OPTICAL DIFFRACTION GRATING ELEMENT, AND OPTICAL PICK-UP DEVICE AND OPTICAL SCAN DEVICE THAT RESPECTIVELY COMPRISE OPTICAL DIFFRACTION GRATING ELEMENT,申请号CA19902013764-传众专利搜索

发明名称	OPTICAL DIFFRACTION GRATING ELEMENT, AND OPTICAL PICK-UP DEVICE AND OPTICAL SCAN DEVICE THAT RESPECTIVELY COMPRISE OPTICAL DIFFRACTION GRATING ELEMENT
摘要
申请公布号	CA2013764(A1)	申请公布日期	1990.10.04
申请号	CA19902013764	申请日期	1990.04.03
申请人	SHARP KABUSHIKI KAISHA	发明人	MIYAKE, TAKAHIRO;YOSHIDA, YOSHIO;KURATA, YUKIO
分类号	G02B5/18;G11B7/135	主分类号	G02B5/18
代理机构		代理人
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