A poor man's hologram

摘要

Three-dimensional films have been a hit at the box office, but making them requires pricey equipment. Baoqing Sun at the University of Glasgow, UK, and his colleagues propose a simpler alternative. Instead of using cameras or lasers to achieve a three- dimensional (3D) effect, they illuminate an object with a rapidly changing pattern of black and white squares. Single-pixel detectors placed around the object capture light reflected in various directions, and an algorithm reconstructs a 3D image from these simple inputs.