System, method and apparatus for direct imaging in...

Details System, method and apparatus for direct imaging in... System, method and apparatus for direct imaging in...

2007-08-21

2007-08-21

Boutsikaris, Leonidas (Department: 2872)

Optical: systems and elements

Holographic system or element

C367S007000, C367S008000, C367S010000, C073S603000, C073S605000, C359S901000

Reexamination Certificate

active

11274050

ABSTRACT:
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 ultrasonic holographic imaging system may use a reference wave introduced on the side of a thin (3 element) detector that acts as a wave guide; to introduce the reference wave to a liquid-to-gas interface or alternatively, from the topside of the detecting surface through a liquid-to-liquid interface. The system eliminates the acoustic lens system, thereby reducing the size and cost of the system. Further, an object may be placed at the detecting surface, increasing the depth of field of the resultant image and reducing the energy needed from the object source. The system may additionally utilize multiple reference sources.

REFERENCES:
patent: 3879989 (1975-04-01), Brenden
patent: 3964052 (1976-06-01), Langlois
patent: 5212571 (1993-05-01), Garlick et al.
patent: 5235553 (1993-08-01), Garlick et al.
patent: 5329202 (1994-07-01), Garlick et al.
patent: 6353576 (2002-03-01), Garlick et al.

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