title: Hexagonal liquid crystal lens array for 3D endoscopy.
abstract: A liquid crystal lens array with a hexagonal arrangement is investigated experimentally. The uniqueness of this study exists in the fact that using convex-ring electrode provides a smooth and controllable applied potential profile across the aperture to manage the phase profile. We observed considerable differences between flat electrode and convex-ring electrode; in particular the lens focal length is variable in a wider range from 2.5cm to infinity. This study presents several noteworthy characteristics such as low driving voltage; 30 μm cell gap and the lens is electrically switchable between 2D/3D modes. We demonstrate a hexagonal LC-lens array for capturing 3D images by using single sensor using integral imaging.
authors.forename: Amir
authors.initials: A
authors.lastname: Hassanfiroozi
authors.forename: Yi-Pai
authors.initials: YP
authors.lastname: Huang
authors.forename: Bahram
authors.initials: B
authors.lastname: Javidi
authors.forename: Han-Ping D
authors.initials: HP
authors.lastname: Shieh