Holographic Recording with Photopolymers

Phase holograms have been recorded using several photopolymers. These photopolymer recording systems are self-developing and require only uv-light fixing. Sensitivities as high as 0.6 mJ/cm2 have been achieved with He–Ne–laser light. Reconstructions from 3000-line/mm gratings recorded on these materials have been achieved; however, the signal-to-noise ratio falls off above 1500 lines/mm. Microscopy has revealed that the hologram is recorded both on the surface and in the volume of the polymer, and that the surface modulation provides the dominant contribution to the diffraction efficiency for 25-μm-thick films.