HK18291A - Video recorder-playback machine - Google Patents

Video recorder-playback machine

Info

Publication number
HK18291A
HK18291A HK182/91A HK18291A HK18291A HK 18291 A HK18291 A HK 18291A HK 182/91 A HK182/91 A HK 182/91A HK 18291 A HK18291 A HK 18291A HK 18291 A HK18291 A HK 18291A
Authority
HK
Hong Kong
Prior art keywords
pour
lumière
faisceau
moyen
ledit
Prior art date
Application number
HK182/91A
Other languages
German (de)
English (en)
Inventor
Richard L. Wilkinson
George Vitale
Original Assignee
Discovision Associates
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 Discovision Associates filed Critical Discovision Associates
Publication of HK18291A publication Critical patent/HK18291A/en

Links

Classifications

    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
    • 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
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers

Landscapes

  • Optics & Photonics (AREA)
  • Physics & Mathematics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Traffic Control Systems (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Microscoopes, Condenser (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Television Signal Processing For Recording (AREA)
  • Vending Machines For Individual Products (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Holo Graphy (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Claims (3)

1. A recorder-playback machine for recording and playing back information from an information storage disc, comprising: a "write" laser (16), secured to a machine base and operative to generate a first light beam directed along a first path (11) for use in recording information upon the disc (14); a "read" laser (80) operative to generate a second light beam directed along a second path for use in recovering information from the disc (14); means (18) for supporting the disc for rotation; an optical record-playback head (34) for focusing said first and second beams upon said disc; optical means (32, 53) for directing said first and second light beams through said head toward said disc; means (38) for moving said head being mounted on a carriage radially with respect to said disc (14) generally in parallel with a portion (28, 11, 32) of said first path; modulator means (17) positioned along said first path upstream of said head for interrupting said first light beam to produce a modulated light beam representative of the information to be recorded; said optical means (32) including means (53) for directing said second light beam through said head for focusing of said second light beam by said head upon the disc at a point slightly downstream from the point of focus of said first light beam; and a first light responsive means (77) along said second path responsive to said second light beam, after being reflected from the disc along said second path of said read laser, for generating an electrical signal used in playing back the information from the disc, and for monitoring the recording characterized by the "read" laser (80) being mounted on said carriage
- said modulator means (17) comprising means (24) for splitting said first light beam into said modulated light beam for passage along said first path (11), and an auxiliary light beam comprising the complement of said modulated light beam (11) and directed out of said first path along a third path (9);
- a second light responsive means (94) along said third path for generating an electrical signal in response to said auxiliary light beam for use in monitoring the characteristics of said modulated light beam;
- comparator means (98) for comparing the electrical signal generated by said second light responsive means (94) along said third path with the electrical signal generated by said first light responsive means (77) along said second path.
2. A recorder-playback machine as set forth in claim 1, characterized in that said means for splitting said beam comprises means (24) for diffracting said light beam issuing from said modulator, the diffracted beam portion defining said auxiliary light beam.
3. A recorder-playback machine as set forth in claim 1, characterized in that said modulator means (17) comprises an acousto-optic modulator (24).
HK182/91A 1980-10-20 1991-03-14 Video recorder-playback machine HK18291A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19869380A 1980-10-20 1980-10-20

Publications (1)

Publication Number Publication Date
HK18291A true HK18291A (en) 1991-03-22

Family

ID=22734403

Family Applications (1)

Application Number Title Priority Date Filing Date
HK182/91A HK18291A (en) 1980-10-20 1991-03-14 Video recorder-playback machine

Country Status (12)

Country Link
EP (3) EP0050366B1 (fr)
JP (3) JPS5771534A (fr)
KR (1) KR850001382B1 (fr)
AT (1) ATE28767T1 (fr)
AU (1) AU537421B2 (fr)
BR (1) BR8104924A (fr)
CA (1) CA1159150A (fr)
DE (1) DE3176346D1 (fr)
ES (1) ES8301564A1 (fr)
HK (1) HK18291A (fr)
MX (1) MX149812A (fr)
NO (1) NO163718C (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488277A (en) * 1982-02-10 1984-12-11 North American Philips Corporation Control system for an optical data recording apparatus
JPS6171472A (ja) * 1984-09-14 1986-04-12 Pioneer Electronic Corp 記録デイスク演奏装置
CN1326607C (zh) * 2004-04-05 2007-07-18 中国科学院生态环境研究中心 过渡金属取代型六铝酸盐天然气燃烧催化剂的制备工艺

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3860766A (en) * 1972-05-31 1975-01-14 Tokyo Shibaura Electric Co Optical signal reproducing apparatus
JPS51109851A (fr) * 1975-03-24 1976-09-29 Japan Broadcasting Corp
NL178283C (nl) * 1975-08-28 1986-02-17 Philips Nv Afspeelinrichting, in het bijzonder videospeler.
JPS52119952A (en) * 1976-04-02 1977-10-07 Canon Inc Signal recorder using acousto/optic light modulator
GB1581551A (en) * 1976-08-24 1980-12-17 Atomic Energy Authority Uk Image reproduction systems
FR2419932A2 (fr) * 1978-03-17 1979-10-12 Roussel Uclaf Nouveaux esters d'acides cyclopropane carboxyliques comportant un substituant polyhalogene, procede de preparation et compositions insecticides les renfermant
US4145758A (en) * 1977-10-25 1979-03-20 Drexler Technology Corporation Error checking method and apparatus for digital data in optical recording systems
NL7801870A (nl) * 1978-02-20 1979-08-22 Philips Nv Optische platenspeler.
US4180822A (en) * 1978-04-13 1979-12-25 Rca Corporation Optical scanner and recorder
US4213158A (en) * 1978-06-28 1980-07-15 Xerox Corporation Optical data recording system utilizing acoustic pulse imaging to minimize image blur
GB2033132A (en) * 1978-11-02 1980-05-14 Mca Disco Vision Recording and playback
FR2462758A1 (fr) * 1979-08-03 1981-02-13 Thomson Csf Dispositif optique d'acces a une piste portee par un support d'information et systeme de memoire optique comportant un tel dispositif
US4337538A (en) * 1980-10-20 1982-06-29 Discovision Associates Drive assembly for a video recorder-playback machine
US4339814A (en) * 1980-10-20 1982-07-13 Discovision Associates Spindle assembly for a video recorder-playback machine

Also Published As

Publication number Publication date
EP0181427A2 (fr) 1986-05-21
ATE28767T1 (de) 1987-08-15
EP0181427A3 (en) 1986-08-13
AU537421B2 (en) 1984-06-21
EP0181428A3 (en) 1986-08-13
KR850001382B1 (ko) 1985-09-24
BR8104924A (pt) 1982-08-31
DE3176346D1 (en) 1987-09-10
CA1159150A (fr) 1983-12-20
JPS62229544A (ja) 1987-10-08
JPS62229543A (ja) 1987-10-08
JPS5771534A (en) 1982-05-04
EP0181428A2 (fr) 1986-05-21
EP0050366A1 (fr) 1982-04-28
MX149812A (es) 1983-12-26
ES504179A0 (es) 1982-12-01
EP0050366B1 (fr) 1987-08-05
ES8301564A1 (es) 1982-12-01
NO163718C (no) 1990-07-04
NO163718B (no) 1990-03-26
JPS6226099B2 (fr) 1987-06-06
NO812079L (no) 1982-04-21
AU7247881A (en) 1982-04-29

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Legal Events

Date Code Title Description
PE Patent expired