CN1257214A - Large size image projector - Google Patents

Large size image projector Download PDF

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Publication number
CN1257214A
CN1257214A CN98127155.3A CN98127155A CN1257214A CN 1257214 A CN1257214 A CN 1257214A CN 98127155 A CN98127155 A CN 98127155A CN 1257214 A CN1257214 A CN 1257214A
Authority
CN
China
Prior art keywords
relay lens
light
image projector
focal distance
large size
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN98127155.3A
Other languages
Chinese (zh)
Inventor
李振镐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE19857580A priority Critical patent/DE19857580A1/en
Priority to CA002256201A priority patent/CA2256201A1/en
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Priority to CN98127155.3A priority patent/CN1257214A/en
Priority to IT1998MI002728A priority patent/IT1304121B1/en
Priority to JP10361283A priority patent/JP2000180759A/en
Priority to FR9816004A priority patent/FR2787591A1/en
Publication of CN1257214A publication Critical patent/CN1257214A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3129—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] scanning a light beam on the display screen
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G02B26/101—Scanning systems with both horizontal and vertical deflecting means, e.g. raster or XY scanners
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G02B26/12—Scanning systems using multifaceted mirrors

Abstract

The laser image projection device for projecting image information onto large-size screen is characterized by that two relay lenses with different focal distance are used to expand horizontal scanning angle so as to easily project image onto large-size screen. According to the optimized implemented example of said invention its image display device possesses the light source using laser, acousto-optic modulator for modulating light source according to the image signal, scanner for scanning modulated beam and a screen for displaying image on it by scanning beam.

