Hologram manufacturing method and apparatus
Patent 5502581 Issued on March 26, 1996. Estimated Expiration Date: 
November 18, 2014. 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.
November 18, 2014. 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 3567305 3798618 3807829 Multi-faceted holographic optical element and methods of making and using same Hologram writer and method Holographic image recording using liquid crystal Fiber optic diffraction grating maker Optical crosspoint switch module Patent #: 5040864 InventorsAssigneeApplicationNo. 345357 filed on 11/18/1994US Classes:359/10, Using modulated or plural reference beams359/11, Spatial, phase or amplitude modulation359/21, Having defined page composer359/25, Discrete hologram only359/30Having optical element between object and recording mediumExaminersPrimary: Lerner, MartinAttorney, Agent or FirmForeign Patent References
International ClassesG03H 001/04G03H 001/30 Foreign Application Priority Data1991-11-26 JPAbstractA hologram manufacturing apparatus and a hologram manufacturing method for manufacturing a hologram optical device by a split exposure method are disclosed. The manufacturing apparatus comprises light shield means having a spatial light modulator having a light transparent area and a light non-transparent area thereof controlled corresponding to an input signal, and drive means for driving the spatial light modulator by supplying the signal to the spatial light modulator. The light shield means is arranged closely to a photosensitive material.Field of SearchHOLOGRAPHIC SYSTEM OR ELEMENTFor synthetically generating a hologram Spatial, phase or amplitude modulation For producing or reconstructing images from multiple holograms (e.g., color, etc.) Superimposed holograms only Having optical element between object and recording medium Hardware for producing a hologram Using a hologram as an optical element Having defined page composer Scanner Using modulated or plural reference beams Discrete hologram only | |
