| 发明名称 |
INFORMATION PROCESSING APPARATUS AND OPTICAL HEAD INCORPORATED THEREIN |
| 摘要 |
There is provided a compact and thin optical disk unit as a memory unit suitable for a portable computer such as a book type computer and a portable recording/reproducing apparatus. In the optical disk unit, the diameter of an objective lens (219) is limited and a beam shaping prism (216), a beam splitter (213), a mirror (217) and a 1/4 wavelength plate (215) are formed into a unitary structure to make easy the optical axis adjustment of an optical head (210) and ensure highly accurate assembling. <IMAGE> |
| 申请公布号 |
AU6779990(A) |
申请公布日期 |
1991.08.08 |
| 申请号 |
AU19900067799 |
申请日期 |
1990.12.06 |
| 申请人 |
HITACHI, LTD. |
发明人 |
NOBUYOSHI TSUBOI;YOSHIO SATO;HIROYUKI MINEMURA;HISASHI ANDOH;MASAICHI NAGAI;ISAO IKUTA;YOSHIMI KATOU;YOSHIHITO MAEDA;TATSUYA SUGITA;YUTAKA SUGITA |
| 分类号 |
G11B7/00;G11B7/0033;G11B7/004;G11B7/0055;G11B7/08;G11B7/12;G11B7/135;G11B7/24;G11B23/03 |
主分类号 |
G11B7/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
