Optical: systems and elements – Holographic system or element – Copying by holographic means
Patent
1994-12-20
1996-11-19
Henry, Jon W.
Optical: systems and elements
Holographic system or element
Copying by holographic means
359 8, G03H 120
Patent
active
055768539
ABSTRACT:
Apparatus and methods are provided for mass production of transmission holograms onto a continuous web of photosensitive material, one method involving the mounting of a master transmission hologram onto the outside surface of a clear hollow drum, the clear hollow drum being rotatable and having means for directing an irradiating wavefront propagated from a radiation source through the master transmission hologram onto a passing recording medium in a predetermined direction, the directing means configured so that said predetermined direction is fixedly maintainable independent of the rotation of the hollow drum and the master transmission hologram mounted thereon. The redirected irradiating wavefront transmitted through the master transmission hologram generates an object beam and a "zero order" reference beam, said object beam and "zero order" reference beam combine to form an interference pattern, the interference pattern being recorded on the photosensitive recording medium.
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Molteni William J.
Wenyon Michael M.
de Luna Renato M.
Henry Jon W.
Polaroid Corporation
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