Optical: systems and elements – Holographic system or element – Having particular recording medium
Patent
1996-01-31
1998-10-13
Spyrou, Cassandra
Optical: systems and elements
Holographic system or element
Having particular recording medium
359 34, 359900, G03H 102
Patent
active
058220895
ABSTRACT:
A method and system for recording and displaying grazing-incidence (i.e., steep reference beam angle) holograms supported on a substrate having thin edge-illuminatable geometry. The system and process of the present invention uses thin edge-illuminated substrates that facilitate optimal coupling of the reference light beam at steep angles approaching grazing incidence, while maximizing the contrast of the slanted fringe structures thereof. A recording medium is in direct contact with a thin substrate whose refractive index is greater than the bulk refractive index of the recording medium. At the substrate interface, the recording medium has a gradient-type index matching region, created by exposure of the recording medium to reference beam illumination, prior to the further application of an object beam to create a fringe pattern.
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Coleman Zane
Phillips Nicholas J.
ImEdge Technology Inc.
Jr. John Juba
Spyrou Cassandra
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