10 August 2010 Studies of the effects of actuator errors on the HCIT/PIAA contrast performance
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Abstract
The High Contrast Imaging Testbed Phase Induced Amplitude Apodization (HCIT/PIAA) coronagraph system at JPL relies on an Electric-Field Conjugation (EFC) wavefront correction algorithm to create a high contrast point-spread function (PSF). This algorithm works with one deformable mirror (DM) to estimate the electric-field to be controlled, and with one or multiple DM's to create a "dark-hole" in the image plane. We have investigated the effects of DM actuator errors on the efficiency of the EFC algorithm. The structural design of the optical system as well as the parameters of various optical elements used in the analysis are drawn from those of the HCIT/PIAA system that have been and will be implemented with one or two DM's. The simulation takes into account the surface errors of various optical elements. In this paper, we report our findings in the case of narrowband wavelength light.
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Erkin Sidick, Erkin Sidick, Stuart Shaklan, Stuart Shaklan, Brian Kern, Brian Kern, Amir Give'on, Amir Give'on, } "Studies of the effects of actuator errors on the HCIT/PIAA contrast performance", Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 77314T (10 August 2010); doi: 10.1117/12.858050; https://doi.org/10.1117/12.858050
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