CN108196325B - Device and method for improving stray light absorption energy density of laser system - Google Patents
Device and method for improving stray light absorption energy density of laser system Download PDFInfo
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- CN108196325B CN108196325B CN201810192861.2A CN201810192861A CN108196325B CN 108196325 B CN108196325 B CN 108196325B CN 201810192861 A CN201810192861 A CN 201810192861A CN 108196325 B CN108196325 B CN 108196325B
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Abstract
The invention relates to a device and a method for improving stray light absorption energy density of a laser system, which belong to the technical field of high-power laser, and comprise a base, transparent fused quartz glass absorption sheets and black neutral glass absorption sheets, wherein the transparent fused quartz glass absorption sheets and the black neutral glass absorption sheets are obliquely arranged in the base and are provided with a plurality of transparent fused quartz glass absorption sheets and black neutral glass absorption sheets 2 The above.
Description
Technical Field
The invention belongs to the technical field of high-power laser, and particularly relates to a device and a method for improving stray light absorption energy density of a laser system.
Background
In a relatively complex high-power laser optical system, besides main laser, a large amount of stray light exists in the system, and in order to ensure the safety of a large number of optical elements in the high-power laser optical system, the stray light needs to be controlled and absorbed. Wherein stray light with lower energy density can be directly absorbed by the surface of the metal structure, and the energy density reaches 100mJ/cm 2 The stray light of (2) is absorbed by a special absorbing device, and black neutral glass is generally adopted as an absorbing material.
The energy density of high power laser which can be tolerated by the black neutral glass is only less than or equal to 2J/cm by adopting a direct absorption mode of the black neutral glass 2 Is incident on the substrate. In the practical application process, the stray light receiving area is increased by tilting the black neutral glass sheet, so that the energy density of stray light absorption can be improved to be less than or equal to 10J/cm 2 . In the existing stray light absorbing device and method, no device capable of improving the stray light absorbing energy density to 50J/cm exists 2 The above apparatus and method.
Disclosure of Invention
In order to overcome the defects in the prior art, the inventor combines the transparent fused silica glass absorption sheet with the black neutral glass absorption sheet, and fully utilizes the characteristics of high temperature resistance and low thermal expansion coefficient of the transparent fused silica glass absorption sheet and the black neutral glass absorptionThe characteristic of high absorption rate of the sheet realizes the graded and repeated absorption of stray light and improves the stray light absorption energy density of a laser system to 50J/cm 2 The above.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the device for improving the stray light absorption energy density of the laser system comprises a base, a transparent fused quartz glass absorption sheet and a black neutral glass absorption sheet, wherein the transparent fused quartz glass absorption sheet and the black neutral glass absorption sheet are obliquely arranged in the base and are provided with a plurality of transparent fused quartz glass absorption sheets and black neutral glass absorption sheets;
the transparent fused silica glass absorption sheets are connected end to end, the included angles of the transparent fused silica glass absorption sheets and the bottom surface of the base are equal, the included angle between two adjacent transparent fused silica glass absorption sheets is alpha, and alpha is less than 36 degrees;
the number of the black neutral glass absorbing sheets is the same as that of the transparent fused quartz glass absorbing sheets, the black neutral glass absorbing sheets and the transparent fused quartz glass absorbing sheets are arranged in one-to-one correspondence, the black neutral glass absorbing sheets are positioned between the transparent fused quartz glass absorbing sheets and the base, gaps are reserved between the black neutral glass absorbing sheets and the transparent fused quartz glass absorbing sheets, and an included angle between the black neutral glass absorbing sheets and the bottom surface of the base is beta, and beta is more than 72 degrees.
Further, the number of the transparent fused silica glass absorbing sheets and the number of the black neutral glass absorbing sheets are both even.
Further, the transparent fused silica glass absorption sheet has a double-sided parallel structure.
Further, the black neutral glass absorbing sheet is of a double-sided parallel structure, and the type of the black neutral glass absorbing sheet is matched with the wavelength of stray light.
