| Control device for quantity of light | |
| - | |
| 1981-08-24 | |
| 著作权人 | CANON KK |
| 专利号 | JP1981106259A |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Control device for quantity of light |
| 英文摘要 | PURPOSE:To raise service life of a light emitting device, to render use of a fast response light emitting device unnecessary, and to elevate economic effect, by gradually increasing current applied to said device to a described quantity of light, and maintaining its quantity to drive it. CONSTITUTION:Semiconductor laser generator 1 emits forward laser beams (front beams) L and at the same time emits backward back beams BB. Such back beams BB is received with light detection circuit 11, a detection signal formed in accordance with the beam intensity is applied to control circuit 12 to control beam emission intensity of generator In such a light equantity controller, current exceeding the necessary quantity is not supplied to the light emitting device, permitting service life of its device to be increased, and maximum value feedback type light quantity controller to be economically composed without using a fast response photodetector. |
| 公开日期 | 1981-08-24 |
| 申请日期 | 1980-01-25 |
| 状态 | 失效 |
| 内容类型 | 专利 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/59255]  |
| 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 | -. Control device for quantity of light. JP1981106259A. 1981-08-24. |
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