Device for handling objects, using acoustic force fields

A device intended for the handling of objects present in a channel within a fluid, notably a liquid, including:

• a channel extending along a longitudinal axis, the channel having a cross section with a width measured along a first transverse axis and a thickness measured along a second transverse axis perpendicular to the first, the width being greater than or equal to the thickness, the channel having first and second walls along the second transverse axis,
• an acoustic wave generator which generates acoustic waves in the channel from at least one of said walls,
• said acoustic wave generator operating at a frequency f which is different from a resonance frequency f0 of the channel along the second transverse axis, and at least one layer of objects being formed by acoustic focusing.

A device intended for the handling of objects present in a channel within a fluid including:

• a channel extending along a longitudinal axis, the channel having a cross section with a width measured along a first transverse axis and a thickness measured along a second transverse axis perpendicular to the first, the width being greater than or equal to the thickness, the channel having first and second walls along the second transverse axis,
• an acoustic wave generator which generates acoustic waves in the channel from at least one of said walls, said acoustic wave generator operating at a frequency f which is different from a resonance frequency f0 of the channel along the second transverse axis, and is in the range from 0.75f0 to 1.25f0.