Available Technology

An Algorithm for Estimating the Wavefront to be Measured by a Phase Retrieval Camera from an Image Captured by a Shack-Hatmann Camera

Phase retrieval (PR) and Shack-Hartmann Sensor (SHS) are the two preferred methods of image-based wavefront sensing widely used in various optical testbeds, adaptive optical systems, as well as ground- and space-based telescopes. They are used to recover the phase information of an optical system from defocused point source images (PR) and focused point source or extended scene images (SHS). For example, the Terrestrial Planet Finder Coronagraphs (TPF-Cs) High-Contrast Imaging Testbed (HCIT) uses a phase retrieval camera (PRC) to estimate and subsequently correct the phase error at the exit pupil of this optical system.
Internal Laboratory Ref #: 
NPO-47785-1
Patent Status: 
U.S. Government Purpose Release
Agency
NASA
Region
Far West
State: 
California
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