公开(公告)号：US20100061214A1

公开(公告)日：2010-03-11

申请号：US12523891

申请日：2008-01-20

Applicant: Susanna Orlic ,  Enrico Dietz ,  Christian Mueller

Inventor： Susanna Orlic ,  Enrico Dietz ,  Christian Mueller

IPC: G11B7/00

CPC classification number: G03H1/30 ,  G03H2001/0417 ,  G03H2222/54 ,  G11B7/24044 ,  G11B7/26

Abstract: The invention relates to a method and a device for producing a hologram in an optical medium, particularly for storing data in the optical medium. In the method, the hologram is produced in the optical medium using laser beams, wherein the laser beams are formed from a laser beam emitted by a free-running semiconductor laser, are directed onto the optical medium, optionally contradirectionally, and at least partially spatially overlap in the optical medium. For producing holograms using inexpensive components with a high contrast, the invention provides for arranging the reflection unit (15) such that the optical path length (Δx) between the focus of the laser beam in the storage medium (10) and the reflecting surface of the reflection unit (15) satisfies the condition Δx=0.5*Δs*a in the region of the optical axis, wherein a is a natural number greater than or equal to 1 and Δs is a distance between neighboring coherence centers of the laser beam produced by the semiconductor laser (16).

Abstract translation: 本发明涉及一种用于在光学介质中制造全息图的方法和装置，特别是用于在光学介质中存储数据。 在该方法中，使用激光束在光学介质中产生全息图，其中激光束由自由运行的半导体激光器发射的激光束形成，可选择地相互导向并至少部分地在光学介质上 在光学介质中重叠。 为了使用具有高对比度的廉价组件来生产全息图，本发明提供了布置反射单元（15），使得存储介质（10）中的激光束的焦点与反射器之间的光程长度（＆Dgr; x） 反射单元（15）的表面在光轴的区域中满足条件＆Dgr; x = 0.5 *＆Dgr; s * a，其中a是大于或等于1的自然数，＆Dgr; s是 由半导体激光器（16）产生的激光束的相邻相干中心。