Flying type optical head integrally formed with light source and photodetector and optical disk apparatus with the same
文献类型：专利
| 作者 | SHIMANO, TAKESHI; ITO, KENCHI; MARUYAMA, YOOJI; AWANO, HIROYUKI |
| 发表日期 | 2003-08-26 |
| 专利号 | US6611487 |
| 著作权人 | HITACHI, LTD. |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Flying type optical head integrally formed with light source and photodetector and optical disk apparatus with the same |
| 英文摘要 | An optical head including a semiconductor laser source, a condenser lens, a photodiode for detecting a laser light emitter from said semiconductor laser source, and an optical coupler unit for collecting the laser light to the photodiode. A chromatic aberration W of condenser lens is satisfied by an expression W(h, NA)={(NA)3DELTAlambd/4lambd}h, where h is a height of incident light from an optical axis on a hologram, NA is a numerical aperture, DELTAlambd is a wavelength fluctuation, and a lambd is a wavelength at recording. The height h is determined so that the chromatic aberration W becomes equal to or less than lambd/4. |
| 公开日期 | 2003-08-26 |
| 申请日期 | 2002-08-02 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/33809]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | HITACHI, LTD. |
| 推荐引用方式 GB/T 7714 | SHIMANO, TAKESHI,ITO, KENCHI,MARUYAMA, YOOJI,et al. Flying type optical head integrally formed with light source and photodetector and optical disk apparatus with the same. US6611487. 2003-08-26. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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