D407 High-Speed Focal Tracking Projection System Based on Liquid Lens

Ishikawa Senoo Lab(University of Tokyo)/ Watanabe Lab (Tokyo Institute of Technology)

A projection target would be randomly moved in a 3D area, and it would be detected by a high-speed camera, which served as a visual feedback to control the projection focal length via changing the focal length of liquid lens, and then the projection information would be updated on a high-speed projector.

Technical Specification

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