Dot-matrix hologram rendering algorithm and its aalidation through direct laser interference patterning

Tomas Tamulevičius, Mindaugas Juodėnas, Tomas Klinavičius, Andrius Paulauskas, Kęstutis Jankauskas, Armantas Ostreika, Andrius Žutautas, Sigitas Tamulevičius

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Resumé

The fight against forgery of valuable items demands efficient and reasonably priced solutions. A security tag featuring holographic elements for anti-counterfeiting is one of them. However, the content and colours of a diffraction image that would be seen by an observer are often counterintuitive in the design stage. Here, we propose an original algorithm based on the conical diffraction formalism, which can be used to describe the variations of a diffraction image with respect to all aspects of observation. We validate the output of the algorithm by comparing it to test holograms, which we have produced by employing direct laser interference patterning (DLIP) in electrochemically grown nickel foil. We have employed a motorized femtosecond laser system to micro-machine arrays of 65 µm × 65 µm sized diffraction gratings with a defined orientation and pitch on the order of 1 µm. Based on completed diffraction efficiency measurements, we determined optimal ablation parameters, i.e. 57.4 mJ/cm2 fluence per pulse and 1100 pulses/pixel. Furthermore, we show how accurate the proposed algorithm is through measured diffraction spectra as well as captured diffraction images of test holograms produced using the obtained parameters. Finally, we showcase anti-counterfeiting tag prototypes with complex holographic effects, i.e. colour reconstruction, animation effects, and image multiplexing. The proposed algorithm can severely shorten the time between design and production of a holographic tag, especially when realizing it via a competitive origination technology-DLIP.

OriginalsprogEngelsk
Artikelnummer14245
TidsskriftScientific Reports
Vol/bind8
Antal sider11
ISSN2045-2322
DOI
StatusUdgivet - 1. dec. 2018

Fingeraftryk

Color
Nickel
Observation

Citer dette

Tamulevičius, Tomas ; Juodėnas, Mindaugas ; Klinavičius, Tomas ; Paulauskas, Andrius ; Jankauskas, Kęstutis ; Ostreika, Armantas ; Žutautas, Andrius ; Tamulevičius, Sigitas. / Dot-matrix hologram rendering algorithm and its aalidation through direct laser interference patterning. I: Scientific Reports. 2018 ; Bind 8.
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abstract = "The fight against forgery of valuable items demands efficient and reasonably priced solutions. A security tag featuring holographic elements for anti-counterfeiting is one of them. However, the content and colours of a diffraction image that would be seen by an observer are often counterintuitive in the design stage. Here, we propose an original algorithm based on the conical diffraction formalism, which can be used to describe the variations of a diffraction image with respect to all aspects of observation. We validate the output of the algorithm by comparing it to test holograms, which we have produced by employing direct laser interference patterning (DLIP) in electrochemically grown nickel foil. We have employed a motorized femtosecond laser system to micro-machine arrays of 65 µm × 65 µm sized diffraction gratings with a defined orientation and pitch on the order of 1 µm. Based on completed diffraction efficiency measurements, we determined optimal ablation parameters, i.e. 57.4 mJ/cm2 fluence per pulse and 1100 pulses/pixel. Furthermore, we show how accurate the proposed algorithm is through measured diffraction spectra as well as captured diffraction images of test holograms produced using the obtained parameters. Finally, we showcase anti-counterfeiting tag prototypes with complex holographic effects, i.e. colour reconstruction, animation effects, and image multiplexing. The proposed algorithm can severely shorten the time between design and production of a holographic tag, especially when realizing it via a competitive origination technology-DLIP.",
author = "Tomas Tamulevičius and Mindaugas Juodėnas and Tomas Klinavičius and Andrius Paulauskas and Kęstutis Jankauskas and Armantas Ostreika and Andrius Žutautas and Sigitas Tamulevičius",
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Tamulevičius, T, Juodėnas, M, Klinavičius, T, Paulauskas, A, Jankauskas, K, Ostreika, A, Žutautas, A & Tamulevičius, S 2018, 'Dot-matrix hologram rendering algorithm and its aalidation through direct laser interference patterning', Scientific Reports, bind 8, 14245. https://doi.org/10.1038/s41598-018-32294-5

Dot-matrix hologram rendering algorithm and its aalidation through direct laser interference patterning. / Tamulevičius, Tomas; Juodėnas, Mindaugas; Klinavičius, Tomas; Paulauskas, Andrius; Jankauskas, Kęstutis; Ostreika, Armantas; Žutautas, Andrius; Tamulevičius, Sigitas.

