International Display Workshops Incorporated Association

9:20 AM - 9:40 AM

[PRJ2-2] Laser Beam Modulation with a Fast Focus Tunable Lens for Speckle Reduction in Laser Projection Displays

Zequn Jian1, *Zhaomin Tong1, Yifei Ma1, Mei Wang1, Suotang Jia1, Xuyuan Chen1,2 (1. Shanxi University (China), 2. University of Southeast Norway (Norway))

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.