3 June 2002 SHSG processing for three-wavelength HOEs recording in silver halide materials
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Abstract
The recording and processing technique for color HOEs in ultrafine-grain panchromatic silver halide emulsions is presented. It is possible to obtain high diffraction efficiency employing the silver halide sensitized gelatin (SHSG) process. SHSG holograms are similar to holograms recorded in dichromated gelatin (DCG). The drawback of DCG is its low sensitivity and limited spectral response. Panchromatic silver halide materials from Slavich can be processed in such a way that the final holograms have properties like a DCG hologram. The processing method or microvoid technique has been optimized for three laser- wavelength recordings in Slavich PFG-03C emulsion. For example, applying this new processing technique high- efficiency white holographic reflectors can be manufactured. The technique is also suitable for producing efficiency color display holograms. In particular, masters for mass production of color holograms or color HOEs can be performed by contact-copying into photopolymer materials because the reconstruction wavelengths are identical to the recording wavelengths.
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Jong Man Kim, Jong Man Kim, Yoon Sun Choi, Yoon Sun Choi, Hans I. Bjelkhagen, Hans I. Bjelkhagen, Nicholas J. Phillips, Nicholas J. Phillips, } "SHSG processing for three-wavelength HOEs recording in silver halide materials", Proc. SPIE 4659, Practical Holography XVI and Holographic Materials VIII, (3 June 2002); doi: 10.1117/12.469293; https://doi.org/10.1117/12.469293
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