Control system for light emitting device
文献类型：专利
| 作者 | CALL, DAVID ERNEST; LEWKOWICZ, JULIAN |
| 发表日期 | 1994-12-28 |
| 专利号 | EP0467616B1 |
| 著作权人 | INTERNATIONAL BUSINESS MACHINES CORPORATION |
| 国家 | 欧洲专利局 |
| 文献子类 | 授权发明 |
| 其他题名 | Control system for light emitting device |
| 英文摘要 | The present invention relates to a control system for a light emitting device (14) comprising a control circuit (15) for controlling the emission of light from the device, a digital to analog converter (23) for generating analog signals for supplying to the control circuit (15) in order to control the intensity of the emitted light, means (20) for supplying digital signals to the digital to analog convertor in accordance with the required intensity of the emitted light, and calibrating means for calibrating the control system to account for variations in the parameters or the operational state of the system. According to the invention the control system is characterised in that the calibration means comprises means (20) for varying the digital signals supplied to the convertor until the intensity of the light emitted from the device is at a first, minimum level and storing the value of the digital signals as a first digital value, means (20) for varying the digital signals supplied to said convertor until the intensity of the light emitted from the device is at a second, maximum level and storing the value of the digital signals as a second digital value, and calculating means (20) for calculating from the stored digital values the change of light intensity (E) represented by a unit change of digital signal value. |
| 公开日期 | 1994-12-28 |
| 申请日期 | 1991-07-15 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/33381]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | INTERNATIONAL BUSINESS MACHINES CORPORATION |
| 推荐引用方式 GB/T 7714 | CALL, DAVID ERNEST,LEWKOWICZ, JULIAN. Control system for light emitting device. EP0467616B1. 1994-12-28. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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