I: Scientific Reports, Bind 8, 14245, 01.12.2018.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Dot-matrix hologram rendering algorithm and its aalidation through direct laser interference patterning

AU - Tamulevičius, Tomas

AU - Juodėnas, Mindaugas

AU - Klinavičius, Tomas

AU - Paulauskas, Andrius

AU - Jankauskas, Kęstutis

AU - Ostreika, Armantas

AU - Žutautas, Andrius

AU - Tamulevičius, Sigitas

PY - 2018/12/1

Y1 - 2018/12/1

N2 - The fight against forgery of valuable items demands efficient and reasonably priced solutions. A security tag featuring holographic elements for anti-counterfeiting is one of them. However, the content and colours of a diffraction image that would be seen by an observer are often counterintuitive in the design stage. Here, we propose an original algorithm based on the conical diffraction formalism, which can be used to describe the variations of a diffraction image with respect to all aspects of observation. We validate the output of the algorithm by comparing it to test holograms, which we have produced by employing direct laser interference patterning (DLIP) in electrochemically grown nickel foil. We have employed a motorized femtosecond laser system to micro-machine arrays of 65 µm × 65 µm sized diffraction gratings with a defined orientation and pitch on the order of 1 µm. Based on completed diffraction efficiency measurements, we determined optimal ablation parameters, i.e. 57.4 mJ/cm2 fluence per pulse and 1100 pulses/pixel. Furthermore, we show how accurate the proposed algorithm is through measured diffraction spectra as well as captured diffraction images of test holograms produced using the obtained parameters. Finally, we showcase anti-counterfeiting tag prototypes with complex holographic effects, i.e. colour reconstruction, animation effects, and image multiplexing. The proposed algorithm can severely shorten the time between design and production of a holographic tag, especially when realizing it via a competitive origination technology-DLIP.

AB - The fight against forgery of valuable items demands efficient and reasonably priced solutions. A security tag featuring holographic elements for anti-counterfeiting is one of them. However, the content and colours of a diffraction image that would be seen by an observer are often counterintuitive in the design stage. Here, we propose an original algorithm based on the conical diffraction formalism, which can be used to describe the variations of a diffraction image with respect to all aspects of observation. We validate the output of the algorithm by comparing it to test holograms, which we have produced by employing direct laser interference patterning (DLIP) in electrochemically grown nickel foil. We have employed a motorized femtosecond laser system to micro-machine arrays of 65 µm × 65 µm sized diffraction gratings with a defined orientation and pitch on the order of 1 µm. Based on completed diffraction efficiency measurements, we determined optimal ablation parameters, i.e. 57.4 mJ/cm2 fluence per pulse and 1100 pulses/pixel. Furthermore, we show how accurate the proposed algorithm is through measured diffraction spectra as well as captured diffraction images of test holograms produced using the obtained parameters. Finally, we showcase anti-counterfeiting tag prototypes with complex holographic effects, i.e. colour reconstruction, animation effects, and image multiplexing. The proposed algorithm can severely shorten the time between design and production of a holographic tag, especially when realizing it via a competitive origination technology-DLIP.

U2 - 10.1038/s41598-018-32294-5

DO - 10.1038/s41598-018-32294-5

M3 - Journal article

VL - 8

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

M1 - 14245

ER -

Tamulevičius T, Juodėnas M, Klinavičius T, Paulauskas A, Jankauskas K, Ostreika A et al. Dot-matrix hologram rendering algorithm and its aalidation through direct laser interference patterning. Scientific Reports. 2018 dec 1;8. 14245. https://doi.org/10.1038/s41598-018-32294-5