Laser driving device

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	Laser driving device
其他题名	Laser driving device
	SATO KOJI; GOTO MASAHIRO; NAKAZAWA NOBUO; SASAME HIROSHI; SUZUKI AKIO; INOUE TAKAHIRO; ASAI ATSUSHI; MURASAWA YOSHIHIRO; SAITO TETSUO
	1986-11-15
专利权人	CANON INC
公开日期	1986-11-15
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To enable a semiconductor laser to adjust the amount of emitted light without any risk of breakdown, by providing a control means for regulating the output of the semiconductor laser, and a limiting means for limiting the regulatable range of the control means. CONSTITUTION:A semiconductor laser LD is modulated by an external signal inputted to a buffer circuit More particularly, when a high-level signal is inputted into the buffer circuit 1, the buffer circuit 1 emits a low-level output, whereby a transistor Tr1 is turned OFF and a transistor Tr2 gets continuity. The semiconductor laser LD changes its amount of light according to current I flowing therethrough, and the current I flowing through the semiconductor laser LD is adjusted by a constant-current circuit C. A differential amplifier 2 compares a set value in a volume VR1 and a value of voltage which is obtained by converting the current I flowing through the laser LD by means of a resistance R. The semiconductor laser LD is thus always driven with constant current. According to this construction, the semiconductor laser can be regulated without any risk of breakdown.
其他摘要	目的：通过提供用于调节半导体激光器输出的控制装置，以及限制控制装置可调节范围的限制装置，使半导体激光器能够调节发光量而没有任何击穿风险。组成：半导体激光器LD由输入到缓冲电路1的外部信号调制。更具体地说，当高电平信号输入到缓冲电路1时，缓冲电路1发出低电平输出，从而晶体管Tr1截止，晶体管Tr2导通。半导体激光器LD根据流过其中的电流I改变其光量，并且通过恒流电路C调节流过半导体激光器LD的电流I.差分放大器2比较体积VR1中的设定值和通过利用电阻R转换流过激光器LD的电流I而获得的电压值。因此，半导体激光器LD总是以恒定电流驱动。根据这种结构，可以调节半导体激光器而没有任何击穿的风险。
申请日期	1985-05-11
专利号	JP1986258486A
专利状态	失效
申请号	JP1985100199
公开（公告）号	JP1986258486A
IPC 分类号	H04N1/113 \| B41J2/44 \| G03G15/04 \| H01S5/042 \| H01S5/06 \| H01S3/103 \| H04N1/04
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/181661/68786
专题	半导体激光器专利数据库
作者单位	CANON INC
推荐引用方式 GB/T 7714	SATO KOJI,GOTO MASAHIRO,NAKAZAWA NOBUO,et al. Laser driving device. JP1986258486A[P]. 1986-11-15.

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