Semiconductor laser control circuit
文献类型：专利
| 作者 | SAKURAI TATSUAKI |
| 发表日期 | 1990-06-11 |
| 专利号 | JP1990151173A |
| 著作权人 | RICOH CO LTD |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Semiconductor laser control circuit |
| 英文摘要 | PURPOSE:To attain the gradation control of multi-stage with excellent linearity without the occurrence of deficient luminous quantity or excess luminous quantity by adopting constant current source using a comparator, an up-down counter and a D/A converter so as to decide a drive current for a prescribed minimum optical intensity and a maximum overlap drive current for maximum luminous intensity. CONSTITUTION:A driving current (current stimulating a semiconductor laser 1 at a prescribed minimum luminous intensity Lmin) of a 1st constant current source 2 is controlled and decided by using a 1st feedback control loop 5 and an overlap driving current (current stimulating the semiconductor laser 1 at a prescribed maximum luminous intensity Lmax) of a 2nd constant current source 8 is controlled and decided by using a 2nd feedback control loop 6. The control operation by the 1st and 2nd feedback control loops 5, 6 as above is implemented between pages or between main scanning lines to stop the count of 1st and 2nd up-down counters 8, 12 during the write period thereby preserving the count at that time. |
| 公开日期 | 1990-06-11 |
| 申请日期 | 1988-12-02 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/69024]  |
| 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 | SAKURAI TATSUAKI. Semiconductor laser control circuit. JP1990151173A. 1990-06-11. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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