Optical disk apparatus for recording and reproducing ultra-high density signals
文献类型：专利
| 作者 | NISHIWAKI, SEIJI; UCHIDA, SHINJI; ASADA, JUNICHI |
| 发表日期 | 1992-10-27 |
| 专利号 | US5159650 |
| 著作权人 | MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Optical disk apparatus for recording and reproducing ultra-high density signals |
| 英文摘要 | PCT No. PCT/JP90/00843 Sec. 371 Date Feb. 21, 1991 Sec. 102(e) Date Feb. 21, 1991 PCT Filed Jun. 28, 1990 PCT Pub. No. WO91/00596 PCT Pub. Date Oct. 1, 199An optical disc apparatus includes an optical disk which satisfies the relationship of (Ascos phi s - 1) >/= -Ds(As2 - 2Ascos phi s + 1)2/4 lambda 2 or Ascos phi s = 1 where As, phi s are the amplitude reflectivity ratio and the phase difference between the regions within and out of a signal mark (27, 28) on a signal surface (16) of the optical disc, Ds is the area of the signal mark (27, 28) and lambda is the wavelength of a light source (8), and the light reflected from signal surface (16) is input-coupled by a grating coupler (4A, 4B) into a waveguide layer to propagate as wave-guided light (18A, 18B), radiated at the end of the wave-guiding layer (3A, 3B) and received by a light detector (6A, 6B) so that a control signal and a reproduced signal can be obtained from the detector. |
| 公开日期 | 1992-10-27 |
| 申请日期 | 1990-06-28 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/35988]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
| 推荐引用方式 GB/T 7714 | NISHIWAKI, SEIJI,UCHIDA, SHINJI,ASADA, JUNICHI. Optical disk apparatus for recording and reproducing ultra-high density signals. US5159650. 1992-10-27. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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