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The development of a panchromatic acrylamide based photopolymer (ABP) for holographic recording application is presented. The scattering of the recording medium was characterised by measuring the Bidirectional Scattering Distribution Function (BSDF). The dynamic range in reflection mode of recording was evaluated by measuring the diffraction efficiencies of the holographic gratings recorded individually at 633nm, 532nm, and 473nm wavelengths at spatial frequencies of 4200 l/mm, 5000 l/mm and 5700 l/mm respectively. Spectral characterisation of the reflection gratings recorded using a combined single RGB beam was carried out and the reconstructed wavelengths were monitored and compared with the recording wavelengths. The recorded and the reconstructed wavelengths were plotted as points on the CIE chromaticity diagram in order to reveal the shifts due to material shrinkage in the corresponding RGB wavelengths. Finally reflection holograms of an object were successfully recorded at all the three primary wavelengths. The results represent a strong confirmation that this acrylamide based photopolymer can be used as a panchromatic recording material and can be employed in future commercial holographic applications.
Meka, C. et al. (2010) Development of a panchromatic acrylamide based photopolymer for multicolour reflection holography. Applied Optics, Vol. 49, Issue 8, pp. 1400-1405. doi:10.1364/AO.49.001400