发明名称 |
Optical pick-up apparatus and optical recording/reproducing apparatus using the same |
摘要 |
An optical pickup apparatus that can adaptive for a plurality types of optical discs different in the layout condition such as a recording density, etc. and an optical recording/reproducing apparatus employing the optical pickup apparatus. In the optical pickup apparatus, first and second light sources generate a different wavelength of light beams. An optical system allows a light beam generated from any one of the first and second light sources to be selectively irradiated onto the optical disc and have an aperture number controller allowing the number of aperture of a light beam to have a different value. A photo detector detects the light beam reflected from the optical disc to be accessed to convert the same into an electrical signal. The apparatus is capable of accessing three types of optical discs different in the layout condition by utilizing an appropriate combination of a wavelength of the light beam with the number of aperture. |
申请公布号 |
US6449235(B1) |
申请公布日期 |
2002.09.10 |
申请号 |
US19990285436 |
申请日期 |
1999.04.02 |
申请人 |
LG ELECTRONICS, INC. |
发明人 |
KIM JIN YONG;JEONG SEONG YUN |
分类号 |
G11B7/00;G11B7/125;G11B7/135;G11B7/24;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/00 |
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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