WO2008113466A1 - Roue chromatique comprenant des masses d'équilibrage individuelles le long d'une glissièer - Google Patents

Roue chromatique comprenant des masses d'équilibrage individuelles le long d'une glissièer Download PDF

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Publication number
WO2008113466A1
WO2008113466A1 PCT/EP2008/001635 EP2008001635W WO2008113466A1 WO 2008113466 A1 WO2008113466 A1 WO 2008113466A1 EP 2008001635 W EP2008001635 W EP 2008001635W WO 2008113466 A1 WO2008113466 A1 WO 2008113466A1
Authority
WO
WIPO (PCT)
Prior art keywords
balancing
color wheel
guide
mass
masses
Prior art date
Application number
PCT/EP2008/001635
Other languages
German (de)
English (en)
Inventor
Emil Janicek
Original Assignee
Oerlikon Trading Ag, Trübbach
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 claimed from DE102007013899.9 external-priority patent/DE102007013899B4/de
Application filed by Oerlikon Trading Ag, Trübbach filed Critical Oerlikon Trading Ag, Trübbach
Priority to KR1020097019396A priority Critical patent/KR101428126B1/ko
Priority to EP08716157A priority patent/EP2130081A1/fr
Priority to CN2008800089910A priority patent/CN101663606B/zh
Priority to JP2009553943A priority patent/JP5288138B2/ja
Publication of WO2008113466A1 publication Critical patent/WO2008113466A1/fr

Links

Classifications

    • 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
    • G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
    • G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/30—Compensating imbalance
    • G01M1/36—Compensating imbalance by adjusting position of masses built-in the body to be tested
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B11/00—Filters or other obturators specially adapted for photographic purposes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B33/00—Colour photography, other than mere exposure or projection of a colour film
    • G03B33/08—Sequential recording or projection
    • 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]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
    • H04N9/3114—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources by using a sequential colour filter producing one colour at a time
    • 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]
    • H04N9/3141—Constructional details thereof

