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1-3 March 2027
Vienna, Austria

2026 Review

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HSPE 2026 Awards

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Anti-counterfeiting applications demand security features that are both highly secure and easy to authenticate using widely accessible illumination. Traditional holograms are not viable options for industrially relevant fabrication and replication of the security features. They are difficult to fabricate because they require a physical object and a complex setup to record the 3D information. Moreover, once produced, such holograms are not easily edited or reproduced, motivating the development of computational approaches for generating Computer-Generated Holograms (CGHs).1 In this work, we introduce a new type of 3D-CGH that can be reliably reproduced using a laser beam lithography (LBL) tool. The hologram provides a depth effect with approximately ±60° viewing angle from a 3D model input file and can be easily observed under a simple directional white-light source, such as a smartphone flashlight. Building on RAITH’s prior work with Point Light Source (PLS) holograms, which lacked multi-angle depth, our new approach uses as many as 10.000 image frames representing a 3D object to compute phase functions that generate diffractive optical elements (DOEs) within every pixel. Holograms up to 100×100 mm² were fabricated using this method with the ATHOS Rapid 200 tool (RAITH). ATHOS Rapid can achieve a resolution of 600 nm (lines and spaces) and a throughput up to 500 mm²/min while providing 8-bit grayscale depth in real time. Producing a full multi-angle 3D hologram with more than 10.000 image frames result in substantial computational demand. However, ATHOS Rapid proprietary software enables hologram generation at a scale of a couple of cm within a few hours depending primarily on the total number of pixels. These results demonstrate the feasibility of combining advanced computational holography with high-throughput lithography to produce next-generation anti-counterfeiting security features on large surfaces.

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