In addition, the invention also provides a use method of the device for improving the stray light absorption energy density of the laser system, which comprises the following steps:
s1: mounting a transparent fused silica glass absorption sheet and a black neutral glass absorption sheet into the base;
s2: if the polarization state of the stray light is S polarization, executing a step S3; if the polarization state of the stray light is P polarization, adjusting the position of the base, and then executing the step S3;
s3: determining an incidence angle of the stray light incident on the transparent fused quartz glass absorption sheet, and further adjusting the position of the base according to the incidence angle;
s4: the stray light is incident to the transparent fused silica glass absorption sheet to generate a primary transmission light beam and a primary reflection light beam, the transparent fused silica glass absorption sheet is marked as an initial transparent fused silica glass absorption sheet, and the primary transmission light beam is directly absorbed by the black neutral glass absorption sheet;
s5: the primary reflection light beam is incident to an adjacent transparent fused quartz glass absorption sheet to generate a secondary transmission light beam and a secondary reflection light beam, and the secondary transmission light beam is directly absorbed by a black neutral glass absorption sheet;
s6: and repeating the steps S4-S5 until the N-1 times of reflected light beams vertically enter the adjacent transparent fused silica absorption sheets.
Further, in the step S3, the intensity of the S polarized stray light is a ⊥ The intensity of the S polarized stray light of primary reflection is R ⊥ The intensity of the S polarized stray light transmitted once is T ⊥ Refractive index n of air to stray light 1 The refractive index of the transparent fused silica absorption sheet to stray light is n 2 The incidence angle of the stray light incident on the transparent fused silica glass absorption sheet is theta 1 A transmission angle of theta 2 The emergent angle is theta 3 Wherein θ 1 ＝θ 3 Then:
Then, reflectance of stray light intensity:
transmittance of stray light intensity: />
Further, in the step S3, an incident angle θ at which the stray light is incident on the transparent fused silica glass absorption sheet 1 The determining method comprises the following steps: order the
Obtaining theta 1 And (3) obtaining the product.
Further, in the step S2, when the polarization state of the stray light is P-polarized, the base is rotated by 90 ° around the z-axis, so that the polarization state of the stray light incident into the transparent fused silica glass absorbing sheet is S-polarized.
Further, the reflection times of the stray light between the adjacent transparent fused quartz glass absorption sheets are more than 3 times, and N is more than or equal to 4.
The beneficial effects of the invention are as follows:
the transparent fused silica glass absorption sheet and the black neutral glass absorption sheet are combined, on the premise that the transmittance of stray light intensity is lower than 10% of the stray light intensity, the incident angle of the stray light incident to the transparent fused silica glass absorption sheet is optimized, meanwhile, the installation angle of the transparent fused silica glass absorption sheet is optimized, the stray light is promoted to be reflected for more than 3 times between the adjacent transparent fused silica glass absorption sheets, the stray light is graded and absorbed for multiple times, the limitation of high-power laser energy density which can be tolerated by the black neutral glass absorption sheet is effectively avoided, and the stray light absorption energy density of a laser system is improved to 50J/cm 2 The above.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic diagram of the optical principle of the present invention.
In the accompanying drawings: 1-transparent fused silica glass absorption sheet, 2-black neutral glass absorption sheet, 3-base, included angle between two adjacent transparent fused silica glass absorption sheets, included angle between beta-black neutral glass absorption sheet and base bottom surface.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, and based on the embodiments in the present application, other similar embodiments obtained by those skilled in the art without making creative efforts should fall within the scope of protection of the present application. In addition, directional words such as "upper", "lower", "left", "right", and the like, as used in the following embodiments are merely directions with reference to the drawings, and thus, the directional words used are intended to illustrate, not to limit, the invention.
