Online image selection for the Italian Telescopio Nazionale Galileo (TNG): numerical simulation and performance evaluation

Carlo Morossi; Mariagrazia Franchini; Sergio Furlani; Giorgio Sedmak

doi:10.1117/12.290166

17 October 1997 Online image selection for the Italian Telescopio Nazionale Galileo (TNG): numerical simulation and performance evaluation

Carlo Morossi, Mariagrazia Franchini, Sergio Furlani, Giorgio Sedmak

Author Affiliations +

Proceedings Volume 3126, Adaptive Optics and Applications; (1997) https://doi.org/10.1117/12.290166
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

The possibility of improving the image quality of the Italian “Telescopio Nazionale Galileo (TNG)” by means of on-line image selection via a fast shutter is discussed. The different performances obtainable with different shutter speeds, selection rates and sharpness criteria are derived by the analysis of temporal series of simulated short exposure images of atmospheric speckles. The speckles are obtained by drifting large format phase screens of von Kármán statistics over the telescope pupil. The phase screens are generated by FFT transforming a white noise of controlled quality and by adding subharmonics to approximate the low frequency pattern. Particular attention is devoted to the identification of the most suitable merit function(s) for on-line image selection and to the comparison of the achievable image quality improvements with those obtainable through off-line selection and co-addition post-processing techniques.

Citation Download Citation

Carlo Morossi, Mariagrazia Franchini, Sergio Furlani, and Giorgio Sedmak "Online image selection for the Italian Telescopio Nazionale Galileo (TNG): numerical simulation and performance evaluation", Proc. SPIE 3126, Adaptive Optics and Applications, (17 October 1997); https://doi.org/10.1117/12.290166

ACCESS THE FULL ARTICLE

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