Optical metrology for the filter set for the hubble space telescope (lIST) advanced camera for surveys (ACS)

Douglas B. Leviton, Rene A. Boucarut, Frank D. Bush, David A. Content, Ritva A. KeskiKuha, Catherine Kral, Carolyn A. Krebs, Timothy J. Madison, Kimberly I. Mehalick, Linda A. Miner, Todd A. Norton, Peter Petrone, Bernard P. Puc, Clive Standley, Zlatan Tsvetanov, Frank Varosi

Research output: Contribution to journalArticle

9 Citations (Scopus)


The Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) employs a wide variety of spectral filtration components including nanow band, medium band, wide band, and far ultraviolet (FUV) long pass filters, spatiallyvariable filters (ramp filters), VISIIR 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 unique 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.

Original languageEnglish
Pages (from-to)350-360
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1998
Externally publishedYes



  • Focal shift
  • Index of refraction
  • Interferometry
  • Out-of-band rejection
  • Transmissometry
  • Transmitted wavefront

ASJC Scopus subject areas

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

Cite this

Leviton, D. B., Boucarut, R. A., Bush, F. D., Content, D. A., KeskiKuha, R. A., Kral, C., Krebs, C. A., Madison, T. J., Mehalick, K. I., Miner, L. A., Norton, T. A., Petrone, P., Puc, B. P., Standley, C., Tsvetanov, Z., & Varosi, F. (1998). Optical metrology for the filter set for the hubble space telescope (lIST) advanced camera for surveys (ACS). Proceedings of SPIE - The International Society for Optical Engineering, 3356, 350-360. https://doi.org/10.1117/12.324536