Design and specification of optical bandpass filters for hubble space telescope (HST) advanced camera for surveys (ACS)

Douglas B. Leviton, Ziatan Tsvetanov, Robert A. Woodruff, Thomas A. Mooney

Research output: Contribution to journalConference article

9 Citations (Scopus)


Advanced optical bandpass filters for the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) have been developed on a filter-by-filter basis through detailed studies which take into account the instrument's science goals, available optical filter fabrication technology, and developments in ACS's charge-coupled-device detector technology. These filters include a subset of filters for the Sloan Digital Sky Survey (SDSS) which are optimized for astronomical photometry using today's charge-coupled-devices(CCD's). 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 for these filters include outstanding transmitted wavefront, high transmittance, uniform transmittance across each filter, spectrally structure-free bandpasses, exceptionally high out of band rejection, a high degree of parfocality, and immunity to environmental degradation. These constitute a very stringent set of requirements indeed, especially for filters which are up to 90 mm in diameter. The highly successful paradigm in which final specifications for flight filters were derived through interaction amongst the ACS Science Team, the instrument designer, the lead optical engineer, and the filter designer and vendor is described. Examples of iterative design trade studies carried out in the context of science reeds and budgetary and schedule constraints are presented. An overview of the final design specifications for the ACS bandpass and ramp filters is also presented.

Original languageEnglish
Pages (from-to)308-320
Number of pages13
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1 Dec 1998
EventSpace Telescopes and Instruments V - Kona, HI, United States
Duration: 20 Mar 199820 Mar 1998



  • Bandpass filters
  • Color filter glass
  • Focal shift
  • Out-of-band rejection
  • Parfocality
  • Passband
  • Ramp filters
  • Spectral transmittance
  • Transmitted wavefront

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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