DE69126884T2 - Abtaststrahlkontrollsystem mit versetzter referenzskala - Google Patents

Abtaststrahlkontrollsystem mit versetzter referenzskala

Info

Publication number
DE69126884T2
DE69126884T2 DE69126884T DE69126884T DE69126884T2 DE 69126884 T2 DE69126884 T2 DE 69126884T2 DE 69126884 T DE69126884 T DE 69126884T DE 69126884 T DE69126884 T DE 69126884T DE 69126884 T2 DE69126884 T2 DE 69126884T2
Authority
DE
Germany
Prior art keywords
light beam
reference scale
scan line
optical
modulated light
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.)
Expired - Fee Related
Application number
DE69126884T
Other languages
English (en)
Other versions
DE69126884D1 (de
Inventor
Alward Pinard
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.)
Optronics International Corp
Original Assignee
Optronics International Corp
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
Application filed by Optronics International Corp filed Critical Optronics International Corp
Application granted granted Critical
Publication of DE69126884D1 publication Critical patent/DE69126884D1/de
Publication of DE69126884T2 publication Critical patent/DE69126884T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/047Detection, control or error compensation of scanning velocity or position
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/12Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
    • G06K15/1204Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers involving the fast moving of an optical beam in the main scanning direction
    • G06K15/1219Detection, control or error compensation of scanning velocity or position, e.g. synchronisation
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/12Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
    • G06K15/1238Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point
    • G06K15/1257Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on more than one main scanning line
    • G06K15/1271Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on more than one main scanning line by light beam splitting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/1013Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/113Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using oscillating or rotating mirrors
    • H04N1/1135Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using oscillating or rotating mirrors for the main-scan only
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/191Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
    • H04N1/1911Simultaneously or substantially simultaneously scanning picture elements on more than one main scanning line, e.g. scanning in swaths
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/024Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
    • H04N2201/02406Arrangements for positioning elements within a head
    • H04N2201/02416Rotational positioning, i.e. with respect to an axis
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/024Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
    • H04N2201/02406Arrangements for positioning elements within a head
    • H04N2201/02439Positioning method
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/024Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
    • H04N2201/02406Arrangements for positioning elements within a head
    • H04N2201/02439Positioning method
    • H04N2201/02441Positioning method using screws
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/024Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
    • H04N2201/02406Arrangements for positioning elements within a head
    • H04N2201/02439Positioning method
    • H04N2201/02443Positioning method using adhesive
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701Detection of scanning velocity or position
    • H04N2201/0471Detection of scanning velocity or position using dedicated detectors
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701Detection of scanning velocity or position
    • H04N2201/04715Detection of scanning velocity or position by detecting marks or the like, e.g. slits
    • H04N2201/04727Detection of scanning velocity or position by detecting marks or the like, e.g. slits on a linear encoder
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701Detection of scanning velocity or position
    • H04N2201/04729Detection of scanning velocity or position in the main-scan direction
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701Detection of scanning velocity or position
    • H04N2201/04731Detection of scanning velocity or position in the sub-scan direction
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701Detection of scanning velocity or position
    • H04N2201/04734Detecting at frequent intervals, e.g. once per line for sub-scan control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701Detection of scanning velocity or position
    • H04N2201/04744Detection of scanning velocity or position by detecting the scanned beam or a reference beam
    • H04N2201/04746Detection of scanning velocity or position by detecting the scanned beam or a reference beam after modulation by a grating, mask or the like
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701Detection of scanning velocity or position
    • H04N2201/04749Detecting position relative to a gradient, e.g. using triangular-shaped masks, marks or gratings
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04753Control or error compensation of scanning position or velocity
    • H04N2201/04755Control or error compensation of scanning position or velocity by controlling the position or movement of a scanning element or carriage, e.g. of a polygonal mirror, of a drive motor
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04753Control or error compensation of scanning position or velocity
    • H04N2201/04758Control or error compensation of scanning position or velocity by controlling the position of the scanned image area
    • H04N2201/0476Control or error compensation of scanning position or velocity by controlling the position of the scanned image area using an optical, electro-optical or acousto-optical element
    • H04N2201/04765Control or error compensation of scanning position or velocity by controlling the position of the scanned image area using an optical, electro-optical or acousto-optical element using a solid-state deflector, e.g. an acousto-optic deflector
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04753Control or error compensation of scanning position or velocity
    • H04N2201/04758Control or error compensation of scanning position or velocity by controlling the position of the scanned image area
    • H04N2201/04767Control or error compensation of scanning position or velocity by controlling the position of the scanned image area by controlling the timing of the signals, e.g. by controlling the frequency o phase of the pixel clock
    • H04N2201/04768Controlling the frequency of the signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04753Control or error compensation of scanning position or velocity
    • H04N2201/04789Control or error compensation of scanning position or velocity in the main-scan direction
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04753Control or error compensation of scanning position or velocity
    • H04N2201/04791Control or error compensation of scanning position or velocity in the sub-scan direction
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04753Control or error compensation of scanning position or velocity
    • H04N2201/04794Varying the control or compensation during the scan, e.g. using continuous feedback or from line to line
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04753Control or error compensation of scanning position or velocity
    • H04N2201/04794Varying the control or compensation during the scan, e.g. using continuous feedback or from line to line
    • H04N2201/04796Varying the sub-scan control during the main-scan, e.g. for correcting skew, tilt or bow of a scanning beam
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/047Detection, control or error compensation of scanning velocity or position
    • H04N2201/04753Control or error compensation of scanning position or velocity
    • H04N2201/04794Varying the control or compensation during the scan, e.g. using continuous feedback or from line to line
    • H04N2201/04798Varying the main-scan control during the main-scan, e.g. facet tracking

