发明申请
- 专利标题: Polarization element and optical device using polarization element
- 专利标题(中): 偏振元件和使用偏振元件的光学元件
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申请号: US11433233申请日: 2006-05-12
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公开(公告)号: US20060204163A1公开(公告)日: 2006-09-14
- 发明人: Kazuhiko Momoki , Keiji Ohtaka
- 申请人: Kazuhiko Momoki , Keiji Ohtaka
- 优先权: JP2004-139054 20040507; JP2004-149224 20040519
- 主分类号: G02B6/00
- IPC分类号: G02B6/00
摘要:
A high performance polarization splitting element and an optical device using the polarization splitting element are provided. According to an embodiment of the present invention, the optical device includes a first periodic structure having a period shorter than a wavelength of used light, a second periodic structure which has a period shorter than the wavelength of the used light and in which a direction of the period is orthogonal to or substantially orthogonal to that of the first periodic structure, and a pair of optical elements disposed so as to sandwich the first periodic structure and the second periodic structure. The second periodic structure is adjacent to the first periodic structure. The first periodic structure and the second periodic structure transmit light having first polarization direction and reflect light having second polarization direction orthogonal to the first direction, and the second polarization direction is substantially parallel to one of the periodic direction of the first periodic structure and the periodic direction of the second periodic structure.