Kinoform syntesis as an improved method to form a concealed image in optical security devices
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Kinoform syntesis as an improved method to form a concealed image in optical security devices
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| Creator |
Braginets, E.V.
Girnyk, V.I. Kostyukevych, S.A. Kurashov, V.N. Soroka, A.A. Moskalenko, N. |
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| Description |
It is well known that one of the basic functions of security holograms is the maximal complication of their non-authorized reproduction, in other words – counterfeiting. To solve the problem, concealed images that can be observed only under special conditions are placed into a structure of the hologram. A popular way to place concealed image in Diffractive Optically Variable Image Device (DOVID) is integration into DOVID's structure of a Concealed Laser-Readable Image (CLRI). Traditionally CLRI is a 2D Computer-Generated Hologram (2D CGH), which is a digitized Interference Fringe Data (IFD) structure, computed under the scheme of Fourier-hologram synthesis. Such hologram provides inspection of the second level with portable laser reading devices. While it is being read, two (+/– 1 order of diffraction) identical images are formed. It is very interesting to achieve a CGH, which restores the image only in one diffractive order or two different images in +1 and –1 orders of diffraction.
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| Date |
2017-06-15T03:48:16Z
2017-06-15T03:48:16Z 2006 |
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| Type |
Article
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| Identifier |
Kinoform syntesis as an improved method to form a concealed image in optical security devices / E.V. Braginets, V.I. Girnyk, S.A. Kostyukevych, V.N. Kurashov, N. Moskalenko, A.A. Soroka // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2006. — Т. 9, № 4. — С. 85-90. — Бібліогр.: 19 назв. — англ.
1560-8034 PACS 42.40.Jv http://dspace.nbuv.gov.ua/handle/123456789/121642 |
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| Language |
en
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| Relation |
Semiconductor Physics Quantum Electronics & Optoelectronics
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| Publisher |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
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