Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • 2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference
  • (Optica Publishing Group, 2017),
  • paper CH_P_18

Speckle reduction in laser projection using micro-structured screens

Not Accessible

Your library or personal account may give you access

Abstract

We combine the concept of reduced spatial coherence, as discussed in [1], with a specialized microstructure of the screen material. When the screen is an array of microlenses, the interference between the fields emitted by different lenses in the array (the cause for cause for speckle) can be inhibited by reducing the on-screen spatial coherence area to below the microlens footprint. In this approach we also have to ensure that this footprint is smaller than the observer’s resolution spot on the screen. Otherwise, we risk resolving the individual lenses of the array in the observed image, thereby reducing the image quality. These two criteria are visualized in Fig.1.

© 2017 IEEE

PDF Article
More Like This
Spatial coherence reduction for speckle free imaging using electroactive rotational optical diffusers

Thazhe Madam Rohith, Hamid Farrokhi, Jeeranan Boonruangkan, and Young-Jin Kim
s1315 Conference on Lasers and Electro-Optics/Pacific Rim (CLEO/PR) 2017

Phosphor Screens for Laser Projection Systems

Takamasa Kohmoto, Masamichi Ohta, Ichiro Fujieda, and Wataru Watanabe
JTu2A.11 Frontiers in Optics (FiO) 2017

Demonstration of Speckle Reduction in a Laser Projector by Micro-electro-mechanical Diffuser Device

Thi-Kim-Trinh Tran, Xuyuan Chen, Øyvind Svensen, and M. Nadeem Akram
FM4F.5 Frontiers in Optics (FiO) 2013

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved