The problem with other tutorials is that they were not written by me. These were.
Steven L. Jacques (email@example.com), Scott A. Prahl (firstname.lastname@example.org)
This was 3-quarter series of 4-credit graduate courses that provided a foundation in physics and mathematics for engineers to design optical instrumentation for biomedical applications. It was taught nearly twenty years ago. Here are a few of the on-line resources.
A little milk scattering demo put together by Martin Ostermeyer and Steve Jacques.