| Original document(17 pages) 中文版 |
Light emitted from a light source (5) is reflected by the reflection film of a polarized beam-splitter (6), passes through collimating lens (7) and a mirror (8) to reach a convergence lens (9). The convergence lens (9) forms a light spot on an information medium (1) having a visual information layer (4). Reflected light which is reflected by the visual information layer (4) passes through the convergence lens (9), the mirror (8), and the collimating lens (7), transmits through the reflection film of the polarized beam-splitter (6), passes through a half mirror (14) to reach a second light detector (13). The second light detector (13) detects an FE signal for the visual information layer (4) and feeds back the detected signal to an LPC circuit, thereby restricting power fluctuation due to surface deflection. |
Application Number
申请号 |
200580002455 |
Application Date
申请日 |
2005.04.14 |
| Title 名称 |
Information processing device |
Publication Number
公开号 |
1910661 |
Publication Date
公开日 |
2007.02.07 |
| Approval Pub. Date |
|
Granted Pub. Date |
|
| International Classification 分类号 |
G11B7/0045;G11B7/125;G11B7/24;G11B23/40 |
Applicant(s) Name
申请人 |
Matsushita Electric Ind Co., Ltd. |
| Address 地址 |
|
| Inventor(s) Name 发明人 |
Kayama Hiroshi;Momoo Kazuo;Takahashi Yuuichi |
| Attorney & Agent 代理人 |
wang yang |
| More information 更 多 信 息 |
|
|
|