Description

The large size image projector device
The present invention relates to a kind of large size image projector device.Specifically, disclose a kind of horizontal scanning angle and in than short distance, formed the significantly laser image projector device of screen by the expanded laser light projection arrangement.
The existing exemplary device that is used for the image demonstration is a plane component, for example the cathode ray tube (CRT) of television receiver and liquid crystal device (LCD).
Yet CRT or LCD are big more, and its manufacture difficulty is big more and its resolution is low more, thereby have limited its commercialization.
Therefore, art methods realizes on the screen significantly showing by utilizing the lens expanded images and it being projected to.But the problem of this method is because the temperature characterisitic of image display device has limited its light source power, make on the screen image of throwing to resemble matter relatively poor and brightness is lower.
The employing laser laser image projector device of light source is as an alternative developed.
Yet this laser image projector device of developing needs long projector distance owing to its horizontal scanning angle is narrower.This is because the structure of device makes picture size be determined by the number of polygonal mirror surface of revolution.Consequently, the device of traditional structure quite can not produce significantly image under the situation of long projector distance.
Fig. 1 is the synoptic diagram of expression conventional laser display device.Light source 10 is a white light laser.In the light path of light source 10, optical system 20 comprises a high reflection mirror 21, is used to change the path of laser beam that light source produces; One collimation lens 22 are used for converting laser beam to parallel beam; With a telephoto lens system, be used to adjust the bore of parallel beam.
The telephoto lens system comprises first telephoto lens 23 and second telephoto lens 24 with relative shorter focal length with long-focus.
Beam separation subsystem 25 will be separated into red, green and blue look homogeneous beam from the white light laser beam of the telephoto lens system of optical system 20.
Beam separation subsystem 25 comprises two dichroic mirror 67a, 68a and a high reflection mirror 69a.
Dichroic mirror 67a and 68a are separated into the red, green and blue color beam with beam of white light, and high reflection mirror 69a is used to change the light path of homogeneous beam.
The laser beam that is separated into the red, green and blue color beam is focused on acousto-optic modulator 61,62 and 63 by condenser lens 64a, 65a and 66a, and is modulated by picture signal.
Collimation lens 64b, 65b and 66b are separately positioned on the rear portion of photomodulator 61,62 and 63, and laser beam is reduced to parallel beam, are incident on respectively on condenser lens 64a, 65a and the 66a then.
Light beam combination subsystem 65 will be combined into a light beams through all homogeneous beams of acousto-optic modulator modulation.
Light beam combination subsystem 65 comprises two dichroic mirror 67b and 68b and high reflection mirror 69b, and high reflection mirror 69b is used to change the light path of homogeneous beam.
Beam combination by dichroic mirror by polygonal mirror 80 horizontal scannings, forms image by galvanometer 70 vertical scanning then on screen 90.Galvanometer 70 is with through the synchronous speed up-down vibration of vertical synchronizing signal, and polygonal mirror 80 is with through the synchronous high-speed rotation of horizontal-drive signal.
Scanning pattern by the light beam of sets of beams zygote system modulation changes direction through galvanometer 70 at vertical plane, and its scanning pattern changes direction through polygonal mirror 80 at surface level, thereby forms image on screen 90.
Be provided with a relay lens system between galvanometer 70 and polygonal mirror 80, being used for focused beam, to make the laser beam incident of vertical scanning be the effective coverage on horizontal scanning surface on polygonal mirror 80 surfaces.
This relay lens system comprises two lens 31 and 32 with the same focal length, and being set to therebetween, spacing is the summation of each focal length.
Light beam by polygonal mirror is presented on the screen through f θ lens 34.
In said structure, the picture size that is presented on the screen is decided by scan angle, and scan angle is decided by horizontal scan angle.Horizontal scan angle is decided by the number of faces of polygonal rotating mirror.This horizontal scan angle is by following equation 1 decision.
Equation 1
θ=720 °/polygonal mirror surface number
For example, under the situation of 24 polygonal mirrors, its horizontal scan angle is fixed as 30 °.
On the other hand, galvanometer is a up-down vibration, so its horizontal scan angle can arbitrarily be adjusted.In said structure, so because the horizontal scan angle of polygonal mirror be fix should adjust galvanometric vertical scan angle so that the image ratio is 4: 3 according to the horizontal scan angle of polygonal mirror.
For according to embodiment of NTSC (National Television System Committee (NTSC)) picture signal and show events image, should produce 30 scanning and 525 horizontal lines of each scanning employing by per second.That is to say that per second is handled 15,750 lines, its horizontal sweep speed be 15.75KHz for 24 polygonal mirrors, rotate 24 lines of week scanning.For per second is handled 15,750 lines, these 24 polygonal mirrors should rotate 656.24 times by per second, are 39 thereby need its velocity of rotation, 375RPM (rev/min).
As mentioned above, the scan angle of should improving the standard shows to realize large scale, and in order to expand horizontal scan angle, it is favourable adopting the polygonal mirror with less surface of revolution.On the other hand, in order to handle the NTSC picture signal, should increase the number of revolutions of polygonal mirror.
Yet,, be inappropriate so reduce the surperficial number of polygonal mirror because polygonal mirror is restricted on the increase number of revolutions.
Thereby, show for realizing large scale, should increase projector distance.
For increasing projector distance, for example amplifying lens of a beam expander optical system can be installed, but this needs complicated design and space on light path.
The object of the invention is to provide a kind of large size image projector device of guaranteeing high resolving power and high brightness.
According to a preferred embodiment of the invention, the large size image projector device has a light source, a device that is used for according to the video signal modulated beam of light, with a device that is used for modulated beam of light is invested screen, described projection arrangement comprises a polygonal mirror, be used for the horizontal scanning modulated beam of light, one first relay lens, have focal distance f 1 and be located at before the polygonal mirror, one second relay lens, have the focal distance f 2 that is shorter than focal distance f 1 relatively and be located at before first relay lens and a galvanometer, be used for the light beam that vertical scanning receives from second relay lens.
Fig. 1 represents the synoptic diagram of traditional images projection arrangement.
Fig. 2 represents the synoptic diagram of the image projection device of one embodiment of the present of invention.
