New concepts in vector-Apodizing Phase Plate coronagraphy

摘要: The vector-Apodizing Phase Plate (vAPP) is a pupil-plane coronagraph that manipulates phase to create dark holes in the stellar PSF. induced on circular polarization states through inherently achromatic geometric by spatially varying fast axis orientation of half-wave liquid-crystal layer. two polarized PSFs can be separated, either quarter-wave plate (QWP) followed polarizing beamsplitter (PBS) for broadband operation, or sensitive grating (PSG) narrowband IFS operation. Here we present new vAPP concepts lift restrictions previous designs and report their performance. We demonstrated QWP+PBS combination puts tight tolerances components prevent leakage non-coronagraphic light into dark-hole. design using an innovative two-stage patterned element system based multi-color holography, alleviating problem relaxing manufacturing tolerances. Furthermore, have shown focal-plane wavefront sensing (FPWFS) integrated asymmetric pupil. However, such vAPPs suffer from reduced throughput only been with PSG advanced maintain enable amplitude sensing. also FPWFS outline algorithm. Finally, dual-beam polarimetry one-sided were very complex. show significantly reduce complexity.