Semiconductor laser driving circuit

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	Semiconductor laser driving circuit
其他题名	Semiconductor laser driving circuit
	ASADA KENICHIRO
	1991-12-19
专利权人	RICOH CO LTD
公开日期	1991-12-19
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To hold the light emitting intensity of a semiconductor laser always at a constant level by successively switching plural constant current sources and controlling the current supply of respective constant current sources so that the detection output of the light emitting intensity of the semiconductor laser becomes a prescribed value. CONSTITUTION:The semiconductor laser driving circuit is provided with a detection means 16 for detecting the light emitting intensity of the semiconductor laser 10 and a current control means 4 for successively switching plural constant current sources A, B and controlling the current supply of respective current sources A, B. The means 16 detects the light emitting intensity of the laser 10 and supplies its detection output to the means 4. When the light emitting intensity of the laser 10 is changed in accordance with a change in peripheral temperature, the means 4 successively switches the sources A, B and controls the current supply of respective sources A, B so that respective detection outputs of the means 16 become respective prescribed values. Thus, the light emitting intensity of the laser 10 is held at the constant value.
其他摘要	用途：通过连续切换多个恒流源并控制各个恒流源的电流供应，使半导体激光器的发光强度始终保持在恒定水平，使半导体激光器的发光强度的检测输出变为规定值。组成：半导体激光器驱动电路设有一个检测装置16，用于检测半导体激光器10的发光强度，和一个电流控制装置4，用于连续切换多个恒流源A，B和控制各个电流源的电流供应装置16检测激光器10的发光强度并将其检测输出提供给装置4.当激光器10的发光强度根据外围温度的变化而改变时，装置4依次连接。切换源A，B并控制各个源A，B的电流供应，使得装置16的各个检测输出变为各自的规定值。因此，激光器10的发光强度保持在恒定值。
申请日期	1990-04-06
专利号	JP1991288870A
专利状态	失效
申请号	JP1990090419
公开（公告）号	JP1991288870A
IPC 分类号	B41J2/44 \| G03G15/04 \| H01S5/042 \| H04N1/04 \| H04N1/113 \| H04N1/23 \| H01S3/096
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/69101
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	ASADA KENICHIRO. Semiconductor laser driving circuit. JP1991288870A[P]. 1991-12-19.

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