Sub-pixel resolution with color X-ray camera SLcam(R)

TL;DR

This paper introduces a novel sub-pixel resolution algorithm for the color X-ray SLcam(R), enhancing spatial resolution by distinguishing signals from individual capillary channels using advanced numerical methods.

Contribution

A new sub-pixel resolution algorithm that includes photon events from pixel centers, improving spatial resolution beyond pixel size limitations.

Findings

Enhanced spatial resolution demonstrated with numerical examples

Sub-pixel algorithm distinguishes signals from individual channels

Method improves imaging detail in X-ray detection

Abstract

The color X-ray camera SLcam(R) is a full-field, single photon detector providing scanning free, energy and spatially resolved X-ray imaging. Spatial resolution is achieved with the use of polycapillary optics guiding X-ray photons from small regions on a sample to distinct energy dispersive pixels on a CCD. Applying sub-pixel resolution, signals from individual capillary channels can be distinguished. Accordingly the SLcam(R) spatial resolution can be released from pixel size being confined rather to a diameter of individual polycapillary channels. In this work a new approach to sub-pixel resolution algorithm comprising photon events also from the pixel centers is proposed. The details of the employed numerical method and several sub-pixel resolution examples are presented and discussed.