VIJITH, V.A., GEORGE, A., AMBADIYIL, S., JHA, A.K. and PRABHU, R. 2024. Optimization of illumination for security hologram authentication. In Bouma, H., Prabhu, R., Yitzhahy, Y. and Kuijf, H.J. (eds.) Advanced materials, biomaterials, and manufacturing technologies for security and defence II: proceedings of the 2024 SPIE Security + defence, 16-20 September 2024, Edinburgh, UK. Proceedings of SPIE, 13206. Bellingham, WA: SPIE [online], paper 1320618. Available from: https://doi.org/10.1117/12.3034230