9:20 AM - 9:40 AM
[PRJ2-2] Laser Beam Modulation with a Fast Focus Tunable Lens for Speckle Reduction in Laser Projection Displays
speckle reduction, focus tunable lens, angular diversity, spatial diversity
We propose a laser speckle reduction method using a fast focus tunable lens (FTL). Different laser beams are generated after modulating the FTL. Thus, when the laser beams are used to illuminate a diffuser, various speckle images are obtained, and the summed speckle images yield a speckle image with reduced speckle contrast ratio.