Adaptive interferometric null testing for unknown freeform optics metrology
Posted on 2017-04-26 - 18:38
We report an adaptive interferometric null testing method for overcoming the dynamic range limitations of conventional null testing approaches during unknown freeform optics metrology or optics manufacturing processes that require not-yet-completed surface measurements to guide the next fabrication process. In the presented adaptive method, a deformable mirror functions as an adaptable null component for an unknown optical surface. The optimal deformable mirror’s shape is determined by the stochastic parallel gradient descent algorithm and controlled by a deflectometry system. An adaptive interferometric null testing setup was constructed, and its metrology data successfully demonstrated superb adaptive capability in measuring an unknown surface.
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Huang, Lei; Choi, Heejoo; Zhao, Wenchuan; Graves, Logan R.; Wook Kim, Dae (2016). Adaptive interferometric null testing for unknown freeform optics metrology. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.3755354.v1
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AUTHORS (5)
LH
Lei Huang
HC
Heejoo Choi
WZ
Wenchuan Zhao
LG
Logan R. Graves
DW
Dae Wook Kim