发明名称 |
Optical pickup apparatus, optical elements, and objective lens |
摘要 |
<p>An optical pickup apparatus for a first optical medium including a first transparent base plate having a thickness of t1 and a second optical medium including a second transparent base plate having a thickness of t2 (t2>t1), comprises a first light source (11) to emit a first light flux having a wavelength of »1; a second light source (12) to emit a second light flux having a wavelength of »2 (»1 < »2); a converging optical system (3) having an objective lens and a diffracting section and to converge the first light flux or the second light flux onto the first optical medium or the second optical medium; and an optical detector. When the converging optical system converges the second light flux onto the second information recording surface so as to conduct reproducing and/or recording the information of the second optical information recording medium, a spherical aberration has at least one discontinuous portion or at least one substantially discontinuous portion.</p> |
申请公布号 |
EP1102251(A2) |
申请公布日期 |
2001.05.23 |
申请号 |
EP20000310147 |
申请日期 |
2000.11.15 |
申请人 |
KONICA MINOLTA OPTO, INC. |
发明人 |
ARAI, NORIKAZU;KOJIMA, TOSHIYUKI;OTA, KOHEI |
分类号 |
G11B7/00;G11B7/125;G11B7/135;(IPC1-7):G11B7/135 |
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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