Study on the optical properties of Angel Lobster eye X-ray flat micro pore optical device

Micro pore optical (MPO) device is a novel X-ray optical component with a unique 4π 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.