Embodiment one:
as shown in fig. 1, a device for improving the stray light absorption energy density of a laser system comprises a base 3, a transparent fused silica glass absorption sheet 1 and a black neutral glass absorption sheet 2, wherein the transparent fused silica glass absorption sheet 1 is used for carrying out multiple reflection and transmission on stray light, the black neutral glass absorption sheet 2 is used for absorbing the stray light transmitted through the transparent fused silica glass absorption sheet 1, and a cavity is formed in the base 3 and also has the function of absorbing the stray light. The transparent fused silica glass absorption sheet 1 and the black neutral glass absorption sheet 2 are obliquely arranged in the base 3, and a plurality of transparent fused silica glass absorption sheets and black neutral glass absorption sheets are arranged. Meanwhile, the transparent fused silica glass absorption sheets 1 are connected end to end, and the included angles of the transparent fused silica glass absorption sheets 1 and the bottom surface of the base 3 are equal, that is, two adjacent transparent fused silica glass absorption sheets 1 form a positive V shape or an inverted V shape.
As shown in fig. 1-2, the included angle between two adjacent transparent fused silica glass absorption sheets 1 is alpha, and the reflection angle of the primary reflection beam is alpha 1 The reflection angle of the secondary reflection beam is alpha 2 The reflection angle of the tertiary reflected beam is alpha 3 And: alpha 1 ＝90°-α/2，α 2 ＝90°-3α/2，α 3 To ensure that stray light is reflected more than 3 times between two adjacent transparent fused silica glass absorption sheets 1, let alpha be 3 >0, finding alpha<36 °, that is to say that the angle between two adjacent transparent fused silica glass absorption sheets 1 is less than 36 °.
The number of the black neutral glass absorbing sheets 2 is the same as that of the transparent fused silica glass absorbing sheets 1, and the black neutral glass absorbing sheets 2 and the transparent fused silica glass absorbing sheets 1 are arranged in a one-to-one correspondence manner, and meanwhile, in order to achieve the purpose that stray light is reflected between two adjacent transparent fused silica glass absorbing sheets 1, the number of the black neutral glass absorbing sheets 2 and the transparent fused silica glass absorbing sheets 1 is even, and in the embodiment, 6 transparent fused silica glass absorbing sheets are arranged. Meanwhile, the black neutral glass absorbing sheet 2 is positioned between the transparent fused silica glass absorbing sheet 1 and the base 3, a gap is reserved between the black neutral glass absorbing sheet 2 and the transparent fused silica glass absorbing sheet 1, and an included angle between the black neutral glass absorbing sheet 2 and the bottom surface 3 of the base is beta, wherein beta is more than 72 degrees.
The application method of the device for improving the stray light absorption energy density of the laser system comprises the following steps:
s1: the transparent fused silica glass absorption sheet 1 and the black neutral glass absorption sheet 2 are arranged inside the base 3;
s2: if the polarization state of the stray light is S polarization, executing a step S3; if the polarization state of the stray light is P polarization, the base is rotated by 90 degrees around the z axis, so that the polarization state of the stray light entering the transparent fused quartz glass absorption sheet 1 is S polarization, and then the step S3 is executed;
s3: the incidence angle of the stray light entering the transparent fused silica glass absorption sheet 1 is determined, and the position of the base is further adjusted according to the incidence angle, specifically:
s polarized stray light intensity A ⊥ The intensity of the S polarized stray light of primary reflection is R ⊥ The intensity of the S polarized stray light transmitted once is T ⊥ Refractive index n of air to stray light 1 The refractive index of the transparent fused silica glass absorption sheet 1 to stray light is n 2 The incidence angle of stray light incident on the transparent fused silica glass absorption sheet 1 is θ 1 A transmission angle of theta 2 The emergent angle is theta 3 Wherein, since the transparent fused silica glass absorber 1 has a double-sided parallel structure, θ 1 ＝θ 3 The method comprises the following steps:
Then, reflectance of stray light intensity:
transmittance of stray light intensity:
order the
That is, the transmittance of the stray light intensity is lower than 10% of the stray light intensity, so as to avoid the limitation of the high power laser energy density that can be tolerated by the black neutral glass absorbing sheet 2, and to determine θ 1 And (3) obtaining the product;
s4: the stray light is incident on the transparent fused silica glass absorption sheet 1 to generate a primary transmission light beam and a primary reflection light beam, the transparent fused silica glass absorption sheet 1 is marked as an initial transparent fused silica glass absorption sheet, and the primary transmission light beam is directly absorbed by the black neutral glass absorption sheet 2;
s5: the primary reflection light beam is incident to the adjacent transparent fused silica glass absorption sheet 1 to generate a secondary transmission light beam and a secondary reflection light beam, and the secondary transmission light beam is directly absorbed by the black neutral glass absorption sheet 2;
s6: and repeating the steps S4-S5 until the N-1 times of reflected light beams vertically enter the adjacent transparent fused silica absorption sheets 1.
