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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 33, Iss. 22 — Aug. 1, 1994
  • pp: 5029–5036

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

John E. Greivenkamp and Andrew E. Lowman  »View Author Affiliations


Applied Optics, Vol. 33, Issue 22, pp. 5029-5036 (1994)
http://dx.doi.org/10.1364/AO.33.005029


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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.

© 1994 Optical Society of America

History
Original Manuscript: July 2, 1993
Revised Manuscript: December 7, 1993
Published: August 1, 1994

Citation
John E. Greivenkamp and Andrew E. Lowman, "Modulation transfer function measurement of sparse-array sensors using a self-calibrating fringe pattern," Appl. Opt. 33, 5029-5036 (1994)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-33-22-5029

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