发明名称 |
Multi-beam optical recording/reproducing apparatus for recording/reproducing on a medium having a recording flat part with a guide groove on each side |
摘要 |
An optical recording/reproducing apparatus wherein a main beam is converged and projected onto a flat part between tracking guide groove parts adjacent to each other in an optical recording medium to record, reproduce or erase information, two sub-beams on both sides of the main beam are respectively converged and projected so as to cover the guide groove parts to form a tracking system for controlling tracking and one of the two sub-beams is utilized to discriminate the flat part.
|
申请公布号 |
US5132953(A) |
申请公布日期 |
1992.07.21 |
申请号 |
US19900597271 |
申请日期 |
1990.10.15 |
申请人 |
OLYMPUS OPTICAL CO., LTD. |
发明人 |
MATSUBAYASHI, NOBUHIDE |
分类号 |
G11B7/013;G11B7/09;G11B11/105 |
主分类号 |
G11B7/013 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|