Thomas Walger

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Related publications (5)

Synthesis of moving and beating moiré shapes

Roger Hersch, Jürgen Brugger, Thomas Walger

The present invention proposes a method for producing an authenticable moiré shape that simultaneously moves and shows a beating effect. The method relies on a combination of the 1D or the 2D moiré and the level line moiré. When tilting a compound showing ...

2022

Level-line moirés by superposition of cylindrical microlens gratings

Roger Hersch, Jürgen Brugger, Valentin Flauraud, Théophane Besson, Thomas Walger

Two superposed layers of transparent cylindrical lenslet gratings create classical moiré fringes when illuminated from behind. We rely on this observation to conceive special devices made of superposed lenslet gratings that produce compelling beating shape ...

2020

Moiré effects produced by superpositions of micro-lens arrays

Thomas Walger

Moiré effects result from the superimposition of repetitive structures. The beauty of these moirés comes from the fact that macroscopic shapes seem to appear from the superposition of layers containing microscopic patterns. In addition, the moirés are dyna ...

EPFL2020

1D moiré shapes by superposed layers of micro-lenses

Roger Hersch, Jürgen Brugger, Valentin Flauraud, Théophane Besson, Thomas Walger

Two superposed layers of transparent cylindrical lenslet gratings create classical moiré fringes, when illuminated from behind. We rely on this observation to conceive special devices made of superposed lenslet gratings that produce animated moirés when th ...

2019

Synthesis of superposition shape images by light interacting with layers of lenslets

Roger Hersch, Jürgen Brugger, Valentin Flauraud, Théophane Besson, Thomas Walger

The present invention describes methods and apparatuses for creating superposition shape images by superposed base and revealing layers of lenslet gratings. The superposition shape images form a message recognizable by a human observer or by an image acqui ...

2017

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