发明授权
- 专利标题： Diffractive optical element
- 专利标题（中）： 衍射光学元件
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申请号： US161744申请日： 1998-09-29
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公开(公告)号： US6088160A公开(公告)日： 2000-07-11
- 发明人: Yoshimitsu Nomura , Masaaki Fukuda , Takashi Ito , Kaneyoshi Yagi
- 申请人： Yoshimitsu Nomura , Masaaki Fukuda , Takashi Ito , Kaneyoshi Yagi
- 申请人地址： JPX Saitama
- 专利权人： Fuji Photo Optical Co., Ltd.
- 当前专利权人： Fuji Photo Optical Co., Ltd.
- 当前专利权人地址： JPX Saitama
- 优先权： JPX9-271261 19971003
- 主分类号： G02B5/00
- IPC分类号： G02B5/00 ; G02B5/18 ; G02B7/02
摘要：
A diffractive optical element includes an optically functioning part including a diffraction grating and a flange part disposed around the optically functioning part. On an outer circumferential face of the flange part, there are at least three protrusions at respective different locations. The protrusions project outward from the outer circumferential face.
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