Abstract: Articles for recording a holographic image are described. The articles include a holographic recording medium having a plurality of surfaces, having a transparent polymeric binder and a photochemically active dye, the holographic recording medium having a holographic image recorded therein formed by exposed areas of the photochemically active dye and unexposed areas of the photochemically active dye; and a first light-blocking layer or material over a first surface of the holographic recording medium from which surface the holographic image is viewed, the light blocking layer or material absorbing light in the wavelength range to which the photochemically active dye is sensitive and allowing transmission of light in a different wavelength range for viewing the holographic image.

Abstract: Articles for recording a holographic image are described. The articles include a holographic recording medium having a plurality of surfaces, having a transparent polymeric binder and a photochemically active dye, the holographic recording medium having a holographic image recorded therein formed by exposed areas of the photochemically active dye and unexposed areas of the photochemically active dye; and a first light-blocking layer or material over a first surface of the holographic recording medium from which surface the holographic image is viewed, the light blocking layer or material absorbing light in the wavelength range to which the photochemically active dye is sensitive and allowing transmission of light in a different wavelength range for viewing the holographic image.

Abstract: A method is described for recording a volume reflection holographic image that is viewable when illuminated by light at a wavelength Wv.

Abstract: A method of manufacturing an article for display of a holographic image is described that includes thermally fusing a holographic recording medium containing a photochemically active dye dispersed in a transparent thermoplastic polymer binder to another layer or material; and then exposing the holographic film to intersecting beams of coherent light to form a holographic image therein formed by photoreacted areas of the photochemically active dye and unreacted areas of the photochemically active dye.

Abstract: A method of recording a volume holographic image is described in which a holographic recording medium containing a photoreactive dye is exposed to a plurality of coherent light sources emitting at a wavelength to which the dye is sensitive, thereby forming an interference fringe pattern therein. The photoreaction occurring in the areas of constructive interference generates a periodic array of photoreacted areas of the dye and unreacted areas of the dye. This generated interference fringe pattern may contain, but does not have to contain any image or other encoded information. Selected areas of the interference fringe pattern are then exposed to actinic radiation in such a manner to partially or fully bleach, remove, or deactivate the photoreactive dye fringe pattern, thereby producing a holographic pattern, shape, or image formed by areas of the interference fringe pattern that were not bleached, removed, or deactivated.

Abstract: A method of recording a holographic record is described. According to this method, a holographic recording medium is exposed to a desired pattern, shape, or image from a coherent light source emitting light at one or more wavelengths to which the holographic recording medium is sensitive. In this method, light having the desired pattern, shape, or image to which the holographic recording medium is exposed is diffracted by a spatially homogeneous optical diffraction element so that the holographic recording medium is exposed to a plurality of interfering light beams, thereby forming a holographic record in the holographic recording medium. Holographic recording articles are described that include a holographic recording medium and a spatially homogeneous optical diffraction element.

Abstract: Disclosed herein are novel nitrone compounds, holographic recording media that include the nitrone compound(s) and a polymer binder, a method of manufacturing a holographic recording medium where the nitrone compound, as a photochromic dye, is mixed with a polymer binder to form a holographic composition and molding the holographic composition into holographic data recording medium. Disclosed herein too is a method for recording a hologram by exposing the holographic recording medium to mutually coherent signal and reference light sources at a wavelength that causes a change in the chemical structure of the nitrone compound.

Abstract: A method of recording a volume holographic image is described in which a holographic recording medium containing a photoreactive dye is exposed to a plurality of coherent light sources emitting at a wavelength to which the dye is sensitive, thereby forming an interference fringe pattern therein. The photoreaction occurring in the areas of constructive interference generates a periodic array of photoreacted areas of the dye and unreacted areas of the dye. This generated interference fringe pattern may contain, but does not have to contain any image or other encoded information. Selected areas of the interference fringe pattern are then exposed to actinic radiation in such a manner to partially or fully bleach, remove, or deactivate the photoreactive dye fringe pattern, thereby producing a holographic pattern, shape, or image formed by areas of the interference fringe pattern that were not bleached, removed, or deactivated.

Abstract: A method is described for recording a volume reflection holographic image that is viewable when illuminated by light at a wavelength Wv.

Abstract: Articles for recording a holographic image are described. The articles include a holographic recording medium having a plurality of surfaces, having a transparent polymeric binder and a photochemically active dye, the holographic recording medium having a holographic image recorded therein formed by exposed areas of the photochemically active dye and unexposed areas of the photochemically active dye; and a first light-blocking layer or material over a first surface of the holographic recording medium from which surface the holographic image is viewed, the light blocking layer or material absorbing light in the wavelength range to which the photochemically active dye is sensitive and allowing transmission of light in a different wavelength range for viewing the holographic image.

Abstract: A method of manufacturing an article for display of a holographic image is described that includes thermally fusing a holographic recording medium containing a photochemically active dye dispersed in a transparent thermoplastic polymer binder to another layer or material; and then exposing the holographic film to intersecting beams of coherent light to form a holographic image therein formed by photoreacted areas of the photochemically active dye and unreacted areas of the photochemically active dye.