8 June 2005 Panchromatic emulsions for recording colour holograms
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We present the results obtained using two different types of the new panchromatic ultra-fine grain emulsion BBVPan, manufactured by Colourholographics Ltd. The first emulsion type was manufactured by mixing three monochromatic precipitates, so that each silver halide grain is sensitised with one dye only. The second emulsion was obtained by making one single precipitate containing all three dyes mixed together, so that each silver halide grain may be sensitised by the three dyes. Both emulsions have been compared in order to produce multiple band holographic reflection gratings, multiplexed on a single layer of material. Three different laser systems were used: He-Cd (442 nm), frequency-doubled Nd-YAG (532 nm) and He-Ne (632.8 nm). High diffraction efficiencies, of over 52\%, were obtained for each of the three bands, with little wavelength shifting. Tests with diffuse objects have been also carried out, studying colour balance for each of the emulsions.
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Manuel Ulibarrena, Manuel Ulibarrena, Luis Carretero, Luis Carretero, Roque Madrigal, Roque Madrigal, Pablo Acebal, Pablo Acebal, Salvador Blaya, Salvador Blaya, Antonio Fimia, Antonio Fimia, } "Panchromatic emulsions for recording colour holograms", Proc. SPIE 5827, Opto-Ireland 2005: Photonic Engineering, (8 June 2005); doi: 10.1117/12.605673; https://doi.org/10.1117/12.605673

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