Near zero laser speckle liquid crystal device

John Harden; Kai-Han Chang; Thomas Seder; Liang-Chy Chien

doi:10.1117/12.2540168

25 February 2020 Near zero laser speckle liquid crystal device

John Harden, Kai-Han Chang, Thomas Seder, Liang-Chy Chien

Proceedings Volume 11303, Emerging Liquid Crystal Technologies XV; 113030O (2020) https://doi.org/10.1117/12.2540168
Event: SPIE OPTO, 2020, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

John Harden, Kai-Han Chang, Thomas Seder, and Liang-Chy Chien "Near zero laser speckle liquid crystal device", Proc. SPIE 11303, Emerging Liquid Crystal Technologies XV, 113030O (25 February 2020); https://doi.org/10.1117/12.2540168

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