Modulation transfer function measurement of sparse-array sensors using a self-calibrating fringe pattern

John E. Greivenkamp, Andrew E. Lowman

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

A simple method for the measurement of the pixel modulation transfer function (MTF) of sparse-array (extended MTF) sensors has been developed. We use a phase-shifting Twyman-Green interferometer to generate a series of single spatial-frequency fringe patterns incident on the sensor The resulting signal modulation is measured. We achieve self-calibration by restricting the measured spatial frequencies to multiples of the Nyquist frequency. The aliased patterns at these frequencies are unique and easily identifiable. Spatial frequencies of 480 cycles/mm are generated and measured. This frequency value is more than ten times that of the sensor sampling frequency. The expected MTF shape is obtained at multiples of the sampling frequency. At odd multiples of the Nyquist frequency, the MTF's are affected by the electronic bandwidth and cross talk in the charge-injection device sensor.

Original languageEnglish (US)
Pages (from-to)5029-5036
Number of pages8
JournalApplied optics
Volume33
Issue number22
DOIs
StatePublished - Aug 1994

Keywords

  • Chargeinjection devices
  • Focal plane arrays
  • Image sensors
  • Interferometry
  • Modulation transfer function

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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