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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 5 — Mar. 1, 2006
  • pp: 565–567

Optics InfoBase > Optics Letters > Volume 31 > Issue 5 > Page 565

Effect of wavefront error on 10−7 contrast measurements

Julia W. Evans, Gary Sommargren, Bruce A. Macintosh, Scott Severson, and Daren Dillon  »View Author Affiliations


Optics Letters, Vol. 31, Issue 5, pp. 565-567 (2006)
http://dx.doi.org/10.1364/OL.31.000565


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Abstract

We have measured a contrast of 6.5 × 10 − 8 from 10 to 25   λ ∕ D in visible light on the Extreme Adaptive Optics testbed, using a shaped pupil for diffraction suppression. The testbed was designed with a minimal number of high-quality optics to ensure low wavefront error and uses a phase-shifting diffraction interferometer for metrology. This level of contrast is within the regime needed for imaging young Jupiter-like planets, a primary application of high-contrast imaging. We have concluded that wavefront error, not pupil quality, is the limiting error source for improved contrast in our system.

© 2006 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(050.1220) Diffraction and gratings : Apertures

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: October 11, 2005
Manuscript Accepted: November 10, 2005

Citation
Julia W. Evans, Gary Sommargren, Bruce A. Macintosh, Scott Severson, and Daren Dillon, "Effect of wavefront error on 10−7 contrast measurements," Opt. Lett. 31, 565-567 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-5-565

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