Grazing incidence holograms and system and method for producing

Details Grazing incidence holograms and system and method for producing Grazing incidence holograms and system and method for producing

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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