Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Extreme wave front sensing accuracy for the Eclipse coronagraphic space telescope

[+] Author Affiliations
Joseph J. Green, David C. Redding, Stuart B. Shaklan, Scott A. Basinger

Jet Propulsion Lab. (USA)

Proc. SPIE 4860, High-Contrast Imaging for Exo-Planet Detection, 266 (February 25, 2003); doi:10.1117/12.457883
Text Size: A A A
From Conference Volume 4860

  • High-Contrast Imaging for Exo-Planet Detection
  • Alfred B. Schultz; Richard G. Lyon
  • Waikoloa, Hawai'i, USA | August 22, 2002

abstract

The Eclipse coronagraphic telescope will allow for high contrast imaging near a target star to facilitate planet finding. One key element will be its high accuracy, high authority deformable mirror (DM) that controls the wave front error (WFE) down to an acceptable level. In fact, to achieve the desired contrast ratio of nine orders of magnitude (in intensity) to within 0.35 arcseconds of the target star, the WFE in the telescope must be controlled to level below 1Ê rms within the controllable bandwidth of the DM. To achieve this extreme wave front sensing (WFS) accuracy, we employ a focus-diverse phase retrieval method extended from the Next Generation Space Telescope baseline approach. This method processes a collection defocused point-spread functions, measured at the occulting position in the Eclipse optical system, into a high accuracy estimate of the exit-pupil WFE. Through both simulation and hardware experiments, we examine and establish the key data requirements, such as the defocus levels and imaging signal-to noise level, that are necessary to obtain the desired WFS accuracy and bandwidth.

© (2003) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Joseph J. Green ; David C. Redding ; Stuart B. Shaklan and Scott A. Basinger
"Extreme wave front sensing accuracy for the Eclipse coronagraphic space telescope", Proc. SPIE 4860, High-Contrast Imaging for Exo-Planet Detection, 266 (February 25, 2003); doi:10.1117/12.457883; http://dx.doi.org/10.1117/12.457883


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.