JPS57203233A - Optical recorder and reproducer - Google Patents

Optical recorder and reproducer

Info

Publication number
JPS57203233A
JPS57203233A JP57080448A JP8044882A JPS57203233A JP S57203233 A JPS57203233 A JP S57203233A JP 57080448 A JP57080448 A JP 57080448A JP 8044882 A JP8044882 A JP 8044882A JP S57203233 A JPS57203233 A JP S57203233A
Authority
JP
Japan
Prior art keywords
light
recording medium
light source
spot
minute spot
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.)
Granted
Application number
JP57080448A
Other languages
Japanese (ja)
Other versions
JPH0127489B2 (en
Inventor
Shunji Harikae
Tomio Yoshida
Akifumi Nakada
Mitsuro Moriya
Toshio Sato
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP57080448A priority Critical patent/JPS57203233A/en
Publication of JPS57203233A publication Critical patent/JPS57203233A/en
Publication of JPH0127489B2 publication Critical patent/JPH0127489B2/ja
Granted legal-status Critical Current

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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

PURPOSE:To attain a low output, by performing optical modulation with a low output oscillation through the use of a small-sized laser light source as a signal recording light source and providing an optical path of the light source to obtain signals for reproduction and control so that the amount of light of laser light source can not be lost. CONSTITUTION:A light beam (a) from a light source 2 is made incident to the center of an aperture lens 5 and a minute spot light P is formed on a recording medium 6. A means for recording information on the recording medium 6 with the spot light P, and a means which makes a light beam (b) from a light source 10 incident to a position shifted toward the information track from the center of the lens 5, forms a minute spot light Q on the recording medium 6, detects a reflected light (c) from the recording medium 6 for the spot light Q through the provision of both the light sources 2 and 10 so that both the spot lights Q and P are on the same information track of the recording medium 6 and the minute spot light P is preceding to the spot Q, and obtains a reproduced signal from the recording medium 6, are provided. A sognal recorded on the recording medium 6 with the minute spot light P is monitored with a minute spot light Q.
JP57080448A 1982-05-12 1982-05-12 Optical recorder and reproducer Granted JPS57203233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57080448A JPS57203233A (en) 1982-05-12 1982-05-12 Optical recorder and reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57080448A JPS57203233A (en) 1982-05-12 1982-05-12 Optical recorder and reproducer

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP9320977A Division JPS5427406A (en) 1977-08-02 1977-08-02 Optical recorder-reproducer

Publications (2)

Publication Number Publication Date
JPS57203233A true JPS57203233A (en) 1982-12-13
JPH0127489B2 JPH0127489B2 (en) 1989-05-29

Family

ID=13718537

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57080448A Granted JPS57203233A (en) 1982-05-12 1982-05-12 Optical recorder and reproducer

Country Status (1)

Country Link
JP (1) JPS57203233A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004047096A1 (en) * 2002-11-20 2004-06-03 Sony Corporation Method for producing stamper used for producing optical disc and optical disc producing method
CN100409335C (en) * 2003-01-09 2008-08-06 索尼株式会社 Method for producing stamper used for producing optical disc and optical disc producing method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51109851A (en) * 1975-03-24 1976-09-29 Japan Broadcasting Corp
JPS5223308A (en) * 1975-08-15 1977-02-22 Sony Corp Data recording medium manufacturing process
JPS539101A (en) * 1976-07-12 1978-01-27 Mitsubishi Electric Corp Recording device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51109851A (en) * 1975-03-24 1976-09-29 Japan Broadcasting Corp
JPS5223308A (en) * 1975-08-15 1977-02-22 Sony Corp Data recording medium manufacturing process
JPS539101A (en) * 1976-07-12 1978-01-27 Mitsubishi Electric Corp Recording device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004047096A1 (en) * 2002-11-20 2004-06-03 Sony Corporation Method for producing stamper used for producing optical disc and optical disc producing method
EP1564734A1 (en) * 2002-11-20 2005-08-17 Sony Corporation Method for producing stamper used for producing optical disc and optical disc producing method
EP1564734A4 (en) * 2002-11-20 2007-10-31 Sony Corp Method for producing stamper used for producing optical disc and optical disc producing method
US7648671B2 (en) 2002-11-20 2010-01-19 Sony Corporation Method of making master for manufacturing optical disc and method of manufacturing optical disc
CN100409335C (en) * 2003-01-09 2008-08-06 索尼株式会社 Method for producing stamper used for producing optical disc and optical disc producing method
US8119043B2 (en) 2003-01-09 2012-02-21 Sony Corporation Method of making master for manufacturing optical disc and method of manufacturing optical disc

Also Published As

Publication number Publication date
JPH0127489B2 (en) 1989-05-29

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