Optical output controller

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	Optical output controller
其他题名	Optical output controller
	IMADA RITSUO; ONISHI KUNIKAZU; INOUE MASAYUKI
	1990-07-24
专利权人	HITACHI LTD
公开日期	1990-07-24
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To contrive the increase of the function of an optical disk device with a simple constitution by receiving the output beams of two pieces of laser elements of an optical disk irradiation semiconductor laser by one piece of photodetector and controlling the element, and controlling the oscillation stop of one element. CONSTITUTION:Spot light beams 31, 32 are formed in a disk 30 by semiconductor laser elements 1, 2 opposed at the minute interval of an optical head 20, a reflected light is demodulated and inputted to a system control circuit 15, a switching circuit 12 is controlled, and at the time of reproduction of an address area continued from the servo-area of each sector of the disk 30, the switch 12 is turned off. Subsequently, through a photodetector 3 of the element 1, an output is processed by a sample-hold circuit 5, and a comparator 8 to which a reference value is added, and the element is brought to negative feedback control. In a subsequent address area section, the circuit 12 is turned on by the circuit 15 and the element 2 is reoscillated, the output of the element 2 by a differential amplifier 6 is processed in the same way and the element 2 is brought to negative feedback control, and a disk device is allowed to have a multi-function such as overwrite and a verifying function by the simple constitution of only one piece of photodetector.
其他摘要	目的：通过一个光电探测器接收光盘辐射半导体激光器的两个激光元件的输出光束并控制该元件，并控制振荡，以简单的结构来设计光盘装置功能的增加。停止一个元素。组成：点光束31,32由半导体激光元件1,2形成在盘30中，半导体激光元件1,2以光学头20的微小间隔相对，反射光被解调并输入到系统控制电路15，开关电路12控制，并且在从盘30的每个扇区的伺服区域继续的地址区域的再现时，开关12被关闭。随后，通过元件1的光电探测器3，通过采样保持电路5和添加了参考值的比较器8处理输出，并使该元件进行负反馈控制。在随后的地址区域部分中，电路12由电路15接通并且元件2被重新调整，差分放大器6的元件2的输出以相同的方式处理并且元件2被带到负反馈。通过仅一个光电探测器的简单构造，允许磁盘设备具有诸如重写和验证功能的多功能。
主权项	-
申请日期	1989-01-13
专利号	JP1990187934A
专利状态	失效
申请号	JP1989004958
公开（公告）号	JP1990187934A
IPC 分类号	G11B7/125 \| H01S5/042 \| 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/181661/59608
专题	半导体激光器专利数据库
作者单位	HITACHI LTD
推荐引用方式 GB/T 7714	IMADA RITSUO,ONISHI KUNIKAZU,INOUE MASAYUKI. Optical output controller. JP1990187934A[P]. 1990-07-24.

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