Methods and apparatus for making holograms
Patent 5592313 Issued on January 7, 1997. Estimated Expiration Date: 
October 17, 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.
October 17, 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 3890041 Radiological installation with adjustable transmission optical attenuator Apparatus for three-dimensional viewing of magnetic resonance imaging tomograms Portable holographic recording apparatus Light writing type projection display using polymer-dispersed liquid crystal and liquid crystal television set as image light source Holographic diffraction grating patterns and methods for creating the same Patent #: 5291317 InventorAssigneeApplicationNo. 323568 filed on 10/17/1994US Classes:359/24, Superimposed holograms only359/22For producing or reconstructing images from multiple holograms (e.g., color, etc.)ExaminersPrimary: Henry, Jon W.Attorney, Agent or FirmInternational ClassG03H 001/26AbstractA method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two-dimensional images, together representative of a physical three-dimensional system, to generate a three-dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate. Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.Other References
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