초록 ▼

A switchable holographic device generally comprises a substrate having two generally opposed surfaces and a plurality of holographic fringes recorded in the substrate. The holographic fringes are configured to switch between active and passive states upon application of an electrical field. One or m

A switchable holographic device generally comprises a substrate having two generally opposed surfaces and a plurality of holographic fringes recorded in the substrate. The holographic fringes are configured to switch between active and passive states upon application of an electrical field. One or more of the plurality of holographic fringes are positioned such that a surface of the fringe is angled relative to one of the substrate surfaces. The holographic device further comprises a pair of electrodes each positioned generally adjacent to one of the substrate surfaces and operable to apply an electrical field to the fringes to switch the fringes between their active and passive states. One of the pair of electrodes has a plurality of independently controlled segments. Each of the segments is positioned over an area of the substrate having holographic fringes positioned within a common range of angles relative to the substrate surface.

대표청구항 ▼

[ What is claimed is:] [1.]1. A switchable holographic device comprising:a substrate having two generally opposed surfaces;a plurality of holographic fringes recorded in the substrate and configured to switch between active and passive states upon application of an electrical field, one or more of s

[ What is claimed is:] [1.]1. A switchable holographic device comprising:a substrate having two generally opposed surfaces;a plurality of holographic fringes recorded in the substrate and configured to switch between active and passive states upon application of an electrical field, one or more of said plurality of holographic fringes positioned such that a surface of the fringe is angled relative to one of the substrate surfaces; anda pair of electrodes each positioned generally adjacent to one of the substrate surfaces and operable to apply an electrical field to the fringes to switch the fringes between their active and passive states, one of said pair of electrodes having a plurality of independently controlled segments, each of the segments positioned over an area of the substrate having holographic fringes positioned within a common range of angles relative to the substrate surface.