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30 September 2024 Challenges in the use of an optically addressable liquid crystal spatial light modulator for fast area printing metal additive manufacturing
Selim Elhadj
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Proceedings Volume PC13121, Liquid Crystals XXVIII; PC1312102 (2024) https://doi.org/10.1117/12.3027442
Event: Organic Photonics + Electronics, 2024, San Diego, California, United States
Abstract
An optically addressable liquid crystal spatial light modulator (SLM) is used for dynamic laser beam shaping used in a unique, fast metal additive manufacturing process [1]. We address challenges of using our SLM exposed continuously to high power kW-MW lasers. Control of liquid crystals is coupled to the potoexcitation-response of photoconducting insulators that affects contrast, switching speed, and laser power handling. We compare liquid crystal materials laser damage rationalized based on their thermal properties, and highlight device-level stresses via computational modeling. Key areas of liquid crystals and semiconductor properties are presented that impact optically addressed SLM for power switching applications. [1] https://www.seurat.com/area-printing
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Selim Elhadj "Challenges in the use of an optically addressable liquid crystal spatial light modulator for fast area printing metal additive manufacturing", Proc. SPIE PC13121, Liquid Crystals XXVIII, PC1312102 (30 September 2024); https://doi.org/10.1117/12.3027442
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KEYWORDS
Liquid crystals
Metals
Additive manufacturing
Crystal optics
Optics manufacturing
Printing
Spatial light modulators
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