As the meaning of “canonical”, the linear canonical transform (LCT) is a scalable transform that connects to lots of important kernels such as the Fresnel transform, Fraunhofer transform and the fractional Fourier transform.
A Fresnel lens that was associated with this light was donated and is now on display at the Beaver Island Head Light.
Born in La Ferté-Fresnel, Paul Bunel settled in Vimoutiers from where he traversed the Pays d'Auge in Lower-Normandy, France, to photograph villages, people and Norman costumes of the beginning of the 20th century.
In 2008, the Fresnel lens was relocated to Quilter Lodge in Maumee Bay State Park, which is within sight of the Toledo Harbor Lighthouse on clear days.