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    • 71. 发明专利
    • Diffraction element for optical pickup and optical module equipped with this diffraction element
    • 光学元件的衍射元件和配有该衍射元件的光学模块
    • JP2011192372A
    • 2011-09-29
    • JP2010089043
    • 2010-04-07
    • Lms Co Ltd株式会社エルエムエス
    • JEONG BYEONG MOOJUNG KYUNG HO
    • G11B7/135G02B5/18
    • G02B5/1814G11B7/1353G11B7/22
    • PROBLEM TO BE SOLVED: To provide a diffraction element in which a mark pattern for alignment confirmation is formed to facilitate confirmation of an accurate installation of the diffraction element, and an optical module equipped with the diffraction element. SOLUTION: The diffraction element is a diffraction element in which a plurality of diffraction patterns are formed. The diffraction patterns include main diffraction patterns that give diffraction characteristics and mark patterns for alignment position recognition whose pitch is different in size from the pitch of the main diffraction patterns. In the diffraction element, the pitch of the mark patterns is formed so that it is smaller than that of the main diffraction patterns. In the diffraction element, the ratio of the pitch of the mark patterns to the pitch of the main diffraction patterns is 1/8 to 1/2 inclusive. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供一种衍射元件,其中形成用于对准确认的标记图案以便于确认衍射元件的精确安装,以及配备有衍射元件的光学模块。 解决方案:衍射元件是其中形成多个衍射图案的衍射元件。 衍射图案包括给出衍射特性的主要衍射图案和用于对准位置识别的标记图案,其间距在尺寸上与主衍射图案的间距不同。 在衍射元件中,标记图案的间距形成为小于主衍射图案的间距。 在衍射元件中,标记图案的间距与主衍射图案的间距的比率为1/8至1/2(含)。 版权所有(C)2011,JPO&INPIT