PHOTOPOLYMER MEDIUM FOR COLOR HOLOGRAM IMAGE RECORDING, AND COLOR HOLOGRAM IMAGE RECORDING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a photopolymer medium for color hologram image recording and a color hologram image recording method which allow acquisition of a color image of high diffraction efficiency by exposing the same recording layer to light having a plurality of wavelengths.SOLUTION: A photopolymer medium 10 for color hologram image recording includes a recording layer 14 having recording sensitivity to light in two wavelength regions of a wavelength λand a wavelength λ, and the recording layer 14 comprises a material which satisfies a condition that a transmittance Tfor light at the wavelength λand a transmittance Tfor light at the wavelength λof the recording layer before recording are lower than 80% together where Tis lower than T, and satisfies a condition that a transmittance Tfor light at the wavelength λafter recording with only light at the wavelength λis higher than Tand is higher than 10% and lower than 80%.