DEVICE FOR VISUALIZING ACOUSTIC FIELDS OF MICROOBJECTS Russian patent published in 2018 - IPC G01H9/00 

FIELD: physics.

SUBSTANCE: invention relates to instrumentation and can be used to obtain information on the structure of acoustic fields in the development of acousto electronic devices, to record acoustic fields during physical investigations of wave processes in acoustics, and to control structures in objects opaque to visible light. Device for visualization of acoustic fields of microobjects contains the Bragg acousto-optic cell formed by the different acoustic wave propagation velocities by two sound lines that are acoustically connected in series through conjugated convex and concave end spherical surfaces of the same radius in which the acoustic microobject is located on the flat end surface of one sound line and the acousto optical interaction is performed in another sound line, source of coherent optical radiation, optical systems for forming a light beam incident on a Bragg cell and processing a light beam diffracted in a cell, as well as a device for recording the image of the object. Optical system for forming a light beam incident on a Bragg cell contains two cylindrical lenses whose axes are perpendicular to the direction of radiation of the optical coherent source and lie in the plane formed by the direction of radiation of the optical coherent source and the longitudinal axis of the sound lines, the focal lengths of the lenses and the distance between them are chosen so that the lenses form a collimated beam in the plane perpendicular to the plane formed by the direction of radiation of the optical coherent source and the longitudinal axis of the sound lines, a width equal to the size of the optical face of the sound pipe in which the acousto optical interaction occurs in the direction, perpendicular to the plane formed by the direction of radiation of the optical coherent source and the longitudinal axis of the sound lines, and also contains a third cylindrical lens with an axis perpendicular to the plane formed by the direction of radiation of the optical coherent source and the longitudinal axis of the sound lines.

EFFECT: technical result is the increase in brightness and image quality during visualization.

3 cl, 4 dwg