Image distortion correction based on partial polynomial model for a large-array photon-counting detector

A microchannel plates (MCPs) photon-counting detector with a cross-delay line (XDL) is expected for high-quality and wide-field target imaging. However, it is a great challenge for the uniformity of system response as the increasing of effective detection area. In this article, we develop a XDL photon-counting detector with a wide field of 120 mm x 50 mm. Additionally, we investigate the origin of image distortion and propose a partial polynomial correction method to alleviate it. The experimental results show that the drift correction index is improved by around 60% under the proposed method, which confirms that the partial polynomial correction method has general applicability and high efficiency in addressing distortion issues.