Definitions

  • the present invention relates to color wheels used, for example, in projectors to enable color sequential lighting.
  • the present invention also relates to projectors using such color wheels.
  • Optical systems which use such components are, for example, image projectors or display arrangements. Typical applications are back or front projectors for television systems.
  • color filters are introduced into the optical path of a light beam in rapid succession.
  • a carrier is used, which is equipped at its periphery with circularly arranged color filter segments.
  • This arrangement forms a color rotor, wherein parts of the segments protrude radially beyond the carrier and thereby form a color ring.
  • This color ring is intended to be inserted into the optical light path.
  • the color rotor is rotated about its central axis. Due to the rotation of the color rotor, the filter segments are alternately moved in and out of the optical path. This results in the desired rapid sequence of color change.
  • the color rotor is mounted on a motor which rotates it. The color rotor and the motor form a color wheel.
  • the imaging system Since the imaging system must be capable of producing high quality images, the color changes must be made in a very rapid sequence. This means that the filter segments must be moved through the optical path of the light beam at a very high speed. This requires a fast rotation of the color rotor. The result is that large forces resulting from centrifugal accelerations and several hundred times greater than the gravitational acceleration g act on the color rotor and in particular on the sensitive segments. For a particularly good image quality, the accelerations can exceed 1000 g.
  • Such imaging systems must also be very high Satisfy brightness requirements that can only be achieved by powerful light sources. Due to this powerful light sources, the component corresponding to high temperatures of up to 100 c C is exposed.
  • the color rotor is rotated and measured the imbalance. There is always imbalance when the center of gravity of the rotor does not coincide with the axis of rotation. This can be corrected in two ways. Either mass is removed from the rotor at a certain off-axis point (negative balance) or mass is added to the rotor at a certain other point spaced from the axis (positive balance).
  • Negative balance typically drills holes in the carrier. If the color rotor remains connected to the motor during drilling, it is quite possible that the bearings will suffer from the forces that may be exerted on them during the drilling process. You might also think about removing the color rotor from the engine before drilling the holes. Unfortunately, this is very time consuming and therefore makes balancing expensive. This is especially true when balancing is done in an iterative manner (rotation - first correction - rotation - second correction - ). As part of the positive balancing an additional balance weight is attached to the rotor. For color wheels, a bead of adhesive is typically attached to the carrier. If the bulk of the adhesive is insufficient, the adhesive is used to adhere other higher density material, such as a piece of steel, to the backing.
  • the carrier or another part of the rotor comprises a container with an annular volume in which the adhesive can be taken up as a balancing mass.
  • the adhesive and, if necessary, for example, some metal beads are introduced into the container.
  • the amount introduced into the container is so small that it does not completely fill the container. If such an arrangement is set in rotation, the adhesive and, if appropriate, the beads will automatically flow into the correct axial position in order to minimize the imbalance. Thereafter, the adhesive is cured. Care must be taken to ensure that the adhesive remains in place after rotation and / or during curing. Again, one degree of freedom is less available for balancing, since the radial position is predetermined by the container.
  • the previously described balancing methods invariably referred to balancing in only one plane. This is often sufficient, especially if the rotor can be approximately described by a thin plate and if it comes only to moderate speeds. However, color rotors in color wheels are often rotated at speeds of 7,000 rpm (revolutions per minute) to 15,000 rpm. In these cases, the balancing is done in only one e- sometimes not sufficient and the balancing must be carried out for at least two distinctly spaced planes perpendicular to the axis of rotation.
  • the goal can be achieved with a color wheel in which two or more compensating masses are provided on an annular guide.
  • the guide is arranged substantially coaxially to the axis of rotation of the color wheel.
  • the balancing weights are arranged before and during the balancing process along the guide movable on the guide.
  • the degree of mobility is chosen such that the balancing weights do not move due to their own weight, but can be manually moved along the guide with the necessary force.
  • the total balancing mass is defined as the sum of the masses of all the individual balancing masses that are movable as described above. This total balancing weight is chosen so high that it is sufficient to compensate for the reasonably expected maximum imbalance. These are up to 60mg for today's color wheels.
  • the balancing masses are initially arranged so that the center of gravity of the balancing mass system comes to rest essentially on the axis of rotation of the color wheel.
  • the color rotor is then rotated by the motor and the imbalance of the color wheel is measured. Based on this measurement can then be calculated where the center of gravity of the compensation mass system is to be arranged in order to minimize the imbalance of the color wheel.
  • One or more balance masses are then moved along the guide to move the center of gravity of the leveling system to the desired position. It is possible to use a series of iteration steps of measuring the remaining balance and moving the balance masses to minimize the imbalance.
  • Figure 1 shows the plan view of a color wheel according to an embodiment of the present invention.
  • Figure 2 shows the cross section of the color wheel of Figure 1 along the line AA '.
  • Figure 1 shows the plan view of a color wheel 1 according to the present invention with filter segments 3, 3 ', and 3 "and a cover with a circular rail 5 forming the guide, the cover being on the segments 3, 3' and 3" arranged that the center of the circular rail 5 is at least substantially loaned to the axis of rotation of the color wheel.
  • two brackets 7, T are arranged to move with the same mass and form a leveling system.
  • the brackets in the example each have a mass of 20 mg and consist of sheet metal. Other materials, such as plastic or spring steel are possible.
  • the balancing mass system therefore has a total mass of 40 mg.
  • the arms of the clamps 7, T press against the sidewalls of the rail 5.
  • FIG. 2 shows the cross section of the color wheel 1 of FIG. 1 along the line AA '. This figure additionally shows a previously concealed disc-shaped carrier 9 to which the segments 3, 3 ', 3 "and the motor (not shown here) are arranged.
  • brackets 7, 7 ' are placed on the rail 5 so as to be diametrically opposite, i. the connecting line through the center 11, which marks the position of the axis of rotation go. Since the brackets have the same mass, so that their common center of gravity in the center 11 and thus initially contributes nothing to the imbalance.
  • the imbalance is measured.
  • the color wheel is set in rotation and measured the lateral forces on the motor during rotation. From these measurements, the direction and the amount of a compensating mass to be applied can be determined in a previously selected distance in a manner known and not further described here.
  • one of the previous input parameters of a corresponding measuring device is the specification at which distance from the axis a compensating mass is to be applied. The device then determines the amount of mass required and its angular position. It is clear that at any previously chosen distance a certain mass leads to balancing; the product of distance and mass is constant.
  • a distance of 2 cm is selected for the calibration of the measuring instrument, which corresponds to the radius R of the rail 5.
  • a balance mass of 12 mg in a certain direction is needed to eliminate the imbalance
  • M mes is the balancing mass determined by the measuring instrument which would have to be mounted on the guide and if the two balancing masses available each have a mass M 3 , these are placed in a position on the guide rail.
  • the invention therefore relates to a color wheel with balancing device, wherein the balancing device comprises a substantially circular guide that their
  • Circular center on the axis of rotation defined by the color wheel and on the guide at least two along the guide individually movable Balancing masses which together form a balancing mass system, are provided in such a way that in order to move each of the balancing masses along the guide, a force is necessary which is greater than the weight of the respective balancing mass.
  • such a color wheel is characterized in that the guide is formed by a formation of a component of the rotor of the color wheel and the balancing masses of the balancing mass system clasp this formation in cross-section.
  • such a color wheel is characterized in that the guide is formed by an indentation of a component of the rotor of the color wheel and the indentation encloses the balancing weights of the balancing mass system in cross section.
  • the color wheel has respective pairs of balance masses of the balance mass system with substantially equal mass.
  • the balancing mass system can also be designed so that it comprises only two balancing masses, which may in particular have the same mass.
  • the balancing masses are arranged on the guide such that the center of gravity of the balancing mass system is located substantially on the axis of rotation of the color wheel
  • the position is determined at which a total mass of the balancing system corresponding balancing mass would be to achieve balancing of the color wheel - and in a subsequent third step, at least one of the balancing masses is moved so that the center of gravity of Balancing mass system on the previously determined position at which one of the total mass of the Auswuchtmassensystems corresponding balancing mass would be to install, comes to rest.
  • the balancing masses can be fixed immovably after balancing in a final step on and along the guide.
  • the balancing system of the color wheel comprises only a first counterbalancing mass and a second counterbalancing mass, then it can be balanced according to a method
  • the balancing masses are arranged diametrically opposite
  • the color wheel is rotated by the motor in rotation and the imbalance is measured - and in the third step, the balancing weights are moved to the intersection of a straight line with the guide, the straight line through the second Step determined position and is perpendicular to the line connecting the circle center and position.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Astronomy & Astrophysics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Testing Of Balance (AREA)

