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Improving resolution and image space in a static volumetric 3‐D display

Abstract— Improvements achieved in image resolution and volume in a volumetric display based on the two‐frequency, two‐step upconversion (TFTS) method are presented. Two digital micromirror devices (DMDs) are utilized to generate fast scanning of the image volume at high resolution. Improvements in resolution and image size over previous implementations are achieved by choosing sodium—ytterbium—fluoride for the imaging crystal instead of the conventional ytterbium—lithium—fluoride composition. Experimentally, images at 532 nm were constructed using 45 slices with each slice rendered at 1024 × 768 resolution, resulting in almost 35 million voxels. The resulting system has the potential to achieve a resolution beyond a targeted 800 million voxels without viewpoint obstruction and with expandability to three‐color imagery.