A novel realization of diffractive optically variable devices using ultrasonic modulation cutting

Ping Guo; Yang Yang

doi:10.1016/j.cirp.2019.04.014

A novel realization of diffractive optically variable devices using ultrasonic modulation cutting

Ping Guo^*, Yang Yang

^*Corresponding author for this work

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Optically variable devices (OVDs) enable the angle-dependent optical effect for anti-counterfeiting. This paper proposes a multi-image encoding strategy and demonstrates single-, two-, and three-layer OVDs using ultrasonic modulation cutting. An analytical model that incorporates the diffractive intensity spectrum, resonance characteristics of diffraction efficiency, and grating geometry is presented to accurately predict the apparent color information in hue, saturation and brightness. Ultrasonic modulation cutting is proposed for ultrafast pixel-level rendering by tuning the grating spacing. Two-layer image encoding is achieved by interlacing gratings with spatially separated diffractive spectra, while a layer of relief image is added for three-layer image encoding.

Original language	English (US)
Pages (from-to)	575-578
Number of pages	4
Journal	CIRP Annals
Volume	68
Issue number	1
DOIs	https://doi.org/10.1016/j.cirp.2019.04.014
State	Published - 2019

Keywords

Micro machining
Optically variable device
Vibration

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.cirp.2019.04.014

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title = "A novel realization of diffractive optically variable devices using ultrasonic modulation cutting",

abstract = "Optically variable devices (OVDs) enable the angle-dependent optical effect for anti-counterfeiting. This paper proposes a multi-image encoding strategy and demonstrates single-, two-, and three-layer OVDs using ultrasonic modulation cutting. An analytical model that incorporates the diffractive intensity spectrum, resonance characteristics of diffraction efficiency, and grating geometry is presented to accurately predict the apparent color information in hue, saturation and brightness. Ultrasonic modulation cutting is proposed for ultrafast pixel-level rendering by tuning the grating spacing. Two-layer image encoding is achieved by interlacing gratings with spatially separated diffractive spectra, while a layer of relief image is added for three-layer image encoding.",

keywords = "Micro machining, Optically variable device, Vibration",

author = "Ping Guo and Yang Yang",

note = "Publisher Copyright: {\textcopyright} 2019 CIRP",

year = "2019",

doi = "10.1016/j.cirp.2019.04.014",

language = "English (US)",

volume = "68",

pages = "575--578",

journal = "CIRP Annals",

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T1 - A novel realization of diffractive optically variable devices using ultrasonic modulation cutting

AU - Guo, Ping

AU - Yang, Yang

PY - 2019

Y1 - 2019

N2 - Optically variable devices (OVDs) enable the angle-dependent optical effect for anti-counterfeiting. This paper proposes a multi-image encoding strategy and demonstrates single-, two-, and three-layer OVDs using ultrasonic modulation cutting. An analytical model that incorporates the diffractive intensity spectrum, resonance characteristics of diffraction efficiency, and grating geometry is presented to accurately predict the apparent color information in hue, saturation and brightness. Ultrasonic modulation cutting is proposed for ultrafast pixel-level rendering by tuning the grating spacing. Two-layer image encoding is achieved by interlacing gratings with spatially separated diffractive spectra, while a layer of relief image is added for three-layer image encoding.

AB - Optically variable devices (OVDs) enable the angle-dependent optical effect for anti-counterfeiting. This paper proposes a multi-image encoding strategy and demonstrates single-, two-, and three-layer OVDs using ultrasonic modulation cutting. An analytical model that incorporates the diffractive intensity spectrum, resonance characteristics of diffraction efficiency, and grating geometry is presented to accurately predict the apparent color information in hue, saturation and brightness. Ultrasonic modulation cutting is proposed for ultrafast pixel-level rendering by tuning the grating spacing. Two-layer image encoding is achieved by interlacing gratings with spatially separated diffractive spectra, while a layer of relief image is added for three-layer image encoding.

KW - Micro machining

KW - Optically variable device

KW - Vibration

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EP - 578

JO - CIRP Annals

JF - CIRP Annals

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A novel realization of diffractive optically variable devices using ultrasonic modulation cutting

Abstract

Keywords

ASJC Scopus subject areas

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