光ヘッドおよび情報記録装置
文献类型：专利
| 作者 | 中村 滋; 有本 昭; 仲尾 武司; 梅田 麻理子 |
| 发表日期 | 1998-12-11 |
| 专利号 | JP2861449B2 |
| 著作权人 | 株式会社日立製作所 |
| 国家 | 日本 |
| 文献子类 | 授权发明 |
| 其他题名 | 光ヘッドおよび情報記録装置 |
| 英文摘要 | PURPOSE:To obtain a small and integral optical head by closing a semiconductor laser in an optical head case to fix an image forming optical system, a diffraction grating to separate reflecting and incident beam, a beam separating optical system and a photodetector. CONSTITUTION:An optical head includes a semiconductor 1, a diffraction grating plate 2 of a double refraction substance, a lambda/4 plate 5, a focus lens 6, tripartite photodetectors 7A and 7B, a photodetector 8 for the power monitor of the laser 1 and an arithmetic circuit 9 of a photodetector output signal. A diffraction grating 3 is on the surface of the laser 1 side of the plate 2 and a diffraction grating 4 is on the surface of the lens 6 side. An emitting beam 14 from the laser 1 is the grating 4 and separated into main and subbeams 15a and 15b, 15c. The beams 15a-15c are reflected by the optical disk, a reflecting beam 16 to pass through the lambda/4 plate 5 is separated into beams 17A and 17B by the grating 3 and detected by the 3-divided type photodector 7A and 7B. The photodetectors 7A and 7B, the photodetector 8 for power monitor, an electronic circuit 9 are fixed onto a circular substrate 1 |
| 公开日期 | 1999-02-24 |
| 申请日期 | 1991-04-10 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/33374]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | 株式会社日立製作所 |
| 推荐引用方式 GB/T 7714 | 中村 滋,有本 昭,仲尾 武司,等. 光ヘッドおよび情報記録装置. JP2861449B2. 1998-12-11. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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