A three-dimensional scanning method by using code division multiple access and a multiple-antenna technology. Main optical components comprise a modulable light source and a light sensitive element, or an antenna, so that the main optical components have a simple structure. The method can further use sound waves. The method adapts to a glossy surface and a translucent mirror surface by improving the signal receiving sensitivity. To achieve the objective of completing multi-side scanning of an object faster, an optical component needs to be additionally provided, and the additionally-provided optical component has low costs.
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