Fig. 3 represents the enlarged drawing of the scanning subsystem of laser image projector device.
10,100: light source
20: light-source system
21,69a 69b, 210,690a, 690b, 710,720: high reflection mirror
22,64b, 65b, 66b, 220,640b, 650b, 660: collimation lens
23,24: telephoto lens
230,240: extender lens
25,250: the beam separation subsystem
67a, 68a, 670a, 680a: dichroic mirror
64a, 65a, 66a, 640a, 650a, 660a: condenser lens
61,62,63,610,620,630: acousto-optic modulator (AOM)
65,650: the light beam combination subsystem
65b, 68b, 670b, 680b: dichroic mirror
70,700: galvanometer
80,800: polygonal mirror
90,900: screen
31,32,310,320: relay lens system
34:f θ lens combination
850: catoptron
θ 1: the initial level scan angle
θ 2: the expansion horizontal scan angle
F1: the first relay lens focal length
F2: the second relay lens focal length
In the preferred embodiment of the present invention, changed the structure of scanning subsystem, make through the combined laser beam of image signal modulation before by vertical scanning earlier by in addition horizontal scanning of polygonal mirror.
By relay lens system, be focused on the galvanometer and through the laser beam of horizontal scanning, thereby demonstrate picture by vertical scanning.
Horizontal scan angle is decided by the surface of revolution number of polygonal mirror and for fixed value, simultaneously galvanometer up-down vibration and can adjust vertical scan angle.
Relay lens system of the present invention is used to expand horizontal scan angle, and with the vertical scanning beam convergence in the horizontal scanning subsystem or with the horizontal scanning beam convergence in the vertical scanning subsystem.
Relay lens system has two convex lens, and one of these two convex lens (first relay lens) are located near the polygonal mirror place, and another (second relay lens) is located near the galvanometer place.Distance between these two relay lenss is the summation of its focal length.
The focal length of tradition relay lens is mutually the same, and characteristics of the present invention are that the focal distance f 1 of first relay lens is longer than the focal distance f 2 of second relay lens.This makes and can expand horizontal scan angle than the ratio of f2 with f1, thereby image is presented on the large scale screen.
Therefore, can image be presented on the large scale screen at short projector distance place according to increasing galvanometric vertical scan angle when expansion the proportional of horizontal scan angle with required ratio, making.
With reference to Fig. 2, the following describes the primary structure and the principle of work of laser image projector device.
Light source (100) is a white light laser, and light source converts parallel beam to by collimation lens 220.
High reflection mirror 210 has changed the light path of parallel beam, and the bore of parallel beam is expanded with amplification ratio by extender lens system 230 and 240.This expansion bundle is intended to keep acousto-optic modulator 610,620 and 630 the highest signal handling capacities.
The extender lens system has first extender lens of long-focus and second extender lens of relative shorter focal length.
The white light laser beam enters beam separation subsystem 250 by the extender lens system.Beam separation subsystem 250 has two dichroic mirror 670a and 680a and a high reflection mirror 690a.
Dichroic mirror is separated into the red, green and blue color beam with beam of white light, and high reflection mirror 690a changes the light path of homogeneous beam.
By condenser lens 640a, 650a and 660a focus on acousto-optic modulator 610,620 and 630 separated laser beam, and are modulated by picture signal respectively.
Be positioned at the collimation lens 640b of acousto-optic modulator back, 650b and 660b revert to parallel beam with modulating lasering beam, are incident on the condenser lens then.
Light beam combination subsystem 650 will be combined into a light beams through the red, green and blue color beam of acousto-optic modulator modulation according to picture signal.This light beam combination subsystem comprises two dichroic mirror 670a and 680a and a high reflection mirror 690a.
Beam combination is by high reflection mirror 710 and 720 directive polygonal mirrors 800 and by horizontal scanning.Focus on the surface of galvanometer catoptron through the light beam of horizontal scanning by the relay lens system between galvanometer and polygonal mirror 310 and 320, and by vertical scanning.
Relay lens system comprises first relay lens 310 and second relay lens 320, and they are two convex lens, is arranged to the summation of each interval for its focal length.
In the present invention, the focal length of first relay lens 310 is longer than the focal length of second relay lens 320, and the focal length of traditional convex lens is identical.Second relay lens is with its focal distance ratio expansion horizontal scan angle.
Image through polygonal mirror and galvanometer scanning is projected on the screen 900 by the catoptron 850 that is positioned at galvanometer top.
The enlarged drawing of the scanning subsystem of the laser image projector device of Fig. 3 presentation graphs 2.
The principle of work of scanning subsystem is described below with reference to Fig. 3.Beam combination directive polygonal mirror 800.When polygonal mirror when rotation inhour, beam combination is with 1., 2. and 3. order directive first relay lens 310.
1. 7. the light beam of being penetrated by light path refracts to light path through 4. directive second relay lens 320 of light path, and directive galvanometer 700.
2. the light beam of being penetrated by light path is successively through 5. and 8. directive galvanometer of light path.
3. the light beam of being penetrated by light path is successively through 6. and 9. directive galvanometer of light path.
Relay lens system utilizes the focal distance f 1 and the f2 of first relay lens 310 and second relay lens 320 to be constructed.
First relay lens 310 be arranged to polygonal mirror 800 at a distance of focal distance f 1, with second relay lens 320 at a distance of being the summation of focal length (f1 and f2).
Second relay lens is arranged to and the galvanometer focal distance f 2 of being separated by.
Relay lens system by above-mentioned structure makes that laser beam can be along Fig. 3 path movement.
The expansion of horizontal scan angle is determined according to the ratio of two relay lens focal lengths.Expanded sweep angle θ 2With the initial level scan angle theta 1Relation determine by following equation 2.[equation 2]
θ 1/θ 2＝f 2/f 1
In above-mentioned equation 2, the extensive ratio of horizontal scanning is decided by the focal distance ratio of two relay lenss, thereby when the focal distance ratio on the right side was big more, the expanded sweep angle in left side was also big more.
Therefore, galvanometer increases vertical scan angle according to the ratio of the horizontal scan angle of retouching expansion, thereby obtains the picture ratio of 4 to 3 (long than wide).
The image that is incident upon on the galvanometer is projected in forward on the screen 900 by catoptron 850.
The invention provides a kind of laser image projector device, by the focal length of two relay lenss in the relay lens system is set as different value, and according to this focal length value polygonal mirror and galvanometer are set, have improved horizontal scan angle, be easy to set up significantly screen at short projector distance place even make.

