Fourier Transform- An important tool for optics

Fourier transform gives relationship between the light distribution of a source and the light distribution appearing on a screen illuminated by the source. The amplitude distribution of light falling on a screen is provided by the Fourier transform of the source light distribution References S. Gupte, O. Masoud, R. Martin, and N. Papanikolopoulos, "Detection and classification of vehicles," IEEE Trans. Intelligent Transportation Systems, vol. 3, no. 1,