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Shaped pupil coronagraphy for WFIRST: high-contrast broadband testbed demonstration
- Source :
- Techniques and Instrumentation for Detection of Exoplanets VIII.
- Publication Year :
- 2017
- Publisher :
- SPIE, 2017.
-
Abstract
- The Shaped Pupil Coronagraph (SPC) is one of the two operating modes of the WFIRST (Wide-Field InfraRed Survey Telescope) coronagraph instrument. The SPC provides starlight suppression in a pair of wedge-shaped regions over an 18 percent bandpass, and is well suited for spectroscopy of known exoplanets. To demonstrate this starlight suppression in the presence of expected on-orbit input wavefront disturbances, we have recently built a dynamic testbed at JPL (Jet Propulsion Lab.) analogous to the WFIRST fight instrument architecture, with both Hybrid Lyot Coronagraph (HLC) and SPC architectures and a Low Order Wavefront Sensing and Control (LOWFS/C) subsystem to apply, sense, and correct dynamic wavefront disturbances. We present our best up-to-date results of the static SPC mode demonstration from the testbed, along with model comparisons and performance under realistic dynamical conditions. HLC results will be reported separately.
Details
- Database :
- OpenAIRE
- Journal :
- Techniques and Instrumentation for Detection of Exoplanets VIII
- Accession number :
- edsair.doi...........a6680557fa65da90c59097747697e3a5