Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1997-08-05
2000-12-12
Parker, Kenneth
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
385115, 65425, 430321, 430290, G02F 11333, G03F 700
Patent
active
061606065
ABSTRACT:
Optical plates which have columnar features approximately in the direction of light propagation which are capable of total internal reflection, a controllable numeric aperture (NA) at input and output surfaces, rotational azimuthal averaging and translation of the object plane from a back surface of the plate to a front surface of the plate and are optical equivalent of a FOFP. These plates are made from a composition of irradiation sensitive glass which has been etched in either the columnar features or the surrounding features. If the surrounding features have been etched, the etched areas are filled with either a low melt glass or plastic or a light blocking material such as a black composition material. If the columnar features have been etched the etched areas are filled with a low melt glass or plastic. The resultant plates contain adjacent areas with differing refractive indices which result in a substrate containing a plurality of cylindrical features whose boundaries are defined by a discontinuity of refractive indices wherein the index of refraction within the cylindrical features is greater than the index of refraction at the boundaries and external to the cylindrical features.
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McBain Nola Mae
Parker Kenneth
Xerox Corporation
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