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| Number | Title | Issue Date |
| 7259897 | System, method and apparatus for direct imaging in ultrasonic holography An acoustical holographic imaging method and apparatus for introducing a reference wave into a hologram surface such that the reference wave does not interfere with an object placed adjacent to or in close proximity to the hologram surface. More particularly, the ul... | 08/21/2007 |
| 7113447 | Laser pumped compact acoustic sensor system An acoustic transducer system for acoustic signals in water has at least one hollow spherically-shaped shell for vibrating in response to acoustic signals impinging from the water. The hollow spherically-shaped shell has one or more portions that are reflective of i... | 09/26/2006 |
| 7088455 | Methods and apparatus for material evaluation using laser speckle Methods for measuring strains in biological and other samples include illuminating a specimen with substantially collimated laser flux. An electro-acoustic transducer is activated to generate acoustic waves in the specimen, including a surface wave component such as... | 08/08/2006 |
| 6847584 | Method and apparatus for acoustic imaging of objects in water A method, system and underwater camera for acoustic imaging of objects in water or other liquids includes an acoustic source for generating an acoustic wavefront for reflecting from a target object as a reflected wavefront. The reflected acoustic wavefront deforms a... | 01/25/2005 |
| 6831874 | Ultrasonic holography detector There is disclosed an improved ultrasonic hologram or other ultrasonic imaging process that accurately forms phase and amplitude information of the hologram in a manner that renders the unit relatively insensitive to environment vibrations, and provides long mainten... | 12/14/2004 |
| 6353576 | Detector in ultrasonic holography There is disclosed an improved ultrasonic hologram or other ultrasonic imaging process that accurately forms phase and amplitude information of the hologram in a manner that renders the unit relatively insensitive to environment vibrations, and provides l... | 03/05/2002 |
| 5329817 | Ultrasonic holography imaging method and apparatus A preferred embodiment of this invention is illustrated in FIG. 4 showing an offset and tilted object transducer 50 being rotated about a system axis 51 to sequentially insonify the object from various acute incident angles θ to the system axis to provid... | 07/19/1994 |
| 5179455 | Ultrasonic holographic imaging apparatus having an improved optical reconstruction system A preferred embodiment of the optical reconstruction assembly 50 in which the assembly 50 includes an assembly housing 52 that is a unitary unit for supporting a spatial filter 72 and a light source 74 in a single plane at the optical length "L" from a co... | 01/12/1993 |
| 4905202 | Detection panel and method for acoustic holography A detection panel for acoustic holography with real time image reconstruction includes, a flat cell containing a mixture of nematic and cholesteric liquid crystals whose composition provides a refractive index which varies as a function of acoustic pressu... | 02/27/1990 |
| 4026144 | Apparatus for the generation of polychromatic ultrasonographs Apparatus for a color coded visualization of ultrasonic field patterns resenting differences in acoustical impedance within a solid or liquid body. Colored ultrasonic images are obtained in response to a multifrequency interrogation of a test specimen by... | 05/31/1977 |
| 4025165 | Electro optical imaging device The present invention relates to an electro-optical imaging device containing as transducer a foil electret, having a transparent conducting backplate.... | 05/24/1977 |
| 4006444 | Acoustic imaging apparatus Acoustic imaging apparatus wherein a beam of high frequency acoustic energy is directed to the object to be imaged to create variations in the transmitted acoustic energy which variations are then detected by a plurality of small particles suspended in th... | 02/01/1977 |
| 3990296 | Acoustical holography imaging device An acoustical imaging system wherein an acoustic beam projected through a transmission medium is modified (scattered) by a subject therein and impinges upon one side of an acousto-optic interface. The other side of this interface is made concave and mirro... | 11/09/1976 |
| 3983529 | Detector for use in acoustic holography An improved detector having a reflective surface which is substantially insensitive to vibration. The detection surface comprises a thin layer of liquid metal which is disposed over a substantially rigid, wettable substrate. In a presently preferred embod... | 09/28/1976 |
| 3964052 | Acoustical imaging system An improved system for ensonifying an object, which comprises upper and lower fluid-filled chambers. The chambers are separated by a partition including a lens; a further, movable lens may be disposed within the upper chamber. A reflective-type detector i... | 06/15/1976 |
