High-Speed Focal Tracking Projection Based on Liquid Lens

A high-speed projection system with a dynamic focal tracking technology based on a variable focus lens will be illustrated. The traditional projection was limited on 2D space, due to their narrow depth-of-field projection range. The proposed system included a high-speed variable focus lens, a high-speed camera, and a high-speed projector, so that the depth information would be detected and then served as feedback to correct the focal length and update the projection information in high-speed. As a result, the information would be well-focused projected even on a 3D dynamic moving object.