Micro pore optical (MPO) device is a novel X-ray optical component with a unique 4 solid-angle focusing capability and large effective area for specified weight ratio, which meet the requirements of the applications in modern X-ray astronomy. The focusing performance of flat MPO is a key factor affecting the detection capability of the finished device used for Lobster eye X-ray telescope. In this paper, to study the optical properties of the flat plate, we performed both numerical simulation and experimental measurements. The measured focal distance was 3650 mm  10 mm. The full width at half maximum of the measured focal spot in the vertical and horizontal direction was 1.83 mm and 3.27 mm, respectively. And the corresponding angular resolution was 1.73 arcmins and 3.08 arcmins. The simulation results showed that these two kinds of channel errors have a great influence on the point spread function of this device, which was in good agreement with the test results. In order to obtain the influence of the optical characteristics of the planar MPO on the PSF shape, a set of X-ray point-to-point testing equipment for the planar MPO was developed. Combined with the scanning test results of different areas, it was found that the planar MPO exists Tilt and Distort errors. In addition, the project team will carry out the development and testing of the spherical surface slumping of the planar MPO, and study the influence of the spherical surface quality.

With Regards,
Sara Giselle
Associate Managing Editor
Journal of Medical Physics and Applied Sciences