Claims (7)

1. a laser image projector device significantly has a light source, a device and a device that is used for modulated beam of light is projected to screen that is used for according to the video signal modulated beam of light, and described projection arrangement comprises:
A polygonal mirror is used for the horizontal scanning modulated beam of light;
One first relay lens has focal distance f 1, is arranged on the front of polygonal mirror;
One second relay lens has the focal distance f 2 short with respect to focal distance f 1, is arranged on the front of first relay lens;
A galvanometer is used for the light beam that vertical scanning receives from second relay lens.
2. large size image projector device as claimed in claim 1 is adjusted the horizontal scan angle of described polygonal mirror by the focal distance ratio of described two relay lenss.
3. as claim 1 or 2 arbitrary described large size image projector devices, the distance between wherein said first relay lens and the described polygonal mirror is described focal distance f 1.
4. arbitrary described large size image projector device in 3 claims as described above, the distance between wherein said first relay lens and described second relay lens be described focal distance f 1 and described focal distance f 2 and.
5. large size image projector device as claimed in claim 4, the distance between wherein said second relay lens and the described galvanometer are described focal distance f 2.
6. large size image projector device as claimed in claim 5, wherein said first and second relay lenss are convex lens.
7. arbitrary described large size image projector device in 6 claims as described above, wherein said light source is a white light laser.
CN98127155.3A 1998-12-14 1998-12-16 Large size image projector Pending CN1257214A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE19857580A DE19857580A1 (en) 1998-12-14 1998-12-14 Laser image large screen image projection having light source/modulation vertical sweep mirror impinging and relay lens polygonal horizontal rotating mirror reflecting horizontal sweep.
CA002256201A CA2256201A1 (en) 1998-12-14 1998-12-15 A large image projection apparatus
CN98127155.3A CN1257214A (en) 1998-12-14 1998-12-16 Large size image projector
IT1998MI002728A IT1304121B1 (en) 1998-12-14 1998-12-18 LARGE IMAGE PROJECTION EQUIPMENT
JP10361283A JP2000180759A (en) 1998-12-14 1998-12-18 Projector
FR9816004A FR2787591A1 (en) 1998-12-14 1998-12-18 Laser image large screen image projection having light source/modulation vertical sweep mirror impinging and relay lens polygonal horizontal rotating mirror reflecting horizontal sweep.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19857580A DE19857580A1 (en) 1998-12-14 1998-12-14 Laser image large screen image projection having light source/modulation vertical sweep mirror impinging and relay lens polygonal horizontal rotating mirror reflecting horizontal sweep.
CA002256201A CA2256201A1 (en) 1998-12-14 1998-12-15 A large image projection apparatus
CN98127155.3A CN1257214A (en) 1998-12-14 1998-12-16 Large size image projector
IT1998MI002728A IT1304121B1 (en) 1998-12-14 1998-12-18 LARGE IMAGE PROJECTION EQUIPMENT
JP10361283A JP2000180759A (en) 1998-12-14 1998-12-18 Projector
FR9816004A FR2787591A1 (en) 1998-12-14 1998-12-18 Laser image large screen image projection having light source/modulation vertical sweep mirror impinging and relay lens polygonal horizontal rotating mirror reflecting horizontal sweep.

Publications (1)

Publication Number Publication Date
CN1257214A true CN1257214A (en) 2000-06-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN98127155.3A Pending CN1257214A (en) 1998-12-14 1998-12-16 Large size image projector

Country Status (6)

Country Link
JP (1) JP2000180759A (en)
CN (1) CN1257214A (en)
CA (1) CA2256201A1 (en)
DE (1) DE19857580A1 (en)
FR (1) FR2787591A1 (en)
IT (1) IT1304121B1 (en)

