naive

The Naive method is an algorithm that applies back-propagation to the target sound pressure vector. It does not iterate and is fast, but it does not correct for interference between focal points, so a weak sound field may be generated.

API

Rust

naive(
    &NalgebraBackend,
    &geometry,
    &foci,
    wavelength,
    &option,
    &mut phases,
    &mut intensities,
)?;

Python

naive(geometry, foci, wavelength, option, phases, intensities)

C#

Holo.Naive(geometry, foci, wavelength, option, phases, intensities);

Parameter	Type	Description
geometry	&Geometry	Device layout
foci	&[AmplitudeTarget]	Sequence of focal points (position and target amplitude)
wavelength	Length	Wavelength
option	&NaiveOption	Additional options (see below)
phases	&mut [Vec<Phase>]	Phase output buffer
intensities	&mut [Vec<Intensity>]	Intensity output buffer

NaiveOption

Rust

NaiveOption {
    constraint,
    directivity,
    mask,
}

Python

NaiveOption(
    constraint,
    directivity,
    mask,
)

C#

new NaiveOption
{
    Constraint = constraint,
    Directivity = directivity,
    Mask = mask,
}

Field	Type	Default
constraint	IntensityConstraint	Clamp(MIN, MAX)
directivity	Directivity	Sphere
mask	TransducerMask	AllEnabled

Example

Rust

use autd3_rs::geometry::{Autd3, Geometry, TransducerMask, offset};
use autd3_rs::units::{m, mm, s};
use autd3_rs::value::Intensity;
use autd3_rs_pattern::wavelength;
use autd3_rs_pattern_holo::{
    AmplitudeTarget, Directivity, IntensityConstraint, NaiveOption, NalgebraBackend, Pa, naive,
};

let geometry = Geometry::new(vec![Autd3::default()]);

let mut phases = geometry.phase_buffer();
let mut intensities = geometry.intensity_buffer();

naive(
    &NalgebraBackend,
    &geometry,
    &[
        AmplitudeTarget {
            point: geometry.center() + offset(-30.0 * mm, 0.0 * mm, 150.0 * mm),
            amplitude: 2.5e3 * Pa,
        },
        AmplitudeTarget {
            point: geometry.center() + offset(30.0 * mm, 0.0 * mm, 150.0 * mm),
            amplitude: 2.5e3 * Pa,
        },
    ],
    wavelength(340.0 * m / s),
    &NaiveOption {
        constraint: IntensityConstraint::Clamp(Intensity::MIN, Intensity::MAX),
        directivity: Directivity::Sphere,
        mask: TransducerMask::AllEnabled,
    },
    &mut phases,
    &mut intensities,
)?;

Python

from autd3.geometry import Autd3, Geometry, offset
from autd3.units import m, mm, s
from autd3.value import Intensity
from autd3_pattern import TransducerMask, wavelength
from autd3_pattern_holo import (
    AmplitudeTarget,
    Directivity,
    IntensityConstraint,
    NaiveOption,
    Pa,
    naive,
)

geometry = Geometry([Autd3()])

phases = geometry.phase_buffer()
intensities = geometry.intensity_buffer()

naive(
    geometry,
    [
        AmplitudeTarget(
            point=geometry.center() + offset(-30.0 * mm, 0.0 * mm, 150.0 * mm),
            amplitude=2.5e3 * Pa,
        ),
        AmplitudeTarget(
            point=geometry.center() + offset(30.0 * mm, 0.0 * mm, 150.0 * mm),
            amplitude=2.5e3 * Pa,
        ),
    ],
    wavelength(340 * m / s),
    NaiveOption(
        constraint=IntensityConstraint.Clamp(Intensity.MIN, Intensity.MAX),
        directivity=Directivity.Sphere,
        mask=TransducerMask.AllEnabled,
    ),
    phases,
    intensities,
)

C#

using AUTD3;
using AUTD3.Holo;
using static AUTD3.Units;
using static AUTD3.Holo.HoloUnits;

var geometry = new Geometry(new[] { new Autd3() });

var phases = geometry.PhaseBuffer();
var intensities = geometry.IntensityBuffer();

Holo.Naive(
    geometry,
    new[]
    {
        new AmplitudeTarget(geometry.Center + Offset(-30.0f * mm, 0.0f * mm, 150.0f * mm), 2.5e3f * Pa),
        new AmplitudeTarget(geometry.Center + Offset(30.0f * mm, 0.0f * mm, 150.0f * mm), 2.5e3f * Pa),
    },
    Pattern.Wavelength(340.0f * m / s),
    new NaiveOption
    {
        Constraint = IntensityConstraint.Clamp(Intensity.Min, Intensity.Max),
        Directivity = Directivity.Sphere,
        Mask = TransducerMask.AllEnabled,
    },
    phases,
    intensities
);