Examination object#

The ExaminationObject class and its subclasses contain information about the inspected object. This object is mainly a data container. It typically contains a Material object and geometry information.

Example:

aluminium = arim.Material(6300., 3100., 2700.)
exam_obj = arim.ExaminationObject(aluminium)

For performing immersion TFM or using the forward model, the geometry of the front and back walls and the material of the couplant are needed. The BlockInImmersion, a subclass of ExaminationObject, can be used for storing this information.

Example:

# material definition
block_material = arim.Material(6300., 3100., 2700., 'solid', metadata=dict(long_name='Aluminium'))
couplant_material = arim.Material(1480., None, 1000.., 'liquid', metadata=dict(long_name='Water')))

# define the geometry
numpoints = 500
z_frontwall = 0.e-3
xmin = 0e-3
xmax = 20e-3
frontwall = arim.geometry.points_1d_wall_z(xmin, xmax, z_frontwall, numpoints)
backwall = arim.geometry.points_1d_wall_z(xmin, xmax, z_backwall, numpoints)

exam_obj = arim.BlockInImmersion(block_material, couplant_material, frontwall, backwall)

The front and back walls are defined as clouds of points. Using a fine enough sampling is important for the precision of the ray tracing and the model.

See also

More about the definition of the geometry: arim.geometry

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