JPS6417228A - Recording/reproducing device for optical recording medium - Google Patents
Recording/reproducing device for optical recording mediumInfo
- Publication number
- JPS6417228A JPS6417228A JP62172580A JP17258087A JPS6417228A JP S6417228 A JPS6417228 A JP S6417228A JP 62172580 A JP62172580 A JP 62172580A JP 17258087 A JP17258087 A JP 17258087A JP S6417228 A JPS6417228 A JP S6417228A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- servo
- reproducing
- dichroic mirror
- light source
- 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)
- Optical Head (AREA)
Abstract
PURPOSE:To execute a stabilized servo without differing largely a servo gain at a recording and reproducing times by making one part of a light source of two light sources of different wavelengths each other as that for obtaining a servo signal. CONSTITUTION:The laser beam of a wavelength lambda1 emitted from a recording/ reproducing light source 11 is reflected by a dichroic mirror 14 and projected on the part where the recording/reproducing of an optical card 1 are performed. This reflection light is reflected by the dichroic mirror 14 and fed to an optical detector 17. The laser beam in a wavelength lambda3 emitted from the light source 21 for servo is passed through the dichroic mirror 14 and projected on the part where the recording/reproducing of the optical card 1 are executed. This reflection light is passed through the dichroic mirror 14 and fed to the optical detector 25 for servo. The amplitude of the modulation signal to be reproduced can be thus made larger, the difference in the servo gain prior to recording the data and that after recording the data is reduced as well and a stabilized servo can be exerted at both recording and reproducing times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62172580A JPS6417228A (en) | 1987-07-10 | 1987-07-10 | Recording/reproducing device for optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62172580A JPS6417228A (en) | 1987-07-10 | 1987-07-10 | Recording/reproducing device for optical recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6417228A true JPS6417228A (en) | 1989-01-20 |
Family
ID=15944478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62172580A Pending JPS6417228A (en) | 1987-07-10 | 1987-07-10 | Recording/reproducing device for optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6417228A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02226526A (en) * | 1989-02-27 | 1990-09-10 | Kyocera Corp | Optical head |
| WO2006019052A1 (en) * | 2004-08-20 | 2006-02-23 | Pioneer Corporation | Optical pickup device, and information recording and reproduction device |
| JP2007200427A (en) * | 2006-01-25 | 2007-08-09 | Ricoh Co Ltd | Multilayer optical information recording medium, optical head, and optical drive device |
| US7940628B2 (en) | 2005-12-02 | 2011-05-10 | Ricoh Company, Ltd. | Multilayer optical information recording medium, optical head, and optical drive |
-
1987
- 1987-07-10 JP JP62172580A patent/JPS6417228A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02226526A (en) * | 1989-02-27 | 1990-09-10 | Kyocera Corp | Optical head |
| WO2006019052A1 (en) * | 2004-08-20 | 2006-02-23 | Pioneer Corporation | Optical pickup device, and information recording and reproduction device |
| US7940628B2 (en) | 2005-12-02 | 2011-05-10 | Ricoh Company, Ltd. | Multilayer optical information recording medium, optical head, and optical drive |
| JP2007200427A (en) * | 2006-01-25 | 2007-08-09 | Ricoh Co Ltd | Multilayer optical information recording medium, optical head, and optical drive device |
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