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Proceedings Paper

Near zero laser speckle liquid crystal device
Author(s): John Harden; Kai-Han Chang; Thomas Seder; Liang-Chy Chien
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Paper Abstract

Laser-based displays suffer from speckle noise due to the random inference patterns of scattered coherent light from rough surfaces. Commonly utilized solution, such as moving diffusers, creates time-varying speckle patterns that were averaged on the observer’s retina or the image sensor. This solution requires the use of motorized parts and can be bulky with the potential risk of mechanical failure. We present a liquid crystal device that reduces speckle noise by over 90%. It is electrically driven, compact, and with no motorized parts. The randomized, time-varying domains with mismatched refractive indices of the liquid crystals produce varying speckle patterns. A near zero speckle contrast is achieved.

Paper Details

Date Published: 25 February 2020
PDF: 6 pages
Proc. SPIE 11303, Emerging Liquid Crystal Technologies XV, 113030O (25 February 2020); doi: 10.1117/12.2540168
Show Author Affiliations
John Harden, Kent State Univ. (United States)
Kai-Han Chang, General Motors Research and Development (United States)
Thomas Seder, General Motors Research and Development (United States)
Liang-Chy Chien, Kent State Univ. (United States)

Published in SPIE Proceedings Vol. 11303:
Emerging Liquid Crystal Technologies XV
Liang-Chy Chien; Dirk J. Broer, Editor(s)

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