In addition, because the reflection times of the stray light between the adjacent transparent fused quartz glass absorption sheets 1 are more than 3 times, N is more than or equal to 4. The black neutral glass absorbing sheet 2 is of a double-sided parallel structure, the selection of the black neutral glass absorbing sheet 2 is matched with the wavelength of stray light, if the wavelength of the stray light is 1053nm, the black neutral glass absorbing sheet 2 is of a ZWB2 type, and the thicknesses of the transparent fused quartz glass absorbing sheet 1 and the black neutral glass absorbing sheet 2 are about 10 mm.
The whole device has simple and compact structure and low cost, can be used for absorbing stray light with any kind of high energy in a high-power laser system, and aims at incident impurities with different energiesAstigmatism, by precisely controlling the incidence angle θ of stray light 1 The reflectivity and the transmissivity of the stray light energy can be accurately controlled, the transmissivity of the stray light energy is ensured to be lower than 10% of the incident energy, and the black neutral glass absorbing sheet 2 is further protected.
Embodiment two:
the same parts as those of the first embodiment are not repeated, and the difference is that:
when α=30° and β=75°, the highest energy density of the stray light absorbable was 82J/cm 2 。
Embodiment III:
the same parts as those of the first embodiment are not repeated, and the difference is that:
when α=25° and β=75°, the highest energy density of the stray light absorbable is 100J/cm 2 。
The foregoing detailed description of the invention has been presented for purposes of illustration and description, but is not intended to limit the scope of the invention, i.e., the invention is not limited to the details shown and described.
Claims (6)
1. The device for improving the stray light absorption energy density of the laser system is characterized by comprising a base, a transparent fused quartz glass absorption sheet and a black neutral glass absorption sheet, wherein the transparent fused quartz glass absorption sheet and the black neutral glass absorption sheet are obliquely arranged in the base and are provided with a plurality of transparent fused quartz glass absorption sheets and black neutral glass absorption sheets;
the transparent fused silica glass absorption sheets are connected end to end, the included angles of the transparent fused silica glass absorption sheets and the bottom surface of the base are equal, the included angle between two adjacent transparent fused silica glass absorption sheets is alpha, and
two adjacent transparent fused silica glass absorption sheets form a positive V shape or an inverted V shape;
the number of the black neutral glass absorbing sheets is the same as that of the transparent fused quartz glass absorbing sheets, and the black neutral glass absorbing sheets and the transparent fused quartz glass absorbing sheets are arranged in one-to-one correspondence with each other, and the black neutral glass absorbing sheets areThe color neutral glass absorbing sheet is positioned between the transparent fused silica glass absorbing sheet and the base, a gap is reserved between the black neutral glass absorbing sheet and the transparent fused silica glass absorbing sheet, the included angle between the black neutral glass absorbing sheet and the bottom surface of the base is beta,
；
the application method of the device for improving the stray light absorption energy density of the laser system comprises the following steps:
s1: mounting a transparent fused silica glass absorption sheet and a black neutral glass absorption sheet into the base;
s2: if the polarization state of the stray light is S polarization, executing a step S3; if the polarization state of the stray light is P polarization, adjusting the position of the base, and then executing the step S3;
s3: determining an incidence angle of the stray light incident on the transparent fused quartz glass absorption sheet, and further adjusting the position of the base according to the incidence angle;
s-polarized stray light intensity of
The intensity of the S-polarized stray light of primary reflection is +.>
The intensity of the S-polarized stray light transmitted once is +.>
Refractive index n of air to stray light 1 The refractive index of the transparent fused silica absorption sheet to stray light is n 2 The incidence angle of the stray light incident on the transparent fused silica glass absorption sheet is theta 1 A transmission angle of theta 2 The emergent angle is theta 3 Wherein->
Then:
Then, reflectance of stray light intensity:
transmittance of stray light intensity: />
；
Incidence angle θ of stray light incident on transparent fused silica glass absorption sheet 1 The determining method comprises the following steps: order the
Obtaining θ 1 ；
S4: the stray light is incident to the transparent fused silica glass absorption sheet to generate a primary transmission light beam and a primary reflection light beam, the transparent fused silica glass absorption sheet is marked as an initial transparent fused silica glass absorption sheet, and the primary transmission light beam is directly absorbed by the black neutral glass absorption sheet;
s5: the primary reflection light beam is incident to an adjacent transparent fused quartz glass absorption sheet to generate a secondary transmission light beam and a secondary reflection light beam, and the secondary transmission light beam is directly absorbed by a black neutral glass absorption sheet;
s6: and repeating the steps S4-S5 until the N-1 times of reflected light beams vertically enter the adjacent transparent fused silica absorption sheets.
