Surface treatment of photopolymer film used for recording holograms

Abstract

Abstract TECHNIQUES FOR TREATING AND HANDLING PHOTOPOLYMER FILM UTILIZED TO RECORD IN THE VISIBLE OR NEAR VISIBLE RANGE AN ELECTROMAGNETIC RADIATION PATTERN SUCH AS A HOLOGRAPHIC INTERFERENCE PATTERN. PRIOR TO EXPOSURE OF A PHOTOPOLYMERIZABLE FILM MATERIAL TO THE RADIATION PATTERN, THE FILM IS POLYMERIZED AT ITS SURFACE PRIMARILY TO IMPROVE MECHANICAL RIGIDITY OF THE FILM. A PROCESS OF MANUFACTURING ELONGATED PHOPOLYMERIZABLE RECORDING FILM INCLUDES EXTRUDING A LIQUID MONOMER COMPOSITION ONTO A SUBSTRATE AND POLYMERIZING THE MONOMER COMPOSITION AT LEAST AT ITS SURFACE BEFORE THE MATERIAL IS ROLLED OR OTHERWISE SUBJECTED TO MECHANICAL STRESSES. A TECHN IQUE FOR COPYING A MASTER HOLOGRAPHIC MOVIE ONTO PHOTOPOLYMERIZABLE FILM INCLUDES ECTRUDING A LIQUID MONOMER COMPOSITION ONTO THE HOLOGRAPHIC MOVIE, EXPOSING THE MONOMER LAYER TO THE HOLOGRAPHIC INFORMATION RECORDED ON THE MASTER FILM, POLYMERIZING THE REMAINING MONOMER AND THEN SEPARATING THE NOW HARDENED POLYMERIZED FILM FROM THE MASTER MOVIE FILM.

Inventors

• 👤 Eugene J Sturdevant

Bibliographic Details