Spectral Decoder CD Art

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A post shared by physicsfun (@physicsfun) on May 16, 2019 at 9:26am PDT

Interesting band and incredible physics toy CD art: 
From Amazon: BUY NOW Cassadaga CD 

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Spectral Decoder CD Art: hidden images are revealed through ingenious and intricate Moiré pattern interference on the CD Cassadaga by the band Bright Eyes. Carefully align and slide the included transparent sheet of horizontal prisms (similar to a Fresnel lens) and the secret images pop into view giving insights and artistic renderings of the songs on this release. The Spectral Decoder process is patented and manufactured by 3D Images Ltd. of London. The accompanying music is the opening bars from the 8th track of this CD "Middleman".