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Analogue/Digital Conversion (AREA)
  • Mechanical Optical Scanning Systems (AREA)
DE69126884T 1990-12-07 1991-12-06 Abtaststrahlkontrollsystem mit versetzter referenzskala Expired - Fee Related DE69126884T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/626,582 US5191447A (en) 1990-12-07 1990-12-07 Scanning beam control system with translated reference scale
PCT/US1991/009307 WO1992010903A1 (en) 1990-12-07 1991-12-06 Scanning beam control system with translated reference scale

Publications (2)

Publication Number Publication Date
DE69126884D1 DE69126884D1 (de) 1997-08-21
DE69126884T2 true DE69126884T2 (de) 1998-02-12

Family

ID=24511003

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69126884T Expired - Fee Related DE69126884T2 (de) 1990-12-07 1991-12-06 Abtaststrahlkontrollsystem mit versetzter referenzskala

Country Status (6)

Country Link
US (1) US5191447A (de)
EP (1) EP0560930B1 (de)
JP (1) JPH06503454A (de)
AT (1) ATE155630T1 (de)
DE (1) DE69126884T2 (de)
WO (1) WO1992010903A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04371068A (ja) * 1991-06-20 1992-12-24 Canon Inc 画像読取装置
US5587825A (en) * 1991-06-26 1996-12-24 Asahi Kogaku Kogyo Kabushiki Kaisha Scanning optical system
US6073846A (en) * 1994-08-17 2000-06-13 Metrologic Instruments, Inc. Holographic laser scanning system and process and apparatus and method
EP0713324A1 (de) * 1994-11-15 1996-05-22 Agfa-Gevaert N.V. Verfahren zur Vorbereitung von einer Lithographische Druckplatte
US6459444B1 (en) * 1997-09-10 2002-10-01 Fuji Photo Film Co., Ltd. Line-sequential recording method and apparatus thereof using stationary recording material
US6423925B1 (en) * 2000-02-17 2002-07-23 Universal Laser Systems, Inc. Apparatus and method for combining multiple laser beams in laser material processing systems
US6424670B1 (en) 2000-02-17 2002-07-23 Universal Laser Systems, Inc. Apparatus and method for making laser sources and laser platforms interchangeable and interfaceable

