Image restoration for the Hubble Space Telescope

Robert James Hanisch

doi:10.1117/12.176820

1 June 1994 Image restoration for the Hubble Space Telescope

Robert James Hanisch

Proceedings Volume 2198, Instrumentation in Astronomy VIII; (1994) https://doi.org/10.1117/12.176820
Event: 1994 Symposium on Astronomical Telescopes and Instrumentation for the 21st Century, 1994, Kailua, Kona, HI, United States

Abstract

The Hubble Space Telescope image quality was degraded significantly as a result of the spherical aberration in the primary mirror. Repairs made during the first servicing mission have restored HST's optical performance to the original design specifications. This paper examines not only how effective image restoration has been for the data from the first three and a half years of the mission, but also demonstrates the applicability of the same deconvolution algorithms to postservicing mission images. A variety of well-known image restoration techniques, such as Wiener filters, Richardson-Lucy, Jansson-van Cittert, CLEAN, and maximum entropy, have been applied to HST imaging with reasonable success. However, all techniques have been hampered by incomplete knowledge of the point spread function and the space variance of the point spread function (PSF) in the Wide Field/Planetary Camera, HST's most frequently used imager. After the servicing mission, the COSTAR-corrected Faint Object Camera acquires a space-variant PSF. Restoration is further complicated by time variance of the PSF resulting from both long-term and short-term (orbital period) changes in focus, problems which are not likely to be ameliorated by the servicing mission. Thus, it will be important to continue the efforts in modeling the HST optical system and apply deconvolution methods in order to attain the best scientific results from the telescope.

Citation Download Citation

Robert James Hanisch "Image restoration for the Hubble Space Telescope", Proc. SPIE 2198, Instrumentation in Astronomy VIII, (1 June 1994); https://doi.org/10.1117/12.176820

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Point spread functions

Image restoration

Cameras

Deconvolution

Image quality

Hubble Space Telescope

Data modeling

Show All Keywords

Keywords/Phrases

Search In:

Publication Years