Problem of twin-image elimination in 2-D computer synthesized hologram

Eugene Braginets; Vladimir Girnyk; Sergey Kostyukevych; Alexander Soroka; Irina Androsyuk

doi:10.1117/12.700257

20 February 2007 Problem of twin-image elimination in 2-D computer synthesized hologram

Eugene Braginets, Vladimir Girnyk, Sergey Kostyukevych, Alexander Soroka, Irina Androsyuk

Proceedings Volume 6488, Practical Holography XXI: Materials and Applications; 64880D (2007) https://doi.org/10.1117/12.700257
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

It is well known that one of the basic functions of security holograms is the maximal complication of their nonauthorized 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 Optical Variable Device (DOVID) is integration into DOVID's structure of a Concealed Laser-Readable Image (CLRI). Traditionally CLRI is a 2-D Computer-Generated Hologram (2-D CGH), which is a digitized Interference Fringe Data (IFD) structure, computed under the scheme of Fourier-hologram synthesis. Such hologram provides inspection of second level with portable laser reading devices. While it is being read, two (+/- 1 order of diffraction) identical images are formed. In this work a special kind of CGH, which restores image only in one diffractive order or two different images in +1 and -1 orders of diffraction proposed.

Citation Download Citation

Eugene Braginets, Vladimir Girnyk, Sergey Kostyukevych, Alexander Soroka, and Irina Androsyuk "Problem of twin-image elimination in 2-D computer synthesized hologram", Proc. SPIE 6488, Practical Holography XXI: Materials and Applications, 64880D (20 February 2007); https://doi.org/10.1117/12.700257

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available