用干涉法隐藏安全全息图中的信息

IF 0.7 4区 物理与天体物理 Q4 OPTICS
Optica Applicata Pub Date : 2022-01-01 DOI:10.37190/oa220305
A. Sharma, Prashant Chauhan, A. Varshney
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引用次数: 1

摘要

本文提出了一种利用全息干涉技术在安全全息图中隐藏信息以提高防伪能力的新方法。只有通过密钥全息图产生的正确解码波前照亮安全全息图,才能模拟隐藏的信息。在解码过程中,在预定位置出现三个空间分离的焦点点,这些焦点点发散后,进一步产生带有隐藏信息调制的干涉条纹。当安全全息图完全对齐时,干涉条纹消失,隐藏的信息变得可见。通过这种技术进行编码的优点在于,使密钥和安全全息图的相对重新定位变得更加容易,同时也使验证系统的安全水平得到了成倍的提高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Concealing information in security hologram using interferometry
A new method utilizing holographic interferometry technique is described to conceal information in security holograms for enhancing their anti-counterfeiting ability. This concealed information can only be imitated if security hologram is illuminated through correct decoding wavefront generated through a key hologram. In decoding process, three spatially separated focus spots emerge at predefined positions which upon divergence further generate interferometric fringes modulated with concealed information in them. When security hologram is perfectly aligned, interferometric fringes disappear and concealed information becomes visible. The advantage of encoding through this technique lies in the fact that relative repositioning of key and security hologram becomes much easier and also additionally brings multifold improvement in the security level of the verification systems.
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来源期刊
Optica Applicata
Optica Applicata 物理-光学
CiteScore
1.00
自引率
16.70%
发文量
21
审稿时长
4 months
期刊介绍: Acoustooptics, atmospheric and ocean optics, atomic and molecular optics, coherence and statistical optics, biooptics, colorimetry, diffraction and gratings, ellipsometry and polarimetry, fiber optics and optical communication, Fourier optics, holography, integrated optics, lasers and their applications, light detectors, light and electron beams, light sources, liquid crystals, medical optics, metamaterials, microoptics, nonlinear optics, optical and electron microscopy, optical computing, optical design and fabrication, optical imaging, optical instrumentation, optical materials, optical measurements, optical modulation, optical properties of solids and thin films, optical sensing, optical systems and their elements, optical trapping, optometry, photoelasticity, photonic crystals, photonic crystal fibers, photonic devices, physical optics, quantum optics, slow and fast light, spectroscopy, storage and processing of optical information, ultrafast optics.
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