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CN100403162C (en) * 2003-05-29 2008-07-16 精工爱普生株式会社 Screen, image display device and rear projector
CN103018900A (en) * 2009-11-09 2013-04-03 索尼公司 Light projection device
CN104503195A (en) * 2014-12-03 2015-04-08 武阳 Device used for whole row scanning type laser projection display and synchronization control method thereof
CN105446063A (en) * 2014-09-23 2016-03-30 武阳 Whole-row scanning type laser projection display device
CN112584112A (en) * 2020-12-02 2021-03-30 深圳市当智科技有限公司 Projection method and system based on size correction and readable storage medium
CN114339182A (en) * 2021-12-30 2022-04-12 上海顺久电子科技有限公司 Focusing method of projection equipment, projection equipment and storage medium
CN114594575A (en) * 2022-03-31 2022-06-07 歌尔光学科技有限公司 Optical projection system and electronic equipment

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JP2002148554A (en) * 2000-11-03 2002-05-22 Samsung Electronics Co Ltd Optical scanner and laser video projector applying the same and driving method for the same
EP1733270A2 (en) * 2004-03-31 2006-12-20 Koninklijke Philips Electronics N.V. Projection system with scanning device
JP2009093984A (en) * 2007-10-11 2009-04-30 Hitachi Displays Ltd Organic el display device and its manufacturing method
JP2011003558A (en) * 2010-10-07 2011-01-06 Hitachi Displays Ltd Manufacturing method for display device
WO2013046904A1 (en) * 2011-09-27 2013-04-04 日本電気株式会社 Optical scanning device, image display device and method for adjusting projection area
JP5804115B2 (en) * 2014-03-17 2015-11-04 ソニー株式会社 Irradiation direction change system
DE102014107860A1 (en) * 2014-06-04 2015-12-17 Ldt Laser Display Technology Gmbh Device for projecting an image on a projection screen
US20230324779A1 (en) 2022-03-25 2023-10-12 Light Show Technology Co., LTD. Projection display device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3812480A1 (en) * 1988-04-15 1989-10-26 Agfa Gevaert Ag Computer-controlled laser drawing device having an arrangement for switching on the laser beam at the beginning of a line of a drawing sheet
JPH0341890A (en) * 1989-07-07 1991-02-22 Pioneer Electron Corp Beam index type color display device
JPH04204812A (en) * 1990-11-30 1992-07-27 Sony Corp Laser image display device
JP3353320B2 (en) * 1992-02-17 2002-12-03 ソニー株式会社 Gradation correction device and laser display device

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Publication number Priority date Publication date Assignee Title
CN100403162C (en) * 2003-05-29 2008-07-16 精工爱普生株式会社 Screen, image display device and rear projector
CN103018900A (en) * 2009-11-09 2013-04-03 索尼公司 Light projection device
CN105892205A (en) * 2014-09-23 2016-08-24 武阳 One-dimensional imaging apparatus and whole-line scanning type laser projection display system
CN105446063A (en) * 2014-09-23 2016-03-30 武阳 Whole-row scanning type laser projection display device
CN105892202A (en) * 2014-09-23 2016-08-24 武阳 Whole-line scanning type laser projection display device
CN105892204A (en) * 2014-09-23 2016-08-24 武阳 One-dimensional imaging apparatus and whole-line scanning type laser projection display system
CN105892203A (en) * 2014-09-23 2016-08-24 武阳 Whole-line scanning type laser projection display device
CN105892206A (en) * 2014-09-23 2016-08-24 武阳 One-dimensional imaging apparatus and whole-line scanning type laser projection display system
CN104503195A (en) * 2014-12-03 2015-04-08 武阳 Device used for whole row scanning type laser projection display and synchronization control method thereof
CN112584112A (en) * 2020-12-02 2021-03-30 深圳市当智科技有限公司 Projection method and system based on size correction and readable storage medium
CN112584112B (en) * 2020-12-02 2023-10-03 深圳市当智科技有限公司 Projection method, system and readable storage medium based on size correction
CN114339182A (en) * 2021-12-30 2022-04-12 上海顺久电子科技有限公司 Focusing method of projection equipment, projection equipment and storage medium
CN114339182B (en) * 2021-12-30 2024-03-26 上海顺久电子科技有限公司 Focusing method of projection device, projection device and storage medium
CN114594575A (en) * 2022-03-31 2022-06-07 歌尔光学科技有限公司 Optical projection system and electronic equipment

Also Published As

Publication number Publication date
JP2000180759A (en) 2000-06-30
CA2256201A1 (en) 2000-06-15
ITMI982728A1 (en) 2000-06-18
FR2787591A1 (en) 2000-06-23
DE19857580A1 (en) 2000-06-29
IT1304121B1 (en) 2001-03-07

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