Abstract

L'invention concerne une roue chromatique comprenant un dispositif d'équilibrage. Le dispositif d'équilibrage comprend une glissière circulaire et au moins deux masses d'équilibrage mobiles le long de la glissière et agencées dessus. La mobilité des masses d'équilibrage est limitée, de sorte qu'elles ne se déplacent pas sous l'effet de leur propre poids. L'invention concerne également un procédé d'équilibrage de la roue chromatique, selon lequel les masses d'équilibrage sont montées au départ sur la glissière, de sorte que le centre de gravité du système de masse d'équilibrage qu'elles forment repose sur l'axe de rotation de la roue chromatique. Le déséquilibre est alors mesuré et la position, à laquelle le centre de gravité du système de masse d'équilibrage est déplacé vers une position définie est déterminée, du fait que les masses d'équilibrage sont déplacées le long de la glissière.
PCT/EP2008/001635 2007-03-20 2008-02-29 Roue chromatique comprenant des masses d'équilibrage individuelles le long d'une glissièer WO2008113466A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020097019396A KR101428126B1 (ko) 2007-03-20 2008-02-29 가이드를 따라 개별 밸런싱 추를 구비한 컬러 휠
EP08716157A EP2130081A1 (fr) 2007-03-20 2008-02-29 Roue chromatique comprenant des masses d'équilibrage individuelles le long d'une glissièer
CN2008800089910A CN101663606B (zh) 2007-03-20 2008-02-29 沿导轨具有独特的平衡质量的色轮
JP2009553943A JP5288138B2 (ja) 2007-03-20 2008-02-29 案内部に沿って個別的なつり合い質量体を備えるカラーホイール

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007013899.9 DE102007013899B4 (de) 2007-03-20 Verfahren zum Auswuchten eines Farbrades mit individuellen Auswuchtmassen entlang einer Führung
DE102007013899A DE102007013899A1 (de) 2007-03-20 2007-03-20 Farbrad mit individuellen Auswuchtmassen entlang einer Führung

Publications (1)

Publication Number Publication Date
WO2008113466A1 true WO2008113466A1 (fr) 2008-09-25

