Abstract
A 3D shape of an object can be expressed digitally as a dot array in a resin (laser engraving). A rewritable dot array is creatable with polyethylene glycol, since it exhibits a bistable phase transition; i.e., both the clear and opaque (white) states are stable at room temperature. To control the transmission state of each dot electrically (Joule heating), the electric conductivity of polyethylene glycol was raised by dissolution of alkaline halide salts.
© 2017 Optical Society of Japan
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