JPS55108937A - Optical recording and reproducing device - Google Patents
Optical recording and reproducing deviceInfo
- Publication number
- JPS55108937A JPS55108937A JP1336279A JP1336279A JPS55108937A JP S55108937 A JPS55108937 A JP S55108937A JP 1336279 A JP1336279 A JP 1336279A JP 1336279 A JP1336279 A JP 1336279A JP S55108937 A JPS55108937 A JP S55108937A
- Authority
- JP
- Japan
- Prior art keywords
- light beam
- defective part
- optical disc
- recording
- point
- 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.)
- Pending
Links
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE: To prevent burst errors from being generated, by detecting optically an optical disc surface defective part before the irradiation point of a recording light beam and by performing control so that information may be recorded with the surface defective part avoided.
CONSTITUTION: Defect detection means 60 on an optical disc consists of light generator 30 to generate light beam 15 having comparatively weak energy, lens 31 to project this light beam 15 as needle-shaped light beam 16, half mirror 32 to refract the reflection light from point 26 as beam 17 to the lens 33 side, and photo detector 34. Photo detector 34 discriminates existence of the defective part at point 26, which is spaced l away before irradiation point 25 of recording light beam 12, and controls recording operations so that information may be prevented from being recording on the defective part of the optical disc. Consequently, burst errors based on the defective part of the optical disc can be avoided without considerable difficulty.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1336279A JPS55108937A (en) | 1979-02-09 | 1979-02-09 | Optical recording and reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1336279A JPS55108937A (en) | 1979-02-09 | 1979-02-09 | Optical recording and reproducing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55108937A true JPS55108937A (en) | 1980-08-21 |
Family
ID=11830978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1336279A Pending JPS55108937A (en) | 1979-02-09 | 1979-02-09 | Optical recording and reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55108937A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56165264A (en) * | 1980-05-23 | 1981-12-18 | Yuasa Battery Co Ltd | Manufacture of battery |
JPS63209048A (en) * | 1987-02-26 | 1988-08-30 | Matsushita Electric Ind Co Ltd | Magneto-optical disk control method |
JPH076447A (en) * | 1993-07-28 | 1995-01-10 | Olympus Optical Co Ltd | Magneto-optical recording and reproducing device |
US7261854B2 (en) | 2003-02-19 | 2007-08-28 | Denso Corporation | Insert molding technique |
-
1979
- 1979-02-09 JP JP1336279A patent/JPS55108937A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56165264A (en) * | 1980-05-23 | 1981-12-18 | Yuasa Battery Co Ltd | Manufacture of battery |
JPS63209048A (en) * | 1987-02-26 | 1988-08-30 | Matsushita Electric Ind Co Ltd | Magneto-optical disk control method |
JPH076447A (en) * | 1993-07-28 | 1995-01-10 | Olympus Optical Co Ltd | Magneto-optical recording and reproducing device |
US7261854B2 (en) | 2003-02-19 | 2007-08-28 | Denso Corporation | Insert molding technique |
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