发明名称 |
OPTICAL HEAD |
摘要 |
An optical head for optical recording and reproducing system comprising a light source, a first optical means for introducing a light beam from the light source into a guide groove formed in a recording surface of an information carrier, and a second optical means for separating a reflected light beam reflected from the guide groove from the light beam from the light source. The optical head also comprises an optical element having formed thereon at its center a cylindrical surface and on both sides slanted surfaces for dividing the reflected light beam into three, and a light receiving element having at least three light receiving units for receiving the respective light beams divided into three by the optical element. |
申请公布号 |
CA1302562(C) |
申请公布日期 |
1992.06.02 |
申请号 |
CA19870553454 |
申请日期 |
1987.12.03 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
IMAI, HITOSHI;ARAI, RYUICHIRO;KOYANAGI, KIMIYUKI;TADOKORO, MICHIHIRO |
分类号 |
G02B7/28;G11B7/09;G11B7/12 |
主分类号 |
G02B7/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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