Optical head for recording and erasure
文献类型：专利
| 作者 | UENO OSAMU; YASUKAWA KAORU; HOTTA HIROYUKI; GOTO HIRONORI |
| 发表日期 | 1988-04-09 |
| 专利号 | JP1988079241A |
| 著作权人 | FUJI XEROX CO LTD |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Optical head for recording and erasure |
| 英文摘要 | PURPOSE:To simplify the collimate adjustment by providing color aberration to a collimate lens of an optical head and returning a reflected light from an optical information medium to the laser in a specific rate with respect to the radiated luminous quantity of the semiconductor laser. CONSTITUTION:The optical information medium is formed by the semiconductor laser 1, the collimate lens 21, a polarized beam splitter 4, a 1/4 wavelength plate 5 and an objective lens 6. Color aberration is provided to the lens 21 and the optical axis of the wavelength plate 5 is adjusted so that the reflected light of the optical disk 7 is returned to the laser 1 in a rate >=0.1% on the basis of the radiated luminous quantity of the laser Thus, even if the distance between the laser 1 and the lens 21 is changed minutely, the wavelength of the radiated light is changed automatically by the self-focusing and the accuracy required for the collimate adjustment is relaxed. Thus, the collimate adjustment is simplified and a lens with a large aperture is used. |
| 公开日期 | 1988-04-09 |
| 申请日期 | 1986-09-22 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/59476]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | FUJI XEROX CO LTD |
| 推荐引用方式 GB/T 7714 | UENO OSAMU,YASUKAWA KAORU,HOTTA HIROYUKI,et al. Optical head for recording and erasure. JP1988079241A. 1988-04-09. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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