中国科学院南京天文光学技术研究所机构知识库

Using an optical vortex coronagraph (OVC) is one of the most promising techniques for directly

imaging exoplanets because of its small inner working angle and high throughput。This paper

presents the design and laboratory demonstration performance of an OVC based on liquid crystal polymers (LCPs) at 633 nm and 1520 nm。The OVC can deliver good performance in laboratory tests and achieve a contrast of 10^-6 at an angular distance of 3λ/D, which can be implemented for imaging young giant exoplanets in combination with extreme adaptive optics。