Semiconductor laser control circuit
文献类型：专利
| 作者 | SHIMADA, KAZUYUKI; SHIBATA, ISAMU |
| 发表日期 | 1989-08-08 |
| 专利号 | US4856011 |
| 著作权人 | RICOH COMPANY, LTD. |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Semiconductor laser control circuit |
| 英文摘要 | A system for controlling the operation of a semiconductor laser is provided. In one aspect of the present invention, a switching element, which is turned on and off in accordance with a signal modulated with image information, is connected in series with the semiconductor laser for controlling the operation thereof. In another aspect of the present invention, a semiconductor laser control system includes a photodetector for detecting the intensity of a laser beam emitted from the laser, a comparator for comparing the detected intensity with a predetermined refence intensity, an up/down counter which changes its count depending on the result of the comparison at the comparator, and a laser driver which supplies a driving current to the laser as modified by the count of the counter. A reset circuit is provided to reset the counter when at least the laser driver is powered up with a predetermined supply voltage. In addition, the laser driver is so structured that the supply of the driving current to the laser is disconnected for a predetermined time period after the power up thereof. |
| 公开日期 | 1989-08-08 |
| 申请日期 | 1988-11-08 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/33328]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | RICOH COMPANY, LTD. |
| 推荐引用方式 GB/T 7714 | SHIMADA, KAZUYUKI,SHIBATA, ISAMU. Semiconductor laser control circuit. US4856011. 1989-08-08. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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