发明名称 |
Aparelho captor óptico capaz de ler dados independente do tipo de disco |
摘要 |
<p>An improved optical pick-up apparatus capable of reading data irrespective of disc type capable of reading various kinds of discs having different thicknesses and writing densities using only one pick-up apparatus, which includes a light source; a beam splitter for passing through or splitting a beam from the light source; an objective lens for condensing the beam onto corresponding disc among discs having different thicknesses and different densities; a numerical aperture control unit for controlling an effective numerical aperture of the objective lens so as to execute a focussing operation with respect to a certain disc; and a photo-detector for receiving the beam reflected by the disc and transmitted from the beam splitter. <IMAGE></p> |
申请公布号 |
BR9506104(A) |
申请公布日期 |
1997.12.23 |
申请号 |
BR19959506104 |
申请日期 |
1995.12.27 |
申请人 |
LG ELECTRONICS INC. |
发明人 |
JIN-YONG KIM;DAE-YOUNG KIM;MAN-HYUNG LEE;SONG-CHAN PARK;IN-SANG SONG |
分类号 |
G11B7/00;G11B7/0037;G11B7/004;G11B7/09;G11B7/12;G11B7/135;G11B7/22;G11B19/12;(IPC1-7):G11B7/08 |
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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