We present a new technique for measuring the modulation transfer function (MTF) of a focal plane array (FPA). The main idea is to project a periodic pattern of thin lines that are canted with respect to the sensor’s columns. Practically, one aims the projection by using the self-imaging property of a periodic target. The technique, called the canted periodic target test, has been validated experimentally on a specific infrared FPA, leading to MTF evaluation to as great as five times the Nyquist frequency.
© 1999 Optical Society of America
(100.2550) Image processing : Focal-plane-array image processors
(110.3080) Imaging systems : Infrared imaging
(110.4100) Imaging systems : Modulation transfer function
(110.6760) Imaging systems : Talbot and self-imaging effects
Nicolas Guérineau, Jérôme Primot, Michel Tauvy, and Marcel Caes, "Modulation Transfer Function Measurement of an Infrared Focal Plane Array by Use of the Self-Imaging Property of a Canted Periodic Target," Appl. Opt. 38, 631-637 (1999)