ObeliskMarcel Duchamp

Rotary Demisphere (Precision Optics)

Rotary Demisphere (Precision Optics), 1925, Marcel Duchamp
Rotary Demisphere (Precision Optics), zoomed in
148.6 cm64.2 cm

Rotary Demisphere (Precision Optics) is a Dadaist Papier-mâché, Velvet, Plastic and Copper Sculpture created by Marcel Duchamp in 1925. It lives at the MOMA, Museum of Modern Art in New York. The image is used according to Educational Fair Use, and tagged Readymade. Source

The Rotary Demisphere is one of Marcel Duchamp’s experiments in optical devices, designed to create sensational illusions. The rotating disk could have any number of spiraling plates attached to it, and rotated at high speed to create a variety of effects. The copper ring around the dome’s circumference is engraved a French phrase, chosen for the way their sounds echo one another: Rrose Selavy et moi esquivons les ecchymoses des esquimaux aux mots exquis (Rrose Selavy and I dodge the Eskimos’s bruises with exquisite words).

Further reading atmoma.org
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