3.3.1.23. NXfresnel_zone_plate

Status:

base class, extends NXobject, version 1.0

Description:

A fresnel zone plate

Symbols:

No symbol table

Groups cited:

NXtransformations

Structure:

focus_parameters[]: NX_FLOAT

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).

outer_diameter: NX_FLOAT {units=NX_LENGTH}

outermost_zone_width: NX_FLOAT {units=NX_LENGTH}

central_stop_diameter: NX_FLOAT {units=NX_LENGTH}

fabrication: NX_CHAR

how the zone plate was manufactured

Any of these values: etched | plated | zone doubled | other

zone_height: NX_FLOAT {units=NX_LENGTH}

zone_material: NX_CHAR

Material of the zones themselves

zone_support_material: NX_CHAR

Material present between the zones. This is usually only present for the “zone doubled” fabrication process

central_stop_material: NX_CHAR

central_stop_thickness: NX_FLOAT {units=NX_LENGTH}

mask_thickness: NX_FLOAT {units=NX_LENGTH}

mask_material: NX_CHAR

If no mask is present, set mask_thickness to 0 and omit the mask_material field

support_membrane_material: NX_CHAR

support_membrane_thickness: NX_FLOAT {units=NX_LENGTH}

(transformations): NXtransformations

“Engineering” position of the fresnel zone plate

NXDL Source:

https://github.com/nexusformat/definitions/blob/master/base_classes/NXfresnel_zone_plate.nxdl.xml