Holographic diffraction grating patterns and methods for creating the same
March 1, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3567561 Production of colored designs Retroreflective material made by recording a plurality of light interference fringe patterns Multi-faceted holographic optical element and methods of making and using same Holographic method for producing desired wavefront transformations Document having an optical-diffraction authenticating element Optially variable surface pattern Holographic wallpaper Method for producing a display with a diffraction grating pattern and a display produced by the method Patent #: 5058992 InventorAssigneeApplicationNo. 552258 filed on 07/12/1990US Classes:359/15, Using a hologram as an optical element359/22, For producing or reconstructing images from multiple holograms (e.g., color, etc.)359/30, Having optical element between object and recording medium359/567, For ornamental effect or display359/572, Reflection grating (e.g., retrodirective)359/575With nonuniform corrugation width, spacing, or depthExaminersPrimary: Arnold, Bruce Y.Assistant: Parsons, David R. Attorney, Agent or FirmForeign Patent References
International ClassesG02B 005/18G02B 005/32 G03H 001/26 AbstractMethods for creating a plurality of holographic diffraction grating patterns in a raster scan fashion. In accordance with the method, the desired pattern is made up of a large plurality of individual spots, each spot comprising a holographic diffraction grating of a predetermined grating spacing and angular orientation for that spot. Variation of the angular orientation and/or grating spacing between spots and/or groups of spots provide the desired holographic effect. The spot locations may vary as desired, including locations drawing out a desired pattern, and two-dimensional orthogonal matrices in which a pattern is drawn by variations between spots or group of spots as in a raster scan type image. Various embodiments and methods for creating the same are disclosed.Field of SearchHOLOGRAPHIC SYSTEM OR ELEMENTFor producing or reconstructing images from multiple holograms (e.g., color, etc.) Having particular recording medium Using a hologram as an optical element Discrete hologram only From grating For ornamental effect or display DIFFRACTION Including particular grating characteristic Reflection grating (e.g., retrodirective) With nonuniform corrugation width, spacing, or depth Having multiple object beam or diffuse object illumination Having optical element between object and recording medium | |
