CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 8864 > Article
Paper
26 September 2013 Estimate low- and high-order wavefront using P1640 calibrator measurements
C. Zhai, G. Vasisht, M. Shao, T. Lockhart, E. Cady, B. Oppenheimer, R. Burruss, J. Roberts, C. Beichman, D. Brenner, J. Crepp, R. Dekany, L. Hillenbrand, S. Hinkley, I. Parry, L. Pueyo, E. Rice, L. C. Roberts Jr., A. Sivaramakrishnan, R. Soummer, H. Tang, F. Vescelus, K. Wallace, N. Zimmerman
Author Affiliations +
Proceedings Volume 8864, Techniques and Instrumentation for Detection of Exoplanets VI; 88640L (2013) https://doi.org/10.1117/12.2024754
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States
Abstract
P1640 high contrast imaging system on the Palomar 200 inch Telescope consists of an apodized-pupil Lyot coronagraph, the PALM-3000 adaptive optics (P3K-AO), and P1640 Calibrator (CAL). Science images are recorded by an integral field spectrograph covering J-H bands for detecting and characterizing stellar companions. With aberrations from atmosphere corrected by the P3K-AO, instrument performance is limited mainly by the quasi-static speckles due to noncommon path wavefront aberrations for the light to propagate to the P3K-AO wavefront sensor and to the coronagraph mask. The non-common path wavefront aberrations are sensed by CAL, which measures the post-coronagraph E-field using interferometry, and can be effectively corrected by offsetting the P3K-AO deformable mirror target position accordingly. Previously, we have demonstrated using CAL measurements to correct high order wavefront aberrations, which is directly connected to the static speckles in the image plane. Low order wavefront, on the other hand, usually of larger amplitudes, causes light to leak through the coronagraph making the whole image plane brighter. Knowledge error in low order wavefront aberrations can also affect the estimation of the high order wavefront. Even though, CAL is designed to sense efficiently high order wavefront aberrations, the low order wavefront front can be inferred with less sensitivity. Here, we describe our method for estimating both low and high order wavefront aberrations using CAL measurements by propagating the post-coronagraph E-field to a pupil before the coronagraph. We present the results from applying this method to both simulated and experiment data.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
C. Zhai, G. Vasisht, M. Shao, T. Lockhart, E. Cady, B. Oppenheimer, R. Burruss, J. Roberts, C. Beichman, D. Brenner, J. Crepp, R. Dekany, L. Hillenbrand, S. Hinkley, I. Parry, L. Pueyo, E. Rice, L. C. Roberts Jr., A. Sivaramakrishnan, R. Soummer, H. Tang, F. Vescelus, K. Wallace, and N. Zimmerman "Estimate low- and high-order wavefront using P1640 calibrator measurements", Proc. SPIE 8864, Techniques and Instrumentation for Detection of Exoplanets VI, 88640L (26 September 2013); https://doi.org/10.1117/12.2024754
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 9 PAGES
DOWNLOAD PAPER SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Wavefronts
Coronagraphy
Error analysis
Calibration
Wavefront aberrations
Spatial frequencies
Monte Carlo methods
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top