1 August 1985 Hologram Recording With A New Photopolymer System
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Holography with a new photopolymer system, Polaroid DMP-128, is described. Films of DMP-128 from an aqueous solvent are coated on either solid or flexible substrates. The resulting films, when stored dry, have a shelf life that exceeds nine months. The dry films are inactive and must be incubated for a few minutes in an environment of approximately 50% RH before laser expo-sure. Recording is possible with either blue (442 nm, 488 nm), green (514 nm), or red (633 nm, 647 nm) laser light. Exposure of 5 mJ/cm2 is sufficient for high diffraction efficiency (80% to 95%) transmission holograms, while 30 mJ/cm2 is required for bright reflection holograms. It is not necessary to exclude atmospheric oxygen during hologram recording. Refractive index modulation of 0.03 is routinely achieved. After laser exposure a uniform white-light illumination is used to complete the photopolymerization. A single processing bath yields holograms with good environmental stability. An additional processing bath yields images with exceptional resistance to high humidity.
R. T. Ingwall, R. T. Ingwall, H. L. Fielding, H. L. Fielding, } "Hologram Recording With A New Photopolymer System," Optical Engineering 24(5), 245808 (1 August 1985). https://doi.org/10.1117/12.7973579 . Submission:

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