Laser device circuit
文献类型：专利
| 作者 | INUYAMA SATOHIKO |
| 发表日期 | 1989-08-18 |
| 专利号 | JP1989206680A |
| 著作权人 | キヤノン株式会社 |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Laser device circuit |
| 英文摘要 | PURPOSE:To obtain a cheap device able to control a semiconductor laser very accurately and safely in an emitting light volume with a small number of bits by a method wherein a bias current of the semiconductor laser is digitally controlled by a potential supplied from a power source different in polarity through a transistor grounded to a base. CONSTITUTION:A CPU 1 is equipped with a built-in A/D converter, and a light emitting current ID and a bias current IB of a semiconductor laser LD are controlled by regulating the drive of a driving and constant current circuit 3 of a constant current circuit 15 through the control ot an input BX of a specified number of bits to the A/D converter 2 and an input DX of a specified number of bits to a D/A converter 17. The constant current circuit 15 drives a light volume signal detected by a light volume detecting section 11 through an output potential from the D/A converter 17 to control the light emitting current ID so as to make an emitting light volume of the semiconductor laser LD reach a target value previously preset. By these processes, an emitting light volume of the semiconductor laser LD can be controlled to be a target value through only the input DX of a specified number of bits from the CPU 1 to the D/A converter 17. |
| 公开日期 | 1989-08-18 |
| 申请日期 | 1988-02-15 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/59557]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | キヤノン株式会社 |
| 推荐引用方式 GB/T 7714 | INUYAMA SATOHIKO. Laser device circuit. JP1989206680A. 1989-08-18. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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