Noise reduction system for optical record and reproduction apparatus using auto-power controlled semiconductor laser device
文献类型：专利
| 作者 | TAGUCHI, TOYOKI; SUGAYA, TOSHIHIRO; YAMADA, HISASHI; SHIMURA, KEI; HOSHINO, ISAO; TANAKA, MASAHIKO; MURAKAMI, TERUO; SATOH, HIROHARU; KOBORI, HIROMICHI; FUJIMOTO, SADANARI |
| 发表日期 | 1995-12-12 |
| 专利号 | US5475210 |
| 著作权人 | KABUSHIKI KAISHA TOSHIBA |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Noise reduction system for optical record and reproduction apparatus using auto-power controlled semiconductor laser device |
| 英文摘要 | An optical disk apparatus includes a semiconductor laser for emitting a light beam, and an automatic power control or APC circuit for driving the laser. A compound prism structure is optically coupled to the laser in an optical head section, and defines a first optical path for causing a front laser light to be projected onto a rotating optical disk and guiding a reflected light therefrom toward a first photodetector, and a second optical path for guiding a part of the reflected light toward a second photodetector. An output signal of the first photodetector is used to generate a reproduced information signal. An output signal of the second photodetector is fed back to the APC circuit as a front light monitor signal. A part of a laser control signal internally generated in the APC circuit is supplied through a wiring line to a noise reduction circuit as a laser noise monitor signal. The noise reduction circuit subtracts this noise monitor signal from the reproduced information signal to provide a noise-suppressed information signal. |
| 公开日期 | 1995-12-12 |
| 申请日期 | 1993-06-08 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/35017]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | KABUSHIKI KAISHA TOSHIBA |
| 推荐引用方式 GB/T 7714 | TAGUCHI, TOYOKI,SUGAYA, TOSHIHIRO,YAMADA, HISASHI,et al. Noise reduction system for optical record and reproduction apparatus using auto-power controlled semiconductor laser device. US5475210. 1995-12-12. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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