Collaborator
Lloyd Cross
A pioneer of holography and the multiplex hologram. Paul met Lloyd at the School of Holography in San Francisco; they were friends and collaborators for decades, and are named together on the Image Mover patent.
Lloyd G. Cross was a pioneer of holography — closely associated with the development of the multiplex (integral) hologram — whose work bridged optical science and art.
Paul met Lloyd during college, while attending classes at the School of Holography in San Francisco. The two became friends and worked on and off together on a number of projects over the decades, right up until Lloyd’s passing in 2015. Among that work: they are named together on U.S. Patent 5,365,288, Image Mover (1994) at Advanced Laser Projection.
Cross’s lifelong expertise in bending and reconstructing light with precision made him a fitting collaborator on a patent about steering a projected image through optics.
The technique
How a multiplex hologram works
Record the motion
The subject turns on a turntable while a movie camera shoots a full sequence of frames — one slightly different view for every angle.
Transfer each frame
Laser light records each frame as one narrow vertical strip on holographic film — hundreds of slits standing side by side, each holding a different view.
View in three dimensions
Curved into a cylinder and lit from below, the strips replay as a three-dimensional image — a different view to each eye, and it moves as you walk around it.