公开(公告)号：EP2232491A1

公开(公告)日：2010-09-29

申请号：EP08866998.1

申请日：2008-11-03

申请人： Samsung Electronics Co., Ltd.

发明人： BAE, Jae-Cheol ,  JEONG, Taek-Seong ,  KIM, Tae-Kyung ,  CHOI, Da-Hye

IPC分类号： G11B7/0065

CPC分类号： G11B7/00781 ,  G11B7/0065

摘要： A holographic information recording and/or reproducing apparatus including: a light source unit emitting reference light and signal light; a first optical path guiding unit guiding the lights to cross; a second optical path guiding unit including a first polarization converter located on an optical path of one of the reference and signal lights, a first polarization beam splitter located at a crossing point of the reference light and the signal light, an optical path converter guiding the reference light and the signal light so that they cross again, a second polarization converter located on an optical path of the signal light before the signal light crosses the reference light, and a second polarization beam splitter uniting the optical paths of the reference light and the signal light; and an objective lens unit illuminating the reference light and the signal light onto one side of a holographic information storage medium.