APPARATUS FOR IMAGING ACOUSTIC FIELD IN OPTICALLY REFLECTING ELASTIC SURFACE Russian patent published in 2014 - IPC G01N29/06 G01H9/00 

FIELD: physics.

SUBSTANCE: apparatus includes a laser, a divider, first and second lenses and series-connected ultrasound generator and piezoceramic radiator, located in a container in which an analysed sample and a converging acoustic lens are placed on one line with the radiator. The wall of the container is optically reflecting in the direction of the sample from the radiator. The container is sealed and filled with an inert gas under pressure, which ensures minimal re-reflections at the sample and gas media boundaries. The optically reflecting surface is made of two optically transparent thin and durable walls, with a thin layer of mercury in between. When recording an acoustic image, the laser operates in waiting pulse mode. One of the laser beams split by the divider is collimated by a first lens and then, through reflection from the optically reflecting elastic surface of the container, falls on a holographic plate, and the second beam is collimated by a second lens and falls on the same surface of the holographic plate, forming a holographic interferogram.

EFFECT: high resolution of the device, high noise-immunity thereof and easy control.

1 dwg