Holographic imaging through scattering media
Patent 5299035 Issued on March 29, 1994. Estimated Expiration Date: 
March 25, 2012. 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.
March 25, 2012. 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 3614426 3639029 Transmissive holographic optical element on aberrating substrate Image transmission through thick aberrators Patent #: 5126862 InventorsApplicationNo. 857546 filed on 03/25/1992US Classes:359/9, For synthetically generating a hologram359/1, HOLOGRAPHIC SYSTEM OR ELEMENT359/28, Having multiple object beam or diffuse object illumination359/30, Having optical element between object and recording medium359/35, Hardware for producing a hologram359/900, METHODS382/128, Biomedical applications382/274Intensity, brightness, contrast, or shading correctionExaminersPrimary: Sugarman, Scott J.Assistant: Parsons, David R. Attorney, Agent or FirmInternational ClassesG03H 001/02G03H 001/04 G03H 001/08 AbstractAn image of an object embedded in a diffusing medium is formed by propagating a coherent or equivalent light pulse through the diffusing medium and applying a reference pulse so as to gate precisely the first emerging light transmitted through the diffusing medium. An ultra-short pulse, having a duration on the order of 150 fs, insures that only the first emerging light is used to form a hologram. Instability in the diffusing medium, which may be inherent therein, as is the case with living tissue, or artificially induced therein, such as by vibrating the specimen, ensures that a subsequent hologram has a different background noise and speckle pattern. Integration of such holograms causes the background noise to average out, but time-invariant features, such as the object being imaged, become increasingly more visible as more holograms are integrated.Field of SearchHaving particular recording mediumRecyclable For synthetically generating a hologram For producing or reconstructing images from multiple holograms (e.g., color, etc.) Superimposed holograms only Discrete hologram only Having defined page composer Having optical element between object and recording medium Focused image holography For reconstructing image Real image Hardware for producing a hologram DIFFUSING OF INCIDENT LIGHT Having multiple object beam or diffuse object illumination HOLOGRAPHIC SYSTEM OR ELEMENT METHODS | |
