Optical recording and reproducing device with semiconductor laser as light source
文献类型：专利
| 作者 | NAKADA AKIFUMI; YOSHIDA TOMIO; SATOU TOSHIO; HARIKAE SHIYUNJI; NAGASHIMA MICHIYOSHI |
| 发表日期 | 1980-08-21 |
| 专利号 | JP1980108943A |
| 著作权人 | MATSUSHITA ELECTRIC IND CO LTD |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Optical recording and reproducing device with semiconductor laser as light source |
| 英文摘要 | PURPOSE:To shorten a light path length to make an optical sytem small-size and improve transfer efficiency of a light, by using two cylindrical lenses to convert the light from a laser light source, which has a plane luminous face, to a parallel light. CONSTITUTION:The sectional form of the light beam on the luminous face of a semiconductor laser is generally plane in relation to its junction face. When only the light at the center of this plane luminous face is condensed, transfer efficiency is lowered to several %, and a required light path length is long. The emission light from semiconductor laser 11 is converted to a parallel light of an approximately round section between concave cylindrical lens 14 and convex cylindrical lens 15 and is condensed to a small beam diameter on disc 19 by condenser lens 18. By this constitution, the light path length of the condensation optical system can be shortened considerably to make the unit small-size, and light transfer efficiency of the light beam can be improved up to 40-50% or more. |
| 公开日期 | 1980-08-21 |
| 申请日期 | 1979-02-13 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/59248]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | MATSUSHITA ELECTRIC IND CO LTD |
| 推荐引用方式 GB/T 7714 | NAKADA AKIFUMI,YOSHIDA TOMIO,SATOU TOSHIO,et al. Optical recording and reproducing device with semiconductor laser as light source. JP1980108943A. 1980-08-21. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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