Hologram writing apparatus and method
Patent 4655539 Issued on April 7, 1987. Estimated Expiration Date: 
October 23, 2004. 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 23, 2004. 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 ReferencesHologram writer and method Patent #: 4498740 InventorsAssigneeApplicationNo. 06/664392 filed on 10/23/1984US Classes:359/9, For synthetically generating a hologram348/40, HOLOGRAPHIC359/10, Using modulated or plural reference beams359/30Having optical element between object and recording mediumExaminersPrimary: Arnold, Bruce Y.Attorney, Agent or FirmInternational ClassG03H 1/08 (20060101)AbstractAn improved hologram writer writes a halogram from a three dimensional data stream or signal such as a signal corresponding to a scene, a picture, drawing or the like. A reference beam and an object or information beam are directed to a holographic recording member, and the information beam is focused through a point near the holographic recording member. A diverger means such as a diffuser, a lens array, a holographic element or the like adapted to form an expanding beam from a point image or spot receives a focused modulated information beam and directs it to the holographic recording member as a divergent beam. The beam may be sent directly to the recording member or it may be optically or otherwise relayed to the member. The point source may be in front of, behind or within the holographic recording member. | |
