Abstract
The previous development of a unique discrete modulation transfer function (DMTF) for infrared systems based on focal plane arrays has solved the multivalued problem which is associated with the non-isoplanatic nature of discrete systems. This paper proposes an efficient method for measuring this DMTF using random noise targets, which have a bandwidth equal to that of the collection optics but much larger than the Nyquist rate of the detector array. A microscan technique has been used in order to measure this DMTF beyond the passband of the detector array.
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