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Optoelectronic Device for Reading of Hidden Magnetic Information from the Holograms

机译：用于从全息图读取隐藏的磁信息的光电设备

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摘要

The model of the device of reading (visualization) of the hidden magnetic information from the holograms combined with magneto-optical layer is presented in the article.rnWays of magnetic images formation on the protected documentation and their reading by magneto-optical methods are proposed. The reading head with the help of magneto-optical meridional Kerr effect allows to observe visually of "effect of blinking" from the hologram with the hidden magnetic layer. During the work the mathematical analysis magneto-optical Kerr or Faraday effects was carried out. The hidden magnetic image based on: 1. hard magnetic layer on basis Tb-Fe with perpendicular anisotropy; 2. soft magnetic layers on a basis or permalloy. Advantages of the device: 3. non contact reading of the magnetic information; 4. difficulty of recurrence of magnetic images formation technology. The optical scheme of devices contains a light source, the polarizer, the analyzer, the hologram with magneto-optic layers, and constant magnet. The hologram is placed between the polarizer and the analyzer.
机译：本文提出了一种结合全息图结合磁光层的全息图隐藏信息的读取（可视化）装置的模型。提出了在受保护文献上形成磁像的方法以及利用磁光方法进行读取的方法。借助磁光子午线Kerr效应的读取头，可以从带有隐藏磁性层的全息图中目视观察“闪烁效果”。在工作期间，进行了磁光克尔或法拉第效应的数学分析。隐藏的磁性图像基于：1.基于垂直各向异性的Tb-Fe硬磁层； 2.基础或坡莫合金的软磁性层。该设备的优点：3.非接触式读取磁信息； 4.磁性成像技术难于复发。设备的光学方案包括一个光源，偏振器，检偏器，带有磁光层的全息图和恒定磁体。全息图放置在偏振器和检偏器之间。

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