Ultrasonic detector cell and system

Details Ultrasonic detector cell and system Ultrasonic detector cell and system

1983-12-27

1987-03-24

Punter, William H.

350371, G02F 113, G02F 111

Patent

active

046520864

ABSTRACT:
There is disclosed herein an orthoscopic ultrasonic imaging system which includes an acoustic transducer for insonifying an object to be inspected and an improved liquid crystal detector cell for receiving an imaging beam from the insonified object and for displaying a visible image.
An acoustic biasing field is applied to the liquid crystal cell for raising the cell to an acousto-optic threshold which permits detection and display of low intensity imaging signals. Using the improved liquid crystal system, low intensity, acoustic fields [e.g. less than 10.sup.-3 w/cm.sup.2 (watts per square centimeter)] can be detected and displayed, and the object being examined can be insonified with low intensity ultrasonic beams.

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