.. auto-generated by dev_tools.docs.nxdl from the NXDL source base_classes/NXfresnel_zone_plate.nxdl.xml -- DO NOT EDIT .. index:: ! NXfresnel_zone_plate (base class) ! fresnel_zone_plate (base class) see: fresnel_zone_plate (base class); NXfresnel_zone_plate .. _NXfresnel_zone_plate: ==================== NXfresnel_zone_plate ==================== .. Contributors List .. |contrib_name| replace:: Aaron Brewster|phyy-nx|https://avatars.githubusercontent.com/u/13471434?v=4|2022-06-15 .. |contrib_name| replace:: Pete R Jemian|prjemian|https://avatars.githubusercontent.com/u/2279984?v=4|2022-01-28 .. |contrib_name| replace:: Peter Chang|PeterC-DLS|https://avatars.githubusercontent.com/u/1381719?v=4|2020-10-20 .. |contrib_name| replace:: Tobias Richter|zjttoefs|https://avatars.githubusercontent.com/u/856440?v=4|2018-05-15 .. |contrib_name| replace:: Benajamin|benajamin|https://avatars.githubusercontent.com/u/10222548?v=4|2015-02-04 **Status**: base class, extends :ref:`NXobject` **Description**: A fresnel zone plate **Symbols**: No symbol table **Groups cited**: :ref:`NXtransformations` .. index:: NXtransformations (base class); used in base class **Structure**: .. _/NXfresnel_zone_plate@default-attribute: .. index:: default (file attribute) **@default**: (optional) :ref:`NX_CHAR ` .. collapse:: Declares which child group contains a path leading ... .. index:: plotting Declares which child group contains a path leading to a :ref:`NXdata` group. It is recommended (as of NIAC2014) to use this attribute to help define the path to the default dataset to be plotted. See https://www.nexusformat.org/2014_How_to_find_default_data.html for a summary of the discussion. .. _/NXfresnel_zone_plate/focus_parameters-field: .. index:: focus_parameters (field) **focus_parameters**: (optional) :ref:`NX_FLOAT ` (Rank: 1) .. collapse:: list of polynomial coefficients describing the focal length of the zone plate, ... list of polynomial coefficients describing the focal length of the zone plate, in increasing powers of photon energy, that describes the focal length of the zone plate (in microns) at an X-ray photon energy (in electron volts). .. _/NXfresnel_zone_plate/outer_diameter-field: .. index:: outer_diameter (field) **outer_diameter**: (optional) :ref:`NX_FLOAT ` {units=\ :ref:`NX_LENGTH `} .. _/NXfresnel_zone_plate/outermost_zone_width-field: .. index:: outermost_zone_width (field) **outermost_zone_width**: (optional) :ref:`NX_FLOAT ` {units=\ :ref:`NX_LENGTH `} .. _/NXfresnel_zone_plate/central_stop_diameter-field: .. index:: central_stop_diameter (field) **central_stop_diameter**: (optional) :ref:`NX_FLOAT ` {units=\ :ref:`NX_LENGTH `} .. _/NXfresnel_zone_plate/fabrication-field: .. index:: fabrication (field) **fabrication**: (optional) :ref:`NX_CHAR ` .. collapse:: how the zone plate was manufactured ... how the zone plate was manufactured Any of these values: ``etched`` | ``plated`` | ``zone doubled`` | ``other`` .. _/NXfresnel_zone_plate/zone_height-field: .. index:: zone_height (field) **zone_height**: (optional) :ref:`NX_FLOAT ` {units=\ :ref:`NX_LENGTH `} .. _/NXfresnel_zone_plate/zone_material-field: .. index:: zone_material (field) **zone_material**: (optional) :ref:`NX_CHAR ` Material of the zones themselves .. _/NXfresnel_zone_plate/zone_support_material-field: .. index:: zone_support_material (field) **zone_support_material**: (optional) :ref:`NX_CHAR ` Material present between the zones. This is usually only present for