Mono-element Transducers¶

Single-element circular transducers. Focusing comes from the physical curvature of the surface, not electronic delays. See the Transducers API for full parameters and Example 2 — Mono-element Fields.

The radiated pressure fields for these transducers live in the Emission guide.

At a glance¶

Type	Shape	Focusing
`FlatCircularTransducer`	Flat disk	None — diverging field
`ConcaveCircularTransducer`	Spherical bowl	Geometric (focus at z > 0)
`ConvexCircularTransducer`	Spherical dome	Geometric (diverging)
`FocusedCircularTransducer`	Cylindrical arc	Line-focus along one axis

All mono-element transducers have n_elements = 1. Electronic delays have no effect — focusing is achieved through the physical curvature of the surface.

Z-convention¶

For all curved circular transducers the rim is at z = 0. The focus_mm parameter sets the axial depth from the rim to the geometric focus:

tx = ConcaveCircularTransducer(
    diameter_mm=64.0,
    focus_mm=63.0,   # depth from rim to focus
    frequency_Hz=0.5e6,
    no_sub_diameter=30,
)