Coded illuminator and light field projection device using the same

摘要

A coded illuminator includes a light source, a light-uniform element, a coding element, and an optical module. The light source is configured to provide a light beam. The light-uniform element is configured to make the light beam uniform. The coding element has a plurality of viewing units arranged along a row direction. The coding element includes a plurality of reflective elements arranged in an array manner and a control unit connected to the reflective elements. In any time period, the reflective elements are respectively in an on state or an off state. In at least one of the viewing units, the reflective elements in on state compose a reflective area extending along a column direction being substantially perpendicular to the row direction. The gray scale of the viewing unit is decided by the number of reflective elements in the on state.