Evaluation of the modulation transfer function of an infrared focal plane array using the talbot effect

Abstract

The purpose of this paper is to describe a new procedure for evaluating the modulation transfer function (MTF) of an infrared focal plane array. This technique is based on the generalized line spread function method in which the MTF is derived from the image of a periodic target consisting of thin lines. The self-imaging property of this kind of object is used to project the target on to the tested focal plane array.