Patent ID: 7572555
Filing Date: 2009-08-11
Classification: G03F,G03H

Abstract:
1. A hologram recording material comprising: a sensitizing dye capable of absorbing light having a hologram recording wavelength to generate an excited state thereof; and an interference fringe-recording component capable of recording interference fringes providing a refractive index modulation by an electron or energy transfer from the excited state, the hologram recording material has a thickness of 500 μm or larger, wherein the sensitizing dye in the hologram recording material comprises at least one of a cyanine dye and a merocyanine dye, and has a molar absorption coefficient within a range of 1 to 10,000 at the hologram recording wavelength; and the interference fringe-recording component is a component capable of recording the interference fringes providing a refractive index modulation by a latent image-sensitized polymerization reaction sensitized by a latent image of a residual of a color-erasable dye, and the component records the interference fringes by a method comprising: a first step in which: the sensitizing dye absorbs light upon holographic exposure to generate the excited state thereof, a color of a color-erasable dye is erased by at least one of: an energy or electron transfer from the excited state of the sensitizing dye directly to the color-erasable dye; and a color-erasing agent formed by an energy or electron transfer from the excited state of the sensitizing dye to a color-erasing agent precursor, the color-erasing agent precursor comprising at least one of a radical generator, an acid generator, a base generator, a nucleophilic agent generator, an electrophilic agent generator or a triplet oxygen, and a residual of the color-erasable dye forms a latent image; and a second step of irradiating the latent image of the residual of the color-erasable dye with light of a wavelength region, which is different from that of the holographic exposure, to cause a polymerization reaction by activating a polymerization initiator as a result of an energy or electron transfer from the residual of the color-erasable dye.