Leonard Mandel (May 9, 1927 – February 9, 2001) was the Lee DuBridge Professor Emeritus of Physics and Optics at the University of Rochester when he died at the age of 73 at his home in Pittsford, New York.
He contributed immensely to theoretical and experimental optics and is widely considered one of the founding fathers of the field of quantum optics.
With Emil Wolf he published the highly regarded book Optical Coherence and Quantum Optics.