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13 March 2024 A liquid crystal active screen for RGB laser speckle reduction
Nathan Spiller, Yihan Jin, Grahame Faulkner, Martin Booth, Steve Elston, Stephen Morris
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Proceedings Volume PC12907, Emerging Liquid Crystal Technologies XIX; PC129070E (2024) https://doi.org/10.1117/12.3000405
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
Lasers offer highly desirable characteristics for imaging and display applications, including high directionality, intensity, and potential for a wide color gamut. However, the coherence of laser light leads to the formation of speckle, a spatially distributed granular distortion caused by interference. In this presentation, we demonstrate novel liquid crystal (LC) active screens that enable a significant reduction in the speckle noise for RGB laser illumination sources. The advantages of the active screen approach are then highlighted in comparison to LC speckle reducers used in transmissive geometries. We conclude by considering the impact of the active screen configuration on image formation.
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Nathan Spiller, Yihan Jin, Grahame Faulkner, Martin Booth, Steve Elston, and Stephen Morris "A liquid crystal active screen for RGB laser speckle reduction", Proc. SPIE PC12907, Emerging Liquid Crystal Technologies XIX, PC129070E (13 March 2024); https://doi.org/10.1117/12.3000405
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KEYWORDS
Speckle
Liquid crystals
Displays
RGB color model
Red lasers
Distortion
Light sources and illumination
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