get_spherically_focused_ring()
Description: This function creates a planar ring transducer. It is intended to work with the create_ring_arrray functions, but it can be used independently.
Usage
transducer = get_spherically_focused_ring(inner_radius, outer_radius, geometric_focus);
transducer = get_spherically_focused_ring(inner_radius, outer_radius, geometric_focus,center);
transducer = get_spherically_focused_ring(inner_radius, outer_radius, geometric_focus,center, euler);
Arguments
- inner_radius inner radius of the transducer in m.
- outer_radius outer radius of the transducer in m.
- geometric_focus geometric focus of the transducer in m.
- center a 3x1 or 1x3 array with the center coordinate of the element.
- euler a 3x1 or 1x3 array with the rotation of the element in radian. For details about how FOCUS handles Euler angles, see the documentation for rotate_vector_forward.
Output Parameters
- transducer A FOCUS transducer struct.
Notes
The weight of the transducer is set to 1 and the phase is
set to zero. If you need to focus via phase shifting, you must manually change the phase after the function has run.