Upcoming Seminars


Past Seminars

January 23, 2017

Title: Edge Sensors for Segmented Mirrors

Future astronomical telescopes in space will have architectures that must meet complex and demanding requirements in order to meet science goals.  The missions now under consideration by NASA for imaging exoplanets and characterizing their atmospheres have technical challenges that are near or beyond the state of the art of telescope stability.  This colloquium describes segment edge sensing and control technologies developed for ground based telescopes, and shows how they might be used to stabilize space telescopes to picometer-class wavefront errors. 

Speakers:  Scott Knight (Ball Aerospace) Presentation,  Chris Shelton (JPL) Presentation

Seminar Recording

November 29, 2016

Title: Segmented Coronagraph Design and Analysis (SCDA) Study

Reaching high contrast ratios at close angular proximity to a star is an extremely challenging undertaking for a coronagraph with a filled-aperture telescope and is even more challenging with segmented, partially obscured apertures proposed for a large space-borne observatory. The primary goal of the ExEP-funded SCDA study is to identify coronagraph designs that maximize exo-Earth detectability with a variety of segmented apertures including hexagonal-segment and pie-wedge segment architectures. Both on-axis and off-axis designs are considered. The SCDA study is funding the design of pupil-plane, image-plane, and hybrid coronagraph designs. In this presentation, we discuss the progress in coronagraph designs and science yield performance since the study began in January 2016

Speakers: Stuart Shaklan (NASA-JPL) Presentation, Neil Zimmerman (STScI) Presentation,  Garreth Ruane (CIT) Presentation, Olivier Guyon (UA) & Rus Belikov (NASA-ARC) Presentation

Seminar Recording


The intention of these web seminars is to provide a forum for sharing key technology advances and results that enable or enhance the direct imaging and characterization of exoplanets. Topics may include recent coronagraph and starshade demonstration results, advances in detector technology, deformable mirrors, LOWFS/C, telescope stability, polarization, RV, starshade tutorials, etc. Our target audience is the engineers and scientists working on the WFIRST project and the HabEx and LUVOIR study concepts, but all are welcome to attend.

The series will be recorded and publically archived on this page so that they can be viewed at later dates.

To subscribe to the colloquium series, receive announcements, or suggest topics for future telecons, please contact Brendan Crill, Organizer