High-modulation camera for use with a non-null interferometer

Robert O. Gappinger, John E. Greivenkamp, Claudia Borman

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

High-frequency fringe patterns found in non-null interferometric testing of aspheres require the use of special detector arrays containing small, widely spaced pixels. A sparse array camera with the ability to detect high spatial frequencies has been developed. The modulation transfer function (MTF) of the camera is measured using a sinusoidal fringe pattern generated by a Mach-Zehnder interferometer. Spatial frequencies up to 400 cycles/mm are generated and used to characterize the MTF of the camera.

Original languageEnglish (US)
Pages (from-to)689-696
Number of pages8
JournalOptical Engineering
Volume43
Issue number3
DOIs
StatePublished - Mar 2004

Keywords

  • Aliasing
  • High-frequency detector
  • Modulation transfer function testing
  • Non-null interferometer
  • Sparse array sensor
  • SubNyquist interferometry

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)

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