4 papers · 1 filter
Reconstruction methods for the phase-shifted Zernike wavefront sensor
Vincent Chambouleyron, Mahawa Cissé, Maïssa Salama +8
The Zernike wavefront sensor (ZWFS) stands out as one of the most sensitive optical systems for measuring the phase of an incoming wavefront, reaching photon efficiencies close to…
Developing a Wyne Corrector for higher spectral bandwidth focal plane wavefront sensing
Dominic F. Sanchez, Benjamin L. Gerard, Bautista R. Fernandez +2
Focal plane wavefront sensing techniques are generally limited to using imaging systems that have below 1% spectral bandwidths, due to the radial smearing of speckles from chromati…
In-lab and On-sky Closed-loop Results of Adaptive Secondary Mirrors with TNO's Hybrid Variable Reluctance Actuators
Ruihan Zhang, Max Baeten, Mark R. Chun +8
We performed closed-loop lab testing of large-format deformable mirrors (DMs) with hybrid variable reluctance actuators. TNO has been developing the hybrid variable reluctance actu…
Laboratory demonstration of an all-fiber-based focal plane nulling interferometer
Jordan Diaz, Rebecca Jensen-Clem, Daren Dillon +6
Starlight suppression techniques for High-Contrast Imaging (HCI) are crucial to achieving the demanding contrast ratios and inner working angles required for detecting and characte…