| Original document(55 pages) 中文版 |
An objective optical system for use in an optical pickup apparatus, comprises an aberration correcting element having at least two phase structures of a first and second phase structures; and a light converging element to converge the first light flux emitted from the aberration correcting element onto an information recording plane of the first optical disk and to converge the second light flux emitted from the aberration correcting element onto an information recording plane of the second optical disk; wherein the second phase structure refrains at least one of a change in the light converging characteristic of the objective optical system due to a change in the wavelength of the first light flux and a change in the light converging characteristic of the objective optical system due to a change in environmental temperature. |
Application Number
申请号 |
200580002264 |
Application Date
申请日 |
2005.03.09 |
| Title 名称 |
Objective optical system of optical pick-up, optical pick-up device and optical information recording/reproducing apparatus |
Publication Number
公开号 |
1910671 |
Publication Date
公开日 |
2007.02.07 |
| Approval Pub. Date |
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Granted Pub. Date |
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| International Classification 分类号 |
G11B7/135;G02B13/00;G02B13/18 |
Applicant(s) Name
申请人 |
Konica Minolta Opto Inc. |
| Address 地址 |
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| Inventor(s) Name 发明人 |
Nomura Eiji;Hashimura Junji;Kimura Tohru;Noguchi Kazutaka |
| Attorney & Agent 代理人 |
wang sibeng |
| More information 更 多 信 息 |
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