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1. 发明申请

WO2008090103A8 APPARATUS AND METHOD FOR THE PRODUCTION OF A HOLOGRAM IN AN OPTICAL MEDIUM 审中-公开
标题翻译：装置及其制造方法全息光学介质
公开(公告)号：WO2008090103A8
公开(公告)日：2008-09-18
申请号：PCT/EP2008050601
申请日：2008-01-21
申请人： UNIV BERLIN TECH , ORLIC SUSANNA , DIETZ ENRICO , MUELLER CHRISTIAN
发明人： ORLIC SUSANNA , DIETZ ENRICO , MUELLER CHRISTIAN
IPC分类号： G11B7/0065 , G03H1/00 , G11B7/24 , G11B7/24044
CPC分类号： G03H1/30 , G03H2001/0417 , G03H2222/54 , G11B7/24044 , G11B7/26
摘要： The invention relates to a method and an apparatus for producing a hologram in an optical medium, especially for storing data in said optical medium. In said method, the hologram is generated in the optical medium by means of laser beams which are formed from a laser beam emitted by a free-running semiconductor laser, are irradiated onto the optical medium, and optionally extend in opposite directions while extending in such a way as to spatially overlap at least in part in the optical medium. In order to produce highly contrasting holograms by using inexpensive components, the reflective unit (15) is arranged such that the optical path (?x) between the focus of the laser beam in the storage medium (10) and the reflective surface of the reflective unit (15) in the area of the optical axis meets the following condition: ?x = 0.5 * ?s * a, wherein a is a natural number that is greater than or equal to 1, and ?s represents a distance between adjacent coherence centers of the laser beam generated by the semiconductor laser (16).
摘要翻译：本发明涉及一种方法和用于在光学介质中产生的全息图，尤其是用于在光学介质中存储数据的装置。在这个过程中，在通过激光束的装置，其中，所述激光束被从铸通过续流半导体激光束形成的光学介质中产生的全息图被照射到光学介质中，任选地在相反方向上，并至少部分地在所述光学介质延伸空间上重叠。为了生产使用便宜的部件具有高对比度的全息图，它是按照提供给安排在反射单元的本发明（15），使得光路长度（ΔX）（激光束的在所述存储介质（10）的焦点和所述反射单元的反射表面之间？15）在光轴的区域中，满足条件：X = 0.5 *满足s * A，其中A s是大于或等于1的自然数并且相邻相干性中心之间的距离（从半导体激光器16）产生的激光束？

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