Multigradation output control apparatus of laser diode
文献类型：专利
| 作者 | SENMA TOSHITAKA |
| 发表日期 | 1990-05-29 |
| 专利号 | JP1990139260A |
| 著作权人 | RICOH CO LTD |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Multigradation output control apparatus of laser diode |
| 英文摘要 | PURPOSE:To write a multigradation image at a low cost without bringing about a lowering of resolving power by forming an electronic latent image changed in potential for every pixel by controlling the beam output of a laser diode corresponding to the variable density of each pixel. CONSTITUTION:When the beam output of a laser diode is excessive at the starting time of operation, since VM becomes larger than Vref (VM>Vref) and the output of a comparator 10 is 'H', a U/D counter 11 becoming an enable state counts up its content at every clock and the level control signal outputted from an APC circuit 5 increases and the control current IC outputted from an operator 7 also increases while the drive current IL outputted from an LD driver 1 is reduced and the beam output of the laser diode 2 is also reduced. If the beam output of the laser diode 2 is insufficient at the starting time of operation, since VM becomes lower than Vref (VM |
| 公开日期 | 1990-05-29 |
| 申请日期 | 1988-11-21 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/59597]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | RICOH CO LTD |
| 推荐引用方式 GB/T 7714 | SENMA TOSHITAKA. Multigradation output control apparatus of laser diode. JP1990139260A. 1990-05-29. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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