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In this video, I go over the Fresnel diffraction integral, how to arrive at it, and how to put this integral into a more interesting form using convolution. I also briefly describe the concept of an optical transfer function, and figure out what this is for free-space propagation.

This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley.

Hope you found this video helpful, please post in the comments below anything I can do to improve future videos, or suggestions you have for future videos.