| 发明名称 |
METHOD OF DETECTING POSITION FOR SETTING RECORDING DISC IN AN EQUIPMENT FOR OPTICAL REPRODUCING A RECORD AND RECORDING PLATE THEREFORE |
| 摘要 |
PURPOSE:To perform a high dense record by detecting the depth of a focus due to a difference in the quantity of light received on two receptor elements, said light being reflected from a recording disc to an objective lens. |
| 申请公布号 |
JPS5240151(A) |
申请公布日期 |
1977.03.28 |
| 申请号 |
JP19750116158 |
申请日期 |
1975.09.25 |
| 申请人 |
MATSUSHITA ELECTRIC IND CO LTD |
发明人 |
YOSHIDA TOMIO;DEGUCHI MASAHIRO;NAKADA AKIFUMI |
| 分类号 |
H04N5/85;G02B7/28;G02B27/00;G02B27/40;G11B7/08;G11B7/09;G11B7/24;G11C13/04;H04N5/84 |
主分类号 |
H04N5/85 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
