基本信息:
- 专利标题： 光位相制御装置、光位相制御方法、光情報記録再生装置、及び光情報記録再生方法
- 专利标题（英）：JPWO2016208047A1 - Optical phase control device, optical phase control method, an optical information recording and reproducing apparatus, and an optical information recording and reproducing method
- 申请号：JP2017524535 申请日：2015-06-26
- 公开(公告)号：JPWO2016208047A1 公开(公告)日：2017-10-05
- 发明人： 誠 保坂 , 誠 保坂 , 利樹 石井 , 利樹 石井 , 和良 山崎 , 和良 山崎
- 申请人： 株式会社日立製作所
- 申请人地址： 東京都千代田区丸の内一丁目6番6号
- 专利权人： 株式会社日立製作所
- 当前专利权人： 株式会社日立製作所
- 当前专利权人地址： 東京都千代田区丸の内一丁目6番6号
- 代理人： 特許業務法人湘洋内外特許事務所
- 优先权： JP2015068441 2015-06-26
- 主分类号： G02F1/01
- IPC分类号： G02F1/01 ; G02F1/13 ; G03H1/04 ; G11B7/0065 ; G11B7/135
It was difficult in the apparatus using the conventional nematic liquid crystal or ferroelectric liquid crystal, to provide an apparatus and method having a function of changing only the fast phase of light without changing the polarization.
Switch the fast axis in at least two directions, the switching of the first retardation adding unit providing a first retardation between fast axis and the slow axis of the incident light, the fast axis in at least two directions, It includes a second retardation adding unit providing a second retardation, and the fast axis control unit that the orientation of the fast axis of the first retardation adding unit and the second retardation adding unit for controlling each of the first retardation adding unit and the second retardation adding unit is disposed to overlap, first the fast axis control unit controls each of the fast axis of the first retardation adding unit and the second retardation adding unit in a desired orientation control state or the second control state for controlling the fast axis of the first retardation adding unit and the second retardation adding unit to the orientation different from the first control state To select one or the other.