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3752558A (en) * 1971-06-28 1973-08-14 Decision Consultants Document scanner
US4447723A (en) * 1981-09-03 1984-05-08 Excellon Industries Scanning beam reference employing a retroreflective code means
US4832429A (en) * 1983-01-19 1989-05-23 T. R. Whitney Corporation Scanning imaging system and method
US4661699A (en) * 1983-03-28 1987-04-28 T. R. Whitney Corporation Scanning beam control system and method with bi-directional reference scale
US4584612A (en) * 1984-02-21 1986-04-22 Dainippon Screen Seizo Kabushiki Kaisha Picture recording method
JPS61118061A (ja) * 1984-11-14 1986-06-05 Toshiba Corp 画像形成装置
JPS62237865A (ja) * 1986-04-09 1987-10-17 Fuji Photo Film Co Ltd 光走査装置
JPS62299171A (ja) * 1986-06-18 1987-12-26 Fuji Photo Film Co Ltd 光ビ−ム走査装置
IL93327A (en) * 1986-10-07 1993-03-15 Scitex Corp Ltd Laser scanner
US4816920A (en) * 1986-11-18 1989-03-28 General Scanning, Inc. Planar surface scanning system
JPH07113705B2 (ja) * 1988-10-24 1995-12-06 大日本スクリーン製造株式会社 光ビーム走査装置
US4992890A (en) * 1989-03-17 1991-02-12 Intergraph Corporation System for plotting and scanning graphic images

Also Published As

Publication number Publication date
EP0560930A1 (de) 1993-09-22
EP0560930B1 (de) 1997-07-16
WO1992010903A1 (en) 1992-06-25
US5191447A (en) 1993-03-02
JPH06503454A (ja) 1994-04-14
ATE155630T1 (de) 1997-08-15
DE69126884D1 (de) 1997-08-21

Similar Documents

Publication Publication Date Title
DE9017720U1 (de)
DE68906274D1 (de) Vorrichtung zum abtasten einer datenflaeche mittels optischer strahlung.
DE3870097D1 (de) Optische abtastvorrichtung fuer transparentes bahnmaterial.
ATE29295T1 (de) Messeinrichtung.
DE69115347T2 (de) Laserabtastvorrichtung
KR890000913A (ko) 변배가능한 텔레센트릭 결상 광학계
ES2101409T3 (es) Dispositivo para fabricar una plantilla para impresion.
EP0263774A3 (de) Bildabtaster
DE69509039T2 (de) Verbesserung an einem in bezug auf ein gerat zum messen der krummung einer oberflache
ATE155630T1 (de) Abtaststrahlkontrollsystem mit versetzter referenzskala
DE8700520U1 (de)
WO1986004676A3 (fr) Dispositifs pour la determination optique d'erreurs de forme de faible importance
DE3671347D1 (de) Optoelektronischer abtastkopf.
DE59102890D1 (de) Positionsmesseinrichtung.
DE3463842D1 (en) Photoelectric length or angle measuring device
JPS6442624A (en) Light beam scanner
ATE202208T1 (de) Positionsmesseinrichtung
JPS6425529A (en) Wafer-pattern detecting apparatus
SE8900747D0 (sv) Hoejdmaetare saasom avkaennare foer dimidentifiering
SU1762449A1 (ru) Устройство для бесконтактного измерения поверхности стопы и голени
JPS5419760A (en) System for simultaneously scanning plural beams
JPS56147116A (en) Correction system for scanning light speed in laser recorder
JPS55153914A (en) Laser scanner
JPS6474405A (en) Method for measuring work gap at the time of arc welding
SU976292A1 (ru) Фотоэлектрическое устройство дл измерени поперечных перемещений предмета

Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: OPTRONICS INTERNATIONAL CORPORATION, CHELMSFORD, M

8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee