.. 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
====================

**Status**:

  base class, extends :ref:`NXcomponent`

**Description**:

  A fresnel zone plate

**Symbols**:

  No symbol table

**Groups cited**:
  none

**Structure**:

  .. _/NXfresnel_zone_plate/focus_parameters-field:

  .. index:: focus_parameters (field)

  **focus_parameters**: (optional) :ref:`NX_FLOAT <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 <NX_FLOAT>` {units=\ :ref:`NX_LENGTH <NX_LENGTH>`} 


  .. _/NXfresnel_zone_plate/outermost_zone_width-field:

  .. index:: outermost_zone_width (field)

  **outermost_zone_width**: (optional) :ref:`NX_FLOAT <NX_FLOAT>` {units=\ :ref:`NX_LENGTH <NX_LENGTH>`} 


  .. _/NXfresnel_zone_plate/central_stop_diameter-field:

  .. index:: central_stop_diameter (field)

  **central_stop_diameter**: (optional) :ref:`NX_FLOAT <NX_FLOAT>` {units=\ :ref:`NX_LENGTH <NX_LENGTH>`} 


  .. _/NXfresnel_zone_plate/fabrication-field:

  .. index:: fabrication (field)

  **fabrication**: (optional) :ref:`NX_CHAR <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 <NX_FLOAT>` {units=\ :ref:`NX_LENGTH <NX_LENGTH>`} 


  .. _/NXfresnel_zone_plate/zone_material-field:

  .. index:: zone_material (field)

  **zone_material**: (optional) :ref:`NX_CHAR <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 <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 <NX_CHAR>` 


  .. _/NXfresnel_zone_plate/central_stop_thickness-field:

  .. index:: central_stop_thickness (field)

  **central_stop_thickness**: (optional) :ref:`NX_FLOAT <NX_FLOAT>` {units=\ :ref:`NX_LENGTH <NX_LENGTH>`} 


  .. _/NXfresnel_zone_plate/mask_thickness-field:

  .. index:: mask_thickness (field)

  **mask_thickness**: (optional) :ref:`NX_FLOAT <NX_FLOAT>` {units=\ :ref:`NX_LENGTH <NX_LENGTH>`} 


  .. _/NXfresnel_zone_plate/mask_material-field:

  .. index:: mask_material (field)

  **mask_material**: (optional) :ref:`NX_CHAR <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 <NX_CHAR>` 


  .. _/NXfresnel_zone_plate/support_membrane_thickness-field:

  .. index:: support_membrane_thickness (field)

  **support_membrane_thickness**: (optional) :ref:`NX_FLOAT <NX_FLOAT>` {units=\ :ref:`NX_LENGTH <NX_LENGTH>`} 


  .. _/NXfresnel_zone_plate/depends_on-field:

  .. index:: depends_on (field)

  **depends_on**: (optional) :ref:`NX_CHAR <NX_CHAR>` :ref:`⤆ </NXcomponent/depends_on-field>`

    .. collapse::   Add a definition for the reference point of a fresnel zone plate. ...

        .. todo::
          Add a definition for the reference point of a fresnel zone plate.



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 </NXfresnel_zone_plate/central_stop_diameter-field>`
* :ref:`/NXfresnel_zone_plate/central_stop_material-field </NXfresnel_zone_plate/central_stop_material-field>`
* :ref:`/NXfresnel_zone_plate/central_stop_thickness-field </NXfresnel_zone_plate/central_stop_thickness-field>`
* :ref:`/NXfresnel_zone_plate/depends_on-field </NXfresnel_zone_plate/depends_on-field>`
* :ref:`/NXfresnel_zone_plate/fabrication-field </NXfresnel_zone_plate/fabrication-field>`
* :ref:`/NXfresnel_zone_plate/focus_parameters-field </NXfresnel_zone_plate/focus_parameters-field>`
* :ref:`/NXfresnel_zone_plate/mask_material-field </NXfresnel_zone_plate/mask_material-field>`
* :ref:`/NXfresnel_zone_plate/mask_thickness-field </NXfresnel_zone_plate/mask_thickness-field>`
* :ref:`/NXfresnel_zone_plate/outer_diameter-field </NXfresnel_zone_plate/outer_diameter-field>`
* :ref:`/NXfresnel_zone_plate/outermost_zone_width-field </NXfresnel_zone_plate/outermost_zone_width-field>`
* :ref:`/NXfresnel_zone_plate/support_membrane_material-field </NXfresnel_zone_plate/support_membrane_material-field>`
* :ref:`/NXfresnel_zone_plate/support_membrane_thickness-field </NXfresnel_zone_plate/support_membrane_thickness-field>`
* :ref:`/NXfresnel_zone_plate/zone_height-field </NXfresnel_zone_plate/zone_height-field>`
* :ref:`/NXfresnel_zone_plate/zone_material-field </NXfresnel_zone_plate/zone_material-field>`
* :ref:`/NXfresnel_zone_plate/zone_support_material-field </NXfresnel_zone_plate/zone_support_material-field>`

**NXDL Source**:
  https://github.com/FAIRmat-NFDI/nexus_definitions/tree/fairmat/base_classes/NXfresnel_zone_plate.nxdl.xml