2. The device for improving the stray light absorption energy density of a laser system according to claim 1, wherein the number of the transparent fused silica absorbing sheets and the number of the black neutral glass absorbing sheets are both even.
3. The apparatus of claim 2, wherein the transparent fused silica absorber plate has a double-sided parallel structure.
4. The device for improving the energy density of stray light absorption of a laser system according to claim 2, wherein the black neutral glass absorbing sheet has a double-sided parallel structure, and the type of the black neutral glass absorbing sheet is matched with the wavelength of the stray light.
5. The device for improving the energy density of stray light absorption of a laser system according to claim 1, wherein in the step S2, when the polarization state of the stray light is P-polarized, the base is rotated by 90 ° around the z-axis, so that the polarization state of the stray light incident on the transparent fused silica glass absorption sheet is S-polarized.
6. The device for improving energy density of stray light absorption of laser system according to claim 5, wherein the number of reflections of said stray light between adjacent transparent fused silica glass sheets is greater than 3, and
。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109445006B (en) * | 2018-12-12 | 2023-08-25 | 中国工程物理研究院激光聚变研究中心 | Stray light absorber for high-power laser system and preparation method thereof |
| CN110426766A (en) * | 2019-08-13 | 2019-11-08 | 哈尔滨工业大学 | A kind of horizontal active absorption body device |
| CN110412669A (en) * | 2019-08-13 | 2019-11-05 | 哈尔滨工业大学 | An active absorber device for light waves with a wavelength of 1053nm |
| CN112130319B (en) * | 2020-09-28 | 2023-02-28 | 中国工程物理研究院激光聚变研究中心 | Ultrahigh-flux laser beam trap and manufacturing method thereof |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3215776A (en) * | 1963-04-29 | 1965-11-02 | Douglas Aircraft Co Inc | Television set with ambient light trapping filter |
| US4632512A (en) * | 1983-05-26 | 1986-12-30 | Mergenthaler Linotype Gmbh | Variable laser attenuator |
| EP0686858A2 (en) * | 1994-06-07 | 1995-12-13 | Nissan Motor Company, Ltd. | Minute structure for showing colors by reflection and interference of natural light |
| CN1434324A (en) * | 2003-02-27 | 2003-08-06 | 上海交通大学 | Guided wave resonance based polarization method |
| JP2004151592A (en) * | 2002-10-31 | 2004-05-27 | Dainippon Printing Co Ltd | Contrast improvement sheet and back projection type screen |
| JP2006208874A (en) * | 2005-01-31 | 2006-08-10 | Dainippon Printing Co Ltd | Light diffusion sheet, its manufacturing method, and transmission-type screen |
| CN1844866A (en) * | 2005-04-08 | 2006-10-11 | 中国科学院半导体研究所 | A structure for reducing stray light in a spectroscopic instrument |
| CN101539707A (en) * | 2008-03-21 | 2009-09-23 | 富士能株式会社 | Imaging filter |
| CN101622556A (en) * | 2006-09-28 | 2010-01-06 | 拉瓦勒大学 | Systems and methods for permanently writing diffraction gratings in low phonon energy glass media |
| JP2011082298A (en) * | 2009-10-06 | 2011-04-21 | Mitsubishi Electric Corp | Laser beam absorbing device, and solid-state laser device including the same |