the "zone doubled" fabrication process .. _/NXfresnel_zone_plate/central_stop_material-field: .. index:: central_stop_material (field) **central_stop_material**: (optional) :ref:`NX_CHAR ` .. _/NXfresnel_zone_plate/central_stop_thickness-field: .. index:: central_stop_thickness (field) **central_stop_thickness**: (optional) :ref:`NX_FLOAT ` {units=\ :ref:`NX_LENGTH `} .. _/NXfresnel_zone_plate/mask_thickness-field: .. index:: mask_thickness (field) **mask_thickness**: (optional) :ref:`NX_FLOAT ` {units=\ :ref:`NX_LENGTH `} .. _/NXfresnel_zone_plate/mask_material-field: .. index:: mask_material (field) **mask_material**: (optional) :ref:`NX_CHAR ` If no mask is present, set mask_thickness to 0 and omit the mask_material field .. _/NXfresnel_zone_plate/support_membrane_material-field: .. index:: support_membrane_material (field) **support_membrane_material**: (optional) :ref:`NX_CHAR ` .. _/NXfresnel_zone_plate/support_membrane_thickness-field: .. index:: support_membrane_thickness (field) **support_membrane_thickness**: (optional) :ref:`NX_FLOAT ` {units=\ :ref:`NX_LENGTH `} .. _/NXfresnel_zone_plate/depends_on-field: .. index:: depends_on (field) **depends_on**: (optional) :ref:`NX_CHAR ` .. collapse:: NeXus positions components by applying a set of translations and rotations ... NeXus positions components by applying a set of translations and rotations to apply to the component starting from 0, 0, 0. The order of these operations is critical and forms what NeXus calls a dependency chain. The depends_on field defines the path to the top most operation of the dependency chain or the string "." if located in the origin. Usually these operations are stored in a NXtransformations group. But NeXus allows them to be stored anywhere. .. todo:: Add a definition for the reference point of a fresnel zone plate. .. _/NXfresnel_zone_plate/TRANSFORMATIONS-group: **TRANSFORMATIONS**: (optional) :ref:`NXtransformations` .. collapse:: "Engineering" position of the fresnel zone plate ... "Engineering" position of the fresnel zone plate This is the group recommended for holding the chain of translation and rotation operations necessary to position the component within the instrument. The dependency chain may however traverse similar groups in other component groups. Hypertext Anchors ----------------- List of hypertext anchors for all groups, fields, attributes, and links defined in this class. * :ref:`/NXfresnel_zone_plate/central_stop_diameter-field ` * :ref:`/NXfresnel_zone_plate/central_stop_material-field ` * :ref:`/NXfresnel_zone_plate/central_stop_thickness-field ` * :ref:`/NXfresnel_zone_plate/depends_on-field ` * :ref:`/NXfresnel_zone_plate/fabrication-field ` * :ref:`/NXfresnel_zone_plate/focus_parameters-field ` * :ref:`/NXfresnel_zone_plate/mask_material-field ` * :ref:`/NXfresnel_zone_plate/mask_thickness-field ` * :ref:`/NXfresnel_zone_plate/outer_diameter-field ` * :ref:`/NXfresnel_zone_plate/outermost_zone_width-field ` * :ref:`/NXfresnel_zone_plate/support_membrane_material-field ` * :ref:`/NXfresnel_zone_plate/support_membrane_thickness-field ` * :ref:`/NXfresnel_zone_plate/TRANSFORMATIONS-group ` * :ref:`/NXfresnel_zone_plate/zone_height-field ` * :ref:`/NXfresnel_zone_plate/zone_material-field ` * :ref:`/NXfresnel_zone_plate/zone_support_material-field ` * :ref:`/NXfresnel_zone_plate@default-attribute ` **NXDL Source**: https://github.com/nexusformat/definitions/blob/main/base_classes/NXfresnel_zone_plate.nxdl.xml