2.3.3.1.1. NXaberration¶
Status:
base class, extends NXobject
Description:
Quantified aberration coefficient in an aberration_model. ...
Quantified aberration coefficient in an aberration_model.
For an introduction in the details about aberrations with relevance for electron microscopy see R. Dunin-Borkowski et al. and S. J. Pennycock and P. D. Nellist (page 44ff, and page 118ff) for different definitions available and further details. Table 7-2 of Ibid. publication (page 305ff) documents how to convert from the Nion to the CEOS definitions. Conversion tables are also summarized by Y. Liao an introduction.
The use of the base class is not restricted to electron microscopy but can also be useful for classical optics.
Symbols:
No symbol table
- Groups cited:
none
Structure:
magnitude: (optional) NX_NUMBER {units=NX_ANY}
Magnitude of the aberration
magnitude_errors: (optional) NX_NUMBER {units=NX_ANY} ⤆
Uncertainty of the magnitude of the aberration
magnitude_errors_model: (optional) NX_CHAR
Free-text description how magnitude_errors was quantified ...
Free-text description how magnitude_errors was quantified e.g. via the 95% confidence interval, variance, standard deviation, using which algorithm or statistical model.
delta_time: (optional) NX_NUMBER {units=NX_TIME}
Time elapsed since the last measurement.
angle: (optional) NX_NUMBER {units=NX_ANGLE}
For the CEOS definitions the C aberrations are radial-symmetric and have ...
For the CEOS definitions the C aberrations are radial-symmetric and have no angle entry, while the A, B, D, S, or R aberrations are n-fold symmetric and have an angle entry. For the NION definitions the coordinate system differs to the one used in CEOS and instead two aberration coefficients a and b are used.
name: (optional) NX_CHAR
Given name to this aberration.
alias: (optional) NX_CHAR
Alias to name or refer to this specific type of aberration.
Hypertext Anchors¶
List of hypertext anchors for all groups, fields, attributes, and links defined in this class.
