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 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 making a hologram (10) includes recording a first hologram in a holographic recording medium (14) at a first deformation ratio; changing the first deformation ratio to a second deformation ratio that is different from the first deformation ratio; and recording a second hologram in the holographic recording medium (14) at the second deformation ratio to form a recorded holographic medium.
Abstract:
Disclosed herein are novel amidic nitrone and a method of manufacturing a data storage media comprising mixing the amidic nitrone, as a photochromic dye, with an organic material or an inorganic material to form a holographic composition and molding the holographic composition into holographic data storage media. Disclosed herein too is an article comprising a photochromic dye and an organic material, wherein the article is used as a data storage media. Disclosed herein too is a method for recording information comprising irradiating an article that comprises a photochromic dye, wherein the irradiation is conducted with electromagnetic energy having a wavelength of about 350 to about 1,100 nanometers; and reacting the photochromic dye.
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 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:
A method is described for recording a volume reflection holographic image viewable when illuminated by light at a wavelength W v . The method includes optically coupling a first transparent refracting medium with a first surface of a transparent holographic recording medium having a refractive index n, the holographic recording medium being photosensitive to external light at wavelength W different than Wv; and exposing the holographic recording medium to a signal coherent light source including image or other information to be recorded in the holographic recording medium and a reference coherent light source, the signal and reference coherent light sources emitting light at the wavelength W and entering the holographic recording medium through opposing surfaces thereof, wherein the signal coherent light source or the reference coherent light source passes through the first transparent refracting medium before entering the holographic recording medium at an internal angle of incidence greater than arcsin(l/n).
Abstract:
A method of recording a volume holographic image is described in which a holographic recording medium (14) containing a photoreactive dye is exposed to a plurality of coherent light beams having 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 an interference fringe pattern formed by 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 for recording a volume transmission hologram having angularly multiplexed diffraction fringe patterns that can cooperate to display polychromatic images and can be recorded with a single wavelength exposure source.