Method for correcting timing skew in X-ray data read out of an X-ray detector in a rolling shutter mode

摘要

In an X-ray detector operating in a rolling shutter read out mode, by precisely synchronizing sample rotation with the detector readout, the effects of timing skew on the image intensities and angular positions caused by the rolling shutter read out can be compensated by interpolation or calculation, thus allowing the data to be accurately integrated with conventional software. In one embodiment, the reflection intensities are interpolated with respect to time to recreate data that is synchronized to a predetermined time. This interpolated data can then be processed by any conventional integration routine to generate a 3D model of the sample. In another embodiment a 3D integration routine is specially adapted to allow the time-skewed data to be processed directly and generate a 3D model of the sample.

主权项

1. A method for correcting timing skew in X-ray crystallographic reflection data that is produced by a sample, detected by an X-ray detector that has a plurality of pixels and read out of the detector in a rolling shutter mode, comprising integrating the reflection data with a 3D integration routine in which rotation equations that specify a rotation of a pixel based on a goniometer spindle position have been modified by replacing the goniometer spindle position with a spindle position that depends on the pixel readout time.