2.3.3.3.51. NXbeam_transfer_matrix_table

Status:

base class, extends NXobject

Description:

Contains datastructures of an experimental optical setup (i.e., multiple ...

Contains datastructures of an experimental optical setup (i.e., multiple transfermatrix tables). These datastructures are used to relate physical properties of two beams (NXbeam) which have one common optical element (NXopt_element) (one specific transfermatrix). One of these beams in an input beam and the other one is an output beam.

The data describes the change of beam properties, e.g. the intensity of a beam is reduced because the transmission coefficient of the beam device is lower than 1.

Symbols:

Variables used throughout the document, e.g. dimensions or parameters.

N_variables: Length of the array associated to the data type.

Groups cited:

none

Structure:

datatype_N: (optional) NX_CHAR

Select which type of data was recorded, for example aperture and ...

Select which type of data was recorded, for example aperture and focal length. It is possible to have multiple selections. This selection defines how many columns (N_variables) are stored in the data array. N in the name, is the index number in which order the given property is listed.

Any of these values:

  • aperture

  • focallength

  • orientation

  • jones matrix

matrix_elements: (optional) NX_CHAR (Rank: 1, Dimensions: [N_variables])

Please list in this array the column and row names used in your actual data. ...

Please list in this array the column and row names used in your actual data. That is in the case of aperture [‘diameter’] or focal length [‘focal_length_value’] and for orientation matrix [‘OM1’, ‘OM2’, ‘OM3’] or for jones matrix [‘JM1’,’JM2’]

TRANSFER_MATRIX: (optional) NX_NUMBER (Rank: 2, Dimensions: [N_variables, N_variables])

Contains the datastructure which relates beam properties of an ...

Contains the datastructure which relates beam properties of an input and output beam as result of the input beam interaction with the beam device.

Transfermatrix relationship between N input beams and M output beams. It contains a table with the relevant matricis to be used for different transmissitted properties (such as polarization, intensity, phase).

Data structure for all transfermatrices of an beam device in a setup. For each combination of N input and M output beams and for L physical concept (i.e. beam intensity), one matrix can be defined.

In this way, the transfermatrix table has the dimension NxM.

For each entry, in this transfermatrix, there are L formalisms. Each formalism has the dimension math:dim(L_i)xdim(L_i), whereby math:L_i is the specific physical concept (Intensity, polarization, direction).

A beamsplitter with two input laser beams can have a total of four transfermatrices (2 Input x 2 Output).

The dimension of the transfermatrix depends on the parameters. Examples are: 1x1 for intensity/power 2x2 for jones formalism 3x3 for direction

@input: (optional) NX_CHAR

Specific name of input beam which the transfermatrix table is related to.

@output: (optional) NX_CHAR

Specific name of output beam which the transfermatrix table is related to.

Hypertext Anchors

List of hypertext anchors for all groups, fields, attributes, and links defined in this class.

NXDL Source:

https://github.com/FAIRmat-NFDI/nexus_definitions/tree/fairmat/contributed_definitions/NXbeam_transfer_matrix_table.nxdl.xml