A new method has been developed to measure the modulation transfer function (MTF) of an array out to the Nyquist frequency without high quality optical or mechanical components, without precision alignment, and with only one moving part. Test results for an infrared staring array of PtSi Schottky barrier construction show that this technique is a viable MTF measurement approach in the 3 to 5 µm spectral region.
E. L. Dereniak,
"Method For Measuring Modulation Transfer Function Of Charge-Coupled Devices Using Laser Speckle," Optical Engineering 25(1), 250148 (1 January 1986). https://doi.org/10.1117/12.7973792