OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 2 — Jan. 10, 1998
  • pp: 361–368

Effect of CCD readout noise in astronomical speckle imaging

Jerome A. Zadnik and James W. Beletic  »View Author Affiliations


Applied Optics, Vol. 37, Issue 2, pp. 361-368 (1998)
http://dx.doi.org/10.1364/AO.37.000361


View Full Text Article

Enhanced HTML    Acrobat PDF (909 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

A theoretical and experimental comparison of photon-counting cameras and CCD’s for use in astronomical speckle imaging was performed. Photon-counting cameras able to detect single-photon events typically exhibit a lower quantum efficiency (QE) and suffer saturation effects at high light levels. In contrast, CCD’s offer a high QE and virtually unlimited photon-count rate. However CCD’s are limited at lower light levels by noise associated with the readout process. Speckle-imaging performance was quantified by derivation of the signal-to-noise ratio (SNR) of the power spectrum and the Knox–Thompson product to include CCD readout noise. Ground-based telescope observations at various light levels were obtained with an advanced, high-speed, low-noise CCD camera to verify SNR expressions. The useful operating ranges for these two camera types were compared by consideration of the effects of QE, readout noise, and maximum photon-count rate. Although photon-counting cameras continued to dominate low-light-level applications, CCD’s are shown to offer significant improvements over photon-counting cameras for a wide range of light levels. Future reductions of readout noise will further improve CCD speckle-imaging performance.

© 1998 Optical Society of America

OCIS Codes
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(030.4280) Coherence and statistical optics : Noise in imaging systems
(030.6610) Coherence and statistical optics : Stellar speckle interferometry
(040.1520) Detectors : CCD, charge-coupled device
(110.6150) Imaging systems : Speckle imaging

History
Original Manuscript: April 21, 1997
Revised Manuscript: September 5, 1997
Published: January 10, 1998

Citation
Jerome A. Zadnik and James W. Beletic, "Effect of CCD readout noise in astronomical speckle imaging," Appl. Opt. 37, 361-368 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-2-361

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited