A single-shot common-path phase-stepping radial shearing interferometer for wavefront measurements

• DOI: 10.1364/oe.19.004703
• Publication Date: 2011-02-25T00:34:34Z
• Authors: Naiting Gu; Linhai Huang; Zeping Yang; Changhui Rao
• Keywords: Wavefront sensor; Shearing interferometer; Shearing (physics); Optical path; Deformable Mirror; Optical path length; Single shot

A single-shot common-path phase-stepping radial shearing interferometer (RSI) is proposed for wavefront measurements. In the RSI, three quarter-wave plates are used as phase shifters to produce four spatially separated fringe patterns that recorded simultaneously by a single CCD camera. The RSI can measure under test in real-time, and it also insensitive environmental vibration due its structure. Experimentally applied detect distorted wavefronts generated liquid crystal spatial light modulator. measured aberrations good agreement with obtained (by) Hartmann-Shack sensor, indicating useful tool