Optical recording device
文献类型：专利
| 作者 | KIMIZUKA JIYUNICHI |
| 发表日期 | 1984-10-08 |
| 专利号 | JP1984177738A |
| 著作权人 | CANON KK |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Optical recording device |
| 英文摘要 | PURPOSE:To prevent a light emitting means from careless damaging and to prevent fast deterioration by detecting the quantity of light from the light emitting means, and stopping the light emitting operation of the light emitting means when the detecting level exceeds a prescribed value. CONSTITUTION:The inverted optical recording device modulates laser light projected from a semiconductor laser 1 by switching laser injection current I in accordance with a video signal supplied to a terminal 5 by a laser driving circuit 4. A photodetecting element 2 receives the laser light, detects the output level, and when the detected signal reaches a reference voltage VREF previously setp up to a level value obtained when the limited quantity of light is made incident to the photodetecting element 2, an output is obtained from a comparator 9. The output is extended by a mono-stable multivibrator 11, and during the extended prescribed period, an inverted output of the multivibrator 11 is supplied to an AND circuit 6 and also supplied to a light emitting diode 15 through an inverter 14. Consequently, the driving of the semiconductor laser 1 is precisely stopped and the lighting of the light emitting diode 15 can be precisely observed. |
| 公开日期 | 1984-10-08 |
| 申请日期 | 1983-03-28 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/59320]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | CANON KK |
| 推荐引用方式 GB/T 7714 | KIMIZUKA JIYUNICHI. Optical recording device. JP1984177738A. 1984-10-08. |
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。