Optical modulation in optical recording accompanied by wavelength conversion

OPT OpenIR > 半导体激光器专利数据库

	Optical modulation in optical recording accompanied by wavelength conversion
其他题名	Optical modulation in optical recording accompanied by wavelength conversion
	OKAZAKI YOJI; KAMIYAMA KOJI
	1990-04-24
专利权人	FUJI PHOTO FILM CO LTD
公开日期	1990-04-24
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To enable a high gradation image to be recorded at high speed by a method wherein a minimum drive current is established at a value slightly larger than threshold current, and a semiconductor laser beam is directly modulated. CONSTITUTION:For a light emission level command signal Vref by a table 12 and D/A converter 13, one among values of dividing a space between a minimum value Vref1 and a maximum value Vref2 at an equal interval is so set as to be taken according to an image signal S Then, the minimum value Vref1, i.e., a value for giving minimum drive current Imin to a semiconductor laser 17 is so established that a value slightly larger than threshold current Ith is taken as the minimum drive current Imin. Therefore, even though natural emission light is included in a light beam 18 incident to an optical wavelength conversion element 30, since a wavelength of the light beam 18 is not converted and is cut with a filter 24, intensity of a light beam 18'' emitted from the light wavelength conversion element 30 basically corresponds to only intensity of a laser beam emitted from the semiconductor laser 17.
其他摘要	目的：通过一种方法能够高速记录高灰度图像，其中最小驱动电流建立在略大于阈值电流的值，并且直接调制半导体激光束。组成：对于表12和D / A转换器13的发光水平指令信号Vref，在等间隔划分最小值Vref1和最大值Vref2之间的空间的值之一被设置为根据图像信号S1。然后，确定最小值Vref1，即用于给半导体激光器17提供最小驱动电流Imin的值，使得略大于阈值电流Ith的值作为最小驱动电流Imin。因此，即使在入射到光波长转换元件30的光束18中包括自然发射光，由于光束18的波长未被转换并且被滤光器24切割，因此光束18''的强度从光波长转换元件30发射的光基本上仅对应于从半导体激光器17发射的激光束的强度。
主权项	-
申请日期	1988-10-20
专利号	JP1990111568A
专利状态	失效
申请号	JP1988265140
公开（公告）号	JP1990111568A
IPC 分类号	B41J2/44 \| G11B7/125 \| H01S5/06 \| H01S3/103
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/181661/59588
专题	半导体激光器专利数据库
作者单位	FUJI PHOTO FILM CO LTD
推荐引用方式 GB/T 7714	OKAZAKI YOJI,KAMIYAMA KOJI. Optical modulation in optical recording accompanied by wavelength conversion. JP1990111568A[P]. 1990-04-24.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
JP1990111568A.PDF（241KB）	专利		开放获取	CC BY-NC-SA	请求全文