Information processor
文献类型：专利
| 作者 | MAEDA TAKESHI; SUGIYAMA TOSHIO |
| 发表日期 | 1983-12-19 |
| 专利号 | JP1983218054A |
| 著作权人 | HITACHI LTD |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Information processor |
| 英文摘要 | PURPOSE:To obtain a simple and inexpensive information processor, by using a self-coupling effect of a semiconductor laser for detecting an information and automatic focusing error signal. CONSTITUTION:The amount of light from semiconductor lasers 1a, 1c is separated respectively by passing an output from a photodetector 10 through band pass filters 36, 37. The center frequency of the band pass filters 36, 37 is selected to fa, fc respectively. An automatic focusing error signal 33 is obtained by inputting an output of the band pass filters 36, 37 to a differential amplifier 34. The signal 33 is inputted to a compensating circuit 35 of the servo system and an output of the compensation circuit 35 is inputted to a drive circuit 38 of a voice coil (electromagnetic element shifting an objective lens 5 in the direction of optical axis), allowing to attain automatic focusing by moving the voice coil 3 Further, the output from the photodetector 10 is given to a band pass filter 39 (center freuqnecy fb) to read out the information signal recorded on a disc and the signal is inputted to a signal processing circuit. |
| 公开日期 | 1983-12-19 |
| 申请日期 | 1983-06-03 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/62887]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | HITACHI LTD |
| 推荐引用方式 GB/T 7714 | MAEDA TAKESHI,SUGIYAMA TOSHIO. Information processor. JP1983218054A. 1983-12-19. |
入库方式： OAI收割
来源：西安光学精密机械研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。