Liquid crystal cells – elements and systems – Liquid crystal optical element
Reexamination Certificate
2006-03-07
2006-03-07
Parker, Kenneth (Department: 2871)
Liquid crystal cells, elements and systems
Liquid crystal optical element
C385S010000, C385S037000, C372S006000, C372S007000, C372S019000, C372S020000, C372S096000, C372S102000
Reexamination Certificate
active
07009679
ABSTRACT:
A chiral structure having an expanded adjustable reflection band to provide broadband tunability is provided. In the preferred embodiment, the chiral structure is implemented as a chiral fiber structure and comprises two or more sequential chiral fiber elements of different pitches, each having a tunable chiral defect generator. The pitches are selected such that the individual photonic band gaps of the elements are formed into one expanded reflection band such that at least one defect state can be formed and moved within the expanded reflection band by selectively activating and adjusting one or more of the tunable chiral defect generator. The tunable chiral defect generators may generate and control defect state(s) in the structure's spectral response by introducing chiral twists and/or spacing between the chiral elements, with the length of the spacings and angles of chiral twists being proportional to the position of the defect state(s) within the reflection band of the structure.
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Genack Azriel Zelig
Kopp Victor Il'ich
Chiral Photonics, Inc.
Etkin, Esq. Edward
Parker Kenneth
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