Family

ID=39433810

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/001635 WO2008113466A1 (fr) 2007-03-20 2008-02-29 Roue chromatique comprenant des masses d'équilibrage individuelles le long d'une glissièer

Country Status (6)

Country Link
EP (1) EP2130081A1 (fr)
JP (1) JP5288138B2 (fr)
KR (1) KR101428126B1 (fr)
CN (1) CN101663606B (fr)
DE (1) DE102007013899A1 (fr)
WO (1) WO2008113466A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114112190A (zh) * 2021-10-20 2022-03-01 湖北三江航天江北机械工程有限公司 异型脆性陶瓷结构件质心、质偏检测工装及检测方法

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US9333904B2 (en) * 2012-03-08 2016-05-10 Koninklijke Philips N.V. Controllable high luminance illumination with moving light-sources
CN103383518A (zh) * 2012-05-04 2013-11-06 宝镇光电科技股份有限公司 影像直接输出装置
CN104166207B (zh) * 2013-05-19 2017-10-24 沈阳峰点科技有限公司 一种多层轮盘转动装置
DE102020103123A1 (de) 2020-02-07 2021-08-12 Schott Ag Konverterrad mit stufenlos einstellbarer Auswuchtung
CN114326275B (zh) * 2020-09-29 2023-05-26 中强光电股份有限公司 光学处理转盘以及投影装置

Citations (5)

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US4003265A (en) * 1975-07-09 1977-01-18 Litton Systems, Inc. Mass balancing system for rotatable assemblies
DE8708770U1 (de) * 1987-06-24 1987-08-13 PWZ Equipment Corp., Mauren Werkzeugaufnahme
US5074723A (en) * 1989-04-13 1991-12-24 Kennametal Inc. Method and apparatus for balancing a rotary tool assembly
US6705733B1 (en) * 2002-10-02 2004-03-16 Prodisc Technology Inc. Color wheel and washer thereof
US20060227442A1 (en) * 2005-04-07 2006-10-12 Premier Image Technology Corporation Color wheel with dovetailed balancing groove

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US3017224A (en) * 1959-09-04 1962-01-16 Elmer D Palmer Wheel-balancing assembly for truck wheels and the like
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JPH05281076A (ja) * 1992-03-31 1993-10-29 Kokusai Keisokki Kk 回転体の釣合せ方法及びその方法によるタイヤホイールへのバランスウェイト装着装置
TW487178U (en) * 2001-08-17 2002-05-11 Coretronic Corp Color wheel with dynamically balanced slot
TW528170U (en) * 2002-07-04 2003-04-11 Prodisc Technology Inc Color wheel and motor for color wheel
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TWI226942B (en) * 2003-11-11 2005-01-21 Asia Optical Co Inc Filter set and color wheel with the filter set
JP4507592B2 (ja) * 2003-12-25 2010-07-21 カシオ計算機株式会社 投影型表示装置
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JP2006323116A (ja) * 2005-05-19 2006-11-30 Chinontec Kk カラーホイール、カラーホイール装置及びプロジェクタ装置
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US4003265A (en) * 1975-07-09 1977-01-18 Litton Systems, Inc. Mass balancing system for rotatable assemblies
DE8708770U1 (de) * 1987-06-24 1987-08-13 PWZ Equipment Corp., Mauren Werkzeugaufnahme
US5074723A (en) * 1989-04-13 1991-12-24 Kennametal Inc. Method and apparatus for balancing a rotary tool assembly
US6705733B1 (en) * 2002-10-02 2004-03-16 Prodisc Technology Inc. Color wheel and washer thereof
US20060227442A1 (en) * 2005-04-07 2006-10-12 Premier Image Technology Corporation Color wheel with dovetailed balancing groove

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114112190A (zh) * 2021-10-20 2022-03-01 湖北三江航天江北机械工程有限公司 异型脆性陶瓷结构件质心、质偏检测工装及检测方法

Also Published As

Publication number Publication date
DE102007013899A1 (de) 2008-09-25
CN101663606A (zh) 2010-03-03
EP2130081A1 (fr) 2009-12-09
JP5288138B2 (ja) 2013-09-11
KR20100014442A (ko) 2010-02-10
KR101428126B1 (ko) 2014-08-07
CN101663606B (zh) 2013-08-14
JP2010521710A (ja) 2010-06-24

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