HK72689A - Off-axis light beam defect detector - Google Patents

Off-axis light beam defect detector

Info

Publication number
HK72689A
HK72689A HK726/89A HK72689A HK72689A HK 72689 A HK72689 A HK 72689A HK 726/89 A HK726/89 A HK 726/89A HK 72689 A HK72689 A HK 72689A HK 72689 A HK72689 A HK 72689A
Authority
HK
Hong Kong
Prior art keywords
light beam
lens
axis light
defect detector
scanned
Prior art date
Application number
HK726/89A
Other languages
English (en)
Inventor
Carlyle Jackson Eberly
Original Assignee
Discovision Ass
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23158782&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=HK72689(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Discovision Ass filed Critical Discovision Ass
Publication of HK72689A publication Critical patent/HK72689A/xx

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/9506—Optical discs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/55—Specular reflectivity

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Lasers (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Mechanical Optical Scanning Systems (AREA)
HK726/89A 1981-09-08 1989-09-07 Off-axis light beam defect detector HK72689A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/300,364 US4412743A (en) 1981-09-08 1981-09-08 Off-axis light beam defect detector

Publications (1)

Publication Number Publication Date
HK72689A true HK72689A (en) 1989-09-14

Family

ID=23158782

Family Applications (1)

Application Number Title Priority Date Filing Date
HK726/89A HK72689A (en) 1981-09-08 1989-09-07 Off-axis light beam defect detector

Country Status (8)

Country Link
US (1) US4412743A (ko)
EP (1) EP0074115B1 (ko)
JP (1) JPS58105443A (ko)
KR (1) KR890002318B1 (ko)
AT (1) ATE19311T1 (ko)
DE (1) DE3270640D1 (ko)
HK (1) HK72689A (ko)
SG (1) SG19389G (ko)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57161640A (en) * 1981-03-31 1982-10-05 Olympus Optical Co Ltd Inspecting device for surface
DE3503858A1 (de) * 1985-02-05 1986-08-21 Daimler-Benz Ag, 7000 Stuttgart Vorrichtung zur ermittlung von gestaltsfehlern niedriger ordnung
DE69021897T2 (de) * 1989-01-10 1996-02-29 Canon Kk Bilderzeugungsgerät.
US5504732A (en) * 1990-08-15 1996-04-02 Del Mar Avionics Null inflection detection and pulse expand latch in an optical recording system
GB9205655D0 (en) * 1992-03-14 1992-04-29 Roke Manor Research Improvements in or relating to surface curvature measurement
US5389794A (en) * 1992-11-25 1995-02-14 Qc Optics, Inc. Surface pit and mound detection and discrimination system and method
JPH07209202A (ja) * 1994-01-21 1995-08-11 Canon Inc 表面状態検査装置、該表面状態検査装置を備える露光装置及び該露光装置を用いてデバイスを製造する方法
US5978329A (en) * 1995-06-07 1999-11-02 Discovision Associates Technique for closed loop servo operation in optical disc tracking control
JPH09180417A (ja) * 1995-11-30 1997-07-11 Daewoo Electron Co Ltd ディスクプレーヤーのドライブシャーシの平坦度検査装置
EP0777218B1 (en) * 1995-12-06 2001-05-16 Discovision Associates Apparatus and method for focus control
US5689485A (en) * 1996-04-01 1997-11-18 Discovision Associates Tracking control apparatus and method
US6566674B1 (en) 1999-06-21 2003-05-20 Komag, Inc. Method and apparatus for inspecting substrates
US6548821B1 (en) 1999-06-21 2003-04-15 Komag, Inc. Method and apparatus for inspecting substrates
JP3460678B2 (ja) * 2000-06-02 2003-10-27 松下電器産業株式会社 レーザ加工方法および加工装置
JP2007193852A (ja) * 2004-03-30 2007-08-02 Pioneer Electronic Corp ホログラム記録担体
CN117419646B (zh) * 2023-12-19 2024-03-15 南京牧镭激光科技股份有限公司 一种基于激光传感器监测风机主轴位移的方法及系统

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5855567B2 (ja) * 1975-06-06 1983-12-10 株式会社日立製作所 ジヨウホウサイセイホウシキ
NL182990C (nl) * 1975-07-07 1988-06-16 Philips Nv Inrichting voor het uitlezen van een stralingsreflekterende registratiedrager.
US4030835A (en) * 1976-05-28 1977-06-21 Rca Corporation Defect detection system
JPS5439103A (en) * 1977-09-02 1979-03-26 Victor Co Of Japan Ltd Medium locator for fucus servo
NL7802860A (nl) * 1978-03-16 1979-09-18 Philips Nv Registratiedragerlichaam en registratiedrager voor optische informatie en inrichting voor het inschrijven en uitlezen.
US4332022A (en) * 1978-03-27 1982-05-25 Discovision Associates Tracking system and method for video disc player
JPS5625240A (en) * 1979-06-04 1981-03-11 Discovision Ass Method and device for recording data signal on recording medium
FR2483664B1 (fr) * 1980-05-28 1985-06-28 Thomson Csf Dispositif optique d'enregistrement-lecture sur un support d'informations et systeme de memoire optique comprenant un tel dispositif
US4357533A (en) * 1980-07-14 1982-11-02 Discovision Associates Focus detector for an optical disc playback system

Also Published As

Publication number Publication date
EP0074115A1 (en) 1983-03-16
DE3270640D1 (en) 1986-05-22
JPS58105443A (ja) 1983-06-23
SG19389G (en) 1989-09-29
EP0074115B1 (en) 1986-04-16
KR840001719A (ko) 1984-05-16
KR890002318B1 (ko) 1989-06-30
ATE19311T1 (de) 1986-05-15
US4412743A (en) 1983-11-01

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Legal Events

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PE Patent expired