Optical pickup device
文献类型：专利
| 作者 | NISHIMOTO, MASAHIKO; NAKANISHI, NAOKI; ONO, MASAYUKI |
| 发表日期 | 2009-05-19 |
| 专利号 | US7535814 |
| 著作权人 | PANNOVA SEMIC, LLC |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Optical pickup device |
| 英文摘要 | An optical pickup device includes a diffraction grating for separating a light beam from a semiconductor laser into at least three light beams. The diffraction grating is partitioned into five areas each having a given periodic structure: a first area; a second area adjacent to the first area in a first direction; a third area adjacent to the first and second areas in a second direction; a fourth area sandwiching the third area with the first area; and a fifth area adjacent to the fourth area in the first direction and sandwiching the third area with the second area. The phase of the periodic structure of each of the first and fifth areas is ahead of that of the third area by substantially 90°. The phase of the periodic structure of each of the second and fourth areas is behind that of the third area by substantially 90°. |
| 公开日期 | 2009-05-19 |
| 申请日期 | 2007-02-12 |
| 状态 | 授权 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/32635]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | PANNOVA SEMIC, LLC |
| 推荐引用方式 GB/T 7714 | NISHIMOTO, MASAHIKO,NAKANISHI, NAOKI,ONO, MASAYUKI. Optical pickup device. US7535814. 2009-05-19. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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