JPS57203233A - Optical recorder and reproducer - Google Patents
Optical recorder and reproducerInfo
- 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
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.
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)
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)
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 |
-
1982
- 1982-05-12 JP JP57080448A patent/JPS57203233A/en active Granted
Patent Citations (3)
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)
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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