For a number of years, optics, mainly in the area of diffraction, has been pursued with increasing vigor at Laval University. The present article summarizes the contributions of this French-Canadian group. After a brief historical outline, the following topics are surveyed: circular gratings, axially symmetrical diffraction patterns with both phase and amplitude variation, the factor of encircled energy and apodization, millimeter-wave optics, optical convolution, iterated diffraction in connection with beam waveguides and resonators, structure of focal region for wide angle systems, and holography.
Albéric Boivin, "Apport du Canada français aux progrés récents de I’optique," Appl. Opt. 6, 1625-1625 (1967)