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Optical Metrology for the Filter Set for the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS)The Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) will employ a wide variety of spectral filtration components including narrow band, medium band, wide band, and far ultraviolet (FUV) long pass filters, spatially- variable filters (ramp filters), VIS/IR polarizers, NUV polarizers, FUV prisms, and a grism. These components are spread across ACS's Wide Field, High Resolution, and Solar Blind channels which provide diffraction-limited imaging of astronomical targets using aberration-correcting optics which remove most aberrations from HST's Optical Telescope Assembly (OTA). In order for ACS to be truly advanced, these filters must push the state-of-the-art in performance in a number of key areas at the same time. Important requirements which these filters must meet include outstanding transmitted wavefront, high transmittance, uniform transmittance across each filter, spectrally structure-free bandpasses, exceptionally high out of band rejection, and a high degree of parfocality. These constitute a very stringent set of requirements indeed, especially for filters which are up to 90 mm in diameter. The development of optical metrology stations used to demonstrate that each ACS filter will meet its design specifications is discussed. Of particular note are specially-designed spectral transmissometers and interferometers.
Document ID
19990093013
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Leviton, Douglas B.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Boucarut, Rene A.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Content, David A.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Keski-Kuha, Ritva A.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Krebs, Carolyn A.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Miner, Linda A.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Norton, Todd A.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Mehalick, Kimberly
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Petrone, Peter
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Bush, Frank D.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Puc, Bernard
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Standley, Clive
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Tsvetanov, Zlatan
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Kral, Catherine
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1998
Subject Category
Optics
Meeting Information
Meeting: Space Telescopes and Instruments V
Location: Kona, HI
Country: United States
Start Date: March 20, 1998
End Date: March 28, 1998
Sponsors: International Society for Optical Engineering
Distribution Limits
Public
Copyright
Other

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