We have developed a laser interferometer with the goal of precise measurement of the pixel MTF and pixel crosstalk in camera sensors. One of the advantages of our interferometric method for measuring sensor MTF is that the sinusoidal illumination pattern is formed directly on the sensor rather than beamed through a lens. This allows for a precise measurement of sensor MTF and crosstalk unaltered by the lens. Another advantage is that we measure MTF in a wide range of spatial frequencies reaching high above the Nyquist frequency. We discuss the theory behind the expected and observed sensor performance, and show our experimental results. Our comparison with the Slanted Edge method shows that we have better precision and cover a wider range of frequencies.
Todor Georgiev, Jennifer Gille, Amber Sun, Lyubomir Baev, Tharun Battula, "Interferometric Measurement of Sensor MTF and Crosstalk" in Proc. IS&T Int’l. Symp. on Electronic Imaging: Digital Photography and Mobile Imaging XIII, 2017, pp 52 - 57, https://doi.org/10.2352/ISSN.2470-1173.2017.15.DPMI-079