Optical information reproducing device, optical information recording medium, cutting device and semiconductor laser light source

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	Optical information reproducing device, optical information recording medium, cutting device and semiconductor laser light source
其他题名	Optical information reproducing device, optical information recording medium, cutting device and semiconductor laser light source
	ONISHI KUNIKAZU; SATO YASUHIRO; KATASE YOSHIHIRO; MIURA MICHIO
	1990-05-11
专利权人	HITACHI LTD
公开日期	1990-05-11
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To improve recording density by forming several types of bits, in which the length-wise direction is different, on an optical disk, discriminating these bits at the time of reproduction and obtaining a signal. CONSTITUTION:On an optical disk 6, at least 3 types of a bit 30 in which in accordance with the recording signal of two multiplexed systems, a lengthwise direction is inclined approximately to + or -45 deg. and 0 deg. for a bit string are formed. Out of respective beams to reflect the disk 6, one side light flux to transmit a half mirror 4' is separated to a P deflecting component and an S deflecting component by a polarization beam splitter 3' and made incident on light detectors 8a and 8b respectively. The output signal from respective detectors 8a and 8b is reproduced through reproducing signal detecting circuits 60a and 60b provided in order to output the recording signal of two independent systems as a digital signal as recording signals A and B of two independent systems. Thus, since the information signal of plural independent systems can be multiplexed and recorded, the recording density can be improved.
其他摘要	目的：通过在光盘上形成几种类型的位来改善记录密度，其中长度方向不同，在再现时区分这些位并获得信号。组成：在光盘6上，至少3种类型的位30，其中根据两个多路复用系统的记录信号，长度方向倾斜大约+或-45度。和0度形成一个字符串。在用于反射光盘6的各个光束中，用于透射半反射镜4'的一侧光通量被偏振分束器3'分离成P偏转分量和S偏转分量，并分别入射到光检测器8a和8b上。。来自各个检测器8a和8b的输出信号通过再现信号检测电路60a和60b再现，以便输出两个独立系统的记录信号作为数字信号作为两个独立系统的记录信号A和B.因此，由于可以多路复用和记录多个独立系统的信息信号，所以可以提高记录密度。
主权项	-
申请日期	1988-11-02
专利号	JP1990123523A
专利状态	失效
申请号	JP1988278372
公开（公告）号	JP1990123523A
IPC 分类号	G11B7/00 \| G11B7/004 \| G11B7/125 \| G11B7/24 \| H01S5/00 \| H01S3/18
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/181661/59591
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	ONISHI KUNIKAZU,SATO YASUHIRO,KATASE YOSHIHIRO,et al. Optical information reproducing device, optical information recording medium, cutting device and semiconductor laser light source. JP1990123523A[P]. 1990-05-11.

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