SPIEDL Logo

You are not logged in Logged Out Log In

Space telescope sensitivity and controls for exoplanet imaging

Opt. Eng. 51, 011002 (Feb 08, 2012); http://dx.doi.org/10.1117/1.OE.51.1.011002

Richard G. Lyon and Mark Clampin

NASA Goddard Space Flight Center, Greenbelt, Maryland 20771

We address design considerations and outline requirements for space telescopes with capabilities for high contrast imaging of exoplanets. The approach taken is to identify the span of potentially detectable Earth-sized terrestrial planets in the habitable zone of the nearest stars within 30 parsecs and estimate their inner working angles, flux ratios, SNR, sensitivities, wavefront error requirements, and sensing and control times parametrically versus aperture size. We consider 1, 2, 4, 8, and 16-m diameter telescope apertures. The achievable science, range of telescope architectures, and the coronagraphic approach are all active areas of research and are all subject to change in a rapidly evolving field. Thus presented is a snapshot of our current understanding with the goal of limiting the choices to those that appear currently technically feasible. We describe the top-level metrics of inner working angle, contrast and photometric throughput and explore how they are related to the range of target stars. A critical point is that for each telescope architecture and coronagraphic choice, the telescope stability requirements have differing impacts on the design for open- versus closed-loop sensing and control.

© 2012 Society of Photo-Optical Instrumentation Engineers

History
Received Sep 24, 2011
Accepted Nov 03, 2011
Revised Nov 02, 2011
Published online Feb 08, 2012
Corrected Feb 15, 2012
Citation
Richard G. Lyon and Mark Clampin, "Space telescope sensitivity and controls for exoplanet imaging", Opt. Eng. 51, 011002 (Feb 08, 2012); http://dx.doi.org/10.1117/1.OE.51.1.011002

DOWNLOAD ARTICLE

LOG IN or SELECT A PURCHASE OPTION:

EDITORIALLY RELATED

  1. Errata: Space telescope sensitivity and controls for exoplanet imaging
    Richard G. Lyon et al.
    Opt. Eng. 51, 039801 (2012)OPEGAR000051000003039801000001

RELATED CONTENT

More Like This Article


For access to fully linked references, you need to log in.

Close

close