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14 March 2023 Liquid crystal speckle reducers for head-up displays and polarization imaging (Conference Presentation)
Yihan Jin, Nathan Spiller, Chao He, David Hansford, Martin Booth, Steve Elston, Stephen Morris
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Proceedings Volume PC12442, Emerging Liquid Crystal Technologies XVIII; PC124420A (2023) https://doi.org/10.1117/12.2655371
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
A well-known issue when dealing with lasers as illumination sources is the formation of speckle, which results in an intensity interference pattern that appears superimposed on an image. To combat the formation of speckle, we have been developing tunable liquid crystal (LC) diffusers that can reduce the appearance of speckle in a range of different display and imaging applications. Not only does this approach provide direct control of the speckle contrast, allowing it to be reduced from C = 0.7 to C = 0.07, but it does so without the need for bulky mechanical parts, moving components or expensive elements.
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Yihan Jin, Nathan Spiller, Chao He, David Hansford, Martin Booth, Steve Elston, and Stephen Morris "Liquid crystal speckle reducers for head-up displays and polarization imaging (Conference Presentation)", Proc. SPIE PC12442, Emerging Liquid Crystal Technologies XVIII, PC124420A (14 March 2023); https://doi.org/10.1117/12.2655371
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KEYWORDS
Liquid crystals
Speckle
Heads up displays
Polarization
LCDs
Light emitting diodes
Liquids
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