Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Graded coronagraphic masks for high-contrast near-infrared imaging

[+] Author Affiliations
Joseph C. Carson

California Insititute of Technology and Jet Propulsion Lab.

Daniel W. Wilson, John T. Trauger

Jet Propulsion Lab.

Proc. SPIE 5905, Techniques and Instrumentation for Detection of Exoplanets II, 59051D (October 05, 2005); doi:10.1117/12.615935
Text Size: A A A
From Conference Volume 5905

  • Techniques and Instrumentation for Detection of Exoplanets II
  • Daniel R. Coulter
  • San Diego, California, USA | July 31, 2005

abstract

We present here results from an experimental and theoretical study in the use of graded focal-plane occulting masks to improve high-contrast astronomical imaging at near-infrared wavelengths. The study includes investigations of both high-energy beam sensitive (HEBS) glass (a product of Canyon Materials, San Diego, CA) and binary notch-filter technologies to create precision graded occulting masks. In conjunction with this investigation, we conduct computer simulations showing expected high-contrast levels for various graded masks being considered for installation in the PHARO camera of the Palomar 200-inch (5m) Hale Telescope Adaptive Optics (AO) system. Our results demonstrate that the implementation of a graded exponential mask in the Palomar system should improve high-contrast sensitivities by about 2.4-mag in K-band (2.0-2.4 μm), for 0.75-1.5 arcsec separations. We also demonstrate that both HEBS and binary notch-filter technologies present adequate platforms for necessary occulting requirements. We conclude with a discussion of theinsights our study yields for planned space-based high-contrast observatories such as NASA's planned Terrestrial Planet Finder Coronagraph (TPF-C) and the proposed Eclipse mission.

© (2005) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Joseph C. Carson ; Daniel W. Wilson and John T. Trauger
"Graded coronagraphic masks for high-contrast near-infrared imaging", Proc. SPIE 5905, Techniques and Instrumentation for Detection of Exoplanets II, 59051D (October 05, 2005); doi:10.1117/12.615935; http://dx.doi.org/10.1117/12.615935


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.