Abstract

A volumetric display is capable of creating three-dimensional images in physical space by generating light emission, scattering or absorption points. In this paper, we introduce two coloring methods of femtosecond-laser-excited aerial voxels for a volumetric display. One method extracts an arbitrary color from broadband emission of a voxel using two parabollic mirrors and a liquid-crystal color filter. The other uses scattering light of laser-excited aerial plasma. These methods produce color volumetric images in free-space which have robustness to withstand collision with object.

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