| CN203519165U (en) * | 2013-10-24 | 2014-04-02 | 杭州远方光电信息股份有限公司 | Spectrometer |
| CN104316985A (en) * | 2014-08-27 | 2015-01-28 | 中国科学院上海光学精密机械研究所 | Large-aperture high-power laser stray light protection absorbing device and member reinforcement method thereof |
| CN205281015U (en) * | 2015-12-26 | 2016-06-01 | 中国工程物理研究院激光聚变研究中心 | Stray light absorbing device of laser -driven ware terminal optical components |
| CN107632490A (en) * | 2016-07-19 | 2018-01-26 | 深圳市光峰光电技术有限公司 | A kind of reflective micro-structural, projection screen and optical projection system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7777172B2 (en) * | 2007-06-01 | 2010-08-17 | Fairchild Semiconductor Corporation | Methods for reducing cross talk in optical sensors |
| US20120200930A1 (en) * | 2009-10-29 | 2012-08-09 | Emi Yamamoto | Light diffusion sheet, method for producing light diffusion sheet, and display device |
-
2018
- 2018-03-09 CN CN201810192861.2A patent/CN108196325B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3215776A (en) * | 1963-04-29 | 1965-11-02 | Douglas Aircraft Co Inc | Television set with ambient light trapping filter |
| US4632512A (en) * | 1983-05-26 | 1986-12-30 | Mergenthaler Linotype Gmbh | Variable laser attenuator |
| EP0686858A2 (en) * | 1994-06-07 | 1995-12-13 | Nissan Motor Company, Ltd. | Minute structure for showing colors by reflection and interference of natural light |
| JP2004151592A (en) * | 2002-10-31 | 2004-05-27 | Dainippon Printing Co Ltd | Contrast improvement sheet and back projection type screen |
| CN1434324A (en) * | 2003-02-27 | 2003-08-06 | 上海交通大学 | Guided wave resonance based polarization method |
| JP2006208874A (en) * | 2005-01-31 | 2006-08-10 | Dainippon Printing Co Ltd | Light diffusion sheet, its manufacturing method, and transmission-type screen |
| CN1844866A (en) * | 2005-04-08 | 2006-10-11 | 中国科学院半导体研究所 | A structure for reducing stray light in a spectroscopic instrument |
| CN101622556A (en) * | 2006-09-28 | 2010-01-06 | 拉瓦勒大学 | Systems and methods for permanently writing diffraction gratings in low phonon energy glass media |
| CN101539707A (en) * | 2008-03-21 | 2009-09-23 | 富士能株式会社 | Imaging filter |
| JP2011082298A (en) * | 2009-10-06 | 2011-04-21 | Mitsubishi Electric Corp | Laser beam absorbing device, and solid-state laser device including the same |
| CN203519165U (en) * | 2013-10-24 | 2014-04-02 | 杭州远方光电信息股份有限公司 | Spectrometer |
| CN104316985A (en) * | 2014-08-27 | 2015-01-28 | 中国科学院上海光学精密机械研究所 | Large-aperture high-power laser stray light protection absorbing device and member reinforcement method thereof |
| CN205281015U (en) * | 2015-12-26 | 2016-06-01 | 中国工程物理研究院激光聚变研究中心 | Stray light absorbing device of laser -driven ware terminal optical components |
| CN107632490A (en) * | 2016-07-19 | 2018-01-26 | 深圳市光峰光电技术有限公司 | A kind of reflective micro-structural, projection screen and optical projection system |
Non-Patent Citations (3)
| Title |
|---|
| Optical modeling of laser ablated microstructures;Gower, MC;JOURNAL OF APPLIED PHYSICS;第112卷(第9期);1-9 * |
| 大口径高功率激光能量测量吸收体研究;唐菱等;电子测量技术;第33卷(第3期);5-8 * |
| 自校准连续细分光谱太阳照度仪;李新等;中国气象学会.S8 大气探测与仪器新技术、新方法;1-5 * |
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