Flexible stitching interferometry for gull-wing asphere using variable-sign curvature compensation

Image stitching Aperture (computer memory)
DOI: 10.1364/ol.497098 Publication Date: 2023-07-25T15:40:48Z
ABSTRACT
Aspheres have widespread applications in modern optical systems; however, the high-precision testing of gull-wing asphere (GWA) is still challenging. In this Letter, flexible stitching interferometry (FSI) has been reported using variable-sign curvature compensation (VSCC) to realize accurate GWA testing. The method involves varying sign and magnitude outgoing wavefront by relative translation VSCC compensate for curvatures subapertures, alternating optimization utilized obtain full-aperture absolute phase. feasibility performance proposed are demonstrated experimentally. To our knowledge, such a here first time, could contribute general aspheric interferometry.
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