | Low-distortion wide-spectrum high-definition wide-angle aerial photographing monitoring lens and imaging method thereof |
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| CN109061840B true CN109061840B (en) | 2023-12-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110261978A (en) * | 2019-07-09 | 2019-09-20 | 福建福光天瞳光学有限公司 | A kind of low industrial camera lens and its working method of distorting of high definition |
| CN110412745B (en) * | 2019-07-31 | 2023-09-19 | 福建福光天瞳光学有限公司 | 1.1-inch target surface f12mm high-definition low-distortion industrial lens and manufacturing method thereof |
| CN110568584B (en) * | 2019-08-28 | 2020-08-11 | 浙江大学 | 4K high-resolution panoramic annular belt optical system |
| CN114994863B (en) * | 2022-04-28 | 2023-05-09 | 福建福光股份有限公司 | Compact large-breadth large-aperture lens and imaging method thereof |
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| CN101806952A (en) * | 2010-03-10 | 2010-08-18 | 中国科学院光电技术研究所 | Active temperature/pressure-compensating real-time transmission type aerophotographic camera lens |
| CN104199174A (en) * | 2014-09-18 | 2014-12-10 | 福建福光数码科技有限公司 | Day and night confocal high-definition lens with large target area |
| CN104238096A (en) * | 2014-05-21 | 2014-12-24 | 苏州莱能士光电科技有限公司 | Large-zoom megapixel high-definition optical system |
| KR20170053046A (en) * | 2015-11-05 | 2017-05-15 | 주식회사 삼양옵틱스 | Lens system and optical comprising the same |
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2018
- 2018-10-19 CN CN201811224675.9A patent/CN109061840B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806952A (en) * | 2010-03-10 | 2010-08-18 | 中国科学院光电技术研究所 | Active temperature/pressure-compensating real-time transmission type aerophotographic camera lens |
| CN104238096A (en) * | 2014-05-21 | 2014-12-24 | 苏州莱能士光电科技有限公司 | Large-zoom megapixel high-definition optical system |
| CN104199174A (en) * | 2014-09-18 | 2014-12-10 | 福建福光数码科技有限公司 | Day and night confocal high-definition lens with large target area |
| KR20170053046A (en) * | 2015-11-05 | 2017-05-15 | 주식회사 삼양옵틱스 | Lens system and optical comprising the same |
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