首页>
外国专利>
Making use of holography making use of the optical pickup and the optical information reproducing arrangement and optical information record
Making use of holography making use of the optical pickup and the optical information reproducing arrangement and optical information record
展开▼
机译:利用全息术,利用光学头和光学信息再现装置以及光学信息记录
展开▼
页面导航
摘要
著录项
相似文献
摘要
In holographic recording, it is important to form stably an interference fringe between a reference beam and a signal beam in a holographic storage medium. To suppress factors degrading stability of the interference fringe, such as fluctuation of atmospheric air, position displacement of optical components and the like during propagation of the reference and signal beams, an optical pickup and an optical information recording/reproducing apparatus adopt an optical system structure providing a higher proportion of optical components shared by the reference and signal beams optical path than conventional optical system structure. To increase the proportion of shared optical components, the signal beam and the reference beam pass through the PBS prism as parallel beams and a concave lens is placed on a reference beam path just before the objective lens.
展开▼