Abstract: A system and method of operating a dual-beam detection system of a holographic data storage disc, including: impinging a data beam on a data layer of the holographic data storage disc; impinging a tracking beam on a tracking element of the holographic data storage disc; detecting a reflection of the tracking beam from the tracking element; and coordinating position of the data beam relative to the tracking beam.

Abstract: A method of making a hologram includes recording a first hologram in a holographic recording medium 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 at the second deformation ratio to form a recorded holographic medium.

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 for recording a volume transmission hologram having multiplexed diffraction fringe patterns that can cooperate to display polychromatic images and can be recorded with a single wavelength exposure source.

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 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: 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: An optical disc for micro-holographic data storage, including: optically-enabled material configured to store holographic data; guide grooves; a first coating disposed on the guide grooves and configured to reflect a tracking beam and to transmit a read or record beam; and a second coating disposed to cover the guide grooves and disposed on the first coating.

Abstract: A method of making a hologram includes recording a first hologram in a holographic recording medium 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 at the second deformation ratio to form a recorded holographic medium.

Abstract: An optical disc for micro-holographic data storage, including: optically-enabled material configured to store holographic data; guide grooves; a first coating disposed on the guide grooves and configured to reflect a tracking beam and to transmit a read or record beam; and a second coating disposed to cover the guide grooves and disposed on the first coating.

Abstract: A system and method of operating a dual-beam detection system of a holographic data storage disc, including: impinging a data beam on a data layer of the holographic data storage disc; impinging a tracking beam on a tracking element of the holographic data storage disc; detecting a reflection of the tracking beam from the tracking element; and coordinating position of the data beam relative to the tracking beam.

Abstract: A system and a method for detecting defects in a light-management film are provided. The system includes a first light source configured to emit light onto a first side of the film in a first predetermined region of the film. The system further includes a second light source configured to emit light onto a second side of the film in the first predetermined region of the film. The system further includes a first camera configured to receive a first portion of light reflected from the first predetermined region of film from the first light source and a second portion of the light propagating through the film from the second light source. Finally, the system includes a signal-processing device openably coupled to the first camera configured to detect a defect in the first predetermined region of the film based on at least one of the first and second portions of light.

Abstract: Disclosed herein is a defect detection apparatus comprising a first light source that emits light in a direction parallel to an apex of prismatic structures disposed on a mold; wherein an angle between a central axis of a beam of light emitted by the first light source and a vertical taken at the first light source is about 20 to about 90 degrees; a second light source that emits light in a direction perpendicular to the apex of the prismatic structures disposed on the mold; wherein an angle between a central axis of a beam of light emitted by the second light source and a vertical taken at the second light source is less than 45 degrees; a sample holder for holding the mold; a camera placed directly above the sample holder; and translational stages for supporting the camera and the sample holder.

Abstract: Disclosed herein is a method comprising inspecting a mold for a defect; determining a type of defect present on the mold; sorting the mold by type of defect present; treating the mold with a cleaning process that is suitable to remove the defect; and pressing the mold against a polymeric film to produce a series of defect free light management films; wherein the yield of light management films manufactured from the mold is higher than the yield of light management films that are produced from a comparative mold that has not been treated with the cleaning process.

Abstract: Disclosed herein is a method for inspection of light management films with a plurality of light refractive surface structures, including positioning at least one illumination source, and at least one imaging device are configured to be in a substantially bright field configuration and imaging at least portion of the light management film to provide an acquired image, wherein light from the at least one illumination source is refracted by the film to produce a dark field image at the at least one imaging device. A system for inspection of light management films is also provided.

Abstract: A system for the inspection of and a process for the correction of defects in a microreplicated optical display film manufacturing process. The process steps of manufacturing a master, a plurality of shims from the master, and a multiplicity of display films from each shim are integrated with a systemic defect identification and correction process. Each primary manufacturing step has its own inspection system and correction process where defect information for that step of the process is fed back and analyzed; and from that analysis the subprocess is adjusted to eliminate or reduce the detected defect. The systemic defect is identified as to its source and then fed back and analyzed in the correction step of the respective subprocess in order to cure the root of the defect.